Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-29 Thread Randy Bush
It is more important that a domain registrar not refuse to register a domain, or erroneously declare a valid listing invalid. The purpose of using a registrar is to establish DNS delegation, not to validate your site's redundancy meets the absolute best possible practices for fault

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-29 Thread Stephane Bortzmeyer
On Mon, May 28, 2012 at 06:56:29PM -0500, Brett Frankenberger rbf+na...@panix.com wrote a message of 15 lines which said: How does your employer know if two nameservers (two IP addresses) are on the same subnet? The current heuristic for IPv4 is belongs in the same /28 (and /64 for IPv6).

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-29 Thread David Conrad
Jimmy, On May 28, 2012, at 9:58 PM, Jimmy Hess wrote: The purpose of using a registrar is to establish DNS delegation, not to validate your site's redundancy meets the absolute best possible practices for fault tolerance. Terminology nit: the purpose of a registrar is to allow folks the

DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Anurag Bhatia
Greetings everyone! 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

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread David Conrad
Anurag, On May 28, 2012, at 11:51 AM, Anurag Bhatia wrote: 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). IMHO appropriately so.

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Tony Finch
Anurag Bhatia m...@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

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Anurag Bhatia
On Tue, May 29, 2012 at 12:50 AM, Tony Finch d...@dotat.at wrote: Anurag Bhatia m...@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

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Stephane Bortzmeyer
On Tue, May 29, 2012 at 12:21:10AM +0530, Anurag Bhatia m...@anuragbhatia.com wrote a message of 28 lines which said: I know few registry/registrars which do not accept both (or all) name servers of domain name on same subnet. Since my employer is one of these registries, let me mention

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Patrick W. Gilmore
On May 28, 2012, at 15:24 , Anurag Bhatia wrote: On Tue, May 29, 2012 at 12:50 AM, Tony Finch d...@dotat.at wrote: Anurag Bhatia m...@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

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Anurag Bhatia
On Tue, May 29, 2012 at 1:07 AM, Patrick W. Gilmore patr...@ianai.netwrote: On May 28, 2012, at 15:24 , Anurag Bhatia wrote: On Tue, May 29, 2012 at 12:50 AM, Tony Finch d...@dotat.at wrote: Anurag Bhatia m...@anuragbhatia.com wrote: One small concern I wanted to discuss here. I know few

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Randy Bush
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

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread maxlarson . henry
Q --Message d'origine-- De : Randy Bush À : Anurag Bhatia Cc : NANOG Mailing List Objet : Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Envoyé : 28 mai, 2012 17:03 I am building redundancy within that setup. I mean it will be software based BGP

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Randy Bush
maxlarson.he...@transversal.ht wrote: Q --Message d'origine-- De : Randy Bush À : Anurag Bhatia Cc : NANOG Mailing List Objet : Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Envoyé : 28 mai, 2012 17:03 ... Envoyé par mon BlackBerry de

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Max Larson Henry
List Objet : Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies Envoyé : 28 mai, 2012 17:03 ... Envoyé par mon BlackBerry de Digicel QED, eh?

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Brett Frankenberger
On Mon, May 28, 2012 at 09:32:29PM +0200, Stephane Bortzmeyer wrote: On Tue, May 29, 2012 at 12:21:10AM +0530, Anurag Bhatia m...@anuragbhatia.com wrote a message of 28 lines which said: I know few registry/registrars which do not accept both (or all) name servers of domain name on

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Mikkel Mondrup Kristensen
On May 29, 2012, at 01:56 , Brett Frankenberger wrote: On Mon, May 28, 2012 at 09:32:29PM +0200, Stephane Bortzmeyer wrote: On Tue, May 29, 2012 at 12:21:10AM +0530, Anurag Bhatia m...@anuragbhatia.com wrote a message of 28 lines which said: I know few registry/registrars which do not

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Mark Andrews
In message 5ebc0868-05d2-435e-a671-e957af72f...@one.com, Mikkel Mondrup Krist ensen writes: On May 29, 2012, at 01:56 , Brett Frankenberger wrote: On Mon, May 28, 2012 at 09:32:29PM +0200, Stephane Bortzmeyer wrote: On Tue, May 29, 2012 at 12:21:10AM +0530, Anurag Bhatia

Re: DNS anycasting - multiple DNS servers on same subnet Vs registrar/registry policies

2012-05-28 Thread Jimmy Hess
On 5/28/12, David Conrad d...@virtualized.org wrote: On May 28, 2012, at 11:51 AM, Anurag Bhatia wrote: 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