IPv6 to google working well here. Plus and Hangouts at least. posted via IPv6
Yeah. I don't think it's a global issue otherwise there'd be much more complaints. So might be something very specific to work's DHCP6 based architecture.
Good luck, hope you guys get it fixed.
90% of the time I experience random hanging with IPv6, it's an MTU or TCP MSS issue.
Ah. Jackpot. Thanks +Jeremy Visser, that seems to have done it. Tested with tracepath6 and eventually set it to 1460 (odd number) and can browse again. Now just need to hunt down who's blocking ICMPv6 messages.
Device MTU (so on Ethernet/L2) layer. Hence my confusion since it's not a MTU I've seen before. That would give a MSS of 1420 for TCP over IPv4 (not sure about IPv6 due to the extension headers). Usually PPPoE gives a MTU of 1492, but I'd not encountered one of 1460 (though apparently happens on some PPPoE ISPs). Really I have to find what on earth I'm connected to and more curiously why did it break over the last month! Will have to try a 13.10 live USB to try and rule out the distro upgrade.
Well being on Internode, I know that their standard recommendation is L2 MTU of 1492, IP MTU of 1460 and TCP MSS of 1420.
+David Coles The root cause is that the device with the MTU of 1460 is not doing TCP MSS clamping.
If it’s a Linux box, it’s a one-line change to iptables. (One-line change on Cisco, too.)