SmartSTACK
ELH100-12/24TX
FAST ETHERNET HUB
INSTALLATION
AND
USER GUIDE
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Notice
Only qualified personnel should perform installation
procedures.
NOTICE
Cabletron Systems reserves the right to make changes in specifications and other information
contained in this document without prior notice. The reader should in all cases consult Cabletron
Systems to determine whether any such changes have been made.
The hardware, firmware, or software described in this manual is subject to change without notice.
IN NO EVENT SHALL CABLETRON SYSTEMS BE LIABLE FOR ANY INCIDENTAL,
INDIRECT, SPECIAL, OR CONSEQUENTIAL DAMAGES WHATSOEVER (INCLUDING BUT
NOT LIMITED TO LOST PROFITS) ARISING OUT OF OR RELATED TO THIS MANUAL OR
THE INFORMATION CONTAINED IN IT, EVEN IF CABLETRON SYSTEMS HAS BEEN
ADVISED OF, KNOWN, OR SHOULD HAVE KNOWN, THE POSSIBILITY OF SUCH
DAMAGES.
1999 by Cabletron Systems, Inc., P.O. Box 5005, Rochester, NH 03866-5005
All Rights Reserved
Printed in Taiwan, R.O.C.
Order Number: 9033060 May 1999
Cabletron, Cabletron Systems, and SmartSTACK are trademarks or registered trademarks of
Cabletron Systems, Inc.
Microsoft, Windows, Windows 95, Windows 98, and Windows NT are either trademarks or
registered trademarks of Microsoft Corporation.
Netscape and Netscape Navigator are trademarks of Netscape Communications Corporation.
All other product names mentioned in this manual may be trademarks or registered trademarks of
their respective companies.
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Notice
FCC NOTICE
This device complies with Part 15 of the FCC rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
NOTE: This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial environment.
This equipment uses, generates, and can radiate radio frequency energy and if not installed in
accordance with the operator’s manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause interference in which case the user
will be required to correct the interference at his own expense.
WARNING: Changes or modifications made to this device which are not expressly approved by the
party responsible for compliance could void the user’s authority to operate the equipment.
INDUSTRY CANADA NOTICE
This digital apparatus does not exceed the Class A limits for radio noise emissions from digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables
aux appareils numériques de la class A prescrites dans le Règlement sur le brouillage radioélectrique
édicté par le ministère des Communications du Canada.
VCCI NOTICE
This is a Class A product based on the standard of the Voluntary Control Council for Interference by
Information Technology Equipment (VCCI). If this equipment is used in a domestic environment,
radio disturbance may arise. When such trouble occurs, the user may be required to take corrective
actions.
ii
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Notice
CABLETRON SYSTEMS, INC.
PROGRAM LICENSE AGREEMENT
IMPORTANT: THIS LICENSE APPLIES FOR USE OF PRODUCT IN THE FOLLOWING
GEOGRAPHICAL REGIONS:
CANADA
MEXICO
CENTRAL AMERICA
SOUTH AMERICA
BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT,
CAREFULLY READ THIS LICENSE AGREEMENT.
This document is an agreement (“Agreement”) between You, the end user, and Cabletron
Systems, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the Cabletron
software program (“Program”) in the package. The Program may be contained in firmware, chips or
other media. UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO BECOME
BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE LICENSE AND
THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF YOU DO NOT
AGREE TO THE TERMS OF THIS AGREEMENT, RETURN THE UNOPENED PRODUCT TO
CABLETRON OR YOUR DEALER, IF ANY, WITHIN TEN (10) DAYS FOLLOWING THE
DATE OF RECEIPT FOR A FULL REFUND.
IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT CABLETRON
SYSTEMS (603) 332-9400. Attn: Legal Department.
1.
LICENSE. You have the right to use only the one (1) copy of the Program provided in this
package subject to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the United States or as authorized in writing by Cabletron.
2.
OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the
Program.
3.
APPLICABLE LAW. This License Agreement shall be interpreted and governed under the
laws and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and
venue of the New Hampshire courts.
4.
EXPORT REQUIREMENTS. You understand that Cabletron and its Affiliates are subject to
regulation by agencies of the U.S. Government, including the U.S. Department of Commerce, which
prohibit export or diversion of certain technical products to certain countries, unless a license to export
the product is obtained from the U.S. Government or an exception from obtaining such license may be
relied upon by the exporting party.
If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Administration Regulations, You agree that You are a civil end user of the Program
and agree that You will use the Program for civil end uses only and not for military purposes.
9033060
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Notice
If the Program is exported from the United States pursuant to the License Exception TSR under
the U.S. Export Administration Regulations, in addition to the restriction on transfer set forth in
Sections 1 or 2 of this Agreement, You agree not to (i) reexport or release the Program, the source
code for the Program or technology to a national of a country in Country Groups D:1 or E:2 (Albania,
Armenia, Azerbaijan, Belarus, Bulgaria, Cambodia, Cuba, Estonia, Georgia, Iraq, Kazakhstan,
Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, Uzbekistan, Vietnam, or such other
countries as may be designated by the United States Government), (ii) export to Country Groups D:1
or E:2 (as defined herein) the direct product of the Program or the technology, if such foreign
produced direct product is subject to national security controls as identified on the U.S. Commerce
Control List, or (iii) if the direct product of the technology is a complete plant o r any major
component of a plant, export to Country Groups D:1 or E:2 the direct product of the plant or a major
component thereof, if such foreign produced direct product is subject to national security controls as
identified on the U.S. Commerce Control List or is subject to State Department controls under the
U.S. Munitions List.
5.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i)
was developed solely at private expense; (ii) contains “restricted computer software” submitted with
restricted rights in accordance with section 52.227-19 (a) through (d) of the Commercial Computer
Software-Restricted Rights Clause and its successors, and (iii) in all respects is proprietary data
belonging to Cabletron and/or its suppliers. For Department of Defense units, the Product is considered
commercial computer software in accordance with DFARS section 227.7202-3 and its successors, and
use, duplication, or disclosure by the Government is subject to restrictions set forth herein.
6.
EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in
writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its
documentation and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO
YOU BY CABLETRON IN WRITING, EITHER EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING
WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.
7.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL
CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER
(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS,
BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL,
CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS) ARISING OUT OF THE
USE OR INABILITY TO USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO
NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES, OR IN THE DURATION OR LIMITATION OF IMPLIED
WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY
NOT APPLY TO YOU.
iv
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Notice
CABLETRON SYSTEMS SALES AND SERVICE, INC.
PROGRAM LICENSE AGREEMENT
IMPORTANT: THIS LICENSE APPLIES FOR USE OF PRODUCT IN THE UNITED
STATES OF AMERICA AND BY UNITED STATES OF AMERICA
GOVERNMENT END USERS.
BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT,
CAREFULLY READ THIS LICENSE AGREEMENT.
This document is an agreement (“Agreement”) between You, the end user, and Cabletron Systems
Sales and Service, Inc. (“Cabletron”) that sets forth your rights and obligations with respect to the
Cabletron software program (“Program”) in the package. The Program may be contained in firmware,
chips or other media. UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO
BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE
LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF
YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, RETURN THE UNOPENED
PRODUCT TO CABLETRON OR YOUR DEALER, IF ANY, WITHIN TEN (10) DAYS
FOLLOWING THE DATE OF RECEIPT FOR A FULL REFUND.
IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT CABLETRON
SYSTEMS (603) 332-9400. Attn: Legal Department.
1.
LICENSE. You have the right to use only the one (1) copy of the Program provided in this
package subject to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the United States or as authorized in writing by Cabletron.
2.
OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the
Program.
3.
APPLICABLE LAW. This License Agreement shall be interpreted and governed under the
laws and in the state and federal courts of New Hampshire. You accept the personal jurisdiction and
venue of the New Hampshire courts.
4.
EXPORT REQUIREMENTS. You understand that Cabletron and its Affiliates are subject to
regulation by agencies of the U.S. Government, including the U.S. Department of Commerce, which
prohibit export or diversion of certain technical products to certain countries, unless a license to export
the product is obtained from the U.S. Government or an exception from obtaining such license may be
relied upon by the exporting party.
If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Administration Regulations, You agree that You are a civil end user of the Program
and agree that You will use the Program for civil end uses only and not for military purposes.
9033060
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Notice
If the Program is exported from the United States pursuant to the License Exception TSR under
the U.S. Export Administration Regulations, in addition to the restriction on transfer set forth in
Sections 1 or 2 of this Agreement, You agree not to (i) reexport or release the Program, the source
code for the Program or technology to a national of a country in Country Groups D:1 or E:2 (Albania,
Armenia, Azerbaijan, Belarus, Bulgaria, Cambodia, Cuba, Estonia, Georgia, Iraq, Kazakhstan,
Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, Uzbekistan, Vietnam, or such other
countries as may be designated by the United States Government), (ii) export to Country Groups D:1
or E:2 (as defined herein) the direct product of the Program or the technology, if such foreign
produced direct product is subject to national security controls as identified on the U.S. Commerce
Control List, or (iii) if the direct product of the technology is a complete plant o r any major
component of a plant, export to Country Groups D:1 or E:2 the direct product of the plant or a major
component thereof, if such foreign produced direct product is subject to national security controls as
identified on the U.S. Commerce Control List or is subject to State Department controls under the
U.S. Munitions List.
5.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i)
was developed solely at private expense; (ii) contains “restricted computer software” submitted with
restricted rights in accordance with section 52.227-19 (a) through (d) of the Commercial Computer
Software-Restricted Rights Clause and its successors, and (iii) in all respects is proprietary data
belonging to Cabletron and/or its suppliers. For Department of Defense units, the Product is considered
commercial computer software in accordance with DFARS section 227.7202-3 and its successors, and
use, duplication, or disclosure by the Government is subject to restrictions set forth herein.
6.
EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in
writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its
documentation and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO
YOU BY CABLETRON IN WRITING, EITHER EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING
WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.
7.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL
CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER
(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS,
BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL,
CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS) ARISING OUT OF THE
USE OR INABILITY TO USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO
NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES, OR IN THE DURATION OR LIMITATION OF IMPLIED
WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY
NOT APPLY TO YOU.
vi
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Notice
CABLETRON SYSTEMS LIMITED
PROGRAM LICENSE AGREEMENT
IMPORTANT: THIS LICENSE APPLIES FOR THE USE OF THE PRODUCT IN THE
FOLLOWING GEOGRAPHICAL REGIONS:
EUROPE
MIDDLE EAST
AFRICA
ASIA
AUSTRALIA
PACIFIC RIM
BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT,
CAREFULLY READ THIS LICENSE AGREEMENT.
This document is an agreement (“Agreement”) between You, the end user, and Cabletron
Systems Limited (“Cabletron”) that sets forth your rights and obligations with respect to the
Cabletron software program (“Program”) in the package. The Program may be contained in firmware,
chips or other media. UTILIZING THE ENCLOSED PRODUCT, YOU ARE AGREEING TO
BECOME BOUND BY THE TERMS OF THIS AGREEMENT, WHICH INCLUDES THE
LICENSE AND THE LIMITATION OF WARRANTY AND DISCLAIMER OF LIABILITY. IF
YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT, RETURN THE UNOPENED
PRODUCT TO CABLETRON OR YOUR DEALER, IF ANY, WITHIN TEN (10) DAYS
FOLLOWING THE DATE OF RECEIPT FOR A FULL REFUND.
IF YOU HAVE ANY QUESTIONS ABOUT THIS AGREEMENT, CONTACT CABLETRON
SYSTEMS (603) 332-9400. Attn: Legal Department.
1.
LICENSE. You have the right to use only the one (1) copy of the Program provided in this
package subject to the terms and conditions of this License Agreement.
You may not copy, reproduce or transmit any part of the Program except as permitted by the
Copyright Act of the United States or as authorized in writing by Cabletron.
2.
OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the
Program.
3.
APPLICABLE LAW. This License Agreement shall be governed in accordance with English
law. The English courts shall have exclusive jurisdiction in the event of any disputes.
4.
EXPORT REQUIREMENTS. You understand that Cabletron and its Affiliates are subject to
regulation by agencies of the U.S. Government, including the U.S. Department of Commerce, which
prohibit export or diversion of certain technical products to certain countries, unless a license to export
the product is obtained from the U.S. Government or an exception from obtaining such license may be
relied upon by the exporting party.
If the Program is exported from the United States pursuant to the License Exception CIV under
the U.S. Export Administration Regulations, You agree that You are a civil end user of the Program
and agree that You will use the Program for civil end uses only and not for military purposes.
9033060
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Notice
If the Program is exported from the United States pursuant to the License Exception TSR under
the U.S. Export Administration Regulations, in addition to the restriction on transfer set forth in
Sections 1 or 2 of this Agreement, You agree not to (i) reexport or release the Program, the source
code for the Program or technology to a national of a country in Country Groups D:1 or E:2 (Albania,
Armenia, Azerbaijan, Belarus, Bulgaria, Cambodia, Cuba, Estonia, Georgia, Iraq, Kazakhstan,
Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China,
Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, Uzbekistan, Vietnam, or such other
countries as may be designated by the United States Government), (ii) export to Country Groups D:1
or E:2 (as defined herein) the direct product of the Program or the technology, if such foreign
produced direct product is subject to national security controls as identified on the U.S. Commerce
Control List, or (iii) if the direct product of the technology is a complete plant o r any major
component of a plant, export to Country Groups D:1 or E:2 the direct product of the plant or a major
component thereof, if such foreign produced direct product is subject to national security controls as
identified on the U.S. Commerce Control List or is subject to State Department controls under the
U.S. Munitions List.
5.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i)
was developed solely at private expense; (ii) contains “restricted computer software” submitted with
restricted rights in accordance with section 52.227-19 (a) through (d) of the Commercial Computer
Software-Restricted Rights Clause and its successors, and (iii) in all respects is proprietary data
belonging to Cabletron and/or its suppliers. For Department of Defense units, the Product is considered
commercial computer software in accordance with DFARS section 227.7202-3 and its successors, and
use, duplication, or disclosure by the Government is subject to restrictions set forth herein.
6.
EXCLUSION OF WARRANTY. Except as may be specifically provided by Cabletron in
writing, Cabletron makes no warranty, expressed or implied, concerning the Program (including its
documentation and media).
CABLETRON DISCLAIMS ALL WARRANTIES, OTHER THAN THOSE SUPPLIED TO
YOU BY CABLETRON IN WRITING, EITHER EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, WITH RESPECT TO THE PROGRAM, THE ACCOMPANYING
WRITTEN MATERIALS, AND ANY ACCOMPANYING HARDWARE.
7.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL
CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER
(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS,
BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL,
CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS) ARISING OUT OF THE
USE OR INABILITY TO USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO
NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR
INCIDENTAL DAMAGES, OR IN THE DURATION OR LIMITATION OF IMPLIED
WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY
NOT APPLY TO YOU.
viii
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Notice
DECLARATION OF CONFORMITY
Application of Council Directive(s): 89/336/EEC
73/23/EEC
Manufacturer’s Name: Cabletron Systems, Inc.
Manufacturer’s Address: 35 Industrial Way
PO Box 5005
Rochester, NH 03867
European Representative Name: Mr. J. Solari
European Representative Address: Cabletron Systems Limited
Nexus House, Newbury Business
Park
London Road, Newbury
Berkshire RG13 2PZ, England
Conformance to Directive(s)/Product Standards: EC Directive 89/336/EEC
EC Directive 73/23/EEC
EN 55022
EN 50082-1
EN 60950
Equipment Type/Environment: Networking Equipment, for use in a
Commercial or Light Industrial
Environment.
We the undersigned, hereby declare, under our sole responsibility, that the equipment packaged
with this notice conforms to the above directives.
Manufacturer
Legal Representative in Europe
Mr. Ronald Fotino
Mr. J. Solari
___________________________________
___________________________________
Full Name
Full Name
Compliance Engineering Manager
Managing Director - E.M.E.A.
