Moxa Technologies PT-7728 User Manual

Moxa PowerTrans Switch

PT-7728 User’s Manual

www.moxa.com/product

First Edition, February 2008

Moxa Inc.

Tel: +886-2-8919-1230 Fax: +886-2-8919-1231

Web:

Moxa Technical Support

Worldwide: support@moxa.com The Americas

www.moxa.com

support@usa.moxa.com

Moxa PowerTrans Switch

PT-7728 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 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

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

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

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

Configuration by Telnet Console.......................................................................................... 2-4

Configuration by Web Browser ............................................................................................ 2-7

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

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

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

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

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

Accessible IP............................................................................................................. 3-4

Port ............................................................................................................................ 3-5

Network..................................................................................................................... 3-6

Time .......................................................................................................................... 3-8

Daylight Saving Time ............................................................................................... 3-8

System File Update—By Remote TFTP ................................................................... 3-9

System File Update—By Local Import/Export....................................................... 3-11

Factory Default........................................................................................................ 3-11

Using Port Trunking ........................................................................................................... 3-12

The Port Trunking Concept..................................................................................... 3-12

Configuring Port Trunking...................................................................................... 3-13

Configuring SNMP............................................................................................................. 3-14

SNMP Read/Write Settings..................................................................................... 3-15

Trap Settings ........................................................................................................... 3-16

Private MIB information ......................................................................................... 3-17

Using Communication Redundancy................................................................................... 3-17

The Turbo Ring Concept......................................................................................... 3-18

Configuring Turbo Ring and Turbo Ring V2.......................................................... 3-22

The STP/RSTP Concept.......................................................................................... 3-27

Configuring STP/RSTP........................................................................................... 3-32

Using Traffic Prioritization................................................................................................. 3-34

The Traffic Prioritization Concept .......................................................................... 3-34

Configuring Traffic Prioritization ........................................................................... 3-37

Using Virtual LAN ............................................................................................................. 3-39

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

Sample Applications of VLANs using PT-7728..................................................... 3-41

Configuring Virtual LAN........................................................................................ 3-43

Using Multicast Filtering.................................................................................................... 3-44

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

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

Add Static Multicast MAC...................................................................................... 3-49

Configuring GMRP................................................................................................. 3-50

GMRP Table ........................................................................................................... 3-50

Using Bandwidth Management .......................................................................................... 3-50

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

Broadcast Storm Protection..................................................................................... 3-51

Traffic Rate Limiting Settings................................................................................. 3-51

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

Configuring Static Port Lock .................................................................................. 3-52

Configuring IEEE 802.1X....................................................................................... 3-53

Using Auto Warning........................................................................................................... 3-55

Configuring Email Warning.................................................................................... 3-56

Event Type .............................................................................................................. 3-56

Email Setup ............................................................................................................. 3-57

Configuring Relay Warning .................................................................................... 3-58

Event Setup ............................................................................................................. 3-59

Warning List............................................................................................................ 3-60

Using Line-Swap-Fast-Recovery........................................................................................ 3-60

Configuring Line-Swap Fast Recovery................................................................... 3-60

Using Set Device IP............................................................................................................ 3-60

Configuring Set Device IP ...................................................................................... 3-61

Using Diagnosis.................................................................................................................. 3-62

Mirror Port .............................................................................................................. 3-62

Ping ......................................................................................................................... 3-63

Using Monitor .................................................................................................................... 3-63

Monitor by Switch................................................................................................... 3-63

Monitor by Port ....................................................................................................... 3-64

Using the MAC Address Table........................................................................................... 3-64

Using Event Log................................................................................................................. 3-65

Using Syslog....................................................................................................................... 3-66

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

Appendix B Specifications...........................................................................................B-1

Chapter 1 Introduction

Welcome to the PowerTrans PT-7728, a managed redundant Gigabit Ethernet switch designed especially for connecting Ethernet-enabled devices for industrial field applications.

The following topics are covered in this chapter:

Overview

 

Package Checklist



Software Features

PT-7728 User’s Manual Introduction

Overview

The PowerTrans PT-7728 is certified for use in power substation automation systems (IEC 61850-3, IEEE 1613), traffic control systems (NEMA TS 2), and railway applications (EN50121-4). It can be used for Gigabit or Fast Ethernet backbones and supports redundant ring topologies. It also supports dual power inputs (24/48 VDC or 110/220 VDC/VAC) to increase the reliability of communication.

