[isp-bgp] Re: Outbound Balancing

[jlewis@...]

On Fri, 23 Apr 2004, james wrote:

> OK, so 1 prepend tiped you too far over. I would move to adjusting local
> pref on selected prefixes, on just one session (BGP session). More
> weight=more prefered.

What I've done in situations like this is use an incoming route-map to
selectively match and do prepending on certain AS paths.  i.e. say you
have connections to ISPa and ISPb.  You notice that ISPa is getting most
of your outbound traffic.  Take a look at that traffic and pick a few
larger networks going out ISPa (maybe AOL, AT&T, etc.) and do a prepend on
their as paths.  That should encourage outgoing traffic to those networks
to use ISPb.  This worked really well for me, back when I was playing the
balancing game with several different sized fractional T3's.

----------------------------------------------------------------------
 Jon Lewis *jlewis@...*|  I route
 Senior Network Engineer     |  therefore you are
 Atlantic Net                |
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________






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