rtsol(1M)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | RETURN VALUES | FILES | SEE ALSO | BUGS

NAME

rtsold, rtsol- router solicitation daemon

SYNOPSIS

rtsold [-dDfm1] {interface...}
rtsol [-dD ] {interface...}

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 solicitation on the link destined to the link-local scope all-routers multicast address to discover new routers and to get non link-local addresses.

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 interfaces

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 IPv6 neighbor discovery specification, but is provided for mobile stations. 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 sends a router solicitation, and receives 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 its link-layer address.

Upon receipt of signal SIGUSR1, rtsold will dump the current internal state into /var/run/rtsold.dump .

OPTIONS

-d

Enable debugging

-D

Enable more debugging including to print internal timer information

-f

Prevent rtsold from becoming a daemon (foreground mode). Warning messages are generated to standard error output, instead of sysLog(2K) .

-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() .

-1

Perform only one probe. Transmit router solicitation packet until valid router advertisement packet arrives all the interfaces more than once, then exit.

RETURN VALUES

The program exits with 0 on success, non-zero on failures.

FILES

• /var/run/rtsold.pid - the pid of the current rtsold

• /var/run/rtsold.dump - internal state dump

SEE ALSO

sysctl(1M)

BUGS

In some operating systems, when a PCMCIA network card is removed and reinserted, the corresponding interface index is changed. However, rtsold does not assume such changes, 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.

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | RETURN VALUES | FILES | SEE ALSO | BUGS