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Cisco Bug: CSCta05722 - BFD over BVLAN stale complink session

Last Modified

May 16, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

3.9.0.BASE

Description (partial)

Symptom:

Basic issue is that there are stale complink session objects hanging around (bfd_db_comp_link_session_t). This can prevent any further BVLAN sessions configured to not come up properly.

Conditions:

Looking closely at the code, it appears that bfd_agent can fail complink session deletion if right timings are hit between complink deletions and session deletions in thread 1 and thread 3 (due to session database, session lock, and complink lock).
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