+.It Va AddressFamily Li = ipv4 | ipv6 | any Po ipv4 Pc Bq experimental
+This option affects the address family of listening and outgoing sockets.
+If
+.Qq any
+is selected, then depending on the operating system both IPv4 and IPv6 or just
+IPv6 listening sockets will be created.
+.Pp
+Mixing IPv4 and IPv6 may not work as desired.
+It's best to choose one address family and use that for all tinc daemons on the VPN.