From: Petr Lapukhov (petrsoft@gmail.com)
Date: Thu Jun 15 2006 - 16:57:41 ART
Basically, you may suppress summary prefix of any kind
(inter-area, external) with "no-advertise" keyword:
area x range a.b.c.d 255.0.0.0 no-advertise (ABR type 3 LSA)
or
summary-address a.b.c.d 255.0.0.0 no-advertise (ASBR type 5 LSA)
That would filter all prefixes being summarized.
with NSSA you may also put summary-address at ABR, to
filter Type-7 LSAs being translated to Type 5.
HTH
Petr
2006/6/15, CCIEin2006 <ciscocciein2006@gmail.com>:
>
> Don't think the filter-list prefix would work.
>
> Can you elaborate on:
> not-advertise with area range on ABR
>
> How is that accomplished?
>
>
> On 6/15/06, Ivan <ivan@iip.net> wrote:
> >
> > distribute-list out work only on routers where external prefixes
> > originating.
> > To filter LSA 3-4-5 you can use
> > *) not-advertise with area range on ABR
> > *) summary-address - make anoter external prefix)
> > ***) filter-list prefix - not sure about this)
> >
> > > Hello group,
> > >
> > > I tried filtering External LSA's between areas with an area filter
> list
> > but
> > > it does not work! I was told that filter lists do not work on External
> > > LSA's. Is that true?
> > >
> > > Also I tried using inbound distribute lists but it seems the External
> > LSA's
> > > are still being forwarded to the next hop routers and it seems I have
> to
> > > use distribute lists on all the routers...
> > >
> > > How do you filter External LSA's?
> > >
> > > Thanks.
> > >
> > >
> _______________________________________________________________________
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> >
> > --
> > Ivan
>
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