Moxa Technologies Switch EDS 726 User Manual

MOXA EtherDevice™ Switch  
EDS-726 Series User’s Manual  
First Edition, July 2005  
Moxa Networking Co., Ltd.  
Tel:  
+886-2-2910-1230  
Fax: +886-2-2910-1231  
MOXA Technical Support  
Worldwide:  
The Americas  
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Table of Contents  
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1
Chapter  
1
Introduction  
Welcome to MOXA EtherDevice Switch EDS-726 Series, the modular managed Gigabit Ethernet  
Switch designed especially for connecting Ethernet-enabled devices in industrial field  
applications.  
The following topics are covered in this chapter:  
Overview  
Package Checklist  
Features  
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EDS-726 Series User’s Manual  
Introduction  
Overview  
Network planning is easy and flexible with EDS-726, which has a modular design that lets you  
install up to 2 Gigabit ports and 24 fast Ethernet ports in one switch. Choose from three 1-port  
Gigabit modules with copper or fiber optic connectors, and eight 4-port Fast Ethernet modules  
with copper or fiber optic (SC/ST) connectors. EDS-726 is suitable for any industrial application,  
and leaves room for future expansion. Features include an angled LED display for convenient  
viewing from any vertical angle, pluggable CompactFlash for configuration back-up, network  
redundancy, and intelligent network management. EDS-726 provides more flexibility, reliability,  
and application-oriented functions to meet the demands of any harsh industrial application.  
Package Checklist  
MOXA EDS-726 is shipped with the following items. If any of these items is missing or damaged,  
please contact your customer service representative for assistance.  
y
y
y
1 MOXA EDS-726 modular switch system or Interface Module  
Hardware Installation Guide  
CD-ROM with User’s Manual and Windows Utility (for EDS-726 modular switch system  
only)  
y
y
Moxa Product Warranty booklet  
RJ45 to DB9 Console port cable (for EDS-726 modular switch system only)  
NOTE: Please notify your Moxa sales representative if any of the above items is missing or  
damaged.  
Features  
Industrial Networking Capability  
y
y
y
y
y
y
y
Redundant Gigabit Ethernet Ring Capability (recovery time < 300 ms at full load)  
IGMP Snooping and GMRP for filtering multicast traffic from industrial Ethernet Protocols  
Supports IEEE 802.1Q VLAN and GVRP protocol to ease network planning  
Supports QoSIEEE 802.1p/1Q and TOS/DiffServ to increase determinism  
Supports 802.3ad, LACP for optimum bandwidth utilization  
Supports IEEE 802.1X and SSL to enhance network security  
SNMP V1/V2C/V3 for different levels of network management security  
Designed for Industrial Applications  
y
Modular Managed Switch with up to 26 ports. Choose from the following modules:  
¾ Three 1-port Gigabit modules, with 10/100/1000BaseT(X) (RJ45 connector), or  
1000BaseSX/LX (SC connector)  
¾ Eight 4-port fast Ethernet Modules with a combination of 10/100BaseT(X) (RJ45  
connectors) and 100BaseFX (Single/Multimode, SC/ST connectors)  
y
y
y
y
y
y
CompactFlash card for upgrading firmware and loading or saving configurations  
Long-haul transmission distance of 40 km or 80 km  
Redundant, dual DC power inputs  
IP 30, rugged high-strength metal case  
DIN-Rail or panel mounting ability  
Bandwidth management to prevent unpredictable network status  
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EDS-726 Series User’s Manual  
Introduction  
y
y
y
y
y
y
Lock port for authorized MAC address access only  
Port mirroring for online debugging  
Automatic warning by exception through email, relay output  
Digital inputs to integrate a sensor and alarm with an IP network  
Automatic recovery of connected device IP addresses  
Line-swap fast recovery  
Useful Utility and Remote Configuration  
y
y
Configurable by Web browser, Telnet/Serial console, Windows utility  
Send ping commands to identify network segment integrity  
Recommended Software and Accessories  
y
y
y
EDS-SNMP OPC Server Pro  
DR-4524, DR-75-24, DR-120-24 DIN-Rail 24 VDC Power Supply Series  
WK-32: Wall Mounting Kit  
1-3  
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2
Chapter  
2
Getting Started  
This chapter explains how to access EDS-726 for the first time. There are three ways to access the  
switch: serial console, Telnet console, and web browser. The serial console connection method,  
which requires using a short serial cable to connect EDS-726 to a PC’s COM port, can be used if  
you do not know EDS-726’s IP address. The Telnet console and web browser connection methods  
can be used to access EDS-726 over an Ethernet LAN, or over the Internet.  
The following topics are covered:  
RS-232 Console Configuration (115200, None, 8, 1, VT100)  
Configuration by Telnet Console  
Configuration by Web Browser  
Disabling Telnet and Browser Access  
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EDS-726 Series User’s Manual  
Getting Started  
RS-232 Console Configuration (115200, None, 8, 1, VT100)  
Connection Caution!  
NOTE  
1. You cannot connect to EDS-726 simultaneously by serial console and Telnet.  
2. You can connect to EDS-726 simultaneously by web browser and serial console, or by web  
browser and Telnet.  
However, we strongly suggest that you do NOT use more than one connection method at the  
same time. Following this advice will allow you to maintain better control over the  
configuration of your EDS-726.  
We recommend using MOXA PComm Terminal Emulator, which can be downloaded free of  
charge from Moxa’s website.  
NOTE  
Before running PComm Terminal Emulator, use an RJ45 to DB9-F (or RJ45 to DB25-F) cable to  
connect EDS-726’s RS-232 Console port to your PC’s COM port (generally COM1 or COM2,  
depending on how your system is set up).  
After installing PComm Terminal Emulator, take the following steps to access the RS-232 Console  
utility.  
1. From the Windows desktop, click on Start Æ Programs Æ PCommLite2.5 Æ Terminal  
Emulator.  
2. Select Open under Port Manager to open a new connection.  
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3. The Communication Parameter page of the Property window opens. Select the appropriate  
COM port for Console Connection, 115200 for Baud Rate, 8 for Data Bits, None for Parity,  
and 1 for Stop Bits.  
4. Click on the Terminal tab, and select VT100 for Terminal Type. Click on OK to continue.  
5. Type 1 to select ansi/VT100 terminal type, and then press Enter.  
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Getting Started  
6. The Console login screen will appear. Press Enter to open the Account pop-up selector and  
then select either admin or user. Use the keyboard’s down arrow to move the cursor to the  
Password field, enter the Console Password (this is the same as the Web Browser password;  
leave the Password field blank if a console password has not been set), and then press Enter.  
7. EDS-726’s Main Menu will be displayed. (NOTE: To modify the appearance of the PComm  
Terminal Emulator window, select Font… under the Edit menu, and then choose the desired  
formatting options.)  
8. After entering the Main Menu, use the following keys to move the cursor, and to select  
options.  
Key  
Function  
Move the onscreen cursor  
Display & select options  
Toggle options  
Up/Down/Left/Right arrows, or Tab  
Enter  
Space  
Esc  
Previous Menu  
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Getting Started  
Configuration by Telnet Console  
You may use Telnet to access EDS-726’s console utility over a network. To be able to access  
EDS’s functions over the network (by Telnet or Web Browser) from a PC host that is connected to  
the same LAN as EDS-726, you need to make sure that the PC host and EDS-726 are on the same  
logical subnetwork. To do this, check your PC host’s IP address and subnet mask. By default,  
EDS-726’s IP address is 192.168.127.253 and EDS-726’s subnet mask is 255.255.0.0 (for a Class  
B network). If you do not change these values, and your PC host’s subnet mask is 255.255.0.0,  
then its IP address must have the form 192.168.xxx.xxx. On the other hand, if your PC host’s  
subnet mask is 255.255.255.0, then its IP address must have the form 192.168.127.xxx.  
To use EDS-726’s management and monitoring functions from a PC host connected to the same  
LAN as EDS-726, you must make sure that the PC host and EDS-726 are on the same logical  
subnetwork.  
NOTE  
NOTE  
NOTE  
Before accessing the console utility via Telnet, first connect one of EDS-726’s RJ45 Ethernet  
ports to your Ethernet LAN, or directly to your PC’s Ethernet NIC. You can establish a  
connection with either a straight-through or cross-over Ethernet cable.  
EDS-726’s default IP is 192.168.127.253.  
Follow the steps below to access the console utility via Telnet.  
1. Click on Start Æ Run, and then telnet to EDS-726’s IP address from the Windows Run  
window. (You may also issue the telnet command from the MS-DOS prompt.)  
2. Type 1 to choose ansi/vt100, and then press Enter.  
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Getting Started  
3. The Console login screen will appear. Press Enter to open the Account pop-up selector and  
then select either admin or user. Use the keyboard’s down arrow to move the cursor to the  
Password field, enter the Console Password (this is the same as the Web Browser password;  
leave the Password field blank if a console password has not been set), and then press Enter.  
4. When the Main Menu of EDS-726’s console utility opens, click on Terminal Æ  
references… from the menu at the top of the window.  
5. When the Terminal Preferences window opens, make sure that the VT100 Arrows box is  
checked.  
The Telnet Console looks and operates in precisely the same manner as the RS-232 Console.  
NOTE  
Configuration by Web Browser  
MOXA EDS-726’s web browser interface provides a convenient way to modify the switch’s  
configuration and access the built-in monitoring and network administration functions. You may  
use either Internet Explorer or Netscape to access EDS-726.  
To use EDS-726’s management and monitoring functions from a PC host connected to the same  
LAN as EDS-726, you must make sure that the PC host and EDS-726 are on the same logical  
subnetwork.  
NOTE  
If EDS-726 is configured for other VLAN settings, you must make sure your PC host is on the  
management VLAN. Refer to the “Configuring 802.1Q VLAN” in Chapter 3 for the VLAN  
settings.  
NOTE  
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Getting Started  
Before accessing EDS-726’s web browser interface, first connect one of its RJ45 Ethernet ports  
to your Ethernet LAN, or directly to your PC’s Ethernet NIC. You can establish a connection  
with either a straight-through or cross-over Ethernet cable.  
NOTE  
MOXA EDS-726’s default IP is 192.168.127.253.  
NOTE  
Follow the steps below to access EDS-726’s web browser interface.  
1. Open Internet Explorer and type EDS-726’s IP address in the Address field. Press Enter to  
establish the connection.  
2. The web login page will open. Select the login account (Admin or User) and enter the  
Password (this is the same as the Console password), and then click Login to continue. Leave  
the Password field blank if a password has not been set.  
By default, EDS-726’s password is not set (i.e., is blank).  
NOTE  
You may need to wait a few moments for the web page to be downloaded to your computer. Use  
the menu tree on the left side of the window to open the function pages to access each of MOXA  
EtheDevice Switch’s functions.  
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Getting Started  
Disabling Telnet and Browser Access  
If you are connecting EDS-726 to a public network, but do not intend to use its management  
functions over the network, then we suggest disabling both Telnet Console and Web  
Configuration from the RS-232 Console’s Basic Settings Æ System Identification page, as  
shown in the following figure.  
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3
Chapter  
3
Featured Functions  
This chapter explains how to access EDS-726’s various configuration, monitoring, and  
administration functions. There are three ways to access these functions: RS-232 console, Telnet  
console, and web browser. The serial console connection method, which requires using a short  
serial cable to connect EDS-726 to a PC’s COM port, can be used if you do not know EDS-726’s  
IP address. The Telnet console and web browser connection methods can be used to access  
EDS-726 over an Ethernet LAN, or over the Internet.  
The Web Console is the most user-friendly way to configure EDS-726. In this chapter, we use the  
Web Console interface to introduce the functions. There are only a few differences between the  
Web Console, Serial Console, and Telnet Console.  
The following topics are covered in this chapter:  
Overview  
Configuring Basic Settings  
Using Port Trunking  
Configuring SNMP  
Using Communication Redundancy  
Using Traffic Prioritization  
Using Virtual LAN  
Using Multicast Filtering  
Using Bandwidth Management  
Using Port Access Control  
Using Auto Warning  
Using Line-Swap-Fast-Recovery  
Using Set Device IP  
Using Diagnosis  
Using Monitor  
Using the MAC Address Table  
Using Event Log  
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Overview  
A real-time simulation of the front-view of your EDS-726 is shown on the Overview web page.  
You should see the same view that you would see if you were standing right in front of the  
EDS-726. Position the cursor over the toggle switch and then click the left mouse button to see the  
different mode statuses of the interface module LED. You can use this figure to view and update  
status of each EDS-726 on the network.  
Active ports will be shown as green in the figure. Inactive ports are shown  
as black.  
P3  
P1  
P4  
P2  
PWR  
Note that the module name shown in the figure should match the module  
used with the switch.  
3
1
4
2
IM-4TX  
Configuring Basic Settings  
The Basic Settings group includes the most commonly used settings required by administrators to  
maintain and control EDS-726.  
System Identification  
The system identification items are displayed at the top of the web page, and will be included in  
alarm emails. Setting system identification items makes it easier to identify the different switches  
connected to your network.  
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Switch Name  
Setting  
Description  
Factory Default  
Max. 30  
This option is useful for specifying the role or Industrial Redundant Switch  
Characters  
application of different EDS-726 units.  
E.g., Factory Switch 1.  
[Serial No. of this switch]  
Switch Location  
Setting  
Description  
Factory Default  
Max. 80  
Characters  
To specify the location of different EDS-726  
units. E.g., production line 1.  
Switch Location  
Switch Description  
Setting  
Description  
Factory Default  
Max. 30  
Characters  
Use this space to record a more a detailed  
description of the EDS-726 unit.  
None  
Maintainer Contact Info  
Setting  
Description  
Factory Default  
Max. 30  
Characters  
To provide information about whom to contact None  
in order to resolve problems. Use this space to  
record contact information of the person  
responsible for maintaining this EDS-726.  
Password  
EDS-726 provides two levels of access privilege: admin privilege gives read/write access of all  
EDS-726 configuration parameters, and user privilege provides read access only. You will be able  
to view the configuration, but will not be able to make modifications.  
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ATTENTION  
EDS-726’s default Password is not set (i.e., is blank). If a Password is already set, then you will  
be required to type the Password when logging into either the RS-232 Console, Telnet Console,  
or Web Browser interface.  
Account  
Setting  
Description  
Factory Default  
admin  
user  
“admin” privilege allows the user to modify all  
EDS-726 configurations.  
admin  
“user” privilege only allows viewing EDS-726  
configurations.  
Password  
Setting  
Old Password  
Description  
Factory Default  
None  
Type current password when changing the  
(Max. 16 Characters) password  
New Password  
Type new password when changing the password None  
(Max. 16 Characters)  
Retype Password  
If you type a new password in the Password field, None  
(Max. 16 Characters) you will be required to retype the password in the  
Retype new password field before updating the  
new password.  
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Accessible IP  
Moxa EDS-726 uses an IP address-based filtering method to control access to EDS-726 units.  
Accessible IP Settings allows you to add or remove “Legal” remote host IP addresses to prevent  
unauthorized access. Access to EDS-726 is controlled by IP address. That is, if a host’s IP address  
is in the accessible IP table, then the host will be allowed access to the EDS-726. You can allow  
one of the following cases by setting this parameter:  
y
Only one host with the specified IP address can access the EDS-726  
E.g., enter “192.168.1.1/255.255.255.255” to allow access to just the IP address 192.168.1.1.  
y
Any host on a specific subnetwork can access the EDS-726  
E.g., enter “192.168.1.0/255.255.255.0” to allow access to all IPs on the subnetwork defined  
by this IP address/subnet mask combination.  
y
Any host can access the EDS-726  
Disable this function by not checkmarking the “Enable the accessible IP list” checkbox.  
The following table shows additional configuration examples:  
Allowable Hosts  
Input format  
Any host  
Disable  
192.168.1.120  
192.168.1.120 / 255.255.255.255  
192.168.1.0 / 255.255.255.0  
192.168.0.0 / 255.255.0.0  
192.168.1.0 / 255.255.255.128  
192.168.1.128 / 255.255.255.128  
192.168.1.1 to 192.168.1.254  
192.168.0.1 to 192.168.255.254  
192.168.1.1 to 192.168.1.126  
192.168.1.129 to 192.168.1.254  
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Port  
Port settings are included to give the user control over Port Access, Port Transmission Speed,  
Flow Control, and Port Type (MDI or MDIX). An explanation of each configuration item is given  
below.  
Enable  
Setting  
checked  
Description  
Factory Default  
enabled  
Allows data transmission through the port.  
Immediately shuts off port access.  
unchecked  
ATTENTION  
If a connected device or sub-network is wreaking havoc on the rest of the network, the Disable  
option under Advanced Settings/Port gives the administrator a quick way to shut off access  
through this port immediately.  
Description  
Setting  
Description  
Factory Default  
Media type  
Displays the media type for each module’s port N/A  
Name  
Setting  
Description  
Factory Default  
Max. 63 Characters Specify an alias for each port, and assist the  
administrator in remembering important  
information about the port.  
None  
E.g., PLC 1  
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Port Transmission Speed  
Setting  
Description  
Factory Default  
Auto  
Allows the port to use the IEEE 802.3u protocol  
to negotiate with connected devices. The port and  
connected devices will determine the best speed  
for that connection.  
Auto-nego  
100M-Full  
100M-Half  
10M-Full  
10M-Half  
Choose one of these fixed speed options if the  
opposing Ethernet device has trouble  
auto-negotiating for line speed.  
FDX Flow Control  
This setting enables or disables the flow control capability of this port when the “port transmission  
speed” setting is in “auto” mode. The final result will be determined by the “auto” process  
between EDS-726 and connected devices.  
Setting  
Enable  
Description  
Factory Default  
Enables flow control for this port when in  
auto-nego mode.  
Enable  
Disable  
Disables flow control for this port when in  
auto-nego mode.  
