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28 .\" $Id: rtadvd.8,v 1.1.1.1 1999/08/08 23:31:42 itojun Exp $
36 .Nd router advertisement daemon
39 .Op Fl c Ar configfile
45 advertises router advertisement packet to the specified
48 The program will daemonize itself on invocation.
49 Then, it will voluntarily send router advertisement packet periodically.
50 If a router solicitation packet from host has reached the program,
51 the program will respond by router advertisement packet.
53 For each interface, which is called advertising interface,
54 content of router advertisement can be described in
57 If there is no description for the interface in the configuration file
58 or if the configuration file does not exist,
60 sets all the parameters to their default values.
63 gets all the interface routes from the routing table and advertises
64 them as on-link prefixes.
67 watches the routing table.
68 By default, if an interface direct route is
69 added/deleted on an advertising interface,
71 adds/deletes the corresponding prefix to/from its advertising list,
73 If you do not want to enable this feature, you should specify the
75 command line option when advocation.
78 can also receive router renumbering packets, and can do router
79 renumbering for the system it runs on, as the contents of those
81 .Bl -tag -width indent
84 Specify an alternate location,
86 for the configuration file.
93 receives router renumbering messages.
94 Also, specifies IPsec policy for
96 Because router renumbering can change the system's
97 IPv6 prefix, its messages must be protected by IPsec.
103 .Xr ipsec_set_policy 3 .
110 Do not become daemon.
113 Do not watch the routing table.
116 The program exits with 0 on success, and non-zero on failures.
118 .Bl -tag -width /etc/rtadvd.conf -compact
119 .It Pa /etc/rtadvd.conf
120 The default configuration file.
129 command first appeared in WIDE Hydrangea IPv6 protocol stack kit.
131 Do not perform router advertisement toward upstream direction,
132 you should only advertise to downstream direction.
133 If you advertise toward upstream by mistake,
134 you will see icmp6 redirect storm on that subnet.
135 This is because of the specification,
136 which says that advertising router is assumed to become
137 the default outgoing router for end hosts in the subnet.