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Cisco Bug: CSCup65040 - Premature clear of delayed reset flags in some cases

Last Modified

Jul 31, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

5.2.2.BASE 5.2.2.ROUT

Description (partial)

A path received from a neighbor may be marked "stale" permanently, or some paths received from a neighbor may get deleted.

All the following conditions must be satisfied.

1. Graceful restart or long-lived graceful-restart is configured for the neighbor,
2. The neighbor undergoes a session reset caused by the peer device closing the socket. 
3. Either of the following happens in the middle of a period during which BGP is processing all its paths for marking them as stale or deleting previously marked stale paths:
 3a. The neighbor session goes down.
 3b. The neighbor session comes back up and the the neighbor advertises one or more its routes.
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