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

NAME
     mrinfo - Displays configuration info from a multicast router

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

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

     mrinfo  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  multicast  router  responds,  the
     configuration is displayed to the standard output.

INVOCATION
     "-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  mrinfo to terminate.	Non-zero debug levels have the following
     effects:

     level 1packet warnings are printed to stderr.

     level 2all level 1 messages plus notifications down networks are printed to
	    stderr.

     level 3all level 2 messages plus notifications of all packet  timeouts  are
	    printed to stderr.

     "-r retry_count" sets the neighbor query retry limit. Default is 3 retry.

     "-t  timeout_count" sets 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 treashold (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 dis-
     played.

IMPORTANT NOTE
     mrinfo must be run as root.

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

AUTHOR
     Van Jacobson

4.2 Berkeley Distribution					       MRINFO(8)
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