The PT-7728 has a modular design that makes network planning easy and allows greater flexibility. You can install up to 4 Gigabit Ethernet ports and 24 Fast Ethernet ports. Optional front or rear wiring makes the PT-7728 suitable for different applications.

Package Checklist

The PowerTrans PT-7728 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 PowerTrans PT-7728 y Hardware installation guide y CD-ROM with user’s manual and SNMP MIB file y Warranty statement y RJ45-to-DB9 console port cable y Protective caps for unused ports y 2 rackmount attachments

Software Features

y Turbo Ring and RSTP/STP (IEEE 802.1W/D) y IGMP snooping, GMRP to filter multicast traffic from industrial Ethernet protocols y IEEE 802.1Q VLAN, GVRP for easier network planning y QoS-IEEE 802.1p/1Q and TOS/DiffServ to increase determinism y 802.3ad, LACP for bandwidth optimization y IEEE 802.1X and https/SSL to enhance network security y SNMP V1/V2c/V3 for differential network management y RMON for efficient, proactive network monitoring y Supports ABC-01 for system configuration backup y Access restriction by MAC address y Port mirroring for online debugging y Automatic warnings by email, relay output y Automatic recovery of connected device’s IP addresses y Line-swap fast recovery y Configuration through web browser, Telnet/serial console, Windows utility, and ABC-01

1-2

Chapter 2 Getting Started

This chapter explains how the initial installation process for the PT-7728. There are three ways to access PT-7728's configuration settings: the serial console, Telnet console, and web console. If you do not know the PT-7728's IP address, you can open the serial console by connecting the PT-7728 to a PC’s COM port with a short serial cable. You can open the Telnet or web console over an Ethernet LAN or over the Internet.

The following topics are covered:

Serial Console Configuration (115200, None, 8, 1, VT100)

 

Configuration by Telnet Console



Configuration by Web Browser



Disabling Telnet and Browser Access

PT-7728 User’s Manual Getting Started

Serial Console Configuration (115200, None, 8, 1, VT100)

NOTE

y You cannot connect to the serial and Telnet console at the same time. y You can connect to the web console and another console (serial or Telnet) at the same time.

However, it is strongly recommended that you do NOT do so. Following this advice will allow you to maintain better control over the PT-7728's configuration.

We recommend using PComm Terminal Emulator when opening the serial console. This software can be downloaded free of charge from the Moxa website.

Before running PComm Terminal Emulator, use an RJ45 to DB9-F (or RJ45 to DB25-F) cable to connect the PT-7728’s 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, open the PT-7728's serial console as follows:

1. From the Windows desktop, click Start Æ Programs Æ PComm Lite 2.5 Æ Terminal

Emulator.

2. Select Open under the Port Manager menu to open a new connection.

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PT-7728 User’s Manual Getting Started

3. The Property window should open. On the Communication Parameter tab for Ports, select

the COM port that is being used for the console connection. Set the other fields as follows:

115200 for Baud Rate, 8 for Data Bits, None for Parity, and 1 for Stop Bits.

4. On the Terminal tab, select VT100 for Terminal Type. Click OK.

5. In the terminal window, the PT-7728 will prompt you to select a terminal type. Enter 1 to

select ansi/vt100 and press Enter.

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PT-7728 User’s Manual Getting Started

6. The serial console will prompt you to log in. Press Enter and select admin or user. Use the

down arrow key on your keyboard to select the Password field and enter a password if

desired. This password will be required to access any of the consoles (web, serial, Telnet). If

you do not wish to create a password, leave the Password field blank and press Enter.

7. The Main Menu of the PT-7728's serial console should appear. (In PComm Terminal

Emulator, you can adjust the font by selecting Font… in the Edit menu.)

