On Tue, Dec 30, 2008 at 7:08 PM, Naveen Nathan <nav...@calpop.com> wrote: > I have a client that would like to announce a /18 & /19 over BGP in > Sacramento and LA, us being the second location in LA. Our location > will be a failover location incase Sacramento goes down. > > They want failover for extreme cases when they're completly down in > Sacramento. They have strict requirements so that traffic to their blocks > should exclusively go to Sacramento or LA.
Announce from Sacramento normally. Announce from LA with an AS prepend 3 or 4 deep. GRE tunnel from LA back to Sacramento diverting the few packets which insist on going to LA back to Sacramento during normal operation. Or conditionally announce in LA based on a monitoring process which watches Sacramento and deal with the extra complexity and longer restoration time. 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