Port Type  
Setting  
Description  
Factory Default  
Auto  
Allows the port to auto detect the port type of the  
opposing Ethernet device and change the port  
type accordingly.  
Auto  
MDI  
Choose the MDI or MDIX option if the opposing  
Ethernet device has trouble auto-negotiating for  
port type.  
MDIX  
Network  
The Network configuration allows users to modify the usual TCP/IP network parameters. An  
explanation of each configuration item is given below.  
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Auto IP Configuration  
Setting  
Description  
Factory Default  
Disable  
Set up EDS-726’s IP address manually.  
By DHCP  
EDS-726’s IP address will be assigned  
automatically by the network’s DHCP server.  
Disable  
By BootP  
EDS-726’s IP address will be assigned  
automatically by the network’s BootP server.  
Switch IP Address  
Setting  
Description  
Factory Default  
IP Address of the EDS-726 Identifies the EDS-726 on a TCP/IP network.  
192.168.127.253  
Switch Subnet Mask  
Setting  
Description  
Factory Default  
Subnet mask of the  
EDS-726  
Identifies the type of network to which the  
EDS-726 is connected (e.g., 255.255.0.0 for a  
Class B network, or 255.255.255.0 for a Class  
C network).  
255.255.255.0  
Default Gateway  
Setting  
Description  
Factory Default  
Default Gateway of the  
EDS-726  
The IP address of the router that connects the  
LAN to an outside network.  
None  
DNS IP Address  
Setting  
Description  
Factory Default  
1st DNS Server’s  
IP Address  
The IP address of the DNS Server used by your None  
network. After entering the DNS Server’s IP  
address, you can input EDS-726’s url (e.g.,  
www.eds.company.com) in your browser’s  
address field, instead of entering the IP address.  
2nd DNS Server’s  
IP Address  
The IP address of the DNS Server used by your None  
network. EDS-726 will try to locate the 2nd  
DNS Server if the 1st DNS Server fails to  
connect.  
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Time  
EDS-726 has a time calibration function based on information from an NTP server or user  
specified Time and Date information. Functions such as Auto warning “Email” can add real-time  
information to the message.  
EDS-726 does not have a real time clock. The user must update the Current Time and Current  
Date to set the initial time for EDS-726 after each reboot, especially when the network doesn’t  
have an Internet connection for NTP server or there is no NTP server on the LAN.  
NOTE  
Current Time  
Setting  
Description  
Factory Default  
User adjustable time.  
The time parameter allows configuration of the 00h:00m:00s  
local time in local 24-hour format.  
Current Date  
Setting  
Description  
Factory Default  
User adjustable date.  
The date parameter allows configuration of the 1970/01/01  
local date in yyyy-mm-dd format.  
System Up Time  
Indicates EDS-726’s up time from the last cold start. The unit is seconds.  
Time Zone  
Setting  
User selectable time zone The time zone setting allows conversion from GMT (Greenwich  
GMT (Greenwich Mean Time) to local time. Mean Time)  
Description  
Factory Default  
Changing the time zone will automatically correct the current time. You should configure the  
time zone before setting the time.  
NOTE  
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Time Server IP/Name  
Setting  
Description  
Factory Default  
1st Time Server IP/Name  
IP or Domain address (e.g., 192.168.1.1 or  
time.stdtime.gov.tw or time.nist.gov).  
None  
EDS-726 will try to locate the 2nd NTP Server  
if the 1st NTP Server fails to connect.  
2nd Time Server IP/Name  
Time Server Query Period  
Setting  
Description  
Factory Default  
Query Period  
This parameter determines how frequently the 600 seconds  
time is updated from the NTP server.  
System File Update—By Remote TFTP  
MOXA EDS-726 supports saving your configuration file to a remote TFTP server or local host to  
allow other EDS-726 switches to use the same configuration at a later time, or saving the Log file  
for future reference. Loading pre-saved firmware or a configuration file from the TFTP server or  
local host is also supported for easy upgrading or configuration of EDS-726.  
TFTP Server IP/Name  
Setting  
Description  
Factory Default  
IP Address of TFTP  
Server  
The IP or name of the remote TFTP server. Must be None  
set up before downloading or uploading files.  
Configuration file path and name  
Setting  
Description  
Factory Default  
Max. 40 Characters  
The path and file name of EDS-726’s configuration None  
file in the TFTP server.  
Firmware file path and name  
Setting  
Description  
Factory Default  
Max. 40 Characters  
The path and file name of EDS-726’s firmware file. None  
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Log file path and name  
Setting  
Description  
Factory Default  
Max. 40 Characters  
The path and file name of EDS-726’s log file  
None  
After setting up the desired path and file name, click on Activate to save the setting, and then click  
on Download to download the prepared file from the remote TFTP server, or click on Upload to  
upload the desired file to the remote TFTP server.  
System File Update—By Local Import/Export  
Configuration File  
To export the configuration file of this EDS-726, click on Export to save it to the local host.  
Log File  
To export the Log file of this EDS-726, click on Export and save it to the local host.  
Some operating systems will open the configuration file and log file directly in the web page. In  
such cases, right click on the “Export” button to save a file.  
NOTE  
Upgrade Firmware  
To import the firmware file of this EDS-726, click on Browse to select the firmware file already  
saved on your computer. The upgrade procedure will proceed automatically after clicking on  
Import.  
Upload Configure Data  
To import the configuration file of this EDS-726, click on Browse to select the configuration file  
already saved on your computer. The upgrade procedure will proceed automatically after clicking  
on Import.  
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System File Update—By CF Card  
Setting  
Description  
Factory Default  
Enable CF Save/Load Enable saving and loading configuration and/or  
firmware from the CF card.  
Unchecked  
Configuration  
Check to enable saving and loading the  
configuration from the CF card (this option is  
selected by default if Enable CF Save/Load is  
checked).  
N/A  
N/A  
Firmware  
Check to enable saving and loading the firmware  
from the CF card.  
Factory Default  
The Factory Default function is included to give users a quick way of restoring EDS-726’s  
configuration settings to their factory default values. This function is available in the Console  
utility (serial or Telnet) and Web Browser interface.  
After activating the Factory Default function, you will need to use the default network settings to  
re-establish a web-browser or Telnet connection with your EDS-726.  
NOTE  
Using Port Trunking  
Link Aggregation allows one or more links to be aggregated together to form a Link Aggregation  
Group. A MAC client can treat Link Aggregation Groups as if they were a single link.  
EDS-726’s Port Trunking feature allows devices to communicate by aggregating up to four links  
in parallel, with a maximum of eight ports for each link. If one of the eight ports fails, the other  
seven ports will provide back up and share the traffic automatically.  
Port trunking can be used to combine up to eight ports between two EDS-726 switches. If all ports  
on both switch units are configured as 100BASE-TX and they are operating in full duplex, the  
potential bandwidth of the connection will be 1600 Mbps.  
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The Port Trunking Concept  
EDS-726 allows a maximum of 4 trunk groups, with a maximum of 8 trunk ports for each trunk  
group. You can configure the trunk group to be “Static” or “LACP.” Once the trunk group is set to  
“LACP,” all of the ports making up that group will be set to LACP enabled. The ports in the  
“Static” trunk groups, and all the non-trunk ports that do not belong to any trunk group, will be set  
to LACP disabled. When the port is set to LACP enabled, it will exchange LACPDU with its link  
partner, and will result in “Forwarding.” If all of the ports in the same group are “Blocked” or  
“Disabled” or “Down” (link-down), the trunk group will not work, and the user will see “LACP  
Failed” for that trunk group in the user interface.  
EDS-726 allows you to set more than 8 ports in one trunk group. Those ports that exceed the port  
limit (i.e., 8) will be set as “Standby” ports, as defined by the IEEE 802.3ad protocol. A “Standby”  
port is an LACP enabled port that is attached to a trunk group, but is not functioning yet. The port  
state of such ports will be listed as “Blocking.” A trunk group on “Standby” cannot be used by  
another trunk group, or be activated as an individual link. The standby port will start working as a  
normal trunk port whenever any other trunk port in the same group stops functioning, such as  
when a port fails to transmit or receive packets due to a physical fault. EDS-726 allows a  
maximum of 4 “Standby” ports for each LACP trunk group, so that a maximum of 12 ports can be  
assigned to each LACP trunk group. A Static trunk group cannot have “Standby” ports. This  
means that a Static trunk group can only have a maximum of 8 ports in the group.  
Port Trunking applies to connections between backbone devices as well as to connections in other  
network areas where traffic bottlenecks exist. Port Trunking provides the following benefits:  
y
Gives you more flexibility in setting up your network connections, since the bandwidth of a  
link can be expanded to 8 times the original bandwidth.  
y
Provides redundancyif one link is broken, the remaining trunked ports share the traffic  
within this link. EDS-726 allows a maximum of 4 “Standby” ports for each LACP trunk group.  
In another words, a maximum of 12 ports can belong to each LACP trunk group. These four  
standby ports provide redundancy to a normal 8-port trunk whenever any other trunk port in  
the same group does not function properly, such as when the port fails to transmit or receive  
packets due to a physical fault  
y
Load sharingMAC Client traffic may be distributed across multiple links.  
Keep the following points in mind when configuring port trunking:  
y
y
To avoid broadcast storms or loops in your network while configuring a trunk, first disable  
or disconnect all ports that you want to add to the trunk or remove from the trunk. After you  
finish configuring the trunk, enable or re-connect the ports.  
Up to 4 port trunking groups (designated Trk1, Trk2, Trk3, Trk4) can be used for each  
EDS-726.  
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y
y
Up to 8 ports can be inserted into each port trunk group. EDS-726 allows a maximum of 4  
“Standby” ports for each LACP trunk group. In another words, a maximum of 12 ports can  
belong to each LACP trunk group.  
The same transmission speed must be assigned to all ports belonging to one port trunking  
group. E.g., 100M Full, 100M Half, 10M Full, or 10M Half. The auto-negotiation function  
should be disabled for these ports.  
y
y
Full duplex operation onlyLink Aggregation is supported only on point-to-point links with  
MACs operating in full duplex mode.  
Multipoint AggregationsThe mechanisms specified in this clause do not support  
aggregations among more than two systems.  
When you activate port trunking settings, some advanced functions will either be set to factory  
default values, or disabled:  
y
Port stat, such as transmitting speed, duplex, and flow control will be set to the factory  
defaults.  
y
y
y
y
y
y
Communication Redundancy will be set to the factory default.  
802.1Q VLAN will be set to the factory default and will be disabled.  
Multicast Filtering will be set to the factory default.  
Port Lock will be set to the factory default and will be disabled.  
Set Device IP will be set to the factory default  
Mirror Port will be set to the factory default and will be disabled.  
Configuring Port Trunking  
The Port Trunking Settings page is used to assign ports to a Trunk Group.  
Step 1: Select Trk1, Trk2, Trk3, or Trk 4 from the Trunk Group drop-down box.  
Step 2: Select Static or LACP from the Trunk Type drop-down box.  
Step 3: Under Member Ports and Available Ports, checkmark to select specific ports.  
Step 4: Use the Up / Down buttons to add/remove designated ports to/from a trunk group.  
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Trunk Group (Maximum of 4 trunk groups)  
Setting Description  
Factory Default  
Trk1, Trk2, Trk3, Trk4 Display or designate the Trunk Type and Member  
Ports for Trunk Group 1, 2, 3, or 4.  
Trk1  
Trunk Type  
Setting  
Description  
Factory Default  
Static  
Static  
Designated Moxa proprietary trunking protocol  
Designated LACP (IEEE 802.3ad, Link  
Aggregation Control Protocol)  
Static  
LACP  
Member Ports/Available Ports  
Setting  
Description  
Factory Default  
Member/Available  
Ports  
Use Up/Down buttons to add/remove specific ports N/A  
from available ports to/from trunk group.  
Check box  
Port  
Check to designate which ports to add or remove.  
Port number  
Unchecked  
N/A  
N/A  
N/A  
N/A  
Port description  
Name  
Displays the media type for each module’s port  
Max. 63 Characters  
Indicates the transmission speed (100M-Full,  
100M-Half, 10M-Full, or 10M-Half)  
Speed  
Indicates if the FDX flow control of this port is  
“Enabled” or “Disabled.”  
N/A  
N/A  
N/A  
FDX Flow Control  
Add designated ports into trunk group from  
available ports.  
Up  
Remove designated ports from trunk group to  
available port.  
Down  
Trunk Table  
Setting  
Description  
Trunk Group  
Member Port  
Status  
Displays the Trunk Type and Trunk Group.  
Display which member ports belong to the trunk group.  
Success means port trunking is working properly.  
Fail means port trunking is not working properly.  
Standby means port trunking is working as a standby port. When there  
are more than eight ports trunked as a trunking group, the 9th port will  
be the standby port.  
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EDS-726 Series User’s Manual  
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Configuring SNMP  
EDS-726 supports SNMP V1/V2c/V3. SNMP V1 and SNMP V2c use a community string match  
for authentication, which means that SNMP servers access all objects with read-only or read/write  
permissions using the community string public/private (default value). SNMP V3, which requires  
you to select an authentication level of MD5 or SHA, is the most secure protocol. You can also  
enable data encryption to enhance data security.  
SNMP security modes and security levels supported by EDS-726 are shown in the following table.  
Select the security mode and level that will be used to communicate between the SNMP agent and  
manager.  
Protocol  
Version  
Authentication  
Type  
Data  
Encryption  
UI Setting  
Method  
V1, V2c  
Read  
Community  
Community  
string  
Use a community string match  
for authentication  
No  
SNMP V1,  
V2c  
V1, V2c  
Write/Read  
Community  
Community  
string  
Use a community string match  
for authentication  
No  
No  
Use account with admin or user  
to access objects  
No-Auth  
No  
Provides authentication based on  
HMAC-MD5, or HMAC-SHA  
algorithms. 8-character  
passwords are the minimum  
requirement for authentication.  
Authentication  
MD5 or SHA based on MD5 No  
or SHA  
SNMP V3  
Provides authentication based on  
HMAC-MD5 or HMAC-SHA  
algorithms, and data encryption  
key. 8-character passwords and a  
data encryption key are the  
Authentication  
MD5 or SHA based on MD5  
or SHA  
Data encryption  
key  
minimum requirements for  
authentication and encryption.  
These parameters are configured on the SNMP page. A more detailed explanation of each  
parameter is given below the figure.  
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SNMP Read/Write Settings  
SNMP Versions  
Setting  
Description  
Factory Default  
V1, V2c, V3, or  
V1, V2c, or  
V3 only  
Select the SNMP protocol version used to  
manage the switch.  
V1, V2c  
V1, V2c Read Community  
Setting  
Description  
Factory Default  
Use a community string match with a  
maximum of 30 characters for  
authentication. This means that the SNMP  
agent accesses all objects with read-only  
permissions using the community string  
public.  
V1, V2c Read  
Community  
public  
V1, V2c Write/Read Community  
Setting  
Description  
Factory Default  
Uses a community string match with a  
maximum of 30 characters for  
authentication. This means that SNMP  
servers access all objects with read/write  
permissions using the community string  
private.  
V1, V2c  
Read/Write  
Community  
private  
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For SNMP V3, there are two levels of privilege for different accounts to access the EDS-726.  
Admin privilege allows access, and authorization to read and write the MIB file. User privilege  
only allows reading the MIB file, but not authorization to write.  
Admin Auth. Type (for SNMP V1, V2c, V3, and V3 only)  
Setting  
Description  
Factory Default  
Use admin. account to access objects.  
No authentication  
No-Auth  
No  
No  
Provide authentication based on the  
HMAC-MD5 algorithms. 8-character  
passwords are the minimum requirement  
for authentication.  
MD5-  
Auth  
Provide authentication based on the  
HMAC-SHA algorithms. 8-character  
passwords are the minimum requirement  
for authentication.  
SHA-  
Auth  
No  
Admin Data Encryption Key (for SNMP V1, V2c, V3, and V3 only)  
Setting  
Description  
Factory Default  
Factory Default  
8-character data encryption key is the  
minimum requirement for data encryption No  
(maximum of 30 characters)  
Enable  
Disable  
No data encryption  
No  
User Auth. Type (for SNMP V1, V2c, V3 and V3 only)  
Setting  
No-Auth  
Description  
Use admin account or user account to  
access objects. No authentication.  
No  
No  
Provides authentication based on the  
HMAC-MD5 algorithms. 8-character  
passwords are the minimum requirement  
for authentication.  
MD5-Auth  
SHA-Auth  
Provides authentication based on the  
HMAC-SHA algorithms. 8-character  
passwords are the minimum requirement  
for authentication.  
No  
User Data Encryption Key (for SNMP V1, V2c, V3 and V3 only)  
Setting  
Enable  
Disable  
Description  
Factory Default  
8-character data encryption key is the  
minimum requirement for data encryption No  
(maximum of 30 characters)  
No data encryption  
No  
Trap Settings  
Trap Server IP/Name  
Setting  
Description  
Factory Default  
None  
Enter the IP address or name of the Trap  
Server used by your network.  
IP or Name  
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EDS-726 Series User’s Manual  
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Trap Community  
Setting  
Description  
Factory Default  
Use a community string match for  
authentication (maximum of 30  
characters).  
character string  
public  
Private MIB information  
Switch Object ID  
Setting  
Description  
Factory Default  
Fixed  
8691.7.1  
EDS-726’s enterprise value  
NOTE: The Switch Object ID cannot be changed.  
Using Communication Redundancy  
Setting up Communication Redundancy on your network helps protect critical links against failure,  
protects against network loops, and keeps network downtime at a minimum.  
