Re: How to filter external OSPF routes from database ?

I guess particular LSA on a particular router.

On Tue, Nov 10, 2009 at 4:15 PM, Martin Hogan
<martin.john.hogan_at_gmail.com>wrote:

> 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 Tue Nov 10 2009 - 16:21:37 ART