From: Martyniak, James (martynij@xxxxxxxxxxxxxx)
Date: Tue Sep 04 2001 - 15:49:26 GMT-3
I am positive this was a bug but, I found the config interesting enough that
I was not sure how the OSPF process would handle summaries and an AS
External originating from a different area.
R1 R2
X
R3 R4
R1 --summary originates here.
R2 --AS external originates here.
All routes show up in R3 with the /28 and /24.
R4 only shows the summary.
All routers are ABR/ASBR(R2), all touching area 0
All non backbone areas are local to single routers.
The topology is as accurate as I can get with ASCII. The topology is quite
a bit more complex but, not worth showing here.
The reason for no config is that this is a multi vendor environment.
Jimmy Martyniak
Network Engineer
University of Pennsylvania Health System
(215)662-6243
-----Original Message-----
From: Peter van Oene [mailto:pvo@usermail.com]
Sent: Tuesday, September 04, 2001 2:23 PM
To: Martyniak, James
Cc: CCIELAB (E-mail)
Subject: Re: OSPF Real World
Assuming R1-R2-R3 toplogy, the type 5 from R1 should not be filtered at
R2 given R2 is an ABR unless the area used on the R1-R2 link is NSSA
On 04 Sep 2001 14:07:47 -0400, Martyniak, James wrote:
> What does OSPF define to do when:
>
> AS external route 10.10.10.16/28 R1
> area summary 10.10.10.0/24 R2
> R3 does not show the /28 even though this external is more explicit then
the
> /24 and originates from a different ASBR the R1?
>
> Not proper OSPF but, real world funky things happen. Summaries have
bitten
> me more then once!
>
> Jimmy Martyniak
> Network Engineer
> University of Pennsylvania Health System
> (215)662-6243
> **Please read:http://www.groupstudy.com/list/posting.html
**Please read:http://www.groupstudy.com/list/posting.html
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