[OSPF] Query regarding draft-ietf-ospf-ospfv3-graceful-restart-04.txt

["satyapraveenkumar pasalapudi" <[e-mail]>]

Hi,

In section

*3.1  Preservation of LSA ID to Prefix Correspondence*

*    In OSPFv2 there is a direct correspondence between type 3 and type 5
    LSA IDs and the prefixes being advertised.  For OSPFv3, the LSA ID
    for inter-area prefix LSAs and external LSAs is simply an unsigned 32
    bit integer.  To avoid network churn during graceful restart, the
    restarting router SHOULD preserve the LSA ID to prefix correspondence
    across graceful restarts.*

**

My query is why is to maintain LS-ID prefix correspondence?

How it will cause network churn ?



Rgds,

Praveen.

**

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