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Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
Chapter 5 Troubleshooting the Installation
Troubleshooting the Switch Fabric
The common failure patterns and recommended actions for crc16 errors are as
follows (one step at a time until the problem goes away):
1.
Errors indicated on more than one line card from the same switch fabric card:
a.
Replace the switch fabric card in the slot corresponding to the errors.
b.
Replace all switch fabric cards.
c.
Replace the backplane.
2.
Errors indicated on one line card from more than one switch fabric card:
a.
Replace the line card.
b.
If errors are incrementing, replace the current master CSC.
c.
If errors are not incrementing and the current master is CSC0, replace
CSC1.
Grant Parity and Request Errors
Another troubleshooting indicator are the console logs or the output of the
show log
command, in the form of grant parity and request errors. Look for the
following type of message that indicates a grant parity error:
%FABRIC-3-PARITYERR: To Fabric parity error was detected.
Grant parity error Data = 0x2.
SLOT 1:%FABRIC-3-PARITYERR: To Fabric parity error was detected.
Grant parity error Data = 0x1
You can also use the output from the
show controllers fia
command. Important
information is underlined:
Router#
show controllers fia
Fabric configuration: Full bandwidth, redundant fabric
Master Scheduler: Slot 17 Backup Scheduler: Slot 16
From Fabric FIA Errors
-----------------------
redund FIFO parity 0 redund overflow 0 cell drops 76
crc32 lkup parity 0 cell parity 0 crc32 0
Switch cards present 0x001F Slots 16 17 18 19 20
Switch cards monitored 0x001F Slots 16 17 18 19 20
Slot: 16 17 18 19 20
Name: csc0 csc1 sfc0 sfc1 sfc2
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