Moxa Technologies EtherDevice, EDS-726, EtherDevice EDS-828, EtherDevice EDS-728 User Manual

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Moxa EtherDevice™ Switch

EDS-728 Series User’s Manual

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First Edition, January 2008

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Moxa EtherDevice™ Switch

EDS-728 Series User’s Manual

The software described in this manual is furnished under a license agreement and may be used only in

accordance with the terms of that agreement.

Reproduction without permission is prohibited.

Trademarks

MOXA is a registered trademark of the Moxa Inc.

All other trademarks or registered marks in this manual belong to their respective manufacturers.

Disclaimer

Information in this document is subject to change without notice and does not represent a commitment on the part of Moxa.

Moxa provides this document “as is,” without warranty of any kind, either expressed or implied, including, but not limited to, its particular purpose. Moxa reserves the right to make improvements and/or changes to this manual, or to the products and/or the programs described in this manual, at any time.

Information provided in this manual is intended to be accurate and reliable. However, Moxa assumes no responsibility for its use, or for any infringements on the rights of third parties that may result from its use.

This product might include unintentional technical or typographical errors. Changes are periodically made to the information herein to correct such errors, and these changes are incorporated into new editions of the publication.

Table of Contents

Chapter 1 Introduction ...............................................................................................1-1

Overview .............................................................................................................................. 1-2

Package Checklist................................................................................................................. 1-2

Features ................................................................................................................................ 1-2

Industrial Networking Capability.............................................................................. 1-2

Designed for Industrial Applications......................................................................... 1-2

Useful Utility and Remote Configuration ................................................................. 1-3

Recommended Software and Accessories................................................................. 1-3

Chapter 2 Getting Started ..........................................................................................2-1

RS-232 Console Configuration (115200, None, 8, 1, VT100) ............................................. 2-2

Configuration by Telnet Console.......................................................................................... 2-5

Configuration by Web Browser ............................................................................................ 2-6

Disabling Telnet and Browser Access .................................................................................. 2-8

Chapter 3 Featured Functions...................................................................................3-1

Overview .............................................................................................................................. 3-2

Configuring Basic Settings................................................................................................... 3-2

System Identification................................................................................................. 3-2

Password ................................................................................................................... 3-3

Accessible IP............................................................................................................. 3-5

Port ............................................................................................................................ 3-6

Network..................................................................................................................... 3-7

Time .......................................................................................................................... 3-9

System File Update—By Remote TFTP ................................................................. 3-10

System File Update—By Local Import/Export....................................................... 3-12

System File Update—By Backup Media ................................................................ 3-12

Restart ..................................................................................................................... 3-13

Factory Default........................................................................................................ 3-13

Using Port Trunking ........................................................................................................... 3-14

The Port Trunking Concept..................................................................................... 3-14

Configuring Port Trunking...................................................................................... 3-15

Configuring SNMP............................................................................................................. 3-17

SNMP Read/Write Settings..................................................................................... 3-18

Trap Settings ........................................................................................................... 3-19

Private MIB information ......................................................................................... 3-19

Using Communication Redundancy................................................................................... 3-20

Gigabit Ethernet Redundant Ring Capability (< 50 ms) ......................................... 3-20

The Turbo Ring Concept......................................................................................... 3-21

Configuring “Turbo Ring” and “Turbo Ring V2”................................................... 3-25

The STP/RSTP Concept.......................................................................................... 3-29

Configuring STP/RSTP........................................................................................... 3-31

Using Traffic Prioritization................................................................................................. 3-33

The Traffic Prioritization Concept .......................................................................... 3-33

Configuring Traffic Prioritization ........................................................................... 3-36

Using Virtual LAN ............................................................................................................. 3-38

The Virtual LAN (VLAN) Concept ........................................................................ 3-39

Sample Applications of VLANs using the EDS-728 .............................................. 3-41

Configuring 802.1Q VLAN .................................................................................... 3-42

Using Multicast Filtering.................................................................................................... 3-43

The Concept of Multicast Filtering ......................................................................... 3-44

Configuring IGMP Snooping .................................................................................. 3-47

Add Static Multicast MAC...................................................................................... 3-48

Configuring GMRP................................................................................................. 3-49

Multicast Filtering Behavior ................................................................................... 3-50

Using Bandwidth Management .......................................................................................... 3-51

Configuring Bandwidth Management..................................................................... 3-51

Using Port Access Control.................................................................................................. 3-52

Configuring IEEE 802.1X....................................................................................... 3-54

Static Port Lock....................................................................................................... 3-57

Using IP Filter .................................................................................................................... 3-58

Using Auto Warning........................................................................................................... 3-58

Configuring Email Warning.................................................................................... 3-58

Email Alarm Events Settings .................................................................................. 3-59

Email Settings ......................................................................................................... 3-60

Configuring Relay Warning .................................................................................... 3-61

Relay Alarm Events Settings................................................................................... 3-62

Relay Alarm List ..................................................................................................... 3-63

Using Line-Swap-Fast-Recovery........................................................................................ 3-63

Configuring Line-Swap Fast Recovery................................................................... 3-63

Using Set Device IP............................................................................................................ 3-64

Configuring Set Device IP ...................................................................................... 3-65

Using Diagnosis.................................................................................................................. 3-65

Mirror Port .............................................................................................................. 3-65

Ping ......................................................................................................................... 3-66

Using Monitor .................................................................................................................... 3-67

Monitor by Switch................................................................................................... 3-67

Monitor by Port ....................................................................................................... 3-67

Using the MAC Address Table ........................................................................................... 3-68

Using System Log .............................................................................................................. 3-69

Event Log................................................................................................................ 3-69

Syslog Settings ........................................................................................................ 3-70

Using HTTPS/SSL ............................................................................................................. 3-71

Chapter 4 EDS Configurator GUI...............................................................................4-1

Starting EDS Configurator ................................................................................................... 4-2

Broadcast Search .................................................................................................................. 4-2

Search by IP address............................................................................................................. 4-3

Upgrade Firmware................................................................................................................ 4-3

Modify IP Address................................................................................................................ 4-4

Export Configuration............................................................................................................ 4-5

Import Configuration............................................................................................................ 4-6

Unlock Server....................................................................................................................... 4-7

Appendix A MIB Groups...............................................................................................A-1

Chapter 1 Introduction

Welcome to the Moxa EtherDevice Switch EDS-728 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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Overview

Network planning is easy and flexible with the EDS-728, which has a modular design that lets you install up to 4 Gigabit ports and 24 fast Ethernet ports in one switch. Choose from two 2-port Gigabit modules with copper or fiber optic connectors, and eight 4-port Fast Ethernet modules with copper or fiber optic (SC/ST) connectors. The EDS-728 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 ABC-01 for configuration back-up, network redundancy, and intelligent network management. The EDS-728 provides more flexibility, reliability, and application-oriented functions to meet the demands of any harsh industrial application.

