From: Victor Cappuccio (cvictor@protokolgroup.com)
Date: Sat Jul 22 2006 - 06:09:25 ART
Hola David.
Did you read my last post?
<quote>
Sorry I forgot to add this:
I know that the ASBR could generate a 0/0 Route to the Ospf Domain, so
packets that comes from route that matches the Null 0 would be converted in
steam, but Saying that the ASBR does not generate the 0 route, has any sence
to keep the Null 0 Route ??
</quote>
Sorry I'm not fluent with English
And to eliminate the discard route in eigrp is by changing the
administrative of the summary to 255, In normal situation we receive the 0/0
route from other Routers and the Null 0 would cause that the route from
others not know in the range of the same supernet would be discarded.
Thats ok in this Distance Vector Hibrid Routing Protocol, but it that makes
Sense with OSPF??
-----Mensaje original-----
De: nobody@groupstudy.com [mailto:nobody@groupstudy.com] En nombre de David
Redfern (AU)
Enviado el: Sabado, 22 de Julio de 2006 04:17 a.m.
Para: ccielab@groupstudy.com
Asunto: RE: OSPF Null0 DRoute
I believe the side affect is that you are vulnerable to routing loops.
For example you may be following a default route to them, whilst giving
them a summary route to you. If they send traffic to a destination
within that summary that does not exist, you will follow you default
back to them. They will send it back to you via the summary, ect ect.
If you had the route to null0 you will drop any traffic that you receive
that you don't have a longer match for. Hence loop prevention.
Does anyone know a similar command or method to the discard-route
internal/external to use for eigrp to stop the null route from being
installed?
Regards,
David Redfern
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Victor Cappuccio
Sent: Saturday, 22 July 2006 5:06 PM
To: ccielab@groupstudy.com
Subject: OSPF Null0 DRoute
Hi Guys.
Have this question about summarizing external routes in OSPF and the
creation of the null0 to the summary address in the RT.
I know that I could use no discard-route external to avoid the creation
of the Null0 route, but I'm wondering what would be a side affect of
this operation. ?
Has any sense to create a Discard Route from a ASBR connected to other
routing Domain?
Thanks
Victor.-
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