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

slaacda stateless address autoconfiguration 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 rtadvd(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), rtadvd(8), slaacctl(8)

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

J. Jeong, S. Park, L. Beloeil, and S. Madanapalli, IPv6 Router Advertisement Options for DNS Configuration, RFC 6106, November 2010.

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

The slaacd program first appeared in OpenBSD 6.2.

The slaacd program was written by Florian Obser <>.

September 14, 2017 OpenBSD-6.3