PROTOCOL NUMBERS
(last updated 2007-02-12)
In 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] this field
is called the "Next Header" field.
Assigned Internet Protocol Numbers
Decimal Keyword Protocol References
------- ------- -------- ----------
0 HOPOPT IPv6 Hop-by-Hop Option [RFC1883]
1 ICMP Internet Control Message [RFC792]
2 IGMP Internet Group Management [RFC1112]
3 GGP Gateway-to-Gateway [RFC823]
4 IP IP in IP (encapsulation) [RFC2003]
5 ST Stream [RFC1190,RFC1819]
6 TCP Transmission Control [RFC793]
7 CBT CBT [Ballardie]
8 EGP Exterior Gateway Protocol [RFC888,DLM1]
9 IGP any private interior gateway [IANA]
(used by Cisco for their IGRP)
10 BBN-RCC-MON BBN RCC Monitoring [SGC]
11 NVP-II Network Voice Protocol [RFC741,SC3]
12 PUP PUP [PUP,XEROX]
13 ARGUS ARGUS [RWS4]
14 EMCON EMCON [BN7]
15 XNET Cross Net Debugger [IEN158,JFH2]
16 CHAOS Chaos [NC3]
17 UDP User Datagram [RFC768,JBP]
18 MUX Multiplexing [IEN90,JBP]
19 DCN-MEAS DCN Measurement Subsystems [DLM1]
20 HMP Host Monitoring [RFC869,RH6]
21 PRM Packet Radio Measurement [ZSU]
22 XNS-IDP XEROX NS IDP [ETHERNET,XEROX]
23 TRUNK-1 Trunk-1 [BWB6]
24 TRUNK-2 Trunk-2 [BWB6]
25 LEAF-1 Leaf-1 [BWB6]
26 LEAF-2 Leaf-2 [BWB6]
27 RDP Reliable Data Protocol [RFC908,RH6]
28 IRTP Internet Reliable Transaction [RFC938,TXM]
29 ISO-TP4 ISO Transport Protocol Class 4 [RFC905,RC77]
30 NETBLT Bulk Data Transfer Protocol [RFC969,DDC1]
31 MFE-NSP MFE Network Services Protocol [MFENET,BCH2]
32 MERIT-INP MERIT Internodal Protocol [HWB]
33 DCCP Datagram Congestion Control Protocol [RFC-ietf-dccp-spec-11.txt]
34 3PC Third Party Connect Protocol [SAF3]
35 IDPR Inter-Domain Policy Routing Protocol [MXS1]
36 XTP XTP [GXC]
37 DDP Datagram Delivery Protocol [WXC]
38 IDPR-CMTP IDPR Control Message Transport Proto [MXS1]
39 TP++ TP++ Transport Protocol [DXF]
40 IL IL Transport Protocol [Presotto]
41 IPv6 Ipv6 [Deering]
42 SDRP Source Demand Routing Protocol [DXE1]
43 IPv6-Route Routing Header for IPv6 [Deering]
44 IPv6-Frag Fragment Header for IPv6 [Deering]
45 IDRP Inter-Domain Routing Protocol [Sue Hares]
46 RSVP Reservation Protocol [Bob Braden]
47 GRE General Routing Encapsulation [Tony Li]
48 DSR Dynamic Source Routing Protocol [RFC4728]
49 BNA BNA [Gary Salamon]
50 ESP Encap Security Payload [RFC2406]
51 AH Authentication Header [RFC2402]
52 I-NLSP Integrated Net Layer Security TUBA [GLENN]
53 SWIPE IP with Encryption [JI6]
54 NARP NBMA Address Resolution Protocol [RFC1735]
55 MOBILE IP Mobility [Perkins]
56 TLSP Transport Layer Security Protocol [Oberg]
using Kryptonet key management
57 SKIP SKIP [Markson]
58 IPv6-ICMP ICMP for IPv6 [RFC1883]
59 IPv6-NoNxt No Next Header for IPv6 [RFC1883]
60 IPv6-Opts Destination Options for IPv6 [RFC1883]
61 any host internal protocol [IANA]
62 CFTP CFTP [CFTP,HCF2]
63 any local network [IANA]
64 SAT-EXPAK SATNET and Backroom EXPAK [SHB]
65 KRYPTOLAN Kryptolan [PXL1]
66 RVD MIT Remote Virtual Disk Protocol [MBG]
67 IPPC Internet Pluribus Packet Core [SHB]
68 any distributed file system [IANA]
69 SAT-MON SATNET Monitoring [SHB]
70 VISA VISA Protocol [GXT1]
