IPv6/IPv4 Group Memberships Interface RefCnt Group --------------- ------ --------------------- lo 1 ALL-SYSTEMS.MCAST.NET eth0 1 ALL-SYSTEMS.MCAST.NET lo 1 0:2ff::100:0 eth0 1 0:2ff::100:0:6b8e:754b eth0 2 0:2ff::100:0:6b8e:75ff eth0 1 0:2ff::100:0:6b8e:75fe eth0 1 0:2ff::100:0