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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 time-
       out_count ] multicast_router

DESCRIPTION
       mrinfo attempts to display the configuration information	from the  mul-
       ticast 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  num-
       ber,  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 stan-
       dard 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. Re-
       gardless	of the debug level, an error condition,	will always  write  an
       error  message and will cause mrinfo to terminate.  Non-zero debug lev-
       els 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"	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	neigh-
       bor. 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 displayed.

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)

NAME | SYNOPSIS | DESCRIPTION | INVOCATION | SAMPLE OUTPUT | IMPORTANT NOTE | SEE ALSO | AUTHOR

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