[c-nsp] Different Traffic thru BGP links

James haesu at towardex.com
Mon Nov 22 15:58:17 EST 2004


On Mon, Nov 22, 2004 at 04:23:32PM -0200, BRA-SAO-Tomaiz,Anderson Goncalves wrote:
> Hi Guys,
> 
> I have a situation where an ISP (running BGP) will have two links with my AS backbone.
> In one of them it must allow to pass only peering traffic (from two other providers that I have direct connection) and thru the other one normal internet traffic.
> To route traffic inbound my AS is simple. Only using local-preference in the BGP at the customer side, but the problem is how to route traffic outbound my AS to the customer side, since the prefixes announced are keeped at the same routing table and are the same on both links.
> Use PBR is not desirable, cause there are too many prefixes and to much traffic thru these connections. I'm also running MPLS VPN in my backbone, if it has some solution based on this.

I'm not sure if I fully understand your topology (sorry, still low in coffee),
but can't you use local-pref in your AS as well for routes received from
customer? Even better, you can do communities to let your customer do remotely
triggered local pref on his own.

-J

-- 
James Jun                                            TowardEX Technologies, Inc.
Technical Lead                      Boston IPv4/IPv6 Web Hosting, Colocation and
james at towardex.com            Network design/consulting & configuration services
cell: 1(978)-394-2867           web: http://www.towardex.com , noc: www.twdx.net


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