tdp@discombobulated.net ("Travis Pugh") writes:

If the goal is to direct traffic from a client to the closest server farm, why not just build a box to do a BGP lookup and respond to a name lookup with the IP of that farm? No pings or zone transfers necessary.

AS path length is a rotten predictor of performance. (Just ask Cisco's Distributed Director team whether they knew that not all of AS701 was equidistant from their early adopters here in the Bay Area.) -- Paul Vixie <vixie@mibh.net> SVP for Internet Services, MFNX M.I.B.H. Inc. is a subsidiary of Metromedia Fiber Network, Inc.