Package Checklist

Moxa’s EDS-728 is shipped with the following items. If any of these items is missing or damaged, please contact your customer service representative for assistance.

y 1 Moxa EDS-728 modular switch system or Interface Module y Hardware Installation Guide y CD-ROM with User’s Manual and Windows Utility (for EDS-728 modular switch system

only)

y Moxa Product Warranty booklet y RJ45 to DB9 Console port cable

NOTE: Please notify your Moxa sales representative if any of the above items is missing or damaged.

Features

Industrial Networking Capability

y Redundant Gigabit Ethernet Ring Capability (recovery time < 50 ms at full load) y Redundant Turbo Ring V2 Capability (recovery time < 20 ms at full load) y IGMP Snooping and GMRP for filtering multicast traffic from industrial Ethernet Protocols y Supports IEEE 802.1Q VLAN and GVRP protocol to ease network planning y Supports QoS—IEEE 802.1p/1Q and TOS/DiffServ to increase determinism

y Supports 802.3ad, LACP for optimum bandwidth utilization y Supports IEEE 802.1X and SSL to enhance network security y 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 Two 2-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 ACB-01 (optional kit) support for loading or saving configurations y Long-haul transmission distance of 40 km or 80 km y Redundant, dual DC power inputs y IP 30, rugged high-strength metal case

EDS-728 Series User’s Manual Introduction

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y DIN-Rail or panel mounting ability y Bandwidth management to prevent unpredictable network status y Lock port for authorized MAC address access only y Port mirroring for online debugging y Automatic warning by exception through email, relay output y Digital inputs to integrate a sensor and alarm with an IP network y Automatic recovery of connected device IP addresses y Line-swap fast recovery

Useful Utility and Remote Configuration

y Configurable by Web browser, Telnet/Serial console, Windows utility y Send ping commands to identify network segment integrity

Recommended Software and Accessories

y EDS-SNMP OPC Server Pro y DR-4524, DR-75-24, DR-120-24 DIN-Rail 24 VDC Power Supply Series y WK-32: Wall Mounting Kit y ABC-01 (Auto Backup Configurator): RJ-type RS-232 backup configurator

Chapter 2 Getting Started

This chapter explains how to access the EDS-728 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 the EDS-728 to a PC’s COM port, can be used if you do not know the EDS-728’s IP address. The Telnet console and web browser connection methods can be used to access the EDS-728 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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RS-232 Console Configuration (115200, None, 8, 1, VT100)

NOTE

Connection Caution!

1. You cannot connect to the EDS-728 simultaneously by serial console and Telnet.

2. You can connect to the EDS-728 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-728.

NOTE

We recommend using Moxa PComm Terminal Emulator, which can be downloaded free of charge from Moxa’s website.

Before running PComm Terminal Emulator, use an RJ45 to DB9-F (or RJ45 to DB25-F) cable to connect the EDS-728’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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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. The EDS-728’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

Up/Down/Left/Right arrows, or Tab Move the onscreen cursor

Enter Display & select options

Space Toggle options

Esc Previous Menu

EDS-728 Series User’s Manual Getting Started

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Configuration by Telnet Console

You may use Telnet to access the EDS-728’s console utility over a network. To be able to access the EDS’s functions over the network (by Telnet or Web Browser) from a PC host that is connected to the same LAN as the EDS-728, you need to make sure that the PC host and the EDS-728 are on the same logical subnetwork. To do this, check your PC host’s IP address and subnet mask. By default, the EDS-728’s IP address is 192.168.127.253 and the EDS-728’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.

NOTE

To use the EDS-728’s management and monitoring functions from a PC host connected to the same LAN as the EDS-728, you must make sure that the PC host and the EDS-728 are on the same logical subnetwork.

NOTE

Before accessing the console utility via Telnet, first connect one of the EDS-728’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.

NOTE

The EDS-728’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 the EDS-728’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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3. The Console login screen will appear. Press Enter to open the Account pop-up selector and

NOTE

The Telnet Console looks and operates in precisely the same manner as the RS-232 Console.

Configuration by Web Browser

The Moxa EDS-728’s web browser interface provides a convenient way to modify the switch’s configuration and access the built-in monitoring and network administration functions. The recommended web browser is Microsoft Internet Explorer 5.5 or 6.0 with JVM (Java Virtual Machine) installed.

NOTE

If the EDS-728 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

Before accessing the EDS-728’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

The EDS-728’s default IP is 192.168.127.253.

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Follow the steps below to access the EDS-728’s web browser interface.

1. Open Internet Explorer and type the EDS-728’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.

NOTE

By default, the EDS-728’s password is not set (i.e., is blank).

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 the Moxa EtheDevice Switch’s functions.

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Disabling Telnet and Browser Access

If you are connecting the EDS-728 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.

Chapter 3 Featured Functions

This chapter explains how to access the EDS-728’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 the EDS-728 to a PC’s COM port, can be used if you do not know IP address for the EDS-728. The Telnet console and web browser connection methods can be used to access the EDS-728 over an Ethernet LAN, or over the Internet.

The Web Console is the most user-friendly way to configure the EDS-728. 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 IP Filter



Using Auto Warning



Using Line-Swap-Fast-Recovery



Using Set Device IP



Using Diagnosis



Using Monitor



Using the MAC Address Table



Using System Log



Using HTTPS/SSL

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Overview

A brief description of each function group of your EDS-728 is shown on the Overview web page.

Configuring Basic Settings

The Basic Settings group includes the most commonly used settings required by administrators to maintain and control the EDS-728.

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 Characters

This option is useful for specifying the role or application of different EDS-728 units. E.g., Factory Switch 1.

Industrial Redundant Switch [Serial No. of this switch]

Switch Location

Setting Description Factory Default

Max. 80 Characters

To specify the location of different EDS-728 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-728 unit.

None

Maintainer Contact Info

Setting Description Factory Default

Max. 30 Characters

To provide information about whom to contact in order to resolve problems. Use this space to record contact information of the person responsible for maintaining this EDS-728.

None

Maintainer Contact Info

Setting Description Factory Default

Disable To disable http and https connections both

http or https To allow either http or https connections

https only

To allow https connection only

http or https

Password

The EDS-728 provides two levels of access privilege: admin privilege gives read/write access of all EDS-728 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

The EDS-728’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 “admin” privilege allows the user to modify all

EDS-728 configurations.

user “user” privilege only allows viewing the EDS-728

configurations.

admin

Password

Setting Description Factory Default

Old Password (Max. 16 Characters)

Type current password when changing the password

None

New Password (Max. 16 Characters)

Type new password when changing the password None

Retype Password (Max. 16 Characters)

If you type a new password in the Password field, you will be required to retype the password in the Retype new password field before updating the new password.

None

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Accessible IP

The EDS-728 uses an IP address-based filtering method to control access to EDS-728 units.

