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Re: Question regarding anycasting in CDN setup
From: Joe Provo <nanog-post () rsuc gweep net>
Date: Wed, 8 Feb 2012 15:07:30 -0500

On Thu, Feb 09, 2012 at 01:28:07AM +0530, Anurag Bhatia wrote:
I have never did such setup, but I assume it works as you say. I wonder how
it finds a US based system from IP quickly (since it's DNS server)?

Drop "ip geolocation" or "internet geolocation" into Your Favorite 
Search Engine. Short answer is some folks just refer to databases
published/generated by others, some folks use DNS guesses, and some
folks measure packet arrival. And most often, there is a combination 
of methods used.

         RSUC / GweepNet / Spunk / FnB / Usenix / SAGE / NewNOG

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