SEHI100TX-22 100BASE-T
INTELLIGENT STACKABLE HUB
USER’S GUIDE
®
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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.
DOC 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 equipment is in the 1st Class Category (information equipment to be used in commercial and/or
industrial areas) and conforms to the standards set by the Voluntary Control Council for Interference
by Information Technology Equipment (VCCI) aimed at preventing radio interference in commercial
and/or industrial areas.
Consequently, when used in a residential area or in an adjacent area thereto, radio interference may be
caused to radios and TV receivers, etc.
Read the instructions for correct handling.
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Notice
CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT
IMPORTANT: Before utilizing this product, carefully read this License Agreement.
This document is an 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 (the
“Program”) contained in this package. The Program may be contained in firmware, chips or other
media. BY 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, PROMPTLY RETURN THE UNUSED
PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND.
CABLETRON SOFTWARE PROGRAM LICENSE
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.
3.
OTHER RESTRICTIONS. You may not reverse engineer, decompile, or disassemble the
Program.
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.
EXCLUSION OF WARRANTY AND DISCLAIMER OF LIABILITY
1.
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 EXPRESSED 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.
2.
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
ON THE DURATION OR LIMITATION OF IMPLIED WARRANTIES, IN SOME
INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO
YOU.
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Notice
UNITED STATES GOVERNMENT RESTRICTED RIGHTS
The enclosed product (a) was developed solely at private expense; (b) contains “restricted computer
software” submitted with restricted rights in accordance with Section 52227-19 (a) through (d) of the
Commercial Computer Software - Restricted Rights Clause and its successors, and (c) in all respects
is proprietary data belonging to Cabletron and/or its suppliers.
For Department of Defense units, the product is licensed with “Restricted Rights” as defined in the
DoD Supplement to the Federal Acquisition Regulations, Section 52.227-7013 (c) (1) (ii) and its
successors, and use, duplication, disclosure by the Government is subject to restrictions as set forth in
subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at
252.227-7013. Cabletron Systems, Inc., 35 Industrial Way, Rochester, New Hampshire 03867-0505.
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CONTENTS
CHAPTER 1
INTRODUCTION
1.1 Using This Manual....................................................................... 1-1
1.2 Document Conventions ............................................................... 1-2
1.3 Getting Help................................................................................. 1-3
1.4 Related Manuals.......................................................................... 1-3
CHAPTER 2
SEHI FEATURES AND OPTIONS
2.1 SEHI Overview ............................................................................ 2-1
2.2 SEHI Features............................................................................. 2-2
2.3 Stackable Capabilities ................................................................. 2-3
2.4 Rack Mounting Capabilities......................................................... 2-4
2.5 Remote Network Management.................................................... 2-4
2.6 Optional 100BASE-TX and 100BASE-FX EPIMs........................ 2-4
CHAPTER 3
INSTALLATION REQUIREMENTS
AND SPECIFICATIONS
3.1 Cable Specifications.................................................................... 3-1
3.1.1 HubSTACK Interconnect Cable Requirements............... 3-1
3.1.2 UTP Cable Specifications............................................... 3-2
3.1.3 Multimode Specifications for the EPIM-100FX ............... 3-3
3.2 Network Cable Lengths ............................................................... 3-4
3.3 Network Port Specifications......................................................... 3-5
3.4 COM Port Requirements ............................................................. 3-5
3.5 Operating Specifications.............................................................. 3-6
3.5.1 Power Supply Requirements .......................................... 3-6
3.5.2 Environmental Requirements ......................................... 3-6
3.6 Agency Approvals........................................................................ 3-7
3.7 Physical Specifications................................................................ 3-7
CHAPTER 4
INSTALLATION
4.1 Unpacking the SEHI .................................................................... 4-1
4.2 Pre-Installation Checkout ............................................................ 4-2
4.3 Tabletop or Shelf Installation....................................................... 4-3
4.4 Rackmount Installation ................................................................ 4-4
4.5 Powering Up and Stacking the SEHI........................................... 4-7
4.6 Installing the EPIM-100TX or the EPIM-100FX........................... 4-9
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Contents
CHAPTER 5
CONNECTING TO THE NETWORK
5.1 Connecting the SEHI to the Network ...........................................5-1
5.1.1 Connecting to Network Ports...........................................5-1
5.1.2 Connecting a UTP Segment to an EPIM-100TX.............5-2
5.1.3 Connecting a Fiber Segment to the EPIM-100FX...........5-4
5.2 Testing the Installation.................................................................5-5
CHAPTER 6
TROUBLESHOOTING
6.1 Installation Test............................................................................6-1
6.2 Using LANVIEW...........................................................................6-2
6.3 Using the RESET Button .............................................................6-4
6.4 Setting the NVRAM Switch ..........................................................6-5
CHAPTER 7
LOCAL MANAGEMENT
7.1 Local Management Keyboard Conventions.................................7-2
7.2 Management Terminal Setup.......................................................7-3
7.3 Accessing Local Management.....................................................7-6
7.4 The Feature Selection Screen .....................................................7-7
7.5 The Community Name Table Screen...........................................7-8
7.5.1 Editing the Community Name Field.................................7-9
7.6 The Configuration Screen..........................................................7-10
7.6.1 Setting the IP Address...................................................7-12
7.6.2 Setting the Subnet Mask ...............................................7-12
7.6.3 Setting the Default Gateway..........................................7-13
7.6.4 Using the Port Enable Override.....................................7-13
7.6.5 Exiting the Configuration Screen...................................7-14
7.7 The Trap Table Screen..............................................................7-14
7.7.1 Configuring the Trap Table............................................7-15
7.7.2 Exiting the Trap Table Screen.......................................7-15
7.8 The SNMP Tools Screen ...........................................................7-16
7.8.1 Getting Individual OIDs .................................................7-18
7.8.2 Getting the Next OID.....................................................7-18
7.8.3 Setting an OID...............................................................7-18
7.8.4 Viewing Multiple OIDs ...................................................7-19
7.8.5 Walking Through OIDs..................................................7-19
7.8.6 Stepping Through OIDs.................................................7-20
7.8.7 Cycling Through OIDs...................................................7-20
7.8.8 Exiting the SNMP Tools Screen....................................7-20
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Contents
7.9 The Device Statistics Screen..................................................... 7-21
7.9.1 Selecting the Appropriate Module/Port......................... 7-23
7.9.2 Using the ENABLE PORT Command........................... 7-24
7.9.3 Using the DISABLE PORT Command.......................... 7-24
7.9.4 Exiting the Device Statistics Screen ............................. 7-24
APPENDIX A EPIM SPECIFICATIONS
A.1 EPIM Specifications.....................................................................A-1
A.1.1 EPIM-100TX....................................................................A-1
A.1.2 EPIM-100FX....................................................................A-2
APPENDIX B IMAGE FILE DOWNLOAD USING OIDS
B.1 Setting Up a UNIX Workstation as a TFTP Server......................B-2
B.2 Standard Local Download ...........................................................B-3
INDEX
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CHAPTER 1
INTRODUCTION
Welcome to the Cabletron Systems SEHI100TX-22 100BASE-T
Intelligent Stackable Hub User’s Guide. This manual provides
installation instructions, troubleshooting, and reference information for
the SEHI100TX-22.
The term SEHI (Stackable Ethernet Hub with Intelligence) is
used throughout this manual when describing the features and
NOTE
functions of the SEHI100TX-22.
1.1
USING THIS MANUAL
Read through this manual to gain an understanding of the features and
capabilities of the SEHI. A general knowledge of Ethernet and IEEE
802.3u type data communications networks and their physical layer
components is helpful when installing the SEHI.
Chapter 1, Introduction, outlines the contents and describes the
objectives and conventions of this manual. This chapter also provides
getting help information and concludes with a list of related manuals.
Chapter 2, SEHI Features and Options, briefly describes SEHI features
and provides information about available options.
Chapter 3, Installation Requirements and Specifications, provides
installation requirements, network guidelines, and SEHI specifications.
Chapter 4, Installation, contains instructions for installing the SEHI as a
stackable or standalone hub.
Chapter 5, Connecting to the Network, explains how to connect the
SEHI to the network using the various media types.
Chapter 6, Troubleshooting, describes how to use the LANVIEW LEDs
to troubleshoot network problems.
Chapter 7, Local Management, describes how to use SEHI Local
Management screens and the available commands.
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Chapter 1: Introduction
Appendix A, EPIM Specifications, provides specifications, cabling
information, and switch settings for the Ethernet Port Interface Modules.
Appendix B, Image File Download Using OIDs, provides instructions
for setting up a TFTP server and downloading an image file to the SEHI
by setting specific MIB OID strings.
1.2
DOCUMENT CONVENTIONS
The following conventions are used throughout this document:
Note symbol. Calls the reader’s attention to any item of
information that may be of special importance.
NOTE
Tip symbol. Conveys helpful hints concerning procedures or
TIP
actions.
Caution symbol. Contains information essential to avoid
damage to the equipment.
!
CAUTION
Warning symbol. Warns against an action that could result in
equipment damage, personal injury or death.
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Getting Help
1.3 GETTING HELP
If you need additional support related to this device, or if you have any
questions, comments, or suggestions concerning this manual, contact
Cabletron Systems Technical Support:
By phone
(603) 332-9400
Monday – Friday; 8 A.M. – 8 P.M. Eastern Time
GO CTRON from any ! prompt
ctron.com (134.141.197.25)
anonymous
By CompuServe
By Internet mail
By FTP
Login
Password
your email address
Before calling Cabletron Systems Technical Support, have the following
information ready:
•
•
A description of the failure
A description of any action(s) already taken to resolve the problem
(e.g., changing mode switches, rebooting the unit, etc.)
•
•
•
A description of your network environment (layout, cable type, etc.)
Network load and frame size at the time of trouble (if known)
The serial and revision numbers of all Cabletron Systems products in
the network
•
The device history (i.e., have you returned the device before, is this a
recurring problem, etc.)
•
Any previous Return Material Authorization (RMA) numbers
1.4
RELATED MANUALS
Use the Cabletron Systems SEH100TX-22 100BASE-T User’s Guide to
supplement the procedures and other technical data provided in this
manual. The procedures contained in the SEH100TX-22 100BASE-T
User’s Guide are referenced where appropriate, but not repeated in this
manual.
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CHAPTER 2
SEHI FEATURES AND OPTIONS
This chapter provides an overview of the SEHI and contains sections
detailing features and available options.
The terms SEHI (Stackable Ethernet Hub with Intelligence) and
SEH (Stackable Ethernet Hub) are used throughout this
NOTE
manual when describing the features and functions of the
SEHI100TX-22 and the SEH100TX-22.