___________________________________
___________________________________
Title
Title
Rochester, NH, USA
Newbury, Berkshire, England
___________________________________
___________________________________
Location
Location
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Table Of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvi
1. Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Optional Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Non-volatile Parameter Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
RMON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
BootP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Site Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Installing an Optional Module into the Hub . . . . . . . . . . . . . . . . . . . . . . 17
In-Band Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Agent Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Powering the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Network Cable Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Fiber. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
10Base-T/100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
100Base-FX Fiber Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
9033060
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3. ELH100-12/24TX User Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
User Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Menu Hierarchy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Module Port Configuration Menu . . . . . . . . . . . . . . . . . . . . . . . . . 42
Hub Statistics Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Port Statistics Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4. Configuring & Monitoring the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Viewing Hub Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Spanning Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Configuring BootP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
5. Web-Based Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Navigating the Web Browser Interface. . . . . . . . . . . . . . . . . . . . . . . . . 61
Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Stack Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Agent Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Hub Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
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MIB Browser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
RMON Browser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Error Packets Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Utilization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
6. SNMP Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
The SNMP Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
MIB Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
APPENDIX A. Technical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Console Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
10Base-T and 100Base-TX Ports . . . . . . . . . . . . . . . . . . . . . . . . . 93
MDI/MDI-X Crossover Cable Wiring . . . . . . . . . . . . . . . . . . . . . . . 94
Power Cord Set Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Country-Specific Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
APPENDIX B. Acronyms & Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
INDEX
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PREFACE
Purpose
This guide provides information about the features and applications of the
Cabletron ELH100-12/24TX dual-speed hub as well as instructions for
configuring and monitoring the hub.
Audience
This guide is intended for Ethernet local area network (LAN)
administrators and Management Information Systems (MIS) personnel
with the following background:
•
•
Working knowledge of Ethernet LANs
Familiarity with Transmission Control Protocol/Internet Protocol
(TCP/IP) and Simple Network Management Protocol (SNMP)
Conventions
This section describes the conventions used in this guide.
Message Formats
Two types of messages, identified by icons, appear in the text:
A note informs you of special circumstances.
A caution indicates the possibility of equipment damage.
Keyboard Entries
This guide uses the following conventions for keyboard entries:
•
•
•
When you read “enter,” type the text and press the [Enter] key.
Example: Enter the Gateway IP address and press the [Enter] key.
When you read “select,” highlight the menu item and press the [Enter]
key.
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Other Conventions
This guide uses the following typographical conventions:
•
•
•
Initial Caps
[Enter]
Menu titles and console menu selections.
Used to designate the Enter or Return key.
ALL CAPS
Used to designate fields within the console menus
(Example: CONNECTION).
•
•
•
courier font Screen messages and user prompts.
Selection
Field
Describes a user-configurable user interface item.
Describes a read-only information item.
Organization
Chapter 1. Product Overview: Describes the features of the hub, front
and rear panel components and application examples.
Chapter 2. Installation: Describes the content of your hub shipment, lists
site requirements, and provides mounting instructions. Instructions for
making connections and powering up the hub are provided as well.
Chapter 3. ELH100-12/24TX User Interface: Describes the user
interface console menus and lists the factory defaults for system settings.
Each of the console menus are presented along with a description of the
selections/fields available within each menu.
Chapter 4. Configuring and Monitoring the Hub: Describes common
tasks and associated steps required to configure the hub, and covers
common hub and network considerations required to ensure system
integrity.
Chapter 5. Web-Based Management: Describes the tasks and
associated steps required to configure the hub via the embedded Web
agent. It also covers information on using the RMON Browser.
Chapter 6. SNMP Management: Describes how the Simple Network
Management Protocol (SNMP) communication protocol is used to
manage the hub, and provides a description of industry standard and
proprietary Managed Information Bases (MIBs) supported by the hub.
Appendix A. Technical Specifications: Provides a list of standards
compliance and certifications as well as physical and operational
specifications.
Appendix B. Acronyms and Abbreviations: Provides definitions for a
list of common acronyms and abbreviations used within the user guide
and the networking industry.
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1. PRODUCT OVERVIEW
Description
This installation and user guide describes Cabletron’s ELH100-12/24TX
Fast Ethernet hubs. These hubs provide the easiest method of upgrading
your network to Fast Ethernet. There’s no need to replace your existing
network infrastructure. Just add Cabletron’s hub to your network and
attach any 10 or 100 Mbps device to any port on the hub. These hubs
provide both a 10 Mbps segment needed for common file transfers, as
well as a 100 Mbps segment for relieving serious network congestion,
running multimedia applications, or satisfying power users.
These hubs include a wide range of configuration options. They can be
stacked together (up to 6 high) to form a dual-speed network of up to 144
ports. With a Class II rating, they can also be easily cascaded to additional
10 or 100 Mbps hubs. With an optional switch/media module, you can link
the hub’s 10 Mbps and 100 Mbps segments together to form a bridged
network, allowing traffic to pass between the segments when required.
Optional switch/media modules are also provided for 10Base-T/100Base-
TX and 100Base-FX media types. The fiber modules allow you to connect
the stack to remote locations up to 1.24 miles away (2 kilometers). Each
of these switch/media modules provide a switched connection to the
stack, breaking the two-hop count for Fast Ethernet by placing all the
devices attached to the module in a separate collision domain. The
modules operate at full wire speed with full address and frame filtering.
They automatically learn node addresses from the network and store
them in a Media Access Control (MAC) address forwarding table.
Incoming packets are then forwarded on to the stack or filtered based on
the addresses in the packet.
The optional RMON/SNMP/Web Agent Module provides a broad range of
management options. It includes a standards-compliant Simple Network
Management Protocol (SNMP) agent. The SNMP agent allows network
management station applications to collect and present status and
performance information about the stack, as well as providing the ability
to configure and control functions on the stack. The module also supports
Remote Monitoring (RMON) for Statistics, History, Alarm and Event
groups (Groups 1-3, 9).
Network management can be performed in-band using TCP/IP, Telnet, or
via a SLIP connection to the serial console port on the Agent Module. This
module also includes a built-in Web agent that provides management
access via common http browsers such as Netscape Navigator and
Microsoft’s Internet Explorer. In addition, the console port allows out-of-
band management using a PC, terminal, or modem connection.
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The ELH100-12/24TX hub is desktop or rack-mountable. LEDs on the
front panel provide information about the operating status of the hub. The
back panel contains the power connector, redundant power connector,
and stack connectors. The side panel includes two fans that maintain
ventilation and cooling for internal hub components.
This chapter provides the following information:
•
•
•
•
•
Product Description
Features
Front and Rear Panel Component Descriptions
Feature Summaries
Application Example
Features
•
Ports:
- 12/24 dual-speed 10Base-T/100Base-TX ports using RJ-45
connectors (MDI-X)
Note: Port 12/24 includes a toggle switch for MDI-X or MDI connection
- 2 SCSI connectors for stacking hubs
- 1 redundant power unit socket
•
Optional Switch/Media Modules:
- ELH-ULSW-TX: 10Base-T/100Base-TX Module* provides 1
RJ-45 port for a bridged connection to the stack, as well as
bridging between the 10 and 100 Mbps stack segments
* Includes MDI-X or MDI connection (only 1 connection active at a time)
- ELH-ULSW-F2: 100Base-FX Module provides 1 SC
multimode fiber optic port for a bridged connection to the stack,
as well as bridging between the 10 and 100 Mbps stack
segments
•
•
Optional RMON/SNMP/Web Agent Module:
- ELH100-SNMP: Agent Module provides SNMP, RMON, and
Web management support for the stack. Only two agent
modules are allowed in a stack: one active and one in standby
mode.
Hub Architecture:
- 2 segment repeaters for 10 and 100 Mbps
- 3 or 6 Quad Controllers with 4 10/100 ports, 2 10/100 segment
repeaters, cascaded backplanes, serial management interface
- IEEE 802.3u auto-sensing for 10/100 Mbps speed operation
on all RJ-45 ports (not required on attached device)
- Up to 6 hub units can be stacked together, supporting up to
144 connections
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•
Switch Architecture (for optional switch/media modules):
- Bridges 10 and 100 Mbps repeater buses for the stack
- 200 Mbps throughput
- 2 MB packet buffering
- Store-and-forward switching
-
Module: 4096 address forwarding table per segment
- Forwarding: 14,880 packets-per-second (64 byte packets)
@10 Mbps; 148,800 pps @100 Mbps
- Filtering: 14,880 packets-per-second (64 byte packets) @10
Mbps; 148,800 pps @100 Mbps
•
Network Management:
- SNMP compliant agent: MIB II (RFC 1213); Multi-segment
Repeater MIB (RFC 2108), Ethernet-like MIB (RFC1643);
RMON - Statistics, History, Alarm and Event groups per
segment (RFC 1757); private MIB extensions
- Access via in-band, Internet browser, or Telnet
- Console port (RS-232, male DB-9 connector, null modem)
supports access via direct, modem, or SLIP connection
- BootP for IP address configuration
•
Reliability:
- Automatic partition and reconnection
- Automatic polarity detection (and inversion if needed)
- Automatic cascade bypass if a hub in the stack is powered off
- Agent Module supports power-on self test, backup agent
module, port link backup for up to 15 pairs, and intrusion
detection
•
•
Software:
- Extensive diagnostics for product testing and troubleshooting
- Firmware upgrades using the console port or in-band with
TFTP
LED Indicators:
- System: Power, Switch
- 10 and 100 Mbps segments: Activity, Collision
- 10Base-T/100Base-TX Ethernet hub ports: link/partition/speed
- Switch/Media modules: Collision, Activity, Full/Half duplex, Link
- Agent Module: Active
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Front Panel
Figure 1-1 shows the front panel of the Cabletron ELH100-24TX.
Table 1-1 defines the ELH100-12/24TX front panel components.
Figure 1-1. ELH100-24TX Front Panel
X
X
X
X
X
X
X
X
X
X
X
X
ELH100-24TX
Table 1-1. Front Panel Components
Function
Name
PWR LED
Lights steady green to indicate power is supplied to the
hub. Off indicates no power is supplied to the hub.
SWITCH LED
Lights steady green to indicate that the Switch/Media
Module is active. Flashing indicates that another
module in the stack is active. (If the active module fails,
you must remove it from the stack to initialize a backup
switch/media module located in another hub in the
stack.)
Segment LEDs
(10M, 100M)
Activity: Flashing indicates traffic on the segment.
Collision: Flashing indicates that two or more devices
attempted to transmit data at the same time. (This is a
normal situation under Ethernet CSMA/CD.)
Port LEDs
On indicates link; off indicates no link; and flashing
indicates that the port has been partitioned. Yellow
indicates a 10 Mbps connection; green indicates a 100
Mbps connection.
10Base-T/100Base-TX
RJ-45 ports
Copper ports using RJ-45 port connectors. These
ports are wired MDI-X, except for the last port which
includes a selection switch for MDI-X or MDI
connection.
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Optional Modules
Figure 1-2 shows the optional modules available for the Cabletron
ELH100-12/24TX. Table 1-2 defines the optional module components.
Figure 1-2. Optional Modules
Table 1-2. Optional Module Components
Module
Components
10Base-T/100Base-TX
Ports: Copper ports using RJ-45 connectors. Use either
the MDI-X or MDI connector when attaching a device
to this module. (See 10Base-T/100Base-TX Ports on
page 24 for a detailed description of these ports.)
Mode switch: If the attached device must operate at
100 Mbps, full duplex, then set this switch to 100Full;
otherwise, set it to Auto.
Port LEDs: See Table 1-3 for details.
100Base-FX
Ports: Fiber ports using SC connectors for uplink. (See
100Base-FX Fiber Ports on page 25 for a detailed
description of these ports.)
Mode switch: If the attached device must operate at full
duplex, set this switch to Full; otherwise, set it to Half.
Port LEDs: See Table 1-3 for details.
Agent
Console port: Male DB-9 connector configured as a
null modem connection for serial out-of-band
management using the console menus, or for in-band
management when used with SLIP protocol.
Active LED: On when the Agent Module is active; off
when the module is in standby mode, and flashing if
the module failed the power-on self-test.
Only two agent modules are allowed in a stack: one
active and one in standby mode.
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Figure 1-3 shows the Collision, Activity, Full/Half duplex, and Link LEDs
for the switch/media modules. These LEDs are positioned to the left of the
ports. In addition, the 10Base-T/100Base-TX module includes a 100M
port is operating at 100 Mbps, and Off indicates 10 Mbps).
Figure 1-3. Port LEDs on the Switch/Media Modules
Collision
Full/Half
Activity
Link
Table 1-3 defines the performance of the port LEDs on the optional modules.
Table 1-3. Port LEDs for Modules Defined
Function
Name
Collision
Flashing: Two or more devices attempted to transmit data at the same
time. (Normal situation under Ethernet CSMA/CD.)
Activity
Full/Half
Link
Flashing: Indicates the presence of transmit and/or receive activity.
Off: Indicates the absence of transmit or receive activity.
On: Indicates the port is in full duplex mode.
Off: Indicates the port is in half duplex mode.
On: Indicates a valid connection (link) on the associated port.
Off: Indicates no link on the associated port.
100M*
On: Indicates that the port is operating at 100 Mbps.
Off: Indicates that the port is operating at 10 Mbps.
* This LED only appears on the 10Base-T/100Base-TX module.
The Switch/Media modules do not support Span-
ning Tree, which is intended to prevent network
loops from forming. There is no loop detection. The
user is cautioned to understand and avoid configu-
rations that can create a loop.
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Rear Panel
Figure 1-4 shows the ELH100-12/24TX rear panel and Table 1-4 defines
the rear panel components.
Figure 1-4. ELH100-12/24TX Rear Panel
Table 1-4. Rear Panel Components
Name
Function
Power Connector
Provides AC power to the switch.
Redundant Power
Connector
This connector is provided for a redundant power unit
(RPU) which can supply power to the hub if its primary
power supply fails. (Refer to the manual provided with
the RPU for further details.)
Stack Connectors
Allows you to stack up to 6 units to form a dual-speed
network of up to 144 ports.
Feature Summaries
The following summaries describe ELH100-12/24TX features in areas
such as standards compliance, functionality, performance, and options.
Dual-Speed Architecture
The ELH100-12/24TX hub provides both 10 and 100 Mbps repeater
buses. The speed of the device connected to each port is automatically
detected by the hub, and the port attached to the appropriate bus. Up to
6 hubs can be stacked together to form a dual-speed network. An optional
switch/media module can be added to any hub in the stack to bridge traffic
between the 10 Mbps and 100 Mbps repeater buses as required.
Software Download
The ELH100-12/24TX hubs support the industry-standard Trivial File
Transfer Protocol (TFTP) for downloading agent software. All hub
software is stored in a 2 MB flash ROM. The download feature allows you
to easily install software upgrades to the Agent Module. Software can
alternatively be downloaded via the serial console port using the
XMODEM protocol. You can download to permanent flash ROM, or you
can download to temporary storage in RAM for test purposes.
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A TFTP or XMODEM software download is invoked via the console
menus. A TFTP download can also be invoked via SNMP or Web-based
manager.
Non-volatile Parameter Storage
All important operating parameters, such as management data and port
configurations, are stored in non-volatile Flash memory. These values are
retained when the hub experiences power interruptions or is powered
down for normal maintenance.
Configuration and Management Interfaces
The ELH100-12/24TX hub, or attached stack, can be managed using any
of the following methods:
•
Serial console, out-of-band or in-band
An RS-232 connection, using a DB-9 connector, is included on the
Agent Module for system management. Serial console management
can be performed out-of-band using a terminal or computer running
communications software. You can connect directly to the RS-232
port on the Agent Module, or make a connection via a modem. See
Chapter 3, ELH100-12/24TX User Interface, for information on
You can also make an in-band connection to the RS-232 port on the
Agent Module with SLIP protocol. Using this kind of connection, you
can manage the system via any of the methods listed below.
•
Telnet, in-band (over Ethernet)
The hub supports management through a Telnet connection using
the TCP/IP protocols. Telnet is performed using a terminal or
computer running communications software. See Chapter 3,
ELH100-12/24TX User Interface, for information on managing the
system via Telnet. Global user name and password protection for
changing the operating parameters of the hub is provided.
•
•
Web-based network manager, in-band
The system can be managed over HTTP protocol with a Web
browser (Internet Explorer 3.0 or above, or Netscape Navigator 3.0
or above). Standard agent MIBs embedded in the hub provide basic
SNMP management through an embedded graphic interface.
