From: Brian Dennis (brian@labforge.com)
Date: Sun Mar 16 2003 - 02:48:34 GMT-3
Glad that solved it. It was a good one. The difference between the cost
of the routes helped give it away ;-)
Brian Dennis, CCIE #2210 (R&S/ISP Dial/Security) CCSI# 98640
brian@labforge.com
-----Original Message-----
From: Sage Vadi [mailto:sagevadi@yahoo.co.uk]
Sent: Saturday, March 15, 2003 9:40 PM
To: Brian Dennis; ccielab@groupstudy.com
Subject: RE: OSPF: weird summarization issue
Woohoo!
Yes you are absolutely right! Yes after doing so, now
the OSPF router only installs the summarized entry,
fantastic!
I never encountered this beforehand. I guess becuase
of the way we propagates databases, not all the
database contained summaries hence the hub router will
still learning the more specific from the router
behind my two spokes!!! I keep falling into the trap
of distance-vector thinking!!!
Thanks heaps Brian!
rgds,
Sage
--- Brian Dennis <brian@labforge.com> wrote: > I was
able to create the exact same problem by using
> virtual links and
> not putting the "area range" command on the router
> behind R2 and R3.
>
> 10.1.1.0/24 [110/84] via 192.168.0.3,
> [110/84] via 192.168.0.2,
> 10.1.0.0/16 [110/74] via 192.168.0.2,
> [110/74] via 192.168.0.3,
>
> Brian Dennis, CCIE #2210 (R&S/ISP Dial/Security)
> CCSI# 98640
> brian@labforge.com
>
> -----Original Message-----
> From: Sage Vadi [mailto:sagevadi@yahoo.co.uk]
> Sent: Saturday, March 15, 2003 8:27 PM
> To: Brian Dennis; ccielab@groupstudy.com
> Subject: RE: OSPF: weird summarization issue
>
> I agree, I remembered those rules the first time
> somebody pointed them out on groupstudy. So these
> areas are different areas I can quite safely say.
>
> Also both the ABRs - have the same area ranges
> configured on them..
>
>
> R1---A0---+R2---A3
> +R3---A3
>
> R1 is a multipoint, R2/R3 physical serials. They
> have
> a A3 network which they are summarzing into A0, but
> the summarization does not works as desired:
>
> The A3 network, as it appears after area-range on
> R1:
>
> 155.10.8.0/25 [110/84] via 155.10.11.3,
> [110/84] via 155.10.11.1,
> 155.10.8.0/24 [110/74] via 155.10.11.3,
> [110/74] via 155.10.11.1,
>
> Any other thoughts Brian?
>
> rgds,
> Sage
>
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