[nsp] eBGP routes not balancing

Bruce Pinsky bep at whack.org
Mon Nov 17 17:22:59 EST 2003

Hash: SHA1

Jeff Chan wrote:

| After enabling "bgp bestpath compare-routerid" and resetting the
| sessions, most of the traffic went to the peer with the lower
| numerical address (ID), which again is unbalanced.  So I've
| disabled compare-routerid and will probably reset all the
| sessions late at night with "clear ip bgp all" in the hopes
| that the ages of the routes will then be close enough, since
| they're all cleared and re-learned at the same time, to
| result in traffic that is closer to balanced.
| Both providers are large, our pipes to them and routing tables
| learned similar sized, so balanced traffic should be a
| reasonable goal.  Any other suggestions are welcomed.  Aside
| from external route servers, how is anyone else dealing with
| this?  Balancing fully multi-homed traffic must be an issue
| for lots of folks....    Why can't IOS just do the right thing?

Cause that's not what the standards say to do :-)

There are a number of companies that have developed products in the Routing
Optimization space that are designed to overcome some of these kinds of
issues.  Suggest you take a look at products from folks like Proficient
Networks or Routescience.


Version: GnuPG v1.2.2 (MingW32)


More information about the cisco-nsp mailing list