3Com 3CB9RG4 User manual

4-Port Gigabit Ethernet Layer 3
Switching Module (GBIC)
Quick Start Guide
For the CoreBuilder®9000 Enterprise Switch
Module Description The 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC) (Model
Number 3CB9RG4) for the CoreBuilder®9000 Enterprise Switch provides
high-port-density, line speed, Gigabit Ethernet switching and routing on
backbone networks running at Open Systems Interconnection (OSI)
Layer 3.
The module offers the following connectivity:
■Four Gigabit Interface Converter (GBIC) ports on the front panel can
be either 1000BASE-LX (single-mode fiber) or 1000BASE-SX
(multimode fiber).
■Four Gigabit Ethernet ports connect the module to the chassis
backplane.
Key Features The 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC) supports
the following key features:
■High-density Gigabit Ethernet switching through the following
maximum number of GBIC front panel ports:
■24 ports in the 7-slot chassis and 8-slot chassis
■56 ports in the 16-slot chassis
■Ability to use multimode and single-mode 1000BASE-LX GBICs and
multimode 1000BASE-SX GBICs simultaneously on the front panel
■Ability to replace the module and GBIC ports while the chassis is
operating (which is known as hot swap)

24-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
■Stand-alone operations if a switch fabric module fails or is not
installed
■Full-duplex port operation (through front panel ports and backplane
ports)
■Management using the CoreBuilder 9000 Administration Console
command line interface, Web Management suite of applications, or
the Simple Network Management Protocol (SNMP)
For information about the software features that this module supports,
see the:
■CoreBuilder 9000 Implementation Guide
■Command Reference Guide
■CoreBuilder 9000 Release Notes for Layer 3 Switching Modules
Figure 1 identifies the components on the module front panel.
Figure 1 Front Panel of the 4-port Gigabit Ethernet Layer 3 Switching Module
(GBIC)
Port Numbering
The four front panel ports (1 – 4) correspond to the four Port Status LEDs.
Port numbers 5 – 8 on the rear of the module do not have corresponding
status LEDs on the front panel.
The logical port numbering depends on your network configuration. See
the CoreBuilder 9000 Implementation Guide for details.
3CB9RG4
MOD STAT
1234
1
2
3
4
Model number
Ejector handle
Module Status LED
Port Status LEDs
GBIC Interface ports
Ejector handle

4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 3
Module Position in the Chassis
In the 7-slot chassis, you install all switching modules horizontally, with
the module and port status LEDs on the left side.
In the 8-slot and 16-slot chassis, you install all switching modules
vertically, with the module and port status 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 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: This switching module must be installed, removed, or
replaced only by trained service personnel.
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.
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 on the module.
CAUTION: To prevent ESD-related damage:
■Always wear an ESD wrist strap (not provided) when you handle any
switching module, ensuring that the strap makes good skin contact
and is properly grounded.
■Keep the switching module in its antistatic bag until you are ready to
install it.

44-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
Handling
Precautions
When you handle the 4-port Gigabit Ethernet Layer 3 Switching Module
(GBIC), 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 guides. When you slide the module into the 8-slot chassis or
16-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 to the 3C number that appears on your
order documentation (3CB9RG4).
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 network supplier.
4Ensure that the box also contains:
■CoreBuilder 9000 Release Notes for Layer 3 Switching Modules
■4-port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start
Guide for the CoreBuilder 9000 Enterprise Switch (this guide)
All shipping boxes are reusable. After removing the contents, replace the
packing materials and store the shipping box for future use.

4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 5
Installation
Prerequisites
Before you install your 4-port Gigabit Ethernet Layer 3 Switching Module
(GBIC), 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 Layer 3 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 Layer 3 Switching Modules for a
module software compatibility requirements table, mandatory upgrade
procedures, and other important information.

