[dns-operations] Quick anycast primer

[John Payne]

On Jul 14, 2006, at 7:57 AM, Jim Reid wrote:

>>
>> Hence topologically closer and not geographically or  
>> anythingelseally closer
>
> Which as I said depends on the definition of "topologically  
> closer". You seem to favour a definition based on what the routing  
> tables say: a logical topology if you will. Which is fine, up to a  
> point. But there's also a physical topology which is where the  
> cables go and the paths packets take.

As we're talking about a network service, the only topology that  
makes sense is the IP network topology, which has only a small  
correlation to the physical paths of the fibers and cables.