JUNOS Internet Software Network Operations Guide: Hardware
334 ! Verifying SIB Failure
What It Means 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 an SIB fails or is offline. Use this information to diagnose an 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 System Log Messages Reference.
Verifying SIB Failure
Steps To Take To verify SIB failure, follow these steps:
1. Check the SIB Connection on page 334
2. Check the SIB Fuses on page 334
3. Perform an SIB Swap Test on page 336
Step 1: Check 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.
Step 2: Check 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 an SIB blows, the SIB stops functioning even though it is
installed correctly and the power supplies are providing power to the router.
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