RFC 1365 (rfc1365) - Page 1 of 6

An IP Address Extension Proposal

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Network Working Group                                         K. Siyan
Request for Comments: 1365                   Siyan Consulting Services
                                                        September 1992


                    An IP Address Extension Proposal

Status of This Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard.  Distribution of this memo is
   unlimited.

Abstract

   This RFC suggests an extension to the IP protocol to solve the
   shortage of IP address problem, and requests discussion and
   suggestions for improvements.

1. Introduction and Background

   The Internet community has a well-developed, mature set of protocols
   that have been quite successful in providing network and transport
   services to users. However, because of the spectacular success of the
   TCP/IP protocols and the number of networks that desire connection to
   the Internet, there is a shortage of network numbers that can be
   assigned.

   The current network addressing scheme uses a 32-bit IP address that
   has a network part and a local address part.  The division between
   the network part and the local address part has been defined in terms
   of 5 address classes: class A, B, C, D, E.  Of these, only class A,
   B, C addresses are assigned to hosts. Class D is used for
   multicasting and class E is reserved.

   Class A has the highest order bit set to 0, a 7 bit network number
   and a 24 bit host address.

   Class B has the two higher order bits set to 10, a 14 bit network
   number and a 16 bit host address.

   Class C has the three higher order bit set to 110, a 21 bit network
   number and a 8 bit host address.

   Class D has the four higher order bits set to 1110.

   Class E has four higher address bits set to 1111.




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