R E V I E W D R A F T — C I S C O C O N F I D E N T I A L
8-8
Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0
Chapter 8 Troubleshooting a Cisco 7500 Series Router
Troubleshooting Guidelines for the Cisco 7507 and Cisco 7507-MX
–
If no and the DC OK LED is on, ensure that the fan tray is seated properly. See the
“Removing
and Replacing the Cisco 7505 Fan Tray” section on page 5-5
to remove and reseat the fan tray.
Ensure that the fan control board edge connector is inserted fully in the backplane socket. After
you replace the chassis cover panel, try starting the system again.
•
Do the system and the fans start up but shut down after about 2 minutes?
–
If you have changed the configuration register boot field settings or altered the configuration
file boot instructions, the system could be booting a software image (earlier than Cisco IOS
Release 9.17[6]) that does not recognize the signals from the fan control board (and therefore
assumes that the cooling subsystem is not operating). Make certain that you are booting a
software image appropriate for the Cisco 7505 and RSP.
–
If the following message is displayed, it indicates that one or more fans has failed or is operating
out of tolerance:
%ENVM-2-FAN: Fan array has failed, shutdown in 2 minutes
If one or more fans or the fan control board fails, you must replace the fan tray.
–
If the following message is displayed, it indicates that the system has detected an
overtemperature condition or out-of-tolerance power inside the chassis:
Queued messages:
%ENVM-1-SHUTDOWN: Environmental Monitor initiated shutdown
If an environmental shutdown results from an out-of-tolerance power condition, the DC OK LED will
go off before the system shuts down. (See the
“Troubleshooting the Cisco 7505 Power Subsystem”
section on page 8-7
.)
Although an overtemperature condition is unlikely at initial startup, ensure that heated exhaust air from
other equipment is not entering the inlet vents, and that there is sufficient clearance around the sides of
the chassis to allow cooling air to flow. See the guidelines in
Chapter 2, “Preparing for Installation,”
for
preventive site preparation information.
This message could also indicate a faulty component or temperature sensor. Before the system shuts
down, use the show environment or show environment table command to display the internal chassis
environment. (For detailed descriptions of show commands, see the
“Cisco 7505 Environmental show
Command Examples” section on page 2-27
.)
If you are still unable to resolve the problem, contact a service representative for further instructions.
Troubleshooting Guidelines for the Cisco 7507 and
Cisco 7507-MX
Figure 8-2
shows the general troubleshooting strategy for the Cisco 7507 and Cisco 7507-MX. Refer to
this chart to isolate problems to a specific subsystem and resolve the problem, if possible.