The Communication Redundancy function allows the user to set up redundant loops in the  
network to provide a backup data transmission route in the event that a cable is inadvertently  
disconnected or damaged. This is a particularly important feature for industrial applications, since  
it could take several minutes to locate the disconnected or severed cable. For example, if MOXA  
EDS-726 is used as a key communications component of a production line, several minutes of  
downtime could cause a big loss in production and revenue. MOXA EDS-726 supports two  
different protocols for this communication redundancy function—Rapid Spanning Tree Protocol  
(IEEE-802.1w) and Turbo Ring.  
Turbo Ring and STP/RSTP cannot both be used on the network at the same time. The table below  
lists the key differences between each feature. Use this information to evaluate the benefits of each,  
and then determine which features are most suitable for your network.  
Turbo Ring  
Ring  
STP  
RSTP  
Topology  
Ring, Mesh  
Up to 30 sec.  
Ring, Mesh  
Up to 5 sec  
Recovery Time  
< 300 ms  
Gigabit Ethernet Redundant Ring Capability (< 300 ms)  
Ethernet has become the default data communications medium for industrial automation  
applications. In fact, Ethernet is often used to integrate video, voice, and high-rate industrial  
application data transfers into one network. MOXA EDS-726, which comes equipped with a  
redundant Gigabit Ethernet protocol called Gigabit Turbo Ring, gives system maintainers a  
convenient means of setting up a versatile yet stable Gigabit Ethernet network. With Gigabit  
Turbo Ring, if any segment of the network gets disconnected, your automation system will be  
back to normal in under 300 ms.  
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Port trunking and Turbo Ring can be enabled simultaneously to form a backbone. Doing so will  
increase the bandwidth of the backbone, and also provide redundancy. For example, suppose that  
two physical ports, 1 and 2, are trunked to form trunk group Trk1, and then Trk1 is set as one  
Turbo Ring path. If port 1 gets disconnected, the remaining trunked port, port 2, will share the  
traffic. If port 1 and port 2 are both disconnected, Turbo Ring will create the back up path within  
300 ms.  
NOTE  
The Turbo Ring Concept  
The proprietary Turbo Ring protocol was developed by Moxa to optimize communication  
redundancy and achieve a faster recovery time on the network.  
Turbo Ring protocol identifies one switch as the “master” of the network, and then automatically  
blocks packets from traveling through any of the network’s redundant loops. In the event that one  
branch of this ring gets disconnected from the rest of the network, the Turbo Ring protocol  
automatically readjusts the ring (if possible) so that the part of the network that was disconnected  
reestablishes contact with the rest of the network.  
Initial Setup  
1. Select any two ports as redundant ports.  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
M
A
S
T
E
R
C
O
U
P
L
E
R
C
F
PORT  
PORT  
MODE  
EtherDevice Switch  
EDS-726  
3
4
3
1
4
2
3
4
3
4
4
3
4
2
3
TX  
RX  
TX  
X  
TX  
RX  
TX  
X  
TX  
RX  
2. Connect the redundant ports to form the  
Turbo Ring  
1
2
1
2
1
TX  
RX  
X  
X  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
AT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
M
A
S
T
E
R
C
O
U
P
L
E
R
C
F
PORT  
PORT  
M
A
S
T
E
R
C
O
U
P
L
E
R
C
F
PORT  
PORT  
MOD
MODE  
EtherDevice Switch  
EDS-726  
EtherDevice Switch  
EDS-726  
3
4
2
3
1
4
2
3
4
3
4
4
3
4
2
3
1
4
2
3
4
3
4
4
3
1
4
2
3
3
1
4
2
3
T
TX  
RX  
X  
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
X  
X  
TX  
RX  
1
1
1
2
1
2
1
2
1
2
1
2
1
2
TX  
TX  
RX  
TX  
RX  
TX  
IM-1GTX  
1GSXSC  
IM-4TX  
T  
MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
IM-1GTX  
M-1GSXSC  
IM-4TX  
MST  
IM-
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
You do not need to set the Master to use Turbo Ring. Master is only needed to identify which  
segment acts as the backup path. The actual topology of the redundant ring, i.e., which segment  
will be blocked, is determined by the number of EDS-726 switches that make up the ring, and  
where the “Ring Master” is located.  
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When the number of EDS-726 units in the Turbo Ring is even.  
Master  
If there are 2N EDS-726 units (an even number)  
in the Turbo Ring, then the backup segment is  
one of the two segments connected to the  
(N+1)st EDS-726 (i.e., the EDS-726 unit directly  
opposite the Master).  
PWR1  
P
W
R
2
F
A
U
L
T
S
P
E
E
D
F
D
X
/
H
D
X
P3  
P4  
P3  
P4  
P3  
P4  
P3  
P4  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
R
I
N
G
C
O
U
P
L
E
R
M
A
S
T
E
R
C
O
U
P
L
E
R
C
F
PORT  
PORT  
P1  
P2  
P1  
P2  
P1  
P2  
P1  
P2  
MODE  
EtherDevice Switch  
EDS-726  
3
4
3
4
3
4
3
4
4
3
4
3
TX  
RX  
X  
X  
T
X  
X  
TX  
RX  
1
2
1
2
1
2
1
2
1
2
1
2
TX  
RX  
TX  
X  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
-4MST  
MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
AT  
NK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
M
A
S
T
E
R
C
O
U
P
L
E
R
C
F
PORT  
PORT  
M
A
S
T
E
R
C
O
U
P
L
E
R
C
F
PORT  
PORT  
MO
MODE  
EtherDevice Switch  
EDS-726  
EtherDevice tch  
EDS-726  
3
4
3
4
3
4
3
4
4
3
4
3
1
4
2
3
4
3
4
4
3
1
4
2
3
3
1
4
2
3
TX  
TX  
RX  
TX  
X  
TX  
RX  
TX  
RX  
TX  
RX  
TX  
X  
TX  
RX  
TX  
X  
TX  
RX  
1
1
2
1
2
1
2
1
2
1
2
1
2
TX  
RX  
TX  
RX  
T
X  
IM-1GTX  
-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
PWR1  
P
W
R
2
F
A
U
L
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SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P4  
P2  
P3  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
M
A
S
T
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C
O
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P
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F
PORT  
PORT  
P1  
P1  
MODE  
EtherDevice Switch  
EDS-726  
3
4
3
1
4
2
3
4
3
4
4
3
4
2
3
TX  
RX  
TX  
X  
T
X  
X  
TX  
RX  
1
1
2
1
2
1
2
TX  
RX  
TX  
X  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
When the number of EDS-726 units in the Turbo Ring is odd.  
Master  
If there are 2N+1 EDS-726 units (an odd  
number) in the Turbo Ring, with EDS-726 units  
and segments labeled counterclockwise, then  
segment N+1 will serve as the backup path.  
PWR1  
P
W
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2
F
A
U
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S
P
E
E
D
F
D
X
/
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D
X
P3  
P4  
P3  
P4  
P3  
P4  
P3  
P4  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
R
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C
O
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P
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M
A
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P
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PORT  
PORT  
P1  
P2  
P1  
P2  
P1  
P2  
P1  
P2  
MODE  
EtherDevice Switch  
EDS-726  
3
4
3
4
3
4
3
4
4
3
4
3
TX  
RX  
TX  
X  
TX  
TX  
X  
TX  
RX  
1
2
1
2
1
2
2
1
TX  
RX  
X  
X  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
IM-4MST  
IM4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
For the example shown here, N=1, and therefore  
N+1=2.  
PWR1  
P
W
R
2
F
A
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SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
PWR1  
P
W
R
2
F
A
U
L
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SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
AT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
M
A
S
T
E
R
C
O
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P
L
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F
PORT  
PORT  
M
A
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P
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PORT  
PORT  
MODE  
MODE  
EtherDevice Switch  
EDS-726  
EtherDevice Switch  
EDS-726  
3
4
2
3
1
4
2
3
4
3
4
4
3
4
2
3
1
4
2
3
4
3
4
4
3
1
4
2
3
3
1
4
2
3
TX  
RX  
T
X  
TX  
RX  
TX  
RX  
TX  
RX  
T
X  
TX  
RX  
X  
X  
TX  
RX  
1
1
1
2
1
2
1
2
1
2
1
2
1
2
TX  
TX  
RX  
TX  
RX  
TX  
X  
IM-1GTX  
-1GSXSC  
IM-4TX  
IM-
4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
-4MST  
I-SC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
Segment N+1  
For some systems, it may not be convenient to connect all devices in the system to make one BIG  
redundant ring, since some devices could be located in a remote area. The “Ring Coupling”  
function of Turbo Ring can help you separate those distributed devices into different smaller  
redundant rings, but in such a way that they can still communicate with each other. The figure  
below illustrates how to couple two Turbo Rings.  
ATTENTION  
In a VLAN environment, you must set “Redundant Port,” “Coupling Port,” and “Coupling  
Control Port” as “Trunk Port,” since these ports act as the “backbone” to transmit all packets of  
different VLANs to different EDS-726 units.  
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Ring Coupling  
Featured Functions  
Switch B  
PWR1  
P
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P
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F
D
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P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
PWR1  
P
W
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2
F
A
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L
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SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
Main Path  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
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PORT  
PORT  
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PORT  
PORT  
MODE  
MODE  
EDevice Switch  
EDS-726  
EtherDevice Switch  
EDS-726  
3
4
3
4
3
4
3
4
4
3
4
2
3
1
4
3
4
3
4
4
3
4
3
3
4
2
3
TX  
TX  
TX  
TX  
TX  
RX  
TX  
X  
TX  
TX  
RX  
TX  
X  
TX  
RX  
RX  
X  
RX  
1
2
1
2
1
2
1
2
1
2
1
1
2
1
2
1
2
TX  
RX  
X  
X  
X  
X  
IM-1GTX  
IM-1GSXSC  
M-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
IM-1GTX  
M-1GSXSC  
IM-4TX  
IM-4MST  
M-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
Coupling  
Control Port  
PWR1  
P
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2
F
A
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SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
PWR1  
P
W
R
2
F
A
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L
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SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
M
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P
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PORT  
PORT  
M
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P
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PORT  
PORT  
MODE  
MODE  
EtherDevice Switch  
EDS-726  
EtherDevice Switch  
EDS-726  
3
4
2
3
1
4
2
3
4
3
4
4
3
4
2
3
1
4
2
3
4
3
4
4
3
4
2
3
3
1
4
2
3
X  
X  
TX  
RX  
X  
X  
X  
TX  
RX  
TX  
RX  
TX  
RX  
X  
X  
TX  
RX  
1
1
1
1
2
1
2
1
2
1
2
1
2
1
2
TX  
X  
TX  
RX  
TX  
RX  
TX  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
MST  
-4MS
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
MST  
IM-
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
Backup Path  
PWR1  
P
W
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2
F
A
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SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P4  
P2  
P3  
P4  
P2  
P3  
P1  
P4  
P2  
PWR1  
P
W
R
2
F
A
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SPEED FDX/HDX  
LNK/ACT  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
SAT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
R
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PORT  
PORT  
P1  
P1  
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P
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P
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MODE  
MO
EtherDevice Switch  
EDS-726  
EtherDevice Switch  
EDS-726  
3
1
4
2
3
1
4
2
3
4
3
4
4
3
1
4
2
3
1
4
2
3
4
3
4
4
3
4
2
3
3
1
4
2
3
TX  
X  
TX  
RX  
T
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
1
1
2
1
2
1
2
1
2
1
2
1
2
TX  
X  
TX  
TX  
TX  
RX  
IM-1GTX  
M-1GSXSC  
IM-4TX  
MST  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
IM-1GTX  
I-1GSXSC  
IM-4TX  
-MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
Coupling Port  
Switch A: "Coupler"  
Switch C  
To support the Ring Coupling function, select one EDS-726 (e.g., Switch A in the above figure) in  
the Turbo Ring and enter the Communication Redundancy page to enable “Ring Coupling.” Select  
one port as “coupling port” and then connect any port of the opposing EDS-726 (e.g., Switch C) in  
the adjacent Turbo Ring. Select another port as “coupling control port,” and connect this port to  
any port of the adjacent EDS-726 (e.g., Switch B) in the same Turbo Ring. The “Coupler” switch  
(Switch A above) will monitor switch B’s order from the “coupling control port” to decide if the  
coupling port’s backup path should be recovered.  
ATTENTION  
You only need to enable the “Ring Coupling” function on one EDS-726 (not on the opposing  
EDS-726 or an adjacent EDS-726). The Redundant Port, Coupling Port, and Coupling Control  
Port must all be assigned to different ports.  
A particular EDS-726 does not need to be configured for both Ring Coupling and Ring Master.  
NOTE  
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Featured Functions  
Configuring Turbo Ring  
Use the Communication Redundancy page to configure Turbo Ring.  
Now Active  
This field shows which communication protocol is in use: Turbo Ring, RSTP, or neither.  
Master/Slave  
This field appears only when Turbo Ring mode is selected for Redundancy Protocol. It indicates if  
this EDS-726 is or is not the Master of the Turbo Ring.  
The user does not need to set the master to use Turbo Ring, only to assign which segment serves  
as the backup path.  
NOTE  
The master will be determined automatically if the user does not set a dedicated master for the  
Turbo Ring.  
Redundant Port Status  
This field indicates the current status of redundant ports. The state is “Forwarding” for normal  
transmission, “Blocked” to stopped transmission if this port is the backup path, and “Link down”  
for non-connection.  
Ring Coupling  
Indicates if the Ring Coupling function is “Enabled” or “Disabled.”  
Coupling Port Status  
This field indicates the current status of coupling ports. The state is “Forwarding” for normal  
transmission, “Blocked” to stop transmission if this port is the backup path, and “Link down” for  
non-connection.  
At the bottom of the page, the user can configure this function’s “Settings.” For Turbo Ring, the  
user can configure:  
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Featured Functions  
Redundancy Protocol  
Setting  
Description  
Factory Default  
Select this item to change to the  
Turbo Ring configuration page.  
Turbo Ring  
None  
None  
RSTP (IEEE  
802.1W/1D)  
Select this item to change to the  
RSTP configuration page.  
Set as Master  
Setting  
Description  
Factory Default  
Factory Default  
Enable/Disable  
Select this EDS-726 as Master  
None  
Redundant Ports  
Setting  
Description  
Select any port of EDS-726 to be  
one of the redundant ports.  
Port 7 if enabled for  
Turbo Ring  
1st Port  
Select any port of EDS-726 to be  
one of the redundant ports.  
Port 8 if enabled for  
Turbo Ring  
2nd Port  
Enable Ring Coupling  
Setting  
Description  
Factory Default  
Enable/Disable  
Select this EDS-726 as Coupler  
None  
Coupling Ports  
Setting  
Description  
Factory Default  
Select any port of EDS-726 to be  
the coupling port  
Port 5 if enabled for  
Ring Coupling  
Coupling Port  
Select any port of EDS-726 to be  
the coupling control port  
Port 6 if enabled for  
Ring Coupling  
Coupling Control Port  
The STP/RSTP Concept  
Spanning Tree Protocol (STP) was designed to help reduce link failures in a network, and provide  
protection from loops. Networks that have a complicated architecture are prone to broadcast  
storms caused by unintended loops in the network. MOXA EDS-726’s STP feature is disabled by  
default. To be completely effective, you must enable RSTP/STP on every EDS-726 connected to  
your network.  
Rapid Spanning Tree Protocol (RSTP) implements the Spanning Tree Algorithm and Protocol  
defined by IEEE Std 802.1w-2001. RSTP provides the following benefits:  
y
y
The topology of a bridged network will be determined much more quickly compared to STP.  
RSTP is backward compatible with STP, making it relatively easy to deploy. For example:  
¾
¾
Defaults to sending 802.1D style BPDUs if packets with this format are received.  
STP (802.1D) and RSTP (802.1w) can operate on different ports of the same EDS-726.  
This feature is particularly helpful when EDS-726 ports connect to older equipment, such  
as legacy switches.  
You get essentially the same functionality with RSTP and STP. To see how the two systems differ,  
see the Differences between RSTP and STP section in this chapter.  
The STP protocol is part of the IEEE Std 802.1D, 1998 Edition bridge specification. The  
explanation given below uses bridge instead of switch.  
NOTE  
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What is STP?  
Featured Functions  
STP (802.1D) is a bridge-based system that is used to implement parallel paths for network traffic.  
STP uses a loop-detection process to:  
y
y
Locate and then disable less efficient paths (i.e., paths that have a lower bandwidth).  
Enable one of the less efficient paths if the most efficient path fails.  
The figure below shows a network made up of three LANs separated by three bridges. Each  
segment uses at most two paths to communicate with the other segments. Since this configuration  
can give rise to loops, the network will overload if STP is NOT enabled.  
LAN 1  
Bridge B  
LAN 2  
Bridge A  
Bridge C  
LAN 3  
If STP is enabled, it will detect duplicate paths and prevent, or block, one of them from forwarding  
traffic. In the following example, STP determined that traffic from LAN segment 2 to LAN  
segment 1 should flow through Bridges C and A because this path has a greater bandwidth and is  
therefore more efficient.  
LAN 1  
Bridge B  
LAN 2  
LAN 3  
Bridge A  
Bridge C  
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Featured Functions  
What happens if a link failure is detected? As shown in next figure, the STP process reconfigures  
the network so that traffic from LAN segment 2 flows through Bridge B.  
LAN 1  
Bridge B  
LAN 2  
Bridge A  
Bridge C  
LAN 3  
STP will determine which path between each bridged segment is most efficient, and then assign a  
specific reference point on the network. When the most efficient path has been identified, the other  
paths are blocked. In the above 3 figures, STP first determined that the path through Bridge C was  
the most efficient, and as a result, blocked the path through Bridge B. After the failure of Bridge C,  
STP re-evaluated the situation and opened the path through Bridge B.  
How STP Works  
When enabled, STP determines the most appropriate path for traffic through a network. The way it  
does this is outlined in the sections below.  
