INTEGER {hopopt(0),icmp(1),igmp(2),ggp(3),ipv4(4),st(5),tcp(6),cbt(7),egp(8),igp(9),bbn-rcc-mon(10),nvp-ii(11),pup(12),argus(13),emcon(14),xnet(15),chaos(16),udp(17),mux(18),dcn-meas(19),hmp(20),prm(21),xns-idp(22),trunk-1(23),trunk-2(24),leaf-1(25),leaf-2(26),rdp(27),irtp(28),iso-tp4(29),netblt(30),mfe-nsp(31),merit-inp(32),dccp(33),a3pc(34),idpr(35),xtp(36),ddp(37),idpr-cmtp(38),tp(39),il(40),ipv6(41),sdrp(42),ipv6-route(43),ipv6-frag(44),idrp(45),rsvp(46),gre(47),dsr(48),bna(49),esp(50),ah(51),i-nlsp(52),swipe(53),narp(54),mobile(55),tlsp(56),skip(57),ipv6-icmp(58),ipv6-nonxt(59),ipv6-opts(60),any-host(61),cftp(62),any-local(63),sat-expak(64),kryptolan(65),rvd(66),ippc(67),dist-fs(68),sat-mon(69),visa(70),ipcv(71),cpnx(72),cphb(73),wsn(74),pvp(75),br-sat-mon(76),sun-nd(77),wb-mon(78),wb-expak(79),iso-ip(80),vmtp(81),secure-vmtp(82),vines(83),ttp(84),nsfnet-igp(85),dgp(86),tcf(87),eigrp(88),ospf(89),sprite-rpc(90),larp(91),mtp(92),ax-25(93),ipip(94),micp(95),scc-sp(96),etherip(97),encap(98),priv-encypt(99),gmtp(100),ifmp(101),pnni(102),pim(103),aris(104),scps(105),qnx(106),a-n(107),ipcomp(108),snp(109),compaq-peer(110),ipx-in-ip(111),vrrp(112),pgm(113),any-0-hop(114),l2tp(115),ddx(116),iatp(117),stp(118),srp(119),uti(120),smp(121),sm(122),ptp(123),isis-o-ipv4(124),fire(125),crtp(126),crudp(127),sscopmce(128),iplt(129),sps(130),pipe(131),sctp(132),fc(133),rsvp-e2e-ignore(134),mobility-header(135),udplite(136),mpls-in-ip(137),manet(138),hip(139),shim6(140),wesp(141),rohc(142),exp-1(253),exp-2(254),reserved(255)}