Re: How to filter external OSPF routes from database ?

I might be very late in here but I just saw that Piotr has joined
MicronicsTraining . Congratulations Piotr !!! ( belated though..a month I
guess ? )

Good on you as well, Narbik !!!!

Ravi
On Mon, Nov 9, 2009 at 8:49 PM, Piotr Matusiak <piotr_at_ccie1.com> wrote:

> Hi,
>
> Take a look at the following free class on demand and you will master that
> topic in minutes:
>
> http://www.micronicstraining.com/videos/filtering-ospf-prefixes-section-1.zip
>
> HTH,
> --
> Piotr Matusiak
> CCIE #19860 (R&S, SEC)
> Technical Instructor
> MicronicsTraining.com
>
> If you can't explain it simply, you don't understand it well enough -
> Albert Einstein
>
>
> 2009/11/9 Tomasz Solski <tom.solski_at_gmail.com>
>
> > 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.
> >
> >
> > Blogs and organic groups at http://www.ccie.net
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Tue Nov 10 2009 - 11:57:12 ART