STP Requirements  
Before STP can configure the network, the system must satisfy the following requirements:  
y
Communication between all the bridges. This communication is carried out using Bridge  
Protocol Data Units (BPDUs), which are transmitted in packets with a known multicast  
address.  
y
Each bridge must have a Bridge Identifier that specifies which bridge acts as the central  
reference point, or Root Bridge, for the STP system—bridges with a lower Bridge Identifier  
are more likely to be designated as the Root Bridge. The Bridge Identifier is calculated using  
the MAC address of the bridge and a priority defined for the bridge. The default priority of  
EDS-726 is 32768.  
y
Each port has a cost that specifies the efficiency of each link. The efficiency cost is usually  
determined by the bandwidth of the link, with less efficient links assigned a higher cost. The  
following table shows the default port costs for a switch:  
Port Speed  
Path Cost 802.1D,  
1998 Edition  
Path Cost  
802.1w-2001  
10 Mbps  
100  
19  
4
2,000,000  
200,000  
20,000  
100 Mbps  
1000 Mbps  
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Featured Functions  
STP Calculation  
The first step of the STP process is to perform calculations. During this stage, each bridge on the  
network transmits BPDUs. The following items will be calculated:  
y
y
y
Which bridge should be the Root Bridge. The Root Bridge is the central reference point from  
which the network is configured.  
The Root Path Costs for each bridge. This is the cost of the paths from each bridge to the Root  
Bridge.  
The identity of each bridge’s Root Port. The Root Port is the port on the bridge that connects  
to the Root Bridge via the most efficient path. In other words, the port connected to the Root  
Bridge via the path with the lowest Root Path Cost. The Root Bridge, however, does not have  
a Root Port.  
y
The identity of the Designated Bridge for each LAN segment. The Designated Bridge is the  
bridge with the lowest Root Path Cost from that segment. If several bridges have the same  
Root Path Cost, the one with the lowest Bridge Identifier becomes the Designated Bridge.  
Traffic transmitted in the direction of the Root Bridge will flow through the Designated  
Bridge. The port on this bridge that connects to the segment is called the Designated Bridge  
Port.  
STP Configuration  
After all the bridges on the network agree on the identity of the Root Bridge, and all other relevant  
parameters have been established, each bridge is configured to forward traffic only between its  
Root Port and the Designated Bridge Ports for the respective network segments. All other ports are  
blocked, which means that they will not be allowed to receive or forward traffic.  
STP Reconfiguration  
Once the network topology has stabilized, each bridge listens for Hello BPDUs transmitted from  
the Root Bridge at regular intervals. If a bridge does not receive a Hello BPDU after a certain  
interval (the Max Age time), the bridge assumes that the Root Bridge, or a link between itself and  
the Root Bridge, has gone down. This will trigger the bridge to reconfigure the network to account  
for the change. If you have configured an SNMP trap destination, when the topology of your  
network changes, the first bridge to detect the change sends out an SNMP trap.  
Differences between RSTP and STP  
RSTP is similar to STP, but includes additional information in the BPDUs that allow each bridge  
to confirm that it has taken action to prevent loops from forming when it decides to enable a link  
to a neighboring bridge. Adjacent bridges connected via point-to-point links will be able to enable  
a link without waiting to ensure that all other bridges in the network have had time to react to the  
change. The main benefit of RSTP is that the configuration decision is made locally rather than  
network-wide, allowing RSTP can carry out automatic configuration and restore a link faster than  
STP.  
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STP Example  
Featured Functions  
The LAN shown below has three segments, with adjacent segments connected using two possible  
links. The various STP factors, such as Cost, Root Port, Designated Bridge Port, and Blocked Port  
are shown in the figure.  
LAN Segment 1  
Port 1  
Port 1  
Port 1  
(Root Port)  
(Root Port)  
(Designated  
Bridge Port)  
Cost =100  
Cost =100  
Bridge B  
Bridge X  
Port 2  
Bridge A  
Port 2  
Port 2  
(Designated  
Bridge Port)  
(Blocked Port)  
(Root Bridge)  
LAN Segment 2  
Port 1  
(Root Port)  
Cost =100  
Port 1  
(Root Port)  
Cost =200  
Bridge C  
Bridge Y  
Port 2  
Port 2  
(Designated  
Bridge Port)  
(Blocked Port)  
LAN Segment 3  
y
y
y
y
Bridge A has been selected as the Root Bridge, since it was determined to have the lowest  
Bridge Identifier on the network.  
Since Bridge A is the Root Bridge, it is also the Designated Bridge for LAN segment 1. Port 1  
on Bridge A is selected as the Designated Bridge Port for LAN Segment 1.  
Ports 1 of Bridges B, C, X, and Y are all Root Ports sine they are nearest to the Root Bridge,  
and therefore have the most efficient path.  
Bridges B and X offer the same Root Path Cost for LAN segment 2. However, Bridge B was  
selected as the Designated Bridge for that segment since it has a lower Bridge Identifier. Port  
2 on Bridge B is selected as the Designated Bridge Port for LAN Segment 2.  
y
Bridge C is the Designated Bridge for LAN segment 3, because it has the lowest Root Path  
Cost for LAN Segment 3:  
¾
¾
The route through Bridges C and B costs 200 (C to B=100, B to A=100)  
The route through Bridges Y and B costs 300 (Y to B=200, B to A=100)  
y
The Designated Bridge Port for LAN Segment 3 is Port 2 on Bridge C.  
Using STP on a Network with Multiple VLANs  
IEEE Std 802.1D, 1998 Edition, does not take into account VLANs when calculating STP  
information—the calculations only depend on the physical connections. Consequently, some  
network configurations will result in VLANs being subdivided into a number of isolated sections  
by the STP system. You must ensure that every VLAN configuration on your network takes into  
account the expected STP topology and alternative topologies that may result from link failures.  
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The following figure shows an example of a network that contains VLANs 1 and 2. The VLANs  
are connected using the 802.1Q-tagged link between Switch B and Switch C. By default, this link  
has a port cost of 100 and is automatically blocked because the other Switch-to-Switch  
connections have a port cost of 36 (18+18). This means that both VLANs are now  
subdivided—VLAN 1 on Switch units A and B cannot communicate with VLAN 1 on Switch C,  
and VLAN 2 on Switch units A and C cannot communicate with VLAN 2 on Switch B.  
Switch A  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
R
I
N
G
C
O
U
P
L
E
R
MASTER COUPLER CF  
PORT  
PORT  
MOD
EtrDevice Switch  
EDS-726  
3
4
3
4
3
4
3
4
4
3
4
3
X  
X  
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
1
2
1
2
1
2
1
2
1
2
1
2
X  
X  
TX  
RX  
IM-1GTX  
M-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
100BaseTX  
100BaseTX  
full-duplex Link;  
only carries VLAN1  
(path cost = 18)  
full-duplex Link;  
only carries VLAN2  
(path cost = 18)  
Switch B  
Switch C  
Block  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P3  
P4  
P3  
P4  
P3  
P4  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P3  
P4  
P3  
P4  
P3  
P4  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
TAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
MASTER COUPLER CF  
PORT  
PORT  
P2  
P1  
P2  
P1  
P2  
P1  
P2  
MASTER COUPLER CF  
PORT  
PORT  
P2  
P1  
P2  
P1  
P2  
P1  
P2  
MODE  
MOE  
EtheDevice Sitch  
EDS-726  
EtherDevicSich  
EDS-726  
3
4
2
3
1
4
3
4
3
4
4
3
4
2
3
1
4
2
3
4
3
4
4
3
1
4
2
3
3
1
4
2
3
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
TX  
X  
TX  
X  
TX  
RX  
TX  
RX  
1
2
1
1
2
1
2
1
2
1
2
1
2
1
2
TX  
RX  
TX  
RX  
X  
RX  
X  
X  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
802.1Q tagged,  
10BaseTx  
half-duplex Link  
carries VLAN1, 2  
(path cost = 100)  
To avoid subdividing VLANs, all inter-switch connections should be made members of all  
available 802.1Q VLANs. This will ensure connectivity at all times. For example, the connections  
between Switches A and B, and between Switches A and C should be 802.1Q tagged and carrying  
VLANs 1 and 2 to ensure connectivity.  
See the “Configuring Virtual LANs” section for more information about VLAN Tagging.  
Configuring STP/RSTP  
The following figures indicate which Spanning Tree Protocol parameters can be configured. A  
more detailed explanation of each parameter is given below the figure.  
At the top of this page, the user can check the “Current Status” of this function. For RSTP, you  
will see:  
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Now Active:  
This field will show which communication protocol is being used—Turbo Ring, RSTP, or neither.  
Root/Not Root  
This field will appear only when selected to operate in RSTP mode. It indicates whether or not this  
EDS-726 is the Root of the Spanning Tree (the root is determined automatically).  
At the bottom of this page, the user can configure the “Settings” of this function. For RSTP, you  
can configure:  
Protocol of Redundancy  
Setting  
Turbo Ring  
Description  
Factory Default  
Select this item to change to the Turbo Ring  
configuration page.  
None  
RSTP (IEEE 802.1W/1D) Select this item to change to the RSTP  
configuration page.  
None  
Bridge priority  
Setting  
Description  
Factory Default  
Numerical value selected  
by user  
Increase this device’s bridge priority by  
selecting a lower number. A device with a  
higher bridge priority has a greater chance of  
being established as the root of the Spanning  
Tree topology.  
32768  
Forwarding Delay  
Setting  
Description  
Factory Default  
Numerical value input by  
user  
The amount of time this device waits before  
checking to see if it should change to a  
different state.  
15 (sec.)  
Hello time (sec.)  
Setting  
Description  
Factory Default  
Numerical value input by  
user  
The root of the Spanning Tree topology  
periodically sends out a “hello” message to  
other devices on the network to check if the  
topology is healthy. The “hello time” is the  
amount of time the root waits between sending  
hello messages.  
2
Max. Age (sec.)  
Setting  
Description  
Factory Default  
Numerical value input by  
user  
If this device is not the root, and it has not  
received a hello message from the root in an  
amount of time equal to “Max. Age,” then this  
device will reconfigure itself as a root. Once  
two or more devices on the network are  
recognized as a root, the devices will  
renegotiate to set up a new Spanning Tree  
topology.  
20  
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Enable STP per Port  
Setting  
Description  
Factory Default  
Enable/Disable  
Select to enable the port as a node on the  
Spanning Tree topology.  
Disabled  
We suggest not enabling the Spanning Tree Protocol once the port is connected to a device (PLC,  
RTU, etc.) as opposed to network equipment. The reason is that it will cause unnecessary  
negotiation.  
NOTE  
Port Priority  
Setting  
Description  
Factory Default  
128  
Numerical value selected  
by user  
Increase this port’s priority as a node on the  
Spanning Tree topology by inputting a lower  
number.  
Port Cost  
Setting  
Description  
Factory Default  
Numerical value input by  
user  
Input a higher cost to indicate that this port is  
less suitable as a node for the Spanning Tree  
topology.  
200000  
Port Status  
Indicates the current Spanning Tree status of this port. “Forwarding” for normal transmission, or  
“Blocking” to block transmission.  
Configuration Limits of RSTP/STP  
The Spanning Tree Algorithm places limits on three of the configuration items described above:  
[Eq. 1]: 1 sec Hello Time 10 sec  
[Eq. 2]: 6 sec Max. Age 40 sec  
[Eq. 3]: 4 sec Forwarding Delay 30 sec  
These three variables are further restricted by the following two inequalities:  
[Eq. 4]: 2 * (Hello Time + 1 sec) Max. Age 2 * (Forwarding Delay – 1 sec)  
MOXA EDS-726’s firmware will alert you immediately if any of these restrictions are violated.  
For example, setting  
Hello Time = 5 sec, Max. Age = 20 sec, and Forwarding Delay = 4 sec does not violate Eqs. 1  
through 3, but does violate Eq. 4, since in this case,  
2 * (Hello Time + 1 sec) = 12 sec, and 2 * (Forwarding Delay – 1 sec) = 6 sec.  
You can remedy the situation in any number of ways. One solution is simply to increase the  
Forwarding Delay value to at least 11 sec.  
HINT: Take the following steps to avoid guessing:  
Step 1: Assign a value to “Hello Time” and then calculate the left most part of Eq. 4 to get the  
lower limit of “Max. Age.”  
Step 2: Assign a value to “Forwarding Delay” and then calculate the right most part of Eq. 4 to  
get the upper limit for “Max. Age.”  
Step 3: Assign a value to “Forwarding Delay” that satisfies the conditions in Eq. 3 and Eq. 4.  
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Using Traffic Prioritization  
EDS-726’s traffic prioritization capability provides Quality of Service (QoS) to your network by  
making data delivery more reliable. You can prioritize traffic on your network to ensure that high  
priority data is transmitted with minimum delay. Traffic can be controlled by a set of rules to  
obtain the required Quality of Service for your network. The rules define different types of traffic  
and specify how each type should be treated as it passes through the switch. MOXA EDS-726 can  
inspect both IEEE 802.1p/1Q layer 2 CoS tags, and even layer 3 TOS information to provide  
consistent classification of the entire network. EDS-726’s QoS capability improves the  
performance and determinism of industrial networks for mission critical applications.  
The Traffic Prioritization Concept  
What is Traffic Prioritization?  
Traffic prioritization allows you to prioritize data so that time-sensitive and system-critical data  
can be transferred smoothly and with minimal delay over a network. The benefits of using traffic  
prioritization are:  
y
y
y
y
Improve network performance by controlling a wide variety of traffic and managing  
congestion.  
Assign priorities to different categories of traffic. For example, set higher priorities for  
time-critical or business-critical applications.  
Provide predictable throughput for multimedia applications, such as video conferencing or  
voice over IP, and minimize traffic delay and jitter.  
Improve network performance as the amount of traffic grows. This will save cost by reducing  
the need to keep adding bandwidth to the network.  
How Traffic Prioritization Works  
Traffic prioritization uses the four traffic queues that are present in your EDS-726 to ensure that  
high priority traffic is forwarded on a different queue from lower priority traffic. This is what  
provides Quality of Service (QoS) to your network.  
EDS-726 traffic prioritization depends on two industry-standard methods:  
y
y
IEEE 802.1D—a layer 2 marking scheme.  
Differentiated Services (DiffServ)—a layer 3 marking scheme.  
IEEE 802.1D Traffic Marking  
The IEEE Std 802.1D, 1998 Edition marking scheme, which is an enhancement to IEEE Std  
802.1D, enables Quality of Service on the LAN. Traffic service levels are defined in the IEEE  
802.1Q 4-byte tag, which is used to carry VLAN identification as well as IEEE 802.1p priority  
information. The 4-byte tag immediately follows the destination MAC address and Source MAC  
address.  
The IEEE Std 802.1D, 1998 Edition priority marking scheme assigns an IEEE 802.1p priority  
level between 0 and 7 to each frame. This determines the level of service that that type of traffic  
should receive. Refer to the table below for an example of how different traffic types can be  
mapped to the eight IEEE 802.1p priority levels.  
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IEEE 802.1p Priority Level  
IEEE 802.1D Traffic Type  
Best Effort (default)  
0
1
2
3
4
5
Background  
Standard (spare)  
Excellent Effort (business critical)  
Controlled Load (streaming multimedia)  
Video (interactive media); less than 100 milliseconds  
of latency and jitter  
6
7
Voice (interactive voice); less than 10 milliseconds of  
latency and jitter  
Network Control Reserved traffic  
Even though the IEEE 802.1D standard is the most widely used prioritization scheme in the LAN  
environment, it still has some restrictions:  
y
It requires an additional 4-byte tag in the frame, which is normally optional in Ethernet  
networks. Without this tag, the scheme cannot work.  
y
The tag is part of the IEEE 802.1Q header, so to implement QoS at layer 2, the entire network  
must implement IEEE 802.1Q VLAN tagging.  
It is only supported on a LAN and not across routed WAN links, since the IEEE 802.1Q tags are  
removed when the packets pass through a router.  
Differentiated Services (DiffServ) Traffic Marking  
DiffServ is a Layer 3 marking scheme that uses the DiffServ Code Point (DSCP) field in the IP  
header to store the packet priority information. DSCP is an advanced intelligent method of traffic  
marking because you can choose how your network prioritizes different types of traffic. DSCP  
uses 64 values that map to user-defined service levels, allowing you to establish more control over  
network traffic.  
Advantages of DiffServ over IEEE 802.1D are:  
y
Configure how you want your switch to treat selected applications and types of traffic by  
assigning various grades of network service to them.  
y
y
y
No extra tags are required in the packet.  
DSCP uses the IP header of a packet and therefore priority is preserved across the Internet.  
DSCP is backward compatible with IPV4 TOS, which allows operation with existing devices  
that use a layer 3 TOS enabled prioritization scheme.  
Traffic Prioritization  
EDS-726 classifies traffic based on layer 2 of the OSI 7 layer model, and the switch prioritizes  
received traffic according to the priority information defined in the received packet. Incoming  
traffic is classified based upon the IEEE 802.1D frame and is assigned to the appropriate priority  
queue based on the IEEE 802.1p service level value defined in that packet. Service level markings  
(values) are defined in the IEEE 802.1Q 4-byte tag, and consequently traffic will only contain  
802.1p priority markings if the network is configured with VLANs and VLAN tagging. The traffic  
flow through the switch is as follows:  
1. A packet received by the EDS-726 may or may not have an 802.1p tag associated with it. If it  
does not, then it is given a default 802.1p tag (which is usually 0). Alternatively, the packet  
may be marked with a new 802.1p value, which will result in all knowledge of the old 802.1p  
tag being lost.  
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2. Because the 802.1p priority levels are fixed to the traffic queues, the packet will be placed in  
the appropriate priority queue, ready for transmission through the appropriate egress port.  
When the packet reaches the head of its queue and is about to be transmitted, the device  
determines whether or not the egress port is tagged for that VLAN. If it is, then the new  
802.1p tag is used in the extended 802.1D header.  