SNMP-based network manager, in-band
The system can also be managed using SNMP, the most common
protocol used today for network management. Standard agent MIBs
embedded in the hub provide basic SNMP management through
industry-standard SNMP applications.
Management security protection is provided based on SNMP
community names. See Chapter 6, SNMP Management, for more
information.
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RMON
RMON (Remote Monitoring) is a facility used to manage networks
remotely while providing multi-vendor interoperability between monitoring
devices and management stations. RMON is defined by an SNMP MIB.
This MIB is divided into nine different groups, each gathering specific
statistical information or performing a specific function. RMON-capable
devices gather network traffic data and then store them locally until
downloaded to an SNMP management station.
The ELH100-12/24TX supports four of the nine groups of RMON defined
for Ethernet networks on a per segment basis. Specifically, these are:
•
•
•
•
Statistics: a function that maintains counts of network traffic statistics
such as number of packets, broadcasts, collisions, errors, and
distribution of packet sizes.
History: a function that collects historical statistics based on user-
defined sampling intervals. The statistical information collected is the
same as the Statistics group, except on a time stamped basis.
Alarm: a function that allows managers to set alarm thresholds based
on traffic statistics. Alarms trigger other actions through the Event
group.
Event: a function that operates with the Alarm group to define an
action that will be taken when an alarm condition occurs. The event
may write a log entry and/or send a trap message.
Because the Agent Module must be attached to either the 10 or 100 Mbps
stack segment, RMON can only be activated for one segment at a time.
You must therefore use an out-of-band connection to the Agent Module
to select the segment to activate for RMON. However, note that RMON
statistics and other information can only be viewed using a connection to
the on-board web agent or via other compatible SNMP management
applications.
Auto-Sensing and Auto-Negotiation
Auto-sensing is a process that permits the hub to automatically select the
operational speed of its ports. When an RJ-45 port on the base unit is
connected, the hub detects and configures the port to the speed of the
network the port is connected to, either 10 Mbps or 100 Mbps. Auto-
sensing is configurable in the Port Configuration Menu of the console
menus or via SNMP.
The 10Base-T/100Base-TX optional modules support auto-negotiation.
The port automatically negotiates the best connection possible with the
attached device. However, if the attached device must operate at full
duplex, then it must also support auto-negotiation. Otherwise, you can set
the mode manually using the mode selection switch on the module, or via
the management agent.
The 100Base-FX module does not support auto-negotiation. You need to
configure the duplex setting via the front panel switch.
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BootP
The Bootstrap Protocol (BootP) provides for the capability of passing
configuration information to hosts on a TCP/IP network. Using this
process, network devices do not need to be configured before they can
communicate using the TCP/IP protocol suite. The ELH100-12/24TX
uses BootP to automatically configure IP address information without
requiring access to the console menus. BootP operation is configurable
using the System Configuration Menu of the console menus, the on-board
Web agent, or via SNMP.
LEDs
The port LEDs on the hub unit provide a quick and accurate display of the
integrity of hub connections, indicating link and partition for each of the
ports. The port LEDs on the optional switch/media modules indicate Link,
Activity, Collision, Full/Half duplex mode, and speed (100M) for each of
the ports.
The 100M LED appears only on the 10Base-T/
100Base-TX module.
Full Duplex Mode
Full duplex mode is supported on the optional switch/media modules. This
mode of operation can double the throughput of port connections, by
disabling the collision detection portion of the Ethernet Carrier Sense
Multiple Access with Collision Detection (CSMA/CD) protocol, allowing for
two-way traffic. Full duplex is configurable using the Duplex parameter in
the Switch/Media Menu of the console menus or via SNMP.
Application Example
The exploding popularity of the Internet and of corporate intranets, as well
as new, high-bandwidth desktop applications, are driving the demand for
Fast Ethernet. The need to gradually phase in Fast Ethernet networks,
without abandoning existing 10 Mbps network segments, is driving the
need for economical dual-speed network solutions.
The ELH100-12/24TX hubs are ideal for gradually building up the network
infrastructure needed to meet the demands of today’s data intensive
applications, while retaining the use of legacy network equipment. The
hubs’ low cost, high port count, and stacking capability make them
attractive and affordable for dedicated 10/100 Mbps connections to the
desktop. In addition, extensive features, including redundant links, port
security, and micro-segmentation of bus connections, provide the
management needed for the workgroup and local backbone.
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Using the ELH100-12/24TX hub in an application example for client/
server networks, users can be connected directly to the local network,
regardless of whether they are operated at either 10 or 100 Mbps. Up to
144 connections can be supported by stacking up to 6 hubs. Being a
Class II hub, additional 10Mbps or 100 Mbps hubs can be attached to the
stack. The optional modules provide full duplex switched connections that
can improve workstation performance in a client/server environment, or
be used to aggregate traffic on the stack to the local backbone.
Figure 1-5. Client/Server Network Application
F2
F2
F2
F2
F2
F2
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2. INSTALLATION
Inspecting Your Shipment
When you receive the shipment of your hub, check the package contents
and make sure you have the following items:
•
•
•
•
•
•
ELH100-12/24TX dual speed Ethernet hub
Mounting ears and mounting screws
Four rubber feet
Stack cable
Power cord
This document
Site Requirements
Before you install the hub, make sure the site meets the following
requirements:
•
Mounting
Provide a flat table, shelf surface, or an optional 19 in. (48.3 cm)
equipment rack.
Use an EIA standard equipment rack that is grounded and physically
secure.
•
Power source
Provide a power source within six feet (1.8 m) of the installation
location. This source must provide 100 VAC to 240 VAC, and 50 Hz
to 60 Hz power, with a 50 VA minimum. Power specifications for the
hub are shown in Appendix A, “Technical Specifications.”
Primary voltage selection within the above ranges is
automatic and requires no user action.
•
•
Environmental
Install the ELH100-12/24TX hub in a dry area, with adequate air
circulation. Avoid placing the hub in direct sunlight or near other heat
sources, such as hot-air vents. For temperature and humidity
specifications, see Appendix A, “Technical Specifications.”
Ventilation
Do not restrict airflow by covering or obstructing air inlets on the side
of the hub.
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Installation 13
Mounting the Hub or Stack on a Table or Shelf
You can mount a standalone hub (or a stack of up to six hubs) on a table
or shelf. Locate the hub (stack) in a position that allows access to the front
panel RJ-45 ports, visibility of the port LEDs, and access to the power
cord. Make sure that the mounting surface can safely support the hub
(stack) and that there is adequate space around the hub (stack) for
ventilation and cooling.
1. The hub ships with four (4) rubber feet. Stick the self-adhesive rubber
foot pads on each of the four concave spaces located on the bottom
of the hub. The rubber foot pads cushion the hub against shock/
vibrations and provide space between each hub for ventilation.
2. If you want to stack hubs, repeat step 1 for each hub to be stacked.
Place the first hub on a firm flat surface where you want to install the
stack. Stack the other hubs on top of this unit.
3. Refer to "Connecting Hubs to the Stack’s Backplane" on page 16.
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Mounting the Hub in a Rack
mounting screws.
The mounting screws are used to attach the mount-
ing ears to the hub. Once the ears are attached to
the hub, you will need to provide appropriate screws
to mount the hub in a rack.
Figure 2-1 shows the orientation of the mounting ears for attaching the
ears to the hub for a rack mount application. Mount the hub with the front
panel facing forward. Do the following:
1. Mount one of the ears to the hub using two (2) of the supplied screws.
Repeat this step for the other side of the hub.
2. Slide the hub into the rack and align the holes in the rack mounting
ears with the holes in the rack rails.
3. Insert and tighten appropriate rack-mounting screws (not provided).
4. Refer to "Connecting Hubs to the Stack’s Backplane" on page 16.
Figure 2-1. Mounting the Hub in a Rack
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Installation 15
Connecting Hubs to the Stack’s Backplane
The hub ships with a stack cable.
The hubs support a power-off bypass feature which
allows traffic to pass freely across the stack’s back-
plane, even if one or more of the hubs are powered
off.
Figure 2-2 shows how the stack cables are cascaded between the hubs
in a stack (rack). To connect up to six hubs to the backplane, plug one end
of the stack cable in the "Out" port of the top hub and the other end to the
"In" port of the next hub. Repeat this step for each hub in the stack (or
rack). Form a simple chain starting at the Out port on the first hub and
ending at the In port on the last hub.
Figure 2-2. Connecting Hubs to the Stack’s Backplane
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Installing an Optional Module into the Hub
Optional modules are available for media extension and internal switching
between repeater buses and management. These modules can be
installed into the modular slots on the left side of the hub. The Agent
Module must be installed in the lower slot, and all other modules in the
upper slot.
DO NOT install slide-in modules with the hub powered
on. Be sure you power off the hub before installing any
module.
To install an optional module into the hub, do the following:
1. Disconnect power to the hub.
2. Remove the blank metal plate (or a previously installed module) from
the appropriate slot by removing the two screws with a flat-head
screwdriver. A switch/media module can be installed in the upper slot
on the front of the hub. An Agent Module can be installed in the lower
slot on the front of the hub.
3. Before opening the package that contains the module, touch the bag
to the hub casing to discharge any potential static electricity.
4. Remove the module from the anti-static shielded bag.
5. Holding the module level, guide it into the carrier rails on each side
and gently push it all the way into the slot, ensuring that it firmly
engages with the connector.
Figure 2-3. Installing an Optional Module into the Hub
6. If you are sure the module is properly mated with the connector,
tighten the retainer screws by hand to secure the module in the slot.
7. Connect power to the hub.
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Installation 17
Using a Switch/Media Module
The 10 and 100 Mbps repeater buses in the hub can be linked together by
installing an optional switch/media module in the upper slot on the front panel.
The switch/media module is used when traffic must be passed to a destination
in the other segment, when broadcast traffic is sent, or when the destination
is unknown. The switch/media module passes traffic between the source and
destination segment at full duplex, using store-and-forward processing.
Multiple switch/media modules may be installed in a stack, but only one of the
modules will actively bridge the 10/100 Mbps repeater buses. If the active
switch/media module fails, it must be removed from the hub to activate the
standby module.
Table 2-1. Optional Modules
Part Number
Functions
Description
ELH-ULSW-TX
10Base-T/
100Base-TX,
plus internal
switching
Single-port RJ-45 uplink module using MDI-X and
MDI connectors, with internal switching between
the 10 and 100 Mbps repeater buses.
ELH-ULSW-F2
ELH100-SNMP
100Base-FX-
MM, plus inter-
nal switching
2-port MultiMode (MM) fiber uplink module using
SC fiber connectors, with internal switching be-
tween the 10 and 100 Mbps repeater buses.
RMON/SNMP/
Web Manage-
ment
Agent Module used to manage the hub (or attached
stack). Includes RS-232 serial port for console con-
nection. One backup agent module can be in-
stalled in the stack.
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Connecting a Terminal to the Console Port
The console port is a serial RS-232 interface port that enables a
connection to a terminal for performing hub monitoring and configuration
functions. The terminal may be a PC or workstation running terminal
emulation software, or a terminal configured as a Data Terminal
Equipment (DTE) connection. Alternatively, this port can be connected to
an external modem to enable remote dial-in management. You can use
the out-of-band management program (described in the next chapter)
over a standard modem connection. Or, by running SLIP protocol over a
modem connection, you can use in-band management applications such
as the Web agent embedded in the Agent Module or third-party SNMP
network management software.
If you connect a terminal to the console port prior to powering on the hub,
you can observe the progress and results of the power-up diagnostics as
the hub goes through its initialization process.
The console port connector is configured as a male null modem
connection using a male DB-9 (see Table A-1 for pinouts). A standard
straight-through wired RS-232 cable is supplied with the Agent Module for
connecting to this interface. This cable is shielded to comply with
emissions regulations and requirements.
Console Port (Out-of-Band) Connections
To connect the ELH100-12/24TX console port to a terminal, do the
following:
1. Connect a VT100 compatible terminal or a PC running a terminal
emulation program to the console port (Figure 2-4). Use the null-
modem cable provided with the Agent Module, or use a null modem
connection that complies with the wiring assignments shown in
Appendix A.
Figure 2-4. Connecting a Terminal to the Console Port
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Installation 19
2. Connect one end of the interface cable directly to the Agent Module’s
console port and tighten the retaining screws.
3. Connect the other end of the interface cable to a terminal (in some
instances, an adapter may be required to make this connection).
4. From your terminal, start the terminal emulation program.
5. Configure the terminal to the following communication settings:
VT100 emulation, 9600 baud, no parity, 8 data bits, 1 stop bit, no flow
control, ASCII character set.
Remote Management via the Console Port
Configure the Hub Site - Connect the Agent Module’s DB-9 serial port
to the modem’s serial port using standard cabling. For most modems
using a 25-pin port, you will have to provide an RS-232 cable with a 9-pin
connector on one end and a 25-pin connection on the other end. You do
not have to set the modem at the hub’s site, because the hub will
automatically configure it to auto-answer mode.
Configure the Remote Site - At the remote site, connect the PC’s COM
port (COM 1~4) to the modem’s serial port. Set terminal emulation type to
VT100, specify the port used by your PC (i.e., COM 1~4), then set
communications to 8 data bits, 1 stop bit, no parity, 9600 bps, and no flow
control.
In-Band Connections
Prior to accessing the Agent Module via a network connection, you must
configure it with a valid IP address, subnet mask, and default gateway
using an out-of-band connection or the BOOTP protocol.
The Agent Module will automatically issue BOOTP re-
quests if the IP address is set to "0.0.0.0". BOOTP is
disabled if a valid IP address has been set. Refer to
System Configuration Menu on page 33.
Telnet Connection - Prior to accessing the Agent Module via an in-band
Telnet connection, you must configure it with a valid IP address, subnet
mask, and default gateway using an out-of-band connection or the
BOOTP protocol. After configuring the hub’s IP parameters, you can
access the on-board configuration program from anywhere within the
attached network.
In-Band Network Connection - The on-board configuration program can
be accessed using Telnet from any computer attached to the network.
The hub and stack can also be managed by any computer using a web
browser (Internet Explorer 3.0 or above, or Netscape Navigator 3.0 or
above), or from a network computer using third-party network
management software.
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You can also make a remote network connection (via modems) to the
serial port on the Agent Module using SLIP protocol over TCP/IP. Using
this kind of connection, the system functions similar to a router, allowing
you to manage the hub or other attached devices using Telnet, a web
browser, or network management software.
Prior to accessing the hub via a SLIP connection, first
configure it with a valid SLIP IP address, subnet mask,
and default gateway.
The on-board program only provides access to basic
configuration functions. To access the full range of
SNMP management functions, you must use SNMP-
based network management software.
Agent Module
Table 2-2 provides information for the Agent Module available for the
ELH100-12/24TX.
Table 2-2. Agent Module
Part Number
Functions
Description
ELH100-SNMP
RMON/SNMP/
Web Manage-
ment
Agent Module used to manage the hub (or attached
stack). Includes RS-232 serial port for console con-
nection. One backup agent module can be in-
stalled in the stack.
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Powering the Hub
To supply power to the hub, connect the power cord to the hub and to a
grounded three-prong wall outlet (Figure 2-5). See Appendix A "Technical
Specifications" on page 91 for more information regarding specific
international power cord requirements.
Figure 2-5. Connecting the Power Cord
The PWR LED lights green (see Figure 1-1). If it does not, check to make
sure that the power cable is plugged in correctly and that the power
source is good.
When power is applied, the hub conducts a series of hardware and
software tests to verify operation. If a terminal or computer is connected
to the console port, the results of the tests are displayed on the screen. If
you want to display the results of the tests after the hub has been turned
on, turn the power to the hub off then back on.
The hub performs two basic types of tests at power-up. During this time,
all the LEDs light in sequence. These tests are:
•
Serial port
The serial console port test is the first test. If the hub fails, no further
tests are performed and the console displays no information.
•
Memory
Memory tests on the CPU RAM are performed after the serial port
test. No results are displayed on the console.
After these tests are performed, the operational software of the hub is
loaded. A series of more extensive diagnostic tests are then conducted.
The results of the tests are displayed on the terminal. If all tests pass, the
LEDs return to normal operation. When all tests are complete, the system
is functional and the user interface is ready to receive commands at the
console.