FRONT VIEW
HubSTACK 100BASE-TX HUB WITH LANVIEW®
SEHI100TX-22
RCV
LNK
A
22 21 20 19 18 17 16 15 14 13 12
22X 21X 20X 19X 18X 17X
16X 15X 14X 13X 12X
PWR
CPU
CLN
RCV
LNK
E
1
RESET
11 10
9
8
7
6
5
4
3
2
1
COM
11X 10X
9X
8X
7X
6X
5X
4X
3X
2X
1X
EPIM
1
Port Status LEDs
System LEDs
COM Port
Network Ports 1-22
EPIM Slot
RESET Button
SEHI100TX-22 100BASE-T HUB WITH LANVIEW®
OUT
SEH100TX INTERCONNECT
IN
SN
NET.
ADD.
Interconnect Bus "OUT" Port
Interconnect Bus "IN" Port
Power Supply
REAR VIEW
Figure 2-1 The SEHI100TX-22
2.1
SEHI OVERVIEW
The SEHI100TX-22 is an intelligent repeating hub providing 22 RJ45
ports and one Ethernet Port Interface Module (EPIM) port on the front
panel for network connections. The SEHI has two rear panel HubSTACK
Interconnect Bus ports for stackable connections. The SEHI100TX-22 is
designed to manage the Cabletron Systems non-intelligent stackable hub,
the SEH100TX-22.
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Chapter 2: SEHI Features and Options
The SEHI100TX-22 operates in a 100BASE-T Ethernet
network. This product will NOT operate in a 10BASE-T
environment. Connect the SEHI100TX-22 and SEH100TX-22
only to similar 100BASE-T products.
!
CAUTION
The SEHI100TX-22 supports the EPIM-100TX and the
EPIM-100FX. No other Cabletron Systems EPIMs operate in
this device.
2.2
SEHI FEATURES
Repeater Functionality
The SEHI fully conforms to the IEEE 802.3u Repeater specifications. The
SEHI transmits retimed data packets, regenerates the preamble, extends
fragments, and arbitrates collisions.
The SEHI100TX-22 meets IEEE 802.3u Repeater Class I standards.
Class I standards allow one repeater between any two Data Terminal
Equipment (DTE) devices within a single collision domain (network).
The SEHI automatically partitions problem segments, and reconnects
repaired segments to the network. This feature minimizes the impact on
network operation resulting from a problem on one segment by isolating
the problem segment. Only devices on the problem segment are affected.
When the problem is solved, the SEHI automatically reconnects the
isolated segment to the network.
Polarity Detection and Correction
Each twisted pair port on the SEHI incorporates a polarity detection and
correction feature that allows the SEHI to pass data regardless of the
polarity of the twisted pair segment’s receive link.
FLASH EEPROMs
The SEHI uses FLASH EEPROMs that allow the downloading of new
and updated firmware using Cabletron Systems SPECTRUM Element
Manager/Windows or any device using BOOTP or TFTP protocols.
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Stackable Capabilities
LANVIEW LEDs
Cabletron Systems LANVIEW status monitoring and diagnostics system
is a troubleshooting tool that helps in diagnosing power failures,
collisions, cable faults, and link problems. The LANVIEW LEDs are
conveniently located on the SEHI front panel.
RESET Button
Resetting the hub with the front panel RESET Button reboots the SEHI
and initializes the processor. Resetting the SEHI also resets all of the SEH
non-intelligent hubs in the stack.
Local Management
Manage the SEHI and its attached segments through Local Management
on the SEHI. Local Management provides full packet and error statistics
for the entire stack, individual device, or individual port. Access Local
Management by attaching a DEC VT320 terminal or a PC using VT320
emulation software to the RJ45 COM port on the SEHI. Cabletron
Systems provides a UTP console cable with RJ45 connectors at each end,
adaptors for DB9 or DB25 connections and an instruction sheet with
adaptor pinout information with the SEHI. Chapter 7, Local
Management, provides detailed information on setting up and managing
your network through Local Management.
2.3
STACKABLE CAPABILITIES
The SEHI100TX-22 intelligent hub is designed to manage a stack of up to
four Cabletron Systems SEH100TX-22 non-intelligent hubs. The SEHI is
placed at the bottom of the stack. It manages all SEH hubs in the stack
and provides full packet and error statistics for the entire stack, individual
device, or individual port.
Stack up to four SEH non-intelligent hubs with one SEHI using the
Cabletron Systems external HubSTACK Interconnect cables provided
with each SEH. Stackable configurations make it possible to maintain
only one IEEE repeater hop while providing up to 120 ports. Hubs can be
added or removed from the stack without having to power down the entire
stack.
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Chapter 2: SEHI Features and Options
2.4
RACK MOUNTING CAPABILITIES
The SEHI can be installed in a 19-inch rack. Cabletron Systems provides
brackets and mounting screws with the SEHI. See Chapter 4,
Installation, for complete rack mounting instructions.
2.5
REMOTE NETWORK MANAGEMENT
Manage the SEHI remotely with any SNMP network management
system. Cabletron Systems offers the following remote management
packages:
•
•
•
Cabletron Systems SPECTRUM
Cabletron Systems SPECTRUM Element Manager/Windows
Cabletron Systems Remote SPECTRUM Portable Management
Applications
•
Third Party SNMP compliant Network Management Packages
2.6
OPTIONAL 100BASE-TX and 100BASE-FX EPIMs
100BASE-TX and 100BASE-FX EPIMs are not included with the SEHI
but can be purchased separately from Cabletron Systems.
EPIMs enable the expansion of a network through different types of
media. Cabletron Systems offers two optional EPIMs for the
SEHI100TX-22 and the SEH100TX-22 as shown in Table 2-1.
Table 2-1 100BASE-TX/FX EPIMs
EPIM
Media Type
Connector
EPIM-100TX
EPIM-100FX
Category 5 UTP Cable
RJ45
SC
Multimode Fiber Optic Cable
2-4
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CHAPTER 3
INSTALLATION REQUIREMENTS
AND SPECIFICATIONS
This Chapter describes cabling requirements, network guidelines, and
operating specifications for the SEHI100TX-22.
The network must meet the requirements and conditions
specified in this chapter to obtain satisfactory performance from
this equipment. Failure to follow these guidelines could result in
poor network performance.
!
CAUTION
3.1
CABLE SPECIFICATIONS
The front panel SEHI100TX-22 network ports support Category 5
Unshielded Twisted Pair (UTP) cabling. Ethernet Port Interface Modules
(EPIMs) expand the network using UTP (EPIM-100TX) or multimode
fiber optic (EPIM-100FX) cabling. For information concerning the two
EPIM types, refer to Appendix A. The rear panel Interconnect Bus ports
support Cabletron Systems Interconnect cables for stackable applications.
Take care in planning and preparing the network cabling and connections.
The quality of the connections and the length of cables are critical factors
in determining the reliability of the network. The following sections
describe specifications for each media type.
3.1.1
HubSTACK Interconnect Cable Requirements
Attach the SEHI to the stacked SEH modules with the HubSTACK
Interconnect cables provided with each SEH and available only from
Cabletron Systems (P/N 9380209). The cable attaches to the SEHI rear
panel bus “OUT” port. The SEHI must be placed at the bottom of the
stack. Stack up to four SEH hubs together with one SEHI.
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Chapter 3: Installation Requirements and Specifications
3.1.2
UTP Cable Specifications
The device at the other end of the twisted pair segment must meet IEEE
802.3u 100BASE-T specifications. When connecting a 100BASE-TX
Twisted Pair Segment to the SEHI twisted pair network ports and the
EPIM-100TX module, the network must meet the following
requirements:
Length
The IEEE 802.3u 100BASE-T standard requires that 100BASE-TX
devices be capable of transmitting over a 100 meter (328 foot) link using
Category 5 UTP wire.
Impedance
UTP cables typically have an impedance of between 85 to 110 ohms.
Jitter
Intersymbol interference and reflections cause jitter in the bit cell timing,
resulting in data errors. A 100BASE-TX link must not generate more than
1.4 ns of jitter. If the cable meets the impedance requirements for a
100BASE-TX link, jitter should not be a concern.
Crosstalk
Crosstalk is caused by signal coupling between the different cable pairs
contained within a multi-pair cable bundle. 100BASE-TX transceivers are
designed so that the user does not need to be concerned about cable
crosstalk, provided the cable meets all other requirements.
Noise
Noise is caused by either crosstalk or externally induced impulses.
Impulse noise may cause data errors if the impulses occur at very specific
times during data transmission. Generally, the user need not be concerned
about noise. If noise-related data errors are suspected, it may be necessary
to either reroute the cable or eliminate the source of the impulse noise.
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Cable Specifications
Propagation Delay
Propagation delay is the amount of time it takes data to travel from the
sending device to the receiving device. Total propagation delay allowed
for the network is 256 bit times (2.56 µs) in one direction (5.12 µs round
trip). If the total propagation delay between any two nodes on the network
exceeds 2.56 µs, then use bridges or other devices to further segment the
network.
Temperature
The attenuation of PVC insulated cable varies significantly with
temperature. At temperatures greater than 40°C (104°F), Cabletron
Systems recommends the use of plenum-rated cables to ensure that cable
attenuation remains within specification.
3.1.3
Multimode Specifications for the EPIM-100FX
The SEHI supports the Cabletron Systems EPIM-100FX. The
EPIM-100FX meets IEEE 802.3u standards. When connecting a fiber
optic segment to the SEHI EPIM-100FX module, the network must meet
the following requirements:
Cable Loss
Test the fiber optic cable with a fiber optic attenuation test set adjusted for
an 850 nm wavelength. This test verifies that the signal loss in a cable is
within an acceptable level. The maximum loss for a multimode fiber optic
cable is 11.0 dB.
Fiber Optic Budget and Propagation Delay
Determine the maximum fiber optic cable length by calculating the fiber
optic budget delay and total network propagation before fiber optic cable
runs are incorporated in any network design.
Fiber optic budget is the combination of the optical loss due to the fiber
optic cable, in-line splices, and fiber optic connectors.
Propagation delay (collision delay) is the amount of time it takes data to
travel from the sending device to the receiving device. Total propagation
delay allowed for the entire network is 256 bit times (2.56 µs) in one
direction (5.12 µs round trip). If the total propagation delay between any
two nodes on the network exceeds 2.56 µs, then use bridges or other
devices to further segment the network.
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Chapter 3: Installation Requirements and Specifications
3.2
NETWORK CABLE LENGTHS
This section details the maximum network cable lengths specified by the
IEEE 802.3u standard for a Class I repeater. As stated previously, the
physical size of the network is limited primarily by propagation delay.
The round trip delay cannot exceed 512 bit times or 5.12 µs.
A stack of five SEH hubs or four SEH hubs and one SEHI hub
NOTE
A 100BASE-T network might use all UTP links, all fiber links or a
combination of both. Table 3-1 details the maximum link lengths for each
type and combination of cable when used with a Class I repeater.
Figure 3-1 shows a simplified example of a network with one Class I
repeater. Link segments A and B represent the longest links in the
network. In this case, if both segment A and segment B are UTP, each
segment may be up to 100 meters long for a maximum network length of
200 meters. If segment A is UTP and segment B is fiber, the maximum
length of the network is 263 meters (with a maximum UTP segment
length of 100 meters). If both segments A and B are fiber, the maximum
length is 274 meters.
