3Com LANplex 6000 Manual de usuario

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

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

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:

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.

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

Por ts

A/M

B/M

INS

Port Status

Temp

Pwr/Unseat

Optical

Bypass

LMM

TRSM

Pwr/Unseat

Err

TRSM

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

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