[c-nsp] Prefer (outbound) certain bgp peer for AS or subnet ?

CiscoNSP List cisconsp_list at hotmail.com
Tue Oct 15 21:49:55 EDT 2013

Thanks for everyone's responses - Would the following work (Prefer upstream B egress for the subnet in question)?

route-map TEST permit 10
 match ip address 100
 set local-preference 200

neighbor UPSTREAM_B route-map TEST in


> From: cisconsp_list at hotmail.com
> To: cisco-nsp at puck.nether.net
> Date: Tue, 15 Oct 2013 13:17:20 +1100
> Subject: [c-nsp] Prefer (outbound) certain bgp peer for AS or subnet ?
> Hi,
> Have 2 BGP peers with upstreams(full tables from each)  on an ASR1000, and we are seeing asymmetric routing for an AS (and /24) - Customer believes this is causing performance issues.
> Egress traffic to this AS + /24 is going via upstream A (As it only has 3 AS's - Upstream B has 4 AS's to this destination), but return traffic is coming in via upstream B.
> What is the best method to prefer upstream B egress (For AS or  /24)?  (But still maintain redundancy if upstream B should go down)?
> Cheers
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