On 6/Jun/16 20:03, Tom Smyth wrote:
> as far as im aware ... a friend of mine on INEX in Ireland said most cdns > use source ip of the DNS requests to determine which network to direct them > to ... so if you use you have your own resolver on an ip address in your > network range cdns can accurately determine what network the request is > comming from and determine what ip address / what network that the cdn has > nearest to your network... > > ff you use 3rd party dns servers for your clients... you may not get an > optimal ip answer for your dns queries from the CDNS involved Some CDN's use DNS (in addition to latency, congestion levels, busy state, e.t.c.). Others use Anycast routing, which I tend to prefer. The problem is the latter run a network while the former may typically not. Mark.