8. Use the following keys on your keyboard to navigate the PT-7728's serial console:

Key Function

Up, down, right, left arrow keys Tab

Enter Display and select options

Space Toggle options

Esc Previous menu

Configuration by Telnet Console

You may open the PT-7728's Telnet or web console over a network. This requires that the PC host and PT-7728 are on the same logical subnet. You may need to adjust your PC host’s IP address and subnet mask. By default, the PT-7728’s IP address is 192.168.127.253 and PT-7728’s subnet mask is 255.255.0.0 (for a Class B network). This means that your PC's IP address must be set to

192.168.xxx.xxx for a subnet mask of 255.255.0.0, or to 192.168.127.xxx with a subnet mask of

255.255.255.0.

NOTE

To connect to the PT-7728’s Telnet or web console, your PC host and the PT-7728 must be on the same logical subnet.

Move the onscreen cursor

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PT-7728 User’s Manual Getting Started

NOTE

When connecting to the PT-7728's Telnet or web console, first connect one of PT-7728’s Ethernet ports to your Ethernet LAN or directly to your PC’s Ethernet port. You may use either a straight-through or cross-over Ethernet cable.

The PT-7728’s default IP address is 192.168.127.253.

After making sure that the PT-7728 is connected to the same LAN and logical subnet as your PC, open the PT-7728's Telnet console as follows:

1. Click Start Æ Run from the Windows Start menu. Telnet to the PT-7728’s IP address from

the Windows Run window. You may also issue the Telnet command from a DOS prompt.

2. In the terminal window, the Telnet console will prompt you to select a terminal type. Type 1

to choose ansi/vt100, and then press Enter.

3. The Telnet console will prompt you to log in. Press Enter and select admin or user. Use the

down arrow key on your keyboard to select the Password field and enter a password if

desired. This password will be required to access any of the consoles (web, serial, Telnet). If

you do not wish to create a password, leave the Password field blank and press Enter.

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PT-7728 User’s Manual Getting Started

4. The Main Menu of the PT-7728's Telnet console should appear.

5. In the terminal window, select Preferences… from the Terminal menu on the menu bar.

6. The Terminal Preferences window should appear. Make sure that VT100 Arrows is

checked.

NOTE

7. Use the following keys on your keyboard to navigate the PT-7728's Telnet console:

Key Function

Up, down, right, left arrow keys Tab

Enter Display and select options

Space Toggle options

Esc Previous menu

The Telnet console looks and operates in precisely the same manner as the serial console.

Move the onscreen cursor

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PT-7728 User’s Manual Getting Started

Configuration by Web Browser

The PT-7728’s web console is a convenient way to modify the configuration and access the built-in monitoring and network administration functions. You can open the PT-7728's web console using a standard web browser such as Internet Explorer or Netscape.

NOTE

To connect to the PT-7728’s Telnet or web console, your PC host and the PT-7728 must be on the same logical subnet.

If the PT-7728 is configured for other VLAN settings, you must make sure your PC host is on the management VLAN.

The PT-7728’s default IP address is 192.168.127.253.

After making sure that the PT-7728 is connected to the same LAN and logical subnet as your PC, open the PT-7728's web console as follows:

1. Point your web browser to the PT-7728’s IP address by entering it in the Address or URL

field.

NOTE

2. The PT-7728's web console will open, and you will be prompted to log in. Select the login

account (admin or user) and enter the Password. This password will be required to access any

of the consoles (web, serial, Telnet). If you do not wish to create a password, leave the

Password field blank and press Enter.

By default, no password is assigned to the PT-7728's web, serial, and Telnet consoles.

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PT-7728 User’s Manual Getting Started

3. After logging in, you may need to wait a few moments for the web console to appear. Use the

folders in the left navigation panel to navigate between different pages of configuration options.

Disabling Telnet and Browser Access

If you are connecting the PT-7728 to a public network but do not intend to manage it over the network, we suggest disabling both the Telnet and web consoles. This is done through the serial

console, by navigating to System Identification under Basic Settings. Disable or enable the Telnet Console and Web Configuration as shown below:

2-8

Chapter 3 Featured Functions

This chapter explains how to access PT-7728’s various configuration, monitoring, and administration functions. These functions can be accessed by serial, Telnet, or web console. The serial console can be used if you do not know PT-7728’s IP address and requires that you connect the PT-7728 to a PC COM port. The Telnet and web consoles can be opened over an Ethernet LAN or the Internet.

