OpenBSD manual page server

Manual Page Search Parameters

SLAACD(8) System Manager's Manual SLAACD(8)

slaacdStateless Address Autoconfiguration (SLAAC) daemon

slaacd [-dv] [-s socket]

slaacd is a stateless address autoconfiguration (SLAAC) daemon for clients. It listens for IPv6 router advertisement messages, for example those sent by rad(8), on interfaces with the flag set. slaacd derives IPv6 addresses and default routes from received router advertisements and installs them in the kernel. See hostname.if(5) and ifconfig(8) on how to enable auto configuration on an interface.

slaacd monitors network interface states (interface going up or down, auto configuration enabled or disabled etc.) and sends router solicitations when necessary.

A running slaacd can be controlled with the slaacctl(8) utility.

The options are as follows:

Do not daemonize. If this option is specified, slaacd will run in the foreground and log to .
Use an alternate location for the default control socket.
Produce more verbose output. Multiple -v options increase the verbosity.

UNIX-domain socket used for communication with slaacctl(8).

hostname.if(5), ifconfig(8), rad(8), slaacctl(8)

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.

F. Gont, A Method for Generating Semantically Opaque Interface Identifiers with IPv6 Stateless Address Autoconfiguration (SLAAC), RFC 7217, April 2014.

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

F. Gont, A. Cooper, D. Thaler, and W. Liu, Recommendation on Stable IPv6 Interface Identifiers, RFC 8064, February 2017.

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

F. Gont, S. Krishnan, T. Narten, and R. Draves, Temporary Address Extensions for Stateless Address Autoconfiguration in IPv6, RFC 8981, February 2021.

The slaacd program first appeared in OpenBSD 6.2.

The slaacd program was written by Florian Obser <>.

March 2, 2023 OpenBSD-7.4