Cisco Systems Cisco 12816 Manuale Utente

Enter the show controllers fia command for all installed line cards and save the 
output from each.

Proceed to the next section, 

Switch fabric problems can occur due to failures in any of the following 
components:

RPs

Line card hardware

The backplane

CSCs/SFCs

When troubleshooting switch fabric errors, look for patterns with regard to which 
components are reporting errors. For example, if you combine the 
show controllers fia output from all RPs and line cards, you can determine if 
there is an error pattern. The following subsections discuss the values within the 
output that can help you determine any error patterns.

The crc16 data line from the show controllers fia command is an important 
indicator of hardware problems. If one line card or one CSC/SFC has been on line, 
inserted and removed, you can expect to see some crc16 error data. However, this 
number should not continue to increase. If the number is increasing, you may need 
to replace a faulty hardware component. It is very important to correlate the data 
from both the primary RP and the secondary RP and all installed line cards. The 
example output below shows the status of the primary RP. The crc16 data line is 
underlined and is showing errors from sfc1.