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OSPF routes disappear from routing table after OSPF Neighbor restarts and Security Gateway acts as OSPF Graceful Restart Helper Technical Level
Symptoms
  • OSPF routes disappear from kernel routing table after OSPF Neighbor restarts and the Security Gateway is configured to act as OSPF Graceful Restart Helper.
Cause

When OSPF Neighbor sends Grace-LSA (Link-Local Opaque LSA) after Dead Interval expired, RouteD daemon downgrades its state to DOWN, and then accepts the Grace-LSA (when the Neighbor is in EXCHANGE state).


Solution
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