                                                     Address Resolution Protocol (ARP) Parameters

   Last Updated
           2009-04-24

   Note

 Reverse Address Resolution Protocol Operation Codes
 The Reverse Address Resolution Protocol (RARP) specified in [RFC903]
 uses the "Reverse" codes below.

 DYNAMIC REVERSE ARP
 The Dynamic Reverse Address Resolution Protocol (DRARP) uses the
 "DRARP" codes below.  For further information, see [RFC1931]

 INVERSE ADDRESS RESOLUTION PROTOCOL
 The Inverse Address Resolution Protocol (IARP) specified in [RFC1293]
 uses the "InARP" codes below.

   This registry is also available in XML and plain text formats.

   Registries included below

     * Operation Codes
     * Hardware Types
     * Protocol Type

Operation Codes

   Reference
           [RFC826][RFC5494]

   Registration Procedures
           IETF Review or IESG Approval

    Number   Operation Code (op)           References
      0     Reserved               [RFC5494]
      1     REQUEST                [RFC826][RFC5227]
      2     REPLY                  [RFC826][RFC5227]
      3     request Reverse        [RFC903]
      4     reply Reverse          [RFC903]
      5     DRARP-Request          [RFC1931]
      6     DRARP-Reply            [RFC1931]
      7     DRARP-Error            [RFC1931]
      8     InARP-Request          [RFC1293]
      9     InARP-Reply            [RFC1293]
      10    ARP-NAK                [RFC1577]
      11    MARS-Request           [Grenville_Armitage]
      12    MARS-Multi             [Grenville_Armitage]
      13    MARS-MServ             [Grenville_Armitage]
      14    MARS-Join              [Grenville_Armitage]
      15    MARS-Leave             [Grenville_Armitage]
      16    MARS-NAK               [Grenville_Armitage]
      17    MARS-Unserv            [Grenville_Armitage]
      18    MARS-SJoin             [Grenville_Armitage]
      19    MARS-SLeave            [Grenville_Armitage]
      20    MARS-Grouplist-Request [Grenville_Armitage]
      21    MARS-Grouplist-Reply   [Grenville_Armitage]
      22    MARS-Redirect-Map      [Grenville_Armitage]
      23    MAPOS-UNARP            [Mitsuru_Maruyama][RFC2176]
      24    OP_EXP1                [RFC5494]
      25    OP_EXP2                [RFC5494]
   26-65534 Unassigned
    65535   Reserved               [RFC5494]

Hardware Types

   Reference
           [RFC826][RFC5494]

                     Range                    Registration Procedure                                   Notes
   requests for values below 256              Expert Review
   requests for more than one value           Expert Review
   requests for one value greater than 255    First Come First Served
   requests for one value, no value specified First Come First Served can only be assigned a two-octet value (i.e., a value greater than 255)

    Number                Hardware Type (hrd)                                                     Reference
       0     Reserved                                      [RFC5494]
       1     Ethernet (10Mb)                               [Jon_Postel]
       2     Experimental Ethernet (3Mb)                   [Jon_Postel]
       3     Amateur Radio AX.25                           [Philip_Koch]
       4     Proteon ProNET Token Ring                     [Avri_Doria]
       5     Chaos                                         [Gill_Pratt]
       6     IEEE 802 Networks                             [Jon_Postel]
       7     ARCNET                                        [RFC1201]
       8     Hyperchannel                                  [Jon_Postel]
       9     Lanstar                                       [Tom_Unger]
      10     Autonet Short Address                         [Mike_Burrows]
      11     LocalTalk                                     [Joyce_K_Reynolds]
      12     LocalNet (IBM PCNet or SYTEK LocalNET)        [Joseph Murdock]
      13     Ultra link                                    [Rajiv_Dhingra]
      14     SMDS                                          [George_Clapp]
      15     Frame Relay                                   [Andy_Malis]
      16     Asynchronous Transmission Mode (ATM)          [[JXB2]]
      17     HDLC                                          [Jon_Postel]
      18     Fibre Channel                                 [RFC4338]
      19     Asynchronous Transmission Mode (ATM)          [RFC2225]
      20     Serial Line                                   [Jon_Postel]
      21     Asynchronous Transmission Mode (ATM)          [Mike_Burrows]
      22     MIL-STD-188-220                               [Herb_Jensen]
      23     Metricom                                      [Jonathan_Stone]
      24     IEEE 1394.1995                                [Myron_Hattig]
      25     MAPOS                                         [Mitsuru_Maruyama][RFC2176]
      26     Twinaxial                                     [Marion_Pitts]
      27     EUI-64                                        [Kenji_Fujisawa]
      28     HIPARP                                        [Jean_Michel_Pittet]
      29     IP and ARP over ISO 7816-3                    [Scott_Guthery]
      30     ARPSec                                        [Jerome_Etienne]
      31     IPsec tunnel                                  [RFC3456]
      32     InfiniBand (TM)                               [RFC4391]
      33     TIA-102 Project 25 Common Air Interface (CAI) [Jeff Anderson, Telecommunications Industry of America (TIA) TR-8.5 Formulating Group,
                                                           <cja015&motorola.com>, June 2004]
      34     Wiegand Interface                             [Scott_Guthery_2]
      35     Pure IP                                       [Inaky_Perez-Gonzalez]
      36     HW_EXP1                                       [RFC5494]
    37-255   Unassigned
      256    HW_EXP2                                       [RFC5494]
   257-65534 Unassigned
     65535   Reserved                                      [RFC5494]

Protocol Type

   Reference
           [RFC826][RFC5494][RFC5342]

   Note

 These numbers share the Ethertype space. See: <http://www.iana.org/assignments/ethernet-numbers>

   Registration Procedures
           The Ethertype space is administered as described in [RFC5342].

   Registry is empty.

                                                                        People

             ID                   Name                        Contact URI                 Last Updated
   [Andy_Malis]           Andy Malis           mailto:malis_a&timeplex.com
   [Avri_Doria]           Avri Doria           mailto:avri&peoteon.com                    1994-12
   [George_Clapp]         George Clapp         mailto:meritec!clapp&bellcore.bellcore.com
   [Gill_Pratt]           Gill Pratt           mailto:gill%25mit-ccc@mc.lcs.mit.edu
   [Grenville_Armitage]   Grenville Armitage   mailto:gja&thumper.belcore.com             1995-04
   [Herb_Jensen]          Herb Jensen          mailto:hwjensen&itt.com                    1995-02
   [Inaky_Perez-Gonzalez] Inaky Perez-Gonzalez mailto:inaky.perez-gonzalez&intel.com      2008-10-01
   [Jean_Michel_Pittet]   Jean-Michel Pittet   mailto:jmp&gandalf.engr.sgi.com            1998-11
   [Jerome_Etienne]       Jerome Etienne       mailto:jetienne&arobas.net                 2000-06
   [Jon_Postel]           Jon Postel           mailto:postel&isi.edu
   [Jonathan_Stone]       Jonathan Stone       mailto:jonathan&dsg.stanford.edu           1996-05
   [Joyce_K_Reynolds]     Joyce K. Reynolds    mailto:jkrey&isi.edu
   [Kenji_Fujisawa]       Kenji Fujisawa       mailto:fujisawa&sm.sony.co.jp              1998-10
   [Marion_Pitts]         Marion Pitts         mailto:marionp&vnet.ibm.com                1997-05
   [Mike_Burrows]         Mike Burrows         mailto:burrows&src.dec.com
   [Mitsuru_Maruyama]     Mitsuru Maruyama     mailto:mitsuru&ntt-20.ecl.net              1997-03
   [Myron_Hattig]         Myron Hattig         mailto:Myron_Hattig&ccm.jf.intel.com       1997-02
   [Philip_Koch]          Philip Koch          mailto:Philip.Koch&dartmouth.edu
   [Rajiv_Dhingra]        Rajiv Dhingra        mailto:rajiv&ultra.com
   [Scott_Guthery]        Scott Guthery        mailto:sguthery&mobile-mind.com            2000-03
   [Scott_Guthery_2]      Scott Guthery        mailto:sguthery&hidcorp.com                2008-09-25
   [Tom_Unger]            Tom Unger            mailto:tom&citi.umich
