BGp Multihome Problems

problem with my BGP multihomed Setup.

I have a 7200 series router that connects via ebGP to verizon, and has another iBGP connection via 6500 to another 7200 which connects eBGP to SPrint.

verizon - ebgp -- 7200 -- ibgp 7200 --- ebgp sprint

physically

7200 --- 6500 --- 7200 (internally)

now i have a client with couple of T1 lines connected to 7200 (verizon).

When i look at the BGP table destined for comcast IP address (AS numbers) connection via Sprint is preferred. But comcast packets to reach my customer come through verizon because i am advertising /24 of the client via verizon. I also advertise /21 of that subnet via both.

Here is my problem. connections to website of the client do not work , but VPN works , and lots of stuff can get back to the client using TCP and UDP.

When i force 7200 to use verizon for comcast, the client websites work fine.

Any ideas?

Marcin Zgola
Internetwork Lead
CCIE #18676
Netrix, LLC
http://www.netrixllc.com
Ph. 847-964-5300
Fax.: 847-964-5350

Blogs and organic groups at http://www.ccie.net
Received on Sat Nov 06 2010 - 17:36:32 ART