Accessible IP Settings allows you to add or remove “Legal” remote host IP addresses to prevent unauthorized access. Access to the EDS-728 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-728. 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-728

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-728

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-728

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

192.168.1.1 to 192.168.1.254 192.168.1.0 / 255.255.255.0

192.168.0.1 to 192.168.255.254 192.168.0.0 / 255.255.0.0

192.168.1.1 to 192.168.1.126 192.168.1.0 / 255.255.255.128

192.168.1.129 to 192.168.1.254 192.168.1.128 / 255.255.255.128

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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 Description Factory Default

checked Allows data transmission through the port.

unchecked Immediately shuts off port access.

enabled

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 Defaul t

Max. 63 Characters Specify an alias for each port, and assist the

administrator in remembering important information about the port. E.g., PLC 1

None

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Port Transmission Speed

Setting Description Factory Defaul t

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.

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.

Auto-nego

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 the EDS-728 and connected devices.

Setting Description Factory Defaul t

Enable Enables flow control for this port when in

auto-nego mode.

Disable Disables flow control for this port when in

auto-nego mode.

Disable

Port Type

Setting Description Factory Defaul t

Auto Allows the port to auto detect the port type of the

opposing Ethernet device and change the port type accordingly.

MDI

MDIX

Choose the MDI or MDIX option if the opposing Ethernet device has trouble auto-negotiating for port type.

Auto

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 the EDS-728’s IP address manually.

By DHCP The EDS-728’s IP address will be assigned

automatically by the network’s DHCP server.

By BootP The EDS-728’s IP address will be assigned

automatically by the network’s BootP server.

Disable

Switch IP Address

Setting Description Factory Default

IP Address of the EDS-728 Identifies the EDS-728 on a TCP/IP network. 192.168.127.253

Switch Subnet Mask

Setting Description Factory Default

Subnet mask of the EDS-728

Identifies the type of network to which the EDS-728 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-728

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 network. After entering the DNS Server’s IP address, you can input the EDS-728’s url (e.g., www.eds.company.com) in your browser’s address field, instead of entering the IP address.

None

2nd DNS Server’s IP Address

The IP address of the DNS Server used by your network. The EDS-728 will try to locate the 2nd DNS Server if the 1st DNS Server fails to connect.

None

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Time

The EDS-728 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.

NOTE

The EDS-728 does not have a real time clock. The user must update the Current Time and Current Date to set the initial time for the EDS-728 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.

Current Time

Setting Description Factory Default

User adjustable time. The time parameter allows configuration of the

local time in local 24-hour format.

None (hh:mm:ss)

Current Date

Setting Description Factory Default

User adjustable date. The date parameter allows configuration of the

local date in yyyy-mm-dd format.

None (yyyy/mm/dd)

Daylight Saving Time

Daylight saving time (also know as DST or summer time) involves advancing clocks (usually 1

hour) during the summer time to provide an extra hour of daylight in the afternoon.

Start Date

Setting Description Factory

User adjustable date.

The Start Date parameter allows users to enter the date that daylight saving time begins.

None

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Endt Date

Setting Description Factory

User adjustable date.

The End Date parameter allows users to enter the date that daylight saving time ends.

None

Offset

Setting Description Factory

User adjustable date.

The offset parameter indicates how many hours forward the clock should be advanced.

None

System Up Time

Indicates the EDS-728’s up time from the last cold start. The unit is seconds.

Time Zone

Setting Description Factory Default

User selectable time zone The time zone setting allows conversion from

GMT (Greenwich Mean Time) to local time.

GMT (Greenwich Mean Time)

NOTE

Changing the time zone will automatically correct the current time. You should configure the time zone before setting the time.

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).

2nd Time Server IP/Name

The EDS-728 will try to locate the 2nd NTP Server if the 1st NTP Server fails to connect.

None

Time Server Query Period

Setting Description Factory Default

Query Period This parameter determines how frequently the

time is updated from the NTP server.

600 seconds

System File Update—By Remote TFTP

The EDS-728 supports saving your configuration file to a remote TFTP server or local host to allow other EDS-728 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 the EDS-728.

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TFTP Server IP/Name

Setting Description Factory Default

IP Address of TFTP Server

The IP or name of the remote TFTP server. Must be set up before downloading or uploading files.

None

Configuration file path and name

Setting Description Factory Default

Max. 40 Characters The path and file name of the EDS-728’s

configuration file in the TFTP server.

None

Firmware file path and name

Setting Description Factory Default

Max. 40 Characters The path and file name of the EDS-728’s firmware

file.

None

Log file path and name

Setting Description Factory Default

Max. 40 Characters The path and file name of the EDS-728’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.

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System File Update—By Local Import/Export

Configuration File

To export the configuration file of this EDS-728, click on Export to save it to the local host.

Log File

To export the Log file of this EDS-728, click on Export and save it to the local host.

NOTE

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.

Upgrade Firmware

To import the firmware file of this EDS-728, 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-728, click on Browse to select the configuration file

already saved on your computer. The upgrade procedure will proceed automatically after clicking

on Import.

System File Update—By Backup Media

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Auto load system configurations when system boots up

Setting Description Factory Default

Enable

Enables Auto load system configurations when system boots up

Disable

Disables Auto load system configurations when system boots up

Enable

Save the current configurations to ABC

To export the current configuration file of the EDS-728, click on Save to save it to the ABC.

Load the ABC’s configurations to the Switch

To import the configuration file of the EDS-728, click on Load to load it to the Switch

Restart

This function is used to restart the Moxa EtherDevice Switch

Factory Default

The Factory Default function is included to give users a quick way of restoring the EDS-728’s configuration settings to their factory default values. This function is available in the Console utility (serial or Telnet) and Web Browser interface.

NOTE

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-728.

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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.

The EDS-728’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-728 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.

The Port Trunking Concept

The EDS-728 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.

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 Load sharing—MAC Client traffic may be distributed across multiple links.

Keep the following points in mind when configuring port trunking:

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.

y Up to 4 port trunking groups (designated Trk1, Trk2, Trk3, Trk4) can be used for each

EDS-728.

y Up to 8 ports can be inserted into each port trunk group. The EDS-728 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.

y 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.

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y Full duplex operation only—Link Aggregation is supported only on point-to-point links with

MACs operating in full duplex mode.

y Multipoint Aggregations—The 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 Communication Redundancy will be set to the factory default. y 802.1Q VLAN will be set to the factory default and will be disabled. y Multicast Filtering will be set to the factory default. y Port Lock will be set to the factory default and will be disabled. y Set Device IP will be set to the factory default y 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.

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

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Trunk Type

Setting Description Factory Default

Static Designated Moxa proprietary trunking protocol Static

LACP

Designated LACP (IEEE 802.3ad, Link Aggregation Control Protocol)

Static

Member Ports/Available Ports

Setting Description Factory Default

Member/Available Ports

Use Up/Down buttons to add/remove specific ports

from available ports to/from trunk group.

N/A

Check box Check to designate which ports to add or remove. Unchecked

Port Port number N/A

Port description Displays the media type for each module’s port N/A

Name Max. 63 Characters N/A

Speed

Indicates the transmission speed (100M-Full, 100M-Half, 10M-Full, or 10M-Half)

N/A

FDX Flow Control

Indicates if the FDX flow control of this port is “Enabled” or “Disabled.”

N/A

Add designated ports into trunk group from available ports.

N/A

Down

Remove designated ports from trunk group to available port.

