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Cisco Bug: CSCvu81094 - fib_mgr crash seen on LC during Router Bootup

Last Modified

Sep 02, 2020

Products (1)

  • Cisco Network Convergence System 5500 Series

Known Affected Releases

7.1.2.BASE

Description (partial)

Symptom:
fib_mgr crash seen on LC during Router Bootup

Conditions:
The root cause of the crash is that one of the threads (ipv4/pv6) is mutex locked and waiting for the other thread to release the mutex for its initialization. Before this thread can initialize, we get a PROT_IF_DOWN event for the protocol that is mutex locked and awaiting initialization. As a result, since the array fib_frr_debug_stats isn't initialized yet, we experience a crash. Since the protocol thread itself is not initialized at this time, the FRR won't necessarily do anything..

This is PI FIB code, so code is platform independent. All platforms could be impacted.
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