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[Julian DeMarchi <julian AT jdcomputers.com.au>]

On 04/28/2014 09:16 AM, Mauricio Pasquier Juan wrote:
> On Mon, Apr 28, 2014 at 08:57:51AM +1000, Julian DeMarchi wrote:
>> On 04/28/2014 08:47 AM, Mauricio Pasquier Juan wrote:
>>> could you explain why, please? I'm not too familiar with what would be 
>>> needed.
>>> Something more than servers all over the world?
>>
>> You'd need a POP in each geogrpahic location you wish to serve anycast
>> from. This includes 2x DNS servers and a switch that can support
>> anycast. You'll also need your own ASN number so you can do BGP.
> 
> So, this same IP announcement for the servers is done at BGP level with 
> other
> networks?

Correct.

> What I understand is:
> 
> 1. we only need 1 ASN, to communicate with the rest of the internet

Yup.

> 2. every POP would connect to that AS with BGP

Every POP would announce the anycast prefix via BGP using the AS number.

> 3. it's backwards compatible, in the sense that we can add POPs where we
>    actually have servers but locations without close POPs would use whatever
>    they get

It is. Clients who use the IP would get to the one with the shortest
path. That is the nature of anyast.

--julian