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MRINFO(8)            FreeBSD System Manager's Manual (smm)           MRINFO(8)

     mrinfo - displays configuration info from a multicast router

     mrinfo [-hn] [-d level] [-r count] [-t seconds] router

     mrinfo attempts to display the configuration information from the
     specified multicast capable router.

     mrinfo uses the ASK_NEIGHBORS IGMP message to query the specified
     multicast router.  If the router responds, the version number and a list
     of their neighboring multicast router addresses is part of the response.
     If the responding router has a recent multicast version number, then
     mrinfo requests additional information such as metrics, thresholds, and
     flags from the multicast router.  Once the specified multicast router
     responds, the configuration is displayed to the standard output.

     The options are as follows:

     -h                Print a help message and exit.

     -n                Use numerical address instead of a symbolic host name.

     -d level          sets the debug level.  When the debug level is greater
                       than the default value of 0, additional debugging
                       messages are printed.  Regardless of the debug level,
                       an error condition will always write an error message
                       and cause mrinfo to terminate.  Non-zero debug levels
                       have the following effects (printed to stderr):

                             1  packet warnings.
                             2  all level 1 messages plus notifications of
                                down networks.
                             3  all level 2 messages plus notifications of all
                                packet timeouts.

     -r count          sets the neighbor query retry count limit.  The default
                       is to do 3 retries.

     -t seconds        sets the timeout in number of seconds to wait for a
                       neighbor query reply.  The default timeout is 4

     # mrinfo ( [version 3.3]: -> (?) [1/1/querier] -> ( [1/45/tunnel] -> ( [1/32/tunnel/down] -> ( [1/32/tunnel]

     For each neighbor of the queried multicast router, the IP of the queried
     router is displayed, followed by the IP and name of the neighbor.  In
     square brackets the metric (cost of connection) and threshold (multicast
     ttl) is displayed.  If the queried multicast router has a newer version
     number, the type (tunnel, srcrt) and status (disabled, down) of the
     connection is displayed.

     map-mbone(8), mrouted(8), mtrace(8)

     Van Jacobson

FreeBSD 11.0-PRERELEASE          May 31, 2007          FreeBSD 11.0-PRERELEASE


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