Is this the correct behavior, or a bug? (seeing this in both FC2 as well as EL3) I wrote an application which registers itself in a couple IPv6 multicast groups on an ethernet interface. A "netstat -A inet6 -g" then shows the group membership, such as IPv6/IPv4 Group Memberships Interface RefCnt Group --------------- ------ --------------------- lo 1 ff02::1 eth0 1 ff02::eb42:8740 eth0 1 ff02::f6b6:d980 eth0 1 ff02::1:ff13:7276 eth0 1 ff02::1 If I then leave the application running, but do an "ifdown eth0" then "ifup eth0", I get this, IPv6/IPv4 Group Memberships Interface RefCnt Group --------------- ------ --------------------- lo 1 ff02::1 eth0 1 ff02::1:ff13:7276 eth0 1 ff02::1 Are group memberships supposed to be preserved across up/down cycling? If not, then what's the proper way for an application to detect that this has occurred so it can re-register? Note that the app can still successfully SEND packets to the group, but obviously, it no longer receives any packets. -- Deron Meranda
