Some weeks ago I noticed that 167.216.128.247/32 (www.digisle.net) appears to reach web servers located in physically different places broadly dependent on where you see it from. I presume this is done by advertising the same prefix from border routers which are in seperate IGP domains or something (confederations maybe?), but I wonder what people's views on the concept are, since it could potentially be quite confusing in certain circumstances (e.g. debugging routing problems) ? Superficially it seems like a 'cool hack' for geographic content-distribution (which is what Digital Island do), but up until now I've always seen this sort of thing done by exploiting NS record sorting order properties with the kludge of different A records in the various zonefiles, and I wondered if doing it with routing policy in this way is strictly RFC compliant (or for that matter if anyone cares if it isn't) ? M.