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Running Diagnostics on the Cisco 12008 6-1
6
Running Diagnostics on the
Cisco 12008
Field diagnostics are available for the Cisco 12008 to help you isolate faulty hardware to
the level of a field-replaceable unit (FRU) without disrupting the operation of the system.
After you identify the faulty unit, you can replace it with a spare unit.
Field diagnostics are not designed to identify specific components within the router. They
simply determine whether a particular card is operational or defective.
Running Diagnostics on the Cisco 12008 is presented in the following sections:
• Diagnostic Test Overview on page 1
• Using the diag Command on page 2
• Diagnostic Testing Sequence on page 3
• Loading and Running Diagnostics on page 4
Diagnostic Test Overview
There are more than a hundred diagnostic tests for line cards, including the following:
• Processor tests
• Memory tests
• Component tests
• Major data path tests
The field diagnostics software image is bundled with the Cisco IOS software and is
downloaded from the route processor (RP) to the target card before testing.