1 .\" $KAME: ifmcstat.8,v 1.6 2002/10/31 04:23:43 suz Exp $
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38 .Nd dump multicast group management statistics per interface
42 .Op Fl f Ar address-family
51 command dumps multicast group information from the kernel.
53 The following options are supported:
56 specifies the interface to be displayed.
57 .It Fl f Ar address-family
58 specifies the address family to be displayed;
65 specifies that link-layer memberships should be printed;
66 they are suppressed by default.
67 It may not be specified for
69 Source lists for each group will also be printed.
71 If specified twice, and
73 is in use, the control plane timers for each interface
74 and the source list counters for each group
78 The following options are only available if
80 has been built with support for
86 to retrieve the multicast group information.
88 extracts values associated with the name list from the specified core,
89 instead of the default
92 extracts the name list from the specified kernel instead of the
93 default, which is the kernel image the system has booted from.
95 .Sh IMPLEMENTATION NOTES
97 will always print the embedded scope IDs of IPv6 multicast group
99 This is because memberships are always scoped to an interface.
105 may print multicast MAC addresses twice if they are
106 referenced by a layer 3 protocol.
111 the names of all interfaces configured in the system will be
112 printed in the first column of output, even if no multicast
113 group memberships are present on those interfaces.
114 The output may also be slightly different, as the kernel
115 data structures are being traversed with minimal post-processing
120 support, the information displayed by
123 This support is recommended for debugging purposes.
124 It requires super-user privilege if used to inspect a running kernel.