71 IPCV Internet Packet Core Utility [SHB]
72 CPNX Computer Protocol Network Executive [DXM2]
73 CPHB Computer Protocol Heart Beat [DXM2]
74 WSN Wang Span Network [VXD]
75 PVP Packet Video Protocol [SC3]
76 BR-SAT-MON Backroom SATNET Monitoring [SHB]
77 SUN-ND SUN ND PROTOCOL-Temporary [WM3]
78 WB-MON WIDEBAND Monitoring [SHB]
79 WB-EXPAK WIDEBAND EXPAK [SHB]
80 ISO-IP ISO Internet Protocol [MTR]
81 VMTP VMTP [DRC3]
82 SECURE-VMTP SECURE-VMTP [DRC3]
83 VINES VINES [BXH]
84 TTP TTP [JXS]
85 NSFNET-IGP NSFNET-IGP [HWB]
86 DGP Dissimilar Gateway Protocol [DGP,ML109]
87 TCF TCF [GAL5]
88 EIGRP EIGRP [CISCO,GXS]
89 OSPFIGP OSPFIGP [RFC1583,JTM4]
90 Sprite-RPC Sprite RPC Protocol [SPRITE,BXW]
91 LARP Locus Address Resolution Protocol [BXH]
92 MTP Multicast Transport Protocol [SXA]
93 AX.25 AX.25 Frames [BK29]
94 IPIP IP-within-IP Encapsulation Protocol [JI6]
95 MICP Mobile Internetworking Control Pro. [JI6]
96 SCC-SP Semaphore Communications Sec. Pro. [HXH]
97 ETHERIP Ethernet-within-IP Encapsulation [RFC3378]
98 ENCAP Encapsulation Header [RFC1241,RXB3]
99 any private encryption scheme [IANA]
100 GMTP GMTP [RXB5]
101 IFMP Ipsilon Flow Management Protocol [Hinden]
102 PNNI PNNI over IP [Callon]
103 PIM Protocol Independent Multicast [Farinacci]
104 ARIS ARIS [Feldman]
105 SCPS SCPS [Durst]
106 QNX QNX [Hunter]
107 A/N Active Networks [Braden]
108 IPComp IP Payload Compression Protocol [RFC2393]
109 SNP Sitara Networks Protocol [Sridhar]
110 Compaq-Peer Compaq Peer Protocol [Volpe]
111 IPX-in-IP IPX in IP [Lee]
112 VRRP Virtual Router Redundancy Protocol [RFC3768]
113 PGM PGM Reliable Transport Protocol [Speakman]
114 any 0-hop protocol [IANA]
115 L2TP Layer Two Tunneling Protocol [Aboba]
116 DDX D-II Data Exchange (DDX) [Worley]
117 IATP Interactive Agent Transfer Protocol [Murphy]
118 STP Schedule Transfer Protocol [JMP]
119 SRP SpectraLink Radio Protocol [Hamilton]
120 UTI UTI [Lothberg]
121 SMP Simple Message Protocol [Ekblad]
122 SM SM [Crowcroft]
123 PTP Performance Transparency Protocol [Welzl]
124 ISIS over IPv4 [Przygienda]
125 FIRE [Partridge]
126 CRTP Combat Radio Transport Protocol [Sautter]
127 CRUDP Combat Radio User Datagram [Sautter]
128 SSCOPMCE [Waber]
129 IPLT [Hollbach]
130 SPS Secure Packet Shield [McIntosh]
131 PIPE Private IP Encapsulation within IP [Petri]
132 SCTP Stream Control Transmission Protocol [Stewart]
133 FC Fibre Channel [Rajagopal]
134 RSVP-E2E-IGNORE [RFC3175]
135 Mobility Header [RFC3775]
136 UDPLite [RFC3828]
137 MPLS-in-IP [RFC4023]
138-252 Unassigned [IANA]
253 Use for experimentation and testing [RFC3692]
254 Use for experimentation and testing [RFC3692]
255 Reserved [IANA]
REFERENCES
----------
[CFTP] Forsdick, H., "CFTP", Network Message, Bolt Beranek and
Newman, January 1982.
[CISCO] Cisco Systems, "Gateway Server Reference Manual", Manual
Revision B, January 10, 1988.
[DDN] Feinler, E., Editor, "DDN Protocol Handbook", Network
Information Center, SRI International, December 1985.
[DGP] M/A-COM Government Systems, "Dissimilar Gateway Protocol
Specification, Draft Version", Contract no. CS901145,
November 16, 1987.
