Premier IT Outsourcing and Support Services within the UK

User Tools

Site Tools


Network Working Group Jon Postel RFC # 604 MITRE NIC # 21186 26 December 1973

                       Assigned Link Numbers

This announcement modifies the official host-to-host protocol, and updates the defining documents [NIC 8246, NIC 9347]. Please note that the information on page 28 of "Host/Host Protocol for the ARPA Network" about link number assignments is updated by this note, and that a previous update [RFC 317, NIC 9347] is completely replaced. The modification is minor and should have no effect on existing network programs or usage. Four of the reserved link numbers are hereby assigned for experimental use in the testing of an internetworking protocol defined by Kahn and Cerf.


  Control Link
      Link 0 is assigned for use as the host-to-host protocol control
  Data Links
      Links 2-71 are available for use in connections as provided by
      the host-to-host protocol.
  Internetworking Protocol
      Links 155-158 are to be used for experiments with the
      Internetworking Protocol.
      Links 159-191 are assigned for use in measurements under the
      direction of the Network Measurement Center at UCLA.
  Message Switching
      Links 192-195 are to be used for experiments with the Message
      Switching Protocol.
  Private Experiments
      Links 196-255 are available for private experimental use.

Postel [Page 1] RFC 604 Assigned Link Numbers December 1973

      Link 1, and links 72-154 are reserved for future developments
      and experiments and currently are not to be used.


      Link Number              Assignment
          0                    Control Link
          1                    Reserved
         2-71                  Connections
        72-154                 Reserved
       155-158                 Internetworking Protocol
       159-191                 Measurements
       192-195                 Message Switching Protocol
       196-255                 Experimental


      Host-to-host Protocol           NIC 8246
      Internetworking Protocol        NIC 18764
      Message Switching Protocol      NIC 9926
     [ This RFC was put into machine readable form for entry ]
     [ into the online RFC archives by Alex McKenzie with    ]
     [ support from GTE, formerly BBN Corp.            10/99 ]

Postel [Page 2]

/data/webs/external/dokuwiki/data/pages/rfc/rfc604.txt · Last modified: 2000/03/08 23:44 by

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki