Cisco Catalyst X4232 Installation And Configuration Note page 26

Removing and Installing a Layer 3 Services Module
The patch cord is required to comply with IEEE standards. The IEEE found that link distances could
not be met with certain types of fiber-optic cable due to a problem in the center of some fiber-optic cable
cores. The solution is to launch light from the laser at a precise offset from the center by using the patch
cord. At the output of the patch cord, the LX/LH GBIC is compliant with the IEEE 802.3z standard for
1000BASE-LX. For a detailed description of this problem, refer to the Catalyst 4003 and 4006 Switch
Installation Guide.
We do not recommend using the LX/LH GBIC with MMF without a patch cord for very
Note
short link distances (tens of meters) either. The result could be an elevated bit error rate
(BER).
Attaching Interface Cables to the Layer 3 Services Module
This section describes how to connect the interface cables to the installed Catalyst 4003 and 4006
Layer 3 Services module.
Attaching the Console Port Interface Cable
A console serial port (RJ-45) lets you manage your system using standard console equipment.
For RJ-45 connectors, plug the interface cable connector into the receptacle on the module. Push in the
connector until you hear a click; the click indicates that the connector is fully inserted and secured in
the receptacle.
Attaching the 10/100 MGT Port Cable
The 10/100BASE-T port (RJ-45) supports remote console interfaces. This port is for network
management only. This port is not a switching port. There is no connectivity between this port and the
Gigabit Ethernet switching ports.
For RJ-45 connectors, plug the interface cable connector into the receptacle on the module. Push in the
connector until you hear a click; the click indicates that the connector is fully inserted and secured in
the receptacle.
Attaching the GBIC Interface Cable
Warning Because invisible laser radiation may be emitted from the aperture of the port when no
cable is connected, avoid exposure to laser radiation and do not stare into open
apertures.
To connect GBICs to the Gigabit Ethernet or Gigabit EtherChannel ports, perform these steps:
Remove the plugs from the GBIC optical bores; store them for future use.
Step 1
Remove the plugs from the SC connector (see Figure 8) on the fiber-optic cable. Insert the connector
Step 2
into the GBIC. When you plug the SC connector into the GBIC, make sure that both the transmitter
and receiver fiber-optic cables are fully inserted into the SC connector.
Step 3 If you are using the LX/LH GBIC with MMF, install a patch cord between the GBIC and MMF cable.
Installation and Configuration Note for the Catalyst 4000 Layer 3 Services Module
26
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