Internet Assigned Numbers Authority

                                                            Route Distinguisher Type Field

   Created
           2005-02-15

   Last Updated
           2015-05-15

   Note

 Route Distinguishers are used to create VPN-IPv4 addresses, as specified
 in [RFC4364]. The RDs are structured so that every service provider can
 administer its own "numbering space" (i.e., can make its own assignments
 of RDs), without conflicting with the RD assignmentsmade by any other
 service provider. An RD consists of three fields: a type field, an
 administrator field, and an assigned number field.

 The value of the type field determines the lengths of the other two fields,
 as well as the semantics of the administrator field. The administrator
 field identifies an assigned number authority, and the assigned number
 field contains a number which has been assigned, by the identified
 authority, for a particular purpose.


   Available Formats
           [IMG]
           XML [IMG]
           HTML [IMG]
           Plain text

   Registry included below

     * Route Distinguisher Type Field

Route Distinguisher Type Field

   Reference
           [RFC4364]

   Available Formats
           [IMG]
           CSV

      Range    Registration Procedures
   0-32767     First Come First Served
   32768-65535 IETF Review

   Type Value                         Description                         Reference
       0      Administrator field is a two-byte Autonomous System Number  [RFC4364]
       1      Administrator field is a four-byte IP Address               [RFC4364]
       2      Administrator field is a four-byte Autonomous System Number [RFC4364]
    3-65534   Unassigned
     65535    For Use Only in Certain Leaf A-D Routes                     [RFC7524]

   Licensing Terms