Re: How to filter external OSPF routes from database ?

What does the Cisco Doc tell you about that command?

Hint: It's only effective on a particular LSA type.

On Tue, Nov 10, 2009 at 7:44 AM, Tomasz Solski <tom.solski_at_gmail.com> wrote:

> How to filter external OSPF routes from database ?
>
> Here is an example:
>
> R1------Ar0------R2------Ar1-------R3
>
> R1 redistributes routes into Area 0.
>
> I want ot configure R2 so R3 does not have a specific external route in its
> database.
>
> I tried on R2:
> <<<
> ip prefix-list R1toR3 seq 5 deny 1.1.12.0/24
> ip prefix-list R1toR3 seq 10 permit 0.0.0.0/0 le 32
> router ospf 1
> area 1 filter-list prefix R1toR3 in
> >>>
>
> but it looks like external routes can not be filtered with filter list. As
> soon as I advertise 1.1.12.0/24 on R1, instead of redistributing it, it
> disappears from R3's database and routing table.
>
>
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Received on Wed Nov 11 2009 - 08:15:21 ART