nanog mailing list archives
Re: Looking for geo-directional DNS service
From: Bill Woodcock <woody () pch net>
Date: Tue, 15 Jan 2008 09:00:31 -0800 (PST)
On Tue, 15 Jan 2008, Hank Nussbacher wrote: > The Ultradns (now Neustar) Directional DNS service is based on > statically defined IP responses at each of their 14 sites so there > is no proximity checking done. Yes, and that's how anycast works: it directs traffic to the _topologically nearest_ server. So as long as there's a DNS server topologically near your data server, your users will get the topologically nearest of your servers. Which is why so many content folks _do_ roll their own: to ensure fate-sharing between the DNS traffic which effectively selects the data server, and the eventual data traffic. If you're doing things on the Internet, instead of the physical world, topological distance is presumably of much greater interest than whatever geographic proximity may coincidentally obtain. -Bill
Current thread:
- Looking for geo-directional DNS service Hank Nussbacher (Jan 15)
- Message not available
- Re: Looking for geo-directional DNS service Hank Nussbacher (Jan 15)
- Message not available
- RE: Looking for geo-directional DNS service Hank Nussbacher (Jan 15)
- Re: Looking for geo-directional DNS service Hank Nussbacher (Jan 15)
- Message not available
- Re: Looking for geo-directional DNS service Bill Woodcock (Jan 15)
- Re: Looking for geo-directional DNS service Patrick W. Gilmore (Jan 15)
- Re: Looking for geo-directional DNS service Joe Greco (Jan 15)
- Re: Looking for geo-directional DNS service Patrick W.Gilmore (Jan 15)
- Re: Looking for geo-directional DNS service Paul Vixie (Jan 15)
- Re: Looking for geo-directional DNS service Joe Greco (Jan 15)
- Re: Looking for geo-directional DNS service Paul Vixie (Jan 16)
- Re: Looking for geo-directional DNS service Joe Greco (Jan 16)
- Re: Looking for geo-directional DNS service Patrick W. Gilmore (Jan 15)
- Re: Looking for geo-directional DNS service Steve Gibbard (Jan 16)
- Re: Looking for geo-directional DNS service Joe Abley (Jan 15)