The web console is the most user-friendly way to configure PT-7728. 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:

Configuring Basic Settings



Using Port Trunking



Configuring SNMP



Using Communication Redundancy



Using Traffic Prioritization



Using Virtual LAN



Using Multicast Filtering



Using Bandwidth Management



Using Port Access Control



Using Auto Warning



Using Line-Swap-Fast-Recovery



Using Set Device IP



Using Diagnosis



Using Monitor



Using the MAC Address Table



Using Event Log



Using Syslog



PT-7728 User’s Manual Featured Functions

Configuring Basic Settings

Basic Settings includes the most common settings required by administrators to maintain and control the PT-7728.

System Identification

System Identification items are displayed at the top of the web console and will be included in alarm emails. You can set the System Identification items to make it easier to identify different switches that are connected to your network.

Switch Name

Setting Description Factory Default

Max. 30 characters

This option is useful for differentiating between the roles or applications of different units. Example: Factory Switch 1.

Managed Redundant Switch

[Serial no. of this switch]

Switch Location

Setting Description Factory Default

Max. 80 characters

Switch Description

Setting Description Factory Default

Max. 30 characters

Maintainer Contact Info

Setting Description Factory Default

Max. 30 characters

This option is useful for differentiating between the locations of different units. Example: production line 1.

This option is useful for recording a more detailed description of the unit.

This option is useful for providing information about who is responsible for maintaining this unit and how to contact this person.

Switch Location

None

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PT-7728 User’s Manual Featured Functions

Password

The PT-7728 provides two levels of configuration access. The admin account has read/write access of all configuration parameters, and the user account has read access only. The user

account can only view the configuration, but will not be able to make modifications.

ATTENTION

By default, no password is assigned to the PT-7728’s web, Telnet, and serial consoles. If a password is assigned, you will be required to enter the password when you open the serial console, Telnet console, or Web console.

Account

Setting Description Factory Default

Admin This account can modify the PT-7728's

configuration.

User This account can only view the PT-7728's

configurations.

Password

Setting Description Factory Default

Old password (max. 16 characters)

New password (Max. 16 characters)

Retype password (Max. 16 characters)

Enter the current password None

Enter the desired new password. Leave it blank if you want to remove the password.

Enter the desired new password again. Leave it blank if you want to remove the password.

admin

None

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PT-7728 User’s Manual Featured Functions

Accessible IP

The PT-7728 uses an IP address-based filtering method to control access.

You may add or remove IP addresses to limit access to the PT-7728. When the accessible IP list is enabled, only addresses on the list will be allowed access to the PT-7728. Each IP address and netmask entry can be tailored for different situations:

y Grant access to one host with a specific IP address

For example, enter IP address 192.168.1.1 with netmask 255.255.255.255 to allow access to

192.168.1.1 only.

y Grant access to any host on a specific subnetwork

For example, enter IP address 192.168.1.0 with netmask 255.255.255.0 to allow access to all IPs on the subnet defined by this IP address/subnet mask combination.

y Grant acces to all hosts

Make sure the accessible IP list is not enabled. Remove the checkmark from Enable the accessible IP list.

The following table shows additional configuration examples:

Hosts That Need Access 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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PT-7728 User’s Manual Featured Functions

Port

Port settings are included to give the user control over port access, port transmission speed, flow

control, and port type (MDI or MDIX).

Enable

Setting Description Factory Default

Checked This allows data transmission through the port.

Unchecked This 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 This displays the media type for each module’s

port

Name

Setting Description Factory Default

Max. 63 characters This specifies an alias for the port to help

administrators differentiate between different ports. Example: PLC 1

N/A

None

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PT-7728 User’s Manual Featured Functions

Speed

Setting Description Factory Default

Auto This 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

FDX Flow Ctrl

This setting enables or disables flow control for the port when the port's Speed is set to Auto. The final result will be determined by the Auto process between the PT-7728 and connected devices.

Setting Description Factory Default

Enable This enables flow control for this port when the

Disable This disables flow control for this port when the

Choose one of these fixed speed options if the connected Ethernet device has trouble auto-negotiating for line speed.

port's Speed is set to Auto.

Auto

Disable

Network

MDI/MDIX

Setting Description Factory Default

Auto This allows the port to auto-detect the port type of

the connected Ethernet device and change the port type accordingly.

