Specifications

Channelized and Electrical Interface Line Card Installation and Configuration

78-16417-02

Configuring and Troubleshooting Line Card Interfaces

(remainder of output omitted)

The type of failure that has occurred in the show context slot 2 example is identified by the underlined

SIG= value. The three most common types of line card failures are:

• Software Forced Crash (SIG=23)

• Bus Error (SIG=10)

• Cache Parity Exception (SIG=20)

In the example above, the line card has failed and has caused a reload because of a software forced crash

exception. Once you have determined the cause and collected the necessary output, you can check for

any caveats in your Cisco IOS software release using the Bug Toolkit (available to registered Cisco.com

users only).

Checking the Current Status of the Line Card

Once you have determined if the problems are caused by system errors in the log or an actual crash, it is

important to check the current status of the line card to see if it has recovered from the failure. The status

of individual line cards can be identified either by examining the alphanumeric LEDs located on the front

of the line card, or by issuing the show led command.

show led Output

Router# show led

SLOT 1 : RUN IOS

SLOT 6 : DNLD FABL

SLOT 7 : RP ACTV

SLOT 10 : RUN IOS

SLOT 11 : RUN IOS

SLOT 13 : RUN IOS

SLOT 14 : RUN IOS

Note It is possible for the value of an alphanumeric LED to be reversed. For example, IOS RUN may be

displayed as RUN IOS.

If the alphanumeric LEDs on the line card display anything other than IOS RUN, or the RP is neither the

active Master/Primary nor the Slave/Secondary, there is a problem and the line card has not fully loaded

correctly. Before replacing the line card, try fixing the problem by following these steps:

Step 1 Reload the microcode using the global configuration microcode reload slot command.

Step 2 Reload the line card using the hw-module slot reload command. This causes the line card to reset and

download the MBus and fabric downloader software modules before attempting to download the Cisco

IOS software.

Step 3 Reset the line card manually. This may rule out any problems that are caused by a bad connection to the

MBus or switching fabric.