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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)

Symptom:
OSPF process exception and restart

Conditions:
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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