From: Georg Pauwen (pauwen@hotmail.com)
Date: Sat Apr 26 2003 - 11:13:10 GMT-3
Hello Oliver,
I have labbed this (I assume your ABR is R2, since the virtual link is
between R2 and R5). If you put the area 51 range x.x.x.x x.x.x.x command on
R2 and R5, R3 sees only the summary route.
Regards,
Georg
>From: "Marc" <tan@dia.janis.or.jp>
>Reply-To: "Marc" <tan@dia.janis.or.jp>
>To: "'Oliver Ziltener'" <ziltener@netcloud.ch>, <ccielab@groupstudy.com>
>Subject: RE: Unclear ospf behavor
>Date: Sat, 26 Apr 2003 08:25:47 +0900
>
>Take your asci drawing and leave R1 where it is, but also add R1 to the
>right of R3, so you actually have two R1s in your drawing.
>
>---R3----R1
>
>This may help you visualize how R1 can be in two places at once...i.e. R1
>has an interface in Area0. The filtering (summarization) you did was on the
>routes in R5's ospf database, but did not affect R1's database. I have not
>tried to summarize a virtual area interface before, but I would try that
>first, area 0 range on R1. You could also "distribute-list in" at R3 and
>other backbone routers, but not as clean a solution as preventing R1 from
>sending them at all.
>
>Marc
>
>
>
> > Hello
> >
> > Network Setup:
> > R6
> > |
> > R1--R2--------R5----R3
> >
> > R2, R6, R5 are in Area 51, connected with ethernet, same
> > subnet, R5 is an
> > ABR.
> > R3 is in Area0, Link between R5 and R3 is FR.
> > R1 is in area 2, R1 to R2 is HDLC link.
> > A Virtual Link from R2 to R5.
> >
> > R6 has a few loopbacks, advertise this with ospf
> > R5 do summarization of this loopback networks. Goal: R3
> > should see only the
> > summary.
> >
> > As long as I have no VL, the summarization works perfect,
> > that mean R3 sees
> > only the summary route from the loopbacks.
> > But when I configure a VL between R2 and R5, then I get on R3
> > the summary
> > route AND all loopback routes!
> >
> > Why this behavior?
> >
> > thanks for any help
> > Oliver
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