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

NAME
     mrinfo - displays configuration info from a multicast router

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

DESCRIPTION
     mrinfo attempts to display the configuration information from the speci-
     fied multicast_router.

     mrinfo uses the ASK_NEIGHBORS IGMP message to query the specified multi-
     cast 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:

     -d debug_level    sets the debug level.  When the debug level is greater
                       than the default value of 0, additional debugging mes-
                       sages 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 retry_count    sets the neighbor query retry limit.  The default is to
                       do 3 retries.

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

EXAMPLES
     # 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) 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 con-
     nection is displayed.

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

AUTHORS
     Van Jacobson

OpenBSD 4.7                      May 31, 2007                                1
