Moxa Technologies PT-7728 Series User manual

Moxa PowerTrans Switch
PT-7728 User’s Manual
www.moxa.com/product
Third Edition, February 2009
©2009 Moxa Inc. All rights reserved.
Reproduction without permission is prohibited.

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.
Copyright Notice
Copyright ©2009 Moxa Inc.
All rights reserved.
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.
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www.moxa.com/support
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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.......................................................................................... 2-5
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
IPv4 ........................................................................................................................... 3-7
IPv6 ........................................................................................................................... 3-7
Time .......................................................................................................................... 3-9
Daylight Saving Time ............................................................................................... 3-9
Configuring IEEE 1588/PTP................................................................................... 3-11
PTP Setting.............................................................................................................. 3-12
System File Update—By Remote TFTP ................................................................. 3-13
System File Update—By Local Import/Export....................................................... 3-14
Factory Default........................................................................................................ 3-15
Using Port Trunking ........................................................................................................... 3-15
The Port Trunking Concept..................................................................................... 3-15
Configuring Port Trunking...................................................................................... 3-16
Configuring SNMP............................................................................................................. 3-17
SNMP Read/Write Settings..................................................................................... 3-18
Trap Settings ........................................................................................................... 3-20
SNMP Trap Mode ................................................................................................... 3-20
SNMP Inform Mode................................................................................................ 3-21
Private MIB information ......................................................................................... 3-21
Using Communication Redundancy ................................................................................... 3-21
The Turbo Ring Concept......................................................................................... 3-22
Configuring Turbo Ring, Turbo Ring V2, and Turbo Chain................................... 3-25
The Turbo Chain Concept ....................................................................................... 3-31
Configuring “Turbo Chain”..................................................................................... 3-31
Explanation of “Current Status” Items .................................................................... 3-32
Explanation of “Settings” Items .............................................................................. 3-32
The STP/RSTP Concept.......................................................................................... 3-33
Configuring STP/RSTP........................................................................................... 3-38
Using Traffic Prioritization................................................................................................. 3-41
The Traffic Prioritization Concept .......................................................................... 3-41
Configuring Traffic Prioritization ........................................................................... 3-43
Using Virtual LAN ............................................................................................................. 3-45

The Virtual LAN (VLAN) Concept ........................................................................ 3-45
Sample Applications of VLANs using PT-7728 ..................................................... 3-48
Configuring Virtual LAN........................................................................................ 3-49
Using Multicast Filtering.................................................................................................... 3-51
The Concept of Multicast Filtering ......................................................................... 3-51
Configuring IGMP Snooping .................................................................................. 3-54
Add Static Multicast MAC...................................................................................... 3-55
Configuring GMRP ................................................................................................. 3-56
GMRP Table ........................................................................................................... 3-56
Using Bandwidth Management .......................................................................................... 3-57
Configuring Bandwidth Management ..................................................................... 3-57
Broadcast Storm Protection..................................................................................... 3-57
Traffic Rate Limiting Settings................................................................................. 3-57
Using Port Access Control.................................................................................................. 3-58
Configuring Static Port Lock .................................................................................. 3-58
Configuring IEEE 802.1X....................................................................................... 3-59
Using IP Filter .................................................................................................................... 3-61
Using Auto Warning ........................................................................................................... 3-62
Configuring Email Warning.................................................................................... 3-62
Event Type .............................................................................................................. 3-62
Email Setup ............................................................................................................. 3-64
Configuring Relay Warning .................................................................................... 3-65
Event Setup ............................................................................................................. 3-65
Warning List............................................................................................................ 3-66
Using Line-Swap-Fast-Recovery........................................................................................ 3-66
Configuring Line-Swap Fast Recovery................................................................... 3-66
Using Set Device IP............................................................................................................ 3-67
Configuring Set Device IP ...................................................................................... 3-68
Configuring DHCP Relay Agent............................................................................. 3-68
Using Diagnosis.................................................................................................................. 3-70
Mirror Port .............................................................................................................. 3-70
Ping ......................................................................................................................... 3-71
LLDP.................................................................................................................................. 3-72
Using Monitor .................................................................................................................... 3-73
Monitor by Switch................................................................................................... 3-73
Monitor by Port ....................................................................................................... 3-74
Using the MAC Address Table ........................................................................................... 3-74
Using System Log .............................................................................................................. 3-75
Event Log................................................................................................................ 3-75
Syslog...................................................................................................................... 3-76
Using HTTPS/SSL ............................................................................................................. 3-77
Appendix AMIB Groups..............................................................................................3-78
Appendix BSpecifications...........................................................................................B-1
Appendix CModbus/TCP Map .....................................................................................C-4
Modbus Information..................................................................................................C-4
Modbus Information..................................................................................................C-9
Modbus Information................................................................................................C-15
Modbus information................................................................................................192HC-21

