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98 lines
2.6 KiB
Groff
98 lines
2.6 KiB
Groff
.Dd March 31, 1995
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.Dt MAP-MBONE 8
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.Os FreeBSD 2.0
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.Sh NAME
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.Nm map-mbone
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.Nd multicast connection mapper
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.Sh SYNOPSIS
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.Nm map-mbone
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.Op Fl d Ar debuglevel
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.Op Fl f
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.Op Fl g
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.Op Fl n
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.Op Fl r Ar retries
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.Op Fl t Ar timeout
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.Op Ar router
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.Sh DESCRIPTION
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.Nm map-mbone
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attempts to display all multicast routers that are reachable from the multicast
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router
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.Ar router .
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If not specified on the command line, the default
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.Ar router
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is the local host.
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.Nm
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traverses neighboring multicast routers by sending the
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.Dv ASK_NEIGHBORS
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.Tn IGMP
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message to each router. If this multicast router responds, the version
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number and a list of their neighboring multicast router addresses is
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part of that response. If the responding router has recent multicast
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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. For each new occurrence of neighboring multicast router in
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the reply and provided the flooding option has been selected, then
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.Nm
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asks each of this multicast router for a list of neighbors. This search
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for unique routers will continue until no new neighboring multicast routers
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are reported.
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.Pp
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The options supported by
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.Nm
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are as follows:
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.Bl -tag -width XXXdebuglevel
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.It Fl d Ar debuglevel
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This 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,
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additional debugging messages are printed. Regardless of the debug
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level, an error condition, will always write an error message and will
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cause
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.I map-mbone
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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 f
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This option enables flooding. Flooding allows
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.Nm
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to perform recursive search
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of neighboring multicast routers and is enabled by default when an
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initial
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.Ar router
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is not specified.
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.It Fl g
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This option enables graphing in GraphEd format.
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.It Fl n
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This option disables the DNS lookup for the multicast routers' names.
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.It Fl r Ar retries
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This options sets the neighbor query retry limit to
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.Ar retries .
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The default is one retry.
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.It Fl t Ar timeout
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This option sets the number of seconds to wait for a neighbor query
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reply before retrying. The default timeout is two seconds.
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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 mrinfo 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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A
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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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