Specifications

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

Once you have gathered the show controllers fia command data from the RPs and line cards, you can

create a table similar to Table 3.

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. Whenever a replacement is recommended, first verify that the card is

correctly seated. You should ALWAYS reseat the corresponding card to be sure it is correctly seated. If,

after reseating the card, the CRCs are still increasing, then go ahead and replace the part. See the

“Properly Seating Switch Fabric Cards” section on page 31.

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 comes from 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:

Table 3 Error Data Collection Table

Card Slot CSC 0 CSC 1 SFC 0 SFC 1 SFC 2 SFC 3 SFC 4

0ERROR

2ERROR

3ERROR

5ERROR

7ERROR