[ETHERNET] "The Ethernet, A Local Area Network: Data Link Layer and
Physical Layer Specification", AA-K759B-TK, Digital
Equipment Corporation, Maynard, MA. Also as: "The
Ethernet - A Local Area Network", Version 1.0, Digital
Equipment Corporation, Intel Corporation, Xerox
Corporation, September 1980. And: "The Ethernet, A Local
Area Network: Data Link Layer and Physical Layer
Specifications", Digital, Intel and Xerox, November 1982.
And: XEROX, "The Ethernet, A Local Area Network: Data Link
Layer and Physical Layer Specification", X3T51/80-50,
Xerox Corporation, Stamford, CT., October 1980.
[IEN90] Cohen, D. and J. Postel, "Multiplexing Protocol", IEN 90,
USC/Information Sciences Institute, May 1979.
[IEN119] Forgie, J., "ST - A Proposed Internet Stream Protocol",
IEN 119, MIT Lincoln Laboratory, September 1979.
[IEN158] Haverty, J., "XNET Formats for Internet Protocol Version 4",
IEN 158, October 1980.
[MFENET] Shuttleworth, B., "A Documentary of MFENet, a National
Computer Network", UCRL-52317, Lawrence Livermore Labs,
Livermore, California, June 1977.
[PUP] Boggs, D., J. Shoch, E. Taft, and R. Metcalfe, "PUP: An
Internetwork Architecture", XEROX Palo Alto Research Center,
CSL-79-10, July 1979; also in IEEE Transactions on
Communication, Volume COM-28, Number 4, April 1980.
[SPRITE] Welch, B., "The Sprite Remote Procedure Call System",
Technical Report, UCB/Computer Science Dept., 86/302,
University of California at Berkeley, June 1986.
[RFC741] Cohen, D., "Specifications for the Network Voice Protocol",
RFC 741, ISI/RR 7539, USC/Information Sciences Institute,
March 1976.
[RFC768] Postel, J., "User Datagram Protocol", STD 6, RFC 768,
USC/Information Sciences Institute, August 1980.
[RFC791] Postel, J., "Internet Protocol - DARPA Internet Prnogram
Protocol Specification", STD 5, RFC 791, DARPA, September
1981.
[RFC792] Postel, J., "Internet Control Message Protocol - DARPA
Internet Program Protocol Specification", STD 5, RFC 792,
USC/Information Sciences Institute, September 1981.
[RFC793] Postel, J., "Transmission Control Protocol - DARPA
Internet Program Protocol Specification", STD 7, RFC 793,
USC/Information Sciences Institute, September 1981.
[RFC823] Hinden, R., and A. Sheltzer, "The DARPA Internet Gateway",
RFC 823, BBN, September 1982.
[RFC869] Hinden, R., "A Host Monitoring Protocol", RFC 869,
Bolt Beranek and Newman, December 1983.
[RFC888] Seamonson, L., and E. Rosen, "STUB" Exterior Gateway
Protocol", RFC 888, BBN Communications Corporation,
January 1984.
[RFC905] International Standards Organization, "ISO Transport Protocol
Specification - ISO DP 8073", RFC 905, April 1984.
[RFC908] Velten, D., R. Hinden, and J. Sax, "Reliable Data Protocol",
RFC 908, BBN Communications Corporation, July 1984.
[RFC938] Miller, T., "Internet Reliable Transaction Protocol", RFC 938,
ACC, February 1985.
[RFC969] Clark, D., M. Lambert, and L. Zhang, "NETBLT: A Bulk Data
Transfer Protocol", RFC 969, MIT Laboratory for Computer
Science, December 1985.
[RFC1112] Deering, S., "Host Extensions for IP Multicasting",
STD 5, RFC 1112, Stanford University, August 1989.
[RFC1190] Topolcic, C., Editor, "Experimental Internet Stream
Protocol, Version 2 (ST-II)", RFC 1190, CIP Working Group,
October 1990.
[RFC1241] Woodburn, W., and D. Mills, " A Scheme for an Internet
Encapsulation Protocol: Version 1", RFC 1241, SAIC,
University of Delaware, July 1991.
[RFC1583] Moy, J., "The OSPF Specification", RFC 1583, Proteon,
March 1994.
[RFC1735] Heinanen, J., and R. Govindan, " NBMA Address Resolution
Protocol (NARP)", RFC 1735, Telecom Finland and USC/ISI,
December 1994.
[RFC1819] L. Delgrossi, L. Berger, and ST2 Working Group, "Internet
Stream Protocol Version 2 (ST2) Protocol Specification
- Version ST2+", RFC 1819, August 1995.
[RFC1883] Deering, S., and R. Hinden, "Internet Protocol, Version 6
(IPv6) Specification", RFC 1883, Xerox PARC, Ipsilon
Networks, December 1995.
