Usage: mrinfo [-n?] [-i address] [-t secs] [-r retries] destination

-n Display IP addresses in numeric format
-i address Address of local interface to send query out
-t seconds Timeout in seconds for IGMP queries (default = 3 seconds)
-r retries Number of extra times to send the SNMP queries (default = 0)

-? Print Usage
destination Address or name of destination