alex,

 You should not flush and reoriginate the Summary LSA
 every time Dijkstra is calculated. A summary LSA should
 be flushed only if the prefix it describes became
 unreachable, and should be reoriginated (as as result
 of Dijkstra) if the cost has changed.

 If the destination is not reachable, it is removed
 from the routing table. Other details are implementation-
 specific.

--
Alex Zinin
Friday, August 10, 2001, 4:38:00 AM, alex lerin wrote:
> Hi
>       According to RFC if any router LSA has changed
> the routing table is to be calculated right from the
> scratch.
>       If this is to happen what abt the summary LSAs
> that were generated previously.Should all those
> summary LSAs be flushed or only those LSAs with
> unreachable destinations are to be flushed.If that is
> the case how to find which LSAs has a destination
> unreachable.
> It would be better if someone can tell me what all has
> to be done when a router LSA has changed
> Thanks
> alex
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