NetBSD/usr.sbin/mld6query/mld6query.8

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.\" $NetBSD: mld6query.8,v 1.5 2000/12/04 07:04:37 itojun Exp $
.\" $KAME: mld6query.8,v 1.5 2000/12/04 06:28:23 itojun Exp $
.\"
.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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.Dd May 17, 1998
.Dt MLD6QUERY 8
.Os
.\"
.Sh NAME
.Nm mld6query
.Nd send multicast listener query
.\"
.Sh SYNOPSIS
.Nm
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.Op Fl dr
.Ar intface
.Op Ar maddr
.\"
.Sh DESCRIPTION
.Nm
sends an IPv6 multicast listener discovery (MLD) query packet toward
the specified multicast address,
.Ar maddr ,
toward interface
.Ar intface .
If you omit
.Ar maddr ,
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linklocal all nodes multicast address(ff02::1) is used.
.Pp
After sending a query,
.Nm
waits for replies for at most 10 seconds.
If a reply is returned,
.Nm
prints it with its type and then waits for another reply.
.Pp
This program is provided only for debugging.
It is not necessary for normal use.
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.Pp
With
.Fl d ,
.Nm
will transmit MLD done packet instead of MLD query packet.
With
.Fl r ,
similarly, MLD report packet will be transmitted.
.Fl dr
options are for debugging purposes only.
.\"
.Sh EXIT STATUS
The program exits 0 on success, and >0 on failures.
.\"
.\" .Sh SEE ALSO
.\"
.Sh HISTORY
The
.Nm
command first appeared in WIDE/KAME IPv6 protocol stack kit.
.Sh BUGS
.Nm
does not take care of multicast addresses which have non link-local
scope.