I have a 6RD tunnel set up on my Sonic-supported SR515ac router, using the instructions Sonic published at https://help.sonic.com/hc/en-us/article ... -IPv6-Tool, which had been working well for years.
Starting a couple of months ago, I noticed increasing delays retrieving web pages from hosts that are accessed via IPv6. If I turn off v6 on my Mac the pages are almost instantly retrievable via IPv4, but turn it back on and it's back to molasses.
Near as I can tell, it's taking a *looong* time to do the TLS handshake with the server, if it ever actually completes.
Is there some v6 performance issue in the way Sonic is connected to the world? I do not see this when doing the same test from other connection points on the net.
For example, from a non-Sonic host:
From my Sonic connected host:
and from the same host using IPv4:
Starting a couple of months ago, I noticed increasing delays retrieving web pages from hosts that are accessed via IPv6. If I turn off v6 on my Mac the pages are almost instantly retrievable via IPv4, but turn it back on and it's back to molasses.
Near as I can tell, it's taking a *looong* time to do the TLS handshake with the server, if it ever actually completes.
Is there some v6 performance issue in the way Sonic is connected to the world? I do not see this when doing the same test from other connection points on the net.
For example, from a non-Sonic host:
Code: Select all
% curl -6 'https://i.guim.co.uk/img/media/9037613144a28cb2df0d67bfc0c8f56318c7eab7/0_300_4600_2760/master/4600.jpg?width=620&quality=85&dpr=1&s=none' --output /tmp/foo.img
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 57507 100 57507 0 0 567k 0 --:--:-- --:--:-- --:--:-- 578k
Code: Select all
% curl -6 'https://i.guim.co.uk/img/media/9037613144a28cb2df0d67bfc0c8f56318c7eab7/0_300_4600_2760/master/4600.jpg?width=620&quality=85&dpr=1&s=none' --output /tmp/foo.img
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 0 0 0 0 0 0 0 --:--:-- 0:03:01 --:--:-- 0
curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to i.guim.co.uk:443
Code: Select all
% curl -4 'https://i.guim.co.uk/img/media/9037613144a28cb2df0d67bfc0c8f56318c7eab7/0_300_4600_2760/master/4600.jpg?width=620&quality=85&dpr=1&s=none' --output /tmp/foo.img
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 57507 100 57507 0 0 218k 0 --:--:-- --:--:-- --:--:-- 217k