1# $FreeBSD$ 2# Internet (IP) protocols 3ip 0 IP # internet protocol, pseudo protocol number 4icmp 1 ICMP # internet control message protocol 5igmp 2 IGMP # Internet Group Management 6tcp 6 TCP # transmission control protocol 7udp 17 UDP # user datagram protocol 8ipv6 41 IPV6 # ipv6 9gre 47 GRE # Generic Routing Encapsulation 10ah 51 AH # authentication header 11ospf 89 OSPFIGP # Open Shortest Path First IGP 12pim 103 PIM # Protocol Independent Multicast 13vrrp 112 VRRP # Virtual Router Redundancy Protocol 14pgm 113 PGM # PGM 15