[c-nsp] filtering bgp routes

[Alban Dani]

Richard,
thank you.

You are right, and I have tried to convince the people that we're peering
with to do that but to no avail.

So I am knind of stuck. Perhaps I should juist deny everything and put some
static routes in there.

Alban


On 5/11/06, Richard Mikisa <rmikisa at gmail.com> wrote:
>
> aha, not sure you can accept the entire /20 and then deny the 208 and
> 209. I would have my neighbour break down the prefix he is announcing
> to something like
>
> 216.221.208.0/23 --- which is what you want to deny
>
> and then the one's you want to accept accept
>
> 216.221.210.0/23
> 216.221.212.0/22
> 216.221.216.0/21
>
> Would be easier to build filters based on that .
>
> On 5/11/06, Alban Dani <albcisco at gmail.com> wrote:
> >
> > I am sorry,
> >
> > I ment I want everything but the 208 and 209, hence me trying to filter
> > them.
> >
> > Thank you,
> >
> >
> > Alban
> >
> >
> >
> > On 5/11/06, Richard Mikisa <rmikisa at gmail.com> wrote:
> > > You state that you only want to receive prefixes 208 and 209 from the
> > > neighbor, but your prefix list is a deny for both 208 and 209. I am
> > > missing something ?
> > >
> > > On 5/11/06, Alban Dani <albcisco at gmail.com> wrote:
> > > > Hi,
> > > >
> > > > I got my lab going and many things are much clearer.
> > > >
> > > > However I still have a remaining issue.
> > > >
> > > > My neighboring router is advertising an aggregate 216.221.2.08/20.
> > > >
> > > > I do not want everything but the  216.221.208 and 216.221.209networks.
> > > >
> > > > I tried prefix lists like:
> > > >
> > > > ip prefix-list savvis-inbound deny 216.221.208.0/24
> > > > ip prefix-list savvis-inbound deny 216.221.209.0/24
> > > > ip prefix-list savvis-inbound permit 0.0.0.0/0 le 32
> > > >
> > > > but it did not filter anything?
> > > >
> > > > Any way I can achieve this/
> > > >
> > > > Thanks,
> > > >
> > > > Alban
> > > > _______________________________________________
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> > > >
> > >
> > >
> > > --
> > > cheers
> > > Richard
> > >
> >
> >
>
>
> --
> cheers
> Richard
>