Cisco Systems OL-11497-03 manual

Chapter 5 Field Diagnostics for the Cisco 12000 Series Router

Using the diag Command

In some cases when field diagnostics indicates a card FAILURE, you may want to bring the line card back on line manually. In this case the microcode reload command may be used.

Caution Performing field diagnostics on a line card stops all activity on the line card. Before the diag command begins running diagnostics, you are prompted to confirm the request to perform field diagnostics on the line card.

In normal mode, if a test fails, the title of the failed test is displayed on the console. However, not all tests that are performed are displayed. To view all performed tests, use the verbose keyword.

After all diagnostic tests are completed on the line card, a PASSED or TEST FAILURE message is displayed. If the line card sends a PASSED message, the Cisco IOS software image on the line card is automatically reloaded unless the wait keyword is specified. If the line card sends a TEST FAILURE message, the Cisco IOS software image on the line card is not automatically reloaded.

If you want to reload the line card after it fails diagnostic testing, use the microcode reload slot global configuration command.

Note When you stop the field diagnostic test using the diag halt command, the line card remains down (in other words, in an unbooted state). Generally, you would stop testing in order to remove or replace the line card. If this is not the case, and you need to bring the line card back up (online), use the microcode reload global configuration command or power cycle the line card.

If the line card fails the test, the line card is defective and should be replaced. Under certain circumstances, Cisco Technical Assistance Center (TAC) engineers may direct you to replace field-replaceable memory modules and then retest. For example, if the DRAM test fails, you might only need to replace the DRAM on the line card. However, this should only be done under the guidance of a TAC engineer and only when observing tightly controlled static-sensitive device handling procedures. Do NOT replace memory components without proper body grounding and board grounding.

	Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03		5-13