5-7
Catalyst 4500 E-Series Switches Installation Guide
OL-13972-02
Chapter 5 Troubleshooting
Troubleshooting Backplane Modules
Step 8
If the system is still detecting a fan assembly failure, check for details using the CLI and contact the
Cisco TAC for assistance.
System Messages and Fan Problems
Look for system messages reporting a temperature problem or problem with the fans. Individual
messages may suggest different solutions. Connect a terminal to the console port, and look for any of
the following system messages:
C4K_CHASSIS-2-INSUFFICIENTFANSDETECTED
C4K_CHASSIS-2-INSUFFICIENTFANSSHUTDOWN
C4K_IOSMODPORTMAN-4-CRITICALTEMP
C4K_IOSMODPORTMAN-4-FANTRAYBAD
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
If you see any of these messages or other messages related to fans, go to the following location and enter
the message text to find recommendations for your situation.
http://www.cisco.com/cgi-bin/Support/Errordecoder/index.cgi
Useful CLI Commands
The
show environment status fantray
command can give additional information useful in diagnosing
fan tray problems.
Troubleshooting Backplane Modules
The Cisco Catalyst 4500 E-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-E and 4510R-E chassis. Spare redundancy modules (
WS-X4590-E=
)
and a clock module (
WS-X4K-CLOCK-E=
) are available for serviceability.
The following conditions indicate that you may need to replace the redundancy modules and clock
module:
•
The switch powers down and stays down for a few minutes to a few days for no clear reason.