[RFC2003] Perkins, C., "IP Encapsulation within IP", RFC 2003, IBM,
September 1996.
[RFC2393] Shacham, A., and R. Monsour, R. Pereira, M. Thomas, "IP
Payload Compression Protocol (IPComp)", RFC 2393, Cisco,
Hi/fn, TimeStep, AltaVista Internt, December 1998.
[RFC2402] S. Kent and R. Atkinson, "IP Authentication Header",
RFC 2402, November 1998.
[RFC2406] S. Kent and R. Atkinson, "IP Encapsulating Security Payload (ESP)",
RFC 2406, November 1998.
[RFC3175] F. Baker, C. Iturralde, F. Le Faucheur, B. Davie,
"Aggregation of RSVP for IPv4 and IPv6 Reservations",
RFC 3175, September 2001.
[RFC3378] R. Housley and S. Hollenbeck, "EtherIP: Tunneling Ethernet
Frames in IP Datagrams", RFC 3378, September 2002.
[RFC3692] T. Narten, "Assigning Experimental and Testing Numbers Considered
Useful", RFC 3692, January 2004.
[RFC3768] R. Hinden, Ed., "Virtual Router Redundancy Protocol (VRRP)",
RFC 3768, April 2004.
[RFC3775] D. Johnson, C. Perkins, and J. Arkko, "Mobility Support in IPv6",
RFC 3775, June 2004.
[RFC3828] L-A. Larzon, M. Degermark, S. Pink, L-E. Jonsson Ed., and
G. Fairhurst, Ed., "The UDP-Lite Protocol", RFC 3828, July 2004.
[RFC4023] T. Worster, Y. Rekhter, and E. Rosen, Ed., "Encapsulating MPLS in
IP or Generic Routing Encapsulation (GRE)", RFC 4023, March 2005.
[RFC-ietf-dccp-spec-11.txt]
E. Kohler, M. Handley and S. Floyd, "Datagram Congestion
Control Protocol (DCCP)", RFC XXXX, Month Year.
[RFC4728] D.B. Johnson, D.A. Maltz and Y-C. Hu, "The Dynamic Source Routing Protocol
for Mobile Ad Hoc Networks (DSR)", RFC 4728, February 2007.
PEOPLE
------
[Aboba] Bernard Aboba <bernarda@microsoft.com>, April 1998.
[Ballardie] Tony Ballardie <A.Ballardie@cs.ucl.ac.uk>
[BCH2] Barry Howard <Howard@NMFECC.LLNL.GOV>
[BK29] Brian Kantor <brian@UCSD.EDU>
[BN7] <mystery contact>
[Braden] Bob Braden, <braden@isi.edu>, July 1997.
[BWB6] Barry Boehm <boehm@ARPA.MIL>
[BXH] Brian Horn <---none--->
[BXW] Bruce Willins <---none--->
[Callon] Ross Callon, <rcallon@baynetworks.com>, December 1995.
[Carpenter] Brian Carpenter, <brian@dxcoms.cern.ch>, January 1995.
[Crowcroft] Jon Crowcroft <jon@cs.ucl.ac.uk>, June 1999.
[DDC1] David Clark <ddc@LCS.MIT.EDU>
[DLM1] David Mills <Mills@HUEY.UDEL.EDU>
[DRC3] Dave Cheriton <cheriton@PESCADERO.STANFORD.EDU>
[Deering] Steve Deering, <deering@parc.xerox.com>, March 1995.
[Doraswamy] Naganand Doraswamy, <naganand@BayNetworks.com>, September 1997.
[Durst] Robert Durst, <durst@mitre.org>, March 1997.
[DXE1] Deborah Estrin <estrin@usc.edu>
[Farinacci] Dino Farinacci, <dino@cisco.com>, March 1996.
[Feldman] Nancy Feldman <nkf@vnet.ibm.com> January 1997.
[DXF] Dirk Fromhein <df@watershed.com>
[DXM2] David Mittnacht <---none--->
[Ekblad] Leif Ekblad <leif.ekblad@eslov.mail.telia.com>, March 1999.
[GAL5] Guillermo A. Loyola <LOYOLA@IBM.COM>
[GLENN] K. Robert Glenn <glenn@osi.ncsl.nist.gov>
[GXC] Greg Chesson <Greg@SGI.COM>
[GXS] Guenther Schreiner <snmp-admin@ira.uka.de>
[GXT1] Gene Tsudik <tsudik@USC.EDU>
[Hamilton] Mark Hamilton <mah@spectralink.com>, November 1998.
