diag
Cisco 12000 Series Gigabit Switch Routers 33
Perofrm diagnostics on the CSC only if a redendant CSC is in the router.
Diagnostics will stop and ask you for confirmation before altering the router’s configuration. For
example, running diagnostics on a SFC or CSC will cause the fabric to go from full bandwidth to
one quarter bandwidth. Bandwidth is not affected by GRP or line card diagnostics.
The field diagnostic software image is bundled with the Cisco IOS software and is downloaded
automatically from the GRP to the target line card prior to testing.
Caution Performing field diagnostics on a line card stops all activity on the line card. Before the
diag EXEC 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 preformed are displayed. To view all the tests that are performed, 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, the line card remains down (that is, in an unbooted
state). In most cases, you stopped the testing because you need to remove the line card or replace the
line card. If that is not the case, and you want to bring the line card back up (that is, online), you must
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. In future releases this
might not be the case because DRAM and SDRAM SIMM modules might be field replaceable units.
For example, if the DRAM test failed you might only need to replace the DRAM on the line card.
For more information, refer to the Cisco 12000 series installation and configuration guides.
Examples
The following example shows the output when field diagnostics are performed on the line card in
slot 3. After the line card passes all field diagnostic tests, the Cisco IOS software is automatically
reloaded on the card. Before starting the diagnostic tests, you must confirm the request to perform
these tests on the line card because all activity on the line card is halted. The total/indiv. timeout set
to 600/220 sec. message indicates that 600 seconds are allowed to perform all field diagnostics tests,
and that no single test should exceed 220 seconds to complete.
Router# diag 3
Running Diags will halt ALL activity on the requested slot. [confirm]
Router#
Launching a Field Diagnostic for slot 3
Running DIAG config check
RUNNING DIAG download to slot 3 (timeout set to 400 sec.)
sending cmd FDIAG-DO ALL to fdiag in slot 3
(total/indiv. timeout set to 600/220 sec.)
Field Diagnostic ****PASSED**** for slot 3
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