The maximum length of an individual UTP segment may be no
more than 100 meters.
!
CAUTION
Table 3-1 Maximum Class I Network Cable Length
Number of
UTP
UTP & Fiber
Fiber
Repeaters
1
200 m
263 m
274 m
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Network Port Specifications
SEHI100TX-22
Repeater
A
B
DTE
DTE
Figure 3-1 Class I Network
3.3
NETWORK PORT SPECIFICATIONS
The SEHI network ports use shielded RJ45 connectors that support UTP
cabling. Figure 3-2 shows the RJ45 pinouts.
1 2 3 4 5 6 7 8
9X
11X
10X
1. Receive +
2. Receive -
3. Transmit +
4. Not Used
5. Not Used
6. Transmit -
7. Not Used
8. Not Used
09162_02
Figure 3-2 RJ45 Network Ports
3.4
COM PORT REQUIREMENTS
The RJ45 COM port supports access to a Local Management Console.
The COM port supports a Digital Equipment Corporation VT320 terminal
or PC emulation of the VT320 terminal. Figure 3-3 shows the pinouts for
the RJ45 COM port.
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Chapter 3: Installation Requirements and Specifications
1 2 3 4 5 6 7 8
COM
5. Signal Ground
1. Transmit Data
6. Data Terminal Ready
7. Request To Send
8. Clear To Send
2. Data Carrier Detect
3. Data Set Ready
4. Receive Data
1511_15
Figure 3-3 COM Port Pinouts
3.5
OPERATING SPECIFICATIONS
section. Cabletron Systems reserves the right to change these
specifications at any time without notice.
3.5.1
Power Supply Requirements
The SEHI uses a universal power supply. The input requirements are
listed in Table 3-2.
Table 3-2 Power Supply Requirements
Line Input Range
Volts (V)
Current
Amperes (A)
Frequency
Hertz (Hz)
100–125 Vac
200–250 Vac
4.0 A
2.0 A
50/60 Hz
3.5.2
Environmental Requirements
This section details the environmental requirements of the SEHI.
Operating Temperature:
Storage Temperature:
Operating Humidity:
5°C to 40°C (41°F to104°F)
-30°C to 90°C (-22°F to194°F)
5% to 95% (non-condensing)
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Agency Approvals
3.6
AGENCY APPROVALS
The safety, emission, and immunity approvals for the SEHI are detailed in
this section.
Safety
This unit meets the safety requirements of UL 1950, CSA C22.2 No. 950,
IEC 950 and EN 60950.
Emissions
This unit meets the emission requirements of FCC Part 15 Class A,
EN 55022 Class A and VCCI Class I.
Immunity
This unit meets the immunity requirements of EN 50082-1 including
IEC 801-2 (ESD), IEC 801-3 (Radiated Susceptibility), and
IEC 801-4 (EFT/B).
3.7
PHYSICAL SPECIFICATIONS
This section details the physical specifications for the SEHI.
Dimensions (H x W x D):
Weight:
2.8 in x 17.0 in x 13.5 in
(7.2 cm x 43.6 cm x 34.6 cm)
7 lb (3.15 kg)
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CHAPTER 4
INSTALLATION
This chapter outlines the procedure for attaching the SEHI to the network
as a stackable or standalone device. Ensure that the network meets the
guidelines and requirements outlined in Chapter 3, Installation
Requirements and Specifications, before installing the SEHI.
A single phase grounded power receptacle that meets the
requirements listed in Chapter 3 must be located within seven
NOTE
feet of the installation.
Failure to follow installation instructions may result in an
electrical shock hazard.
4.1
UNPACKING THE SEHI
Unpack the SEHI as follows:
1. Remove the shipping material covering the SEHI in the shipping box.
2. Carefully remove the SEHI from the shipping box and set it aside to
prevent damage.
3. Visually inspect the SEHI. If there are any signs of damage, contact
Cabletron Systems Technical Support immediately.
4. Read the SEHI Release Notes included in the shipping box.
Cabletron Systems includes a 3-1/2" disk with the
SEHI100TX-22 that contains a backup copy of the FLASH
NOTE
Firmware Image File. Download the file to the SEHI100TX-22 if
the existing image becomes corrupted. See Appendix B for
detailed download instructions.
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Chapter 4: Installation
4.2
PRE-INSTALLATION CHECKOUT
The SEHI is equipped with an NVRAM reset switch (Figure 4-1) located
behind the grillwork on the side of the hub. Ensure that this switch is in
the DOWN position by looking in through the grillwork on the right side
of the hub. If the switch is UP, move it into the DOWN position with a
non-metallic tool. Do not remove the chassis cover to perform this
operation. Leaving the switch in the UP position results in user-installed
parameters such as IP address and Community Names being cleared from
NVRAM whenever the SEHI loses power and/or is reset. See Chapter 6,
Section 6.4 for detailed instructions on setting the NVRAM switch.
Rear of Chassis
NVRAM Switch located behind grating
1511_02
Figure 4-1 NVRAM Switch Location
The SEHI may be installed on a tabletop or shelf, or in a 19-inch rack, and
configured as a standalone or stacked hub.
Refer to Section 4.3 for information concerning a tabletop or shelf
installation. Section 4.4 describes the rackmount installation.
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Tabletop or Shelf Installation
4.3
TABLETOP OR SHELF INSTALLATION
This section provides guidelines for installation on a tabletop or shelf.
Tabletop and shelf installations must be within reach of the network
cabling and meet the requirements listed below:
•
In a shelf installation, the shelf must be able to support 30 pounds of
static weight for each device in the stack.
•
Maintain a temperature of between 5°C (41°F) and 40°C (104°F) at
the installation site with fluctuations of less than 10°C per hour.
The SEHI must be located within seven feet of its power source and with
an unrestricted free surface area as shown in Figure 4-2.
In order to allow for proper cooling, there must be a two-inch
clearance on either side and the back of the unit.
!
CAUTION
21 IN.
HubSTACK 100BASE-TX HUB WITH LANVIEW®
SEHI100TX-22
RCV
LNK
A
22 21 20 19 18 17 16 15 14 13 12
22X 21X 20X 19X 18X 17X
16X 15X 14X 13X 12X
PWR
CPU
CLN
RCV
LNK
E
1
6 IN.
11 10
9
8
7
6
5
4
3
2
1
11X 10X
9X
8X
7X
6X
5X
4X
3X
2X
1X
EPIM
1
7 FT.
1511_03
Figure 4-2 Tabletop or Shelf Installation
Proceed to Section 4.5, Powering Up and Stacking the SEHI.
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Chapter 4: Installation
4.4
RACKMOUNT INSTALLATION
To install the SEHI in a 19-inch rack, Cabletron Systems provides a kit
with the SEHI that includes rackmount brackets, mounting screws, and a
strain-relief bracket for cable management.
Rack mounting the SEHI involves the following:
•
•
•
Attaching the strain-relief bracket
Rack mounting the SEHI
Stacking the SEHI when applicable
Attaching the Strain-Relief Bracket
Attach the strain-relief bracket to the front of the SEHI as follows:
1. Locate the strain-relief bracket and four 8-32 x 3/8-inch pan-head
screws from the rackmount kit.
Do NOT attempt to attach the strain-relief bracket with screws
other than the 8-32 x 3/8-inch screws included with the SEHI.
Use of longer screws may damage the unit or cause
electrical shock.
2. Attach the strain-relief bracket to the bottom of the SEHI (Figure 4-3).
.
Screws (4)
Strain-Relief Bracket
1
E P I M
5 X
4 X
3 X
2 X
1 X
1 1 X 1 0 X
9 X
1
E
8 X
7 X
6 X
1 0
9
1 8
7
6
5
4
3
2
1
C L N
L N K
R C V
C P U
P W R
1 6 X 1 5 X 1 4 X 1 3 X 1 2 X
2 2 X 2 1 X 2 0 X 1 9 X 1 8 X 1 7 X
2
2 2 2 1 2 0 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2
L N K
R C V
E
2 2
1 0 0 T X S - E H I
L A N W V I T I E H W ®
1 0 0 B A A S E C - K T X H H U u B b S T
1511_19
Figure 4-3 Attaching the Strain Relief Bracket
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Rackmount Installation
Rack Mounting the SEHI
Refer to Figure 4-4 and proceed as follows to install the SEHI into a
19-inch rack.
1. Remove the four cover screws (two from each side) located along the
front edges of each side of the SEHI.
Do not remove the cover from the SEHI100TX-22. Do not
remove any other screws from the unit.
2. Using the four 6-32 x 3/8-inch replacement flathead cover screws
provided in the rack mounting kit, attach the rack mounting brackets
to each side of the SEHI.
Rack Mounting
Brackets (2)
HubSTACK 100BASE-TX HUB WITH LANVIEW®
SEHI100TX-22
RCV
LNK
A
22 21 20 19 18 17 16 15 14 13 12
22X 21X 20X 19X 18X 17X
16X 15X 14X 13X 12X
PWR
CPU
CLN
RCV
LNK
E
1
11 10
9
8
7
6
5
4
3
2
1
11X 10X
9X
8X
7X
6X
5X
4X
3X
2X
1X
EPIM
1
1511_05
Screws (4)
Figure 4-4 Installing the Rack Mounting Brackets
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3. Ensure that the rack used will support the unit, and that the rack will
remain stable with the unit installed in it. Support the SEHI securely
from underneath, and align the mounting brackets of the SEHI chassis
with the screw holes in the equipment rack as shown in Figure 4-5.
Fasten the SEHI to the equipment rack securely.
19-Inch Rack
HubSTACK 100BASE-TX HUB WITH LANVIEW®
SEHI100TX-22
RCV
LNK
A
22 21 20 19 18 17 16 15 14 13 12
22X 21X 20X 19X 18X 17X
16X 15X 14X 13X 12X
PWR
CPU
CLN
RCV
LNK
E
1
11 10
9
8
7
6
5
4
3
2
1
11X 10X
9X
8X
7X
6X
5X
4X
3X
2X
1X
EPIM
1
Screws (4)
1511_06
Figure 4-5 Installing the SEHI in the Rack
The cooling fans at the rear panel of the SEH must have
adequate clearance (two inches on either side and in the
rear) for unrestricted air flow. The temperature for the selected
location must be maintained between 5˚C and 40˚C, and
fluctuate less than 10˚C per hour.
!
CAUTION
Proceed to Section 4.5, Powering Up and Stacking the SEHI.
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Powering Up and Stacking the SEHI
4.5
POWERING UP AND STACKING THE SEHI
The following section details the procedures that must be followed to
power up and interconnect stacked hubs. Failure to follow this procedure
may result in damage to the equipment.
If you are using an intelligent hub (SEHI) to manage the stack,
you must locate the SEHI at the bottom of the stack.
!
CAUTION
The SEHI must be completely powered up and initialized
before powering up and interconnecting the rest of the stack.