The EDS-726 will check a packet received at the ingress port for IEEE 802.1D traffic  
classification, and then prioritize it based upon the IEEE 802.1p value (service levels) in that tag.  
It is this 802.1p value that determines which traffic queue the packet is mapped to.  
Traffic Queues  
The EDS-726 hardware has multiple traffic queues that allow packet prioritization to occur.  
Higher priority traffic can pass through the EDS-726 without being delayed by lower priority  
traffic. As each packet arrives in the EDS-726, it passes through any ingress processing (which  
includes classification, marking/re-marking), and is then sorted into the appropriate queue. The  
switch then forwards packets from each queue.  
EDS-726 supports two different queuing mechanisms:  
y
Weight Fair: This method services all the traffic queues, giving priority to the higher priority  
queues. Under most circumstances, this method gives high priority precedence over  
low-priority, but in the event that high-priority traffic exceeds the link capacity, lower priority  
traffic is not blocked.  
y
Strict: This method services high traffic queues first; low priority queues are delayed until no  
more high priority data needs to be sent. This method always gives precedence to high priority  
over low-priority.  
Configuring Traffic Prioritization  
Quality of Service (QoS) provides a traffic prioritization capability to ensure that important data is  
delivered consistently and predictably. EDS-726 Series can inspect IEEE 802.1p/1Q layer 2 CoS  
tags, and even layer 3 TOS information, to provide a consistent classification of the entire network.  
EDS-726 Series’ QoS capability improves your industrial network’s performance and determinism  
for mission critical applications.  
QoS Classification  
MOXA EDS-726 supports inspection of layer 3 TOS and/or layer 2 CoS tag information to  
determine how to classify traffic packets.  
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Queuing Mechanism  
Setting  
Description  
Factory Default  
Weighted Fair  
EDS-726 has 4 priority queues. In the weight fair  
scheme, an 8, 4, 2, 1 weighting is applied to the four  
priorities. This approach prevents the lower priority  
frames from being starved of opportunity for  
transmission with only a slight delay to the higher  
priority frames.  
Weight Fair  
Strict  
In the Strict-priority scheme, all top-priority frames  
egress a port until that priority’s queue is empty, and  
then the next lower priority queue’s frames egress. This  
approach can cause the lower priorities to be starved of  
opportunity for transmitting any frames but ensures all  
high priority frames to egress the switch as soon as  
possible.  
Inspect TOS  
Setting  
Description  
Factory Default  
Enable/Disable  
Check the checkbox to enable EDS-726 to inspect the  
Type of Service (TOS) bits in IPV4 frame to determine  
the priority of each frame.  
Enable  
Inspect COS  
Setting  
Description  
Factory Default  
Enable/Disable  
Check the check box to enable EDS-726 to inspect the  
802.1p COS tag in the MAC frame to determine the  
priority of each frame.  
Enable  
Default Port Priority  
Setting  
Description  
Factory Default  
Low/Normal/  
Medium/High  
Set the Port Default Priority of the ingress frames to  
different priority queues. If the received packets are not  
equipped with any tag information (CoS, TOS) the  
default port priority will take effect.  
Normal  
The priority of an ingress frame is determined in order by:  
NOTE  
NOTE  
1. Inspect TOS  
2. Inspect CoS  
3. Default Port Priority  
The designer can enable these classifications individually or in combination. For instance, if a  
‘hot,’ higher priority port is required for a network design, “Inspect TOS” and “Inspect CoS” can  
be disabled. This setting leaves only port default priority active, which results in all ingress  
frames being assigned the same priority on that port.  
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CoS Mapping  
Setting  
Description  
Factory  
Low/Normal/  
Medium/High  
Set the mapping table of different CoS values to 4  
different egress queues.  
0: Low  
1: Low  
2: Normal  
3: Normal  
4: Medium  
5: Medium  
6: High  
7: High  
TOS/DiffServ Mapping  
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Setting  
Description  
Factory Default  
Low/Normal/  
Medium/High  
Set the mapping table of different TOS values to 4  
different egress queues.  
1 to 16: Low  
17 to 32: Normal  
33 to 48: Medium  
49 to 64: High  
Using Virtual LAN  
Setting up Virtual LANs (VLANs) on your EDS-726 increases the efficiency of your network by  
dividing the LAN into logical segments, as opposed to physical segments. In general, VLANs are  
easier to manage.  
The Virtual LAN (VLAN) Concept  
What is a VLAN?  
A VLAN is a group of devices that can be located anywhere on a network, but which  
communicate as if they are on the same physical segment. With VLANs, you can segment your  
network without being restricted by physical connections—a limitation of traditional network  
design. As an example, with VLANs you can segment your network according to:  
y
y
y
Departmental groups—You could have one VLAN for the Marketing department, another  
for the Finance department, and another for the Development department.  
Hierarchical groups—You could have one VLAN for directors, another for managers, and  
another for general staff.  
Usage groups—You could have one VLAN for e-mail users, and another for multimedia  
users.  
Switch A  
5
6
7
8
1
2
3
4
Backbone connects multiple switches  
Switch B  
5
6
7
8
1
2
3
4
Department 3  
VLAN 3  
Department 1  
VLAN 1  
Department 2  
VLAN 2  
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Benefits of VLANs  
Featured Functions  
The main benefit of VLANs is that they provide a network segmentation system that is far more  
flexible than traditional networks. Using VLANs also provides you with three other benefits:  
y
VLANs ease the relocation of devices on networks: With traditional networks, network  
administrators spend much of their time dealing with moves and changes. If users move to a  
different subnetwork, the addresses of each host must be updated manually. With a VLAN  
setup, if a host on VLAN Marketing, for example, is moved to a port in another part of the  
network, and retains its original subnet membership, you only need to specify that the new  
port is on VLAN Marketing. You do not need to carry out any re-cabling.  
y
y
VLANs provide extra security: Devices within each VLAN can only communicate with  
other devices on the same VLAN. If a device on VLAN Marketing needs to communicate  
with devices on VLAN Finance, the traffic must pass through a routing device or Layer 3  
switch.  
VLANs help control traffic: With traditional networks, congestion can be caused by  
broadcast traffic that is directed to all network devices, regardless of whether or not they need  
it. VLANs increase the efficiency of your network because each VLAN can be set up to  
contain only those devices that need to communicate with each other.  
VLANs and MOXA EtherDevice Switch  
Your EDS-726 provides support for VLANs using IEEE Std 802.1Q-1998. This standard allows  
traffic from multiple VLANs to be carried across one physical link. The IEEE Std 802.1Q-1998  
standard allows each port on your EDS-726 to be placed in:  
y
y
Any one VLAN defined on the EDS-726.  
Several VLANs at the same time using 802.1Q tagging.  
The standard requires that you define the 802.1Q VLAN ID about each VLAN on your EDS-726  
before the switch can use it to forward traffic:  
Managing a VLAN  
A new or initialized EDS-726 contains a single VLAN—the Default VLAN. This VLAN has the  
following definition:  
y
y
VLAN Name—Management VLAN  
802.1Q VLAN ID—1 (if tagging is required)  
All the ports are initially placed in this VLAN, and it is the only VLAN that allows you to access  
the management software of the EDS-726 over the network.  
Communication Between VLANs  
If devices connected to a VLAN need to communicate to devices on a different VLAN, a router or  
Layer 3 switching device with connections to both VLANs needs to be installed. Communication  
between VLANs can only take place if they are all connected to a routing or Layer 3 switching  
device.  
VLANs: Tagged and Untagged Membership  
Your EDS-726 supports 802.1Q VLAN tagging, a system that allows traffic for multiple VLANs  
to be carried on a single physical (backbone, trunk) link. When setting up VLANs you need to  
understand when to use untagged and tagged membership of VLANs. Simply put, if a port is on a  
single VLAN it can be an untagged member, but if the port needs to be a member of multiple  
VLANs, tagged membership must be defined.  
A typical host (e.g., clients) will be untagged members of one VLAN, defined as “Access Port” in  
EDS-726, while inter-switch connections will be tagged members of all VLANs, defined as  
“Trunk Port” in EDS-726.  
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The IEEE Std 802.1Q-1998 defines how VLANs operate within an open packet-switched network.  
An 802.1Q compliant packet carries additional information that allows a switch to determine  
which VLAN the port belongs to. If a frame is carrying the additional information, it is known as a  
tagged frame.  
To carry multiple VLANs across a single physical (backbone, trunk) link, each packet must be  
tagged with a VLAN identifier so that the switches can identify which packets belong in which  
VLAN. To communicate between VLANs, a router must be used.  
MOXA EDS-726 supports two types of VLAN port settings:  
y
Access Port: The port connects to a single device that is not tagged. The user must define the  
default port PVID that assigns which VLAN the device belongs to. Once the ingress packet of  
this Access Port egresses to another Trunk Port (the port needs all packets to carry tag  
information), EDS-726 will insert this PVID into this packet to help the next 802.1Q VLAN  
switch recognize it.  
y
Trunk Port: The port connects to a LAN that consists of untagged devices/tagged devices  
and/or switches and hubs. In general, the traffic of the Trunk Port must have a Tag. Users can  
also assign PVID to a Trunk Port. The untagged packet on the Trunk Port will be assigned the  
port default PVID as its VID.  
The following section illustrates how to use these ports to set up different applications.  
Sample Applications of VLANs using MOXA EDS-726  
Device I  
VLAN 4 Untagged  
Device  
Port 7 (Access Port  
Device A  
VLAN 5 Untagged Device  
PVID 4)  
Switch A  
Switch B  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
P3  
P4  
P3  
P4  
P3  
P4  
P3  
P4  
P3  
P4  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
R
I
N
G
C
O
U
P
L
E
R
R
I
N
G
C
O
U
P
L
E
R
MASTER COUPLER CF  
PORT  
PORT  
MASTER COUPLER CF  
PORT  
PORT  
P1  
P2  
P1  
P2  
P1  
P2  
P1  
P2  
P1  
P2  
Port 3 (Trunk Port, PVID 1)  
MODE  
MODE  
Port 5 (Access Port  
PVID 3)  
EtherDevice Switch  
EDS-726  
terDeiSwitch  
EDS-726  
3
4
3
4
3
4
3
4
4
3
4
3
4
3
4
3
4
4
3
4
3
3
4
3
X  
TX  
TX  
X  
TX  
RX  
TX  
X  
X  
TX  
RX  
X  
RX  
RX  
RX  
X  
RX  
RX  
X  
2
1
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
X  
X  
TX  
RX  
TX  
RX  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
M-4MST  
M-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
IM-1GTX  
M-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
Port 1 (Access Port  
PVID 5)  
Device H  
VLAN 3 Untagged  
Device  
Port 2 (Trunk Port PVID 2,  
Fixed VLAN (Tagged)=3,4)  
Port 6 (Access Port PVID 5)  
Port 4 (Access  
Port PVID 2)  
HUB  
Device F  
Device G  
VLAN 2 Untagged  
Device  
VLAN 5 Untagged Device  
Device E  
VLAN 4 Tagged Device, VID 4  
Device D  
VLAN 3 Tagged Device, VID 3  
Device B  
VLAN 2 Untagged  
Device  
Device C  
VLAN 2 Untagged  
Device  
In this application,  
y
Port 1 connects a single untagged device and assigns it to VLAN 5; it should be configured as  
“Access Port” with PVID 5.  
y
Port 2 connects a LAN with two untagged devices belonging to VLAN 2. One tagged device  
with VID 3 and one tagged device with VID 4. It should be configured as “Trunk Port” with  
PVID 2 for untagged device and Fixed VLAN (Tagged) with 3 and 4 for tagged device. Since  
each port can only have one unique PVID, all untagged devices on the same port can only  
belong to the same VLAN.  
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y
y
y
y
y
Port 3 connects with another switch. It should be configured as “Trunk Port.” GVRP protocol  
will be used through the Trunk Port.  
Port 4 connects a single untagged device and assigns it to VLAN 2; it should be configured as  
“Access Port” with PVID 2.  
Port 5 connects a single untagged device and assigns it to VLAN 3; it should be configured as  
“Access Port” with PVID 3.  
Port 6 connect a single untagged device and assigns it to VLAN 5; it should be configured as  
“Access Port” with PVID 5.  
Port 7 connects a single untagged device and assigns it to VLAN 4; it should be configured as  
“Access Port” with PVID 4.  
After proper configuration:  
y
y
y
Packets from device A will travel through “Trunk Port 3” with tagged VID 5. Switch B will  
recognize its VLAN, pass it to port 6, and then remove tags received successfully by device G,  
and vice versa.  
Packets from device B and C will travel through “Trunk Port 3” with tagged VID 2. Switch B  
recognizes its VLAN, passes it to port 4, and then removes tags received successfully by  
device F, and vice versa.  
Packets from device D will travel through “Trunk Port 3” with tagged VID 3. Switch B will  
recognize its VLAN, pass to port 5, and then remove tags received successfully by device H.  
Packets from device H will travel through “Trunk Port 3” with PVID 3. Switch A will  
recognize its VLAN and pass it to port 2, but will not remove tags received successfully by  
device D.  
y
Packets from device E will travel through “Trunk Port 3” with tagged VID 4. Switch B will  
recognize its VLAN, pass it to port 7, and then remove tags received successfully by device I.  
Packets from device I will travel through “Trunk Port 3” with tagged VID 4. Switch A will  
recognize its VLAN and pass it to port 2, but will not remove tags received successfully by  
device E.  
Configuring 802.1Q VLAN  
VLAN Port Settings  
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To configure EDS-726 VLANs, use the VLAN Port Setting page to configure the ports.  
Port Type  
Setting  
Description  
Factory Default  
Access  
This port type is used to connect single devices without  
tags.  
Trunk  
Select “Trunk” port type to connect another 802.1Q  
VLAN aware switch or another LAN that combines  
tagged and/or untagged devices and/or other  
switches/hubs.  
Access  
ATTENTION  
For communication redundancy in the VLAN environment, set “Redundant Port,” “Coupling  
Port,” and “Coupling Control Port” as “Trunk Port,” since these ports act as the “backbone” to  
transmit all packets of different VLANs to different EDS-726 units.  
Management VLAN ID  
Setting  
VLAN ID  
Description  
Factory Default  
Set the management VLAN of this EDS-726.  
1
ranges from  
1 to 4094  
Port PVID  
Setting  
Description  
Factory Default  
VID range from 1 Set the port default VLAN ID for untagged devices that  
to 4094 connect to the port.  
1
Port Fixed VLAN List (Tagged)  
Setting  
Description  
Factory Default  
VID range from 1 This field will be active only when selecting the “Trunk” None  
to 4094  
port type. Set the other VLAN ID for tagged devices that  
connect to the “Trunk” port. Use commas to separate  
different VIDs.  
Port Forbidden VLAN List  
Setting  
Description  
Factory Default  
VID range from 1 This field will be active only when selecting the “Trunk” None  
to 4094  
port type. Set the VLAN IDs that will not be supported  
by this trunk port. Use commas to separate different  
VIDs.  
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VLAN Table  
In this table, you can review the VLAN groups that were created, Joined Access Ports, and Trunk  
Ports.  
The physical network can have a maximum of 64 VLAN settings.  
NOTE  
Using Multicast Filtering  
Multicast filtering improves the performance of networks that carry multicast traffic. This section  
explains multicasts, multicast filtering, and how multicast filtering can be implemented on your  
EDS-726.  
The Concept of Multicast Filtering  
What is an IP Multicast?  
A multicast is a packet sent by one host to multiple hosts. Only those hosts that belong to a  
specific multicast group will receive the multicast. If the network is set up correctly, a multicast  
can only be sent to an end-station or a subset of end-stations on a LAN or VLAN that belong to  
the multicast group. Multicast group members can be distributed across multiple subnetworks, so  
that multicast transmissions can occur within a campus LAN or over a WAN. In addition,  
networks that support IP multicast send only one copy of the desired information across the  
network until the delivery path that reaches group members diverges. To make more efficient use  
of network bandwidth, it is only at these points that multicast packets are duplicated and  
forwarded. A multicast packet has a multicast group address in the destination address field of the  
packet’s IP header.  
Benefits of Multicast  
The benefits of using IP multicast are that it:  
y
y
y
y
Uses the most efficient, sensible method to deliver the same information to many receivers  
with only one transmission.  
Reduces the load on the source (for example, a server) since it will not need to produce  
several copies of the same data.  
Makes efficient use of network bandwidth and scales well as the number of multicast group  
members increases.  
Works with other IP protocols and services, such as Quality of Service (QoS).  
Multicast transmission makes more sense and is more efficient than unicast transmission for some  
applications. For example, multicasts are often used for video-conferencing, since high volumes of  
traffic must be sent to several end-stations at the same time, but where broadcasting the traffic to  
all end-stations would cause a substantial reduction in network performance. Furthermore, several  
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industrial automation protocols, such as Allen-Bradley, EtherNet/IP, Siemens Profibus, and  
Foundation Fieldbus HSE (High Speed Ethernet), use multicast. These industrial Ethernet  
protocols use publisher/subscriber communications models by multicasting packets that could  
flood a network with heavy traffic. IGMP Snooping is used to prune multicast traffic so that it  
travels only to those end destinations that require the traffic, reducing the amount of traffic on the  
Ethernet LAN.  
Multicast Filtering  
Multicast filtering ensures that only end-stations that have joined certain groups receive multicast  
traffic. With multicast filtering, network devices only forward multicast traffic to the ports that are  
connected to registered end-stations. The following two figures illustrate how a network behaves  
without multicast filtering, and with multicast filtering.  
Network without multicast filtering  
Group 1 Multicast Stream  
Group 2 Multicast Stream  
Serial ports  
Console  
LAN  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
IGMP Group2 IGMP Group1 IGMP Group2 IGMP Group1  
All hosts receive the multicast traffic, even if they don’t need it.  
