map-mbone
traverses neighboring multicast routers by sending the ASK_NEIGHBORS IGMP
message to the multicast starting_router. If this multicast router responds,
the version number and a list of their neighboring multicast router addresses is
part of that response. If the responding router has recent multicast version
number, then
map-mbone
requests additional information such as metrics, thresholds, and flags from the
multicast router. For each new occurrence of neighboring multicast router in
the reply and provided the flooding option has been selected, then
map-mbone
asks each of this multicast router for a list of neighbors. This search
for unique routers will continue until no new neighboring multicast routers
are reported.
"-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:
"-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.