Hi, My bad... I finally read more man pages about ip6, route, trying to understand their network topology...
New config for ovh ipv6 with a prefixlen 64. Example /etc/hosname.if : inet6 2607:5300:60:62ac:: 64 !route add -inet6 -net 2607:5300:60:62ff::/64 -cloning -link -iface ix0 !route add -inet6 default 2607:5300:60:62ff:ff:ff:ff:ff I ran with it from 2 days and test with a reboot today. All is up and works good. Dealing with a /56 config is a bad workaround as you will not be able to reach other /64 subnets in the /56. The NDP works fine now. If this can help other people using ovh dedicated hosts, Cheers,
