88 lines
2.5 KiB
Groff
88 lines
2.5 KiB
Groff
.\" $FreeBSD$
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.\"
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.Dd May 8, 1995
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.Dt MRINFO 8
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.Os
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.Sh NAME
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.Nm mrinfo
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.Nd display configuration info from a multicast router
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.Sh SYNOPSIS
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.Nm mrinfo
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.Op Fl d Ar debug_level
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.Op Fl r Ar retry_count
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.Op Fl t Ar timeout_count
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.Ar multicast_router
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.Sh DESCRIPTION
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.Nm Mrinfo
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attempts to display the configuration information from the multicast router
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.Ar multicast_router .
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.Pp
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.Nm Mrinfo
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uses the ASK_NEIGHBORS IGMP message to the specified multicast router.
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If this
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multicast router responds, the version number and a list of their neighboring
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multicast router addresses is part of that response.
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If the responding router
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has a recent multicast version number, then
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.Nm
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requests additional information such as metrics, thresholds, and flags from the
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multicast router.
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Once the specified multicast router responds, the
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configuration is displayed to the standard output.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl d Ar debug_level
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Set the debug level.
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When the debug level is greater than the
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default value of 0, addition debugging messages are printed.
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Regardless of
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the debug level, an error condition, will always write an error message and will
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cause
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.Nm
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to terminate.
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Non-zero debug levels have the following effects:
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.Bl -tag -width indent
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.It "level 1"
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packet warnings are printed to stderr.
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.It "level 2"
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all level 1 messages plus notifications down networks are printed to stderr.
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.It "level 3"
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all level 2 messages plus notifications of all packet
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timeouts are printed to stderr.
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.El
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.It Fl r Ar retry_count
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Set the neighbor query retry limit.
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Default is 3 retries.
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.It Fl t Ar timeout_count
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Set the number of seconds to wait for a neighbor query
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reply.
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Default timeout is 4 seconds.
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.El
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.Sh SAMPLE OUTPUT
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.Bd -literal
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.Nm mrinfo Ar mbone.phony.dom.net
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127.148.176.10 (mbone.phony.dom.net) [version 3.3]:
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127.148.176.10 -> 0.0.0.0 (?) [1/1/querier]
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127.148.176.10 -> 127.0.8.4 (mbone2.phony.dom.net) [1/45/tunnel]
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127.148.176.10 -> 105.1.41.9 (momoney.com) [1/32/tunnel/down]
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127.148.176.10 -> 143.192.152.119 (mbone.dipu.edu) [1/32/tunnel]
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.Ed
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.Pp
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For each neighbor of the queried multicast router, the IP of the queried router
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is displayed, followed by the IP and name of the neighbor.
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In square brackets
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the metric (cost of connection), the treashold (multicast ttl) is displayed.
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If
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the queried multicast router has a newer version number, the type (tunnel,
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srcrt) and status (disabled, down) of the connection is displayed.
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.Sh IMPORTANT NOTE
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.Nm Mrinfo
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must be run as root.
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.Sh SEE ALSO
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.Xr map-mbone 8 ,
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.Xr mrouted 8 ,
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.Xr mtrace 8
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.Sh AUTHORS
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.An Van Jacobson
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