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Cisco Bug: CSCvu57850 - OSPF: Process exception and restart during ospf session flap

Last Modified

Sep 02, 2020

Products (1)

  • Cisco ASR 9000 Series Aggregation Services Routers

Known Affected Releases

7.0.14.BASE 7.3.1.BASE

Description (partial)

OSPF process exception and restart

This is only applicable when OSPF is enabled for Segment Routing.

The condition is triggered by a rare timing condition when one of the router's stale (i.e. previously purged) Extended Prefix or Link LSA is received by the router. Such a scenario may happen with high scale and route/topology churn.

E.g. this was seen during test on an OSPF ABR, during OSPF session flap and route churn
There were ~20K (~20K prefix SIDs) nodes and ~40K OSPF routes in the topology.
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