freebsd-nq/usr.sbin/pim6sd/mtrace6/mtrace6.8
Yoshinobu Inoue 0fea3d5165 IPv6 multicast routing.
kernel IPv6 multicast routing support.
  pim6 dense mode daemon
  pim6 sparse mode daemon
  netstat support of IPv6 multicast routing statistics

  Merging to the current and testing with other existing multicast routers
  is done by Tatsuya Jinmei <jinmei@kame.net>, who writes and maintainances
  the base code in KAME distribution.

  Make world check and kernel build check was also successful.
2000-01-28 05:10:56 +00:00

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Groff

.\" Copyright (C) 1999 WIDE Project.
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.\" $Id: mtrace6.8,v 1.3 1999/09/12 17:03:18 jinmei Exp $
.\" $FreeBSD$
.\"
.Dd Sep 12, 1999
.Dt MTRACE6 8
.Os KAME
.Sh NAME
.Nm mtrace6
.Nd print IPv6 multicast path from a source to
a receiver
.Sh SYNOPSIS
.Nm
.Op Fl d Ar destination
.Op Fl g Ar gateway
.Op Fl h Ar hops
.Op Fl i Ar interface
.Op Fl m Ar maxhops
.Op Fl n
.Op Fl r Ar response_addr
.Op Fl w Ar waittime
.Ar source
.Ar group
.Sh DESCRIPTION
.Nm
utilizes a tracing feature implemented in multicast routers that is
accessed via an extension to the MLD protocol. A trace query is
passed hop-by-hop along the reverse path from the
.Ar destination
to the
.Ar source ,
collecting hop addresses, packet counts, and routing error conditions
along the path, and then the response is returned to the requestor.
.Sh OPTIONS
.Bl -tag -width Ds
.It Fl d Ar destination
Specifies the multicast receiver that the query wants to trace.
It is the host running
.Nm mtrace6
by default.
.It Fl g Ar gateway
Send the trace query via unicast directly to the multicast router
.Ar gateway .
The unicast router must be the last-hop router on the path from the
intended source to the receiver.
.Ar gateway
can also be a multicast address that the last hop router joins.
.It Fl h Ar hops
Set
.Ar hops
to the IPv6 hop limit field of query packets. The default is 64.
.It Fl i Ar interface
Specifies the local interface (on a multi-homed host) for sending
the trace query and as the default for the receiver and the response
destination.
.It Fl m Ar maxhops
Set to
.Ar maxhops
to the maximum number of hops that will be traced from the receiver
back toward the source. The default is 127 hops.
.It Fl n
Print hop addresses numerically rather than symbolically and numerically
(saves a nameserver address-to-name lookup for each router found on
the path).
.It Fl r Ar response_addr
Specify the host that the trace response sends to.
By default, the response will send to the host running
.Nm mtrace6 .
.It Fl w Ar waittime
Set the time to wait for a trace response to
.Ar waittime
seconds. The default is 3 seconds.
.El
.Sh SEE ALSO
.Xr pim6dd 8 ,
.Xr pim6sd 8 ,
.Xr mtrace 8
.Sh BUGS
Multicast trace for IPv6 is experimental. MLD types for query and
response, and packet format are not officially defined.
.Pp
.Ar waittime
specified by the
.Fl w
option is currently meaningless.
.Sh HISTORY
The
.Nm mtrace6
command first appeared in WIDE/KAME IPv6 protocol stack kit.