Meaning 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.
Related
Documentation
Monitoring the SIBs on page 413•
Verifying SIB Failure
To verify SIB failure:
1.
Check the SIB Connection on page 426
2.
Check the SIB Fuses on page 426
3.
Perform a SIB Swap Test on page 427
Check the SIB Connection
Purpose To verify SIB failure by checking the SIB connection.
Action 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:
Check the SIB Fuses
Purpose To verify SIB failure by checking the SIB fuses.
Action 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.)
Copyright © 2012, Juniper Networks, Inc.426
M Series and T Series Routers Monitoring and Troubleshooting Guide
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