3Com 3CB9LG9MC User manual

9-Port 1000BASE-SX
Gigabit Ethernet
Layer 2 Switching Module
Quick Start Guide
For the CoreBuilder®9000 Enterprise Switch
Module Description The 9-port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module
(Model Number 3CB9LG9MC) for the CoreBuilder®9000 Enterprise
Switch can switch Gigabit Ethernet (GEN) connections to corporate
backbones and servers. The module has nine 1000BASE-SX GEN front
panel ports. It has the following number of backplane ports for
connection to the 24-port and the 9-port GEN Switch Fabric Modules:
The 9-port Gigabit Ethernet Layer 2 Switching Module (9-port GEN
Layer 2 Switching Module) includes its own embedded management
agent that supports standard Simple Network Management Protocol
(SNMP) Management Information Bases (MIBs).
Key Features The 9-port GEN Layer 2 Switching Module supports these features:
■Hot-swapping of modules
■Management using the Administration Console
(a command line interface), the Web Management suite of
applications with an Internet browser, or SNMP-based applications
Backplane Port
Connections to the
24-port GEN Switch
Fabric Module
Backplane Port
Connections to the
9-port GEN Switch
Fabric Module
7-slot Chassis 3 1
8-slot Chassis 3 1
16-slot Chassis 2NA

29-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide
For information about the software features that this module supports,
see the:
■CoreBuilder 9000 Implementation Guide
■Command Reference Guide
■CoreBuilder 9000 Release Notes for the Fast Ethernet and Gigabit
Ethernet Layer 2 Switching Modules
Front Panel Figure 1 identifies the components on the module front panel.
Figure 1 Front Panel for the 9-Port GEN Layer 2 Switching Module
In the 7-slot chassis, you install the module horizontally with the LEDs at
the left. In the 8-slot chassis and 16-slot chassis, you install the module
vertically with the LEDs at the top.
Fiber-optic ports
(SC connectors)
TX
RX
1
2
1
TX
RX
MOD STAT
2
3
4
6
7
8
9
5
TX
RX
3
TX
RX
4
TX
RX
5
TX
RX
6
7
TX
RX
TX
RX
8
TX
RX
9
Model number
Ejector handle
Module Status LED
Port Status LEDs
Ejector handle
3CB9LG9MC

9-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide 3
Audience Description This guide is intended for trained technical personnel only. Do not
attempt to install, remove, or replace the 9-port GEN Layer 2 Switching
Module 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
the number to call in other locations, visit the 3Com Web site:
www.3Com.com/support/
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 any module in the chassis.
WARNING: Hazardous energy exists within the system. Use extreme
caution when you install, remove, or replace any module in the chassis.
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 Gigabit Ethernet
Layer 2 Switching Module, comply with the following precaution:
Although the data communication LEDs used in this product meet the
regulatory requirements for casual exposure to the eye, as with any
source of bright light, it is advised that you do not look into the light
source.
LED Safety Information: IEC 825 and EN60825, Class 1 LED Device. For
connection only to Class 1 LED Device
CLASS 1
LED PRODUCT

49-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide
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.
Handling Precautions When you handle the 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, verify that the module
ejector handles are open.
■When you slide the module into the 7-slot chassis, match the left and
right module guides. In the 8-slot chassis or 16-slot chassis, match the
upper and lower module guides.
For details, see “Installation Prerequisites” and “Installing the Module”
later in this guide.

9-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide 5
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 you ordered
(Model Number 3CB9LG9MC).
2Remove the module, in its antistatic bag, from the shipping box.
3Observing the caution instructions, remove the module from its antistatic
bag and inspect it for physical damage.
CAUTION: Handle the module only by the front panel. Do not touch any
components, pins, leads, or solder connections.
If the module appears to be damaged, replace it in the antistatic bag, put
it back in the shipping box, and contact your network supplier.
4Verify that the box also contains:
■CoreBuilder 9000 Release Notes for the Fast Ethernet and Gigabit
Ethernet Layer 2 Switching Modules
■9-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module
Quick Start Guide for the CoreBuilder 9000 Enterprise Switch (this
guide)
If the listed contents are not in your shipping box, contact your network
supplier.
All shipping boxes are reusable. After you remove the contents, replace
the packing materials and store the shipping box for future use.