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Network Cable Requirements
Copper
Table 2-3 specifies the cable types and length constraints for the various
copper interfaces on the ELH100-12/24TX.
Table 2-3. Copper Cable Specifications
Interface Type
Cable Requirement
Maximum Length
10Base-T
Category 3 or 5 Unshielded Twisted
Pair (UTP)
100m (328 ft.)
100Base-TX
Category 5 UTP
100m (328 ft.)
Fiber
Table 2-4 specifies the fiber types, bandwidth requirements, and length
constraints for the Fast Ethernet fiber interface on the fiber optic switch/
media modules.
Table 2-4. Fast Ethernet Fiber Specifications
Interface Type
Fiber Type
Fiber Diameter
(microns)
Maximum Length (m)
100Base-FX(SC
connectors)
multi-mode
62.5
2,000m (6,560 ft.)
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Installation 23
10Base-T/100Base-TX Ports
The 10Base-T/100Base-TX ports use RJ-45 connectors. Figure 2-6
shows an RJ-45 connector being inserted into a port.
Figure 2-6. Inserting an RJ-45 Connector into a Port
The ports on the base unit are wired with the MDI-X function
connections meet the requirements of ISO 8877, specified by 10Base-T,
Section 14 of the IEEE 802.3 specification. Workstations or servers can
be connected to these ports using standard straight-through wired cables.
For connections to other hubs or switches, Port 12 (24) on the ELH100-
If an MDI port is not available on the hub, a crossover cable may be
necessary (refer to MDI/MDI-X Crossover Cable Wiring on page 94). See
Table A-2, “10Base-T/100Base-TX Pinouts,” on page 93 for 10Base-T/
100Base-TX connector pin assignments.
The 10Base-T/100Base-TX switch/media module includes one port wired
for MDI-X and one port wired for MDI. You can not use both ports on the
module at the same time.
Table 2-5 provides information for the single port 10Base-T/100Base-TX
uplink module available for the ELH100-12/24TX.
Table 2-5. 10Base-T/100Base-TX Uplink Module
Part Number
Functions
Description
ELH-ULSW-TX
10Base-T/
100Base-TX
Single port RJ-45 uplink module using MDI-X
and MDI connectors, with internal switching
between the 10 and 100 Mbps repeater buses.
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100Base-FX Fiber Ports
The 100Base-FX Fiber port uses SC connectors. Figure 2-7 shows an SC
fiber connector being inserted into a fiber port on the ELH100-12/24TX.
Figure 2-7. Inserting an SC Fiber Connector into a Fiber Port
The fiber uplink modules employed (Table 2-6) support multi-mode 62.5/
125mm fiber. The 100Base-FX ports use SC fiber connectors. The fiber
connectors are configured as a receive (RX) / transmit (TX) pair.
Table 2-6. Fiber Uplink Module
Part Number
Functions
Description
ELH-ULSW-F2
100Base-FX-MM
2-port multi-mode (MM) fiber uplink module us-
ing SC fiber connectors, with internal switching
between the 10 and 100 Mbps repeater buses.
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3. ELH100-12/24TX USER INTERFACE
Overview
Access is gained to the console menus by connecting a terminal to the
console port (with a direct cable connection or over modems), or using
Telnet to access the Agent Module over the network. These menus allow
you to reconfigure the hub, as well as to monitor the status and
performance of the hub or the attached stack. The menus have a layout
similar to the sample Main Menu shown in Figure 3-1. The information is
divided into the following parts:
•
•
•
Menu Name (includes access privileges)
Selectable Items
Screen Prompt for menu selections and entry of field parameters,
and Message Area for display of parameters or error messages.
Figure 3-1. Sample Main Menu
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User Access
Once a direct connection to the serial port or a Telnet connection is
established, the login screen for the on-board configuration program
appears. You may need to press Enter a few times to display the screen.
The default user names are “admin” and “guest,” with corresponding
default passwords “admin” and “guest.” The administrator has Read/Write
access, which allows you to read and modify hub information. The guest
has Read Only access to the management program, which allows you to
view hub information, but not modify any operating parameters.
You should define a new administrator password, record it and put it in a
safe place. From the Main Menu, select User Passwords and enter a new
password for the administrator. Passwords can consist of up to 14
alphanumeric characters and are not case sensitive.
A user is allowed three attempts to enter the correct
password; on the third failed attempt the current
connection is terminated.
To use the console menus, do the following:
1. Use the cursor keys to highlight the desired option.
If the selected item is a submenu title, the submenu is displayed
when you press the Enter key.
If the selected item is a parameter, the system displays a prompt for
the entry of a new parameter value. If the value entered is invalid, a
message displays, requesting you to enter a valid value.
Factory Defaults
Table 3-1 lists the default settings for the hub configuration parameters.
Each parameter can be changed via the console menus or Telnet.
Table 3-1. Factory Default Settings
Parameter
Default Value
BootP Enable
Yes
Yes
10
Port Enable
Screen Timeout
Send Modem Initialization String (ATQ0V0S0=1)
SNMP Public Community Name
Terminal Baud Rate
Yes
public
9600
No
Terminal Hardware Flow Control
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Main Menu
The Main Menu is the first screen seen after successfully logging in to the
system. Figure 3-3 shows the Main Menu and the accompanying table
describes the Main Menu.
Figure 3-3. Main Menu
Main Menu
=========
System Information ...
Restart Hub ...
Exit ...
Configuration Screens
=====================
System Configuration ...
SNMP Configuration ...
Hub Configuration ...
Port Configuration ...
TFTP Download ...
XMODEM Download ...
User Password ...
Console Configuration ...
Statistics Screens
==================
Hub Statistics ...
Port Statistics ...
Display or work with system information
Use <TAB> or cursor keys to move, <ENTER> to select
Selection
Description
System Information
Provides system description, including system name and other
data.
Restart Hub
Exit
Performs a software reset of the management agent for all hubs
in stack or for a selected hub by restarting the system software
and reloading certain operating parameters.
Logs out of the console interface. Once you log out, you must
enter a user name and password before you can access the
console interface again.
System Configuration
Configures IP parameters, including address, subnet mask,
gateway, SLIP IP, default bootup IP. Specifies maximum
number of Telnet sessions. Specifies the SNMP agent’s
segment.
SNMP Configuration
Hub Configuration
Configures communities and trap destinations.
Displays hardware/firmware versions for hub, isolates/attaches
hub’s repeater segments, and shows if an Agent Module or
switch/media module is installed. If an Agent Module is
installed, shows its bootup option, MAC address, hardware/
firmware versions, and the Baud rate of the serial port.
Port Configuration
TFTP Download
Disables/enables any port; and sets communication mode to 10
or 100 Mbps, or auto-sensing.
Downloads new firmware version to update the Agent Module
over the network.
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XMODEM Download
User Password
Downloads new firmware to update the Agent Module via a
console interface.
Sets Administrator and Guest names and passwords used for
system access.
Console Configuration
Hub Statistics
Sets console time-out and refresh period for displayed statistics.
Displays network performance for each hub in the stack.
Displays network performance for the selected port.
Port Statistics
System Information Menu
Use the System Information menu to display descriptive information
about the hub, or for quick system identification. Figure 3-4 shows and the
accompanying table describes the System Information menu.
Figure 3-4. System Information Menu
System Information
==================
System Desc.: Cabletron ELH100 Dual Speed Hub
Sys. Obj. ID: 1.3.6.1.4.1.52.3.9.1.10.5
Sys. Up Time: 6213437 (0 day 17 hr 15 min 34 sec)
System Name:
Contact:
Location:
Cabletron Inc., 0021-516-435-6475
<APPLY>
<OK>
<CANCEL>
Type the system name character string
Use <TAB> or cursor keys to move, <ENTER> to select,
<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character
Selection
Description
System Description
System Object ID
System hardware description.
Object identifier for the hub’s network management subsystem
as defined in MIB II.
Sys. Up Time
System Name*
Contact*
Time since the hub was powered on.
Name assigned to the hub system.
Contact person for the system.
Location*
Specifies the area or location where the system resides.
* Maximum string length is 255, but the screen only displays 44 characters. You
can use the arrow keys to browse the whole string.
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Reset
Use the Restart Hub command under the Main Menu to reset the
management agent. The reset screen includes an option to return all
configuration parameters to their factory defaults.
The hub takes approximately two minutes to restart.
There is no apparent activity during this time. You
should wait until the restart has completed.
Exit
Use the Exit command under the Main Menu to log out of the user
interface and terminate communications with the hub for the current
session. After this command is entered, system logout occurs
automatically.
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System Configuration Menu
Use the System Configuration menu to configure the Agent Module’s
Internet Protocol (IP) parameters, define the maximum number of Telnet
sessions allowed, and specify to which segment (10 Mbps or 100 Mbps)
the management agent is attached. Figure 3-5 shows and the
accompanying table describes the System Configuration Menu.
Figure 3-5. System Configuration Menu
System Configuration
===================
Parameter
------------
IP Address:
IP Subnet Mask:
IP Gateway:
Current Setting
-----------
210.68.150.225
255.255.255.0
0.0.0.0
New Setting
-----------
210.68.150.225
255.255.255.0
0.0.0.0
SLIP IP:
SLIP Subnet Mask: 0.0.0.0
SLIP Gateway: 0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
----------------------------------------
Maximum number of allowed Telnet sessions (0 - 2) : 2
Agent Ethernet Port Attached to: 100 Mb/s
<APPLY>
<OK>
<CANCEL>
Type the new IP address
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select,
<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character
Selection
Description
IP Address
IP address of the agent you are managing. Valid IP
addresses consist of four numbers (0 to 255) separated
by periods. Anything outside of this format will not be
accepted by the configuration program. If the IP
address is set to 0.0.0.0 (the default), the SNMP agent
will automatically issue BOOTP requests to a BOOTP
server to learn its IP address. BOOTP requests will be
disabled by configuring the agent with a valid IP
address.
Subnet Mask
Subnet mask of the management agent you have
selected. This mask identifies the host address bits
used for routing to specific subnets. (The default subnet
mask is 0.0.0.0.)
Default Gateway
Gateway used to pass trap messages from the
management agent to the network management
station. Note that the gateway must be defined if the
management station is located in a different IP
segment. (The default gateway is 0.0.0.0.)
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SLIP IP
IP address of the Agent Module used when accessing
the configuration program via an out-of-band SLIP
connection to the serial port.
The hub does not allow the SLIP IP address to be the
same as the IP address.
SLIP Subnet Mask
SLIP Gateway
Subnet mask for the SLIP IP address used by the Agent
Module.
SLIP gateway IP address used to pass traffic to the
network management station. Note that the gateway
must be defined if the management station is located in
a different IP segment.
Max # of allowed
Telnet sessions
The maximum number of Telnet sessions allowed to
simultaneously access the Agent Module.
Note: The maximum number of management sessions
(not necessarily Telnet sessions) is 2.
Agent Ethernet Port
Attached to
The network segment (10 Mb/s or 100 Mb/s) to which
the Agent Module is attached.
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SNMP Configuration Menu
the Simple Network Management Protocol (SNMP). The Agent Module
monitors the hardware status of the hub (or connected stack), as well as
the traffic passing through the ports. A Network Management Station
(NMS) can access this information using third-party network management
software. Access rights to the management agent are controlled by
community strings. To communicate with the management agent, the
NMS must first submit a valid community string for authentication. The
options for configuring community strings and related trap functions are
described in Figure 3-6, Figure 3-7, and Figure 3-8 and their
accompanying tables.
Figure 3-6. SNMP Configuration Menu
SNMP Configuration
==================
Transmit Authentication Failure Traps: YES
SNMP Communities ...
SNMP Trap Destinations ...
<APPLY>
<OK>
<CANCEL>
Press <ENTER> to go to the SNMP Communities Screen
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select
Selection
Description
Transmit
AuthenticationFailure
Traps
Issue a trap message whenever authentication of an
SNMP request fails. The default is to issue traps to
specified IP trap managers.
SNMP Communities
Assigns SNMP access based on specified community
strings.
SNMP Trap
Destinations
Specifies management stations that will receive
authentication failure messages or other trap
messages from the hub.
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SNMP Communities
Figure 3-7. SNMP Communities
SNMP Communities
================
Community Name
------------
1. public
Access
--------- -------
READ/WRITE Enabled
Status
2.
3.
4.
5.
<APPLY>
<OK>
<CANCEL>
Type a community name, 20 characters or less
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select,
<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character
Selection
Description
Community Name
The community name for read only SNMP access to
the device (1-10 character range; the default name is:
“public”).
Access
Status
Management access is Read Only or Read/Write.
Indicates operational status of the community as
Enabled or Disabled.
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SNMP Trap Destinations
Figure 3-8. SNMP Trap Destinations
SNMP Trap Destinations
======================
IP Address
Community Name
Status
--------
-----------
-----
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
<APPLY>
<OK>
<CANCEL>
Type an IP address for a trap destination
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select,
<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character
Selection
Description
IP Address
Community Name
Status
The IP address of the trap destination where SNMP
trap messages are forwarded.
The SNMP community name to use for traps forwarded
to the trap destination.
Indicates status of entry as Enabled or Disabled.
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Hub Configuration Menus
Use the Hub Configuration menu to configure any hub in the stack. This
menu is used to configure the selected hub, as well as the Agent Module.
Use the following menu to view a basic description of all the hubs in the
stack, including hardware and firmware version numbers, or to open a
more detailed configuration screen for a specific hub. The information
provided by these screens is described in Figure 3-9 and Figure 3-10, and
the accompanying tables.
Figure 3-9. Hub Selection Menu
Hub Configuration: Hub Selection Menu
=====================================
Hub Hardware
ID ID
-- -------
POST SYSTEM Num SNMP Switch/Media
F/W Ver F/W Ver Ports Agent Module
------ ------ ---- ---- --------- --------------
110000001CC8 1.00 1.00 12 Active ELH-ULSW-TX <DISPLAY DETAILS>
Detailed
Screen
1
<PREV_SCREEN>
Press <ENTER> to go to a more detailed screen for this hub
Use <TAB> or cursor keys to move, <ENTER> to select
Selection
Description
Hub ID
Hub identifier in stack. (Up to 6 hubs may be connected via
the stack cable.)
Hardware ID
Hardware version number of the repeater board.
Post Firmware Version
Version number of the repeater firmware in permanent
memory.
System Firmware Version
Version number of the repeater firmware in temporary
memory.
Number of Ports
SNMP Agent
Indicates whether this device has 12 or 24 repeater ports.
Indicates whether an Agent Module is installed in this hub.
Indicates which switch/media module is installed in this hub.
Switch/Media Module
Detailed Screen
Highlight “Display Details” and press <Enter> to access the
configuration parameters for the hub.
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Figure 3-10. Hub Configuration Menu
Hub Configuration
=================
Hub ID:
1
Model:
ELH100-12TX
Hardware ID: 11-00-00-00-1C-C8
10M backplane: Isolated
Number of Ports: 12
100M backplane: Isolated
SNMP Agent
==========
H/W Ver:
Status:
POST Ver:
System Ver:
Active
1.00
1.00
0
MAC Address: 00-00-1D-3F-2A-E1
Serial Port Baud Rate: 9600 Send Initialization String: NO
Serial Port Initialization String: ATQ0V0S0=1
Switch/Media Module
===================
Status: Not present
<APPLY>
<OK>
<CANCEL>
Isolate or attach the 10 Mb/s segment
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select,
<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character
Selection
Description
Hub Configuration
Hub ID
Hub identifier in stack.
Hardware ID
10M Backplane
Serial number of this hub.
Attaches/isolates hub’s 10 Mbps repeater bus from the
stack’s data channel.
Model
The model number of this hub.
# of Ports
Indicates whether this device has 12 or 24 repeater ports.
100M Backplane
Attaches/isolates hub’s 100 Mbps repeater bus from the
stack’s data channel.
SNMP Agent
Status
Indicates if an Agent Module is installed and active.
Version number of the Agent Module’s Power-on Self-test.
System firmware version.
POST Version
System Version
Serial Port Baud Rate
Rate at which data is sent between the Agent Module’s
serial port and the connected device. The supported baud
rate is 9600 bps.
Serial Port
Initialization String
The modem initialization string sent from the serial port to
the attached device.
H/W Version
MAC Address
Hardware version number of the Agent Module.
Physical address of the Agent Module.
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Serial Initialization
String
Yes, to send the initialization string to an attached modem.
No, if there is a direct connection from the serial port to a
PC.
Switch Module
Status
Indicates if a switch/media module is installed.
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Port Configuration Menu
Select Administrative Status Control from the Port Configuration screen,
then select the port group to configure, either “1 thru 12,” “13 thru 24,” or
“Switch/Media Module” (if installed). The following screens show the
configuration options.
Port Administrative Status Control Menu
Figure 3-11. Port Administrative Status Control Menu
Port Administrative Status Control (1 - 12)
===========================================
Hub ID: 1
Model: ELH100-12TX
Port Admin State Link State Auto Partitioned
--- -------- ------- -----------
Mode
---- -----------
Auto
Speed (Mb/s)
1
2
3
4
5
6
7
8
9
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
Enabled
No Link
No Link
No Link
No Link
No Link
No Link
No Link
No Link
No Link
No Link
No Link
Link
No
No
No
No
No
No
No
No
No
No
No
No
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
Auto
10 Enabled
11 Enabled
12 Enabled
100
<APPLY> <OK> <CANCEL> <PREV_SCREEN> <NEXT_SCREEN>
Use the space bar to toggle states
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select
Selection
Description
Admin State
Allows you to disable a port due to abnormal behavior such
as excessive collisions, and re-enable it after the problem
has been resolved. You may also disable a port for security
reasons.
Link State
Indicates if the port has a valid connection to an external
device.
Auto Partitioned
Mode
Indicates if the port is partitioned.
Sets the transmission speed to 10 Mbps, 100 Mbps or auto-
detection.
Speed
Indicates the transmission speed currently used by this port.
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Module Port Configuration Menu
The switch/media module configuration menu is accessible only if a
module is installed in the hub’s upper slot. The switch/media modules
have two internal ports that are connected to the hub’s internal repeater
segments. The configuration screen and options are displayed below.
Figure 3-12. Switch/Media Module Port Administrative Status Control Menu
Port Administrative Status Switch/Media Module
==============================================
Hub ID: 1
Model: ELH100-12TX
Module Type: TX 10/100 Switch/Media Module
Port Admin State Link State Duplex Speed (Mb/s)
--- --------
-------
Link
Link
----- ---------
1
2
3
Int: Enabled
Ext: Enabled
Ext: Enabled
Half
Half
Full
100
10
100
Link
<APPLY>
<OK>
<CANCEL>
Use the space bar to toggle between enabled and disabled states
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select
Selection
Description
Module Type
Port
The type of module installed in the hub.
Port identifier for the module. Ports 1 and 2 link internally to
the hubs 100 Mbps and 10 Mbps repeater segments. Port 3
is the external port on the module’s front panel.
Admin State
The module’s internal ports can be disabled to isolate the
module from the hub. You may wish to do this if the
module’s external connection is exhibiting abnormal
behavior or for security reasons.
Link State
Duplex
Indicates if the port has a valid connection.
The communication mode currently used by the port, either
half duplex or full duplex.
Speed
Indicates the transmission speed currently used by the port.
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Backup Port Control Menu
Select Backup Port Control from the Port Configuration screen to define
up to 15 master/slave port pairs. If the connection to the master port fails,
the slave port will automatically take over. For greater reliability, primary
and secondary ports should be located on different hubs. The following
screen and table show how to specify and activate port backup pairs.
Figure 3-13. Backup Port Control Menu
Backup Port Control
Index
----
1
2
3
4
5
6
7
Primary Port
---------
Secondary Port
-----------
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Status
-----
--------
Active Port
--------
---------
---------
---------
---------
---------
---------
---------
---------
---------
---------
---------
---------
---------
---------
---------
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
Hub: -- Port: --
--------
--------
--------
--------
--------
--------
--------
--------
--------
--------
--------
--------
--------
--------
8
9
10
11
12
13
14
15
<APPLY> <OK> <CANCEL>
Type the hub ID for the primary port
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select
Field
Description
Index
Identifier for up to 15 backup port pairs.
Primary Port
Hub
Pair member serving as the primary link.
Hub ID for the master port.
Port
Port identifier for the master port.
Secondary Port
Hub
Pair member serving as the backup link.
Hub ID for the slave port.
Port
Port identifier for the slave port.
Status
Each backup pair can be set to Active or Inactive.
Indicates if the primary or secondary port is handling the link.
Active Port
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TFTP Download Menu
Use the TFTP Download menu to load software updates into the hub over
the network. The download file should be an ELH100-12/24TX binary file
from Cabletron; otherwise, the agent module will not accept it. The
success of the download operation depends on the accessibility of the
TFTP server and the quality of the network connection. After downloading
new software, the agent module will automatically restart itself.
Parameters shown on this screen are indicated in the following figure and
table.
Figure 3-14. TFTP Download Menu
TFTP Download
=============
Download Server IP:
Download Mode:
10.1.4.45
Upgrade DRAM and reboot
Filename: cbt0209b.bin
<Start TFTP Download>
<APPLY>
<OK>
<CANCEL>
Enter the server's IP address
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select
Selection
Description
Download Server IP
Download Mode
IP address of a TFTP server.
You can download to permanent flash ROM or temporary
storage in RAM (for test purposes). However, if you
download to temporary memory, this firmware will be lost
upon power off.
Filename
The ELH100-12/24TX binary file to download.
Start TFTP Download
Issues request to TFTP server to download the specified file.
After the TFTP download is completed, the hub
takes approximately two minutes to restart. There is
no apparent activity during this time. You should
wait until the restart has completed.
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XMODEM Download Menu
Use the Xmodem Download command to update available software in the
hub via an out-of-band connection to the serial port on the Agent Module.
The download file should be an ELH100-12/24TX binary file from
Cabletron; otherwise, the agent module will not accept it. This command
specifies direct download from an attached device via the serial port. You
may download using any terminal emulation program that can transmit
binary files using the XModem protocol. The parameters shown in this
screen are indicated in the following figure and table.
Figure 3-15. XMODEM Download Menu
XMODEM Download
===============
Download Mode:
Upgrade DRAM and reboot
<Start XMODEM Download>
<CANCEL>
Use the space key to select DRAM or FLASH download
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select
Selection
Description
Download Mode
You can download to permanent flash ROM or temporary
storage in RAM (for test purposes). However, if you
download to temporary memory, this firmware will be lost
upon power off.
Start Xmodem
Download
Waits to receive a file sent from the attached PC running the
terminal emulation program.
To start the download process, use the XModem protocol and select the
ELH100-12/24TX binary file. Start sending the file from your computer by
using the “send” or “upload” file facility of the terminal emulation program.
The terminal emulation program will display the progress of the download
process. After downloading the new software, the agent will automatically
restart itself.
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User Password Menu
The User Password menu is used to display or modify user names and
passwords for the on-board configuration program. There are two user
types, Administrator and Guest. Only the Administrator has write access
for parameters governing the SNMP agent. You should therefore assign
a user name and password to the Administrator as soon as possible, and
store it in a safe place.
Passwords can consist of up to 14 alphanumeric characters and are not
case sensitive. The configuration program will allow a user three attempts
at entering a password before locking the user out by terminating the
current connection. If for some reason your password is lost, or you can
not gain access to the system configuration program, contact your
Cabletron distributor for assistance.
Figure 3-16. User Password Menu
Display/Change User Names and Passwords
=======================================
User Type
User Name
Password
Password Verify
-------
--------
--------
-----------
Administrator: admin
Guest: guest
**************
**************
**************
**************
<OK>
<APPLY>
<CANCEL>
Enter a user name, 1 to 14 characters
Use <TAB> or cursor keys to move, <ENTER> to select,
<Ctrl-F> to move forward a character, <Ctrl-B> to move back a character
Selection
Default
Description
Administrator
name: admin
password: admin
Administrator has access privilege of Read/Write
for all screens.
Guest
name: guest
password: guest
Guest has access privilege of Read Only for all
screens.
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Console Configuration Menu
The Console Configuration menu is used to configure the console
connected to the hub’s serial port. The console parameters are described
in the following figure and table.
Figure 3-17. Console Configuration Menu
Console Configuration
=====================
Automatic Logout Status:
Automatic Logout Delay Time:
Auto-Refresh Period:
ON
10 Minutes
30 Seconds
<APPLY>
<OK>
<CANCEL>
Use the space bar to toggle automatic logout
Use <TAB> or cursor keys to move, <SPACE> to toggle, <ENTER> to select
Selection
Description
Automatic Logout
Status
Enables/disables the logout function.
Automatic Logout
Delay Time
If no input is received from the attached device after this
interval (in minutes), the current session is closed.
Range: 0 - 99 minutes. Default is 10 minutes.
Auto-Refresh Period
Specifies the interval at which statistics are read from the
hub.
Options: 30, 60, 120, 180, 300 seconds. Default is 30
seconds.
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Hub Statistics Menu
The Hub Statistics screens display statistics for the 10 and 100 Mbps
stack segments. These values can be used to indicate the approximate
loading for each segment. You can use the Hub Statistics Overview
screen to display key statistics for all hubs in a stack or detailed statistics
for each individual hub. The Hub Statistics screens are shown in
Figure 3-18 and Figure 3-19, and described in the accompanying tables.
Figure 3-18. Hub Statistics Overview Screen
Hub Statistics Overview
=======================
10Mb/s Segments
Hub Frames
--- -------- ------- ------- ------- ------- -------
892 121329 <RESET1> <DETAIL>
Bytes
Collisions CRC Errors Tot.Errors Reset
Details
------
1
0
0
0
100Mb/s Segments
Hub Frames Bytes
--- ------- -------- ------
736685 112506135 425
Collisions CRC Errors Tot.Errors
--------
-------
1
6
620
<REFRESH STATISTICS> <AUTO-REFRESH STATISTICS> <PREVIOUS SCREEN>
Press <ENTER> to reset both 10 and 100 Mbit statistics counters for this hub
Use <TAB> or cursor keys to move, <ENTER> to select
Field
Description
Hub
Hub identifier within the stack.
Frames
Bytes
Number of frames passing through this hub.
Number of bytes passing through this hub.
Number of simultaneous node transmissions detected by this hub.
Collisions
CRC Errors
Number of Ethernet Cyclic Redundancy Check errors detected by
this hub.
Total Errors
Total number of errors, including FCS, alignment, Frames Too
Long, Short Events, Late Events, Jabber, and Data Rate
Mismatches detected on this device.
Reset
Resets the statistics counters for the hub.
Details
Highlight “Detail” and press <Enter> to display the detailed statistics
screen for the hub.
Refresh Statistics
Refresh the displayed statistics.
Auto-Refresh
Statistics
Refresh statistics at the interval specified in Console Configuration.
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Figure 3-19. Detailed Hub Statistics Screen
Hub 1 Statistics
=================
Statistic
10 Mb/s Segment
100 Mb/s Segment
------------- -------------- --------------
Readable Frames
Readable Octets
CRC Errors
Alignment Errors
Frames Too Long
Short Events
Runts
Collisions
Late Events
Data Rate Mismatch
Auto Partitions
Total Errors
433
86057
763985
116973315
0
0
0
0
0
2
0
0
0
0
6
1
0
612
3
425
1
0
1
620
<REFRESH STATISTICS> <AUTO-REFRESH STATISTICS> <RESET HUB STATISTICS>
<OVERVIEW SCREEN> <PREVIOUS HUB> <NEXT HUB>
Press <ENTER> to refresh this hub's statistics screen
Use <TAB> or cursor keys to move, <ENTER> to select
Field
Description
Readable Frames
Readable Octets
CRC Errors
Number of good frames passing through the hub.
Number of good octets passing through the hub.
Number of CRC errors detected by the hub.
The number of mis-synchronized data packets detected by the hub.
Alignment Errors
Frames Too Long
Number of times frame length has exceeded the maximum
allowable size (that is, 1518 bytes).
Short Events
Runts
Number of short fragments.
Number of fragments (that were too long to qualify as short events).
Number of simultaneous node transmissions detected by the hub.
Number of frames where a collision occurred late in the transmission.
Collisions
Late Events
Data Rate
Mismatch
Number of frames for which the data rate does not match the local
frequency.
Auto Partitions
Number of times the hub has automatically partitioned ports due to
jabber.
Total Errors
Total number of errors, including FCS, Alignment, Frames Too
Long, Short Events, Late Events, Jabber, and Data Rate
Mismatches detected on the hub.
Refresh Statistics
Refreshes the displayed statistics.
Auto-Refresh
Statistics
Refreshes statistics at the interval specified in Console
Configuration.
Reset Hub
Statistics
Resets the statistics counter for all items to zero.
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Port Statistics Menu
Use the Port Statistics screen to display key statistics for each port.
Overall statistics on the traffic passing through each port are displayed.
This information can be used to identify potential problems with the hub
(such as a faulty port).
Select the required port from the Port Statistics: Port Selection Menu. The
Port Statistics Screen is shown in Figure 3-20 and described in the
accompanying table.
Figure 3-20. Port Statistics Screen
Hub 1 Port 12 Statistics
========================
Readable Frames:
Readable Octets:
CRC Errors:
Alignment Errors:
Frames Too Long:
Short Events:
Runts:
805490
123515227
Collisions:
Late Events:
Data Rate Mismatches:
Auto Partitions:
Total Errors:
425
1
0
1
620
6
1
0
612
3
LSA Changes:
Last Source Address:00-00-E8-42-72-E4
672366
<REFRESH STATISTICS> <AUTO-REFRESH STATISTICS> <RESET COUNTERS>
<PORT SELECTION SCREEN> <PREVIOUS PORT> <NEXT PORT>
Press <ENTER> to refresh this port's statistics screen
Use <TAB> or cursor keys to move, <ENTER> to select
Field
Description
Readable Frames
Readable Octets
CRC Errors
Number of good frames received by the port.
Number of good octets received by the port.
Number of CRC errors.
Alignment Errors
For 10 Mbps ports, the counter records alignment errors (mis-
synchronized data packets). For 100 Mbps ports, the counter
records the sum of alignment errors and code errors (frames
received with rxerror signal).
Frames Too Long
Number of times frame length has exceeded the maximum
allowable size (that is, 1518 bytes).
Short Events
Runts
Number of short fragments.
Number of fragments (that were too long to qualify as short events).
Number of simultaneous node transmissions detected by this device.
Number of frames where a collision occurred late in the transmission.
Collisions
Late Events
Data Rate
Mismatches
Number of frames for which the data rate does not match the local
frequency.
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Auto Partitions
Total Errors
Number of times this port has been automatically partitioned due to
jabber.
Total number of errors, including FCS, Alignment, Frames Too
Long, Short Events, Late Events, Jabber, and Data Rate
Mismatches detected on this device.
LSA Changes
Number of times the source address has changed.
Last source address.
Last Source Addr.
Refresh Statistics
Refreshes the displayed statistics.
Auto-Refresh
Statistics
Refreshes statistics at the interval specified in Console
Configuration.
Reset Counters
Resets the statistics counter for all items to zero.
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4. CONFIGURING & MONITORING THE HUB
Common Tasks
The hub console menus allow you to modify default hub settings and
configure the hub for network management. They also allow you to
monitor hub performance and status. See Chapter 3, ELH100-12/24TX
User Interface on page 27, for an overview of the menu hierarchy and a
description of all menus. The following sections describe common tasks
in setting up and operating the ELH100-12/24TX hub using the console
menus.
To begin, set operating parameters and make sure the network
connections are correct by performing these tasks:
•
•
•
Setting password protection for the hub to prevent unauthorized
access to console menus
Assigning an IP address for the hub if you plan to manage the hub
using SNMP, or if you use Telnet to access the hub
Checking network configuration status and verifying that network
connections are correct
After the hub is installed and operating, you may want to perform any of
the following tasks:
•
•
•
Connecting via Telnet for in-band access to the console menus
Setting SNMP parameters for management access
Viewing hub statistics to monitor and evaluate hub performance and
traffic patterns on the network
•
•
•
•
Downloading a software upgrade
Configuring port operation (enable/disable or set port speed)
Setting a default gateway
Configuring BootP
Setting Password Protection
The ELH100-12/24TX hub is factory-configured with access rights to the
console menus set to READ/WRITE for the administrator, and READ-
ONLY for all others. These settings allow anyone who knows the hub’s
default user name and password to use the console menus to modify any
operational parameter. To protect the configuration of the hub from
unauthorized modification, you can change the password to the console
menus.
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To enter a password, do the following:
1. Select Password from the System Configuration Menu and press
[Enter].
2. Enter a password containing 1 to 14 alphanumeric characters.
The password is not case sensitive. For verification, you are asked to
enter your password again. If both entries agree, the new password is
stored.
If you forget your password, contact your Cabletron System Support
Representative.
You are automatically logged out from the console menus
due to inactivity based on the Automatic Logout Delay Time
setting in the Console Configuration Menu.
Assigning an IP Address
To assign an IP address to the hub, do the following:
1. Select System Configuration Menu from the Main menu.
2. Select New Setting for IP address from the menu and enter the IP
address. Select <APPLY>.
The IP address is now programmed. If necessary, select Subnet Mask
from the menu and enter the appropriate mask.
Checking Network Configuration Status
To check connection status for the network, do the following:
1. Select Port Configuration Menu from the Main Menu.
If a network cable is properly connected to a port, the Link Status for
the port reads LINK. If no cable is connected to the port, or if the cable
or port is faulty, the Link Status for the port reads NO LINK.
2. If you see NO LINK status for a connected port, plug the cable into
another port on the hub or try another cable.
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Connecting via Telnet
You can connect to the ELH100-12/24TX hub from a remote location
using the Telnet application. This application allows you to establish in-
band access to the console menus.
To connect to the ELH100-12/24TX hub via Telnet, do the following:
1. Assign an IP address using the System Configuration Menu.
2. Log in to the ELH100-12/24TX hub via Telnet using the configured IP
address.
Setting SNMP Management Access
Access to the ELH100-12/24TX hub through SNMP is controlled by
community names. The community names set for the hub must match
those used by the SNMP management station for successful
communication to occur. You can assign up to five community names to
the hub using READ/WRITE or READ ONLY access. The default
community name is “public,” and provides read/write access to the hub.
The ELH100-12/24TX hub can send SNMP messages, called traps, to
SNMP management stations when an important event occurs with the
hub. The hub allows up to 10 destinations to be configured for these trap
messages to be sent.
To configure SNMP access for the hub, do the following:
1. Select SNMP Configuration Menu from the Main Menu.
2. Select SNMP Communities from the SNMP Configuration Menu.
3. Specify a Community Name (you are permitted to enter from one to
10 characters), select the desired read/write access community
name, and set Status to Enabled.
4. Select one or more Trap Destination entries from the menu, enter the
appropriate IP addresses, and set Status to Enabled.
6. For each trap destination entered, a corresponding community name
should be entered. (This community name must be defined in the
SNMP Communities Menu.)
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Viewing Hub Statistics
To view hub statistics, do the following:
1. Select Hub Statistics from the Main Menu.
The screen lists the main statistical counts for both segments on the
hub simultaneously.
2. Select <DETAIL> from the Hub Statistics Overview screen.
The screen lists a summary of sum total statistics for all ports on the
hub.
3. Select Port Statistics from the Main Menu.
4. Enter the Hub ID and Port ID. Select <OK>.
The screen lists expanded port-level statistics for an individual port.
5. On any of the statistics screens, select <RESET COUNTERS> to
clear (zero) the displayed statistical counts and <REFRESH
STATISTICS> to refresh (update) the displayed statistical counts.
Downloading a Software Upgrade
You can upgrade the operational software in the ELH100-12/24TX hub
without physically opening the hub or being in the same location. The
software storage sector in the flash memory of the hub is
reprogrammable, allowing you to easily download software feature
enhancements and problem fixes to the hub from a local or remote
location.
Software can be downloaded to the hub in two ways:
•
Via the serial port. This procedure is an out-of-band operation that
copies the software through the serial port to the hub. This operation
takes approximately 40 minutes and requires minimal configuration.
•
Via TFTP download. This procedure uses a TFTP server connected
to the network and downloads the software using the TFTP protocol.
A TFTP download is much faster than a serial download, requiring
only a matter of minutes, and can be used to upgrade an ELH100-12/
24TX hub that is not physically proximate. The disadvantage is that
this method requires a TFTP server and additional setup.
Downloading Via the Serial Port
A serial download is the easiest method to upgrade the ELH100-12/24TX
hub software, requiring the least amount of equipment and configuration.
To download hub software via the serial port, do the following:
1. Select XMODEM Download from the Main Menu.
2. Select “Upgrade FLASH and reboot.”
3. Select <Start XMODEM Download>.
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4. When the system prompts, confirm that you want to proceed.
The following message prompt displays:
Receiving image...
5. Send the file using the XMODEM protocol from your computer
application (the procedure varies depending upon the application
used).
When the XMODEM procedure finishes, a message appears stating
that the system is initializing. The login prompt displays after the sys-
tem initializes. If the login prompt does not display, you may need to
press the Enter key several times.
Downloading Via TFTP
To perform a TFTP download, you must first configure the ELH100-12/
24TX hub. This consists of programming the hub with an IP address, if
this has not already been done, and entering the IP address of the TFTP
server and the name of the upgrade file. To program the hub IP address,
go to the TFTP Download Menu which is accessible from the Main Menu
screen.
To download hub software via TFTP, do the following:
1. Enter the Download Server IP address.
2. Set the Download Mode to “Upgrade FLASH and reboot.”
3. Enter the filename to be downloaded from the TFTP server.
Depending on the system you use as a TFTP server, you may need
to include the directory name with the filename.
4. If necessary, configure the address of an IP gateway to reach the
server from the hub using the IP Gateway field on the System
Configuration Menu.
5. Configure the TFTP server by copying the download file to the
appropriate directory and starting the server.
6. Select <Start TFTP Download> and press [Enter].
To verify that the TFTP download has been successfully completed,
note the software version level displayed on the Hub Configuration
screen accessible from the Main Menu. This number should match
the version number of the downloaded file.
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Configuring Port Operation
You can configure 10/100 ports on the base unit for operational
parameters such as enabled/disabled, and port speed or auto-sensing.
To configure port operation, do the following:
1. Select Port Configuration from the Main Menu.
2. Select Administrative Status Control from the Port Configuration
menu.
3. Select Port Group 1-12, 13-24 or Switch/Media Module.
4. Highlight any port, and select “Enabled” or “Disabled” in the Admin
State field to toggle between enabling and disabling the port(s).
5. Select “Force 10,” “Force 100” or “Auto” under the Mode field to set
the port speed to 10 Mbps, 100 Mbps or auto-detection.
The console interface can only enable/disable the
ports on switch/media modules. To configure the
speed/mode, use the 100Full/Auto toggle switch on
the 10Base-T/100Base-TX module or the Full/Half
toggle switch on the 100Base-FX module.
Spanning Tree
The Switch/Media modules do not support Spanning Tree, which is
intended to prevent network loops from forming. There is no loop
detection.
The user is cautioned to understand and avoid configurations that can
create a loop. However, if the ELH100-12/24TX is connected in a
redundant link configuration to a single device which does support
Spanning Tree, one link will be properly blocked, preventing a network
loop from forming. This method can be used to provide a standby
connection to the network backbone which will become active if the
primary link is lost.
Setting a Default Gateway
The Default Gateway parameter defines the IP address of a router or
other network device which is on the same subnet as the hub. The
gateway receives IP packets that are to be sent to another subnet.
To set a default gateway, do the following:
1. Select System Configuration Menu from the Main Menu.
3. Enter the gateway IP address under New Setting. Select <APPLY>.
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Configuring BootP
The BootP protocol allows you to automatically configure the hub’s IP
address information. Enabling this feature greatly speeds up device
configuration, especially when a large number of devices are installed.
A BootP server must be operating on the network and be properly
configured for this option to work. When this option is enabled, the hub
tries to obtain an IP address from a BootP server.
To configure BootP, do the following:
1. Select System Configuration Menu from the Main Menu.
2. Set the IP address under the New Setting field to 0.0.0.0. This
selection forces the hub to issue BootP requests when powered on.
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5. WEB-BASED MANAGEMENT
As well as the menu-driven system configuration program, the Agent
Module provides an embedded HTTP Web agent. This agent can be
accessed by any computer on the network using a standard Web browser
(Internet Explorer 3.0 or above, or Netscape Navigator 3.0 or above).
Using the Web browser management interface you can configure a hub
(or stack attached via the backplane) and view statistics to monitor
network activity. The Web interface also provides access to a range of
SNMP management functions with its MIB and RMON browser utilities.
Prior to accessing the Agent Module from a Web browser, be sure you
have first performed the following tasks:
1. Configure it with a valid IP address, subnet mask, and default
gateway using an out-of-band serial connection or BootP protocol.
2. Set user names and passwords using an out-of-band serial
connection. Access to the Web agent is controlled by the same user
names and passwords as the on-board configuration program. The
default user names are “admin” and “guest” with corresponding
default passwords of “admin” and “guest.”
Navigating the Web Browser Interface
To access the Web-browser interface you are first required to enter a user
name and password. As with the console interface program, there are two
user types, Administrator and Guest. The Administrator has Read/Write
access to all configuration parameters and statistics, while the Guest has
Read Only access.
When your Web browser connects with the Agent Module’s Web agent,
the home page is displayed.
The home page displays the Main Menu on the left-hand side of the
screen and the System Information on the right-hand side. The Main
Menu links are used to navigate to other menus and display configuration
parameters and statistical data.
Configurable parameters have a dialog box or a drop-down list. Once a
configuration change has been made on a page, be sure to click on the
“Apply” button at the bottom of the page to confirm the new setting.
Alternatively, you can click on the “Cancel” button to clear any changes
prior to pressing the “Apply” button.
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Main Menu
Menu
Description
System Information
Provides system description, including system name and other
data.
Stack Browser
MIB Browser
Provides a graphical representation of the stack, access to
SNMP agent, hub and port parameters.
Access to MIB II, Repeater MIB, Ethernet-Like MIB and
Cabletron’s private MIB parameters.
RMON Browser
Help
Access to Statistics, History, Alarm and Event groups.
Help on using the Web management interface.
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System Information
Field
Description
System Description
System Object ID
System hardware description.
Object identifier for the hub’s network management subsystem
as defined in MIB II.
Sys. Up Time
System Name*
Contact*
Time since the hub was last powered on.
Name assigned to the hub system.
Contact person for the system.
Location*
Specifies the area or location where the system resides.
Specifies services for the 7-layer network protocol.
System Services
* Maximum string length is 255, but the screen only displays 44 characters. You can
use the arrow keys to browse the whole string.
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Stack Browser
Item
Description
Stack
Displays the front panel graphic representation of all the hubs
in a stack.
Agent
Access to configuration of IP address and SLIP IP address for
the SNMP agent.
Hub
Displays hub configuration data and enables hub to be isolated
from the stack backplane.
Port
Enables configuration of port parameters, sets port security and
port backup features.
Switch Module
Access to the Switch/Media Module configuration and
statistics.
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Front Panel
Select “Stack” then “Front Panel” to display a graphic image of the hub or
attached stack.
Item
Description
[Refresh]
Immediately refreshes front panel status.
Refresh Mode Select
The scroll-down window includes options for:
“autoRefresh” of the front panel every 10 seconds, or
“manual” refresh by pressing the [Refresh] button.
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Agent Configuration
Select “Agent” then “Agent Configuration” to display IP configuration and
other information.
Item
Description
IP Address
Subnet Mask
Gateway IP
IP address of the Agent Module you are managing. Valid IP
addresses consist of four numbers, of 0 to 255, and separated
by periods. (The default address is 0.0.0.0.)
Subnet mask of the Agent Module you are managing. This
mask identifies the host address bits used for routing to specific
subnets. (The default subnet mask is 0.0.0.0.)
Gateway used to pass trap messages from the management
agent to the network management station. Note that the
gateway must be defined if the management station is located
in a different IP segment. (The default gateway is 0.0.0.0.)
SLIP IP
IP address of the Agent Module used when accessing the
configuration program via an out- of-band SLIP connection to
the serial port.
SLIP Subnet Mask
SLIP Gateway
Subnet mask for the SLIP IP address of the Agent Module.
SLIP gateway IP address used to pass traffic to the network
management station. Note that the gateway must be defined if
the management station is located in a different IP segment.
Agent Attached to
The network segment (10 Mbps or 100 Mbps) to which the
Agent Module is attached.
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Hub Configuration
Select “Hub” then “Hub Configuration” to display hardware and firmware
configuration of the hub.
Item
Description
Hub ID
Model
Hub identifier in stack.
The model number of this hub.
Hardware Version
Repeater Serial No.
System Version
POST Version
Version number of the hub hardware.
Serial number of this hub.
System firmware version.
Version number of the Agent Module’s Power-on Self-test.
Indicates if an Agent Module is installed and active.
Hardware version number of the Agent Module.
Agent Status
Agent Hardware
Version
Agent Serial No.
Agent MAC Address
Agent Baud rate
Serial number of the Agent Module.
Physical address of the active Agent Module.
Rate at which data is sent between the Agent Module’s serial
port and the connected device. The supported baud rate is
9600 bps.
Switch Module
Indicates if a switch/media module is installed.
Number of Ports
Indicates whether this device has 12 or 24 repeater ports.
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Hub Backplane
Select “Hub” then “Hub Backplane” to display information about the hub’s
connection to the stack’s backplane.
Item
Description
Hub ID
Hub identifier in the stack.
Backplane ID
The hub’s segment, 100 Mbps (1) or 10 Mbps (2). Select a
segment to display/configure in the Backplane Status field.
Backplane Status
Select to isolate or attach the hub’s repeater bus to the stack
backplane then press [Apply].
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Port Configuration
Select “Port” then “Port Configuration” to display information about the
port’s connection, or to display/configure the port’s security setting.
Item
Description
Hub ID
Port ID
Hub identifier in the stack.
Port number to configure.
Current Speed
Set Speed
Indicates the transmission speed currently used by this port.
Selects the port speed, 100 Mbps, 10 Mbps or Auto-Detected.
Admin State
Allows you to disable a port due to abnormal behavior (e.g.,
excessive collisions), then re-enable it after the problem has
been resolved. You may also disable a port for security reasons.
Link State
Indicates if the port has a valid connection to an external device.
Indicates if the port is partitioned.
Partition State
Port Security Setting
Authentication
Address
MAC address of the device authorized to access this port.
Auto-Learn Action
When active, the authorized address is copied from the device
currently attached to this port.
Auto-Learn Status
Intrusion
Displays Auto-Learn status as Inactive, Active or Learned.
One of these actions can be selected if intrusion is detected:
INACTIVE - Detection disabled.
WARNING AND DISABLE - Sends a message to Trap
Managers and disables the violated port.
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Port Backup
Select “Port” then “Port Backup” to display/configure redundant links.
Item
Description
Index
Identifier for up to 15 backup port pairs.
Primary Hub
Primary Port
Secondary Hub
Secondary Port
Action
Hub ID for the master port.
Port identifier for the master port.
Hub ID for the slave port.
Port identifier for the slave port.
Each backup pair can be set to Active or Inactive.
Status
Active is displayed if the backup port has taken over the link.
Inactive is displayed if the primary port is still handling the link.
Standby is displayed if there is no link on the primary port.
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Switch Module Statistics
Select “Switch Module” then “Switch Module Statistics” to display
statistics for the switch/media module.
Item
Description
Readable Frames
Readable Octets
FCS Errors
Number of good frames received by the port.
Number of good octets received by the port.
Number of FCS errors.
Alignment Errors
For 10 Mbps ports, the counter records alignment errors (mis-
synchronized data packets). For 100 Mbps ports, the counter
records the sum of alignment errors and code errors (frames
received with rxerror signal).
Frames Too Long
Number of times frame length has exceeded the maximum
allowable size (i.e., 1518 bytes).
Short Events
Runts
Number of short fragments.
Number of fragments (that were too long to qualify as short
events).
Collisions
Number of simultaneous node transmissions detected by this
device.
Late Events
Number of frames where a collision occurred late in the
transmission.
Data Rate Mismatches
Number of frames for which the data rate does not match the
local frequency.
Broadcast Packets
Multicast Packets
[Refresh]
Total number of broadcast packets detected.
Total number of multicast packets detected.
Immediately refreshes statistics.
Refresh Mode Select
The scroll-down window includes options for:
“autoRefresh” of the front panel every 10 seconds, or
“manual” refresh by pressing the [Refresh] button.
Values are counted from the time the Control Table entry was created.
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MIB Browser
The MIB Browser menu allows access to various MIB group data and
statistics. This guide provides only a summary of the MIBs supported by
the Agent Module. All MIB group objects are as defined by RFC 1213
(MIB II), RFC 2108 (Multi-Segment Repeater MIB), and RFC 1643
(Ethernet-Like MIB). For further information on specific MIB entries, refer
to the on-line help provided by the Web Agent.
Menu
Description
MIB II
Browse through MIB II group objects for detailed statistics,
settings and configuration options.
Repeater MIB
Cabletron MIB
Browse through Repeater MIB objects for segment, hub and
port statistics.
Cabletron’s private MIB enables configuration of Community
Names, Trap Managers and initiation of a TFTP download for
software upgrades.
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RMON Browser
The RMON Browser enables access to the RMON data groups supported
by the Agent Module. This guide only provides an outline of the menu
items available. All Statistics, History, Alarm and Event group parameters
are defined by RFC 1757 (RMON MIB). Note that the control table entries
can only be set using SNMP-based network management software.
Menu
Description
Statistics
View the data for each control table entry in the Statistics group.
For the selected entry, view numeric data or graphical pie
charts for packet size distribution and packet errors.
History
View the History control table entries and the data collected for
each entry. For the selected entry, view graphical displays of
packet rates and utilization.
Alarm
Event
View the control table entries for alarms.
View the control table entries for events and the event log.
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Ethernet Statistics
The RMON Manager collects statistics that allow you to quickly determine
how the network is performing. Select “Statistics” then “Statistics Entry” to
display Ethernet statistics.
Item
Description
Statistics Index
Data Source
Index for this item in the control table.
MIB variable that is being monitored:
1.3.6.1.2.1.2.2.1.1.4 - 100 Mbps stack backplane
1.3.6.1.2.1.2.2.1.1.5 - 10 Mbps stack backplane
1.3.6.1.2.1.2.2.1.1.6 - Stack Unit 1 100 Mbps segment
1.3.6.1.2.1.2.2.1.1.7 - Stack Unit 1 10 Mbps segment
...
1.3.6.1.2.1.2.2.1.1.16 - Stack Unit 6 100 Mbps segment
1.3.6.1.2.1.2.2.1.1.17 - Stack Unit 6 10 Mbps segment
Drop Events
Octets
Number of events detected when packets were dropped (due to
a lack of resources condition in the probe).
Total number of octets of data (including those in bad packets)
received on the network (excluding framing bits but including
FCS octets).
Packets
Displays the total count for all packets, broadcasts, multicasts,
and dropped packets.
Broadcast Packets
Multicast Packets
CRC Alignment Errors
Undersize Packets
Oversize Packets
Fragments
Number of broadcast packets.
Number of multicast packets.
Total number of packets with a CRC or alignment error.
Total number of undersize packets.
Total number of oversize packets.
Total number of packet fragments.
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Jabbers
Total number of jabber errors.
Collisions
Total number of packet collisions.
Packets 64 Octets
Number of packets less than 64 octets.
Number of packets between 64 and 127 octets.
Packets 64 to 127
Octets
Packets 128 to 255
Octets
Number of packets between 128 and 255 octets.
Number of packets between 256 and 511 octets.
Number of packets between 512 and 1023 octets.
Number of packets between 1024 and 1518 octets.
Packets 256 to 511
Octets
Packets 512 to 1023
Octets
Packets 1024 to 1518
Octets
Owner
Person who added this entry to the control table.
Indicates if this control entry has been set to valid or invalid.
Immediately refreshes the status.
Status
[Refresh]
Refresh Mode Select
The scroll-down window includes options for:
“autoRefresh” of the screen every 10 seconds, or
“manual” refresh by pressing the [Refresh] button.
Values are counted from the time the Control Table entry was created.
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Packets Pie Chart
Select “Statistics” then “Packets Pie Chart” to display the graphic
representation of packet size distribution.
Item
Description
Packets
64 Octets
64 to 127 Octets
Number of packets less than 64 octets.
Number of packets between 64 and 127 octets.
Number of packets between 128 and 255 octets.
Number of packets between 256 and 511 octets.
Number of packets between 512 and 1023 octets.
Number of packets between 1024 and 1518 octets.
Number of packets greater than 1518 octets.
Immediately refreshes the status.
128 to 255 Octets
256 to 511 Octets
512 to 1023 Octets
1024 to 1518 Octets
Residual
[Refresh]
Refresh Mode Select
The scroll-down window includes options for:
“autoRefresh” of the screen every 10 seconds, or
“manual” refresh by pressing the [Refresh] button.
Values are counted from the time the Control Table entry was created.
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Error Packets Ratio
Select “Statistics” then “Error Packets Ratio” to display the graphic
representation of the distribution of error types.
Item
Description
Broadcast Packets
Multicast Packets
CRC Align Errors
Undersize Packets
Oversize Packets
Fragments
Percentage of broadcast packet errors.
Percentage of multicast packets errors.
Percentage of CRC and alignment errors.
Percentage of undersize packets.
Percentage of oversize packets.
Percentage of fragments.
Jabbers
Percentage of jabbers.
Collisions
Percentage of collisions.
Residuals
Percentage of remaining error types.
Immediately refreshes the status.
[Refresh]
Refresh Mode Select
The scroll-down window includes options for:
“autoRefresh” of the screen every 10 seconds, or
“manual” refresh by pressing the [Refresh] button.
Values are counted from the time the Control Table entry was created.
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History Control Entry
RMON can be used to create a record of network utilization, packet types,
errors and collisions. You need a historical record of activity to track down
intermittent problems. Historical data can also be used to establish normal
baseline activity, which may reveal problems associated with high traffic
levels, broadcast storms, or other unusual events. Historical information
can also be used to predict network growth and plan for expansion before
your network becomes too overloaded. Select “History” then “History
Control Entry” to display the collection items defined in the history control
table.
Item
Description
History Index
An index that uniquely identifies an entry in the History Control
table. Each such entry defines a set of samples at a particular
interval for an interface on the device.
Data Source
MIB variable that is being monitored:
1.3.6.1.2.1.2.2.1.1.1 - Agent board 100 Mbps interface
1.3.6.1.2.1.2.2.1.1.2 - Agent board 10 Mbps interface
1.3.6.1.2.1.2.2.1.1.3 - Serial port for out-of-band connection
1.3.6.1.2.1.2.2.1.1.4 - 100 Mbps stack backplane
1.3.6.1.2.1.2.2.1.1.5 - 10 Mbps stack backplane
1.3.6.1.2.1.2.2.1.1.6 - Stack Unit 1 100 Mbps segment
1.3.6.1.2.1.2.2.1.1.7 - Stack Unit 1 10 Mbps segment
...
1.3.6.1.2.1.2.2.1.1.16 - Stack Unit 6 100 Mbps segment
1.3.6.1.2.1.2.2.1.1.17 - Stack Unit 6 10 Mbps segment
Buckets Requested
Buckets Granted
Interval
Requested number of discrete time intervals over which data is
to be saved in the part of the media-specific table associated
with this entry.
Number of discrete sampling intervals over which data shall
actually be saved in the part of the media-specific table
associated with this entry.
Interval in seconds over which the data is sampled for each
bucket in the part of the media-specific table associated with
this entry.
Owner
Status
Person who added this entry to the control table.
Indicates if this control entry has been set to valid or invalid.
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History Data Entry
Select “History” then “History Data Entry” to display the data recorded for
items in the history control table.
Item
Description
History Index
An index that uniquely identifies an entry in the History Control
table. Each such entry defines a set of samples at a particular
interval for an interface on the device.
History Indexes can include: 100 Mbps segment with samples
taken every 30 seconds, 100 Mbps segment with samples
taken every 1800 seconds, 10 Mbps segment with samples
taken every 30 seconds, or 10 Mbps segment with samples
taken every 1800 seconds.
Refresh Time Interval
Sample Index
Interval at which data displayed to the screen is refreshed.
An index that uniquely identifies the particular sample this entry
represents among all samples associated with the same history
control entry. This index starts at 1 and increases by one as
each new sample is taken.
Interval Start
Drop Events
Value of sysUpTime at the start of the interval over which this
sample was measured.
Total number of events in which packets were dropped by the
probe due to lack of resources during this sampling interval.
This number is not necessarily the number of packets dropped,
it is just the number of times this condition has been detected.
Octets
Total number of octets of data (including those in bad packets)
received on the network (excluding framing bits but including
FCS octets).
Packets
Number of packets (including bad packets) received during this
sampling interval.
Broadcast Packets
Multicast Packets
Number of good packets received during this sampling interval
that were directed to the broadcast address.
Number of good packets received during this sampling interval
that were directed to a multicast address. This number does not
include packets addressed to the broadcast address.
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CRC Alignment Errors
Number of packets received during this sampling interval that
had a length (excluding framing bits but including FCS octets)
between 64 and 1518 octets, inclusive, but had either a bad
Frame Check Sequence (FCS) with an integral number of
octets (FCS Error) or a bad FCS with a non-integral number of
octets (Alignment Error).
Undersize Packets
Oversize Packets
Fragments
Number of packets received during this sampling interval that
were less than 64 octets long (excluding framing bits but
including FCS octets) but were otherwise well formed.
Number of packets received during this sampling interval that
were longer than 1518 octets (excluding framing bits but
including FCS octets) but were otherwise well formed.
Total number of packets received during this sampling interval
that were less than 64 octets in length (excluding framing bits
but including FCS octets), had either a bad Frame Check
Sequence (FCS) with an integral number of octets (FCS Error)
or a bad FCS with a non-integral number of octets (Alignment
Error). Note that it is entirely normal for etherHistoryFragments
to increment. This is because it counts both runts (which are
normal occurrences due to collisions) and noise hits.
Jabbers
Number of packets received during this sampling interval that
were longer than 1518 octets (excluding framing bits but
including FCS octets), and had either a bad Frame Check
Sequence (FCS) with an integral number of octets (FCS Error)
or a bad FCS with a non-integral number of octets (Alignment
Error).
Collisions
Utilization
Best estimate of the total number of collisions on this Ethernet
segment during this sampling interval.
Best estimate of the mean physical layer network utilization on
this interface during this sampling interval, in hundredths of a
percent.
[Refresh]
Immediately refreshes the status.
Refresh Mode Select
The scroll-down window includes options for:
“autoRefresh” of the screen every 10 seconds, or
“manual” refresh by pressing the [Refresh] button.
Values are counted from the time the Control Table entry was created.
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Rate Bar Chart
Select “History” then “Rate Bar Chart” to display the recorded rate of
packets, broadcasts, multicasts and collisions collected for the selected
segment. The scale for the graphic display is automatically adjusted to
present the best view possible. (However, the smallest increment on the
vertical axis is limited to 0.05.).
Item
Description
History Index
Selections include: (1) 100 Mbps segment with count
incremented every 30 seconds, (2) 100 Mbps segment with
count incremented every 1800 seconds, (3) 10 Mbps segment
with count incremented every 30 seconds, (4) 10 Mbps
segment with count incremented every 1800 seconds.
Packets/sec
Rate at which packets (including bad packets) were received
during this sampling interval.
Broadcasts/sec
Multicasts/sec
Rate at which packets were received during this sampling
interval that were directed to the broadcast address.
Rate at which packets were received during this sampling
interval that were directed to a multicast address. This number
does not include packets addressed to the broadcast address.
Collisions/sec
Rate of collisions on this Ethernet segment during this sampling
interval.
[Refresh]
Immediately refreshes the status.
Refresh Mode Select
The scroll-down window includes options for:
“autoRefresh” of the screen every 10 seconds, or
“manual” refresh by pressing the [Refresh] button.
Values are counted from the time the Control Table entry was created.
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Utilization
Select “History” then “Utilization” to display the percentage of bandwidth
utilized over the sample period.
Item
Description
Utilization
Displays the bandwidth utilization for the selected segment.
History Index selections include: (1) 100 Mbps segment with
utilization incremented every 30 seconds, (2) 100 Mbps
segment with utilization incremented every 1800 seconds, (3)
10 Mbps segment with utilization incremented every 30
seconds, (4) 10 Mbps segment with packet count incremented
every 1800 seconds.
[Refresh]
Immediately refreshes the status.
Refresh Mode Select
The scroll-down window includes options for:
“autoRefresh” of the screen every 10 seconds, or
“manual” refresh by pressing the [Refresh] button.
Values are counted from the time the Control Table entry was created.
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Alarm
The Alarm and Event Groups allow you to record important events or
immediately respond to critical network problems. The Alarm and Event
Control Tables are used together to define specific criteria that will
generate response events. Remember that the Web Agent can only
display control entries. To define a specific entry, you must use third-party
network management software. Select “Alarm” then “Alarm Entry” to
display the items listed in the control table for monitoring.
Item
Description
Alarm Index
An index that uniquely identifies an entry in the alarm table.
Each such entry defines a diagnostic sample at a particular
interval for an object on the device.
Interval
Interval in seconds over which the data is sampled and
compared with the rising and falling thresholds.
Variable
Object identifier of the particular variable to be sampled.
Sample Type
Method of sampling the selected variable and calculating the
value to be compared against the thresholds. If the value of this
object is absoluteValue(1), the value of the selected variable
will be compared directly with the thresholds at the end of the
sampling interval. If the value of this object is deltaValue(2), the
value of the selected variable at the last sample will be
subtracted from the current value, and the difference compared
with the thresholds.
Value
Value of the statistic during the last sampling period.
Startup Alarm
If the first sample (after this entry becomes valid) is greater than
or equal to the risingThreshold AND alarmStartupAlarm is
equal to risingAlarm(1) or risingOrFallingAlarm(3), then a single
rising alarm will be generated. If the first sample (after this entry
becomes valid) is less than or equal to the fallingThreshold
AND alarmStartupAlarm is equal to fallingAlarm(2) or
risingOrFallingAlarm(3), then a single falling alarm will be
generated.
Rising Threshold
When the current sampled value is greater than or equal to this
threshold, and the value at the last sampling interval was less
than this threshold, a single event will be generated. A single
event will also be generated if the first sample after this entry
becomes valid is greater than or equal to this threshold and the
associated alarmStartupAlarm is equal to risingAlarm(1) or
risingOrFallingAlarm(3). After a rising event is generated,
another such event will not be generated until the sampled
value falls below this threshold and reaches the
alarmFallingThreshold.
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Falling Threshold
When the current sampled value is less than or equal to this
threshold, and the value at the last sampling interval was
greater than this threshold, a single event will be generated. A
single event will also be generated if the first sample after this
entry becomes valid is less than or equal to this threshold and
the associated alarmStartupAlarm is equal to fallingAlarm(2) or
risingOrFallingAlarm(3). After a falling event is generated,
another such event will not be generated until the sampled
value rises above this threshold and reaches the
alarmRisingThreshold.
Rising Event Index
Falling Event Index
Index of the eventEntry that is used when a rising threshold is
crossed. If this value is zero, no associated event will be
generated.
Index of the eventEntry that is used when a falling threshold is
crossed. If this value is zero, no associated event will be
generated.
Owner
Status
Entity that configured this entry and is therefore using the
resources assigned to it.
Status of this alarm entry.
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Event Table
Select “Event” then “Event Table” to display the action to take when an
alarm is triggered. The response to an alarm can include logging the
alarm in a database or sending a message to a trap manager.
Item
Description
Event Index
An index that uniquely identifies an entry in the event table.
Each such entry defines one event that is to be generated when
the appropriate conditions occur.
Description
Type
A comment describing this event entry.
Type of notification that the probe will make about this event.
Community
If an SNMP trap is to be sent, it will be sent to the SNMP
community specified by this string.
Last Time Sent
Value of sysUpTime at the time this event entry last generated
an event. If this entry has not generated any events, this value
will be zero.
Owner
Status
Entity that configured this entry and is therefore using the
resources assigned to it.