MDI

MDIX

Network settings allow users to modify the usual TCP/IP network parameters.

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

Auto

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PT-7728 User’s Manual Featured Functions

Auto IP Configuration

Setting Description Factory Default

Disable Select this to set the PT-7728’s IP address

manually.

By DHCP The PT-7728’s IP address will be assigned

automatically by the network’s DHCP server.

By BootP The PT-7728’s IP address will be assigned

automatically by the network’s BootP server.

Switch IP Address

Setting Description Factory Default

IP address for the PT-7728 This assigns the PT-7728's IP address on a

TCP/IP network.

Switch Subnet Mask

Setting Description Factory Default

Subnet mask for the PT-7728

This identifies the type of network to which the PT-7728 is connected (e.g., 255.255.0.0 for a Class B network, or 255.255.255.0 for a Class C network).

Disable

192.168.127.253

255.255.255.0

Default Gateway

Setting Description Factory Default

IP address for gateway This specifies the IP address of the router that

connects the LAN to an outside network.

DNS IP Address

Setting Description Factory Default

IP address for DNS server This specifies the IP address of the DNS server

used by your network. After specifying the DNS server’s IP address, you can use the

www.PT.company.com)

IP address for 2nd DNS server

PT-7728’s URL (e.g., to open the web console instead of entering the IP address.

This specifies the IP address of the secondary DNS server used by your network. The PT-7728 will use the secondary DNS server if the first DNS server fails to connect.

None

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PT-7728 User’s Manual Featured Functions

Time

The PT-7728 has a time calibration function based on information from an NTP server or user

specified time and date. Functions such as automatic warning emails can therefore include time

and date stamp.

NOTE

The PT-7728 does not have a real time clock. The user must update the Current Time and Current Date to set the initial time for PT-7728 after each reboot, especially when there is no

NTP server on the LAN or Internet connection.

Current Time

Setting Description Factory Default

User-specified time This allows configuration of the local time in

Current Date

Setting Description Factory Default

User-specified date This allows configuration of the local date in

Daylight Saving Time

The Daylight Saving Time settings are used to automatically offset the PT-7728's time forward according to national standards.

Start Date

Setting Description Factory Default

User-specified date This specifies the date that Daylight Savings

00h:00m:00s

local 24-hour format.

1970/01/01

yyyy-mm-dd format.

None

Time begins.

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PT-7728 User’s Manual Featured Functions

End Date

Setting Description Factory Default

User-specified date This specifies the date that Daylight Savings

Time ends.

Offset

Setting Description Factory Default

User-specified hour This specifies the number of hours that the time

should be offset forward during Daylight Savings Time.

System Up Time

This indicates how long the PT-7728 remained up since the last cold start. The up time is indicated in seconds.

Time Zone

Setting Description Factory Default

Time zone This specifies the time zone, which is used to

determine the local time offset from GMT (Greenwich Mean Time).

None

GMT (Greenwich Mean Time)

NOTE

Changing the time zone will automatically correct the current time. Make sure to set the time zone before setting the time.

Time Server IP/Name

Setting Description Factory Default

IP address or name of time server

IP address or name of secondary time server

Time Server Query Period

Setting Description Factory Default

Query period This parameter determines how frequently the

This is the IP or domain address (e.g.,

192.168.1.1, time.stdtime.gov.tw, or time.nist.gov).

The PT-7728 will try to locate the secondary NTP server if the first NTP server fails to connect.

time is updated from the NTP server.

System File Update—By Remote TFTP

The PT-7728 supports saving your configuration or log file to a remote TFTP server or local host. Other PT-7728 switches can also load the configuration at a later time. The PT-7728 also supports loading firmware or configuration files from the TFTP server or a local host.

None

600 seconds

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PT-7728 User’s Manual Featured Functions

TFTP Server IP/Name

Setting Description Factory Default

IP address of TFTP server

Configuration Files Path and Name

Setting Description Factory Default

Max. 40 characters This specifies the path and file name of the

This specifies the IP address or name of the remote TFTP server. This must be specified before downloading or uploading files.

PT-7728’s configuration file on the TFTP server.

None

Firmware Files Path and Name

Setting Description Factory Default

Max. 40 characters This specifies the path and file name of the

PT-7728’s firmware file.