The SEH and the SEHI have universal power supplies that
allow connection to power sources from 100 Vac to 125 Vac
NOTE
@ 4.0 A or 200 Vac to 250 Vac @ 2.0 A, 50/60 Hz.
1. Power up the SEHI by plugging the power cord into the back panel of
the SEHI and plugging the other end into a grounded receptacle.
Locate the SEHI at the bottom of the stack.
NOTE
For management purposes, stacked hubs are always
numbered from 1 to 5 starting at the bottom.
2. Verify that the PWR LED is on, indicating that the SEHI is receiving
power. After the SEHI runs a self test and completes the boot process
successfully, the CPU LED blinks green indicating normal operation.
If the LED remains red, the processor is faulty; contact Cabletron
Systems Technical Support. Do not proceed with the following steps
until the CPU LED is a steady blinking green.
Do NOT power up or interconnect any other hubs in the stack
until the SEHI has successfully completed the boot process.
!
CAUTION
3. Power up the SEH above the SEHI in the stack by plugging the power
cord into the back panel of the SEH and plugging the other end into a
grounded receptacle.
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Chapter 4: Installation
4. Verify that the PWR LED is on, indicating that the SEH is receiving
power.
Do NOT connect the interconnect cable between the SEH and
the SEHI before powering up the SEH. Otherwise damage to
the SEH may result.
!
CAUTION
5. Attach the HubSTACK Interconnect cable provided with the SEH to
the “IN” port on the rear panel of the SEH as shown in Figure 4-6.
6. Attach the other end of the interconnect cable to the “OUT” port on the
rear panel of the hub at the bottom of the stack.
Do not leave an interconnect cable connected at only one end
during network operation. Corrupted data may result.
!
CAUTION
7. Repeat steps 3 through 6 until all SEH hubs are connected.
REAR VIEW
SEHI Managing 4 SEH Non-Intelligent Hubs
SEH100TX-22 100BASE-TX HUB WITH LANVIEW®
OUT
SEH100TX INTERCONNECT
IN
SEH100TX-22 100BASE-TX HUB WITH LANVIEW®
OUT
SEH100TX INTERCONNECT
IN
SEH100TX-22 100BASE-TX HUB WITH LANVIEW®
100BASE-TX HubSTACK
Interconnect Cable
OUT
SEH100TX INTERCONNECT
IN
SEH100TX-22 100BASE-TX HUB WITH LANVIEW®
OUT
SEH100TX INTERCONNECT
IN
SEHI100TX-22 100BASE-TX HUB WITH LANVIEW®
OUT
SEHI100TX INTERCONNECT
IN
1511_07
Figure 4-6 Stacking the SEHI
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Installing the EPIM-100TX or the EPIM-100FX
4.6
INSTALLING THE EPIM-100TX OR THE EPIM-100FX
This section contains procedures on how to install the EPIM-100TX or
the EPIM-100FX to upgrade or change the capabilities of your SEHI.
After installing a new EPIM, refer to the appropriate EPIM section in
Appendix A to verify proper operation.
Observe all static precautions while handling an EPIM.
!
CAUTION
Install an EPIM-100TX or an EPIM-100FX as follows:
When removing an EPIM, pull the module straight out to
prevent damage to the connector.
!
CAUTION
1. Remove the coverplate or the existing EPIM (whichever applies).
2. Slide the new EPIM into place, making sure that the connectors on the
rear of the EPIM align correctly and firmly with the connector inside
the SEHI. Refer to Figure 4-7.
3. Install the mounting screw.
EPIM 1
LNK
EPIM-100TX
1511_09
Figure 4-7 Installing an EPIM-100TX/FX
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CHAPTER 5
CONNECTING TO THE NETWORK
This chapter outlines the procedure for connecting the SEHI to a network.
Ensure that the network meets the guidelines and requirements outlined in
Chapter 3, Installation Requirements and Specifications, before
installing the SEHI.
5.1
CONNECTING THE SEHI TO THE NETWORK
The procedure for connecting network segments to the SEHI varies
list and perform the procedure described in the subsections that apply to
connecting the SEHI to a network:
•
•
•
Network Ports
EPIM-100TX
EPIM-100FX
Section 5.1.1
Section 5.1.2
Section 5.1.3
Prior to connecting the network cabling, check the connectors for the
proper pinouts as shown in Chapter 3.
5.1.1
Connecting to Network Ports
Attach UTP segments to the RJ45 Network Ports on the front panel of the
SEHI. Each twisted pair port on the SEHI incorporates a polarity
detection and correction feature. The polarity detection and correction
feature allows the SEHI to pass data regardless of the polarity of the
twisted pair segment’s receive link. Operating in this condition is not
recommended; the segment should be removed from the network and
wired correctly by a technician.
Connect the twisted pair segments to the SEHI as follows:
1. Insert the RJ45 connector from each twisted pair segment into the
desired network port on the SEHI. See Figure 5-1.
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Chapter 5: Connecting to the Network
12X
13X
14X
15X
LNK
16X
EPIM-100TX
1X
2X
3X
4X
5X
EPIM 1
1511_10
Figure 5-1 SEHI Network Ports
2. Check that the applicable LNK LED for the port is on. If the LED is
off, perform each of the following steps until it is on:
a. Check that the 100BASE-TX device at the other end of the twisted
pair segment is powered up.
b. Verify that the RJ45 connector on the twisted pair segment has the
proper pinouts. Check the cable for continuity.
c. Check that the twisted pair connection meets dB loss and cable
specifications outlined Chapter 2.
If a link is not established, contact Cabletron Systems Technical Support.
5.1.2
Connecting a UTP Segment to an EPIM-100TX
The EPIM-100TX is often used to provide a connection between the
SEHI and a bridge, router, or switch. Normally, in this configuration, a
“straight-through” cable is used and the EPIM crossover switch shown in
The EPIM-100TX is also used to provide another RJ45 port to connect to
a UTP segment. Before connecting a segment to the EPIM-100TX, check
each end of the segment to determine if the wires have been crossed over
for the proper connection. If the wires do not cross over, use the switch on
the EPIM-100TX to internally cross over the RJ45 port. Refer to
Figure 5-2 to properly set the EPIM-100TX crossover switch.
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Connecting the SEHI to the Network
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
5. NC
6. TX-
7. NC
8. NC
Position =
(not crossed over)
1. TX+
2. TX-
3. RX+
4. NC
5. NC
6. RX-
7. NC
8. NC
1511_11
Figure 5-2 EPIM-100TX Crossover Switch
Connect an EPIM-100TX to a twisted pair segment as follows:
1. Connect the twisted pair segment to the module by inserting the RJ45
connector on the twisted pair segment into the RJ45 port on the
module. See Figure 5-2.
2. Check that the LNK LED on the EPIM-100TX is on. If the LED is off,
perform each of the following steps until it is on:
a. Check that the 100BASE-TX device at the other end of the twisted
pair segment is powered up.
b. Verify that the RJ45 connector on the twisted pair segment has the
proper pinouts.
c. Check the cable for continuity.
d. Check that the twisted pair connection meets dB loss and cable
specifications outlined in Chapter 3, Section 3.1.2.
e. Check that the crossover switch is in the correct position.
If a link is not established, contact Cabletron Systems Technical Support.
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Chapter 5: Connecting to the Network
5.1.3
Connecting a Fiber Segment to the EPIM-100FX
The EPIM-100FX has an SC style network port (see Figure 5-3).
Cabletron Systems supplies fiber optic cables using SC connectors that
are keyed to insure proper crossover of the transmit and receive fibers.
An odd number of crossovers (preferably one) must be
maintained between devices so that the transmit port of one
NOTE
device is connected to the receive port of the other device and
vice versa.
Use the following steps to connect a fiber segment to the SEHI:
1. Remove the protective plastic covers from the fiber optic ports on the
module port and from the ends of the connectors.
Do not touch the ends of the fiber optic strands, and do not let
the ends come in contact with dust, dirt, or other contaminants.
Contamination of the ends causes problems in data
!
CAUTION
transmissions. If the ends become contaminated, clean them
with alcohol using a soft, clean, lint free cloth.
2. Insert one end of the SC connector into the EPIM-100FX on the SEHI.
See Figure 5-3.
12X
13X
14X
15X
LNK
16X
100FX
EPIM-
1X
2X
3X
4X
EPIM 1
5X
1511_17
Figure 5-3 EPIM-100FX Port
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Testing the Installation
3. At the other end of the fiber optic cable, attach the SC connector to the
other device.
4. Check that the EPIM-100FX LNK LED is on. If the LED is off,
perform the following steps until it is on:
a. Check that the power is turned on for the device at the other end of
the link.
b. Verify proper “cross-over” of fiber strands between the applicable
port on the SEHI and the fiber optic device at the other end of the
fiber optic link segment.
c. Verify that the fiber connection meets the dB loss specifications
outlined in Chapter 3.
If a link is not established, contact Cabletron Systems Technical Support.
5.2
TESTING THE INSTALLATION
The SEHI00TX-22 is now ready for operation. Before placing the
network into service, test that all stations can be addressed and that the
SEHI and all stations are indicating normal operation. Ensure that the
networking software is configured properly to match the installed
network. If there are any errors or abnormal operation, proceed to
Chapter 6, Troubleshooting.
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CHAPTER 6
TROUBLESHOOTING
This chapter contains instructions for using LANVIEW LEDs to
troubleshoot physical layer network problems. It also describes how to
reset the SEHI and how to reset the NVRAM switch.
6.1
INSTALLATION TEST
After connecting the SEHI to the network, verify that packets pass
between all Ethernet devices connected to the SEHI and any other devices
connected to the network. If there is a problem with any of the attached
devices, check the link as follows:
1. Check that the LNK LED, if applicable, for the port is on. If the LED
is not on:
a. Check that the 100BASE-TX device at the other end of the twisted
pair segment is powered up.
b. Verify that the connector on the twisted pair segment has the
proper pinouts. Refer to Chapter 3 for the pin assignments for
twisted pair connectors.
c. For the EPIM-100FX check that the TX and RX fibers are
properly connected.
d. Check the cable for continuity. Several tools are available for this
test, depending on the media used.
e. Check that the twisted pair segments meet cable specifications for
dB loss as described in Chapter 3.
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Chapter 6: Troubleshooting
2. If the remote station is ready and the LNK LED is on, but no data
passes through the port, one of two conditions may exist:
•
Network management has disabled the port. Correct this condition
by enabling the port through network management.
•
The port is segmented either because the collision detector was on
for more than 110 µs or the SEHI detected more than 32
consecutive collisions on the attached segment. The affected port
remains segmented until a good packet is transmitted/received
without collisions.
If the LNK LED is still not on, contact Cabletron Systems Technical
Support.
6.2
USING LANVIEW
The SEHI incorporates the Cabletron Systems LANVIEW status
monitoring and diagnostics system. LANVIEW LEDs help diagnose
problems such as power failure or cable fault. The SEHI includes the
following LANVIEW LEDs:
•
•
•
PWR, for power status
CPU, for board status
RCV (Receive), LNK (Link), and CLN (Collision) for Ethernet
status.
