rad(8) on OpenBSD
The text 03d7f1d651a4, as OpenBSD 7.2, OpenBSD 7.1, OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7 shipped it.
router advertisement daemon
Flags it lists
-
-d -
-f -
-n -
-s -
-v