3Com CoreBuilder 9000 User manual

20-Port 100BASE-FX (MT-RJ)
Fast Ethernet Layer 2
Switching Module
Quick Start Guide
For the CoreBuilder®9000 Enterprise Switch
Switching Module
Description
This guide describes key installation information for the
CoreBuilder®9000 Fast Ethernet (FEN) 20-port Layer 2 fiber-optic
switching module:
The 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module
(Model Number 3CB9LF20MM) has twenty 100 Mbps Ethernet
fiber-optic ports with MT-RJ connectors on its front panel and two
1-Gigabit ports for connection to the chassis backplane. It operates as a
Layer 2 switch and occupies a single interface module slot in the
CoreBuilder 9000 7-slot chassis, 8-slot chassis, and 16-slot chassis.
Key Features The 20-port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module
supports the following key features:
■Management using the CoreBuilder 9000 Administration Console (a
command line interface), the Web Management suite of applications,
or Simple Network Management Protocol (SNMP)-based applications
■Module installation or removal while the chassis is powered on
(known as hot-swapping)
For information about the software features that this module supports,
see the:
■CoreBuilder 9000 Implementation Guide
■Command Reference Guide
■CoreBuilder 9000 Release Notes for Fast Ethernet and Gigabit
Ethernet Layer 2 Switching Modules

220-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module Quick Start Guide
Figure 1 shows the components on the front panel of the module. The
front panel ports on the module are numbered 1 through 20. The two
1-Gigabit ports on the back of the module are numbered 21 and 22.
Figure 1 Front Panel of the 100BASE-FX (MT-RJ) FEN Module
In the 7-slot chassis, you install modules horizontally with the LEDs to the
left. In the 8-slot chassis and 16-slot chassis, you install modules vertically
with the LEDs at the top.
Audience Description This guide is intended for trained technical personnel only. Do not
attempt to install, remove, or replace CoreBuilder 9000 Fast Ethernet
Switching Modules if you have not had the proper training from 3Com.
For training information in the United States and Canada, call
1-800-NET-3COM. For training information in other countries, visit the
3Com Web site:
http://www.3com.com
Safety Precautions When you handle components in a CoreBuilder 9000 system, be sure
that you follow all safety precautions. To avoid electric shocks, burns, or
equipment damage, read and follow these warnings:
WARNING: Allow only trained service personnel to install, remove, or
replace a FEN Switching Module.
3CB9LF20R
1
MOD STAT
23456
714
1X
2X
3X
4X
5X
6X
7X
8X
9X
10X
11X
12X
13X
14X
15X
16X
17X
18X
19X
20X
3CB9LF20MM
1
MOD STAT
23456
714
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Model number
Ejector handle
Module Status LED
Port Status LEDs
MT-RJ ports
Ejector handle
100BASE-FX

20-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module Quick Start Guide 3
WARNING: Hazardous energy exists within the system. Use extreme
caution when you install, remove, or replace any module when the
system is on:
■Never insert metal objects such as a screwdriver or a finger with
jewelry into open module slots.
■Do not touch any connections within the chassis with your hands or
fingers.
WARNING: To ensure optical safety when installing the 20-port
100BASE-FX (MT-RJ) FEN Switching Module, comply with the following
precaution:
The fiber optic lasers used in these modules meet the regulatory
requirements for casual exposure to the eye. As with any source of bright
light, however, 3Com recommends that you do not look into the laser
light source.
IEC 825, Class 1 Laser Devices are for connection only to Class 1 Laser
Devices. MMF and SMF fiber optic interfaces use lasers.
ESD Safety Information
Electrostatic discharge (ESD) can damage components of the module.
ESD, which occurs when the module is improperly handled, can cause
complete or intermittent failures.
CAUTION: To prevent ESD-related damage:
■Always wear an ESD wrist strap (not provided) when you handle a
module, ensuring that the strap makes good skin contact and is
properly grounded.
■Keep the module in its antistatic bag until you are ready to install it.
CLASS 1
LASER PRODUCT

