NAME
rtsold
- router solicitation daemon
SYNOPSIS
rtsold
[-1Ddfm]
interface ...
rtsold
[-1Ddfm]
-a
rtsol
[-]
interface ...
rtsol
[-]
-a
DESCRIPTION
rtsold
is the daemon program to send ICMPv6 Router Solicitation messages
on the specified interfaces.
If a node (re)attaches to a link,
rtsold
sends some Router Solicitations on the link destined to the link-local scope
all-routers multicast address to discover new routers
and to get non link-local addresses.
rtsold
should be used on IPv6 hosts
(non-router nodes)
only.
If you invoke the program as
rtsol,
it will transmit probes from the specified
interface,
without becoming a daemon.
In other words,
rtsol
behaves as
``rtsold -f1 interface ...''.
Specifically,
rtsold
sends at most 3 Router Solicitations on an interface
after one of the following events:
-
Just after invocation of
rtsold
daemon.
-
The interface is up after a temporary interface failure.
rtsold
detects such failures by periodically probing to see if the status
of the interface is active or not.
Note that some network cards and drivers do not allow the extraction
of link state.
In such cases,
rtsold
cannot detect the change of the interface status.
-
Every 60 seconds if the
-m
option is specified and the
rtsold
daemon cannot get the interface status.
This feature does not conform to the IPv6 neighbor discovery
specification, but is provided for mobile stations.
The default interval for router advertisements, which is on the order of 10
minutes, is slightly long for mobile stations.
This feature is provided
for such stations so that they can find new routers as soon as possible
when they attach to another link.
Once
rtsold
has sent a Router Solicitation, and has received a valid Router Advertisement,
it refrains from sending additional solicitations on that interface, until
the next time one of the above events occurs.
When sending a Router Solicitation on an interface,
rtsold
includes a Source Link-layer address option if the interface
has a link-layer address.
Upon receipt of signal
SIGUSR1
,
rtsold
will dump the current internal state into
/var/run/rtsold.dump
.
Also note that
rtsold
will not be able to update the kernel routing tables unless
sysctl(8)
reports that
net.inet6.ip6.accept_rtadv=1.
The options are as follows:
- -1
-
Perform only one probe.
Transmit Router Solicitation packets until at least one valid Router
Advertisement packet has arrived on each
interface,
then exit.
- -a
-
Autoprobe outgoing interface.
rtsold
will try to find a non-loopback, non-point-to-point, IPv6-capable interface.
If
rtsold
finds multiple interfaces,
rtsold
will exit with error.
- -D
-
Enable more debugging (than that offered by the
-d
option) including the printing of internal timer information.
- -d
-
Enable debugging.
- -f
-
This option prevents
rtsold
from becoming a daemon (foreground mode).
Warning messages are generated to standard error
instead of
syslog(3).
- -m
-
Enable mobility support.
If this option is specified,
rtsold
sends probing packets to default routers that have advertised Router
Advertisements
when the node (re)attaches to an interface.
Moreover, if the option is specified,
rtsold
periodically sends Router Solicitation on an interface that does not support
SIOCGIFMEDIA
ioctl.
EXIT STATUS
FILES
/var/run/rtsold.pid
-
The PID of the currently running
rtsold.
/var/run/rtsold.dump
-
Internal state dump file.
SEE ALSO
rtadvd(8),
sysctl(8)
HISTORY
The
rtsold
command is based on the
rtsol
command, which first appeared in WIDE/KAME IPv6 protocol stack kit.
rtsol
is now integrated into
.
BUGS
In some operating systems, when a PCMCIA network card is removed
and reinserted, the corresponding interface index is changed.
However,
rtsold
assumes such changes will not occur, and always uses the index that
it got at invocation. As a result,
rtsold
may not work if you reinsert a network card.
In such a case,
rtsold
should be killed and restarted.
You may see kernel error messages if you try to autoconfigure a host with
multiple interfaces.