N/A

Trunk Table

Setting Description

Trunk Group Displays the Trunk Type and Trunk Group.

Member Port Display which member ports belong to the trunk group.

Status Success means port trunking is working properly.

Fail means port trunking is not working properly.

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Configuring SNMP

The EDS-728 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 the EDS-728 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

UI Setting

Authentication

Type

Data

Encryption

Method

V1, V2c Read Community

Community string

Use a community string match for authentication

SNMP V1, V2c

V1, V2c Write/Read Community

Community string

Use a community string match for authentication

No-Auth No No

Use account with admin or user to access objects

MD5 or SHA

Authentication based on MD5 or SHA

Provides authentication based on HMAC-MD5, or HMAC-SHA algorithms. 8-character passwords are the minimum requirement for authentication.

SNMP V3

MD5 or SHA

Authentication based on MD5 or SHA

Data encryption key

Provides authentication based on HMAC-MD5 or HMAC-SHA algorithms, and data encryption key. 8-character passwords and a data encryption key are the 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

V1, V2c Read Community

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.

public

V1, V2c Write/Read Community

Setting Description Factory Default

V1, V2c Read/Write Community

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.

private

For SNMP V3, there are two levels of privilege for different accounts to access the EDS-728.

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

No-Auth

Use admin. account to access objects. No authentication

MD5Auth

Provide authentication based on the HMAC-MD5 algorithms. 8-character passwords are the minimum requirement for authentication.

SHAAuth

Provide authentication based on the HMAC-SHA algorithms. 8-character passwords are the minimum requirement for authentication.

Admin Data Encryption Key (for SNMP V1, V2c, V3, and V3 only)

Setting Description Factory Default

Enable

8-character data encryption key is the minimum requirement for data encryption (maximum of 30 characters)

Disable No data encryption No

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User Auth. Type (for SNMP V1, V2c, V3 and V3 only)

Setting Description Factory Default

No-Auth

Use admin account or user account to access objects. No authentication.

MD5-Auth

Provides authentication based on the HMAC-MD5 algorithms. 8-character passwords are the minimum requirement for authentication.

SHA-Auth

Provides authentication based on the HMAC-SHA algorithms. 8-character passwords are the minimum requirement for authentication.

User Data Encryption Key (for SNMP V1, V2c, V3 and V3 only)

Setting Description Factory Default

Enable

8-character data encryption key is the minimum requirement for data encryption (maximum of 30 characters)

Disable No data encryption No

Trap Settings

There are two settings for the EDS-728’s redundant trap servers.

Trap Server IP/Name

Setting Description Factory Default

IP or Name

Enter the IP address or name of the Trap Server used by your network.

None

Trap Community

Setting Description Factory Default

character string

Use a community string match for authentication (maximum of 30 characters).

public

Private MIB information

Switch Object ID

Setting Description Factory Default

8691.7.1 The EDS-728’s enterprise value Fixed

NOTE: The Switch Object ID cannot be changed.

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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 feature is particularly important for industrial applications, since it could take several minutes to locate the disconnected or severed cable. For example, if the EDS-728 is used as a key communications component of a production line, several minutes of downtime could result in a big loss in production and revenue. The EDS-728 supports three different protocols to

support this communication redundancy function— Rapid Spanning Tree/ Spanning Tree Protocol (IEEE 802.1W/1D), Turbo Ring, and Turbo Ring V2.

When configuring a redundant ring, all switches on the same ring must be configured to use the same redundancy protocol. You cannot mix the “Turbo Ring,” “Turbo Ring V2,” and STP/RSTP protocols on the same ring. The following table 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 V2 Turbo Ring STP RSTP

Topology Ring Ring Ring, Mesh Ring, Mesh

Recovery Time < 20 ms < 300 ms Up to 30 sec. Up to 5 sec

NOTE

Most of Moxa’s managed switches now support two proprietary Turbo Ring protocols:

1. “Turbo Ring” refers to the original version of Moxa’s proprietary redundant ring

protocol, which has a recovery time of under 300 ms.

2. “Turbo Ring V2” refers to the new generation Turbo Ring, which has a recovery time of

under 20 ms.

In this manual, we use the terminology “Turbo Ring” ring and “Turbo Ring V2” ring to

differentiate between rings configured for one or the other of these protocols.

Gigabit Ethernet Redundant Ring Capability (< 50 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. The EDS-728, 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 less than 300 ms (Turbo Ring) or 50 ms (Turbo Ring V2).

NOTE

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.

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The Turbo Ring Concept

The Turbo Ring and Turbo Ring V2 protocols identify one switch as the master of the network,

and then automatically block packets from traveling through any of the network’s redundant loops. In the event that one branch of the ring gets disconnected from the rest of the network, the protocol automatically readjusts the ring so that the part of the network that was disconnected can reestablish contact with the rest of the network.

Initial Setup of a “Turbo Ring” or “Turbo Ring V2” ring.

1. For each switch in the ring select any

two ports as the redundant ports.

2. Connect redundant ports on neighboring

switches to form the redundant ring.

The user does not need to configure any of the switches as the master to use Turbo Ring or Turbo Ring V2. If none of the switches in the ring is configured as the master, then the protocol will automatically assign master status to one of the switches. In fact, the master is only used to identify which segment in the redundant ring acts as the backup path. In the following subsections, we explain how the redundant path is selected for rings configured for Turbo Ring, and Turbo Ring V2.

Determining the Redundant Path of a “Turbo Ring” Ring

In this case, the redundant segment (i.e., the segment that will be blocked during normal operation) is determined by the number of EDS-728 units that make up the ring, and where the ring master is located.

“Turbo Ring” rings with an even number of EDS-728 units.

If there are 2N EDS-728 units (an even number) in the “Turbo Ring” ring, then the backup segment is one of the two segments connected to the (N+1)st EDS-728 (i.e., the EDS-728 unit directly opposite the master).

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“Turbo Ring” rings with an odd number of EDS-728 units.

If there are 2N+1 EDS-728 units (an odd number) in the “Turbo Ring” ring, with EDS-728 units and segments labeled counterclockwise, then segment N+1 will serve as the backup path.

For the example shown here, N=1, so that N+1=2.

Determining the Redundant Path of a “Turbo Ring V2” Ring.

For a “Turbo Ring V2” ring, the backup segment is the segment connected to the 2nd redundant port on the master.

See Configuring “Turbo Ring V2” in the

Configuring “Turbo Ring” and “Turbo Ring V2” section below.

Ring Coupling Configuration

For some systems, it may not be convenient to connect all devices in the system to create one BIG redundant ring, since some devices could be located in a remote area. For these systems, “Ring Coupling” can be used to separate the devices into different smaller redundant rings, but in such a way that they can still communicate with each other.

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-728 units.

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Ring Coupling for a “Turbo Ring” Ring.

To configure the Ring Coupling function for a “Turbo Ring” ring, select two EDS-728 units (e.g., Switch A and B in the above figure) in the ring, and another two EDS-728 units in the adjacent ring (e.g., Switch C and D).

