nanog mailing list archives

Re: Load Balancing Multiple DS3s (outgoing) on a 7500


From: "Stephen J. Wilcox" <steve () telecomplete co uk>
Date: Sat, 13 Mar 2004 21:57:07 +0000 (GMT)


He'll be okie.  It's just a little difficult for BGP to "load balance" 
outbound bits when the bulk of the Internet these days is 2 AS hops 
away from each of four upstreams.  Not impossible, but it doesn't 
happen by default either.

I used to do this ages ago, I did it by setting MEDs on the incoming BGP 
prefixes, in my route-maps I arbitrarily gave some nets (/8s or smaller) lower 
med on one feed and higher on the others to influence path selection.

I shy away from anything but the gentlest of tweaks so I personally wouldnt mess 
with as-path, localpref, weight etc

Steve


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