3Com LANplex 6000 Installation Manual - User Manual

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OKEN

ING

WITCHING

ODULE

NSTALLATION

UIDE

For the LANplex 6000

About This Guide

This guide includes:

■

An inventory of items shipped with your LANplex 6000 module

■

An overview of the Token Ring Switching Module (TRSM)

■

Instructions for installing and replacing TRSM

■

A description of the TRSM’s components, including media options and
diagnostic LEDs

■

Pin-out information for the TRSM

Information on installing modules is also included in the

LANplex 6000

Getting Started

guide.

NOTE:

Prior to installing the TRSM module, LANplex system software revision

6.0 or later must be installed.

CAUTION:

In order to run software revision 5.0 or later on the LANplex 6000

you must have the new LMM Plus installed in your system. To verify if you
have an LMM Plus installed check the module’s ejector tab to ensure it says

LMM+

Audience

This guide is intended for trained technical personnel only.

Taking Inventory

Your package should contain the following items.

■

1 LANplex 6000 TRSM

■

LANplex 6000 Software Release Notes

■

1 disposable electrostatic discharge (ESD) wrist strap

■

Operational diskette(s) (UNIX and DOS)

■

MIB diskette(s) (UNIX and DOS)

Contact 3Com Customer Service Organization at 1-800-876-3266, option 2,
if any item is missing.

TRSM Description

TRSM Description

The Token Ring Switching Module (TRSM) is designed to add Token Ring
(TR) switching functionality to the LANplex 6000, providing the most cost
effective solution for introducing segmentation for today's Token Ring
networks, while allowing you to prepare for future higher bandwidth
requirements such as multimedia applications.

The TRSM has eight shielded RJ-45 token ring ports on the front of the
module and one FDDI backplane attachment which may be connected to
any of the three LANplex chassis FDDI backplanes. All eight token ring
switch ports support a full ring of 260 stations, with two of the ports able to
accommodate direct station attachment for dedicated bandwidth to file
servers and other critical resources. The shielded RJ-45 ports allow for
attachment via Type 1 STP or Type 3, 4, or 5 UTP copper cable. Each port is
independently configurable to support either 4 Mbps or 16 Mbps operation.

TRSM Configurable

Bridge Modes

The TRSM is architected to support both source routed or transparent
traffic types in the following modes:

■

Transparent (T)

■

Source Routing (SR)

■

Source Routing-Transparent Bridge (SRT)

Transparent

The TRSM fully complies with the IEEE 802.1d bridging standard, which
means that the module:

■

Learns source addresses from packets transmitted by stations on LANs
attached to TRSM ports

■

Ages addresses of stations on attached LANs that have not transmitted a
packet for a prolonged time

■

Stores and forwards packets from one attached LAN to another

■

Uses the Spanning Tree protocol for loop detection

The TRSM automatically “learns” the MAC-layer addresses of the stations on
its attached networks, and then forwards packets to their appropriate
destinations. Packet forwarding is based on learned or statically configured
MAC addresses. The TRSM can learn up to 8192K addresses. Additional
addresses are learned as addresses are aged out. All addresses are stored in

TRSM Description

nonvolatile RAM so they will survive a power loss or system initialization.
Source Routed traffic is not forwarded while in this mode.

Source Routing (SR)

In Source Routing (SR), the packet contains information in the Route
Information Field (RIF), which specifies the route the packet should follow in
order to reach its destination. Through the process of route discovery, the
packet determines various routes available and embeds this information as
Ring Numbers and Bridge Numbers within the RIF. The bridge compares the
RIF to its configured Bridge Numbers and Ring Numbers for each port and
forwards the packet if appropriate. The TRSM utilizes one hop between any
two ports on the module.

For Spanning Tree, the network mesh topology is reduced to a single path
utilizing IEEE 802.1d Spanning Tree.

Transparent traffic is not forwarded while in this mode.

