Re: schein.debian.org
Gerald Turner a écrit :
>
> Sorry about all that noise, I simply changed interfaces like:
>
> iface eth0 inet6 static
> address 2001:470:e861::8
> netmask 48
The network prefix length should always be 64, unless you know exactly
what you are doing.
> - gateway 2001:470:e861::1
> + up ip -6 route add 2000::/3 via 2001:470:e861::1 mtu 1480
Using 2000::/3 instead of default or ::/0 for the default global unicast
route was only necessary on very old (2.4 ?) kernels.
The MTU 1480 suggests that there is some 6in4 tunnel encapsulation on
the path and one node does not do its job properly. It could be either :
- the remote tunnel endpoint has IPv6 MTU set to 1480 but does not send
ICMPv6 "packet too big" when dropping too big a packet ;
- the server or a node before it drops ICMPv6 "packet too big" ;
- the remote tunnel endpoint has IPv6 MTU set to 1500 but does not
fragment properly 6in4 datagrams ;
- some node on the path drops 6in4 fragments ;
- the local tunnel endpoint does not reassemble properly 6in4 fragments
or many more causes.
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