"-d" option sets the debug level. When the debug level is greater than the default value of 0, addition debugging messages are printed. Regardless of the debug level, an error condition, will always write an error message and will cause map-mbone to terminate. Non-zero debug levels have the following effects:
level 1
packet warnings are printed to stderr.
level 2
all level 1 messages plus notifications down networks are printed to stderr.
level 3
all level 2 messages plus notifications of all packet timeouts are printed to stderr.
"-f" option sets flooding option. Flooding allows the recursive search of neighboring multicast routers and is enable by default when starting_router is not used.
"-g" option sets graphing in GraphEd format.
"-n" option disables the DNS lookup for the multicast routers names.
"-r retry_count" sets the neighbor query retry limit. Default is 1 retry.
"-t timeout_count" sets the number of seconds to wait for a neighbor query reply before retrying. Default timeout is 2 seconds.