nanog mailing list archives
Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies
From: Anurag Bhatia <me () anuragbhatia com>
Date: Tue, 29 May 2012 00:54:01 +0530
On Tue, May 29, 2012 at 12:50 AM, Tony Finch <dot () dotat at> wrote:
Anurag Bhatia <me () anuragbhatia com> wrote:One small concern I wanted to discuss here. I know few registry/registrars which do not accept both (or all) name servers of domain name on same subnet. They demand at least 1 DNS server should be on different subnet for failover reasons (old thoughts). How one can deal with such case in case of anycasting setup which using one single subnet everywhere?You still want name servers on more than one subnet in case the anycast setup breaks. I am building redundancy within that setup. I mean it will be software
based BGP so if hardware if fried up, it will break BGP session and pull off routes anyway and for cases like DNS server (software) failure, I will monitor it via simple bash script which can turn bgp daemon down. So once it is off, routing tables should take it to different node.
Tony. -- f.anthony.n.finch <dot () dotat at> http://dotat.at/ South Utsire: Northwesterly 6 to gale 8 decreasing 4 or 5. Moderate or rough. Fair. Good.
-- Anurag Bhatia anuragbhatia.com or simply - http://[2001:470:26:78f::5] if you are on IPv6 connected network! Linkedin <http://in.linkedin.com/in/anuragbhatia21> | Twitter<https://twitter.com/anurag_bhatia>| Google+ <https://plus.google.com/118280168625121532854>
Current thread:
- DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Anurag Bhatia (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies David Conrad (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Tony Finch (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Anurag Bhatia (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Patrick W. Gilmore (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Anurag Bhatia (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Randy Bush (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Anurag Bhatia (May 28)
- <Possible follow-ups>
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Stephane Bortzmeyer (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Brett Frankenberger (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Mikkel Mondrup Kristensen (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Mark Andrews (May 28)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Stephane Bortzmeyer (May 29)
- Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Brett Frankenberger (May 28)