>From Pakistan, i observe the streaming through pure IPv4, not through v6 in v4 tunnels. <br><br>Nor i find AAAA entries against <a href="http://www.youtube.com/" target="_blank">www.youtube.com</a>. <br><br><b>Regards<br><font color="#888888"><br>
Fahad Ali Khan</font></b><br><br><div class="gmail_quote">On Fri, Jan 29, 2010 at 11:48 AM, Shaun Ewing <span dir="ltr"><<a href="mailto:s.ewing@aussiehq.com.au">s.ewing@aussiehq.com.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im"><br>
<br>
On 29/01/10 11:45 AM, "Erik Kline" <<a href="mailto:ek@google.com">ek@google.com</a>> wrote:<br>
<br>
> But hopefully it's working well and correctly.<br>
<br>
</div>Good work, but there's a huge latency difference between v4 and v6 where I<br>
am (Australia) and I seem to get v6 addresses out of a Google Ireland range<br>
(2a00:1450::/32) from one set of our Google over V6 resolvers and the usual<br>
Google range I'm used to (2001:4860::/32) from another set of our resolvers.<br>
<br>
Despite that, there's no noticeable difference to user experience (ie:<br>
videos seem to play fine) so I guess that's the key factor here.<br>
<br>
Anyway, some info below if it's any use:<br>
<br>
Our main resolvers use anycast within our network, but when using the ones<br>
in my local city (CBR - which query from <a href="http://203.88.112.0/24" target="_blank">203.88.112.0/24</a>):<br>
<br>
IPv4:<br>
<br>
$ dig +short <a href="http://v21.lscache1.l.google.com" target="_blank">v21.lscache1.l.google.com</a> A<br>
74.125.109.30<br>
<br>
--- 74.125.109.30 ping statistics ---<br>
5 packets transmitted, 5 packets received, 0.0% packet loss<br>
round-trip min/avg/max/stddev = 5.132/5.264/5.560/0.154 ms<br>
<br>
And<br>
<br>
traceroute to 74.125.109.30 (74.125.109.30), 64 hops max, 52 byte packets<br>
1 172.20.10.254 (172.20.10.254) 1.673 ms 1.064 ms 1.265 ms<br>
2 172.16.0.1 (172.16.0.1) 0.257 ms 0.164 ms 0.166 ms<br>
3 <a href="http://vl2.cor1.cbr1.as24557.net.au" target="_blank">vl2.cor1.cbr1.as24557.net.au</a> (203.88.112.252) 6.260 ms 9.195 ms 1.166<br>
ms<br>
4 <a href="http://gi0-2-4.bdr2.cbr1.as24557.net.au" target="_blank">gi0-2-4.bdr2.cbr1.as24557.net.au</a> (203.88.112.18) 0.582 ms 0.522 ms<br>
0.468 ms<br>
5 <a href="http://gi0-2-4.bdr1.syd1.as24557.net.au" target="_blank">gi0-2-4.bdr1.syd1.as24557.net.au</a> (203.88.112.21) 5.492 ms 5.167 ms<br>
5.044 ms<br>
6 <a href="http://as15169.sydney.pipenetworks.com" target="_blank">as15169.sydney.pipenetworks.com</a> (218.100.2.98) 5.106 ms 5.113 ms<br>
5.287 ms<br>
7 64.233.174.253 (64.233.174.253) 5.515 ms 5.220 ms 5.738 ms<br>
8 74.125.109.30 (74.125.109.30) 5.210 ms 5.300 ms 5.384 ms<br>
<br>
Vs<br>
<br>
IPv6:<br>
<br>
$ dig +short <a href="http://v21.lscache1.l.google.com" target="_blank">v21.lscache1.l.google.com</a> AAAA<br>
2a00:1450:4001:3::1e<br>
<br>
--- 2a00:1450:4001:3::1e ping6 statistics ---<br>
5 packets transmitted, 5 packets received, 0.0% packet loss<br>
round-trip min/avg/max/std-dev = 351.175/354.353/355.477/1.600 ms<br>
<br>
And<br>
<br>
traceroute6 to 2a00:1450:4001:3::1e (2a00:1450:4001:3::1e) from<br>
2405:5000:XX, 64 hops max, 12 byte packets<br>
1 2405:5000:XX 0.882 ms 0.766 ms 0.793 ms<br>
2 <a href="http://vl2-gw.cbr1.as24557.net.au" target="_blank">vl2-gw.cbr1.as24557.net.au</a> 0.478 ms 0.389 ms 0.414 ms<br>
3 <a href="http://gi0-1-3.bdr2.cbr1.as24557.net.au" target="_blank">gi0-1-3.bdr2.cbr1.as24557.net.au</a> 0.610 ms 0.541 ms 0.469 ms<br>