Figure 6-1 provides a quick reference chart of LED locations and
definitions. This chapter also includes a detailed description of each LED.
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Using LANVIEW
HubSTACK 100BASE-TX HUB WITH LANVIEW®
SEHI100TX-22
RCV
LNK
A
22X
22 21 20 19 18 17 16 15 14 13 12
PWR
CPU
CLN
RCV
LNK
RESET
E
COM
11 10
9
8
7
6
5
4
3
2
1
11X
LED NAME
LED COLOR
DEFINITION
PWR
(Power)
Off
No power
Power
Green (Solid)
CPU
Off
CPU in BOOT process
CPU initializing
(Central Processing Unit)
Green (Flashing)
Green (Blinking)
Red (Solid)
CPU functioning
CPU not functioning
CLN
(Collision)
Red
Collision
RCV
(Receive)
Yellow (Flashing)
Off
SEHI is receiving data
No activity
LNK
(Link)
Green
Off
Link established
No link
1511_13
Figure 6-1 LANVIEW LEDs
Flashing indicates an irregular LED pulse.
Blinking indicates a steady LED pulse.
NOTE
PWR
When this green LED is on, it indicates that the SEHI is receiving power.
If this LED is off, it indicates a loss of input power. Check the input
power source (circuit breaker, fuse, etc.). If the proper source power is
present, the problem could be with the SEHI.
CPU
This LED alternates from red to green to during power up. After the boot
is complete, the LED blinks green. A blinking green LED indicates
normal operation. A red LED indicates a faulty processor.
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Chapter 6: Troubleshooting
CLN
This red LED indicates that a collision has occurred on one of the ports.
RCV
When a yellow RCV LED flashes, it indicates that the SEHI is receiving
data packets from the associated port segment. Each SEHI port has a
corresponding RCV LED:
•
•
•
Network Ports: RCV LEDs
EPIM 1: RCV LED
Management
1-22
E
A
LNK
When a green LNK LED is on, it indicates an established link between
the associated port and the device at the other end of the segment. The
LNK LED remains on as long as a link is maintained. Each SEHI
Network Port (ports 1-22) has a corresponding LNK LED.
6.3
USING THE RESET BUTTON
The SEHI incorporates a recessed RESET button. See Figure 6-1. The
RESET button initializes the SEHI processor. This button does NOT
initialize Non-Volatile Random Access Memory (NVRAM), the
nonvolatile random access memory where the SEHI stores network
management parameters.
To use the RESET button, use a pen or pencil to press the button. When
this is done, the SEHI initializes itself.
All modules in a stacked configuration reset when the SEHI is
reset.
NOTE
6-4
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Setting the NVRAM Switch
6.4
SETTING THE NVRAM SWITCH
To prevent the possibility of electrical shock, do not remove the
chassis cover to access the NVRAM switch, and use only a
non-metallic tool when moving the NVRAM switch.
The SEHI uses NVRAM (Non-Volatile Random Access Memory) to store
user-entered parameters such as IP address and Community Names. To
reset these parameters to the factory defaults, refer to Figure 6-2 and
perform the following steps:
1. With the power ON and using a non-metallic tool, move the NVRAM
switch to the UP position.
2. Press the RESET switch located on the front panel.
3. Wait until the unit boots (approximately 12 seconds).
4. Return the NVRAM switch to the DOWN position.
Failure to return the NVRAM switch to the DOWN position will
result in loss of user-entered parameters upon power shutdown
and restart. The SEHI will clear NVRAM if the unit is restarted
with the switch in the UP position.
!
CAUTION
Rear of Chassis
NVRAM Switch located behind grating
1511_02
Figure 6-2 NVRAM Switch Location
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CHAPTER 7
LOCAL MANAGEMENT
This chapter explains how to set up a management terminal to access the
SEHI Local Management. It also explains how to use the Local
Management screens and commands.
Local Management supplies the tools to manage the SEHI and all of its
attached segments. It allows the user to perform the following tasks:
•
•
•
Assign an IP address and subnet mask
Select a default gateway
Control access to the SEHI through the community names established
in the Community Name Table
•
•
Designate which Network Management Workstations receive trap
messages from the device
Navigate through the Management Information Base (MIB) and
manage the objects within it from a remote location. Given the
appropriate security level, the MIB is accessible from the SEHI
through SNMP Tools.
Local Management also allows the user to manage each non-intelligent
stackable hub attached to the SEHI, and provides a Statistics screen to
view error, collision, and traffic statistics for the entire stack, individual
module, or individual port.
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Chapter 7: Local Management
7.1
LOCAL MANAGEMENT KEYBOARD
CONVENTIONS
All key names appear in this manual as capital letters. For example, the
enter (return) key appears as ENTER and the space bar appears as SPACE
bar. Table 7-1 explains the keyboard conventions used in this manual as
well as the key functions.
Table 7-1 Keyboard Conventions
Key
Function
RETURN Key and ENTER Key
These are selection keys that perform
the same Local Management
function. For example, “Press
ENTER” means press either ENTER
or RETURN, unless this manual
specifically instructs you otherwise.
SPACE bar and BACKSPACE Key
These keys cycle through selections
in some Local Management fields.
Use the SPACE bar to cycle forward
through selections and use
BACKSPACE to cycle backward
through selections.
Arrow Keys
These are navigation keys. Use the
UP-ARROW, DOWN-ARROW,
LEFT-ARROW, and RIGHT-ARROW
keys to move the screen cursor. For
example, “Use the arrow keys”
means to press whichever arrow key
moves the cursor to the desired field
on the Local Management screen.
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Management Terminal Setup
7.2
MANAGEMENT TERMINAL SETUP
Use one of the following systems to access Local Management:
•
•
A Digital Equipment Corporation VT series terminal
A VT type terminal running emulation programs for the Digital
Equipment Corporation VT series
•
An IBM or compatible PC running a VT series emulation software
package
An RJ45 console cable is required to attach the management terminal to
the SEHI. The console cable is included with the SEHI in a package that
contains the following:
•
•
•
UTP console cable with RJ45 connectors on each end
Adaptors for DB9 or DB25 connections
Instruction sheet
The following sections explain how to attach the console cable and set up
the management terminal. Refer to the RJ45 Cable Kit Instruction Sheet
for adapter pinouts and additional information.
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Chapter 7: Local Management
Console Cable Configuration
Use the RJ45 Cable Kit provided with the SEHI to attach the management
terminal to the SEHI COM port as shown in Figure 7-1.
Connect the console cable to the SEHI as follows:
1. Attach the male RJ45 connector to the COM port of the SEHI.
2. Attach the female end (25-pin or 9-pin, as applicable) to the COM port
on the terminal.
HubSTACK 100BASE-TX HUB WITH LANVIEW®
SEHI100TX-22
COM
COM RJ45 Port
Management Terminal
Console Cable
COM Port
1511_14
Figure 7-1 Management Terminal Connection
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Management Terminal Setup
Management Terminal Setup Parameters
Table 7-2 lists the setup parameters for the local management terminal. If
the terminal is a Digital Equipment Corporation VT320 terminal, press F3
to access the Setup Directory. If the local management terminal uses
terminal emulation of the VT320, refer to the equipment user manual for
setup procedures.
Table 7-2 Terminal Setup Parameters
Menu
Function
Selection
Columns
Controls
Auto Wrap
Test Cursor
Mode
80 Columns
Interpret Controls
No Auto Wrap
Cursor
Display Setup:
7 Bit Control
General Setup:
Cursor Keys
Transmit
Receive
Normal Cursor Keys
Transmit = 9600
Receive = Transmit
any option
XOFF
Bits, Parity
Stop Bit
8 Bits, No Parity
1 Stop Bit
Communications
Setup:
Local Echo
No Local Echo
DEC-423,
Port
Data Leads Only
Transmit
any option
Auto Answerback
Auto Repeat
Keyclick
No Auto Answerback
any option
any option
Keyboard Setup:
Margin Bell
Margin Bell
Warning Bell
Auto Answerback
Warning Bell
No Auto Answerback
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Chapter 7: Local Management
7.3
ACCESSING LOCAL MANAGEMENT
After configuring the local management terminal and properly attaching
the cables to the SEHI, access the Local Management interface.
Use the following steps to access Local Management:
1. Power up the terminal. The Password screen (Figure 7-2) appears.
SEHI LOCAL MANAGEMENT
Cabletron SEHI Revision X.XX.XX
Cabletron Systems Incorporated
35 Industrial Way, P.O. Box 5005
Rochester, NH 03867-0505 U.S.A.
(603) 332-9400
(c) Copyright Cabletron Systems, Inc. 1993
SEHI F/W Version: X.XX.XX
Boot Prom Version: X.XX.XX
SEHI Board Version: X.X
EnterUser Password:
1490_21
Figure 7-2 Password Screen
2. Enter the Password. The factory default password for Super-User
access is “public” or press ENTER.
The password is one of the community names specified in the
Community Name Table. Access to certain Local Management
NOTE
capabilities depends on the degree of access accorded that
community name. See Section 7.5 for more details about
community names.
3. Press ENTER.
•
If the password entry is invalid, the cursor returns to the beginning of
the password entry field.
•
If the password is valid, the associated access privilege appears briefly,
then the Feature Selection screen (Figure 7-3) appears.
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The Feature Selection Screen
If the terminal keyboard is not used for 15 minutes, the Local
Management session ends and the screen defaults to the
Password screen.
NOTE
7.4
THE FEATURE SELECTION SCREEN
The Feature Selection screen is the main menu screen for SEHI Local
Management. There are five screen options in the Feature Selection
screen: Community Name Table, IP Address Assignment, Component
Trap Table, SNMP Tool Support, and Device Statistics. Use the arrow
keys to highlight an option, then press ENTER (or press the
corresponding Function Key). The selected screen appears.
To exit your Local Management session, use the arrow keys to highlight
the EXIT LIM SERVICE command, then press ENTER.
SEHI LOCAL MANAGEMENT
Cabletron Systems Incorporated
P.O. Box 5005 Rochester, NH 03867-0505 U.S.A.
(603) 332-9400
FEATURE SELECTION
F6 COMMUNITY NAME TABLE
F7 IPADDRESS ASSIGNMENT
F8 COMPONENT TRAP TABLE
F9 SNMP TOOL SUPPORT
DEVICE STATISTICS
EXIT LIM SERVICE
1490_22
Figure 7-3 Feature Selection Screen
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Chapter 7: Local Management
7.5
THE COMMUNITY NAME TABLE SCREEN
To access the Community Name Table screen from the Feature Selection
screen, use the arrow keys to highlight the Community Name Table
option, then press ENTER or F6. The Community Name Table screen
shown in Figure 7-4 appears.
SEHI LOCAL MANAGEMENT
Cabletron SEHI Revision X.XX.XX
COMMUNITY NAME TABLE
COMMUNITY NAME
ACCESS
PUBLIC
PUBLIC
PUBLIC
PUBLIC
BASIC-READ
READ-ONLY
READ-WRITE
SUPER-USER
SAVE
F6
IP TABLE
F7
TRAP TABLE
F8
SNMP TOOLS
F9
RETURN
1490_23
Figure 7-4 Community Name Table Screen
Community names are set through the Community Name Table option.
Community names are passwords to Local Management and are agents of
security control to the SEHI. SEHI access is controlled by establishing up
to four different levels of security authorization: Basic-Read, Read-Only,
Read-Write, and Super-User.
With Super-User access, the user changes the existing passwords by
changing the community names. Only the community name assigned
Super-User access has full management privileges.
The following sections explain each field on the Community Name Table
screen and provides instructions on how to change them.
COMMUNITY NAME
Displays the user-defined name through which a user can access Local
Management for the SEHI. Any community name assigned here acts as a
password to Local Management.
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The Community Name Table Screen
ACCESS
Indicates the access status accorded each community name. The
following conditions are possible:
Basic-Read
This allows Read-Only access to Local
Management, but excludes read privileges to
the Component Trap screen.
Read-Only
This allows Read-Only access to Local
Management, but excludes access to security
protected fields of the upper levels of
authorization (Read-Write or Super-User).
Read-Write
Super-User
This allows the user to read and write to Local
Management fields, excluding IP Address,
Subnet Mask, and Community Names.
This access privilege gives the user read and
write access to Local Management. Super-User
allows read and write access to all modifiable
parameters including: Community Names, IP
Addresses, Traps, and SNMP Objects.
7.5.1
Editing the Community Name Field
The password used to access Local Management at the Password screen
must have Super-User privileges for the edits to take effect. If a password
is entered with Basic-Read, Read-Only, or Read-Write privileges, Local
Management displays the message “AUTHORIZATION PROHIBITS
ACCESS”, and does not include editing capabilities.
Use the following steps to edit the Community Name field:
1. Use the arrow keys to highlight the Community Name field adjacent
to the desired access level.
2. Enter the community name (maximum of 32 characters) into the field.
3. Press ENTER.
4. Repeat steps 1-3 for editing any of the other community names.
5. Use the arrow keys to highlight the SAVE command at the bottom of
the screen, then press ENTER or F6. The “SAVED OK” message
appears indicating that the edits have been saved to memory.
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Chapter 7: Local Management
The first time a user attempts to exit the screen without saving
NOTE
the changes, a “NOT SAVED?” message is displayed. The
edits are lost if the user proceeds to exit without saving the
changes.
6. To exit the screen, press the appropriate Function key or use the arrow
keys to highlight the RETURN command.
7. Press ENTER. The Feature Selection screen appears.
7.6
THE CONFIGURATION SCREEN
To access the Configuration screen from the Feature Selection screen, use
the arrow keys to highlight the IP Address Assignment option, then
press ENTER or F7. The screen shown in Figure 7-5 appears.
SEHI LOCAL MANAGEMENT
Cabletron SEHI Revision X.XX.XX
CONFIGURATION
I/F
1
IPAddress
SubNET Mask
MAC Address
000.000.000.000 000.000.000.000
00-00-1d-05-dc-36
Default Gateway: 0.0.0.0
Serial Port 1 Application: CONSOLE Baud Rate: 9600 --ACTIVE-
-
Port Enable Override: OVERRIDE DISABLED
SAVE
F6
COMMUNITY NAMES TRAP TABLE
F7 F8
SNMP TOOLS
F9
RETURN
1490_24
Figure 7-5 Configuration Screen
Assign the IP Address, Subnet Mask, and Default Gateway through the
SEHI Configuration screen. Use the Port Enable Override option to
enable all device ports in the stack. This option overrides the Port Disable
setting in the Statistics screen.
The following sections explain each field on the Configuration screen and
instructions on how to change them.
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The Configuration Screen
I/F
The number of the interface corresponding to the channels over which
packets with that IP Address pass. On the SEHI, this value is always 1.
IP Address
Displays the IP address of the SEHI.
SubNET Mask
Displays the subnet mask for the SEHI. A subnet mask is a 32-bit quantity
which “masks out” the network bits of the IP address. This is done by
setting the bits in the mask to 1 when the network treats the corresponding
bits in the IP address as part of the network or subnetwork address, or to 0
if the corresponding bit identifies the host.
MAC Address
Displays the physical address associated with the interface.
Default Gateway
Displays the default gateway for the SEHI. This field is not defined until
an appropriate value is entered. The default gateway identifies the default
gateway device that will forward packets to other IP subnetworks.
Serial Port 1 Application
Displays the port’s application setting as CONSOLE.
Baud Rate
Displays the Baud Rate setting of the device attached to the SEHI through
the serial port. The setting for the serial port is 9600.
Port Enable Override
This command lets the user override the Disable Port settings in the
Device Statistics screen to enable all ports in the stack.
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Chapter 7: Local Management
7.6.1
Setting the IP Address
Use the following steps to set the IP address:
1. Use the arrow keys to highlight the IP Address field.
2. Enter the IP address into this field. The format for this entry is
XXX.XXX.XXX.XXX, with values for XXX being from 0 to 255.
The screen beeps if non-numerics or adjacent dots are entered. If the
entry does not have three dots it will be rejected.
3. Press ENTER. The IP address appears and the natural subnet mask for
the user is generated and also appears.
4. Use the arrow keys to highlight the SAVE option, then press ENTER
or F6. The “SAVED OK” message appears indicating that the changes
have been saved to memory.
The first time an attempt is made to exit the screen without
saving the changes, a “NOT SAVED?” message is displayed.
NOTE
The edits are lost if the user proceeds to exit without saving the
changes.
7.6.2
Setting the Subnet Mask
Consult the Network Administrator prior to setting the Subnet
Mask.
NOTE
The subnet mask defines how the SEHI treats SNMP Trap IP destination
addresses in its Trap Table.
•
Set the subnet mask when workstations in the Trap Table reside on a
different subnet (i.e., across a gateway or router), and these
workstations are to receive SNMP traps.
•
Use the subnet mask factory default setting of 0.0.0.0 when all trap
designated workstations are on the SEHI subnet.
Use the following steps to set the subnet mask:
1. Use the arrow keys to highlight the SubNET Mask field.
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The Configuration Screen
2. Enter the subnet mask into this field. The format for this entry is
XXX.XXX.XXX.XXX with values for XXX being from 0 to 255.
3. Press ENTER.
4. Use the arrow keys to highlight the SAVE option, then press ENTER
or F6. The “SAVED OK” message appears indicating that the changes
have been saved to memory.
The first time an attempt is made to exit the screen without
saving the changes, a “NOT SAVED?” message is displayed.
NOTE
The edits are lost if the user proceeds to exit without saving the
changes.
7.6.3
Setting the Default Gateway
The Default Gateway field allows the user to describe the router through
which the SEHI will be forwarding IP packets.
Use the following steps to set the Default Gateway:
1. Use the arrow keys to highlight the Default Gateway field.
2. Enter the gateway’s default mask in this field. The format for this entry
is XXX.XXX.XXX.XXX with values for XXX being from 0 to 255.
3. Press ENTER. If your entry is accepted as a valid default gateway,
“OK” appears to the right of the field.
4. Use the arrow keys to highlight the SAVE option, then press ENTER
or F6. The “SAVED OK” message appears indicating that the changes
have been saved to memory.
7.6.4
Using the Port Enable Override
Use the following steps to override the Disable Port settings:
1. Use the arrow keys to highlight the Port Enable Override field.
2. Press ENTER to toggle from the default setting of “OVERRIDE
DISABLED” to “OVERRIDE ENABLED”.
3. The adjacent field displays “Y/N”. Enter Y to continue enabling all of
the ports, or N to discontinue the port enable override. The message
“PORT ENABLED” appears after Y is entered.
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Chapter 7: Local Management
7.6.5
Exiting the Configuration Screen
Use the following steps to exit the Configuration screen and return to the
Feature Selection screen:
1. Press the appropriate Function key. To return to the Feature Selection
screen, use the arrow keys to highlight the RETURN command.
2. Press ENTER. The Feature Selection screen appears.
7.7
THE TRAP TABLE SCREEN
Access the Trap Table screen from the Features Selection screen using the
arrow keys to highlight the Component Trap Table option, then press
ENTER or F8. The screen shown in Figure 7-6 appears.
SEHI LOCAL MANAGEMENT
Cabletron SEHI Revision X.XX.XX
TRAP TABLE
IPAddress
SNMP Community Name
Traps
<CR>
<CR>
<CR>
<CR>
<CR>
<CR>
<CR>
<CR>
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
0.0.0.0
N
N
N
N
N
N
N
N
SAVE
F6
COMMUNITY NAMES
F7
IP TABLE
F8
SNMP TOOLS
F9
RETURN
1490_25
Figure 7-6 Trap Table Screen
The Trap Table defines the management stations that receive SNMP Traps
for alarm/event notification. The following sections explain each field on
the Trap Table screen and provide instructions on how to change them.
SNMP Community Name
Displays the community name included in the trap message sent to the
Network Management Station with the associated IP address.
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The Trap Table Screen
Traps
Enables transmission of the traps to the network management station with
the associated IP address.
Trap IP Address
Indicates the IP address of the workstation to receive trap alarms from the
SEHI.
7.7.1
Configuring the Trap Table
Use the following steps to configure the Trap Table:
1. Use the arrow keys to highlight the SNMP Community Name field,
then enter the community name.
2. Press ENTER.
3. Use the arrow keys to highlight the Traps field and enter Y to send
alarms from the SEHI to the workstation, or N to prevent alarms from
being sent.
4. Press ENTER.
5. Use the arrow keys to highlight the appropriate Trap IP Address
field.
6. Enter the IP address of the workstation that you want to send traps to
in this field. The format for this entry is XXX.XXX.XXX.XXX, with
the value of XXX ranging from 0 to 255, and three dots, or else it
returns to the beginning of the field.
7. Use the arrow keys to highlight the SAVE option, then press ENTER
or F6. The “SAVED OK” message appears indicating that the changes
have been saved to memory.
7.7.2
Exiting the Trap Table Screen
Use the following steps to exit the Trap Table screen and return to the
Feature Selection screen:
1. Press the appropriate Function key. To exit to the Feature Selection
screen, use the arrow keys to highlight the RETURN command.
2. Press ENTER. The Feature Selection screen appears.
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Chapter 7: Local Management
7.8
THE SNMP TOOLS SCREEN
This section describes how to use the SNMP Tools screen to access
Management Information Bases (MIBs). Access to screen options
depends on the access status accorded to the user’s community name.
This section describes Super-User management capabilities.
SNMP Tools allows access to valuable MIB information. The user gets
information about specific object identifiers (OIDs), edit the values of
configurable OIDs, and request the OID numerically sequential to the
originally requested OID.
Other ways to view OIDs from the SNMP Tools screen include Walking,
Stepping, and Cycling. Walk and Cycle let the user review several OIDs at
a time.