[HCF2] Harry Forsdick <Forsdick@BBN.COM>
[Hinden] Bob Hinden, <hinden@ipsilon.com>, November 1995, 1997.
[Hunter] Michael Hunter, <mphunter@qnx.com>, July 1997.
[HWB] Hans-Werner Braun <HWB@MCR.UMICH.EDU>
[HXH] Howard Hart <hch@hybrid.com>
[IANA] Internet Assigned Numbers Authority, <iana@iana.org>, June 1995.
[JBP] Jon Postel <postel@isi.edu>
[JMP] Jean-Michel Pittet, <jmp@gandalf.engr.sgi.com>, November 1998.
[JC120] <mystery contact>
[JFH2] Jack Haverty <jhaverty@ORACLE.COM>
[JI6] John Ioannidis <ji@CS.COLUMBIA.EDU>
[JTM4] John Moy <jmoy@PROTEON.COM>
[JWF] Jim Forgie <FORGIE@XN.LL.MIT.EDU>
[JXS] Jim Stevens <Stevens@ISI.EDU>
[KATZ] Dave Katz <dkatz@cisco.com>
[Lee] CJ Lee, <cj_lee@novell.com>, October 1997.
[Lothberg] Peter Lothberg <roll@stupi.se>, March 1999.
[Markson] Tom Markson, <markson@osmosys.ingog.com>, September 1995.
[MB] Mike Brescia <Brescia@CCV.BBN.COM>
[MBG] Michael Greenwald <Greenwald@SCRC-STONY-BROOK.SYMBOLICS.COM>
[McIntosh] Bill McIntosh <BMcIntosh@fortresstech.com>
[ML109] Mike Little <little@MACOM4.ARPA>
[MTR] Marshall T. Rose <mrose@dbc.mtview.ca.us>
[Murphy] John Murphy <john.m.murphy@mci.com>, October 1998.
[MXS1] Martha Steenstrup <MSteenst@BBN.COM>
[NC3] J. Noel Chiappa <JNC@XX.LCS.MIT.EDU>
[Oberg] Christer Oberg <chg@bull.se> October 1994.
[Partridge] Criag Partridge <craig@bbn.com>, August 1999.
[Perkins] Charlie Perkins <perk@watson.ibm.com>, October 1994.
[Petri] Bernhard Petri <bernhard.petri@siemens.com>, March 2000.
[Presotto] Dave Presotto <presotto@plan9.att.com>, July 1995.
[Przygienda] Tony Przygienda <prz@siara.com>, August 1999.
[PXL1] Paul Liu <---none--->
[Rajagopal] Murali Rajagopal, <murali@gadzoox.com>, May 2000.
[RH6] Robert Hinden <Hinden@ENG.SUN.COM>
[RTB3] Bob Braden <braden@isi.edu>
[RC77] <mystery contact>
[RDH1] Russ Housley <rhousley@rsasecurity.com>
[RWS4] Robert W. Scheifler <RWS@XX.LCS.MIT.EDU>
[RXB3] Robert Woodburn <woody@cseic.saic.com>
[Sautter] Robert Sautter <rsautter@acdnj.itt.com>, August 1999.
[SAF3] Stuart A. Friedberg <stuart@CS.WISC.EDU>
[SC3] Steve Casner <casner@isi.edu
[SGC] Steve Chipman Chipman@F.BBN.COM>
[SHB] Steven Blumenthal <BLUMENTHAL@VAX.BBN.COM>
[Speakman] Tony Speakman <speakman@cisco.com>, January 1998.
[Sridhar] Manickam R.Sridhar <msridhar@sitaranetworks.com>, September 1997.
[Stewart] Randall R. Stewart <rrs@cisco.com>, April 2000.
[Sue Hares] Sue Hares <skh@merit.edu>
[SXA] Susie Armstrong <Armstrong.wbst128@XEROX.COM>
[SXD] Steve Deering <deering@PARC.XEROX.COM>
[Tony Li] Tony Li <tli@cisco.com>
[TXM] Trudy Miller <Trudy@ACC.COM>
[Volpe] Victor Volpe <vvolpe@smtp.microcom.com>, October 1997.
[VXD] Victor Dafoulas <---none--->
[Waber] Kurt Waber <kurt.waber@swisscom.com>, August 1999.
[Welzl] Michael Welzl <michael@tk.uni-linz.ac.at>, August 1999.
[WM3] William Melohn <Melohn@SUN.COM>
[WXC] Wesley Craig <Wesley.Craig@terminator.cc.umich.edu>
[Worley] John Worley <worley@milehigh.net>, June 1998.
[ZSU] Zaw-Sing Su <ZSu@TSCA.ISTC.SRI.>
[]