4 <a href="http://ge-0-0-0-700.bdr01.cbr01.act.vocus.net.au" target="_blank">ge-0-0-0-700.bdr01.cbr01.act.vocus.net.au</a> 0.714 ms 0.759 ms 0.699 ms<br>
5 2402:7800:0:2::35 4.757 ms 6.414 ms 4.866 ms<br>
6 <a href="http://ge-0-0-2.bdr02.syd01.nsw.vocus.net.au" target="_blank">ge-0-0-2.bdr02.syd01.nsw.vocus.net.au</a> 4.922 ms 4.945 ms 4.758 ms<br>
7 2402:7800:0:2::3e 5.571 ms 11.963 ms 5.184 ms<br>
8 * * *<br>
9 * * *<br>
<br>
And when querying our other set of resolvers in SYD (these query from<br>
<a href="http://113.20.0.0/24" target="_blank">113.20.0.0/24</a>):<br>
<br>
IPv4:<br>
<br>
$ dig +short <a href="http://v21.lscache1.l.google.com" target="_blank">v21.lscache1.l.google.com</a> A<br>
74.125.98.30<br>
<br>
--- 74.125.98.30 ping statistics ---<br>
5 packets transmitted, 5 packets received, 0.0% packet loss<br>
round-trip min/avg/max/stddev = 276.145/276.523/277.288/0.451 ms<br>
<br>
And<br>
<br>
traceroute to 74.125.98.30 (74.125.98.30), 64 hops max, 52 byte packets<br>
1 172.20.10.254 (172.20.10.254) 1.834 ms 1.065 ms 1.072 ms<br>
2 172.16.0.1 (172.16.0.1) 0.245 ms 0.169 ms 0.182 ms<br>
3 <a href="http://vl2.cor1.cbr1.as24557.net.au" target="_blank">vl2.cor1.cbr1.as24557.net.au</a> (203.88.112.252) 0.732 ms 0.801 ms 0.733<br>
ms<br>
4 <a href="http://gi0-2-4.bdr2.cbr1.as24557.net.au" target="_blank">gi0-2-4.bdr2.cbr1.as24557.net.au</a> (203.88.112.18) 0.668 ms 0.563 ms<br>
0.522 ms<br>
5 <a href="http://gi0-2-4.bdr1.syd1.as24557.net.au" target="_blank">gi0-2-4.bdr1.syd1.as24557.net.au</a> (203.88.112.21) 5.993 ms 4.816 ms<br>
4.714 ms<br>
6 <a href="http://as15169.sydney.pipenetworks.com" target="_blank">as15169.sydney.pipenetworks.com</a> (218.100.2.97) 5.656 ms 6.546 ms<br>
5.921 ms<br>
7 66.249.95.234 (66.249.95.234) 6.634 ms 5.372 ms 5.466 ms<br>
8 209.85.249.52 (209.85.249.52) 108.913 ms 105.382 ms 105.407 ms<br>
9 209.85.255.34 (209.85.255.34) 107.364 ms 134.131 ms 107.195 ms<br>
10 72.14.232.114 (72.14.232.114) 176.733 ms 177.158 ms 175.981 ms<br>
11 209.85.242.233 (209.85.242.233) 181.669 ms 181.570 ms 181.603 ms<br>
12 66.249.94.39 (66.249.94.39) 219.298 ms 220.909 ms<br>
209.85.242.235 (209.85.242.235) 182.338 ms<br>
13 209.85.241.53 (209.85.241.53) 276.365 ms 278.211 ms 276.176 ms<br>
14 66.249.94.90 (66.249.94.90) 219.789 ms<br>
216.239.43.215 (216.239.43.215) 351.971 ms<br>
66.249.94.90 (66.249.94.90) 219.523 ms<br>
15 * * *<br>
16 74.125.98.30 (74.125.98.30) 276.886 ms<br>
216.239.43.215 (216.239.43.215) 277.086 ms<br>
74.125.98.30 (74.125.98.30) 276.653 ms<br>
<br>
vs<br>
<br>
IPv6:<br>
<br>
$ dig +short <a href="http://v21.lscache1.l.google.com" target="_blank">v21.lscache1.l.google.com</a> AAAA<br>
2001:4860:4001:402::1e<br>
<br>
--- 2001:4860:4001:402::1e ping6 statistics ---<br>
5 packets transmitted, 5 packets received, 0.0% packet loss<br>
round-trip min/avg/max/std-dev = 208.170/210.646/216.873/3.290 ms<br>
<br>
And<br>
<br>
traceroute6 to 2001:4860:4001:402::1e (2001:4860:4001:402::1e) from<br>
2405:5000:XX, 64 hops max, 12 byte packets<br>
1 2405:5000:XX 1.301 ms 0.852 ms 1.014 ms<br>
2 <a href="http://vl2-gw.cbr1.as24557.net.au" target="_blank">vl2-gw.cbr1.as24557.net.au</a> 0.582 ms 0.418 ms 0.464 ms<br>
3 <a href="http://gi0-1-3.bdr1.syd1.as24557.net.au" target="_blank">gi0-1-3.bdr1.syd1.as24557.net.au</a> 5.688 ms 5.097 ms 26.557 ms<br>
4 <a href="http://as15169.ipv6.sydney.pipenetworks.com" target="_blank">as15169.ipv6.sydney.pipenetworks.com</a> 5.295 ms 8.224 ms 5.466 ms<br>
5 * * *<br>
6 * * *<br>
<br>
:-)<br>
<font color="#888888"><br>
-Shaun<br>
<br>
</font></blockquote></div><br>