nanog mailing list archives
Re: Anycast provider for SMTP?
From: Ray Soucy <rps () maine edu>
Date: Wed, 17 Jun 2015 17:38:10 -0400
NTP might have been a bad example for the timing reasons. One thing to keep in mind with anycast is that unless there are problems the routes are fairly stable and depending on how many servers you deploy and what route visibility you have even different providers will often see the same location as the closest path in terms of BGP. I believe pool.ntp.org employs anycast to some extent, but I'm not sure about that. SNTP seems to to have a discovery component designed to work well with anycast. RFC 7094 has a good summary of all this. In general, the consensus seems to be that anycast is better used for discovery services rather than services themselves. On Wed, Jun 17, 2015 at 5:12 PM, Chuck Church <chuckchurch () gmail com> wrote:
----Original Message----- From: NANOG [mailto:nanog-bounces () nanog org] On Behalf Of Ray Soucy Sent: Wednesday, June 17, 2015 3:14 PM To: Joe Hamelin Cc: NANOG list Subject: Re: Anycast provider for SMTP?As such, you typically only see it leveraged for simple services (e.g.DNS, NTP). I've been thinking about this for NTP. Wouldn't you end up with constant corrections with NTP and Anycast? Or is the assumption your anycasted NTP hosts are all peers of each other and extremely close in time to one another? That still wouldn't address the latency differences between the different hosts. Chuck
-- Ray Patrick Soucy Network Engineer University of Maine System T: 207-561-3526 F: 207-561-3531 MaineREN, Maine's Research and Education Network www.maineren.net
Current thread:
- Re: Anycast provider for SMTP?, (continued)
- Re: Anycast provider for SMTP? Joe Hamelin (Jun 15)
- Re: Anycast provider for SMTP? Rafael Possamai (Jun 15)
- Re: Anycast provider for SMTP? Joe Hamelin (Jun 15)
- Re: Anycast provider for SMTP? William Herrin (Jun 16)
- Re: Anycast provider for SMTP? Joe Hamelin (Jun 15)
- Re: Anycast provider for SMTP? Joe Hamelin (Jun 16)
- RE: Anycast provider for SMTP? Chuck Church (Jun 17)
- Re: Anycast provider for SMTP? Joe Abley (Jun 17)
- Re: Anycast provider for SMTP? Ray Soucy (Jun 17)
- Re: Anycast provider for SMTP? Kurt Kraut via NANOG (Jun 18)
- Re: Anycast provider for SMTP? Christopher Morrow (Jun 18)
- Re: Anycast provider for SMTP? Ray Soucy (Jun 18)
- Re: Anycast provider for SMTP? Joe Abley (Jun 18)
- Re: Anycast provider for SMTP? Ben (Jun 18)
- Re: Anycast provider for SMTP? Rob Seastrom (Jun 18)
- Re: Anycast provider for SMTP? Jonas Björk (Jun 18)
- Re: Anycast provider for SMTP? Joe Abley (Jun 18)
- Re: Anycast provider for SMTP? Nick Hilliard (Jun 18)
- Re: Anycast provider for SMTP? Baldur Norddahl (Jun 18)