Bon,
radvd semble configuré correctement, je recois des annonces, mais mon host ne monte pas l'ipv6 :s
root@osmc:~# tcpdump -i eth1 -vv ip6
tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 262144 bytes
16:34:25.602274 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 56) fe80::26a4:3cff:fe3c:c158 > ip6-allnodes: [icmp6 sum ok] ICMP6, router advertisement, length 56
hop limit 64, Flags [none], pref medium, router lifetime 0s, reachable time 0s, retrans time 0s
prefix info option (3), length 32 (4): 2a01:xxxx:xxxx:xxxx::/64, Flags [onlink, auto, router], valid time 2592000s, pref. time 604800s
0x0000: 40e0 0027 8d00 0009 3a80 0000 0000 2a01
0x0010: xxxx xxxx xxxx 0000 0000 0000 0000
source link-address option (1), length 8 (1): 24:a4:3c:3c:c1:58
0x0000: 24a4 3c3c c158
16:34:25.938988 IP6 (hlim 255, next-header ICMPv6 (58) payload length: 56) fe80::26a4:3cff:fe3c:c158 > ip6-allnodes: [icmp6 sum ok] ICMP6, router advertisement, length 56
hop limit 64, Flags [none], pref medium, router lifetime 1800s, reachable time 0s, retrans time 0s
prefix info option (3), length 32 (4): 2a01:xxxx:xxxx:xxxx::/64, Flags [onlink, auto, router], valid time 2592000s, pref. time 604800s
0x0000: 40e0 0027 8d00 0009 3a80 0000 0000 2a01
0x0010: xxxx xxxx xxxx 0000 0000 0000 0000
source link-address option (1), length 8 (1): 24:a4:3c:3c:c1:58
0x0000: 24a4 3c3c c158