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.
58 .It Fl f Ar address-family
59 specifies the address family to be displayed;
66 specifies that link-layer memberships should be printed;
67 they are suppressed by default.
68 It may not be specified for
70 Source lists for each group will also be printed.
72 If specified twice, and
74 is in use, the control plane timers for each interface
75 and the source list counters for each group
79 The following options are only available if
81 has been built with support for
87 to retrieve the multicast group information.
89 extracts values associated with the name list from the specified core,
90 instead of the default
93 extracts the name list from the specified kernel instead of the
94 default, which is the kernel image the system has booted from.
96 .Sh IMPLEMENTATION NOTES
98 will always print the embedded scope IDs of IPv6 multicast group
100 This is because memberships are always scoped to an interface.
106 may print multicast MAC addresses twice if they are
107 referenced by a layer 3 protocol.
112 the names of all interfaces configured in the system will be
113 printed in the first column of output, even if no multicast
114 group memberships are present on those interfaces.
115 The output may also be slightly different, as the kernel
116 data structures are being traversed with minimal post-processing
121 support, the information displayed by
124 This support is recommended for debugging purposes.
125 It requires super-user privilege if used to inspect a running kernel.