From: William Chen (kwchen@netvigator.com)
Date: Mon May 17 2004 - 10:07:34 GMT-3
Hi,
I will talk about the difference of these two commands. However, it is
really scenario dependent to say which is better in improving the bandwidth
usage.
The "ip ospf database-filter" will prevent the flooding of LSA in the
interface. Therefore, it is important that you must make sure LSA are
flooded to the neighbor by other paths. (For example, you have two
point-to-point connection between two routers) Otherwise, you will have a
routing problem clearly.
The "ip ospf database-filter" does not stop the flooding of LSA. However,
the LSA are flagged as DNA (Do not age), and the periodic re-flooding (about
30 minutes) is not needed. When there is a topology change, the LSA will
still be flooded.
HTH.
Best Regards,
William Chen
----- Original Message -----
From: "Fernando, Emil" <emil.fernando@atosorigin.com>
To: <ccielab@groupstudy.com>
Sent: Monday, May 17, 2004 5:59 AM
Subject: OSPF LSA filtering
> Hi Group,)
>
> In OSPF there are two interface commands ( ip ospf database-filter and
ip
> ospf flood-reduction ) that we can use to improve bandwidth usage.
> Can someone help me to understand when I should use these commands and
which
> command is more effective than the other one. What OSPF does when these
> commands ara enabled ? Can I use these commands on a tail site to improve
> the routing performance of the tail site ?
>
> Regards
>
> Emil
>
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