nanog mailing list archives
Re: Numbering nameservers and resolvers
From: "Nick Olsen" <nick () brevardwireless com>
Date: Tue, 17 Aug 2010 15:00:11 -0400
So lets say that you have multiple DNS resolvers in the same ip space that you advertise from multiple locations. All would be fine for the most part. But if you had a location equidistant network wise from two POP's wouldn't it load balance and possibly break some TCP sessions? How would someone get around this? This is also what OpenDNS does from what I understand. Nick Olsen Network Operations (321) 205-1100 x106 ---------------------------------------- From: "Doug Barton" <dougb () dougbarton us> Sent: Tuesday, August 17, 2010 2:12 PM To: "Sven Olaf Kamphuis" <sven () cb3rob net> Subject: Re: Numbering nameservers and resolvers On 08/17/2010 05:11, Sven Olaf Kamphuis wrote:
tcp/zonetransfer not working reliably is no longer a problem
TCP is a MUST for DNS. It's used as a fallback in the normal resolution process if an answer can't fit in a UDP packet for whatever reason. This is true even for common things like large A record lists, but is only becoming more frequent in the age of DNSSEC, AAAA, etc. It is unfortunately even more necessary than we had hoped it would be due to many local network operators not "getting the memo" regarding EDNS. hth, Doug -- Improve the effectiveness of your Internet presence with a domain name makeover! http://SupersetSolutions.com/ Computers are useless. They can only give you answers. -- Pablo Picasso
Current thread:
- Re: Numbering nameservers and resolvers, (continued)
- Re: Numbering nameservers and resolvers Arie Vayner (Aug 16)
- Re: Numbering nameservers and resolvers Jared Mauch (Aug 16)
- Re: Numbering nameservers and resolvers Aria Stewart (Aug 16)
- Re: Numbering nameservers and resolvers Valdis . Kletnieks (Aug 16)
- Re: Numbering nameservers and resolvers Jeremy Kister (Aug 16)
- Re: Numbering nameservers and resolvers Randy Bush (Aug 16)
- Re: Numbering nameservers and resolvers Arie Vayner (Aug 16)
- Re: Numbering nameservers and resolvers Jeroen Massar (Aug 16)
- Re: Numbering nameservers and resolvers Doug Barton (Aug 16)
- Re: Numbering nameservers and resolvers Graham Beneke (Aug 17)
- Re: Numbering nameservers and resolvers Nick Olsen (Aug 17)
- Re: Numbering nameservers and resolvers Mikael Abrahamsson (Aug 17)
- Re: Numbering nameservers and resolvers Robert E. Seastrom (Aug 18)
- Re: Numbering nameservers and resolvers Mikael Abrahamsson (Aug 17)