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93 lines
2.7 KiB
Groff
93 lines
2.7 KiB
Groff
.Dd March 31, 1995
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.Dt MRINFO 8
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.Sh NAME
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.Nm mrinfo
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.Nd displays 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 debuglevel
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.Op Fl r Ar retries
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.Op Fl t Ar timeout
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.Ar router
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.Sh DESCRIPTION
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The
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.Nm mrinfo
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program attempts to display the configuration information from the
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multicast router
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.Ar router .
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.Pp
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.Nm
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uses the
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.Dv ASK_NEIGHBORS
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.Tn IGMP
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message to the specified multicast router. If this multicast router
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responds, the version number and a list of their neighboring multicast
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router addresses is part of that response. If the responding router
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has a recent multicast version number, then
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.Nm mrinfo
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requests additional information such as metrics, thresholds, and flags
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from the multicast router. Once the specified multicast router
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responds, the configuration is displayed to the standard output.
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.Pp
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The
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.Nm
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program accepts the following options:
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.Bl -tag -width XXXdebuglevel
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.It Fl d Ar debuglevel
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This option sets the debug level to
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.Ar debuglevel .
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When the debug level is greater than the default value of 0, addition
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debugging messages are printed. Regardless of the debug level, an
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error condition, will always write an error message and will 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 "level 3"
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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 retries
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This option sets the neighbor query retry limit to
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.Ar retries .
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The default is three retries.
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.It Fl t Ar timeout
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This sets the number of seconds to wait for a neighbor query
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reply. The default timeout is four seconds.
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.El
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.Sh SAMPLE OUTPUT
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.Bd -literal
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# mrinfo 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
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queried router is displayed, followed by the IP and name of the
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neighbor. In square brackets the metric (cost of connection) and the
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threshold (minimum TTL to forward) are displayed. If the queried multicast
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router has a newer version number, the type (tunnel, srcrt) and status
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(disabled, down) of the connection are also displayed.
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.Sh RESTRICTIONS
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.Nm
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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 AUTHOR
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Pavel Curtis
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.Sh HISTORY
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An
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.Nm
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command first appeared in
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.Tn FreeBSD
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2.0.
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