[nsp] BGP Q

jlewis at lewis.org jlewis at lewis.org
Mon Feb 9 17:24:34 EST 2004

On Mon, 9 Feb 2004, Beprojects.com wrote:

> Let's say you connect to two upstream ISP's, Sprint (for example) and ABC
> Corp.  Obviously, because of the difference in size, almost all of the
> traffic will enter and exit Sprint.  For incoming traffic, you can pre-pend
> your AS to advertisements out the Sprint link so that the path in via ABC
> and Sprint are roughly equal.  This does a pretty good job of evening up
> traffic.  The question is "can this be done on BGP advertisements that I
> receive?"  I want to pre-pend an AS to the advertisements I receive from

Yes.  You can prepend (I use the provider's ASN) received routes just as 
you would prepend outgoing routes (route-map).

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

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