Decide which two ports in each switch are appropriate to be used as coupling ports, and then link them together. Next, assign one switch (e.g., Switch A) to be the “coupler,” and connect the coupler’s coupling control port with Switch B (for this example).

The coupler switch (i.e., Switch A) will monitor switch B through the coupling control port to determine whether or not the coupling port’s backup path should be recovered.

Ring Coupling for a “Turbo Ring V2” Ring.

Note that the ring coupling settings for a “Turbo Ring V2” ring are different from a “Turbo Ring” ring. For Turbo Ring V2, Ring Coupling is enabled by configuring the “Coupling Port (Primary)” on Switch B, and the “Coupling Port (Backup)” on Switch A only. You do not need to set up a coupling control port, so that a “Turbo Ring V2” ring does not use a coupling control line.

The “Coupling Port (Backup)” on Switch A is used for the backup path, and connects directly to an extra network port on Switch C. The “Coupling Port (Primary)” on Switch B monitors the status of the main path, and connects directly to an extra network port on Switch D. With ring coupling established, Switch A can activate the backup path as soon as it detects a problem with

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the main path.

ATTENTION

Ring Coupling only needs to be enabled on one of the switches serving as the Ring Coupler. The Coupler must designate different ports as the two Turbo Ring ports and the coupling port.

NOTE

You do not need to use the same EDS-728 unit for both Ring Coupling and Ring Master.

Dual-Ring Configuration (applies only to “Turbo Ring V2”)

The “dual-ring” option provides another ring coupling configuration, in which two adjacent rings share one switch. This type of configuration is ideal for applications that have inherent cabling difficulties.

Daul-Ring for a “Turbo Ring V2” Ring.

Dual-Homing Configuration (appl ie s onl y to “Turbo Ring V2”)

The “dual-homing” option uses a single Ethernet switch to connect two networks. The primary path is the operating connection, and the backup path is a back-up connection that is activated in the event that the primary path connection fails.

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Dual-Homing for a “Turbo Ring V2” Ring.

Configuring “Turbo Ring” and “Turbo Ring V2”

Use the Communication Redundancy page to configure select “Turbo Ring” or “Turbo Ring

V2.” Note that configuration pages for these two protocols are different.

Configuring “Turbo Ring”

Explanation of “Current Status” Items

Now Active

Shows which communication protocol is in use: Turbo Ring, Turbo Ring V2, RSTP, or none.

Master/Slave

Indicates whether or not this EDS-728 is the Master of the Turbo Ring. (This field appears only when selected to operate in Turbo Ring or Turbo Ring V2 mode.)

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NOTE

The user does not need to set the master to use Turbo Ring. If no master is set, the Turbo Ring protocol will assign master status to one of the EDS-728 units in the ring. The master is only used to determine which segment serves as the backup path.

Redundant Port Status (1st Port, 2nd Port) Ring Coupling Ports Status (coupling Port, Coupling Control Port)

The “Ports Status” indicators show Forwarding for normal transmission, Blocking if this port is connected to a backup path and the path is blocked, and Link down if there is no connection.

Explanation of “Settings” Items

Redundancy Protocol

Setting Description Factory Def au l t

Turbo Ring

Select this item to change to the Turbo Ring configuration page.

Turbo Ring V2

Select this item to change to the Turbo Ring V2 configuration Page.

RSTP (IEEE

802.1W/1D)

Select this item to change to the RSTP configuration page.

RSTP (IEEE 802.1W/1D) (No ports are enabled.)

Set as Master

Setting Description Factory Def au l t

Enable/Disable Select this EDS-728 as Master

Disabled

Do not select this EDS-728 as Master.

Not checked.

Redundant Ports

Setting Description Factory Def au l t

1st Port

Select any port of the EDS-728 to be one of the redundant ports.

1-1

2nd Port

Select any port of the EDS-728 to be one of the redundant ports.

1-2

Enable Ring Coupling

Setting Description Factory Def au l t

Enable/Disable Select this EDS-728 as Coupler

Disable

Do not select this EDS-728 as coupler.

Not checked.

Coupling Ports

Setting Description Factory Def au l t

Coupling Port

Select any port of the EDS-728 to be the coupling port

1-3

Coupling Control Port

Setting Description Factory Def au l t

Coupling Control Port

Select any port of the EDS-728 to be the coupling port

1-4

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Configuring “Turbo Ring V2”

NOTE

When using the Dual-Ring architecture, users must configure settings for both Ring 1 and Ring 2. In this case, the status of both rings will appear under “Current Status.”

Explanation of “Current Status” Items

Now Active

Shows which communication protocol is in use: Turbo Ring, Turbo Ring V2, RSTP, or none.

Ring 1/2—Status

Shows Healthy if the ring is operating normally, and shows Break if the ring’s backup link is

active.

Ring 1/2—Master/Slave

Indicates whether or not this EDS-728 is the Master of the Turbo Ring. (This field appears only when selected to operate in Turbo Ring or Turbo Ring V2 mode.)

NOTE

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Ring 1/2—1st Ring Port Status Ring 1/2—2nd Ring Port Statu

The “Ports Status” indicators show Forwarding for normal transmission, Blocking if this port is connected to a backup path and the path is blocked, and Link dow n if there is no connection.

Coupling—Mode

Indicates either None, Dual Homing, or Ring Coupling.

Coupling—Coupling Port status

Indicates either Primary, or Backup. Explanation of “Settings” Items

Redundancy Protocol

Setting Description Factory Def au l t

Turbo Ring

Select this item to change to the Turbo Ring configuration page.

Turbo Ring V2

Select this item to change to the Turbo Ring V2 configuration Page.

RSTP (IEEE

802.1W/1D)

Select this item to change to the RSTP configuration page.

RSTP (IEEE 802.1W/1D) (No ports are enabled.)

Enable Ring 1

Setting Description Factory Def au l t

Enable Enable the Ring 1 settings

Disable Disable the Ring 1 settings

Not checked.

Enable Ring 2*

Setting Description Factory Def au l t

Enable Enable the Ring 2 settings

Disable Disable the Ring 2 settings

Not checked.

*You should enable both Ring 1 and Ring 2 when using the Dual-Ring architecture.

Set as Master

Setting Description Factory Def au l t

Enable Select this EDS-728 as Master

Disable

Do not select this EDS-728 as Master

Not checked.

Redundant Ports

Setting Description Factory Def au l t

1st Port

Select any port of the EDS-728 to be one of the redundant ports.

Ring 1: 1

port of last IM module Ring 2: not defined**

2nd Port

Select any port of the EDS-728 to be one of the redundant ports.

Ring 1:2

port of last IM module Ring 2: not defined**

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Enable Ring Coupling

Setting Description Factory Def au l t

Enable Select this EDS-728 as Coupler

Disable

Do not select this EDS-728 as Coupler

Not checked

Coupling Mode

Setting Description Factory Def au l t

Dual Homing

Select this item to change to the Dual Homing configuration page.

Primary Port: not defined** Backup Port: not defined**

Ring Coupling (backup)

Select this item to change to the Ring Coupling (backup) configuration page.

