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AS 701 local-pref answer.
Mike Leber wrote: >If they set local pref for both peers and customers >to 100 how do they >ensure that the customer transit routes are >announced to peers? >The reason I ask this is because if a customer >announces a customer of >theirs to you that a peer also has as a customer >you will have equal >length routes for the same destination AS. While >there are many ways to >deterministicly prefer customer routes, local pref >is the most common. AS 701 always announces the best route, as their routers know it. Their average AS-path length is under 2, so it doesn't seem to be a problem. If a customer of AS 701 wants to insure that his/her route is advertised in all cases, s/he could send a community which AS701 edge devices could use to manipulate local-preference upward. [this was covered in a previous posting on this topic] I leave it to your imagination whether peers would be permitted to do this. -David Barak I only speak for myself. "Quis custodes ipsos custodiet?" - Juvenal __________________________________________________ Do You Yahoo!? Check out Yahoo! Shopping and Yahoo! Auctions for all of your unique holiday gifts! Buy at http://shopping.yahoo.com or bid at http://auctions.yahoo.com