Configuration de l'ipv6 chez OVH… c'est non trivial !
correct is: You get a /64 network, not a /56. Since you get the complete /64, the gw has to be outside this /64 range (else it wouldn't be complete).
To use this, you simply have to set 2 v6 routes:
- One to reach the default gw (ip -6 r a 2001:41d0:8:b9ff:ff:ff:ff:ff dev eth0)
- and one default route: ip -6 r a default via 2001:41d0:8:b9ff:ff:ff:ff:ff