Network with multicast filtering  
Group 1 Multicast Stream  
Group 2 Multicast Stream  
PWR1  
PWR2 FAULT  
SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
STAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
MASTER COUPLER CF  
PORT  
PORT  
MODE  
EtherDevice Switch  
EDS-726  
3
4
2
3
1
4
2
3
4
3
4
4
3
1
4
2
3
TX  
RX  
TX  
RX  
X  
X  
X  
X  
TX  
RX  
1
1
2
1
2
1
2
TX  
RX  
TX  
RX  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
IGMP Group2 IGMP Group1 IGMP Group2 IGMP Group1  
Hosts only receive dedicated traffic from other hosts belonging to the same group.  
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Multicast Filtering and MOXA EtherDevice Switch  
EDS-726 has three ways to achieve multicast filtering: IGMP (Internet Group Management  
Protocol) Snooping, GMRP (GARP Multicast Registration Protocol), and adding a static multicast  
MAC manually to filter multicast traffic automatically.  
IGMP (Internet Group Management Protocol)  
Snooping Mode  
Snooping Mode allows your switch to forward multicast packets only to the appropriate ports. The  
switch “snoops” on exchanges between hosts and an IGMP device, such as a router, to find those  
ports that want to join a multicast group, and then configures its filters accordingly.  
Query Mode  
Query mode allows the EDS-726 to work as the Querier if it has the lowest IP address on the  
subnetwork to which it belongs. IGMP querying is enabled by default on the EDS-726 to help  
prevent interoperability issues with some multicast routers that may not follow the lowest IP  
address election method. Enable query mode to run multicast sessions on a network that does not  
contain IGMP routers (or queriers).  
EDS-726 is compatible with any device that conforms to the IGMP v2 and IGMP v3 device  
protocol.  
NOTE  
IGMP Multicast Filtering  
IGMP is used by IP-supporting network devices to register hosts with multicast groups. It can be  
used on all LANs and VLANs that contain a multicast capable IP router, and on other network  
devices that support multicast filtering. IGMP works as follows:  
1. The IP router (or querier) periodically sends query packets to all end-stations on the LANs or  
VLANs that are connected to it. For networks with more than one IP router, the router with  
the lowest IP address is the querier. A switch with IP address lower than the IP address of any  
other IGMP queriers connected to the LAN or VLAN can become the IGMP querier.  
2. When an IP host receives a query packet, it sends a report packet back that identifies the  
multicast group that the end-station would like to join.  
3. When the report packet arrives at a port on a switch with IGMP Snooping enabled, the switch  
knows that the port should forward traffic for the multicast group, and then proceeds to  
forward the packet to the router.  
4. When the router receives the report packet, it registers that the LAN or VLAN requires traffic  
for the multicast groups.  
5. When the router forwards traffic for the multicast group to the LAN or VLAN, the switches  
only forward the traffic to ports that received a report packet.  
GMRP (GARP Multicast Registration Protocol)  
EDS-726 supports IEEE 802.1D-1998 GMRP (GARP Multicast Registration Protocol), which  
differs from IGMP (Internet Group Management Protocol). GMRP is a MAC-based multicast  
management protocol, whereas IGMP is IP-based. GMRP provides a mechanism that allows  
bridges and end stations to register or de-register Group membership information dynamically.  
GMRP functions similarly to GVRP, except that GMRP registers multicast addresses on ports.  
When a port receives a GMRP-join message, it will register the multicast address to its database if  
the multicast address is not registered, and all the multicast packets with that multicast address are  
able to be forwarded from this port. When a port receives a GMRP-leave message, it will  
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de-register the multicast address from its database, and all the multicast packets with this multicast  
address are not able to be forwarded from this port.  
Static Multicast MAC  
Some devices may only support multicast packets, but not support either IGMP Snooping or  
GMRP. MOXA EDS-726 supports adding multicast groups manually to enable multicast filtering.  
Enabling Multicast Filtering  
Use the serial console or Web interface to enable or disable IGMP Snooping and IGMP querying.  
If IGMP Snooping is not enabled, then IP multicast traffic is always forwarded, flooding the  
network.  
Configuring IGMP Snooping  
IGMP Snooping provides the ability to prune multicast traffic so that it travels only to those end  
destinations that require that traffic, thereby reducing the amount of traffic on the Ethernet LAN.  
IGMP Snooping Settings  
Querier Interval  
Setting  
Numerical value Set the query interval of the Querier function globally.  
input by user Valid settings are from 20 to 600 seconds.  
Description  
Factory Default  
125 seconds  
IGMP Snooping Enable  
Setting  
Description  
Factory Default  
Enable/Disable  
Click the checkbox to enable the IGMP Snooping  
Disabled  
function globally.  
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IGMP Snooping  
Setting  
Description  
Factory Default  
Enable/Disable  
Click the checkbox to enable the IGMP Snooping  
function per VLAN.  
Enabled if IGMP  
Snooping Enabled  
Globally  
Static Multicast Router Port  
Setting  
Description  
Factory Default  
Select/Deselect  
Click the checkbox to select which ports will connect to Disabled  
the multicast routers. It’s active only when IGMP  
Snooping is enabled.  
Querier  
Setting  
Description  
Factory Default  
Enable/Disable  
Click the checkbox to enable EDS-726’s querier  
function.  
Enabled if IGMP  
Snooping is  
Enabled Globally  
At least one switch must be designated the querier or enable IGMP snooping and GMRP when  
enabling Turbo Ring and IGMP snooping simultaneously.  
NOTE  
IGMP Table  
EDS-726 displays the current active IGMP groups that were detected.  
The information includes VID, Auto-learned Multicast Router Port, Static Multicast Router  
Port, Querier Connected Port, and the IP and MAC addresses of active IGMP groups.  
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Add Static Multicast MAC  
If required, MOXA EDS-726 also supports adding multicast groups manually.  
Add New Static Multicast Address to the List  
Setting  
Description  
Factory Default  
MAC Address  
Input the multicast MAC address of this host.  
None  
VLA  
Setting  
integer  
Description  
Factory Default  
Input the number of the VLAN that the host with this  
MAC Address belongs to.  
None  
Join Port  
Setting  
Description  
Factory Default  
Select/Deselect  
Checkmark the appropriate check boxes to select the  
join ports for this multicast group.  
None  
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Configuring GMRP  
GMRP is a MAC-based multicast management protocol, whereas IGMP is IP-based. GMRP  
provides a mechanism that allows bridges and end stations to register or un-register Group  
membership information dynamically.  
Port  
Setting  
Description  
Factory Default  
x-y  
Displays the module (x) and port No. by module (y) of  
None  
all ports that can enable the GMRP function  
GMRP enable  
Setting  
Description  
Factory Default  
Enable/Disable  
Click the check box to enable the GMRP function for  
the port listed in the Port column  
Disable  
Port Mode  
Setting  
Description  
Factory Default  
Forward All  
Select to forward all multicast frames unless an explicit Forward Unknown  
Static Filtering Entry specifies filtering (Add Static  
Multicast MAC).  
Forward  
Unknown  
(Unregister)  
Select to forward the multicast frames unless (1) an  
explicit Static Filtering Entry specifies filtering (Add  
Static Multicast MAC), or (2) an applicable Group  
Registration Entry specifies filtering.  
Forward Unknown  
Filter Unknown  
(Unregister)  
Select to filter the multicast frames unless (1) an explicit Forward Unknown  
Static Filtering Entry specifies filtering (Add Static  
Multicast MAC), or (2) an applicable Group  
Registration Entry specifies filtering.  
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GMRP Table  
EDS-726 displays the current active GMRP groups that were detected  
Setting  
Fixed Ports  
Description  
This multicast address is defined by static multicast.  
This multicast address is learned by GMRP.  
Learned Ports  
Using Bandwidth Management  
In general, one host should not be allowed to occupy unlimited bandwidth, particularly when the  
device malfunctions. For example, so-called “broadcast storms” could be caused by an incorrectly  
configured topology, or a malfunctioning device. The EDS-726 series not only prevents broadcast  
storms, but can also be configured to a different ingress rate for all packets, giving administrators  
full control of their limited bandwidth to prevent undesirable effects caused by unpredictable  
faults.  
Configuring Bandwidth Management  
Broadcast Storm Protection  
Setting  
Description  
Factory Default  
Enable/Disable  
Enable or disable the Broadcast Storm Protection for  
broadcast and unknown unicast packets globally.  
N/A  
Check the check box to include multicast packets when  
enabled for Broadcast Storm Protection.  
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Traffic Rate Limiting Settings  
Setting  
Description  
Factory Default  
Ingress rate  
Select the ingress rate for all packets from the following N/A  
options: not limited, 3%, 5%, 10%, 15%, 25%, 35%,  
50%, 65%, 85%  
Using Port Access Control  
EDS-726 provides two kinds of Port-Base Access Control. One is IEE 802.1X and the other is  
Static Port Lock.  
IEEE 802.1X  
The IEEE 802.1X standard defines a protocol for client/server-based access control and  
authentication. The protocol restricts unauthorized clients from connecting to a LAN through ports  
that are open to the Internet, and which otherwise would be readily accessible. The purpose of the  
authentication server is to check each client that requests access to the port. The client is only  
allowed access to the port if the client’s permission is authenticated.  
Static Port Lock  
EDS-726 can also be configured to protect static MAC addresses for a specific port. With the Port  
Lock function, these locked ports will not learn any additional addresses, but only allow traffic  
from preset static MAC addresses, helping to block hackers and careless usage.  
The IEEE802.1X Concept  
Three components are used to create an authentication mechanism based on 802.1X standards:  
Client/Supplicant, Authentication Server, and Authenticator.  
Supplicant: The end station that requests access to the LAN and switch services and responds to  
the requests from the switch.  
Authentication server: The server that performs the actual authentication of the supplicant.  
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Authenticator: Edge switch or wireless access point that acts as a proxy between the supplicant  
and the authentication server, requesting identity information from the supplicant, verifying the  
information with the authentication server, and relaying a response to the supplicant.  
EDS-726 acts as an authenticator in the 802.1X environment. A supplicant and an authenticator  
exchange EAPOL (Extensible Authentication Protocol over LAN) frames with each other. We can  
either use an external RADIUS server as the authentication server, or implement the authentication  
server in EDS-726 by using a Local User Database as the authentication look-up table. When we  
use an external RADIUS server as the authentication server, the authenticator and the  
authentication server exchange EAP frames between each other.  
Authentication can be initiated either by the supplicant or the authenticator. When the supplicant  
initiates the authentication process, it sends an “EAPOL-Start” frame to the authenticator. When  
the authenticator initiates the authentication process or when it receives an “EAPOL Start” frame,  
it sends an “EAP Request/Identity” frame to ask for the username of the supplicant. The following  
actions are described below:  
Message Exchange  
Authentication  
server  
Client  
(RADIUS)  
PWR1  
P
W
R
2
F
A
U
L
T
SPEED FDX/HDX  
RING COUPLER  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
TAT  
LNK/ACT  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
MASTER COUPLER CF  
PORT  
PORT  
MODE  
Erevice Switch  
EDS-726  
3
4
2
3
1
4
2
3
4
3
4
4
3
4
2
3
X  
X  
X  
X  
X  
X  
X  
X  
TX  
RX  
1
1
1
2
1
2
1
2
X  
X  
X  
X  
IM-1GTX  
IM-1GSXSC  
IM-4TX  
IM-4MST  
IM-4MSC  
IM-2MST/2TX  
IM-2MSC/2TX  
IM-1LSC/3TX  
EAPOL-Start  
EAP-Request/Identity  
EAP-Response/Identity  
EAP-Request/OTP  
EAP-Response/OTP  
EAP-Success  
RADIUS Access-Request  
RADIUS Access-Challenge  
RADIUS Access-Request  
RADIUS Access-Accept  
Port Authorized  
EAPOL-Logoff  
Port Unauthorized  
1. When the supplicant receives an “EAP Request/Identity” frame, it sends an “EAP  
Response/Identity” frame with its username back to the authenticator.  
2. If the RADIUS server is used as the authentication server, the authenticator relays the “EAP  
Response/Identity” frame from the supplicant by encapsulating it into a “RADIUS  
Access-Request” frame and sends to the RADIUS server. When the authentication server  
receives the frame, it looks up its database to check if the username exists. If the username is  
not present, the authentication server replies with a “RADIUS Access-Reject” frame to the  
authenticator if the server is a RADIUS server or just indicates failure to the authenticator if  
the Local User Database is used. The authenticator sends an “EAP-Failure” frame to the  
supplicant.  
3. The RADIUS server sends a “RADIUS Access-Challenge,” which contains an “EAP Request”  
with an authentication type to the authenticator to ask for the password from the client. RFC  
2284 defines several EAP authentication types, such as “MD5-Challenge,” “One-Time  
Password,” and “Generic Token Card.” Currently, only “MD5-Challenge” is supported. If the  
Local User Database is used, this step is skipped.  
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4. The authenticator sends an “EAP Request/MD5-Challenge” frame to the supplicant. If the  
RADIUS server is used, the “EAP Request/MD5-Challenge” frame is retrieved directly from  
the “RADIUS Access-Challenge” frame.  
5. The supplicant responds to the “EAP Request/MD5-Challenge” by sending an “EAP  
Response/MD5-Challenge” frame that encapsulates the user’s password using the MD5 hash  
algorithm.  
6. If the RADIUS server is used as the authentication server, the authenticator relays the “EAP  
Response/MD5-Challenge” frame from the supplicant by encapsulating it into a “RADIUS  
Access-Request” frame along with a “Shared Secret,” which must be the same within the  
authenticator and the RADIUS server, and sends the frame to the RADIUS server. The  
RADIUS server checks against the password with its database, and replies with “RADIUS  
Access-Accept” or “RADIUS Access-Reject” to the authenticator. If the Local User Database  
is used, the password is checked against its database and indicates success or failure to the  
authenticator.  
7. The authenticator sends “EAP Success” or “EAP Failure” by the received indication from the  
authentication server.  
Configuring IEEE 802.1X  
802.1X  
Setting  
Enable/Disable  
Description  
Factory Default  
Click the checkbox(es) under the 802.1X column to  
enable IEEE 802.1X for one or more ports. All end  
stations must enter usernames and passwords before  
access to these ports is allowed.  
Disable  
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Database Option  
Setting  
Description  
Factory Default  
Local  
(Max. 32 users)  
Select this option when setting the Local User Database Local  
as the authentication database.  
Radius  
Select this option to set an external RADIUS server as  
the authentication database. The authentication  
mechanism is “EAP-MD5.”  
Local  
Radius, Local  
Select this option to make using an external RADIUS  
server as the authentication database the first priority.  
The authentication mechanism is “EAP-MD5.” The first  
priority is to set the Local User Database as the  
authentication database.  
Local  
Radius Server  
Setting  
Description  
Factory Default  
IP address or  
domain name  
The IP address or domain name of the RADIUS server localhost  
Server Port  
Setting  
Description  
Factory Default  
Numerical  
The UDP port of the RADIUS Server  
1812  
Shared Key  
Setting  
Description  
Factory Default  
alphanumeric  
(Max. 40  
characters)  
A key to be shared between the external RADIUS server None  
and EDS-726. Both ends must be configured to use the  
same key.  
Re-Auth Period  
Setting  
Description  
Factory Default  
Enable/Disable  
Select to require re-authentication of the client after a  
preset time period of no activity has elapsed.  
Disable  
Re-Auth  
Setting  
Description  
Factory Default  
Numerical  
(60-65535 sec.)  
Specify how frequently the end stations need to reenter 3600 seconds  
usernames and passwords in order to stay connected.  
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802.1X Re-Authentication  
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EDS-726 can force connected devices to be re-authorized manually.  
802.1X Re-Authentication  
Setting  
Description  
Factory Default  
Enable/Disable  
Click the check box to enable 802.1X Re-Authentication Disable  
Local User Database Setup  
When setting the Local User Database as the authentication database, set the database first.  
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Local User Database Setup  
Setting  
Description  
Factory Default  
User Name  
User Name for Local User Database  
None  
(Max. 30 characters)  
Password  
(Max. 16 characters)  
Password for Local User Database  
Description for Local User Database  
None  
None  
Description  
(Max. 30 characters)  
The user name for the Local User Database is case-insensitive.  
NOTE  
802.1X Table  
The port status will show authorized or unauthorized.  
Static Port Lock  
MOXA EDS-726 also supports adding multicast groups manually if required.  
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Setting  
Description  
Factory Default  
MAC Address  
Add the static unicast MAC address into the address  
table.  
None  
Port  
Fix the static address with a dedicated port.  
1-1  
Using Auto Warning  
Since industrial Ethernet devices are often located at the endpoints of a system, these devices will  
not always know what is happening elsewhere on the network. This means that an industrial  
Ethernet switch that connects to these devices must provide system maintainers with real-time  
alarm messages. Even when control engineers are out of the control room for an extended period  
of time, they can still be informed of the status of devices almost instantaneously when exceptions  
occur. MOXA EDS-726 supports different approaches to warn engineers automatically, such as  
email and relay output. It also supports two digital inputs to integrate sensors into your system to  
automate alarms by email and relay output.  
Configuring Email Warning  
The Auto Email Warning function uses e-mail to alert the user when certain user-configured  
events take place.  
Three basic steps are required to set up the Auto Warning function:  
1. Configuring Email Event Types  
Select the desired Event types from the Console or Web Browser Event type page (a  
description of each event type is given later in the Email Alarm Events setting subsection).  
2. Configuring Email Settings  
To configure EDS-726’s email setup from the Console interface or browser interface, enter  
your Mail Server IP/Name (IP address or name), Account Name, Account Password, Retype  
New Password, and the email address(es) to which warning messages will be sent.  