To access the SNMP Tools screen from the Features Selection screen, use
the arrow keys to highlight the SNMP Tools Support option, then press
ENTER or F9. The SNMP Tools screen shown in Figure 7-7 appears.
SEHI LOCAL MANAGEMENT
Cabletron SEHI Revision X.XX.XX
SNMP TOOLS
SNMP COMMUNITY NAME: public
OID PREPEND: 1.3.6.1
GET SET GETNEXT WALK RECALL-OID STEP CYCLES REPEAT
F6
F7
F8
F9
RETURN
F10
1490_26
Figure 7-7 SNMP Tools Screen
The following sections describe SNMP Tools screen fields.
SNMP COMMUNITY NAME
Identifies the community name used as a password to determine access
level to the MIB component.
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The SNMP Tools Screen
OID PREPEND
Specifies the number prefix common to all Object Identifiers (OIDs)
found in the MIBs – 1.3.6.1 is the default prefix OID. This is a modifiable
field.
GET
Lets you retrieve MIB objects using SNMP protocol.
SET
Allows users with Read-Write and Super-User access to change
modifiable MIB objects, using SNMP protocol.
GETNEXT
Displays the OID following the current OID.
WALK
Allows the user to scroll through a section of the MIB leaf by leaf, from a
user-specified object identifier. Leaves are the sections of the OID
separated by periods. When a walk is initialized, the following categories
for each walk entry, or step are displayed.
•
•
•
•
Specified OID – gives the number tag for that OID.
Size – identifies the number of bytes it takes to store that object.
Type – specifies the variable type of the object (e.g., int = integer).
Data – displays what the object identifier represents.
Recall-OID
Recalls, from memory, the last OID used.
STEP
Displays the MIB walk, step by step, giving the user time to view specific
leaves in detail.
CYCLES
Allows the user to specify the number of GETNEXT requests to cycle
through and how much time will elapse between each request.
REPEAT
Repeats the last GET command, allowing the user to monitor changes to a
specific OID.
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Chapter 7: Local Management
7.8.1
Getting Individual OIDs
Use the following steps to GET an OID:
1. Highlight GET, using the arrow keys, then press ENTER or F6.
“<GET> OID (=|F9)” appears.
2. Use one of the following options to enter the OID:
•
•
•
Enter the OID minus the prepend (e.g., if the prepend is 1.3.6.1,
and 4.1.3 is entered, then the OID=1.3.6.1.4.1.3).
Enter an “=” and the OID suffix (e.g., if =4.1.3 is entered, then the
OID=4.1.3). This allows the user to not use the prepend.
Press F9 to recall an OID already entered. The user can then use
the keyboard to modify the recalled OID as necessary.
3. Press ENTER. If there is no instance of that OID, the return code will
specify “MIB_NO_INSTANCE”, otherwise, information about that
OID data type, length, and value appear.
7.8.2
Getting the Next OID
Use the following steps to GET the next OID:
1. Highlight GETNEXT with the arrow keys, then press ENTER or F8.
“<GETNEXT> OID (=|F9)” appears.
2. Enter the desired OID, or OID extension. (Press F9 to recall the last
OID request. The recalled OID may then be modified as necessary.)
3. Press ENTER. If there is no instance of that OID, the return code
specifies “MIB_NO_INSTANCE”, otherwise, information about the
data type, length, and value of that OID appear.
7.8.3
Setting an OID
Use the following steps to SET an OID:
1. Highlight SET by using the arrow keys, then press ENTER or F7.
“<SET> OID (=|F9)” appears.
2. Enter the OID, minus the OID prepend. If the OID was previously
entered, pressing F9 recalls that entry. The arrow keys may be used to
modify the recalled OID if necessary.
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The SNMP Tools Screen
3. Press ENTER. If there is no instance of that OID, the return code will
specify “MIB_NO_INSTANCE”, otherwise “DATA TYPE:”
appears.
4. Enter the data type for that OID. The following are possible choices:
integer, string, null, OID, IP address, counter, gauge, timeticks, and
opaque.
5. Press ENTER. “DATA” appears.
6. Enter the value to correspond to the OID. If accepted, “<SET>
OPERATION CODE: XXXX <OK>” appears, otherwise an error
message appears.
7.8.4
Viewing Multiple OIDs
Viewing several object identifiers at one time allows the user to quickly
scan a MIB for the specific information that is needed. The WALK
command scrolls through OIDs numerically sequential to the initial OID
request. The STEP command scrolls the MIB Walk, one OID at a time.
Cycling allows you to specify how many GETNEXT commands to cycle
through for one OID.
7.8.5
Walking Through OIDs
Use the following steps to WALK through an OID:
1. Highlight WALK, using the arrow keys, then press ENTER.
“<INITIAL> OID (=|F9)” appears.
2. Enter the OID (minus the prepend) and press ENTER. The screen will
begin walking through the sublayers of the MIB available from the
specified OID. Each OID listed displays the specified OID, its size, its
type, and the data it contains.
3. Press the SPACE bar to stop the walk, or wait for “***MIB WALK
COMPLETED***” to appear on the screen.
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Chapter 7: Local Management
7.8.6
Stepping Through OIDs
Use the following steps to STEP through OIDs (the user can step through
only after a GETNEXT):
1. Highlight STEP, using the arrow keys, then press ENTER. “Specify
OID” appears.
2. Enter the OID (only the suffix is necessary) and press ENTER. The
Tools screen will begin to scroll one OID at a time, through all of the
sublayers of the MIB available for that OID.
7.8.7
Cycling Through OIDs
Use the following steps to CYCLE through an OID:
1. Use the arrow keys to Highlight CYCLES, then press ENTER.
2. Enter the number of cycles desired to occur after “ENTER CYCLE
COUNT:”, then press ENTER.
3. Enter how many seconds delay desired between get next requests after
“ENTER CYCLE DELAY (secs):”, then press ENTER.
7.8.8
Exiting the SNMP Tools Screen
To exit the SNMP Tools Screen:
1. Use the arrow keys to highlight the RETURN command.
2. Press ENTER. The Feature Selection screen appears.
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The Device Statistics Screen
7.9
THE DEVICE STATISTICS SCREEN
This section describes the features of the Device Statistics screen. The
user can view error, collision, and traffic statistics for the stack, a selected
module, or a selected port. The user can also enable and disable ports.
To access the Statistics screen from the Features Selection screen, use the
arrow keys to highlight the Device Statistics option, then press ENTER.
The Device Statistics screen shown in Figure 7-8 appears.
SEHI LOCAL MANAGEMENT
Cabletron SEHI Revision X.XX.XX
DEVICE STATISTICS
MODULE: 1
PORT: 1
STACK TOTAL
67960
255
67960
255
BYTES RECEIVED:
FRAMES RECEIVED:
3792125
16547
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
ERRORS RECEIVED:
COLLISIONS:
OOW COLLISIONS:
CRC ERRORS:
ALIGNMENT ERRORS:
RUNT PACKETS:
GIANT PACKETS:
PORTADMIN. STATUS:
PORT SEG. STATUS:
0
0
0
0
0
0
0
0
ENABLE
UNSEGMENTED
ENABLE PORT
UPDATE -FREQ 3 Sec
DISABLE PORT
MODULE
1
PORT
1
RETURN
1490_27
Figure 7-8 Device Statistics Screen
The following sections describe Device Statistics screen fields and
provide instructions on how to change them.
BYTES RECEIVED
Displays the number of bytes received.
FRAMES RECEIVED
Displays the number of frames received.
ERRORS RECEIVED
Displays the number of errors received.
COLLISIONS
Displays the number of collisions received.
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Chapter 7: Local Management
OOW COLLISIONS
Displays the number of Out Of Window collisions. OOW collisions are
usually caused by the network being too long where the round trip
propagation delay is greater than 51.2 µs (the collision domain is too
large), a station somewhere on the network is violating Carrier Sense and
transmitting at will, or a cable somewhere on the network failed during
the transmission of the packet.
CRC ERRORS
Displays the number of packets with bad Cyclic Redundancy Checks
(CRC) that have been received from the network. The CRC is a 4-byte
field in the data packet that ensures that the transmitted data that is
received is the same as the data that was originally sent.
ALIGNMENT ERRORS
Displays the number of errors due to misaligned packets.
RUNT PACKETS
Displays the number of runt packets received from the network. A runt
packet is less than the minimum Ethernet frame size of 64 bytes, not
including preamble.
GIANT PACKETS
Displays the number of packets received that exceed 1518 data bytes, not
including preamble.
PORT ADMIN. STATUS
Displays the administrative status of the port selected. The two possible
status messages are Enable or Disable.
PORT SEG. STATUS
Displays the segmentation status of the port selected. The two possible
status messages are Segmented or Unsegmented. The SEHI and SEH
automatically partition problem segments, and reconnect non-problem
segments to the network.
ENABLE PORT
This command lets the user enable the selected port.
DISABLE PORT
This command lets the user Disable the selected port.
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The Device Statistics Screen
UPDATE-FREQ
Stack/Module/Port counter updates. Choose update intervals in
increments of 3 seconds, with the maximum interval being 99 seconds.
MODULE
This command lets the user view statistics for a selected module in the
stack. The SEHI is Module 1 and each SEH in the stack follows in
sequential order. Figure 7-9 shows each module number in the stack.
SEH - MODULE 5
SEH - MODULE 4
SEH - MODULE 3
SEH - MODULE 2
SEHI - MODULE 1
Figure 7-9 Module Number Sequence
PORT
Allows the user to view statistics for ports 1–24 of the selected module.
7.9.1
Selecting the Appropriate Module/Port
When the Device Statistics screen first appears, statistics are displayed for
Module 1 and Port 1. View statistics for another module and port by using
the Module x or Port x commands at the bottom of the screen.
Use the following steps to select a module or port:
1. Use the arrow keys to highlight the Module or Port command.
2. Press the SHIFT and + or - keys until the desired module or port
number appears.
3. Press ENTER. The selected Module and Port statistics appear.
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Chapter 7: Local Management
7.9.2
Using the ENABLE PORT Command
The ENABLE PORT command lets the user enable the selected port. The
user must first use the PORT command to select the desired port.
Use the following steps to set the PORT ENABLE command:
1. Use the arrow keys to highlight the ENABLE PORT command at the
bottom of the screen.
2. Press ENTER. The corresponding port is enabled and the Port Admin
Status field is updated.
7.9.3
Using the DISABLE PORT Command
The DISABLE PORT command lets the user disable the port selected in
the PORT command. The user must first use the PORT command to select
the desired port.
Use the following steps to set the DISABLE PORT command:
1. Use the arrow keys to highlight the DISABLE PORT command at the
bottom of the screen.
2. Press ENTER. The corresponding port is enabled and the Port Admin
Status field is updated.
7.9.4
Exiting the Device Statistics Screen
Use the following steps to exit the Device Statistics screen and return to
the Feature Selection screen:
1. Use the arrow keys to highlight the RETURN command at the bottom
of the screen.
