NAME    [Toc]    [Back]

     mrinfo - displays configuration info from a multicast router

SYNOPSIS    [Toc]    [Back]

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

DESCRIPTION    [Toc]    [Back]

     mrinfo  attempts  to  display  the configuration information
from the specified
 multicast_router.

     mrinfo uses the ASK_NEIGHBORS IGMP message to the  specified
multicast
     router. If it 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 messages
 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    [Toc]    [Back]

     # 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 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 connection
 is displayed.

SEE ALSO    [Toc]    [Back]

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

AUTHORS    [Toc]    [Back]

     Van Jacobson

OpenBSD      3.6                            May      8,      1995