64-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
Choosing a Slot for
Your Module
This section provides guidelines for choosing the best slot for your 4-port
Gigabit Ethernet Layer 3 Switching Module (GBIC).
Installation in a 7-slot Chassis
You can choose any slot in the 7-slot chassis to house a 4-port Gigabit
Ethernet Layer 3 Switching Module (GBIC) — except slot 7, which is for
the wider switch fabric modules, and slots 8 and 9, which are for the
smaller management modules.
Table 1 and Table 2 show the relationship among the Gigabit Ethernet
(GEN) Switch Fabric Modules (24-port or 9-port) and the 4-port Gigabit
Ethernet Layer 3 Switching Module (GBIC) when both are installed in a
7-slot chassis. To summarize the table:
■The switching module can use all four of its backplane ports in slots
1 – 6, when used in conjunction with a 24-port GEN Switch Fabric
Module (3CB9FG24 or 3CB9FG24T). 3Com recommends that you
install this Layer 3 switching module in any of those slots.
■The switching module can use only its first backplane port (module
port number 5) when used in conjunction with a 9-port GEN Switch
Fabric Module (3CB9FG9).
Table 1 and Table 2 also show the relationship between the GEN Switch
Fabric Module backplane port numbers and the corresponding LED
indicator numbers.

4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 7
*24-Port Gigabit Ethernet Switch Fabric Module (Model Number 3CB9FG24 or 3CB9FG24T)
Ta b l e 1 24-port GEN SFM*and 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC) in the 7-slot Chassis
Chassis Slot
No.
Number of SFM Backplane Ports
Allocated to This Slot
SFM Backplane Port
Numbers That Connect to
This Slot
LED Numbers That
Correspond to the SFM
Backplane Ports
1 4 1
2
3
4
1
2
13
14
2 4 5
6
7
8
3
4
15
16
3 4 9
10
11
12
5
6
17
18
4 4 13
14
15
16
7
8
19
20
5 4 17
18
19
20
9
10
21 (3CB9FG24T)
22 (3CB9FG24)
22 (3CB9FG24T)
21 (3CB9FG24)
6 4 21
22
23
24
11
12
23 (3CB9FG24T)
24 (3CB9FG24)
24 (3CB9FG24T)
23 (3CB9FG24)
7Reserved for an SFM Not applicable Not applicable

84-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
* 9-Port Gigabit Ethernet Switch Fabric Module (Model Number 3CB9FG9). Six ports on this module are backplane ports. The
remaining three ports are located on the front panel; LEDs 7, 8, and 9 correspond to these ports.
Ta b l e 2 9-port GEN SFM* and 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC) in the 7-slot Chassis
Chassis Slot
No.
Number of SFM Backplane Ports
Allocated to This Slot
SFM Backplane Port
Numbers That Connect to
This Slot
LED Numbers That
Correspond to the SFM
Backplane Ports
1 1 1 1
2 1 2 2
3 1 3 3
4 1 4 4
5 1 5 5
6 1 6 6
7Reserved for an SFM Not applicable Not applicable

4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 9
Installation in an 8-slot Chassis
You can choose any slot in the 8-slot chassis to house a 4-port Gigabit
Ethernet Layer 3 Switching Module (GBIC) — except slots 7 and 8 which
are for the wider switch fabric modules, and slots 9 and 10, which are for
the smaller management modules.
Table 3 and Table 4 show the relationship among the GEN Switch Fabric
Modules (24-port or 9-port) and the 4-port Gigabit Ethernet Layer 3
Switching Module (GBIC) when both are installed in an 8-slot chassis. To
summarize the table:
■The switching module can use all four of its backplane ports in slots
1 – 6, when used in conjunction with a 24-port GEN Switch Fabric
Module (3CB9FG24 or 3CB9FG24T). 3Com recommends that you
install this Layer 3 switching module in any of those slots.
■The switching module can use only its first backplane port (module
port number 5) when used in conjunction with a 9-port GEN Switch
Fabric Module (3CB9FG9).
Table 3 and Table 4 also show the relationship between the GEN Switch
Fabric Module backplane port numbers and the corresponding LED
indicator numbers.

10 4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
*24-Port Gigabit Ethernet Switch Fabric Module (Model Number 3CB9FG24 or 3CB9FG24T)
Ta b l e 3 24-port GEN SFM*and 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC) in the 8-slot Chassis
Chassis Slot
No.
Number of SFM Backplane Ports
Allocated to This Slot
SFM Backplane Port
Numbers That Connect to
This Slot
LED Numbers That
Correspond to the SFM
Backplane Ports
1 4 1
2
3
4
1
2
13
14
2 4 5
6
7
8
3
4
15
16
3 4 9
10
11
12
5
6
17
18
4 4 13
14
15
16
7
8
19
20
5 4 17
18
19
20
9
10
21 (3CB9FG24T)
22 (3CB9FG24)
22 (3CB9FG24T)
21 (3CB9FG24)
6 4 21
22
23
24
11
12
23 (3CB9FG24T)
24 (3CB9FG24)
24 (3CB9FG24T)
23 (3CB9FG24)
7Reserved for an SFM Not applicable Not applicable
8Reserved for an SFM Not applicable Not applicable

4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 11
*9-Port Gigabit Ethernet Switch Fabric Module (Model Number 3CB9FG9). Six ports on this module are backplane ports. The
remaining three ports are located on the front panel; LEDs 7, 8, and 9 correspond to these ports.
Ta b l e 4 9-port GEN SFM* and 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC) in the 8-slot Chassis
Chassis Slot
No.
Number of Switch Fabric Module
Backplane Ports Allocated to This
Slot
SFM Backplane Port
Numbers That Connect to
This Slot
LED Numbers That
Correspond to the SFM
Backplane Ports
1 1 1 1
2 1 2 2
3 1 3 3
4 1 4 4
5 1 5 5
6 1 6 6
7Reserved for an SFM Not applicable Not applicable
8Reserved for an SFM Not applicable Not applicable

12 4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
Installation in a 16-slot Chassis
You can choose any slot in the 16-slot chassis to house a 4-port Gigabit
Ethernet Layer 3 Switching Module (GBIC) — except slots 8 and 9, which
are for the larger switch fabric modules, and slots 17 and 18, which are
for the smaller management modules.
Table 5 shows the relationship among the 24-port GEN Switch Fabric
Modules and the 4-port Gigabit Ethernet Layer 3 Switching Module
(GBIC) when both are installed in a 16-slot chassis. To summarize the
table:
■The switching module can use two of its backplane ports in slots 1 – 7
and slots 10 – 12, when used in conjunction with a 24-port GEN
Switch Fabric Module (3CB9FG24 or 3CB9FG24T). 3Com
recommends that you install this Layer 3 switching module in any of
those slots.
■The switching module can use only its first backplane port (module
port number 5) in slots 13 – 16 when used in conjunction with a
24-port GEN Switch Fabric Module (3CB9FG24 or 3CB9FG24T).
Table 5 also shows the relationship between the GEN Switch Fabric
Module backplane port numbers and the corresponding LED indicator
numbers.
You cannot use the 9-port GEN Switch Fabric Module (3CB9FG9) in the
16-slot chassis.

4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 13
*24-Port Gigabit Ethernet Switch Fabric Module (Model Number 3CB9FG24 or 3CB9FG24T). You cannot use the 9-port Gigabit
Ethernet Switch Fabric Module (Model Number 3CB9FG9) in the 16-slot chassis.
Ta b l e 5 24-port GEN SFM*and 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC) in the 16-slot Chassis
Chassis Slot
No.
Number of Switch Fabric Module
Backplane Ports Allocated to This
Slot
SFM Backplane Port
Numbers That Connect to
This Slot
LED Numbers That
Correspond to the SFM
Backplane Ports
1 2 1, 2 1, 2
2 2 3, 4 3, 4
3 2 5, 6 5, 6
4 2 7, 8 7, 8
5 2 9, 10 9, 10
6 2 11, 12 11, 12
7 2 13, 14 13, 14
8Reserved for an SFM Not applicable Not applicable
9Reserved for an SFM Not applicable Not applicable
10 215, 16 15, 16
11 217, 18 17, 18
12 219, 20 19, 20
13 121 21
14 122 22
15 123 23
16 124 24

