5-9
Catalyst 4500 Series Switches Installation Guide
78-14409-08
Chapter 5 Troubleshooting
Troubleshooting Backplane Modules
C4K_IOSMODPORTMAN-4-FANTRAYPARTIALFAILURE
C4K_IOSMODPORTMAN-4-FANTRAYREMOVED
C4K_SUPERVISOR-3-FANTRAYREADFAILED
C4K_SUPERVISOR-3-FANTRAYSEEPROMREADFAILED
C4K_SUPERVISOR-3-FANTRAYSEEPROMINVALID
C4K_IOSMODPORTMAN-4-TEMPHIGH
C4K_IOSMODPORTMAN-4-TEMPUNDERCRITICAL
C4K_CHASSIS-2-OVERHEATINGSHUTDOWN
Step 4
Determine whether the airflow is restricted or if the ambient temperature in the
room is too warm.
Step 5
Determine whether the power supply is functioning properly. See the
“Troubleshooting the Power Supply” section on page 5-6
.
Step 6
Verify that the fan assembly is properly seated in the backplane by loosening the
captive installation screws, removing the fan assembly, and reinstalling it.
Step 7
Restart the system.
Step 8
Verify that all fans are operating. You should hear the fans at system start.
Step 9
If the system is still detecting a fan assembly failure, contact the Cisco TAC for
assistance.
Troubleshooting Backplane Modules
The Cisco Catalyst 4500 Series redundancy scheme uses removable redundancy
modules (also called mux-buffers), on the passive backplane to switch traffic to
the active supervisor engine. There is one redundancy module per switching
module. Redundancy modules and a redundant clock ship standard with every
Cisco Catalyst 4507R and 4510R chassis. Spare redundancy modules
(
C4K-MUX=
) and a clock module (
C4K-CLOCK=
) are available for
serviceability.
The following conditions indicate that you may need to replace the redundancy
modules and clock module:
