Verifying Sib Failure; Check The Sib Connection; Check The Sib Fuses - Juniper M Series Monitoring And Troubleshooting Manual

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M Series and T Series Routers Monitoring and Troubleshooting Guide

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Verifying SIB Failure

The chassisd database provides the date, time, and a component status message. The

chassisd database is dynamic. It is initialized at router startup and is updated when

components are added or removed. You can search for multiple items in the chassisd

log file by using the | match sib command to see error messages that are generated when

a SIB fails or is offline. Use this information to diagnose a SIB problem and to let JTAC

know what error messages were generated and the router events that occurred before

and after the problem. For more information about system log messages, see the Junos

OS System Log Messages Reference.

Monitoring the SIBs on page 413

To verify SIB failure:

Check the SIB Connection on page 426

Check the SIB Fuses on page 426

Perform a SIB Swap Test on page 427

To verify SIB failure by checking the SIB connection.

To check the SIB connection, make sure that it is properly seated in the midplane. Ensure

that none of the pins are bent. Check the thumbscrews on the ejector locking tabs. Issue

the following command:

To verify SIB failure by checking the SIB fuses.

The M320 router requires fuses for the SIBs. The fuses for the Control Board, SIBs, and

FPCs are located in the rear of the midplane behind the power supply in slot PEM0. When

the fuse for a SIB blows, the SIB stops functioning even though it is installed correctly

and the power supplies are providing power to the router.

Figure 232 on page 427

shows the location of the fuses in the rear of the midplane for the

SIBs. (The labels shown in the figure do not appear on the actual fuses—the clear cover

on every fuse reads BUSS GMT-X—and might not match the labels on the midplane.

Ignore the labels on the midplane.)