MRINFO(8)                                               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  speci-
       fied  multicast router. If this multicast router responds,
       the version number and a list of their neighboring  multi-
       cast  router  addresses  is  part of that response. If the
       responding router has a recent multicast  version  number,
       then  mrinfo  requests additional information such as met-
       rics, thresholds, and flags  from  the  multicast  router.
       Once the specified multicast router responds, the configu-
       ration 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 1
              packet warnings are printed to stderr.

       level 2
              all  level  1 messages plus notifications down net-
              works 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]



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MRINFO(8)                                               MRINFO(8)


        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  dis-
       played.  If  the queried multicast router has a newer ver-
       sion number, the type (tunnel,  srcrt)  and  status  (dis-
       abled, 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



































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