Specifications

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Cisco 12016, Cisco 12416, and Cisco 12816 Router Clock and Scheduler, Switch Fabric, and Alarm Card Replacement Instructions
OL-13811-01
Troubleshooting the Switch Fabric
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
-------- -------- -------- -------- --------
Los 0 0 0 0 0
state Off Off Off Off Off
crc16 876 257 876 876 876
To Fabric FIA Errors
-----------------------
sca not pres 0 req error 1
uni fifo overflow 0
grant parity 1
multi req 0 uni fifo undrflow 0
cntrl parity 0 uni req 0 crc32 lkup parity 0
multi fifo 0 empty DST req 0 handshake error 0
cell parity 0
The common failure patterns and recommended actions for grant parity and request errors are as follows
(one step at a time until the problem goes away):
1. Grant errors on more than one line card:
a. Replace the CSC (see the note below to know which one should be swapped)
b. Replace the backplane
2. Grant errors on one line card:
a. Replace the line card
a. Replace the CSC (see the note below to know which one should be swapped)
b. Replace the backplane
Note If multiple line cards are reporting grant parity or request errors and the router is still functioning, then
a CSC switchover has occurred. The failed CSC is the one that is currently the backup CSC (not the one
listed as “Master Scheduler” in the show controllers fia output). If “Halted” is next to the heading
“From Fabric FIA Errors” or “To Fabric FIA Errors”, or if the router is no longer forwarding traffic, then
a CSC switchover has not occurred and the failing CSC is the one listed as “Master Scheduler.” By
default, the CSC in slot 17 is the primary and the CSC in slot 16 is the backup.
Properly Seating Switch Fabric Cards
The switch fabric cards in the router can be challenging to insert, and may require a small amount of
force to seat correctly. If either of the CSCs are not seated properly, you may see the following error
message: