# Tunnel Medium Type
VALUE Tunnel-Medium-Type IP 1
-VALUE Tunnel-Medium-Type X25 2
-VALUE Tunnel-Medium-Type ATM 3
-VALUE Tunnel-Medium-Type Frame-Relay 4
+VALUE Tunnel-Medium-Type IPv4 1
+VALUE Tunnel-Medium-Type IPv6 2
+VALUE Tunnel-Medium-Type NSAP 3
+VALUE Tunnel-Medium-Type HDLC 4
VALUE Tunnel-Medium-Type BBN-1822 5
VALUE Tunnel-Medium-Type IEEE-802 6
VALUE Tunnel-Medium-Type E.163 7