2. Press ENTER. The Feature Selection screen appears.
7-24
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APPENDIX A
EPIM SPECIFICATIONS
A.1 EPIM SPECIFICATIONS
EPIMs enable the connection of the SEHI to the network using different
media types.The SEHI100TX-22 supports the EPIM-100TX and the
EPIM-100FX. This appendix provides specifications for each EPIM.
A.1.1 EPIM-100TX
The EPIM-100TX is an RJ45 connector supporting Unshielded Twisted
Pair (UTP) cabling.
The slide switch on the EPIM-100TX determines the cross-over status of
the cable pairs. If the switch is on the X side, the pairs are internally
crossed over. If the switch is on the = side, the pairs are not internally
crossed over. Figure A-1 shows the pinouts for the EPIM-100TX in both
positions.
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC
5. NC
6. TX-
7. NC
8. NC
Position =
(not crossed over)
1. TX+
2. TX-
3. RX+
4. NC
5. NC
6. RX-
7. NC
8. NC
1511_11
Figure A-1 EPIM-100TX Pinouts
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Appendix A: EPIM Specifications
A.1.2 EPIM-100FX
The EPIM-100FX shown in Figure A-2 supports Multimode Fiber Optic
cabling. The EPIM-100FX is equipped with an SC style connector.
Specifications for the EPIM-100FX are listed below.
12X
13X
14X
15X
LNK
16X
100FX
EPIM-
1X
2X
3X
4X
EPIM 1
5X
1511_17
Figure A-2 EPIM-100FX
Table A-1 Transmitter Power
Cable Type
Worst Case Budget
6.0 dB
Typical Budget
50/125 µm fiber
9.0 dB
62.5/125 µm fiber
100/140 µm fiber
9.0 dB
12.0 dB
18.0 dB
15.0 dB
The transmitter power levels and receive sensitivity levels listed are peak
power levels after optical overshoot. A peak power meter must be used to
correctly compare the values given above to those measured on any
particular port. If power levels are being measured with an average power
meter, add 3 dBm to the measurement to compare the measured values to
the values listed above.
A-2
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APPENDIX B
IMAGE FILE DOWNLOAD USING OIDS
This appendix provides instructions for setting up a TFTP server and to
download an image file to the SEHI by setting specific MIB OID strings.
Set the OID strings with the SNMP Tools screen described in Chapter 7.
Download an image file to the SEHI with a remote
management package such as SPECTRUM, SPECTRUM
NOTE
Element Manager, or the appropriate SPECTRUM Portable
Management Application. Refer to the specific package
documentation for image file download procedures.
The SEHI supports the Standard Local Download application. In this
application the SEHI automatically disables management while download
of the new firmware image is in progress.
Before downloading the image to a device, you must do the following:
•
Load the image file onto your network TFTP server.
For information on how to setup a workstation as a TFTP
server, refer to your specific workstation documentation and
the guidelines outlined in this instruction guide.
NOTE
•
Decompress the image file.
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Appendix B: Image File Download Using OIDs
B.1 SETTING UP A UNIX WORKSTATION AS A TFTP
SERVER
Due to variations between UNIX systems and individual configurations,
this section provides only GUIDELINES for configuring a UNIX
workstation to perform an image file download. The instructions include
command examples, where appropriate. Bold lettering in examples
indicates operator entry.
If unsure about how to properly configure your UNIX
workstation using these guidelines, contact your Systems
Administrator.
!
CAUTION
Due to variations between UNIX systems, and individual
configurations, this section provides only GUIDELINES for
NOTE
configuring a UNIX workstation to perform an image file
download.The instructions include command examples, where
appropriate. Bold lettering in examples indicates operator entry.
Downloading an image file requires setting up your UNIX workstation as
a TFTP server.
Use the following steps to set up a UNIX workstation:
1. If you already have a /tftpboot directory, confirm the TFTP setup of
your workstation as follows:
Request a process status and grep for TFTP
(e.g., unix% netstat -a | grep tftp).
The following information represents a typical output:
user
root
161 7.7 1.2 32 184 p3
87 0.0 0.9 48 136
S
S
12:00 grep tftp
11:05 tftp -s
?
The term tftp -s, located at the end of the root string, indicates TFTP is
active. If TFTP is NOT running, only the grep process appears.
2. If you do NOT have a /tftpboot directory, then create one
(e.g., unix% mkdir tftpboot).
B-2
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Standard Local Download
3. Ensure that the /tftpboot directory is not owned
(e.g., unix% chown nobody tftpboot).
4. Store the hex image file in the /tftpboot directory as sehi.hex.
This step requires decompression of the zipped image file. If
you do not have a UNIX unzip utility, access to a PC with
NOTE
pkunzip, or a way to FTP the decompressed image to a UNIX
workstation, contact Cabletron Systems Technical Support.
5. Edit the /etc/inetd.conf file by removing anything prior to the tftpboot
daemon (e.g., the # sign) that comments-out the line.
6. Kill the inetd process (e.g., unix% kill -HUP ‘process ID number’),
and then restart the process (e.g., unix% inetd), to enable the revised
inetd.conf file.
You must request a process status and grep for inetd to obtain
the process ID number (see step 3 above).
NOTE
B.2 STANDARD LOCAL DOWNLOAD
Table B-1 provides a step-by-step procedure for downloading the
firmware image file. This section provides specific MIB OIDs, their
names, and the required setting for proper image file download. Refer to
your specific MIB walking tool documentation for instructions on how to
set MIB OID strings.
Cabletron Systems enterprise MIBs (group 52). The specific OIDs
necessary to perform an image file download reside in the common
download group under
ctDL (Cabletron Download). The full OID string to reach this group is:
1.3.6.1.4.1.52.4.1.5.8.1
When performing the steps in Table B-1, keep the following in mind:
•
You must follow the steps in order.
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Appendix B: Image File Download Using OIDs
•
•
Enter the IP address of the TFTP server in standard dotted decimal
notation (e.g., 132.177.118.24).
Enter the FULL path to the image file in the ctDLTFTPRequest OID,
including the name of the image file (e.g., c:\tftpboot\sehi.hex).
Table B-1 OIDs and Settings
Data
Type
SNMP OID
Data
Step OID Name
OID Number
1.
2.
3.
ctDLForceOnBoot
1.3.6.1.4.1.52.4.1.5.8.1.1.0
integer
integer
IP
1
ctDLCommitRAMToFlash 1.3.6.1.4.1.52.4.1.5.8.1.2.0
1
ctDLTFTPRequestHost
1.3.6.1.4.1.52.4.1.5.8.1.4.0
Enter the IP
address address of
the TFTP
server.
4.
5.
ctDLTFTPRequest
1.3.6.1.4.1.52.4.1.5.8.1.5.0
1.3.6.1.4.1.52.4.1.5.8.1.3.0
string
(ASCII) path to the
image file.
Enter the
ctDLInitiateColdBoot
integer
1
B-4
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INDEX
D
Numerics
100BASE-TX
Default gateway 7-13
Device statistics
alignment errors 7-22
cable length 3-2
crosstalk 3-2
impedance 3-2
jitter 3-2
noise 3-2
propagation delay 3-3
temperature 3-3
bytes received 7-21
collisions 7-21
CRC errors 7-22
disable port 7-22
enable port 7-22
errors recieved 7-21
frames received 7-21
giant packets 7-22
module 7-23
oow collisions 7-22
port 7-23
port admin. status 7-22
port seg. status 7-22
runt packets 7-22
update freq 7-23
C
Cable Specifications 3-1
UTP and STP 3-2
Cable specifications
multimode fiber optic 3-3
Com port 3-5
Community name table
access 7-9
community name 7-8
Configuration
Device statistics screen 7-21
Dimensions 3-7
baud rate 7-11
default gateway 7-11
I/F 7-11
E
IP address 7-11
Environmental requirements 3-6
EPIM installation 4-9
EPIM specifications 2-4
EPIM-100FX A-2
EPIM-100TX A-1
MAC address 7-11
port ENABLE override 7-11
serial port application 7-11
subnet mask 7-11
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Index
F
O
FLASH EEPROMs 2-2
OIDs 7-16
FLASH firmware image 4-1
Operating specifications 3-6
H
P
Help 1-3
Port ENABLE override 7-13
HubSTACK
Power supply requirements 3-6
cable requirements 3-1
R
I
Remote network management 2-4
IP address 7-12
Reset 6-4
L
S
LANVIEW 6-2
Safety requirements 3-7
SEHI features 2-2
Size
dimensions 3-7
SNMP tools
LEDs 6-3
Local Management 7-1
accessing 7-6
community name table 7-8
configuration screen 7-10
console cable 7-4
cycles 7-17
get 7-17
device statistics 7-21
DISABLE port 7-24
ENABLE port 7-24
port enable override 7-13
setting default gateway 7-13
setting IP address 7-12
setting subnet mask 7-12
SNMP tools 7-16
getnext 7-17
OID prepend 7-17
recall OID 7-17
repeat 7-17
set 7-17
SNMP community name 7-16
step 7-17
walk 7-17
terminal requirements 7-3
terminal setup 7-5
trap table 7-14
SNMP tools screen 7-16
Subnet mask 7-12
T
N
Trap table
Network connection 5-1
EPIM-100FX 5-4
EPIM-100TX 5-2
unshielded twisted pair 5-2
Network port specifications
SEHI100TX-22 3-5
NVRAM
SNMP community name 7-14
trap IP address 7-15
traps 7-15
Trap table screen 7-14
Troubleshooting 6-1
setting 6-5
Index-2
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POWER SUPPLY CORD
The mains cord used with this equipment must be a 2 conductor plus ground type
with minimum 0.75 mm square conductors and must incorporate a standard IEC
appliance coupler on one end and a mains plug on the other end which is suitable
for the use and application of the product and that is approved for use in the
country of application.
GERMAN:
Die Netzleitung, die mit diesem Geraet benuetzt wird, soll einen zwei Leiter mit
Erdleiter haben, wobei die Leiter mindestens 0.75 mm sind, mit einer normalen
IEC Geraetesteckdose an einem Ende und einem Geraetestecker am anderen Ende
versehen sind, der fuer den Gebrauch und die Anwendung des Geraetes geeignet
und der zum Benuetzen im Lande der Anwendung anerkannt ist.
SPANISH:
El cable principal de la red eléctrica utilizado con este equipo debe tener 2
conductores y 1 toma de tierra con un mínimo de 0.75 mm2 cada uno y necesita
tener un aparato de acoplamiento standard IEC en un extremo y un enchufe para
el cable principal de la red eléctrica en el otro extremo, lo cual sea adecuado para
el uso y applicación del producto y lo cual sea aprobado para uso en el pais de
applicación.
FRENCH:
Le cordon d' alimentation reliant cet appareil au secteur doit obligatoirement avoir
deux fils conducteurs de 0.75 mm2 minimum et un fil de terre. It doit également
être équipé du côté appareil d'une fiche agrée IEC et du côte secteur, d'une prise
adaptée à l'usage du produit et aux normes du pays où l'appareil est utilisé.
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