[nsp] Multi-VRF BGP: Does it support unique BGP AS number per VRF?

Scott Morris swm at emanon.com
Wed Aug 6 22:52:38 EDT 2003

If you wanted to do that in order to peer with each customer separately
(first, I'd ask why!), but then I'd suggest using the 'local-as' feature
to override your default AS when advertising to each particular

There are some caveats to it, like it must be on a true ebgp
connection...  But it can be done.  Check out:

Scott Morris, MCSE, CCDP, CCIE4 (R&S/ISP-Dial/Security/C&S) #4713,
CCNA-WAN Switching, CCSP, Cable Communications Specialist, IP Telephony
Support Specialist, IP Telephony Design Specialist, CISSP, JNCIS
CCSI #21903
swm at emanon.com

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of William Chu
Sent: Wednesday, August 06, 2003 8:50 PM
To: cisco-nsp at puck.nether.net
Subject: [nsp] Multi-VRF BGP: Does it support unique BGP AS number per

Is it possible to put in unique BGP AS number under each customer VRF
in BGP? It's like creating multiple virtual customer BGP routers with
VRF having its own BGP AS number. Right now it seems like it can't be
(I am using IOS 12.3.1a) and all VRFs inherit the same BGP AS number
was defined under the global BGP process.

With Multi-VRF EIGRP (new in IOS 12.2.15T) I was able to enter unique
process number in a per-VRF environment. I wish I can do the same for 
Multi-VRF BGP.


William Chu

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