From: Ng, Kim Seng David (David) (ksng@xxxxxxxxx)
Date: Sat Jun 22 2002 - 06:42:37 GMT-3
Hi Oli,
Thanks, you are right. The Null0 appears on R1 even though I removed th
e 'area 0 range' at R3.
Rgds
David
-----Original Message-----
From: Oliver Boehmer [mailto:oboehmer@cisco.com]
Sent: Saturday, June 22, 2002 4:50 PM
To: Ng, Kim Seng David (David)
Cc: ccielab@groupstudy.com
Subject: Re: OSPF virtual link removing summary address
Hi David,
don't know exactly, but by configuring the virtual link, R1 turns into an
ABR, and it will ignore the summary LSA originated by R3 for area 0 within
area 2 as it knows all about area 0 himself.
To make OSPF to IGRP redistribution work, you'd need to configure the same
summary (area 0 range ..) on R1 as well..
oli
At 12:06 22.06.2002 +0800, Ng, Kim Seng David (David) wrote:
>Hi Group,
>
> I have a scenario which I think I may have missed something. The
> scenario is as follows:
>
>
> Lo0(Area3)--R1----ethernet(Area2)---R3---frame-relay(Area0)------R4
> | | |
> | | |
> IGRP Lo0(Area2) R2
> |
> |
> R9
>
>All network at major network 170.10.x.x. The IGRP network and loopback
>interfaces are /24. The ethernet at Area2 is /26 and the frame-relay at
>Area0 is /28. To redistribute the ethernet network to IGRP, I did a 'area
>2 range' at R1 to /24. I could see the Null0 route at R1 and it was
>redistributed successfully to R9. Next is the frame-relay network. I did
>'area 0 range' at R3 and I could see the Null0 route at R3 and it also
>appeared on R1. Hence, R9 got the redistributed frame-relay network too.
>
>However, all this is accomplished before setting up the ospf virtual link
>between R1 and R3 for R1's Lo0 which is at Area 3. When I set up the
>virtual link, the /24 route to the frame-relay network just went missing
>in R1 routing table although the Null0 route still appears in R3 where I
>did the 'area 0 range' command. Instead, the /28 route of the frame-relay
>network appeared on R1 routing table. When I removed the virtual link
>between R1-R3, the /24 frame-relay route reappeared on R1 but not the /28.
>The ethernet Null0 route is not affected.
>
> Am I missing something about virtual links?
>
>Thanks
>David
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