-> ip -6 link set vpn6 up mtu 1280 txqueuelen 1000
-> ip -6 addr add 2001:db8:beef::1/64 dev vpn6
-> ip -6 route add 2001:db8:beef::/48 dev vpn6
+> ip -6 link set $INTERFACE up mtu 1280 txqueuelen 1000
+> ip -6 addr add 2001:db8:beef::1/64 dev $INTERFACE
+> ip -6 route add 2001:db8:beef::/48 dev $INTERFACE