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Posted by Barry Margolin on June 24, 2005, 1:09 am
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srp336@getcoactive.com wrote:
> I've got a router with 2 T1s going to different ISPs. Each ISP
> advertises a default route to this router with the same weight via BGP.
>
>
> What is the normal behavior in this situation? I was hoping to get the
> router load sharing the outbound traffic equally between the 2 T1s.
> What I get is all outbound traffic going out the T1 where the
> destination IP address is the lowest. How can I equalize the outgoing
> traffic?
Default routes are processed the same way any other routes are, by
comparing attributes like AS path length, weight, local preference, etc.
If all the BGP attributes are the same, the final tie-breaker is the age
of the route (older routes are preferred).
BGP is very poor at load balancing. Search the newsgroup archive for
"bgp load balance" to find past discussions and suggestions.
--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
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