Specifications

25
Cisco 12010, Cisco 12410, and Cisco 12810 Router Clock and Scheduler, Switch Fabric, and Alarm Card Replacement Instructions
OL-13810-01
Troubleshooting the Switch Fabric
This table indicates that more than one line card is reporting errors coming from SFC 1. Therefore, the
first step is to change this SFC. Each time a replacement is recommended, first verify that the card is
correctly seated. You should always reseat the corresponding card to ensure it is correctly seated. If, after
reseating the card, the CRCs still increase, then replace the part. See the “Properly Seating Switch Fabric
Cards” section on page 26.
The common failure patterns and recommended actions for crc16 errors are as follows (one step at a time
until the problem is eliminated):
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
Troubleshooting indicators include 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
-------- -------- -------- -------- --------
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