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

NAME
     mrinfo -- display configuration info from a multicast router

SYNOPSIS
     mrinfo [-d debug_level] [-r retry_count] [-t timeout_count]
            multicast_router

DESCRIPTION
     The mrinfo utility attempts to display the configuration information from
     the multicast router multicast_router.

     The mrinfo utility uses the ASK_NEIGHBORS IGMP message to the specified
     multicast 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 a recent multicast version
     number, then mrinfo requests additional information such as metrics,
     thresholds, and flags from the multicast router.  Once the specified mul-
     ticast router responds, the configuration is displayed to the standard
     output.

     The following options are available:

     -d debug_level
             Set 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 mrinfo 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.

     -r retry_count
             Set the neighbor query retry limit.  Default is 3 retries.

     -t timeout_count
             Set the number of seconds to wait for a neighbor query reply.
             Default timeout is 4 seconds.

SAMPLE OUTPUT
     $ mrinfo mbone.phony.dom.net
     127.148.176.10 (mbone.phony.dom.net) [version 3.3]:
      127.148.176.10 -> 0.0.0.0 (?) [1/1/querier]
      127.148.176.10 -> 127.0.8.4 (mbone2.phony.dom.net) [1/45/tunnel]
      127.148.176.10 -> 105.1.41.9 (momoney.com) [1/32/tunnel/down]
      127.148.176.10 -> 143.192.152.119 (mbone.dipu.edu) [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), the 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 con-
     nection is displayed.

IMPORTANT NOTE
     The mrinfo utility must be run as root.

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

AUTHORS
     Van Jacobson

FreeBSD 6.0                       May 8, 1995                      FreeBSD 6.0