Hi guys, But keep in mind that 'prepend communities' are fragile: I decide by local preference whereto I send my traffic.
Cheers, mh Le 30 oct. 2017 à 18:25, à 18:25, Leo Bicknell <bickn...@ufp.org> a écrit: >In a message written on Thu, Oct 26, 2017 at 01:54:17PM -0600, Clinton >Work wrote: >> I believe that Jason is asking about an ISP BGP community to prepend >> their AS when the BGP routes are received from the customer (not when > >Yeah, I typoed my example, should have been: > >There are paths: > >1 2 3 5 >1 2 4 5 > >If you prepend your ASN, you get: > >1 1 2 3 5 >1 1 2 4 5 > >No difference. If you send the ISP a prepend community for 3, you get: > >1 2 2 3 5 >1 2 4 5 > >And you just forced all traffic to the second, shorter path. For only >customers that are dual homed to 3 & 4 without affecting other traffic. > >-- >Leo Bicknell - bickn...@ufp.org >PGP keys at http://www.ufp.org/~bicknell/
