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mrinfo(8)							    mrinfo(8)



NAME

  mrinfo - Displays configuration information from a multicast router

SYNOPSIS

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

OPTIONS

  -d  Sets the debug level. When the debug level is greater than 0 (the
      default),	additional debugging messages are printed. Regardless of the
      debug level, if an error condition occurs, mrinfo	writes an error	mes-
      sage and terminates.  Nonzero debug levels have the following effects:

      1	  Prints packet	warnings to stderr.

      2	  Prints all level 1 messages and notifications	of down	networks to
	  stderr.

      3	  Prints all level 2 messages and notifications	of all packet
	  timeouts to stderr.

  -r retry_count
      Specifies	the number of times to retry a neighbor	query.	The default
      is 3 retries.

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

DESCRIPTION

  The mrinfo command displays the configuration	information from the multi-
  cast router multicast_router.

  The mrinfo command sends the ASK_NEIGHBORS IGMP message to the specified
  multicast router.  If	the multicast router responds, the response includes
  the version number and a list	of addresses for their neighboring multicast
  routers.  If the responding router has a recent multicast version number,
  mrinfo requests additional information such as metrics, thresholds, and
  options from the multicast router.  Once the specified multicast router
  responds, the	configuration is displayed to the standard output.

RESTRICTIONS

  You must be superuser	in order to run	mrinfo.






EXAMPLES

  The following	example	shows the output of the	mrinfo command where
  mbone.phony.dom.net is specified as the multicast router:

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

SEE ALSO

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

  Networking: mbone.info(7)