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: