Re: some clarifications....

["Manral, Vishwas" <[e-mail]>]

Hi Alok,

> what is the default behaviour of OSPF process on a node A when a neighbour
B
> and node A loose DD synhcronization?

> i mean , i understand the OSPF FSM, but at that point, does it
> 1. flush all routes which were given by the neighbour and then restart the
> whoel thing till the FULL state?
>
> 2. retain them till FULL state and flush it only when one enters the
"FULL"
> state again?
You cannot loose DB syncronization, unless you loose your adjacency(as
flooding in OSPF is relaible). You may however want to check the draft
http://www.ietf.org/internet-drafts/draft-nguyen-ospf-oob-resync-01.txt.

We never flush routes in OSPF, we flush LSA's. When an adjacency is lost/new
adjacency gained, a new router/network LSA is generated the SPF algorithm
takes care of excluding/including the neighbor from the routing table
calculation. Check Section 12, RFC2328. We do not the flush other routers
LSA's.

Thanks,
Vishwas