Hello now that my IPv6/IPv4 works fine (thanks for your help), i would try renumbering my network.
to do so, i follow the usual steps : 1. i advertise the two prefixes -> 2 IPv6 adresses on my clients 2. i advertise the old prefix with AdvValidLifetime and AdvPreferredLifetime set to 0 3. I do not advertise anymore the old prefix At that state, is shouldn't have any adress with the old prefix on my hosts, but they are still present. Am i missing something, like an option in radvd.conf ? thanks Fred

