diff --git a/share/man/man4/epair.4 b/share/man/man4/epair.4
--- a/share/man/man4/epair.4
+++ b/share/man/man4/epair.4
@@ -79,10 +79,19 @@
 Like any other Ethernet interface, an
 .Nm
 needs to have a network address.
-Each
+If the tunable
+.Va net.link.epair.ether_gen_addr Ns
+=0, each
 .Nm
-will be assigned a locally administered address by default,
+will be assigned a random locally administered address,
 that is only guaranteed to be unique within one network stack.
+The tunable
+.Va net.link.epair.ether_gen_addr Ns
+=1 will generate a stable MAC address with FreeBSD OUI using
+ether_gen_addr(9).
+This tunable defaults to 1 in
+.Fx 15.0 and might be removed in
+.Fx 16.0.
 To change the default addresses one may use the SIOCSIFADDR ioctl(2) or
 ifconfig(8) utility.
 .Pp