3. Activate your settings and if necessary, test the email  
After configuring and activating your EDS-726’s Event Types and Email Setup, you can use  
the Test Email function to see if your e-mail addresses and mail server address have been  
properly configured.  
Email Alarm Events Settings  
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Event Types  
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Event Types can be divided into two basic groups: System Events and Port Events. System  
Events are related to the overall function of the switch, whereas Port Events are related to the  
activity of a specific port.  
System Event  
Switch Cold Start  
Warning e-mail is sent when…  
Power is cut off and then reconnected.  
Switch Warm Start  
EDS-726 is rebooted, such as when network  
parameters are changed (IP address, subnet mask,  
etc.).  
Power Transition (OnÆOff)  
Power Transition (OffÆOn)  
DI1 (OnÆOff)  
EDS-726 is powered down.  
EDS-726 is powered up.  
Digital Input 1 is triggered by on to off transition  
Digital Input 1 is triggered by off to on transition  
Digital Input 2 is triggered by on to off transition  
Digital Input 2 is triggered by off to on transition  
DI1 (OffÆOn)  
DI2 (OnÆOff)  
DI2 (OffÆOn)  
Configuration Change Activated Any configuration item has been changed.  
Comm. Redundancy Topology  
Changed  
If any Spanning Tree Protocol switches have changed  
their position (applies only to the root of the tree).  
If the Master of the Turbo Ring has changed or the  
backup path is activated.  
Authentication Failure  
An incorrect password is entered.  
Port Event  
Warning e-mail is sent when…  
Link-on  
The port is connected to another device.  
The port is disconnected (e.g., the cable is pulled out,  
or the opposing device shuts down).  
Link-off  
The port’s traffic surpasses the Traffic-Threshold for  
that port (provided this item is Enabled).  
Traffic-Overload  
Traffic-Threshold (%)  
Enter a nonzero number if the port’s Traffic-Overload  
item is Enabled.  
A Traffic-Overload warning is sent every  
Traffic-Duration seconds if the average  
Traffic-Threshold is surpassed during that time  
period.  
Traffic-Duration (sec.)  
The Traffic-Overload, Traffic-Threshold (%), and Traffic-Duration (sec.) Port Event items  
are related. If you Enable the Traffic-Overload event, then be sure to enter a nonzero  
Traffic-Threshold percentage, as well as a Traffic-Duration between 1 and 300 seconds.  
NOTE  
NOTE  
Warning e-mail messages will have sender given in the form:  
Moxa_EtherDevice_Switch_0001@Switch_Location  
where Moxa_EtherDevice_Switch is the default Switch Name, 0001 is EDS-726’s serial number,  
and Switch_Location is the default Server Location.  
Refer to the Basic Settings section to see how to modify Switch Name and Switch Location.  
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Email Settings  
Mail Server IP/Name  
Setting  
Description  
Factory Default  
IP address  
The IP Address of your email server.  
None  
Account Name  
Setting  
Description  
Factory Default  
Max. 45 Charters Your email account.  
None  
Password Setting  
Setting  
Description  
Factory Default  
Disable/Enable to To reset the Password from the Web Browser interface, Disable  
change Password click the Change password check-box, type the Old  
Password, type the New Password, retype the New  
password, and then click on Activate; Max. 45  
Characters.  
Old Password  
New Password  
Type the current password when changing the password None  
Type new password when enabled to change password; None  
Max. 45 Characters.  
Retype Password If you type a new password in the Password field, you  
will be required to retype the password in the Retype  
None  
new password field before updating the new password.  
Email Address  
Setting  
Max. 30  
characters  
Description  
Factory Default  
You can set up to 4 email addresses to receive alarm  
emails from EDS-726.  
None  
Send Test Email  
After finishing with the email settings, you should first press the “Activate” button to activate  
those settings, and then press the “Send Test Email” button to verify that the settings are correct.  
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Auto warning e-mail messages will be sent through an authentication protected SMTP server that  
supports the CRAM-MD5, LOGIN, and PAIN methods of SASL (Simple Authentication and  
Security Layer) authentication mechanism.  
NOTE  
We strongly recommend not entering your Account Name and Account Password if auto warning  
e-mail messages can be delivered without using an authentication mechanism.  
Configuring Relay Warning  
The Auto Relay Warning function uses relay output to alert the user when certain user-configured  
events take place. There are two basic steps required to set up the Relay Warning function:  
1. Configuring Relay Event Types  
Select the desired Event types from the Console or Web Browser Event type page (a  
description of each event type is given later in the Relay Alarm Events setting subsection).  
2. Activate your settings  
After completing the configuration procedure, you will need to activate your EDS-726’s  
Relay Event Types.  
Relay Alarm Events Settings  
Event Types  
Event Types can be divided into two basic groups: System Events and Port Events. System  
Events are related to the overall function of the switch, whereas Port Events are related to the  
activity of a specific port.  
MOXA EDS-726 supports two relay outputs. You can configure which relay output is related to  
which events. This helps administrators identify the importance of the different events.  
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Warning Relay output is triggered when…  
System Event  
Power Transition (OnÆOff)  
Power Transition (OffÆOn)  
DI1 (OnÆOff)  
EDS-726 is powered on.  
EDS-726 is powered down.  
Digital Input 1 is triggered by on to off transition  
Digital Input 1 is triggered by off to on transition  
Digital Input 2 is triggered by on to off transition  
Digital Input 2 is triggered by off to on transition  
DI1 (OffÆOn)  
DI2 (OnÆOff)  
DI2 (OffÆOn)  
Port Event  
Warning e-mail is sent when…  
Link-on  
The port is connected to another device.  
The port is disconnected (e.g., the cable is pulled out,  
or the opposing device shuts down).  
Link-off  
The port’s traffic surpasses the Traffic-Threshold for  
that port (provided this item is Enabled).  
Traffic-Overload  
Traffic-Threshold (%)  
Enter a nonzero number if the port’s Traffic-Overload  
item is Enabled.  
A Traffic-Overload warning is sent every  
Traffic-Duration seconds if the average  
Traffic-Threshold is surpassed during that time  
period.  
Traffic-Duration (sec.)  
The Traffic-Overload, Traffic-Threshold (%), and Traffic-Duration (sec) Port Event items  
are related. If you Enable the Traffic-Overload event, then be sure to enter a nonzero  
Traffic-Threshold percentage, as well as a Traffic-Duration between 1 and 300 seconds.  
NOTE  
Override relay alarm settings  
Click the checkbox to override the relay warning setting temporarily. Releasing the relay output  
will allow administrators to fix any problems with the warning condition.  
Relay Alarm List  
Use this table to see if any relay alarms have been issued.  
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Using Line-Swap-Fast-Recovery  
The Line-Swap Fast Recovery function, which is enabled by default, allows EDS-726 to return to  
normal operation extremely quickly after devices are unplugged and then re-plugged into different  
ports. The recovery time is on the order of a few milliseconds (compare this with standard  
commercial switches for which the recovery time could be on the order of several minutes). To  
disable the Line-Swap Fast Recovery function, or to re-enable the function after it has already  
been disabled, access either the Console utility’s Line-Swap recovery page, or the Web Browser  
interface’s Line-Swap fast recovery page, as shown below.  
Configuring Line-Swap Fast Recovery  
Enable Line-Swap-Fast-Recovery  
Setting  
Description  
Factory Default  
Enable/Disable  
Check-mark the check box to enable the  
Line-Swap-Fast-Recovery function  
Enable  
Using Set Device IP  
To reduce the effort required to set up IP addresses, the EDS-726 series comes equipped with  
DHCP/BootP server and RARP protocol to set up IP addresses of Ethernet-enabled devices  
automatically.  
When enabled, the Set device IP function allows EDS-726 to assign specific IP addresses  
automatically to connected devices that are equipped with DHCP Client or RARP protocol. In  
effect, EDS-726 acts as a DHCP server by assigning a connected device with a specific IP address  
stored in its internal memory. Each time the connected device is switched on or rebooted,  
EDS-726 sends the device the desired IP address.  
Take the following steps to use the Set device IP function:  
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STEP 1—set up the connected devices  
Featured Functions  
Set up those Ethernet-enabled devices connected to  
EDS-726 for which you would like IP addresses to be  
assigned automatically. The devices must be  
configured to obtain their IP address automatically.  
The devices’ configuration utility should include a  
setup page that allows you to choose an option  
similar to Obtain an IP address automatically.  
For example, Windows’ TCP/IP Properties window  
is shown at the right. Although your device’s  
configuration utility may look quite a bit different,  
this figure should give you some idea of what to look  
for.  
You also need to decide which of EDS-726’s ports  
your Ethernet-enabled devices will be connected to.  
You will need to set up each of these ports separately,  
as described in the following step.  
STEP 2  
Configure EDS-726’s Set device IP function, either from the Console utility or from the Web  
Browser interface. In either case, you simply need to enter the Desired IP for each port that needs  
to be configured.  
STEP 3  
Be sure to activate your settings before exiting.  
When using the Web Browser interface, activate by clicking on the Activate button.  
When using the Console utility, activate by first highlighting the Activate menu option, and  
then press Enter. You should receive the Set device IP settings are now active! (Press any  
key to continue) message.  
Configuring Set Device IP  
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Desired IP Address  
Setting  
Description  
Set the desired IP of connected devices.  
Factory Default  
IP Address  
None  
Using Diagnosis  
MOXA EDS-726 provides two important tools for administrators to diagnose network systems.  
Mirror Port  
The Mirror port function can be used to monitor data being transmitted through a specific port.  
This is done by setting up another port (the mirror port) to receive the same data being transmitted  
from, or both to and from, the port under observation. This allows the network administrator to  
“sniff” the observed port and thus keep tabs on network activity.  
Take the following steps to set up the Mirror Port function:  
STEP 1  
Configure EDS-726’s Mirror Port function from either the Console utility or Web Browser  
interface. You will need to configure three settings:  
Monitored Port Select the port number of the port whose network activity will be  
monitored.  
Mirror Port  
Select the port number of the port that will be used to monitor the  
activity of the monitored port.  
Watch Direction Select one of the following two watch direction options:  
y
y
Output data stream  
Select this option to monitor only those data packets being sent out  
through EDS-726’s port.  
Bi-directional  
Select this option to monitor data packets both coming into, and  
being sent out through, EDS-726’s port.  
STEP 2  
Be sure to activate your settings before exiting.  
When using the Web Browser interface, activate by clicking on the Activate button.  
When using the Console utility, activate by first highlighting the Activate menu option, and  
then press Enter. You should receive the Mirror port settings are now active! (Press any  
key to continue) message.  
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Featured Functions  
Ping  
The Ping function uses the ping command to give users a simple but powerful tool for  
troubleshooting network problems. The function’s most unique feature is that even though the  
ping command is entered from the user’s PC keyboard, the actual ping command originates from  
EDS-726 itself. In this way, the user can essentially “sit on top of EDS-726” and send ping  
commands out through its ports.  
To use the Ping function, type in the desired IP address, and then press Enter from the Console  
utility, or click on Ping when using the Web Browser interface.  
Using Monitor  
You can monitor statistics in real time from EDS-726’s web console and serial console.  
Monitor by Switch  
Access the Monitor by selecting “System” from the left selection bar. Monitor by System allows  
the user to view a graph that shows the combined data transmission activity of all of EDS-726’s 8  
ports. Click on one of the four options—All Packets, TX Packets, RX Packets, or Error  
Packets—to view transmission activity of specific types of packets. Recall that TX Packets are  
packets sent out from EDS-726, RX Packets are packets received from connected devices, and  
Error Packets are packets that did not pass TCP/IP’s error checking algorithm. The All Packets  
option displays a graph that combines TX, RX, and Error Packet activity. The four graphs (All  
Packets, TX Packets, RX Packets, and Error Packets) have the same form, so we only show the All  
Packets graph. The graph displays data transmission activity by showing Packets/s (i.e., packets  
per second, or pps) versus sec. (seconds). In fact, three curves are displayed on the same graph:  
Uni-cast packets (in red color), Multi-cast packets (in green color), and Broad-cast packets (in  
blue color). The graph is updated every few seconds, allowing the user to analyze data  
transmission activity in real-time.  
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Monitor by Port  
Access the Monitor by Port function by selecting ALL Ports or Porti, in which i= 1, 2, …, 8,  
from the left pull-down list. The Porti options are identical to the Monitor by System function  
discussed above, in that users can view graphs that show All Packets, TX Packets, RX Packets, or  
Error Packets activity, but in this case, only for an individual port. The All Ports option is  
essentially a graphical display of the individual port activity that can be viewed with the Console  
Monitor function discussed above. The All Ports option shows three vertical bars for each port.  
The height of the bar represents Packets/s for the type of packet, at the instant the bar is being  
viewed. That is, as time progresses, the height of the bar moves up or down so that the user can  
view the change in the rate of packet transmission. The red colored bar shows Uni-cast packets,  
the green colored bar shows Multi-cast packets, and the blue colored bar shows Broad-cast  
packets. The graph is updated every few seconds, allowing the user to analyze data transmission  
activity in real-time.  
Using the MAC Address Table  
This section explains the information provided by EDS-726’s MAC address table.  
The MAC Address table can be configured to display the following EDS-726 MAC address  
groups.  
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ALL  
Select this item to show all EDS-726 MAC addresses  
Select this item to show all EDS-726 Learned MAC addresses  
ALL Learned  
ALL Static Lock  
ALL Static  
Select this item to show all EDS-726 Static Lock MAC addresses  
Select this item to show all EDS-726 Static/Static Lock /Static  
Multicast MAC addresses  
ALL Static  
Multicast  
Select this item to show all EDS-726 Static Multicast MAC  
addresses  
Port x  
Select this item to show all MAC addresses of dedicated ports  
The table will display the following information:  
MAC  
Type  
This field shows the MAC address  
This field shows the type of this MAC address  
This field shows the port that this MAC address belongs to  
This field shows the priority of this MAC address  
Port  
Priority  
Using Event Log  
Bootup  
Date  
This field shows how many times the EDS-726 has been rebooted or cold started.  
The date is updated based on how the current date is set in the “Basic Setting” page.  
The time is updated based on how the current time is set in the “Basic Setting” page.  
The system startup time related to this event.  
Time  
System  
Startup  
Time  
Events  
Events that have occurred.  
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4
Chapter  
4
EDS Configurator GUI  
EDS Configurator is a comprehensive Windows-based GUI that is used to configure and maintain  
multiple EDS-726 switches. A suite of useful utilities is available to help you locate EDS-726  
switches attached to the same LAN as the PC host (regardless of whether or not you know the IP  
addresses of the switches), connect to an EDS-726 whose IP address is known, modify the  
network configurations of one or multiple EDS-726 switches, and update the firmware of one or  
more EDS-726 switches. EDS Configurator is designed to provide you with instantaneous control  
of all of your EDS-726 switches, regardless of location. You may download the EDS Configurator  
software from Moxa’s website free of charge.  
This chapter includes the following sections:  
Starting EDS Configurator  
Broadcast Search  
Search by IP address  
Upgrade Firmware  
Modify IP Address  
Export Configuration  
Import Configuration  
Unlock Server  
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EDS Configurator GUI  
Starting EDS Configurator  
To start EDS Configurator, locate and then run the executable file edscfgui.exe.  
You may download the EDS Configurator software from Moxa’s website at www.moxa.com.  
NOTE  
For example, if the file was placed on the Windows desktop, it should appear as follows. Simply  
double click on the icon to run the program.  
The MOXA EtherDevice Server Configurator window will open, as shown below.  
Broadcast Search  
Use the Broadcast Search utility to search the LAN for all EDS-726 switches that are connected to  
the LAN. Note that since the search is done by MAC address, Broadcast Search will not be able to  
locate MOXA EtherDevice Servers connected outside the PC host’s LAN. Start by clicking on the  
Broadcast Search icon  
, or by selecting Broadcast Search under the List Server menu.  
The Broadcast Search window will open, displaying a list of all switches located on the network,  
as well as the progress of the search.  
4-2  
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EDS Configurator GUI  
Once the search is complete, the Configurator window will display a list of all switches that were  
located.  
Search by IP address  
This utility is used to search for EDS-726 switches one at a time. Note that the search is conducted  
by IP address, so you should be able to locate any EDS-726 that is properly connected to your  
LAN, WAN, or even the Internet. Start by clicking on the Specify by IP address icon  
, or by  
selecting Specify IP address under the List Server menu.  
The Search Server with IP Address window will open. Enter the IP address of the switch you  
wish to search for, and then click OK.  
Once the search is complete, the Configurator window will add the switch to the list of switches.  
Upgrade Firmware  
Keep your EDS-726 up to date with the latest firmware from Moxa. Take the following steps to  
upgrade the firmware:  
1. Download the updated firmware (*.rom) file from the Moxa website (www.moxa.com).  
2. Click on the switch (from the MOXA EtherDevice Server Configurator window) whose  
firmware you wish to upgrade to highlight it.  
4-3  
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EDS-726 Series User’s Manual  
3. Click on the Upgrade Firmware toolbar icon  
EDS Configurator GUI  
, or select Upgrade under the Firmware  
menu. If the switch is Locked, you will be prompted to input the switch’s User Name and  
Password.  
4. Use the Open window to navigate to the folder that contains the firmware upgrade file, and  
then click on the correct “*.rom” file (eds.rom in the example shown below) to select the file.  
Click on Open to activate the upgrade process.  
Modify IP Address  
You may use the Modify IP Address function to reconfigure EDS-726’s network settings. Start by  
clicking on the Modify IP address icon  
, or by selecting Modify IP address under the  
Configuration menu.  
The Setup Configuration window will open. Checkmark the box to the left of those items that  
you wish to modify, and then Disable or Enable DHCP, and enter IP Address, Subnet mask,  
Gateway, and DNS IP. Click OK to accept the changes to the configuration.  
