You might find RFC1997 and RFC1998 useful.
A BGP Community is a BGP attribute value, which you may use to "color" a
(sub-)set
of BGP routes - allowing you to define policies for this (sub-)set of
routes. For
example, you wont be happy propagating what you've learned from a peer to
another
peer - in order to filter, you may color non-client routes with a BGP
community value
for making it easy to filter.
Better, more complete, discussions - you may probably find some at cisco's
Web site,
or some other vendors or University's site.
Cheers
mh
-- Michael Hallgren, Eng., Teleglobe, MH2198-RIPE>> Unfortunately, some of our upstreams have never head of what a "community" is ;( You normally should be able to change the community string in your routers by setting the policy on your boxes /stephane ---------------------------------------------------------------------------- ---------------------------------------------------------------------------- ---------------- PEREZ Stephane Carrier IP Specialist Nortel Networks ATS IP Core Infrastructure 25, allee Pierre Ziller 06560 Valbonne, FRANCE Phone: +33 4 92 96 18 05 Mail : mailto:perezs@nortelnetworks.com Fax : +33 4 92 96 16 68 www : http://www.nortelnetworks.com Esn : 296-1805 Intranet : http://hector.europe.nortel.com
-----Original Message----- From: Miguel A.L. Paraz [mailto:map@internet.org.ph] Sent: 21 March 2001 13:48 To: cisco-nsp@puck.nether.net Subject: Re: [nsp] [nsp] best practice for bgp load balancing with unequal bandwidth
On Wed, Mar 21, 2001 at 10:55:40AM +0100, Gert Doering wrote: > 3. Check with the upstream provider(s) what kind of "community" settings > exist to control incoming traffic. This can often be finer grained > than prepending. Unfortunately, some of our upstreams have never head of what a "community" is ;( What I do, is look at the Netflow stats coming from our different transit links as a guide on who to AS-path prepend. -- http://www.internet.org.ph The Philippine Internet Resource Mobile Voice/Messaging: +63-917-810-9728
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