North American Network Operators Group
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Re: ultradns reachability

  • From: Stephen J. Wilcox
  • Date: Fri Jul 02 15:42:02 2004 
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