420-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module Quick Start Guide
Handling Precautions When you handle the 100BASE-FX (MT-RJ) Fast Ethernet Layer 2
Switching Module, follow these precautions:
■Always handle the module by the front panel only.
■Do not touch the components, pins, leads, or solder connections.
■Do not twist or otherwise force the module into the chassis when you
insert it into the module guides.
■Before you push the module into the chassis, make sure that the
module ejector handles are open.
■When you slide the module into the 7-slot chassis, match the left and
right module guides. When you slide the module into the 8-slot
chassis, match the upper and lower module guides.
Unpacking
Instructions
Use the following procedure when you unpack the module:
1Verify that the module is the correct model by matching the 3C number
that is listed on the shipping box label to the 3C number that is listed on
your order documentation (3CB9LF20MM).
2Remove the module, in its antistatic bag, from the shipping box.
3Remove the module from its antistatic bag and inspect it for physical
damage.
CAUTION: Handle the module by the front panel only. Do not touch any
components, pins, leads, or solder connections.
If the module appears to be damaged, replace it in its antistatic bag and
shipping box, and contact your supplier.
4Ensure that the box also contains:
■CoreBuilder 9000 Release Notes for Fast Ethernet and Gigabit
Ethernet Layer 2 Switching Modules
■20-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module
Quick Start Guide for the CoreBuilder 9000 Enterprise Switch (this
guide)
If the listed contents are not included in your shipping box, contact your
supplier.
All shipping boxes are reusable. After you remove the contents, replace
the packing materials in the box and store it for future use.

20-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module Quick Start Guide 5
Installation
Prerequisites
Before you install your 20-port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2
Switching Module, comply with the following prerequisites:
■Verify that the chassis is properly installed in a rack, on a table, or on a
shelf, according to the instructions in either of these guides:
■7-Slot Chassis Quick Installation Guide for the CoreBuilder 9000
Enterprise Switch
■Chassis Quick Installation Guide for the CoreBuilder 9000
Enterprise Switch 8-slot Chassis and 16-slot Chassis
■Have a flat-blade torque screwdriver available to secure the module to
the chassis after you install it.
■Read the CoreBuilder 9000 Release Notes for Fast Ethernet and
Gigabit Ethernet Layer 2 Switching Modules that is included in your
module shipping box for important upgrade procedures for other
modules in an existing chassis or in a new chassis.
CAUTION: All modules in a CoreBuilder 9000 chassis must operate at
compatible software levels. You must verify the software release on all
new and existing modules in your chassis and upgrade as necessary. See
the CoreBuilder 9000 Release Notes for Fast Ethernet and Gigabit
Ethernet Layer 2 Switching Modules for a module software compatibility
requirements table, mandatory upgrade procedures, and other important
information.

620-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module Quick Start Guide
Module Placement
in the Chassis
Note the following chassis slot restrictions and recommendations when
you choose a chassis slot for the 20-port 100BASE-FX (MT-RJ) Fast
Ethernet Switching Module:
■In the CoreBuilder 9000 7-slot chassis:
■Install a FEN Switching Module in slot 1, 2, 3, 4, 5, or 6.
■Do not install a FEN Switching Module in slot 7. This slot is reserved
for a GEN Switch Fabric Module.
■In the CoreBuilder 9000 8-slot chassis:
■Install a FEN Switching Module in slot 1, 2, 3, 4, 5, or 6.
■Do not install a FEN Switching Module in slot 7 or slot 8. These
slots are reserved for GEN Switch Fabric Modules.
■In a CoreBuilder 9000 16-slot chassis:
■To optimize backplane performance, install 20-port FEN Switching
Modules in slot 1, 2, 3, 4, 5, 6, 7, 10, 11, or 12.
■Do not install a FEN Switching Module in slot 8 or slot 9. These
slots are reserved for GEN Switch Fabric Modules.
Table 1, Table 2, and Table 3 list the relationship among the 24-port
Gigabit Ethernet (GEN) Switch Fabric Module (Model Number
3CB9FG24T), the 20-port FEN Switching Module, and the slots in the
7-slot chassis, the 8-slot chassis, and the 16-slot chassis, respectively.
Table 4 and Table 5 list the relationship between the 9-port Gigabit
Ethernet (GEN) Switch Fabric Module (Model Number 3CB9FG9) and the
the slots in the 7-slot chassis and the 8-slot chassis.
Use this information to help select a slot for your module, as well as for
administration purposes after you have completed the installation.

