Cisco Catalyst 4500 Series, Software Configuration Manual

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80-20
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 80 Performing Diagnostics
Switch#
Troubleshooting the Test Failures
A failure of any of the POST tests reflects a problem with the hardware on the supervisor engine.
Cisco IOS boots the supervisor engine with limited functionality, allowing you to evaluate and display
the diagnostic test results. To determine the failure cause, do one of the following:
•
Evaluate whether the hardware failure is persistent by power cycling the supervisor engine to rerun
the POST tests.
• Remove and reinsert the supervisor engine into the chassis to ensure that the seating is correct.
Contact Cisco Systems customer support team for more information.
Note
On a redundant chassis, concurrent POST is supported on supervisor engines that are already inserted.
However, if a second supervisor engine is inserted while the first one is loading, you might boot the first
supervisor engine in a faulty Cisco IOS state (POST will abort, and some of the POST’s tests will be
bypassed). This situation only happens during concurrent bootup of the supervisor engines. You should
not insert any additional supervisor engines in the empty supervisor engine slot while an already seated
supervisor engine is running POST. The POST sequence is completed when the “Exiting to ios...”
message is displayed.