Subject: Regarding OSPFv2 Graceful Restart

From: "Karthikeyan Subramaniam" <[email-masked]>
Date: 6 Oct 2004 13:37:21 -0000

Hello,

According to the RFC 3623, Grace LSA is link local opaque LSA. 

Cosider the below scenario in which all routers are configured in same area,

R1----------R2--------------------R3

R3 is going for graceful restart and R2 is in helper mode. Let us assume all routers have R3 LSA with age 3500 (3600 being the MaxAge). Now R3 is undergoing graceful restart for a Grace Period of 200s. Meanwhile R3 LSA in R1 would have been purged. In such a case packet destined for networks reachable via R3 will be dropped at R1..

How RFC 3623 provides solution for this??

TIA
Karthik

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