[c-nsp] Load balancing outbound traffic with BGP

Pete Templin petelists at templin.org
Tue Feb 26 22:58:11 EST 2008


Hay Kan Sugeng wrote:
> imho,
> 
> for equal cost use maximum-paths.
> 
> http://www.cisco.com/en/US/docs/ios/12_3/iproute/command/reference/ip2_k1g.html#wp1058588

Have you actually used this in production, and seen the results you're 
claiming?

 From the 12.2 doc, BGP, Path Selection Algorithm:

11.  If the following conditions are true, insert the route for this 
path into the IP routing table:

- Both the best route and this route are external.
- Both the best route and this route are from the same external 
autonomous system.
- The maximum-paths router configuration command is enabled.

Seems to me that three different upstreams would fail the second 
condition, so it wouldn't work for this person's application.

pt


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