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On the BIND 9 mailing list, somebody noticed that ISC had deployed a new F root server in Toronto (F.ROOT-SERVERS.NET), and wondered if/how he could update his root cache to favor the new server in his "neighborhood". This seemed like a reasonable request to me.
The answer was just Über-geek-cool, (emphasis mine):
said by Mark Andrews, ISCAin't this cool? Posted by Steve at March 18, 2004 07:00 PM | TrackBack
All instances of F have the same IP address. Which instance you use depends on which route gets advertised to you. named doesn't get to pick which instance of F it talks too. The same is true for K and some other root servers. In general the routing system will provide the closest instance providing the peering agreements are in place to allow the route to reach you.See the following for details: ISC-TN-2003-1
Also see: http://www.isc.org/ops/f-root/
named uses RTT [Round-Trip Times -SJF] estimates to pick between nameservers for a zone. This happens at all levels of the DNS.
Cool? Yes.
New? No.
But I guess you never claimed it was new...
Posted by: Jeremy Zawodny on March 18, 2004 10:51 PMWell, that is cool. Its nice, because that's nothing I had ever thought about doing, but its exactly how the routing system is supposed to work. Pretty durn neat. And if it doesn't work perfectly, there's still no real harm done.
Posted by: Richard on March 22, 2004 04:51 PM