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30 .\" $FreeBSD: src/usr.sbin/rtsold/rtsold.8,v 1.1.2.7 2003/03/11 22:31:33 trhodes Exp $
31 .\" $DragonFly: src/usr.sbin/rtsold/rtsold.8,v 1.4 2006/02/17 19:40:26 swildner Exp $
40 .Nd router solicitation daemon
59 utility is the daemon program to send ICMPv6 Router Solicitation messages
60 on the specified interfaces.
61 If a node (re)attaches to a link,
63 sends some Router Solicitations on the link destined to the link-local scope
64 all-routers multicast address to discover new routers
65 and to get non link-local addresses.
69 utility should be used on IPv6 hosts
73 If you invoke the program as
75 it will transmit probes from the specified
77 without becoming a daemon.
89 sends at most 3 Router Solicitations on an interface
90 after one of the following events:
94 Just after invocation of
98 The interface is up after a temporary interface failure.
101 utility detects such failures by periodically probing to see if the status
102 of the interface is active or not.
103 Note that some network cards and drivers do not allow the extraction
107 cannot detect the change of the interface status.
109 Every 60 seconds if the
111 option is specified and the
113 daemon cannot get the interface status.
114 This feature does not conform to the IPv6 neighbor discovery
115 specification, but is provided for mobile stations.
116 The default interval for router advertisements, which is on the order of 10
117 minutes, is slightly long for mobile stations.
118 This feature is provided
119 for such stations so that they can find new routers as soon as possible
120 when they attach to another link.
125 has sent a Router Solicitation, and has received a valid Router Advertisement,
126 it refrains from sending additional solicitations on that interface, until
127 the next time one of the above events occurs.
129 When sending a Router Solicitation on an interface,
131 includes a Source Link-layer address option if the interface
132 has a link-layer address.
134 Upon receipt of signal
137 will dump the current internal state into
138 .Pa /var/run/rtsold.dump .
141 .Bl -tag -width indent
143 Autoprobe outgoing interface.
147 will try to find a non-loopback, non-point-to-point, IPv6-capable interface.
150 finds multiple interfaces,
152 will exit with error.
157 Enable more debugging including the printing of internal timer information.
161 from becoming a daemon (foreground mode).
162 Warning messages are generated to standard error
166 Enable mobility support.
167 If this option is specified,
169 sends probing packets to default routers that have advertised Router
171 when the node (re)attaches to an interface.
172 Moreover, if the option is specified,
174 periodically sends Router Solicitation on an interface that does not support
178 Perform only one probe.
179 Transmit Router Solicitation packets until at least one valid Router
180 Advertisement packet has arrived on each
185 .Bl -tag -width /var/run/rtsold.dump -compact
186 .It Pa /var/run/rtsold.pid
187 the pid of the currently running
189 .It Pa /var/run/rtsold.dump
190 dumps internal state on.
194 .Ex -std rtsold rtsol
203 utility is based on the
205 utility, which first appeared in WIDE/KAME IPv6 protocol stack kit.
208 utility is now integrated into
212 In some operating systems, when a PCMCIA network card is removed
213 and reinserted, the corresponding interface index is changed.
216 assumes such changes will not occur, and always uses the index that
217 it got at invocation. As a result,
219 may not work if you reinsert a network card.
222 should be killed and restarted.
224 The IPv6 autoconfiguration specification assumes a single-interface host.
225 You may see kernel error messages if you try to autoconfigure a host with
227 Also, it seems contradictory for