(usagi-users 03649) Multicast on loopback

Hi all,

I have some problems when using multicast addresses on the loopback  
interface :

 > ping6 -I lo ff02::1
connect: Network is unreachable

On FreeBSD it works well :

 > ping6 -I lo0 ff02::1
PING6(56=40+8+8 bytes) fe80::1%lo0 --> ff02::1
16 bytes from fe80::1%lo0, icmp_seq=0 hlim=64 time=0.188 ms

This problem occurs with vanilla kernel and with the latest usagi-patch
I supposed fixing multicast routes on the loopback should fix it, but  
it does not work either :

 >  ip -f inet6 route add ff00::/8 dev lo
 >  ip -f inet6 route show | grep ff00
ff00::/8 dev eth1  metric 256  expires 21325134sec mtu 1500 advmss  
1440 metric 10 4294967295
ff00::/8 dev eth0  metric 256  expires 21325134sec mtu 1500 advmss  
1440 metric 10 4294967295
unreachable ff00::/8 dev lo  metric 1024  expires 21334349sec error  
-101 mtu 16436 advmss 16376 metric 10 4294967295

Does someone have a clue ?
I am actually trying to run the latest version of wide-dhcpv6 on the  
loopback interface.
-- 
Bruno STEVANT - Point6