Source Routing Transparent (SRT)

The Source Routing-Transparent (SRT) operation complies with the 802.1d
standard which provides bridging for both Source Routing and non-Source
Routing protocols. It uses the Route Information Indicator to differentiate
between SR and non-SR packets and applies the appropriate bridging
method on each packet received.

To configure the Bridging mode, see Chapter 11:

Administering the Bridge

the

LANplex 6000 Administration Console User Guide

TRSM Configurable

Protocol Translation

Modes

Protocol addresses on Token Ring are defined in non-canonical format while
FDDI is defined in canonical format. For a workstation on Token Ring to
communicate with a server on FDDI, it is necessary to reformat or translate
these embedded protocol address. The TRSM supports translation between
Token Ring and FDDI for the following protocols: IP, IPX, NetBIOS, and SNA.

Translation is not necessary if FDDI is only used as a transport media
between TRSMs. Since this feature may degrade performance, it is
recommended that you disable the translation feature when FDDI is used
solely as a transport media.

TRSM Installation

TRSM Installation

This section describes the following:

■

Module safety information

■

Installation information

■

LED activity during installation

■

Pin-out information

Information on installing modules is also included in the

LANplex 6000

Getting Started

guide.

Safety Information

Electrostatic discharge (ESD) damage

occurs when the module is improperly

handled. ESD can damage components on a module, causing complete or
intermittent failures.

To prevent ESD-related damage, handle the module in the following
manner:

■

Always wear the ESD wrist strap provided with the module, ensuring that it
makes good skin contact and that the alligator clip is connected to a
suitable ground. See Figure 3

on page 7.

■

Keep the module in its antistatic shielded bag until you are ready to
install it.

■

Do not touch the components, pins, leads, or solder connections.

■

Always handle the module by its edges.

Additionally, you should cover every empty slot with a blank faceplate to
protect the system from dust or other foreign substances, and to ensure
proper system cooling.

Prior to Installation

Before you install your new module, follow the appropriate pre-installation
instructions below:

Read if installing in

an empty slot

Your LANplex system is shipped with no modules installed and with
protective faceplates covering the installation slots. Initial installation
requires that you remove the protective faceplate covering the selected
installation slot prior to installing the option module.

TRSM Installation

To remove the faceplate:

Unscrew the securing screws on the module’s faceplate. See Figure 1.

Figure 1

LANplex 6004 with Blank Faceplates

Pull the faceplate away from the system.

Read if replacing

a TRSM

You can replace a module while the system is powered on. Replacing the
module requires that you remove the attached cables from the module’s
ports prior to installing the new module.

NOTE:

Ensure that there is a record of where the cables are attached so that

you can correctly re-connect them to the new module.

CAUTION:

Inserting and extracting a TRSM erases all information stored in

NVRAM on the TRSM. Before removing the installed TRSM, save all
nonvolatile data using the NV data save functionality on the system’s
Administration Console. This information can be restored using the NV
restore functionality. See the LANplex 6000 Administration Console User
Guide for information on saving, restoring, and resetting nonvolatile data.
Inserting and extracting a module will cause a warm system reboot.

To remove a module:

Discharge yourself of static electricity by placing the ESD wrist strap on your
wrist and clipping the alligator clip to the mounting screw located next to
the black ground symbol on the system’s right mounting bracket. See
Figure 3. If your system does not have mounting brackets, touch the rear
panel.

Disconnect the cables from the module’s ports.

Unscrew the securing screws on the module’s faceplate. See Figure 1.

Blank faceplates

LMM+ in slot 1

Captive screws

Blank faceplates

LMM+ in slot 1

Captive screws

TRSM Installation

Grasp the inject/eject handles of the module and push them outward as
shown in Figure 2.

Figure 2

Handles in Outward Position

Remove the module from the system.

Place the module in its antistatic bag.

Installing the TRSM

The installation procedure takes only a few minutes to complete. You need
a small, flat-blade screwdriver.

