Specifications

26
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
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 switch-over 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 appears 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 switch-over did not occur and the failing CSC
is 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
messages:
%MBUS-0-NOCSC: Must have at least 1 CSC card in slot 16 or 17
%MBUS-0-FABINIT: Failed to initialize switch fabric infrastructure
Note You may also get this error message if there are only enough CSCs and SFCs seated for quarter
bandwidth configurations. Quarter bandwidth configurations are no longer supported on
Cisco 12000 Series routers.
When managing switch fabric and line card booting problems, it is important to verify that all CSCs and
SFCs are correctly seated and powered on. The output from the show version and show controllers fia
commands tells you which hardware configuration is currently running on the box. Important data is
underlined.
Router#show version
Cisco Internetwork Operating System Software
IOS (tm) GS Software (GSR-P-M), Experimental Version 12.0(20010505:112551)
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Mon 14-May-01 19:25 by tmcclure
Image text-base: 0x60010950, data-base: 0x61BE6000
ROM: System Bootstrap, Version 11.2(17)GS2, [htseng 180]
EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
BOOTFLASH: GS Software (GSR-BOOT-M), Version 12.0(15.6)S,
EARLY DEPLOYMENT MAINTENANCE INTERIM SOFTWARE