14 4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
Installing the Gigabit
Ethernet Switching
Module
To install a 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC):
1To verify that you have complied with all prerequisites and are ready to
install your 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC),
read “Installation Prerequisites” earlier in this guide.
2Before you start the installation process, read “Safety Precautions” and
“Handling Precautions” earlier in this guide.
3Select a chassis slot for your module, following the restrictions and
recommendations in “Choosing a Slot for Your Module” earlier in this
guide.
4To expose the selected chassis slot, remove the blank faceplate that
covers the chassis slot.
Save this faceplate in case you need to cover an empty slot in the future.
Empty slots must always be covered to ensure proper airflow and cooling
in the chassis.
3Com strongly recommends that you install only one module at a time
and remove only the faceplate for the slot where you intend to install the
module. Having either a module or a blank faceplate in the slots adjacent
to your selected slot helps ensure that the module’s spring-loaded screws
align properly with the corresponding holes in the chassis.
5Remove the module from its antistatic bag and open the two module
ejector handles so that they are nearly perpendicular to the front panel.
6Grasp the module with two hands — one at each end of the front panel
near the ejector handles — and begin to insert the module in the slot:
■In a 7-slot chassis, hold the module horizontally with the LEDs to the
left and then insert the module using the guides on the right and the
left of the slot.
■In an 8-slot chassis or 16-slot chassis, hold the module vertically with
the LEDs at the top (Figure 2) and then insert the module using the
guides at the top and the bottom of the slot.
CAUTION: Do not twist or bend the module when you insert it into the
chassis.
7Slide the module into the chassis by pushing firmly on the two ends of
the front panel near the ejector handles.
WARNING: Hazardous energy levels exist inside of the chassis. Do not
place hands or objects into the chassis or touch any components on an
inserted module.

4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 15
8To engage the module with the backplane, use both hands to perform
the following steps:
aPush firmly at the two ends of the front panel near the ejector handles
until you feel the module connectors make firm contact with the
backplane connectors.
bPut your left thumb on the left or top ejector handle and your right
thumb on the right or bottom ejector handle. Simultaneously, push
the ejector handles in towards the front panel until each handle is
parallel with the front panel.
CAUTION: If there is too much resistance when you try to close the
ejector handles, the module connectors and backplane connectors may
not be aligned. Forcing the module into place can damage the
connectors. If necessary, remove and reinsert the module, ensuring that
the connectors are properly aligned. Do not tighten the spring-loaded
screws to seat the module.
9To secure the module front panel to the front of the chassis, tighten its
spring-loaded screws to a torque specification of 3–5 inch-pounds.
CAUTION: Ensure that the module screws are properly aligned with the
threaded holes in the chassis; otherwise you can strip the threads and
make it impossible to secure any module in that slot.
WARNING: To ensure adequate cooling airflow and continued product
safety agency compliance, install blank faceplates over all empty slots.
You have now completed the physical installation of the 4-port Gigabit
Ethernet Layer 3 Switching Module (GBIC). See “GBIC SX Transceivers”
and “GBIC LX Transceivers” for cabling specifications.
To verify proper module operation, see “Verifying Module Operation”
later in this guide. To configure and manage the module, see “Managing
the Module” later in this guide.

16 4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
Figure 2 illustrates installation in a 7-slot chassis.
Figure 2 Installing a 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC)
into a 7-slot Chassis
R
3CB9FG24
PRI
MODSTAT
SEC
1
2
3
4
5
6
7
8
9
10
11
12
13
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3CB9FG24
PRI
MODSTAT
SEC
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6
7
8
9
10
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3CB9FG24
PRI
MODSTAT
SEC
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6
7
8
9
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24
®
CoreBuilder 9000
1
2
3
4
5
6
7
8
9
3CB9RG4
MODSTAT
1234
1
2
3
4
4-Port Gigabit Ethernet
Layer 3 Switching Module
Spring-loaded
screws

