[dns-operations] Quick anycast primer

John Payne john at sackheads.org
Fri Jul 14 11:38:53 UTC 2006

On Jul 14, 2006, at 4:24 AM, Jim Reid wrote:

> On Jul 14, 2006, at 08:41, Steve Gibbard wrote:
>> In a typical anycast cloud, there are several servers in several
>> locations
>> sharing a service address.  When all servers in the cloud are up, and
>> routing to all of them is working properly, queries sent to that
>> service
>> address are responded to by the topologically closest server.
> ....modulo peering agreements/policies.

Hence topologically closer and not geographically or anythingelseally  

> I suppose it all depends on what's meant by "topologically closest".

Network distance.  For most people in Boston it means "New York  
rather than across town"

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