Coupling Port: not defined**

Ring Coupling (primary)

Select this item to change to the Ring Coupling (primary) configuration page

Coupling Port: not defined**

Primary/Backup Port

Setting Description Factory Def au l t

Primary Port

Select any port of the EDS-728 to be the primary ports.

not defined**

Backup Port

Select any port of the EDS-728 to be the backup port.

not defined**

**You should manual adjust this port into another available port before enabling the architecture.

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. The EDS-728’s STP feature is disabled by default. To be completely effective, you must enable RSTP/STP on every EDS-728 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 The topology of a bridged network will be determined much more quickly compared to STP. y RSTP is backward compatible with STP, making it relatively easy to deploy. For example:

¾ Defaults to sending 802.1D style BPDUs if packets with this format are received. ¾ STP (802.1D) and RSTP (802.1w) can operate on different ports of the same EDS-728.

This feature is particularly helpful when the EDS-728’s 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.

NOTE

The STP protocol is part of the IEEE Std 802.1D, 1998 Edition bridge specification. The explanation given below uses bridge instead of switch.

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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.

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.

Port Speed Path Cost 802.1D,

1998 Edition

Path Cost

802.1w-2001

10 Mbps 100 2,000,000

100 Mbps 19 200,000

1000 Mbps 4 20,000

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.

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.

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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:

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-728 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 Description Factory Default

Turbo Ring 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

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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.

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.

Enable STP per Port

Setting Description Factory Default

Enable/Disable Select to enable the port as a node on the

Spanning Tree topology.

Disabled

NOTE

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.

Port Priority

Setting Description Factory Default

Numerical value selected by user

Increase this port’s priority as a node on the Spanning Tree topology by inputting a lower number.

128

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

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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)

The EDS-728’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.

Using Traffic Prioritization

The EDS-728’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. The EDS-728 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. The EDS-728’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 Improve network performance by controlling a wide variety of traffic and managing

congestion.

y Assign priorities to different categories of traffic. For example, set higher priorities for

time-critical or business-critical applications.

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y Provide predictable throughput for multimedia applications, such as video conferencing or

voice over IP, and minimize traffic delay and jitter.

y 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-728 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.

The EDS-728’s traffic prioritization depends on two industry-standard methods:

y IEEE 802.1D—a layer 2 marking scheme. y 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.

IEEE 802.1p Priority Level IEEE 802.1D Traffic Type

0 Best Effort (default)

1 Background

2 Standard (spare)

3 Excellent Effort (business critical)

4 Controlled Load (streaming multimedia)

5 Video (interactive media); less than 100 milliseconds

of latency and jitter

6 Voice (interactive voice); less than 10 milliseconds of

latency and jitter

7 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.

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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 No extra tags are required in the packet. y DSCP uses the IP header of a packet and therefore priority is preserved across the Internet. y DSCP is backward compatible with IPV4 TOS, which allows operation with existing devices

that use a layer 3 TOS enabled prioritization scheme.

Traffic Prioritization

The EDS-728 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-728 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.

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-728 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-728 hardware has multiple traffic queues that allow packet prioritization to occur. Higher priority traffic can pass through the EDS-728 without being delayed by lower priority traffic. As each packet arrives in the EDS-728, 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.

The EDS-728 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.

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Configuring Traffic Prioritization

Quality of Service (QoS) provides a traffic prioritization capability to ensure that important data is delivered consistently and predictably. The EDS-728 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. The EDS-728 Series’ QoS capability improves your industrial network’s performance and determinism for mission critical applications.

QoS Classification

The EDS-728 supports inspection of layer 3 TOS and/or layer 2 CoS tag information to determine how to classify traffic packets.

Queuing Mechanism

Setting Description Factory Default

Weighted Fair The EDS-728 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.

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.

Weight Fair

Inspect TOS

Setting Description Factory Default

Enable/Disable Check the checkbox to enable the EDS-728 to inspect

the Type of Service (TOS) bits in IPV4 frame to determine the priority of each frame.

Enable

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Inspect COS

Setting Description Factory Default

Enable/Disable Check the check box to enable the EDS-728 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

NOTE

The priority of an ingress frame is determined in order by:

1. Inspect TOS

2. Inspect CoS

3. Default Port Priority

NOTE

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.

CoS Mapping

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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

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-728 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.

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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 Departmental groups—You could have one VLAN for the Marketing department, another

for the Finance department, and another for the Development department.

y Hierarchical groups—You could have one VLAN for directors, another for managers, and

another for general staff.

y Usage groups—You could have one VLAN for e-mail users, and another for multimedia

users.

Benefits of VLANs

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 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.

y 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.

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VLANs and Moxa EtherDevice Switch

Your EDS-728 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-728 to be placed in:

y Any one VLAN defined on the EDS-728. y 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-728 before the switch can use it to forward traffic:

Managing a VLAN

A new or initialized EDS-728 contains a single VLAN—the Default VLAN. This VLAN has the following definition:

y VLAN Name—Management VLAN y 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-728 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-728 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 the EDS-728, while inter-switch connections will be tagged members of all VLANs, defined as “Trunk Port” in the EDS-728.

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.

The EDS-728 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), the EDS-728 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

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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 the EDS-728

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.

y Port 3 connects with another switch. It should be configured as “Trunk Port.” GVRP protocol

will be used through the Trunk Port.

y Port 4 connects a single untagged device and assigns it to VLAN 2; it should be configured as

“Access Port” with PVID 2.

y Port 5 connects a single untagged device and assigns it to VLAN 3; it should be configured as

“Access Port” with PVID 3.

y Port 6 connect a single untagged device and assigns it to VLAN 5; it should be configured as

“Access Port” with PVID 5.

y 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 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.

y 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.

y 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

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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

To configure the EDS-728’s 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-728 units.

Management VLAN ID

Setting Description Factory Default

VLAN ID ranges from 1 to 4094

Set the management VLAN of this EDS-728. 1

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Port PVID

Setting Description Factory Default

VID range from 1 to 4094

Set the port default VLAN ID for untagged devices that connect to the port.

Port Fixed VLAN List (Tagged)

Setting Description Factory Default

VID range from 1 to 4094

This field will be active only when selecting the “Trunk” port type. Set the other VLAN ID for tagged devices that connect to the “Trunk” port. Use commas to separate different VIDs.

None

Port Forbidden VLAN List

Setting Description Factory Default

VID range from 1 to 4094

This field will be active only when selecting the “Trunk” port type. Set the VLAN IDs that will not be supported by this trunk port. Use commas to separate different VIDs.

None

VLAN Table

In this table, you can review the VLAN groups that were created, Joined Access Ports, and Trunk Ports.

NOTE

The physical network can have a maximum of 64 VLAN settings.

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-728.

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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 Uses the most efficient, sensible method to deliver the same information to many receivers

with only one transmission.

y Reduces the load on the source (for example, a server) since it will not need to produce

several copies of the same data.

y Makes efficient use of network bandwidth and scales well as the number of multicast group

members increases.

y 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 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.

