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Howto for BGP black holing/null routing



Maybe I read your question wrong, but null-routing things at your border is
often not very useful if the traffic is flooding your transit links. Most
transits publish their community lists - you just need to tag the prefix you
want to blackhole with the right community.

See example from HE: http://www.he.net/adm/blackhole.html

<http://www.he.net/adm/blackhole.html>-Jack Carrozzo

On Tue, Feb 22, 2011 at 4:42 PM, David Hubbard <
dhubbard at dino.hostasaurus.com> wrote:

> I was wondering if anyone has a howto floating around on the
> step by step setup of having an internal bgp peer for sending
> quick updates to border routers to null route sources of
> undesirable traffic?  I've seen it discussed on nanog from
> time to time, typically suggesting using Zebra, but could
> not search up a link on a step by step.
>
> Thanks,
>
> David
>
>