NOTE:

Only the LMM may be inserted in slot one of the LANplex system. The

system will not operate if any other module is inserted into slot one. Slot one
of the LANplex 6004 is the bottom slot, and slot one of the LANplex 6012 is
the first slot on the left.

To install the TRSM in an empty slot in the LANplex system, perform the
following steps:

Module faceplate

TRSM Installation

Figure 3

Ground Symbol for Static Discharge

Remove the TRSM from its antistatic bag.

Make sure that the inject handles are in the outward position. See Figure 4.

Figure 4

Handles in Outward Position

Orient the TRSM to insert it into the LANplex system. For a LANplex 6012
system, orient the module so that its labeling is upright. For a LANplex 6004
system, the module’s labeling should be on your left.

A/M

B/M

Ground symbol

Mounting
screw hole

Module faceplate

TRSM Installation

WARNING:

If the system is powered on when you are installing a module,

do not insert any metal objects, such as a screwdriver or a finger with
jewelry, in the open slot. This could cause burns or other bodily harm, as well
as system damage.

Direct the module into the chassis by placing it between the guides of the
selected slot and sliding the module until it stops. The module stops sliding
when the inject handles make contact with the front of the chassis.

Figure 5 shows a TRSM being installed in a 6012 system. Figure 6 shows a
TRSM being installed in a 6004 system.

Figure 5

Guiding an TRSM Module into a LANplex 6012

LANplex 6012

LMM in slot 1

Err

Run

Ethernet

Serial
Ports

A/M

B/M

2
3

INS

4
5

Port Status

Temp

Pwr/Unseat

Optical
Bypass

LMM

TRSM

Pwr/Unseat

Err

TRSM

1
2
3

5
6
7

1
2
3

5
6
7

TRSM Installation

Figure 6

Guiding an TRSM Module into a LANplex 6004

Inject the TRSM into the chassis.

■

If the system is powered on, when the

Power/Unseat

LED on the

panel’s faceplate is yellow, inject the TRSM into the chassis by grabbing
both ejector/injector handles and simultaneously push them inward. See
Figure 7.

■

If the system is not powered on, once you feel a slight resistance, inject
the TRSM into the chassis.

Relocate the inject handles back to their center position by gently pushing
them inward. See Figure 7.

This locks the TRSM into the chassis. The

Power/Unseat

LED lights green

when the TRSM is seated.

LMM in slot 1

TRSM

TRSM Installation

Figure 7

Handles in Inward (Inject) Position

NOTE:

Do not push the handles outside the center position or you will eject

the module. These handles act as “ejectors” when pushed outward and
“injectors” when pushed inward.

See the following section on “LED Activity” to verify that the TRSM has been
properly installed.

Tighten the TRSM’s securing screws using a flat-blade screwdriver.

Module faceplate

TRSM Installation

LED Activity

If the system is powered on, you can verify that your module is properly
installed by observing its LEDs. Follow the troubleshooting suggestions
below if LED activity is not normal.

Normal LED Activity

The following LED activity is normal during installation:

■

The

Power/Unseat

LED lights yellow briefly when the module is inserted far

enough into the chassis to use the inject/eject handles.

■

The

Err

LED lights yellow temporarily after insertion while the module runs

diagnostics.

■

The

Power/Unseat

LED lights green, indicating that the module is

powered on.

Once you have completed the installation procedure, only the green

Power/Unseat

LED should remain lit.

Troubleshooting

If LED activity is not normal, check the troubleshooting suggestions
listed below.

■

If the

Power/Unseat

LED remains yellow, the module is not fully seated in

the chassis. Eject and re-insert the module as described in the installation
procedure starting on page 6.

■

If the

Err

LED remains yellow, contact 3Com Technical Support for additional

assistance.

■

If the

Power/Unseat

LED does not light green when the module is

powered on, contact 3Com Technical Support for assistance.