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Network without multicast filtering

12345678

Serial ports

Console LAN

910111213141516

IGMP Group2

Group 1 Multicast Stream Group 2 Multicast Stream

IGMP Group1 IGMP Group2 IGMP Group1

All hosts receive the multicast traffic, even if they don’t need it.

Network with multicast filtering

Hosts only receive dedicated traffic from other hosts belonging to the same group.

Multicast Filtering and Moxa EtherDevice Switch

The EDS-728 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.

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Query Mode

Query mode allows the EDS-728 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-728 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).

NOTE

The EDS-728 is compatible with any device that conforms to the IGMP v2 and IGMP v3 device protocol.

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)

The EDS-728 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

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. The EDS-728 supports adding multicast groups manually to enable multicast filtering.

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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 Description Factory Default

Numerical value input by user

Set the query interval of the Querier function globally. Valid settings are from 20 to 600 seconds.

125 seconds

IGMP Snooping Enable

Setting Description Factory Default

Enable/Disable Click the checkbox to enable the IGMP Snooping

function globally.

Disabled

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

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Static Multicast Router Port

Setting Description Factory Default

Select/Deselect Click the checkbox to select which ports will connect to

the multicast routers. It’s active only when IGMP Snooping is enabled.

Disabled

Querier

Setting Description Factory Default

Enable/Disable Click the checkbox to enable the EDS-728’s querier

function.

Enabled if IGMP Snooping is Enabled Globally

NOTE

At least one switch must be designated the querier or enable IGMP snooping and GMRP when enabling Turbo Ring and IGMP snooping simultaneously.

IGMP Table

The EDS-728 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.

Add Static Multicast MAC

If required, the EDS-728 also supports adding multicast groups manually.

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Add New Static Multicast Address to the List

Setting Description Factory Default

MAC Address Input the multicast MAC address of this host. None

Join Port

Setting Description Factory Default

Select/Deselect Checkmark the appropriate check boxes to select the

join ports for this multicast group.

None

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

all ports that can enable the GMRP function

None

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

GMRP Table

The EDS-728 displays the current active GMRP groups that were detected

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Setting Description

Fixed Ports This multicast address is defined by static multicast.

Learned Ports This multicast address is learned by GMRP.

Multicast Filtering Behavior

You can use the following table to configure the multicast filtering behavior for each port. 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.

Multicast Filtering Behavior

Setting Description Factory Default

Forward All

Select to forward all multicast frames unless an explicit Static Filtering Entry specifies filtering (see Add Static Multicast MAC).

Forward Unknown

Select to forward the multicast frames unless (1) an explicit Static Filtering Entry specifies filtering (see Add Static Multicast MAC), or (2) an applicable Group Re

istration Entry specifies filtering.

Filter Unknown

Select to filter the multicast frames unless (1) an explicit Static Filtering Entry specifies filtering (see Add Static Multicast MAC), or (2) an applicable Group Registration Entry specifies filtering.

Forward Unknown

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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-728 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 or disable the Broadcast Storm Protection for broadcast and unknown unicast packets globally.

Enable/Disable

Check the check box to include multicast packets when enabled for Broadcast Storm Protection.

N/A

Traffic Rate Limiting Settings

Setting Description Factory Default

Ingress rate Select the ingress rate for all packets from the following

options: not limited, 3%, 5%, 10%, 15%, 25%, 35%, 50%, 65%, 85%

N/A

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Using Port Access Control

The EDS-728 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

The EDS-728 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. 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.

The EDS-728 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 the EDS-728 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:

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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.

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.

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Configuring IEEE 802.1X

802.1X

Setting Description Factory Default

Enable/Disable 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

Database Option

Setting Description Factory Default

Local (Max. 32 users)

Select this option when setting the Local User Database as the authentication database.

Local

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

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Shared Key

Setting Description Factory Default

alphanumeric (Max. 40 characters)

A key to be shared between the external RADIUS server and the EDS-728. Both ends must be configured to use the same key.

None

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 usernames and passwords in order to stay connected.

3600 seconds

802.1X Re-Authentication

The EDS-728 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

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Local User Database Setup

When setting the Local User Database as the authentication database, set the database first.

Local User Database Setup

Setting Description Factory Default

User Name (Max. 30 characters)

User Name for Local User Database None

Password (Max. 16 characters)

Password for Local User Database None

Description (Max. 30 characters)

Description for Local User Database None

NOTE

The user name for the Local User Database is case-insensitive.

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Port Access control Table

The port status will show authorized or unauthorized.

Static Port Lock

The EDS-728 also supports adding multicast groups manually if required.

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

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Using IP Filter

The EDS-728 provides an 8-entity IP filter for each port. You can specify the port and then key in the IPs from which the forbidden packets may come. These settings start working right after the

Activate button is clicked.

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. The EDS-728 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 the EDS-728’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-728’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.

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Email 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.

System Event Warning e-mail is sent when…

Switch Cold Start Power is cut off and then reconnected.

Switch Warm Start The EDS-728 is rebooted, such as when network

parameters are changed (IP address, subnet mask, etc.).

Power Transition (OnÆOff) The EDS-728 is powered down.

Power Transition (OffÆOn) The EDS-728 is powered up.

DI1 (OnÆOff) Digital Input 1 is triggered by on to off transition

DI1 (OffÆOn) Digital Input 1 is triggered by off to on transition

DI2 (OnÆOff) Digital Input 2 is triggered by on to off transition

DI2 (OffÆOn) Digital Input 2 is triggered by off to on transition

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.

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Port Event Warning e-mail is sent when…

Link-on The port is connected to another device.

Link-off

The port is disconnected (e.g., the cable is pulled out, or the opposing device shuts down).

Traffic-Overload

The port’s traffic surpasses the Traffic-Threshold for that port (provided this item is Enabled).

Traffic-Threshold (%)

Enter a nonzero number if the port’s Traffic-Overload item is Enabled.

Traffic-Duration (sec.)

A Traffic-Overload warning is sent every Traffic-Duration seconds if the average Traffic-Threshold is surpassed during that time period.

NOTE

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

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 the EDS-728’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.

Email Settings

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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 change Password

To reset the Password from the Web Browser interface, 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.

Disable

Old Password Type the current password when changing the password None

New Password Type new password when enabled to change password;

Max. 45 Characters.

None

Retype Password If you type a new password in the Password field, you

will be required to retype the password in the Retype new password field before updating the new password.

None

Email Address

Setting Description Factory Default

Max. 30 characters

You can set up to 4 email addresses to receive alarm emails from the EDS-728.

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.

NOTE

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.

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-728’s Relay Event Types.

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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.

The EDS-728 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.

System Event Warning Relay output is triggered when…

Power Transition (OnÆOff) The EDS-728 is powered on.

Power Transition (OffÆOn) The EDS-728 is powered down.

DI1 (OnÆOff) Digital Input 1 is triggered by on to off transition

DI1 (OffÆOn) Digital Input 1 is triggered by off to on transition

DI2 (OnÆOff) Digital Input 2 is triggered by on to off transition

DI2 (OffÆOn) Digital Input 2 is triggered by off to on transition

Port Event Warning e-mail is sent when…

Link-on The port is connected to another device.

