<p><br>
On Jun 12, 2012 6:28 PM, "Erik Kline" <<a href="mailto:ek@google.com">ek@google.com</a>> wrote:<br>
><br>
> > Yes. It becomes an arms race.<br>
> ><br>
> > That said, any one got any good ideas to balance this out? Besides praying<br>
> > that apple cares about the internet or the cgns will scale and work great?<br>
><br>
> I can't claim credit for the idea, but perhaps instead of playing TTL<br>
> tricks CDNs can just load-balance differently. If the requested query<br>
> type is an A RR, and the resolver's source IP is one of those known to<br>
> have v6 clients (or not one of those known to have broken v6) send<br>
> them to a datacenter that's a bit further away that the v6 datacenter.<br>
<br>
That is pretty good, in fact much better than playing TTL games, but not ideal because some network operator must assume the cost of additional transport. </p>
<p>CB</p>