20-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module Quick Start Guide 7
Ta b l e 1 Mapping the 24-port Gigabit Ethernet Switch Fabric Module (SFM) and the 20-port Switching Module
to the 7-slot Chassis
Chassis Slot
No.
Number of SFM
Backplane Ports
Allocated to Slot
20-port Switching
Module Backplane
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
14; this module can
access up to 2
21
22
1
2
1
2
24; this module can
access up to 2
21
22
5
6
3
4
34; this module can
access up to 2
21
22
9
10
5
6
44; this module can
access up to 2
21
22
13
14
7
8
54; this module can
access up to 2
21
22
17
18
9
10
64; this module can
access up to 2
21
22
21
22
11
12
7Reserved for an SFM Not applicable Not applicable Not applicable

820-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module Quick Start Guide
Ta b l e 2 Mapping the 24-port Gigabit Ethernet Switch Fabric Module (SFM) and the 20-port Switching Module
to the 8-slot Chassis
Chassis Slot
No.
Number of SFM
Backplane Ports
Allocated to Slot
20-port Switching
Module Backplane
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
14; this module can
access up to 2
21
22
1
2
1
2
24; this module can
access up to 2
21
22
5
6
3
4
34; this module can
access up to 2
21
22
9
10
5
6
44; this module can
access up to 2
21
22
13
14
7
8
54; this module can
access up to 2
21
22
17
18
9
10
64; this module can
access up to 2
21
22
21
22
11
12
7Reserved for an SFM Not applicable Not applicable Not applicable
8Reserved for an SFM Not applicable Not applicable Not applicable

20-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module Quick Start Guide 9
Ta b l e 3 Mapping the 24-port Gigabit Ethernet Switch Fabric Module (SFM) and the 20-port Switching Module
to the 16-slot Chassis
Chassis Slot
No.
Number of SFM
Backplane Ports
Allocated to Slot
20-port Switching
Module Backplane
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
1 2 21
22
1
2
1
2
2 2 21
22
3
4
3
4
3 2 21
22
5
6
5
6
4 2 21
22
7
8
7
8
5 2 21
22
9
10
9
10
6 2 21
22
11
12
11
12
7 2 21
22
13
14
13
14
8Reserved for an SFM Not applicable Not applicable Not applicable
9Reserved for an SFM Not applicable Not applicable Not applicable
10 221
22
15
16
15
16
11 221
22
17
18
17
18
12 221
22
19
20
19
20
13 121 21 21
14 121 22 22
15 121 23 23
16 121 24 24

10 20-Port 100BASE-FX (MT-RJ) Fast Ethernet Layer 2 Switching Module Quick Start Guide
Ta b l e 4 Mapping the 9-port GEN Switch Fabric Module (SFM) and 20-port Fast Ethernet Switch Module in the
7-slot Chassis
Chassis
Slot No.
Number of SFM
Backplane Ports
Allocated to Slot
20-port Switching
Module Backplane
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
1 1 21 1 1
2 1 21 2 2
3 1 21 3 3
4 1 21 4 4
5 1 21 55
6 1 21 6 6
7Not applicable. Switch fabric module slot only.
Ta b l e 5 Mapping the 9-port GEN Switch Fabric Module (SFM) and 20-port Fast Ethernet Switch Module in the
8-slot Chassis
Chassis
Slot No.
Number of SFM
Backplane Ports
Allocated to Slot
20-port Switching
Module Backplane
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
1 1 21 1 1
2 1 21 22
3 1 21 3 3
4 1 21 4 4
5 1 21 55
6 1 21 6 6
7Not applicable. Switch fabric module slot only.
8Not applicable. Switch fabric module slot only.