Log Files Path and Name

Setting Description Factory Default

Max. 40 characters This specifies the path and file name of the

PT-7728’s log file.

After setting the desired paths and file names, click Activate to save the setting. Click Download to download the prepared file from the remote TFTP server, or click Upload to upload the desired

file to the remote TFTP server.

None

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PT-7728 User’s Manual Featured Functions

System File Update—By Local Import/Export

Configuration File

Click Export to save the PT-7728's configuration file to the local host.

Log File

Click Export to save the PT-7728's log file 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 the Export button to save the file.

Upgrade Firmware

To import a new firmware file onto the PT-7728, click Browse to select the firmware file that is saved on your computer. The upgrade procedure will proceed automatically after clicking Import.

Upload Configure Data

To import a configuration file onto the PT-7728, click Browse to select the configuration file

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

Import.

Factory Default

This function provides users with a quick way of restoring the PT-7728’s configuration to factory defaults. This function is available in the serial, Telnet, and web consoles.

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PT-7728 User’s Manual Featured Functions

NOTE

After restoring the factory default configuration, you will need to use the default network settings to re-establish the web or Telnet console connection with the PT-7728.

Using Port Trunking

Link aggregation involves grouping links to into a link aggregation group. A MAC client can treat link aggregation groups as if they were a single link.

The PT-7728’s port trunking feature allows devices to communicate by aggregating up to 4 trunk groups, with a maximum of 8 ports for each group. If one of the 8 ports fails, the other seven ports will automatically provide backup and share the traffic.

Port trunking can be used to combine up to 8 ports between two PT-7728 switches. If all ports on both switch units are configured as 100BaseTX and they are operating in full duplex, the potential bandwidth of the connection will be 1600 Mbps.

The Port Trunking Concept

Moxa has developed a proprietary port trunking protocol that provides the following benefits:

y More flexibility in setting up your network connections, since the bandwidth of a link can be

doubled, tripled, or quadrupled

y Redundancy — if one link is broken, the remaining trunked ports share the traffic within this

trunk group

y Load sharing — MAC client traffic may be distributed across multiple links

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.

If all ports on both switch units are configured as 100BaseTX and they are operating in full duplex mode, the potential bandwidth of the connection will be up to 1.6 Gbps. This means that users can double, triple, or quadruple the bandwidth of the connection by port trunking between two PT series switches.

Each PT-7728 can set a maximum of 4 port trunking groups. When you activate port trunking, certain settings on each port will be reset to factory default values or disabled:

y Communication redundancy will be reset y 802.1Q VLAN will be reset y Multicast Filtering will be reset y Port Lock will be reset and disabled. y Set Device IP will be reset y Mirror will be reset

After port trunking has been activated, you may configure these items again for each trunking ports.

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Configuring Port Trunking

The Port Trunking Settings page is where ports are assigned to a trunk group.

Step 1: Select the desired Trunk Group (Trk1, Trk2, Trk3, Trk4). Step 2: Select the Trunk Type (Static or LACP). Step 3: Select the desired ports under Available Ports and click Up to add to the Trunk Group. Step 4: Select the desired ports under Member Ports and click Down to remove from the group.

Trunk Group (Maximum of 4 trunk groups)

Setting Description Factory Default

Trk1, Trk2, Trk3, Trk4 This specifies the current trunk group. Trk1

Trunk Type

Setting Description Factory Default

Static This selects Moxa's proprietary trunking protocol. Static

LACP

Available Ports/Member Ports

Setting Description Factory Default

Member/available ports This lists the ports in the current trunk group and the

Check box This selects the port to be added or removed from

Port This is how each port is identified. N/A

Port description This displays the media type for each port. N/A

Name This displays the specified name for each port. N/A

Speed

FDX flow control

Down

This selects LACP (IEEE 802.3ad, Link Aggregation Control Protocol).

ports that are available to be added.

the group.

This indicates the transmission speed for each port (100M-Full, 100M-Half, 10M-Full, or 10M-Half).

This indicates if the FDX flow control of this port is enabled or disabled.

This is used to add selected ports into the trunk group from available ports.

This is used to remove selected ports from the trunk group.

Static

N/A

Unchecked

N/A

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