Link-off

The port is disconnected (e.g., the cable is pulled out, or the opposing device shuts down).

Traffic-Overload

The port’s traffic surpasses the Traffic-Threshold for that port (provided this item is Enabled).

Traffic-Threshold (%)

Enter a nonzero number if the port’s Traffic-Overload item is Enabled.

Traffic-Duration (sec.)

A Traffic-Overload warning is sent every Traffic-Duration seconds if the average Traffic-Threshold is surpassed during that time period.

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NOTE

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.

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.

Using Line-Swap-Fast-Recovery

The Line-Swap Fast Recovery function, which is enabled by default, allows the EDS-728 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

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Using Set Device IP

To reduce the effort required to set up IP addresses, the EDS-728 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 the EDS-728 to assign specific IP addresses automatically to connected devices that are equipped with DHCP Client or RARP protocol. In

effect, the EDS-728 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, the EDS-728 sends the device the desired IP address.

Take the following steps to use the Set device IP function: STEP 1—set up the connected devices

Set up those Ethernet-enabled devices connected to the EDS-728 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 the EDS-728’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 the EDS-728’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.

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Configuring Set Device IP

Desired IP Address

Setting Description Factory Default

IP Address Set the desired IP of connected devices. None

Using Diagnosis

The EDS-728 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.

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Take the following steps to set up the Mirror Port function: STEP 1

Configure the EDS-728’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 three watch direction options:

y Output data stream

Select this option to monitor only those data packets being sent out through the EDS-728’s port.

y Input data stream

Select this option to monitor only those data packets coming in through the EDS-728’s port.

y Bi-directional

Select this option to monitor data packets both coming into, and being sent out through, the EDS-728’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.

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 the EDS-728 itself. In this way, the user can essentially “sit on top of the EDS-728” 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.

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Using Monitor

You can monitor statistics in real time from the EDS-728’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 the EDS-728’s 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 the EDS-728, 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.

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.

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Using the MAC Address Table

This section explains the information provided by the EDS-728’s MAC address table.

The MAC Address table can be configured to display the following the EDS-728 MAC address groups.

ALL Select this item to show all EDS-728’s MAC addresses

ALL Learned Select this item to show all EDS-728’s Learned MAC addresses

ALL Static Lock Select this item to show all EDS-728’s Static Lock MAC addresses

ALL Static Select this item to show all EDS-728’s Static/Static Lock /Static

Multicast MAC addresses

ALL Static Multicast

Select this item to show all EDS-728’s Static Multicast MAC addresses

Port x Select this item to show all MAC addresses of dedicated ports

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The table will display the following information:

MAC This field shows the MAC address

Type This field shows the type of this MAC address

Port This field shows the port that this MAC address belongs to

Priority This field shows the priority of this MAC address

Using System Log

Event Log

Bootup This field shows how many times the EDS-728 has been rebooted or cold started.

Date The date is updated based on how the current date is set in the “Basic Setting” page.

Time The time is updated based on how the current time is set in the “Basic Setting” page.

System Startup Time

The system startup time related to this event.

Events Events that have occurred.

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Syslog Settings

This function provides the event logs for the syslog server. The function supports 3 configurable syslog servers and syslog server UDP port numbers. When an event occurs, the event will be sent as a syslog UDP packet to the specified syslog servers.

Syslog Server 1

Setting Description Factory Default

IP Address Enter the IP address of 1st Syslog Server used by your

network.

None

Port Destination (1 to 65535)

Enter the UDP port of 1st Syslog Server. 514

Syslog Server 2

Setting Description Factory Default

IP Address Enter the IP address of 2nd Syslog Server used by your

network.

None

Port Destination (1 to 65535)

Enter the UDP port of 2nd Syslog Server. 514

Syslog Server 3

Setting Description Factory Default

IP Address Enter the IP address of 3rd Syslog Server used by your

network.

None

Port Destination (1 to 65535)

Enter the UDP port of 3rd Syslog Server. 514

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NOTE

The following events will be recorded into the EDS-728’s Event Log table, and will then be sent to the specified Syslog Server:

1. Cold start

2. Warm start

3. Configuration change activated

4. Power 1/2 transition (Off Æ On), Power 1/2 transition (On Æ Off)

5. Authentication fail

6. Topology changed

7. Master setting is mismatched

8. DI 1/2 transition (Off Æ On), DI 1/2 transition (On Æ Off)

9. Port traffic overload

10. dot1x Auth Fail

11. Port link off / on

Using HTTPS/SSL

To secure your HTTP access, the EDS-728 supports HTTPS/SSL to encrypt all HTTP traffic. Perform the following steps to access the EDS-728’s web browser interface via HTTPS/SSL.

1. Open Internet Explorer and type https://EDS-728’s IP address in the address field. Press Enter

to establish the connection.

2. Warning messages will pop out to warn the user that the security certificate was issued by a

company they have not chosen to trust.

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3. Select Yes to enter the EDS-728’s web browser interface and access the web browser interface

secured via HTTPS/SSL.

NOTE

Moxa provides a Root CA certificate .After installing this certificate into your PC or notebook, you can access the web browser interface directly and will not see any warning messages again. You may download the certificate from the EDS-728A’s CD-ROM.

Chapter 4 EDS Configurator GUI

EDS Configurator is a comprehensive Windows-based GUI that is used to configure and maintain multiple EDS switches. A suite of useful utilities is available to help you locate EDS 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 switches whose IP address is known, modify the network configurations of one or multiple EDS switches, and update the firmware of one or more EDS switches. EDS Configurator is designed to provide you with instantaneous control of all of your EDS 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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Starting EDS Configurator

To start EDS Configurator, locate and then run the executable file edscfgui.exe.

NOTE

You may download the EDS Configurator software from Moxa’s website at www.moxa.com

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 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.

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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 one EDS switch at a time. Note that the search is conducted by IP address, so you should be able to locate any EDS switch 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 switch 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.

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3. Click on the Upgrade Firmware toolbar icon

, 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 the EDS’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.

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Export Configuration

The Export Configuration utility is used to save the entire configuration of a specified EDS

switch 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.

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Import Configuration

The Import Configuration function is used to import an entire configuration from a text file to an

EDS switch. This utility can be used to transfer the configuration from one EDS switch 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.

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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 switch 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 Blank

The switch is not password protected, and “Broadcast Search” was used to locate it.

y Fixed

The switch is not password protected, and “Search by IP address” was used to locate it manually.

y Locked Fixed

The switch 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

The switch 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 switch will not require re-entering the server password.

Follow the steps given below to unlock a locked EDS switch (i.e., an EDS switch 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.

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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.

Appendix A MIB Groups

The EDS-728 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 the EDS-728 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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MIB II.10 – Transmission Group

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

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The EDS-728 also provides a private MIB file, located in the file “Moxa-EDS728-MIB.my” on the EDS-728 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. Module Inserted

9. Module Removed

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