[c-nsp] BGP Communities - Sample Configs

[Edward A. Trdina III]

Think of a community as a "group" of route-map statements that can be
applied either to your transit peers, or to your downstream peers.  So
that any feedback provided to one community triggers an action.  I tend
to think of it kinda like route-maps.  If a certain condition is met,
then take this action, else (do something different).

If you need help putting together a community config, I can provide some
guidance. 


Regards,
 
Edward A. Trdina III
 
Senior Network/Systems Engineer
 
Clayton Kendall, Inc.
150 West Street
East Pittsburgh, PA 15112
 
Office (412)829-2201 x31
Cell    (412)334-8000

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Paul Stewart
Sent: Friday, October 26, 2007 3:19 PM
To: 'Koch, Christian'; 'Mike Louis'; 'cisco-nsp List'
Subject: Re: [c-nsp] BGP Communities - Sample Configs

Thanks for all the replies.... I'm actually looking for IOS config
showing how to take a community being sent from a customer and apply
that towards a community received from an upstream for example.
Furthering that a bit, if I wanted one of our downstreams to be able to
prepend their IP space specifically towards one of our upstreams or
perhaps not advertise at all...

This all seems to be route-map driven but can't quite figure out the
total picture ...

Thanks,

Paul
 

-----Original Message-----
From: Koch, Christian [mailto:ckoch at qualitytech.com]
Sent: Friday, October 26, 2007 3:17 PM
To: Mike Louis; Paul Stewart; cisco-nsp List
Subject: RE: [c-nsp] BGP Communities - Sample Configs

Or.. 
http://www.onesc.net/communities/


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Mike Louis
Sent: Friday, October 26, 2007 3:02 PM
To: Paul Stewart; 'cisco-nsp List'
Subject: Re: [c-nsp] BGP Communities - Sample Configs

There are some good links to the ISP policies on the nanog site:

http://www.nanog.org/filter.html



-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Paul Stewart
Sent: Friday, October 26, 2007 2:49 PM
To: 'cisco-nsp List'
Subject: [c-nsp] BGP Communities - Sample Configs

Hi folks...

I'm looking for a site or info on BGP communities.  I have a fairly good
understanding I think, we use them on some upstreams today to influence
routes etc.....

My question is that now we want to implement BGP communities in our
network core.  This way our BGP customers can influence routes to our
upstreams and peers.  Anyone have any good resources on this as I'm
missing a small piece of the puzzle and/or best practices on
implementing?

Thanks,

Paul



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