[72220] in North American Network Operators' Group
Re: ultradns reachability
daemon@ATHENA.MIT.EDU (Stephen J. Wilcox)
Fri Jul 2 15:40:32 2004
Date: Fri, 2 Jul 2004 20:39:49 +0100 (BST)
From: "Stephen J. Wilcox" <steve@telecomplete.co.uk>
To: Joe Abley <jabley@isc.org>
Cc: "Christopher L. Morrow" <christopher.morrow@mci.com>,
"Nanog@Merit. Edu" <nanog@merit.edu>, k claffy <kc@caida.org>,
James Edwards <hackerwacker@cybermesa.com>
In-Reply-To: <33C3E77C-CC33-11D8-AB36-000A95E7E6B4@isc.org>
Errors-To: owner-nanog-outgoing@merit.edu
On Fri, 2 Jul 2004, Joe Abley wrote:
> All the failure modes that ISC has seen with anycast nameserver
> instances can be avoided (for the authoritative DNS service as a whole)
> by including one or more non-anycast nameservers in the NS set.
Am I missing something..
So you say:
10.1.0.1 Anycast (x50 boxes)
10.2.0.1 Non-anycast
is somehow different from
10.1.0.1 Anycast1 (x50 boxes)
10.2.0.1 Anycast2 (x50 boxes - different to anycast1)
In each scenario two systems have to fail to take out any one customer.. but
isnt the bottom one better for the usual pro anycast reasons?
Steve
