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Re: [isp-bgp] managing BGP w/ a colo company
Bob Hrbek wrote:
We receive our bandwidth from a colocation company that has peering w/
Sprint, Qwest, Global Crossing and Level3.   Recently the Level3 routes
started inducing some fairly significant latency.   We announce our networks
to the colo company which then announces them to their upstreams.  Is there
anyway I can manipulate my BGP announcements so my inbound/outbound traffic
prefers a provider other than Level3?   Can I just add L3's AS to my
announcement a few times? :)
No. If you add L3's AS to your announcement, L3 will reject your announcement ("it's got a loop in the AS path!") AND the other networks may send your traffic to L3.

Your only option is to ask your direct provider what BGP communities you can add to your announcement so that inbound traffic prefers anything but Level3, and beg them to select outbound paths that are anything but Level3.

Additionally, you may want to talk to your direct provider about the problems, and have them work with Level3 to try to resolve them. There could be an underlying problem that's not obvious.

(We saw a strange behavior on our UUNet connection from Saturday to Monday. We were seeing a consistent and marked increase in the rate of BGP updates, from a baseline of ~180 per five minutes to a more consistent 480ish per five minutes. These kinds of things go unnoticed in provider networks. Some people think I'm nuts to worry about graphing BGP updates, but it's a great indicator of outages and problems IMHO.)

pt





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Replies
Re: [isp-bgp] managing BGP w/ a colo company, James
[isp-bgp] anybody tell me what is going on here?, Bob Hrbek
Replies
[isp-bgp] managing BGP w/ a colo company, Bob Hrbek
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