1
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
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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.
y1 PowerTrans PT-7728
yHardware installation guide
yCD-ROM with user’s manual and SNMP MIB file
yWarranty statement
yRJ45-to-DB9 console port cable
yProtective caps for unused ports
y2 rackmount attachments
Software Features
yIPv6 Ready logo awarded (IPv6 Logo Committee certified)
yIEEE 1588 PTP (Precision Time Protocol) for precise time synchronization of networks
yTurbo Ring, Turbo Chain and RSTP/STP (IEEE 802.1W/D)
yDHCP Option 82 for IP address assignment with different policies
yIGMP snooping, GMRP to filter multicast traffic from industrial Ethernet protocols
yIEEE 802.1Q VLAN, GVRP for easier network planning
yQoS-IEEE 802.1p/1Q and TOS/DiffServ to increase determinism
y802.3ad, LACP for bandwidth optimization
yIEEE 802.1X and https/SSL to enhance network security
yModbus/TCP industrial Ethernet protocol supported
ySNMP V1/V2c/V3 for differential network management
yRMON for efficient, proactive network monitoring
ySupports ABC-01 for system configuration backup
yAccess restriction by MAC address
yPort multi-mirroring for online debugging
yAutomatic warnings by email, relay output
yAutomatic recovery of connected device’s IP addresses
yLine-swap fast recovery
yConfiguration through web browser, Telnet/serial console, Windows utility, and ABC-01

2
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
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Serial Console Configuration (115200, None, 8, 1, VT100)
NOTE yYou cannot connect to the serial and Telnet console at the same time.
yYou 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.
NOTE 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 ÆPrograms ÆPComm Lite 2.5 ÆTerminal
Emulator.
2. Select Open under the Port Manager menu to open a new connection.

PT-7728 User’s Manual Getting Started
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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, 8for Data Bits, None for Parity, and 1for 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 1to
select ansi/vt100 and press Enter.

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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 Move the onscreen cursor
Enter Display and select options
Space Toggle options
Esc Previous menu

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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 255.255.255.0 (for a Class C 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.
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.
NOTE 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 ÆRun 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.

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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.
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.
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 Move the onscreen cursor
Enter Display and select options
Space Toggle options
Esc Previous menu
NOTE The Telnet console looks and operates in precisely the same manner as the serial console.

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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.
NOTE If the PT-7728 is configured for other VLAN settings, you must make sure your PC host is on the
management VLAN.
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.
NOTE 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.
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.
NOTE By default, no password is assigned to the PT-7728's web, serial, and Telnet consoles.

PT-7728 User’s Manual Getting Started
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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:

3
3
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 IP Filter
Using Auto Warning
Using Line-Swap-Fast-Recovery
Using Set Device IP
Using Diagnosis
LLDP
Using Monitor
Using the MAC Address Table
Using System Log
Using HTTPS/SSL

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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
This option is useful for differentiating between
the locations of different units. Example:
production line 1.
Switch Location
Switch Description
Setting Description Factory Default
Max. 30
characters
This option is useful for recording a more
detailed description of the unit.
None
Maintainer Contact Info
Setting Description Factory Default
Max. 30
characters
This option is useful for providing information
about who is responsible for maintaining this
unit and how to contact this person.
None

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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. admin
User This account can only view the PT-7728's
configurations.
Password
Setting Description Factory Default
Old password
(max. 16 characters)
Enter the current password None
New password
(Max. 16 characters)
Enter the desired new password. Leave it blank if
you want to remove the password.
None
Retype password
(Max. 16 characters)
Enter the desired new password again. Leave it
blank if you want to remove the password.
None

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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:
yGrant 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.
yGrant 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.
yGrant 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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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. Enabled
Unchecked This immediately shuts off port access.
Description
Setting Description Factory Default
Media type This displays the media type for each module’s
port N/A
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
None
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.
Auto
100M-Full Choose one of these fixed speed options if the
connected Ethernet device has trouble
auto-negotiating for line speed.
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.

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Setting Description Factory Default
Enable This enables flow control for this port when the
port's Speed is set to Auto. Disable
Disable This disables flow control for this port when the
port's Speed is set to Auto.
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.
Auto
MDI Choose MDI or MDIX if the connected Ethernet
device has trouble auto-negotiating for port type.
MDIX
Network
The Network configuration allows users to configure both IPv4 and IPv6 parameters for
management access over the network. This Moxa Ethernet switch supports both IPv4 and IPv6,
and can be managed through either of these address types. An explanation of each configuration
item follows.
IPv4
The IPv4 settings include the switch’s IP address and subnet mask, as well as the IP address of the
default gateway. In addition, input cells are provided for the IP addresses of a 1st and 2nd DNS
server.
IPv6
The IPv6 setting includes two distinct address types: Link-Local Unicast address and Global
Unicast address. A Link-Local address makes the switch accessible over IPv6 for all devices
attached to the same local subnet. To connect to a larger network with multiple segments, the
switch must be configured with a Global Unicast address.