[c-nsp] route maps and bgp

Alexander Koch efraim at clues.de
Tue Oct 4 04:53:26 EDT 2005


On Mon, 3 October 2005 21:57:02 -0600, james edwards wrote:
> ip prefix-list neighbor1 seq 5 permit a.b.c.d/24
> ip prefix-list neighbor1 seq 10 permit e.f.g.h/20
> ip prefix-list neighbor2 seq 5 permit a.b.c.d/24
> ip prefix-list neighbor2 seq 10 permit e.f.g.h/20

Be careful! Whenever you have BGP customers change that
please. A prefix-list is no good in that case, as when your
customer is not sending you his network range you will send
whatever is best in your routing table. Usually you then
'leak' that range from your transit (because it's best).

BGP communities is the only sane thing to do here.

Alexander



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