RAD(8) | System Manager's Manual | RAD(8)

# NAME

`rad` — router advertisement daemon

# SYNOPSIS

`rad` | [`-dnv`] [`-f` file] [`-s` socket]

# DESCRIPTION

`rad` is an IPv6 router advertisement daemon. It periodically sends IPv6 router advertisement messages with prefix and default router information. Clients like slaacd(8) use these to configure IPv6 addresses on network interfaces and set default routes. Additionally it listens for IPv6 router solicitation messages and responds with router advertisements.

To have `rad` enabled at boot time, use “rcctl enable rad”, which sets

`rad_flags=""`

in rc.conf.local(8).

A running `rad` can be controlled with the ractl(8) utility.

The options are as follows:

`-d`
  Do not daemonize. If this option is specified, `rad` will run in the foreground and log to stderr.
`-f` file
  Specify an alternative configuration file.
`-n`
  Configtest mode. Only check the configuration file for validity.
`-s` socket
  Use an alternate location for the default control socket.
`-v`
  Produce more verbose output.

# FILES

/etc/rad.conf
  Default `rad` configuration file.
/var/run/rad.sock
  UNIX-domain socket used for communication with ractl(8).

# SEE ALSO

rad.conf(5), ractl(8), slaacd(8)

# STANDARDS

R. Draves and D. Thaler, Default Router Preferences and More-Specific Routes, RFC 4191, November 2005.

R. Hinden and S. Deering, IP Version 6 Addressing Architecture, RFC 4291, February 2006.

T. Narten, E. Nordmark, W. Simpson, and H. Soliman, Neighbor Discovery for IP version 6 (IPv6), RFC 4861, September 2007.

A. Yourtchenko and L. Colitti, Reducing Energy Consumption of Router Advertisements, RFC 7772, February 2016.

J. Jeong, S. Park, L. Beloeil, and S. Madanapalli, IPv6 Router Advertisement Options for DNS Configuration, RFC 8106, March 2017.

L. Colitti and J. Linkova, Discovering PREF64 in Router Advertisements, RFC 8781, April 2020.

# HISTORY

The `rad` program first appeared in OpenBSD 6.4.

# AUTHORS

The `rad` program was written by Florian Obser <florian@openbsd.org>.

October 15, 2022 | Debian