69-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide
Installation
Prerequisites
Before you install the 9-port GEN Layer 2 Switching Module, make the
following preparations:
■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 the Fast Ethernet and
Gigabit Ethernet Layer 2 Switching Modules for important information
about installing and upgrading modules in an existing chassis or 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 the Fast Ethernet and Gigabit
Ethernet Layer 2 Switching Modules for a module software compatibility
requirements table, mandatory upgrade procedures, and other important
information.
Module Placement
in the Chassis
Note the following chassis slot restrictions and recommendations when
you choose a chassis slot for the 9-port GEN Layer 2 Switching Module:
■In the 7-slot chassis
■Do not install the module in slot 7. This slot is reserved for a GEN
Switch Fabric Module
■Install the module in slot 1, 2, 3, 4, 5, or 6.
■In the 8-slot chassis:
■Do not install the module in slot 7 or slot 8. These slots are
reserved for GEN Switch Fabric Modules.
■Install the module in slot 1, 2, 3, 4, 5, or 6.

9-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide 7
■In the 16-slot chassis:
■Do not install the module in slot 8 or slot 9. These slots are
reserved for GEN Switch Fabric Modules.
■To optimize backplane performance, install the module in slot 1, 2,
3, 4, 5, 6, 7, 10, 11, or 12.
■3Com recommends that you do not install the module in slot 13,
14, 15, or 16 because these slots have only one connection to the
backplane.
Table 1, Table 2, and Table 3 list the relationship between the following:
■24-port GEN Switch Fabric Module (SFM) (Model Number 3CB9FG24
or Model Number 3CB9FG24T)
■9-port GEN Layer 2 Switching Module
■Switching module 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 following:
■9-port GEN Switch Fabric Module (SFM) (Model Number 3CB9FG9)
■9-port GEN Layer 2 Switching Module
■Switching module slots in the 7-slot chassis and the 8-slot chassis,
respectively
Use the table information to help you select a slot for your module, as
well as administer the system after you have completed the installation.

89-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide
Ta b l e 1 Mapping the 24-port GEN SFM and the 9-port GEN Switching Module to the 7-slot Chassis
Chassis Slot
Number
Number of SFM
Backplane Ports
Allocated to Slot
9-port Switching
Module Backplane
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
14; only 3 are accessed
by this module
10
11
12
1
2
3
1
2
13
24; only 3 are accessed
by this module
10
11
12
5
6
7
3
4
15
34; only 3 are accessed
by this module
10
11
12
9
10
11
5
6
17
44; only 3 are accessed
by this module
10
11
12
13
14
15
7
8
19
54; only 3 are accessed
by this module
10
11
12
17
18
19
9
10
21 (22 for Model
Number 3CB9FG24)
64; only 3 are accessed
by this module
10
11
12
21
22
23
11
12
23 (24 for Model
Number 3CB9FG24)
7Reserved for an SFM Not applicable Not applicable Not applicable

9-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide 9
Ta b l e 2 Mapping the 24-port GEN SFM and the 9-port GEN Switching Module to the 8-slot Chassis
Chassis Slot
Number
Number of SFM
Backplane Ports
Allocated to Slot
9-port Switching
Module Backplane
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
14; only 3 are accessed
by this module
10
11
12
1
2
3
1
2
13
24; only 3 are accessed
by this module
10
11
12
5
6
7
3
4
15
34; only 3 are accessed
by this module
10
11
12
9
10
11
5
6
17
44; only 3 are accessed
by this module
10
11
12
13
14
15
7
8
19
54; only 3 are accessed
by this module
10
11
12
17
18
19
9
10
21 (22 for Model
Number 3CB9FG24)
64; only 3 are accessed
by this module
10
11
12
21
22
23
11
12
23 (24 for Model
Number 3CB9FG24)
7Reserved for an SFM Not applicable Not applicable Not applicable
8Reserved for an SFM Not applicable Not applicable Not applicable

10 9-Port 1000BASE-SX Gigabit Ethernet Layer 2 Switching Module Quick Start Guide
Ta b l e 3 Mapping the 24-port GEN SFM and the 9-port GEN Switching Module to the 16-slot Chassis
Chassis Slot
Number
Number of SFM
Backplane Ports
Allocated to Slot
9-port Switching
Module Backplane
Port Numbers
SFM Backplane Port
Numbers Assigned
to Chassis Slot
SFM LED Numbers
Assigned to Backplane
Port Numbers
1 2 10
11
1
2
1
2
2 2 10
11
3
4
3
4
3 2 10
11
5
6
5
6
4 2 10
11
7
8
7
8
5 2 10
11
9
10
9
10
6 2 10
11
11
12
11
12
7 2 10
11
13
14
13
14
8Reserved for an SFM Not applicable Not applicable Not applicable
9Reserved for an SFM Not applicable Not applicable Not applicable
10 210
11
15
16
15
16
11 210
11
17
18
17
18
12 210
11
19
20
19
20
13 110 21 21
14 110 22 22
15 110 23 23
16 110 24 24