kuznet@alisa:~ $ ip maddr ls dummy
2: dummy
link 33:33:00:00:00:01
link 01:00:5e:00:00:01
inet 224.0.0.1 users 2
inet6 ff02::1
kuznet@alisa:~ $
The first line of the output shows the interface index and its name.
Then the multicast address list follows. Each line starts with the
protocol identifier. The word link denotes a link layer
multicast addresses.
If a multicast address has more than one user, the number
of users is shown after the users keyword.
One additional feature not present in the example above
is the static flag, which indicates that the address was joined
with ip maddr add. See the following subsection.