4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 17
Figure 3 illustrates installation in a 8-slot chassis.
Figure 3 Installing a 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC)
into an 8-slot Chassis
ON
R
CoreBuilder®9000
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
123456 7 8 910
3CB9RG4
MODSTAT
1234
1
2
3
4
4-Port Gigabit
Ethernet Layer 3
Switching Module
Spring-loaded
screw
Spring-loaded
screw

18 4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
Figure 4 illustrates installation in a 16-slot chassis.
Figure 4 Installing a 4-port Gigabit Ethernet Layer 3 Switching Module (GBIC)
into a 16-slot Chassis
1 2 3 4 5 6 7 8 12 13 169 10 11 1
4
15
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
3CB9FG24
PRI
MODSTAT
SEC
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
R
®
CoreBuilder 9000
3CB9LF20R
1
MODSTAT
23456
714
1X
2X
3X
4X
5X
6X
7X
8X
9X
10X
11X
12X
13X
14X
15X
16X
17X
18X
19X
20X
3CB9LF20MM
1
MODSTAT
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714
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1 2 3 4 5 6 7 8 12 13 169 10 11 14 15
3CB9FG24
PRI
MODSTAT
SEC
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3CB9FG24
PRI
MODSTAT
SEC
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3CB9FG24
PRI
MODSTAT
SEC
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3CB9FG24
PRI
MODSTAT
SEC
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3CB9FG24
PRI
MODSTAT
SEC
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3CB9FG24
PRI
MODSTAT
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R
®
CoreBuilder 9000
3CB9RG4
MOD STAT
1234
1
2
3
4
4-Port Gigabit
Ethernet Layer 3
Switching Module
Spring-loaded
screw
Spring-loaded
screw

4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide 19
Verifying Module
Operation
After you install the 4-port Gigabit Ethernet Layer 3 Switching Module
(GBIC), you must wait for the module to complete a successful
initialization process before you can proceed to configure it according to
the needs of your network. This initialization process includes power on
verification tests, diagnostic self-tests, and a software boot cycle.
Front Panel LEDs
The front panel of the 4-port Gigabit Ethernet Layer 3 Switching Module
(GBIC) contains one Module Status LED and four Port Status LEDs that
flash and change color during the module initialization process and
provide status information thereafter.
Port numbers 5 – 8 on the rear of the module do not have Port Status
LEDs on the front panel. After the module initialization process is
complete and the module is ready to manage, you can use the portState
field in the ethernet detail display to determine the status of these
ports.
Initial Activity
Whether you power on the chassis after you install the 4-port Gigabit
Ethernet Layer 3 Switching Module (GBIC) or whether you hot insert or
hot swap the module, the EME controls what happens next. The EME
reads the module inventory data that is stored on the module and
determines whether the chassis has sufficient power available to support
the module. The Module LED and Port Status LEDs remain off during this
short evaluation period (approximately 3 seconds).
If the EME does not enable power to the slot, the module initialization
process does not begin. All LEDs remain off until the available power
increases or the power configuration changes.

20 4-Port Gigabit Ethernet Layer 3 Switching Module (GBIC) Quick Start Guide
Module Initialization Process
After the EME enables power to the slot, the module initialization process
begins and lasts up to 4 minutes. The following activities occur:
■The Module Status LED flashes on (using colors yellow and green) and
off throughout the entire initialization process, although periods in the
off state may last up to 25 seconds.
■The Port Status LEDs flash on (using colors yellow and green) and off,
but they finish their sequence earlier than the Module Status LED and
they remain off until you connect cabling and establish links.
■Toward the end of the module initialization process, the
corresponding LED on the GEN Switch Fabric Module (which is listed
in Table 1, Table 2, Table 3, Table 4, and Table 5 earlier in this guide)
lights green. The module initialization process completes a few
seconds later.
Successful Initialization
If no problems exist at the completion of the module initialization
process, you see the following indicators:
■The Module Status LED lights green.
■The module’s Port Status LEDs remain off until you attach cabling and
establish links.
■The corresponding Port Status LED on the GEN Switch Fabric Module
flashes green.
After you attach cabling and establish links, the module is ready to
configure. See “Managing the Module” later in this guide.