Is Virgin Media traffic shaping protocol 41 (6in4 IPv6)?

Virgin Media logo

Setting up the test

Testing methodology

Speed test result of Linode native IPv6

Testing the 6in4 IPv6 performance

[root@web ~]# curl -6 --interface eth0 http://ipv6.download.thinkbroadband.com/1GB.zip -o tb_1GB.zip
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1024M 100 1024M 0 0 64.4M 0 0:00:15 0:00:15 --:--:-- 63.1M
[root@web ~]# curl -6 --interface he-ipv6 http://ipv6.download.thinkbroadband.com/1GB.zip -o tb_1GB.zip
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1024M 100 1024M 0 0 77.3M 0 0:00:13 0:00:13 --:--:-- 87.3M
root@linksys-wrt3200acm:~# curl -4 http://ipv4.download.thinkbroadband.com/1GB.zip -o /dev/null
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1024M 100 1024M 0 0 13.1M 0 0:01:17 0:01:17 --:--:-- 13.2M
root@linksys-wrt3200acm:~# curl -6 http://ipv6.download.thinkbroadband.com/1GB.zip -o /dev/null
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1024M 100 1024M 0 0 1587k 0 0:11:00 0:11:00 --:--:-- 1657k
HTTP IPv6 speed test through Think Broadband on my Virgin Media connection

Bonus IPv6 test with Mullvad

root@linksys-wrt3200acm:/tmp# curl -6 --interface wg http://speedtest.tele2.net/1GB.zip -o /dev/null
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 1024M 100 1024M 0 0 11.5M 0 0:01:28 0:01:28 --:--:-- 11.2

iperf3 tests

Connecting to host bouygues.iperf.fr, port 5201
Reverse mode, remote host bouygues.iperf.fr is sending
[ 5] local 82.xx.xx.xxx port 38146 connected to 89.84.1.222 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 11.5 MBytes 96.8 Mbits/sec
[ 5] 1.00-2.00 sec 13.3 MBytes 112 Mbits/sec
[ 5] 2.00-3.00 sec 12.7 MBytes 106 Mbits/sec
[ 5] 3.00-4.00 sec 13.3 MBytes 112 Mbits/sec
[ 5] 4.00-5.00 sec 13.3 MBytes 112 Mbits/sec
[ 5] 5.00-6.00 sec 13.3 MBytes 112 Mbits/sec
[ 5] 6.00-7.00 sec 13.3 MBytes 112 Mbits/sec
[ 5] 7.00-8.00 sec 13.3 MBytes 112 Mbits/sec
[ 5] 8.00-9.00 sec 13.3 MBytes 112 Mbits/sec
[ 5] 9.00-10.00 sec 13.3 MBytes 112 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.05 sec 139 MBytes 116 Mbits/sec 4 sender
[ 5] 0.00-10.00 sec 131 MBytes 110 Mbits/sec receiver
iperf Done.
Connecting to host bouygues.iperf.fr, port 5201
Reverse mode, remote host bouygues.iperf.fr is sending
[ 5] local 2001:470:xxxx:xx::2 port 35558 connected to 2001:860:deff:1000::2 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 1.62 MBytes 13.6 Mbits/sec
[ 5] 1.00-2.00 sec 1.44 MBytes 12.1 Mbits/sec
[ 5] 2.00-3.00 sec 1.93 MBytes 16.2 Mbits/sec
[ 5] 3.00-4.00 sec 1.42 MBytes 11.9 Mbits/sec
[ 5] 4.00-5.00 sec 1.79 MBytes 15.0 Mbits/sec
[ 5] 5.00-6.00 sec 1.56 MBytes 13.1 Mbits/sec
[ 5] 6.00-7.00 sec 1.82 MBytes 15.2 Mbits/sec
[ 5] 7.00-8.00 sec 1.30 MBytes 10.9 Mbits/sec
[ 5] 8.00-9.00 sec 1.52 MBytes 12.8 Mbits/sec
[ 5] 9.00-10.00 sec 1.31 MBytes 11.0 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.08 sec 16.9 MBytes 14.1 Mbits/sec 58 sender
[ 5] 0.00-10.00 sec 15.7 MBytes 13.2 Mbits/sec receiver
iperf Done.
Reverse mode, remote host bouygues.iperf.fr is sending
[ 5] local fc00:bbbb:bbbb:bb01::1:611c port 34967 connected to 2001:860:deff:1000::2 port 5201
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 8.16 MBytes 68.5 Mbits/sec
[ 5] 1.00-2.00 sec 12.1 MBytes 101 Mbits/sec
[ 5] 2.00-3.00 sec 12.1 MBytes 101 Mbits/sec
[ 5] 3.00-4.00 sec 12.5 MBytes 105 Mbits/sec
[ 5] 4.00-5.00 sec 12.6 MBytes 105 Mbits/sec
[ 5] 5.00-6.00 sec 12.5 MBytes 105 Mbits/sec
[ 5] 6.00-7.00 sec 12.5 MBytes 105 Mbits/sec
[ 5] 7.00-8.00 sec 12.5 MBytes 105 Mbits/sec
[ 5] 8.00-9.00 sec 12.5 MBytes 105 Mbits/sec
[ 5] 9.00-10.00 sec 11.6 MBytes 97.1 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.06 sec 124 MBytes 104 Mbits/sec 2 sender
[ 5] 0.00-10.00 sec 119 MBytes 100 Mbits/sec receiver
iperf Done.

Possible theories on what could be happening

My personal thoughts on the issue

The real solution

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I'm a web developer, but also like writing about technical networking and security related topics, because I'm a massive nerd!

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James White

James White

I'm a web developer, but also like writing about technical networking and security related topics, because I'm a massive nerd!

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