On Fri, Mar 29, 2013 at 8:36 AM, Adam Vitkovsky <adam.vitkov...@swan.sk> wrote: >> If the best route you pick for the customer's advertisement goes to your > upstream instead of your customer, you won't advertise it to your peer. >> And if your customer sets a BGP community defined to mean "don't advertise > to peers" then you won't advertise it to the peer. >> Yet they may well transmit packets to you for which delivery to that peer > is directed by your routing table. > > Yes asymmetric routing would kill the update-based urpf unless there would > be an informational urpf NRLI we could use for these purposes
Hi Adam, If we go down that path, let's not overload BGP. A distinct source address advisory protocol could have highly desirable auto-aggregation and update rate characteristics versus BGP. Regards, Bill Herrin -- William D. Herrin ................ her...@dirtside.com b...@herrin.us 3005 Crane Dr. ...................... Web: <http://bill.herrin.us/> Falls Church, VA 22042-3004