From: Eric Leung (eric.lwc@gmail.com)
Date: Tue Sep 18 2007 - 20:14:47 ART
I see, it's cool.
Thanks, Ben.
2007/9/19, Ben <bmunyao@gmail.com>:
>
> Eric,
>
> Thats correct. This would be one way to filter the net 10.1.1.0 from being
> advertised to the other areas.
> PS:The router has to be an ABR.
>
> Ben
>
> On 9/18/07, Eric Leung <eric.lwc@gmail.com> wrote:
> >
> > Hi Ben,
> >
> > I am also looking into this. And say I have a specific route:
> > 10.1.1.0/24 and I want to filter without using area filter-list. Can I
> > do this:
> >
> > router ospf 1
> > network 10.1.1.0 0.0.0.255 area 1
> > area 1 range 10.1.1.0 255.255.255.0 not-advertise
> >
> > Thanks,
> > Eric.
> >
> >
> > 2007/9/18, Ben <bmunyao@gmail.com>:
> > >
> > > Hi Tom
> > >
> > > Ordinarily you use the "area range" command to summarize subnets in an
> > > area.
> > > It suppresses the specifics and sends only the summary (LSA3) to the
> > > other
> > > areas.
> > >
> > > "area range not-advertise" is a filtering mechanism for inter-area
> > > routes.
> > > You use it when the task requirement is for you to filter out certain
> > > specifics from being advertised to other areas, and there are
> > > restrictions
> > > e.g. do not use "area filter-list"
> > >
> > > HTH
> > >
> > > Ben
> > >
> > >
> > > On 9/18/07, ccie preparation < ccie22@gmail.com> wrote:
> > > >
> > > > Folks,
> > > > I am confussed about area range command do-not-advertise
> > >
> > > > option.
> > > > the documentation says
> > > >
> > > > not-advertise :Sets the address range status to DoNotAdvertise. The
> > > Type 3
> > > > summary LSA is suppressed and the component networks remain hidden
> > > from
> > > > other networks.
> > > >
> > > > Does it mean that the abr would block the summart and the specifics?
> > > what
> > > > is
> > > > the point then?
> > > >
> > > > also the default behaviour is to send the summary and specifics
> > > together?
> > > >
> > > > Thanks,
> > > > Tom
> > > >
> > > >
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