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Chapter 8
Troubleshooting
Troubleshooting the Link Interface Subsystem
Check
In general, the case where no traffic is coming out of the SCE 2000 is often caused by link problems or
GBE interface configuration. Note that in some cases, the problem which seems as a transmit problem
could be in the Rx (no traffic is being received by the SCE 2000 or there is actually no traffic on the line,
which could be a normal situation).
In CLI commands of GigabitEthernet interfaces, # stands for the number of the interface. This can be 1
Note
through 4.
Problems in the link interface subsystem could be any of the following:
•
•
•
Table 8-7
Troubleshooting the Link Interface Subsystem
Symptom
Link is down. (LINK
•
LED not lit)
•
Status is WARNING
(Status LED is flashing
orange)
Output counters not
•
incrementing.
OL-7824-07
Table 8-7
to help isolate a problem in the link interface subsystem.
Link is down. (LINK LED not lit and system status is WARNING)
Peer does not receive traffic from SCE 2000 (GBE link is lit and Tx LED is flashing)
GBE link is up but not receiving from peer (GBE link is lit, but Rx LED is not flashing)
Diagnostic Action
CLI command:
show interface
•
GigabitEthernet 0/#
counters
CLI commands:
show interface
GigabitEthernet 0/#
counters
Check output of this
command for: "In good
unicast packet" and "Out
unicast packet". These
counters should be constantly
incrementing.
Possible Cause
Connector is not connected to
the platform or to the
network.
GBE cable is broken.
Auto-negotiation may be
incorrectly configured.
Cisco SCE 2000 4xGBE Installation and Configuration Guide
Troubleshooting Overview
Possible Solution
Reconnect the cable to the
GBE port and to network.
Reconnect / replace the cable
to the GBE port.
If GBE counters are
incrementing, this indicates
LED problem. Contact
customer support.
Check
Cabling the Line Ports
and Completing the
Installation,
page 6-1
configuration in the
SCE 2000 and in peer.
8-11
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Table of Contents
Troubleshooting