Status of this event entry.
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Log Table
Select “Event” then “Log Table” to display each time an event was
triggered. Note that there are no display windows associated with the
Alarm and Event groups other than the control and log tables.
Item
Description
Event Index
Event entry that generated this log entry.
Refresh Time Interval
Log Index
Interval at which data displayed to the screen is refreshed.
An index that uniquely identifies an entry in the log table
amongst those generated by the same eventEntries.
Time
Value of sysUpTime when this log entry was created.
Description
An implementation dependent description of the event that
activated this log entry.
[Refresh]
Immediately refreshes the status.
Refresh Mode Select
The scroll-down window includes options for:
“autoRefresh” of the screen every 10 seconds, or
“manual” refresh by pressing the [Refresh] button.
Values are counted from the time the Control Table entry was created.
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6. SNMP MANAGEMENT
The SNMP Protocol
SNMP (Simple Network Management Protocol) is a communication
protocol designed specifically for the purpose of managing devices or
other elements on a network. Network equipment commonly managed
with SNMP includes hubs, switches, routers, and host computers. SNMP
is typically used to configure these types of devices for proper operation
in their network environment, as well as to monitor them to evaluate their
performance and detect potential problems.
Managed entities supporting SNMP typically contain software, which runs
locally on the device and is referred to as an agent. In Figure 6-1, software
in an ELH100-24TX hub functions as an agent, monitoring and controlling
the functionality of the hub.
Figure 6-1. ELH100-12/24TX Hubs Managed by an
SNMP Management Workstation
A defined set of variables, referred to as managed objects, is maintained
by the agent and used to manage the device. These objects are defined
in a Management Information Base (MIB) which allows for a standard
presentation of the information controlled by the agent over the network.
The software used to access the information maintained by the SNMP
agents across a network is referred to as the SNMP Manager, and
typically runs on a workstation.
The SNMP manager software uses a MIB specification, equivalent to that
which the agent maintains, to read and write objects controlled by the
agent for purposes of configuring and monitoring the device. SNMP
defines the format of the MIB specifications and the protocol used to
access this information.
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There are three main operations defined in SNMP:
•
•
GET operations read information from the managed device, such as
those used to obtain status or statistical data.
SET operations change a functional parameter on the device, such
as those used to configure Port Speed or to initiate a software
download. GET and SET operations are initiated only by the
manager software, and result in a response by the agent.
•
TRAP operations allow the agent to send an unsolicited message to
the manager. This operation is typically used as an alert of a potential
problem or a change of status with the device. The Trap Destination
parameter in the SNMP Configuration Menu is used to configure the
IP addresses of the SNMP Manager to which ELH100-12/24TX trap
messages are sent.
MIB Objects
A number of standard MIB specifications have been defined for managing
network equipment. SNMP compliant devices typically support one or
more standard MIBs defined by the Internet Engineering Task Force
(IETF), in the form of Request for Comments (RFC) documents.
These MIBs provide a common method of managing devices, such as
hubs and switches, and network interfaces, such as Ethernet and token
ring. The primary standard MIB, referred to as MIB-II, provides an overall
view of the managed agent and must be supported, at least in part, by all
SNMP agents. In addition, proprietary MIB extensions are defined by
commercial vendors for managing device-specific functions of their
products.
The ELH100-12/24TX hub supports four standard MIBs:
•
RFC 1213 - Management Information Base for Network
Management of TCP/IP based Internets (MIB-II)
•
•
•
RFC 2108 - Multi-segment Repeater Management Information Base
RFC 1643 - Ethernet-like Management Information Base
RFC 1757 - Remote Network Monitoring Management Information
Base
The ELH100-12/24TX hub also supports Cabletron proprietary MIB
extensions.
RFC 1213 (MIB-II)
RFC 1213 provides management of system-level parameters, including
TCP/IP protocol-related statistics, IP addressing, and interface statistics
for each hub port. MIB-II is the standard MIB defined by RFC 1213. All
agent devices operating SNMP are required to support at least part of
MIB-II.
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This MIB reports information about the protocols and network interfaces
supported on the agent itself, as well as other general information. The
MIB is divided into a number of groups, each of which corresponds to a
specific protocol or set of information. Some groups are defined in other
RFC documents.
The groups specifically defined in RFC 1213 and supported by the
ELH100-12/24TX hub system software are as follows:
•
•
•
System – General information about the agent system
Interfaces – Information about the network interfaces of the system
Address Translation – Interface address information, both MAC level
and network (IP) level
•
•
•
•
•
IP – Statistics and information related to the IP protocol
ICMP – Statistics and information related to the ICMP protocol
TCP – Statistics and information related to the TCP protocol
UDP – Statistics and information related to the UDP protocol
Transmission – Statistics and information related to the physical
network medium to which the system interfaces (e.g. Ethernet, token
ring, etc.).
•
SNMP – Statistics and information related to the SNMP protocol
RFC 2108 (Multi-segment Repeater)
RFC 2108 provides management and monitoring for multi-segment
repeaters. This group provides a set of managed objects for devices
(repeaters, MAUs, interfaces) that conform to the IEEE 802.3 standard for
Ethernet.
RFC 1643 (Ethernet-like)
RFC 1643 provides management and monitoring for the Ethernet-specific
aspects of each segment on the hub. Instances of these object types
represent attributes of an interface to an Ethernet-like communications
medium.
RFC 1757 (RMON MIB)
RFC 1757 is a group defined under MIB-II. This MIB provides
management for the RMON aspects of the hub. The ELH100-12/24TX
hub supports four of the nine groups of RMON defined for Ethernet
networks on a per segment basis. For further information, see the
subsection “RMON” in Chapter 1 or “RMON Browser” in Chapter 5.
Cabletron Proprietary MIB Extensions
Areas of ELH100-12/24TX hub functionality not covered by the standard
RFC MIBs are specified in the Cabletron private MIB. This MIB definition
is specified separately from MIB-II. Areas covered in this MIB include
various system, hub, and port level information.
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Compiling MIB Extensions: Cabletron Website
The MIBs supported by the ELH100-12/24TX hub must be compiled into
the SNMP network management platform before the hub can be
managed. The supported MIBs are available using Cabletron’s website
at:
http://www.cabletron.com
The four standard MIB specifications listed above with which the
ELH100-12/24TX hub is compliant are generally available with the SNMP
management platform.
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APPENDIX A. TECHNICAL SPECIFICATIONS
General
Standards Compliance
IEEE 802.2 Local Area Networks, Logical Link Control (LLC)
IEEE 802.3 CSMA/CD 9 (ISO/IEC 8802-3)
IEEE 802.3i 10Base-T (ISO/IEC 8802-3, clause 14)
IEEE 802.3u 100Base-TX (ISO/IEC 8802-3, clause 25)
IEEE 802.3u 100Base-FX (ISO/IEC 8802-3, clause 26)
EIA RS-232C (DTE-to-DCE)
EIA RS-310C (19-inch rackmount)
Certification
Emissions: FCC Part 15, Subpart B, Class A; EN55022 (CISPR 22),
Class A; VCCI Class A
Safety: CSA/NRTL (C22.2.950,UL1950); IEC 950 (TUV)
CE Directives: 89/336/EEC; 93/68/EEC; 73/23/EEC
Data Rate
10 Mbps Manchester encoded, 100 Mbps 4B/5B encoded.
Environmental Specifications
Operating temperature:
Operating humidity:
Storage temperature:
Storage humidity:
32° to 104° F (0° C to 40° C)
5 to 95% relative, non-condensing
-40° to 158°F (-40° C to 70° C)
5 to 95% relative, non-condensing
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Electrical Specifications
Input voltage:
100-240 VAC
50-60 Hz
50 VA
Input frequency:
Maximum power consumption:
Physical
Height:
Length:
Width:
2.5 in. (6.3 cm)
7.9 in. (20 cm)
17.3 in. (44 cm mountable in a
standard 19 in. rack)
Weight:
9.92 lb. (4.5 kg)
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Port Specifications
Console Port
Table A-1 shows the console port pin assignments.
Table A-1. RS-232 Console Port Pin Assignments
Pin
1
Signal Name
DCD
2
RXD
3
TXD
4
DTR
5
Ground
DSR
6
7
RTS
8
CTS
9
RI
10Base-T and 100Base-TX Ports
Table A-2 shows the 10Base-T/100Base-TX pinouts. These ports are
wired MDI-X. All undefined pins are not used.
Table A-2. 10Base-T/100Base-TX Pinouts
Pin
1
MDI-X Signal Name
RD+
RD-
TD+
TD-
2
3
6
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MDI/MDI-X Crossover Cable Wiring
Figure A-1 shows the wiring scheme for implementing a crossover cable
if needed for connection to the hub’s 10Base-T or 100Base-TX ports.
Such a cable may be required when connecting the hub to another hub or
a switch device.
Figure A-1. External Crossover Cable Wiring
Power Cord Set Requirements
The wide-range input feature of the ELH100-12/24TX Ethernet hub
permits it to operate from any line voltage between 100 and 240 VAC.
The power cord set (appliance coupler, flexible cord, and wall plug) you
received with the hub meets the requirements for use in the country where
you purchased the hub.
Power cord sets for use in other countries must meet the requirements of
the country where you use the hub. For more information on power cord
set requirements, contact your Cabletron System Support
Representative.
General Requirements
The requirements listed below are applicable to all countries:
•
The length of the power cord set must be at least 5.00 feet (1.5 m)
and a maximum of 6.56 feet (2.0 m).
•
All power cord sets must be approved by an acceptable accredited
agency responsible for evaluation in the country where the power
cord set will be used.
•
•
The power cord set must have a minimum current capacity of 10A
and a nominal voltage rating of 125 or 250 VAC, as required by each
country’s power system.
The appliance coupler must meet the mechanical configuration of an
EN 60 320/IEC 320 Standard Sheet C13 connector for mating with
appliance inlet on the hub.
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Country-Specific Requirements
Table A-3 lists the power cord set requirements by country and identifies
the accredited agency within that country.
Table A-3. Power Cord Set Requirements by Country
Country
Australia
Austria
Accredited Agency
EANSW
OVE
See Notes *
1
1
1
2
1
1
1
1
1
3
1
1
1
1
1
2
Belgium
CEBC
CSA
Canada
Denmark
Finland
DEMKO
FIMKO
UTE
France
Germany
Italy
VDE
IMQ
Japan
JIS
Netherlands
Norway
KEMA
NEMKO
SEMKO
SEV
Sweden
Switzerland
United Kingdom
United States
BSI
UL
* The note column includes a number. Associate this num-
ber with the corresponding notes listed after the table to ob-
tain specific power standards and requirements.
Note 1
Flexible cord must be <HAR> Type HO5VV-F or HO3VV-F, 3-conductor,
1.0 mm2, or 0.75 mm2 conductor size. Power cord set fittings (appliance
coupler and wall plug) must bear the certification mark of the agency
responsible for evaluation in the country where it will be used.
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Note 2
Flexible cord must be Type SV, SJ, SPT or equivalent, No. 18 AWG, 3-
conductor. Wall plug must be a two-pole grounding type with a NEMA 5-
15P (15A, 125V) or NEMA 6-15P (15A 250V) configuration.
Note 3
Appliance coupler, flexible cord, and wall plug must bear a “T” mark and
registration number in accordance with the Japanese Dentori Law.
2
Flexible cord must be Type VCT or VCTF, 3-conductor, 0.75mm
conductor size. Wall plug must be a two-pole grounding type with a
Japanese Industrial Standard C8303 (15A, 125V) configuration.
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APPENDIX B. ACRONYMS & ABBREVIATIONS
Term
Definition
10Base-T
100Base-TX
100Base-FX
ANSI
10 Mbps twisted-pair Ethernet
100 Mbps twisted-pair Fast Ethernet
100 Mbps fiber option Fast Ethernet
American National Standards Institute
Bootstrap Protocol
BootP
CAT5
Category 5
CRC
Cyclic Redundancy Check
CSMA/CD
Carrier Sense Multiple Access/Collision
Detection
DCE
DSR
DTE
DTR
FCS
ICMP
IEEE
IP
Data Communications Equipment (modem)
Data Send Ready
Data Terminal Equipment
Data Terminal Ready
Frame Check Sequence
Internet Control Message Protocol
Institute of Electrical and Electronics Engineers
Internet Protocol
LAN
Local Area Network
MAC
LED
Media Access Control
Light Emitting Diode
MDI
Media Device Interface
MIB
Management Information Base
Request for Comment
RFC
RMON
RXD
SNMP
TCP/IP
Remote Monitoring
Receive Data
Simple Network Management Protocol
Transmission Control Protocol/Internet
Protocol
TFTP
TXD
UTP
Trivial File Transfer Protocol
Transmit Data
Unshielded Twisted Pair
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INDEX
connecting to, 19
pin assignments, 93
crossover cable, 24
100Base-FX
fiber ports, 25
module defined, 5
100M LED, defined, 6
10Base-T/100Base-TX
module defined, 5
pinouts, 93
ports, 24
802.2, 91
802.3, 24, 91
802.3i, 91
802.3u, 91
Data Rate, 91
Default Gateway, setting, 58
via the serial port, 56
DTE connection, 19
Dual-Speed Architecture, 7
A
Activity LED, defined, 6
Agent Configuration
Web interface, 66
Agent Module
description, 21
architecture
dual-speed hub, 2
internal switch, 3
Auto-negotiation, 9
Electrical Specifications, 92
Error Packets Ratio, 77
B
Backup Port Control Menu, 43
bandwidth utilization, 82
BootP, 10
BootP/DHCP
configuring, 59
Web interface, 65
Full/Half LED, defined, 6
C
cable, RS-232, 19
certification, 91
H
Collision LED, defined, 6
communication settings, 20
community names, 55
Configuration and Management
Interfaces, 8
History Control Entry, 78
History Data Entry, 79
Hub Backplane
Web interface, 68
Hub Configuration
Menu, 38
Web interface, 67
hub statistics, 56
screen, 48
configuring the hub
common tasks, 53
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password
menu, 46
I
in-band
Port Configuration
Menu, 41
configuration, 8
connection, 20
inspecting your shipment, 13
installing an optional module, 17
IP address, assigning, 54
Web interface, 69
L
LED indicators, 3, 4, 6
Link LED, defined, 6
logout, 32
country-specific requirements, 95
M
Main Menu, 27, 30
Web interface, 62
MDI, 24
MDI/MDI-X Crossover Cable Wiring, 94
MDI-X, 24
defined, 4
menu hierarchy, 29
MIB, 87, 88
compiling extensions, 90
Ethernet-like, 89
Multi-segment, 89
Proprietary, 89
R
rear panel, 7
redundant power connector, defined, 7
Remote Monitoring, 9
reset, 30, 32
RMON, 89
MIB Browser
Web interface, 72
MIB-II, 88
modem connection, configuring, 20
Module Port Configuration Menu, 42
mounting ears, 15
mounting the switch
rack, 15
ports, 4
ports defined, 4
RMON, 9
Event, 73
Event Table, 85
History, 73
History Data Entry, 79
Log Table, 86
Packets Pie Chart, 76
Rate Bar Chart, 81
Statistics, 73, 74
Utilization, 82
N
network
configuration status, 54
management, 3
non-volatile parameter storage, 8
O
optional modules, 2, 5
out-of-band configuration, 8
RMON Browser
Web interface, 73
router, 87
P
Packets Pie Chart, 76
RS-232 connection, 8
2 Index
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S
screen timeout, 54
segment LEDs, 4
defined, 4
Serial port, 8
site requirements, 13
SNMP, 8, 36, 55, 87, 88, 90
Communities, 36
Configuration Menu, 35
setting access, 55
Unshielded Twisted Pair (UTP), 23
user access, 28
Trap Destinations, 37
SNMP-based network manager, 8
Spanning Tree, 58
stack cable, 16
Stack Connectors, defined, 7
Standards Compliance, IEEE, 91
switch LED, 4
ventilation, 13
defined, 4
Switch Module Statistics
Web interface, 71
Switch/Media Module
how to use, 18
System Configuration Menu, 33
System Information
Menu, 31
W
Web browser, 8
management, 61
network manager, 8
X
Web interface, 63
XMODEM Download Menu, 45
T
TCP/IP protocol, 8
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