Protocol Numbers

Posted on January 8, 2009 by Daniel Petri in Networking with

The Internet Protocol version 4 (IPv4) (RFC791) there is a field, called "Protocol", to identify the next level protocol. This is an 8 bit field. In Internet Protocol version 6 (IPv6) (RFC1883 and RFC2460) this field is called the "Next Header" field.

Protocol Numbers

  •  0 HOPOPT IPv6 Hop-by-Hop Option
  • 1 ICMP Internet Control Message
  • 2 IGMP Internet Group Management
  • 3 GGP Gateway-to-Gateway
  • 4 IP IP in IP (encapsulation)
  • 5 ST Stream
  • 6 TCP Transmission Control
  • 7 CBT CBT
  • 8 EGP Exterior Gateway Protocol
  • 9 IGP any private interior gateway (used by Cisco for their IGRP)
  • 10 BBN-RCC-MON BBN RCC Monitoring
  • 11 NVP-II Network Voice Protocol
  • 12 PUP PUP
  • 13 ARGUS ARGUS
  • 14 EMCON EMCON
  • 15 XNET Cross Net Debugger
  • 16 CHAOS Chaos
  • 17 UDP User Datagram
  • 18 MUX Multiplexing
  • 19 DCN-MEAS DCN Measurement Subsystems
  • 20 HMP Host Monitoring
  • 21 PRM Packet Radio Measurement
  • 22 XNS-IDP XEROX NS IDP
  • 23 TRUNK-1 Trunk-1
  • 24 TRUNK-2 Trunk-2
  • 25 LEAF-1 Leaf-1
  • 26 LEAF-2 Leaf-2
  • 27 RDP Reliable Data Protocol
  • 28 IRTP Internet Reliable Transaction
  • 29 ISO-TP4 ISO Transport Protocol Class 4
  • 30 NETBLT Bulk Data Transfer Protocol
  • 31 MFE-NSP MFE Network Services Protocol
  • 32 MERIT-INP MERIT Internodal Protocol
  • 33 SEP Sequential Exchange Protocol
  • 34 3PC Third Party Connect Protocol
  • 35 IDPR Inter-Domain Policy Routing Protocol
  • 36 XTP XTP
  • 37 DDP Datagram Delivery Protocol
  • 38 IDPR-CMTP IDPR Control Message Transport Proto
  • 39 TP++ TP++ Transport Protocol
  • 40 IL IL Transport Protocol
  • 41 IPv6 Ipv6
  • 42 SDRP Source Demand Routing Protocol
  • 43 IPv6-Route Routing Header for IPv6
  • 44 IPv6-Frag Fragment Header for IPv6
  • 45 IDRP Inter-Domain Routing Protocol
  • 46 RSVP Reservation Protocol
  • 47 GRE General Routing Encapsulation
  • 48 MHRP Mobile Host Routing Protocol
  • 49 BNA BNA
  • 50 ESP Encapsulating Security Payload
  • 51 AH Authentication Header
  • 52 I-NLSP Integrated Net Layer Security TUBA
  • 53 SWIPE IP with Encryption
  • 54 NARP NBMA Address Resolution Protocol
  • 55 MOBILE IP Mobility
  • 56 TLSP Transport Layer Security Protocol using Kryptonet key management
  • 57 SKIP SKIP
  • 58 IPv6-ICMP ICMP for IPv6
  • 59 IPv6-NoNxt No Next Header for IPv6
  • 60 IPv6-Opts Destination Options for IPv6
  • 61 any host internal protocol
  • 62 CFTP CFTP
  • 63 any local network
  • 64 SAT-EXPAK SATNET and Backroom EXPAK
  • 65 KRYPTOLAN Kryptolan
  • 66 RVD MIT Remote Virtual Disk Protocol
  • 67 IPPC Internet Pluribus Packet Core
  • 68 any distributed file system
  • 69 SAT-MON SATNET Monitoring
  • 70 VISA VISA Protocol
  • 71 IPCV Internet Packet Core Utility
  • 72 CPNX Computer Protocol Network Executive
  • 73 CPHB Computer Protocol Heart Beat
  • 74 WSN Wang Span Network
  • 75 PVP Packet Video Protocol
  • 76 BR-SAT-MON Backroom SATNET Monitoring
  • 77 SUN-ND SUN ND PROTOCOL-Temporary
  • 78 WB-MON WIDEBAND Monitoring
  • 79 WB-EXPAK WIDEBAND EXPAK
  • 80 ISO-IP ISO Internet Protocol
  • 81 VMTP VMTP
  • 82 SECURE-VMTP SECURE-VMTP
  • 83 VINES VINES
  • 84 TTP TTP
  • 85 NSFNET-IGP NSFNET-IGP
  • 86 DGP Dissimilar Gateway Protocol
  • 87 TCF TCF
  • 88 EIGRP EIGRP
  • 89 OSPFIGP OSPFIGP
  • 90 Sprite-RPC Sprite RPC Protocol
  • 91 LARP Locus Address Resolution Protocol
  • 92 MTP Multicast Transport Protocol
  • 93 AX.25 AX.25 Frames
  • 94 IPIP IP-within-IP Encapsulation Protocol
  • 95 MICP Mobile Internetworking Control Protocol
  • 96 SCC-SP Semaphore Communications Sec. Protocol
  • 97 ETHERIP Ethernet-within-IP Encapsulation
  • 98 ENCAP Encapsulation Header
  • 99 any private encryption scheme
  • 100 GMTP GMTP
  • 101 IFMP Ipsilon Flow Management Protocol
  • 102 PNNI PNNI over IP
  • 103 PIM Protocol Independent Multicast
  • 104 ARIS ARIS
  • 105 SCPS SCPS
  • 106 QNX QNX
  • 107 A/N Active Networks
  • 108 IPComp IP Payload Compression Protocol
  • 109 SNP Sitara Networks Protocol
  • 110 Compaq-Peer Compaq Peer Protocol
  • 111 IPX-in-IP IPX in IP
  • 112 VRRP Virtual Router Redundancy Protocol
  • 113 PGM PGM Reliable Transport Protocol
  • 114 any 0-hop protocol
  • 115 L2TP Layer Two Tunneling Protocol
  • 116 DDX D-II Data Exchange (DDX)
  • 117 IATP Interactive Agent Transfer Protocol
  • 118 STP Schedule Transfer Protocol
  • 119 SRP SpectraLink Radio Protocol
  • 120 UTI UTI
  • 121 SMP Simple Message Protocol
  • 122 SM SM
  • 123 PTP Performance Transparency Protocol
  • 124 ISIS over IPv4
  • 125 FIRE
  • 126 CRTP Combat Radio Transport Protocol
  • 127 CRUDP Combat Radio User Datagram
  • 128 SSCOPMCE
  • 129 IPLT
  • 130 SPS Secure Packet Shield
  • 131 PIPE Private IP Encapsulation within IP
  • 132 SCTP Stream Control Transmission Protocol
  • 133 FC Fibre Channel
  • 134 RSVP-E2E-IGNORE
  • 135-254 Unassigned
  • 255 Reserved

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