NOTE:

For 3Com Technical Support information, see Appendix B: Technical

Support in the LANplex 6000 Getting Started guide.

TRSM Components

TRSM
Components

The main components of the TRSM include board status LEDs, eight port
status LEDs, eight port speed LEDs, two port mode LEDs, and eight Token
Ring shielded RJ-45 connectors. Figure 8 shows the front panel of the TRSM.

Figure 8

TRSM Option Module

Ports 5-8

Ports 1-4

Pwr/Unseat

Err

Port Status

Module status LEDs

Securing screw

Inject/eject handle

Inject/eject handle
Securing screw

TRSM

1
2
3

5
6
7

Port Speed

Hub Port

1
2
3

5
6
7

Port status LEDs

Port speed LEDs

Port mode LEDs

Ports 1 and 2
Station/lobe switchable ports

TRSM Components

Status LEDs

Each TRSM contains two

Module Status

LEDs and eight

Port Status

LEDs.

Depending on the condition, each LED is either green or yellow. Table 1
describes these LEDs.

Table 1

FDDI/Ethernet Switching Module LEDs

LEDs

Name

Color

Description

Module
Status

Pwr/Unseat

Green

Yellow

Indicates that the module is powered on

Indicates that the module is not fully
plugged into the backplane

Err

(Error)

Yellow

Indicates either that an error has
occurred or that the module has failed a
diagnostic procedure

Port
Status

Port Status

1 - 8

Port Speed

1 - 8

Port Mode

1 - 2

Green

Yellow

Green

Yellow

Green

Indicates that the associated port is active

Indicates that an error condition has
occurred with the associated port or that
the port is disabled

Indicates that the port is running at
16Mbps

Indicates that the port is running at
4Mbps

Indicates that the ports are configured as
lobes and can accept an external station
connection

Indicates that a station is attached to the
lobe port

Pin Assignments

Pin Assignments

Table 2 provides the pin assignments for the TRSM’s eight (RJ-45) ports in
station mode. Table 3 provides the pin assignments for ports 1 and 2 when
configured as lobes.

Table 2

Station Mode TRSM (RJ-45) Pin Assignments

Pin No.

Signal

Description

Not used

TX-

Transmit-

RX+

Receive+

RX-

Receive-

TX+

Transmit+

Not used

Table 3

Lobe Mode TRSM (RJ-45) Pin Assignments

Pin No.

Signal

Description

Not used

RX-

Receive-

TX+

Transmit+

TX-

Transmit-

RX+

Receive+

Not used

Documentation Comments

Documentation
Comments

Your suggestions are very important to us and will help make LANplex
documentation more useful to you. Please email comments about this
guide to

: sdtechpubs_comments@3Mail.3Com.com

Please include the following information when commenting:

■

Document title

■

Document part number (listed on back cover of document)

■

Page number (if appropriate)

Example:

■

LANplex 6000 Planning Your Site

■

Part No. 801-00251-000

■

Page 2-5 (chapter 2, page 5)

3Com Corporation
5400 Bayfront Pla a
Santa Clara, California

5052- 154

© 3Com Corporation, 1995. All rights reserved. No part of this documentation may be reproduced in any form
or by any means or used to make any derivative work (such as translation, transformation, or adaptation)
without permission from 3Com Corporation.

3Com Corporation reserves the right to revise this documentation and to make changes in content from time
to time without obligation on the part of 3Com Corporation to provide notification of such revision or change.

3Com Corporation provides this documentation without warranty of any kind, either implied or expressed,
including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose.
3Com may make improvements or changes in the product(s) and/or the program(s) described in this
documentation at any time.

3Com and LANplex are registered trademarks of 3Com Corporation. 3Com registered trademarks are registered
in the United States, and may or may not be registered in other countries. Other brand and product names may
be registered trademarks or trademarks of their respective holders.

Part No. 801-00194-000
Published December 1995
Revision 01

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