d10910e6ce
IPv4 stack. Diffs are minimized against p4. PCS has been used for some protocol verification, more widespread testing of recorded sources in Group-and-Source queries is needed. sizeof(struct igmpstat) has changed. __FreeBSD_version is bumped to 800070.
134 lines
3.9 KiB
Groff
134 lines
3.9 KiB
Groff
.\" $KAME: ifmcstat.8,v 1.6 2002/10/31 04:23:43 suz Exp $
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.\"
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.\" Copyright (c) 2007-2009 Bruce Simpson.
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.\" Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the project nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd February 28, 2009
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.Dt IFMCSTAT 8
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.Os
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.Sh NAME
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.Nm ifmcstat
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.Nd dump multicast group management statistics per interface
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.Sh SYNOPSIS
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.Nm
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.Op Fl i Ar interface
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.Op Fl f Ar address-family
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.Op Fl v
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.Op Fl K
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.Op Fl M Ar core
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.Op Fl N Ar system
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.\"
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.Sh DESCRIPTION
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The
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.Nm
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command dumps multicast group information from the kernel.
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.Pp
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The following options are supported:
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.Bl -tag -width Fl
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.It Fl i Ar interface
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specifies the interface to be displayed.
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.Pp
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.It Fl f Ar address-family
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specifies the address family to be displayed;
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.Ar inet ,
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.Ar inet6
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and
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.Ar link
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are supported.
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.It Fl v
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specifies that link-layer memberships should be printed;
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they are suppressed by default.
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It may not be specified for
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.Fl f Ar link .
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Source lists for each group will also be printed.
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.Pp
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If specified twice, and
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.Xr kvm 3
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is in use, the IGMP timers for each interface
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and the IGMP source list counters for each group
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will also be printed.
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.El
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.Pp
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The following options are only available if
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.Nm
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has been built with support for
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.Xr kvm 3 :
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.Bl -tag -width Fl
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.It Fl K
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forces the use of
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.Xr kvm 3
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to be disabled.
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.It Fl M Ar core
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extracts values associated with the name list from the specified core,
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instead of the default
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.Pa /dev/kmem .
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.It Fl N Ar system
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extracts the name list from the specified kernel instead of the
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default, which is the kernel image the system has booted from.
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.El
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.Sh IMPLEMENTATION NOTES
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When run with the
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.Fl v
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option,
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.Nm
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may print multicast MAC addresses twice if they are
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referenced by a layer 3 protocol.
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.Pp
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When run with
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.Xr kvm 3
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support,
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the names of all interfaces configured in the system will be
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printed in the first column of output, even if no multicast
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group memberships are present on those interfaces.
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The output may also be slightly different, as the kernel
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data structures are being traversed with minimal post-processing
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of the output.
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.Pp
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When built without
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.Xr kvm 3
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support, the information displayed by
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.Nm
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is more limited.
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This support is recommended for debugging purposes.
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It requires super-user privilege if used to inspect a running kernel.
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.Pp
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The
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.Xr kvm 3
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back-end will be used by default if
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.Nm
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is run with super-user privileges, unless the
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.Fl K
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option is specified.
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.Sh SEE ALSO
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.Xr getifaddrs 3 ,
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.Xr getifmaddrs 3 ,
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.Xr kvm 3 ,
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.Xr netstat 8
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