There are times where we need to test various address including the multi cast address.To find the multi cast address that was subscribed for the system we can use
[root@vx111a
local]# ip maddr
1: lo
inet
224.0.0.1
2: eth0
link
01:00:5e:00:00:fb
link
01:00:5e:00:00:01
inet
224.0.0.251
inet
224.0.0.1