3Com LANplex 6000 Manuale utente
R
T
OKEN
R
ING
S
WITCHING
M
ODULE
I
NSTALLATION
G
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
■
1
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.
2
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
3
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
in
the
LANplex 6000 Administration Console User Guide
.
N
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.
4
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
5
To remove the faceplate:
1
Unscrew the securing screws on the module’s faceplate. See Figure 1.
Figure 1
LANplex 6004 with Blank Faceplates
2
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:
1
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.
2
Disconnect the cables from the module’s ports.
3
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
6
TRSM Installation
4
Grasp the inject/eject handles of the module and push them outward as
shown in Figure 2.
Figure 2
Handles in Outward Position
5
Remove the module from the system.
6
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:
1
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
Module faceplate
TRSM Installation
7
Figure 3
Ground Symbol for Static Discharge
2
Remove the TRSM from its antistatic bag.
3
Make sure that the inject handles are in the outward position. See Figure 4.
Figure 4
Handles in Outward Position
4
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.
11
12
13
14
15
16
5
6
7
8
4
6
5
4
6
5
RX
TX
RX
TX
RX
TX
RX
A/M
B/M
4
5
Ground symbol
Mounting
screw hole
Module faceplate
Module faceplate
8
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.
5
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
R
LMM in slot 1
1
Err
Run
Ethernet
Serial
Por ts
A/M
B/M
2
3
INS
4
5
Port Status
1
2
3a
3b
4
5
Temp
Pwr/Unseat
Optical
Bypass
LMM
TRSM
Pwr/Unseat
Err
1
2
3
4
5
6
7
8
TRSM
12
1
2
3
5
6
7
48
1
2
3
5
6
7
48
TRSM Installation
9
Figure 6
Guiding an TRSM Module into a LANplex 6004
6
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.
7
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
10
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.
8
See the following section on “LED Activity” to verify that the TRSM has been
properly installed.
9
Tighten the TRSM’s securing screws using a flat-blade screwdriver.
Module faceplate
Module faceplate
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