Youtube-over-IPv6

[Shaun Ewing]

On 29/01/10 11:45 AM, "Erik Kline" <ek at google.com> wrote:

> But hopefully it's working well and correctly.

Good work, but there's a huge latency difference between v4 and v6 where I
am (Australia) and I seem to get v6 addresses out of a Google Ireland range
(2a00:1450::/32) from one set of our Google over V6 resolvers and the usual
Google range I'm used to (2001:4860::/32) from another set of our resolvers.

Despite that, there's no noticeable difference to user experience (ie:
videos seem to play fine) so I guess that's the key factor here.

Anyway, some info below if it's any use:

Our main resolvers use anycast within our network, but when using the ones
in my local city (CBR - which query from 203.88.112.0/24):

IPv4:

$ dig +short v21.lscache1.l.google.com A
74.125.109.30

--- 74.125.109.30 ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 5.132/5.264/5.560/0.154 ms

And

traceroute to 74.125.109.30 (74.125.109.30), 64 hops max, 52 byte packets
 1  172.20.10.254 (172.20.10.254)  1.673 ms  1.064 ms  1.265 ms
 2  172.16.0.1 (172.16.0.1)  0.257 ms  0.164 ms  0.166 ms
 3  vl2.cor1.cbr1.as24557.net.au (203.88.112.252)  6.260 ms  9.195 ms  1.166
ms
 4  gi0-2-4.bdr2.cbr1.as24557.net.au (203.88.112.18)  0.582 ms  0.522 ms
0.468 ms
 5  gi0-2-4.bdr1.syd1.as24557.net.au (203.88.112.21)  5.492 ms  5.167 ms
5.044 ms
 6  as15169.sydney.pipenetworks.com (218.100.2.98)  5.106 ms  5.113 ms
5.287 ms
 7  64.233.174.253 (64.233.174.253)  5.515 ms  5.220 ms  5.738 ms
 8  74.125.109.30 (74.125.109.30)  5.210 ms  5.300 ms  5.384 ms

Vs

IPv6:

$ dig +short v21.lscache1.l.google.com AAAA
2a00:1450:4001:3::1e

--- 2a00:1450:4001:3::1e ping6 statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 351.175/354.353/355.477/1.600 ms

And

traceroute6 to 2a00:1450:4001:3::1e (2a00:1450:4001:3::1e) from
2405:5000:XX, 64 hops max, 12 byte packets
 1  2405:5000:XX  0.882 ms  0.766 ms  0.793 ms
 2  vl2-gw.cbr1.as24557.net.au  0.478 ms  0.389 ms  0.414 ms
 3  gi0-1-3.bdr2.cbr1.as24557.net.au  0.610 ms  0.541 ms  0.469 ms
 4  ge-0-0-0-700.bdr01.cbr01.act.vocus.net.au  0.714 ms  0.759 ms  0.699 ms
 5  2402:7800:0:2::35  4.757 ms  6.414 ms  4.866 ms
 6  ge-0-0-2.bdr02.syd01.nsw.vocus.net.au  4.922 ms  4.945 ms  4.758 ms
 7  2402:7800:0:2::3e  5.571 ms  11.963 ms  5.184 ms
 8  * * *
 9  * * *

And when querying our other set of resolvers in SYD (these query from
113.20.0.0/24):

IPv4:

$ dig +short v21.lscache1.l.google.com A
74.125.98.30

--- 74.125.98.30 ping statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 276.145/276.523/277.288/0.451 ms

And

traceroute to 74.125.98.30 (74.125.98.30), 64 hops max, 52 byte packets
 1  172.20.10.254 (172.20.10.254)  1.834 ms  1.065 ms  1.072 ms
 2  172.16.0.1 (172.16.0.1)  0.245 ms  0.169 ms  0.182 ms
 3  vl2.cor1.cbr1.as24557.net.au (203.88.112.252)  0.732 ms  0.801 ms  0.733
ms
 4  gi0-2-4.bdr2.cbr1.as24557.net.au (203.88.112.18)  0.668 ms  0.563 ms
0.522 ms
 5  gi0-2-4.bdr1.syd1.as24557.net.au (203.88.112.21)  5.993 ms  4.816 ms
4.714 ms
 6  as15169.sydney.pipenetworks.com (218.100.2.97)  5.656 ms  6.546 ms
5.921 ms
 7  66.249.95.234 (66.249.95.234)  6.634 ms  5.372 ms  5.466 ms
 8  209.85.249.52 (209.85.249.52)  108.913 ms  105.382 ms  105.407 ms
 9  209.85.255.34 (209.85.255.34)  107.364 ms  134.131 ms  107.195 ms
10  72.14.232.114 (72.14.232.114)  176.733 ms  177.158 ms  175.981 ms
11  209.85.242.233 (209.85.242.233)  181.669 ms  181.570 ms  181.603 ms
12  66.249.94.39 (66.249.94.39)  219.298 ms  220.909 ms
    209.85.242.235 (209.85.242.235)  182.338 ms
13  209.85.241.53 (209.85.241.53)  276.365 ms  278.211 ms  276.176 ms
14  66.249.94.90 (66.249.94.90)  219.789 ms
    216.239.43.215 (216.239.43.215)  351.971 ms
    66.249.94.90 (66.249.94.90)  219.523 ms
15  * * *
16  74.125.98.30 (74.125.98.30)  276.886 ms
    216.239.43.215 (216.239.43.215)  277.086 ms
    74.125.98.30 (74.125.98.30)  276.653 ms

vs

IPv6:

$ dig +short v21.lscache1.l.google.com AAAA
2001:4860:4001:402::1e

--- 2001:4860:4001:402::1e ping6 statistics ---
5 packets transmitted, 5 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 208.170/210.646/216.873/3.290 ms

And

traceroute6 to 2001:4860:4001:402::1e (2001:4860:4001:402::1e) from
2405:5000:XX, 64 hops max, 12 byte packets
 1  2405:5000:XX  1.301 ms  0.852 ms  1.014 ms
 2  vl2-gw.cbr1.as24557.net.au  0.582 ms  0.418 ms  0.464 ms
 3  gi0-1-3.bdr1.syd1.as24557.net.au  5.688 ms  5.097 ms  26.557 ms
 4  as15169.ipv6.sydney.pipenetworks.com  5.295 ms  8.224 ms  5.466 ms
 5  * * *
 6  * * *

:-)

-Shaun