4-4  
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EDS Configurator GUI  
Export Configuration  
The Export Configuration utility is used to save the entire configuration of a particular EDS-726  
to a text file. Take the following steps to export a configuration:  
1. Highlight the switch (from the Server list in the Configurator window’s left pane), and then  
click on the Export toolbar icon  
or select Export Configuration from the  
Configuration menu. Use the Open window to navigate to the folder in which you want to  
store the configuration, and then type the name of the file in the File name input box. Click on  
Open.  
2. Click on OK when the Export configuration to file OK message appears.  
3. You may use a standard text editor, such as Notepad under Windows, to view and modify the  
newly created configuration file.  
4-5  
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EDS-726 Series User’s Manual  
EDS Configurator GUI  
Import Configuration  
The Import Configuration function is used to import an entire configuration from a text file to  
EDS-726. This utility can be used to transfer the configuration from one EDS-726 to another, by  
first using the Export Configuration function (described in the previous section) to save a switch  
configuration to a file, and then using the Import Configuration function. Take the following steps  
to import a configuration:  
1. Highlight the server (from the MOXA EtherDevice Switch list in the Configurator window’s  
left pane), and then click on the Import toolbar icon  
, or select Import Configuration  
from the Configuration menu.  
2. Use the Open window to navigate to the text file that contains the desired configuration. Once  
the file is selected, click on Open to initiate the import procedure.  
3. The Setup Configuration window will be displayed, with a special note attached at the  
bottom. Parameters that have been changed will be activated with a checkmark. You may  
make more changes if necessary, and then click on OK to accept the changes.  
4-6  
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EDS Configurator GUI  
4. Click on Yes in response to the following warning message to accept the new settings.  
Unlock Server  
The Unlock Server function is used to open a password protected switch so that the user can  
modify its configuration, import/export a configuration, etc. There are six possible responses under  
the Status column. The Status of an EDS-726 indicates how the switch was located (by MOXA  
EtherDevice Switch Configurator), and what type of password protection it has.  
The six options are as follows (note that the term Fixed is borrowed from the standard fixed IP  
address networking terminology):  
y
Locked  
The switch is password protected, “Broadcast Search” was used to locate it, and the password  
has not yet been entered from within the current Configurator session.  
y
Unlocked  
The switch is password protected, “Broadcast Search” was used to locate it, and the password  
has been entered from within the current Configurator session. Henceforth during this  
Configurator session, activating various utilities for this switch will not require re-entering the  
server password.  
y
y
y
Blank  
EDS-726 is not password protected, and “Broadcast Search” was used to locate it.  
Fixed  
EDS-726 is not password protected, and “Search by IP address” was used to locate it manually.  
Locked Fixed  
EDS-726 is password protected, “Search by IP address” was used to locate it manually, and the  
password has not yet been entered from within the current Configurator session.  
y
Unlocked Fixed  
EDS-726 is password protected, “Search by IP address” was used to locate it manually, and  
the password has been entered from within the current Configurator session. Henceforth  
during this Configurator session, activating various utilities for this EDS-726 will not require  
re-entering the server password.  
Follow the steps given below to unlock a locked EDS-726 (i.e., an EDS-726 with Status “Locked”  
or “Locked Fixed”). Highlight the server (from the MOXA EtherDevice Switch list in the  
Configurator window’s left pane), and then click on the Unlock toolbar icon  
, or select Unlock  
from the Configuration menu.  
1. Enter the switch’s User Name and Password when prompted, and then click OK.  
4-7  
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EDS Configurator GUI  
2. When the Unlock status window reports Progress as OK, click on the Close button in the  
upper right corner of the window.  
3. The status of the switch will now read either Unlocked or Unlocked Fixed.  
4-8  
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A
Appendix  
A
MIB Groups  
MOXA EDS-726 comes with built-in SNMP (Simple Network Management Protocol) agent  
software that supports cold/warm start trap, line up/down trap, and RFC 1213 MIB-II.  
The standard MIB groups that MOXA EDS-726 series support are:  
MIB II.1 – System Group  
sysORTable  
MIB II.2 – Interfaces Group  
ifTable  
MIB II.4 – IP Group  
ipAddrTable  
ipNetToMediaTable  
IpGroup  
IpBasicStatsGroup  
IpStatsGroup  
MIB II.5 – ICMP Group  
IcmpGroup  
IcmpInputStatus  
IcmpOutputStats  
MIB II.6 – TCP Group  
tcpConnTable  
TcpGroup  
TcpStats  
MIB II.7 – UDP Group  
udpTable  
UdpStats  
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EDS-726 Series User’s Manual  
MIB II.10 – Transmission Group  
MIB Groups  
dot3  
dot3StatsTable  
MIB II.11 – SNMP Group  
SnmpBasicGroup  
SnmpInputStats  
SnmpOutputStats  
MIB II.17 – dot1dBridge Group  
dot1dBase  
dot1dBasePortTable  
dot1dStp  
dot1dStpPortTable  
dot1dTp  
dot1dTpFdbTable  
dot1dTpPortTable  
dot1dTpHCPortTable  
dot1dTpPortOverflowTable  
pBridgeMIB  
dot1dExtBase  
dot1dPriority  
dot1dGarp  
qBridgeMIB  
dot1qBase  
dot1qTp  
dot1qFdbTable  
dot1qTpPortTable  
dot1qTpGroupTable  
dot1qForwardUnregisteredTable  
dot1qStatic  
dot1qStaticUnicastTable  
dot1qStaticMulticastTable  
dot1qVlan  
dot1qVlanCurrentTable  
dot1qVlanStaticTable  
dot1qPortVlanTable  
A-2  
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MIB Groups  
EDS-726 also provides a private MIB file, located in the file “MOXA-EDS726-MIB.my” on the  
EDS-726 Series utility CD-ROM.  
Public Traps:  
1. Cold Start  
2. Link Up  
3. Link Down  
4. Authentication Failure  
5. dot1dBridge New Root  
6. dot1dBridge Topology Changed  
Private Traps:  
1. Configuration Changed  
2. Power On  
3. Power Off  
4. Traffic Overloaded  
5. Turbo Ring Topology Changed  
6. Turbo Ring Coupling Port Changed  
7. Turbo Ring Master Mismatch  
8. CF Save  
9. CF Load  
10. Module Inserted  
11. Module Removed  
A-3  
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B
Appendix  
B
Specifications  
Modular Managed Switch System, EDS-72610G  
Modular Managed Switch System with 6 slots, and up to 26 ports.  
PWR1  
PWR2 FAULT  
SPEED FDX/HDX  
STAT  
LNK/ACT  
RING COUPLER  
MASTER COUPLER CF  
PORT  
PORT  
MODE  
EtherDevice Switch  
EDS-726  
Technology  
Standards  
IEEE802.3, 802.3u, 802.3x, 802.1D, 802.1w, 802.1Q,  
802.1p, 802.1X, 802.3ad, 802.3z  
Protocols  
MIB  
IGMP Snooping, GMRP, GVRP, SNMP V1/V2C/V3, DHCP  
Server/Client, BOOTP, TFTP, SNTP, SMTP, RARP, RMON  
and EDS-SNMP OPC Server Pro (Optional)  
MIB-II, Ethernet-Like MIB, P-BRIDGE MIB, Q-BRIDGE  
MIB, Bridge MIB, RSTP MIB, RMON MIB Groups 1, 2.3, 9  
(available soon)  
Flow Control  
IEEE802.3x flow control/back pressure  
Interface  
Fast Ethernet  
6 slots for any combination of 4-port Interface Modules with  
10/100BaseT(X) or 100BaseFX  
Gigabit Ethernet  
2 sockets for any combination of 1-port Interface Modules  
with 10/100/1000BaseT(X), 1000BaseSX, 1000BaseLX,  
1000BaseLHX, 1000BaseZX  
CompactFlash Interface  
Console  
Present  
RS-232 (RJ45)  
System LED Indicators  
Module LED Indicators  
STAT, PWR1, PWR2, FAULT, MASTER, COUPLER, CF  
LNK/ACT, FDX/HDX, RING PORT, COUPLER, PORT,  
SPEED  
Alarm Contact  
Two relay outputs with current carrying capacity of 1A @ 24  
VDC  
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EDS-726 Series User’s Manual  
Specifications  
Two inputs with the same ground, but electrically isolated  
Digital Inputs  
from the electronics.  
For state “1”: +13 to +30V  
For state “0”: -30 to +3V  
Max. input current: 8 mA  
Power  
Input Voltage  
Connection  
24 VDC (12 to 45 VDC), redundant dual inputs  
Two removable 6-pin terminal blocks  
Power Consumption  
EDS-72610G  
IM-4TX  
21.5W  
2.5W  
IM-2MSC/2TX 5W  
IM-2MST/2TX 5W  
IM-2SSC/2TX 5W  
IM-4MSC  
IM-4MST  
IM-4SSC  
7.2W  
7.2W  
7.2W  
IM-1LSC/3TX 4W  
IM-1GTX  
2.5W  
IM-1GSXSC  
IM-1GLXSC  
1.5W  
1.5W  
IM-1GLHXSC 1.5W  
IM-1GZXSC  
1.5W  
Overload Current Protection Present  
Reverse Polarity Protection Present  
Mechanical  
Casing  
IP30 protection  
Dimensions  
Installation  
362 x 146 x 128 mm (W x H x D)  
DIN-Rail, Wall Mounting (optional kit)  
Gigabit Ethernet Interface Module, IM series  
IM-1GTX:  
Interface Module with 1 10/100/1000BaseT(X) port, RJ45 connector.  
IM-1GSXSC:  
IM-1GLXSC:  
Interface Module with 1 1000BaseSX port, SC connector.  
Interface Module with 1 1000BaseLX port, SC connector.  
IM-1GLHXSC: Interface Module with 1 1000BaseLHX port, SC connector, 40 km.  
IM-1GZXSC:  
Interface Module with 1 1000BaseZX port, SC connector, 80 km.  
IM-1GTX  
IM-1GSXSC  
IM-1GTX  
IM-1GSXSC,  
IM-1GLXSC,  
IM-1GLHXSC,  
IM-1GZXSC  
B-2  
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Specifications  
Interface  
LED Indicators  
RJ45 Ports  
Port Status  
10/100/1000BaseT(X) auto negotiation speed, and auto  
MDI/MDI-X connection  
Distance  
100 m  
Fiber Ports  
1000BaseSX/LX/LHX/ZX (SC connector)  
Optical Fiber  
Distance  
Multi mode  
IM-1GSXSC  
0 to 500 m, 850 nm (50/125 μm, 400 MHz*km)  
0 to 275 m, 850 nm (62.5/125 μm, 200 MHz*km)  
IM-1GLXSC  
0 to 1100 m, 1310 nm (50/125 μm, 800 MHz*km)  
0 to 550 m, 1310 nm (62.5/125 μm, 500 MHz*km)  
Single mode  
IM-1GLXSC  
0 to 10 km, 1310 nm (9/125 μm, 3.5 PS/(nm*km))  
IM-1GLHXSC  
0 to 40 km, 1310 nm (9/125 μm, 19 PS/(nm*km)) TBD  
IM-1GZXSC  
0 to 80 km, 1550 nm (9/125 μm, 19 PS/(nm*km)) TBD  
Min. TX Output  
1M-GSX  
-9.5 dB  
-9.5 dB  
-4 dB  
1M-1GLX  
1M-1GLHX  
1M-1GZX  
0 dB  
Max. TX Output  
1M-GSX  
-4 dB  
-3 dB  
+3 dB  
+5 dB  
1M-1GLX  
1M-1GLHX  
1M-1GZX  
Sensitivity  
1M-GSX  
0 to -18 dB  
-3 to -20 dB  
-3 to -23 dB  
-3 to -23 dB  
1M-1GLX  
1M-1GLHX  
1M-1GZX  
Mechanical  
Dimensions  
24 x 66 x 101 mm (W x H x D)  
Fast Ethernet Interface Module, IM series  
IM-4TX:  
Interface Module with 4 10/100BaseT(X) ports, RJ45 connectors.  
IM-4MSC:  
IM-4MST:  
IM-4SSC:  
Interface Module with 4 multi mode 100BaseFX ports, SC connectors.  
Interface Module with 4 multi mode 100BaseFX ports, ST connectors.  
Interface Module with 4 single mode 100BaseFX ports, 40 km SC connectors.  
IM-2MSC/2TX: Interface Module with 2 multi mode 100BaseFX ports, SC connectors, and 2  
10/100BaseT(X) ports, RJ45 connectors.  
B-3  
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EDS-726 Series User’s Manual  
Specifications  
IM-2MST/2TX: Interface Module with 2 multi mode 100BaseFX ports, ST connectors, and 2  
10/100BaseT(X) ports, RJ45 connectors.  
IM-2SSC/2TX: Interface Module with 2 single mode 100BaseFX ports, 40 km SC connectors,  
and 2 10/100BaseT(X) ports, RJ45 connectors.  
IM-1LSC/3TX: Interface Module with 1 single mode 100BaseFX port, 80 km SC connector and  
3 10/100BaseT(X) ports, RJ45 connectors.  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
P3  
P1  
P4  
P2  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
3
1
4
2
3
4
2
3
4
3
4
4
3
1
4
2
3
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
TX  
RX  
1
1
2
1
2
1
2
TX  
RX  
TX  
RX  
IM-4TX  
IM-4MSC  
IM-4MST  
IM-2MSC/2TX  
IM-2MST/2TX  
IM-1LSC/3TX  
IM-4TX  
IM-4MSC,  
IM-4SSC,  
IM-4MST  
IM-2MSC/  
2TX  
IM-2MST/  
2TX  
IM-1LSC/  
3TX  
IM-2SSC/  
2TX  
Interface  
LED Indicators  
RJ45 Ports  
PWR, P1, P2, P3, P4 port status  
10/100/1000BaseT(X) auto negotiation speed, F/H duplex  
mode, and auto MDI/MDI-X connection  
Distance  
100 m  
Fiber Ports  
100BaseFX ports (SC/ST connector)  
Optical Fiber  
Distance  
Multi mode:  
IM-4MSC, IM-4MST, IM-2MSC/2TX, IM-2MST/2TX  
0 to 5 km, 1310 nm (50/125 μm, 800 MHz*km)  
0 to 4 km, 1310 nm (62.5/125 μm, 500 MHz*km)  
Single mode:  
IM-4SSC  
0 to 40 km, 1310 nm (9/125 μm, 3.5 PS/(nm*km))  
IM-1LSC/3TX  
0 to 80 km, 1550 nm (9/125 μm, 19 PS/(nm*km))  
Min. TX Output  
Multi mode:  
-20 dBm  
Single mode:  
0 to 40 km, -5 dBm  
0 to 80 km, -5 dBm  
Max. TX Output  
Multi mode:  
-14 dBm  
Single mode:  
0 to 40 km, 0 dBm  
0 to 80 km, 0 dBm  
Sensitivity  
Multi mode:  
Single mode:  
-34 to -30 dBm  
-36 to -32 dBm  
B-4  
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Specifications  
Mechanical  
Casing  
IP30 protection  
Dimensions  
40 x 130 x 100 mm (W x H x D)  
Environmental  
Operating Temperature  
Storage Temperature  
0 to 60°C (32 to 140°F)  
-40 to 85°C (-40 to 185°F)  
Ambient Relative Humidity 5 to 95% (non-condensing)  
Regulatory Approvals  
Safety  
UL60950, UL 508, CSA C22.2 No. 60950, EN60950  
(Pending)  
Hazardous Location  
UL/cUL Class I, Division 2, Groups A, B, C and D  
(Pending)  
ATEX Class I, Zone 2, EEx nC IIC (Pending)  
EMI  
FCC Part 15, CISPR (EN55022) class A  
EMS  
EN61000-4-2 (ESD), Level 3  
EN61000-4-3 (RS), Level 3  
EN61000-4-4 (EFT), Level 3  
EN61000-4-5 (Surge), Level 3  
EN61000-4-6 (CS), Level 3  
EN61000-4-8  
EN61000-4-11  
EN61000-4-12  
Shock  
IEC60068-2-27  
IEC60068-2-32  
IEC60068-2-6  
Free Fall  
Vibration  
WARRANTY  
5 years  
B-5  
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C
Appendix  
C
Service Information  
This appendix shows you how to contact Moxa for information about this and other products, and  
how to report problems.  
In this appendix, we cover the following topics.  
MOXA Internet Services  
Problem Report Form  
Product Return Procedure  
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EDS-726 Series User’s Manual  
Service Information  
MOXA Internet Services  
Customer satisfaction is our number one concern, and to ensure that customers receive the full  
benefit of our products, Moxa Internet Services has been set up to provide technical support, driver  
updates, product information, and user’s manual updates.  
The following services are provided  
E-mail for technical support................................support@moxanet.com (Worldwide)  
...............................support@moxa.com  
(The Americas)  
World Wide Web (WWW) Site for product information:  
...............................http://www.moxa.com  
C-2  
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EDS-726 Series User’s Manual  
Service Information  
Problem Report Form  
MOXA EDS-726 Series  
Customer name:  
Company:  
Tel:  
Fax:  
Email:  
Date:  
Serial Number: _________________  
Problem Description: Please describe the symptoms of the problem as clearly as possible, including any error  
messages you see. A clearly written description of the problem will allow us to reproduce the symptoms, and  
expedite the repair of your product.  
C-3  
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EDS-726 Series User’s Manual  
Service Information  
Product Return Procedure  
For product repair, exchange, or refund, the customer must:  



Provide evidence of original purchase.  
Obtain a Product Return Agreement (PRA) from the sales representative or dealer.  
Fill out the Problem Report Form (PRF). Include as much detail as possible for a shorter  
product repair time.  

Carefully pack the product in an anti-static package, and send it, pre-paid, to the dealer. The  
PRA should be visible on the outside of the package, and include a description of the problem,  
along with the return address and telephone number of a technical contact.  
C-4  
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