No subnet6 declaration for enp2s0 (2001:470:1f1a:5b3::2)

[Simon Hobson]

Patrik Laszlo <alabard at gmail.com> wrote:

> This is weird! I got IP4 DHCP, it works. But with IPV6 not working.
> 
> Do you know what it could be?
> ...
> iface enp2s0 inet6 static
>     metric 10
>     address 2001:470:1f1a:5b3::2
>     netmask 64
>     gateway 2001:470:1f1a:5b3::1
> 
> auto he-ipv6
> iface he-ipv6 inet6 v4tunnel
>         address 2001:470:1f1a:5b3::2
>         netmask 64
>         endpoint 216.66.87.14
>         local 192.168.78.20
>         ttl 255
>         gateway 2001:470:1f1a:5b3::1
> ...
> 
> DHCPD6
> 
> subnet6 2001:470:1f1b:5b3::/64 {
>         range6 2001:470:1f1b:5b3::50 2001:470:1f1b:5b3::ffff;
>         range6 2001:470:1f1b:5b3::/64 temporary;
>        option dhcp6.name-servers 2001:470:1f1a:5b3::2;
>        option dhcp6.domain-search "patrikx3.tk";
> } 
> SERVER

Typo in ethernet config ? You've used the prefix from the HE tunnel rather than the routed /64.
Easy to miss when you are staring at a screen and your eyes have gone square looking for the problem.