Simple Internet Protocol (SIP) Specification
RFC 8507

Document Type RFC - Historic (December 2018; No errata)
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Last updated 2018-12-21
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Independent Submission                                        S. Deering
Request for Comments: 8507                                       Retired
Category: Historic                                        R. Hinden, Ed.
ISSN: 2070-1721                                     Check Point Software
                                                           December 2018

              Simple Internet Protocol (SIP) Specification

Abstract

   This document is published for the historical record.  The Simple
   Internet Protocol was the basis for one of the candidates for the
   IETF's Next Generation (IPng) work that became IPv6.

   The publication date of the original Internet-Draft was November 10,
   1992.  It is presented here substantially unchanged and is neither a
   complete document nor intended to be implementable.

   The paragraph that follows is the Abstract from the original draft.

   This document specifies a new version of IP called SIP, the Simple
   Internet Protocol.  It also describes the changes needed to ICMP,
   IGMP, and transport protocols such as TCP and UDP, in order to work
   with SIP.  A companion document [SIP-ADDR] describes the addressing
   and routing aspects of SIP, including issues of auto-configuration,
   host and subnet mobility, and multicast.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for the historical record.

   This document defines a Historic Document for the Internet community.
   This is a contribution to the RFC Series, independently of any other
   RFC stream.  The RFC Editor has chosen to publish this document at
   its discretion and makes no statement about its value for
   implementation or deployment.  Documents approved for publication by
   the RFC Editor are not candidates for any level of Internet Standard;
   see Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8507.

Deering & Hinden                Historic                        [Page 1]
RFC 8507                     Simple IP (SIP)               December 2018

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.

Table of Contents

   1. Preface .........................................................3
   2. Introduction ....................................................3
   3. Terminology .....................................................4
   4. SIP Header Format ...............................................5
   5. Addresses .......................................................6
      5.1. Text Representation of Addresses ...........................6
      5.2. Unicast Addresses ..........................................6
      5.3. Multicast Addresses ........................................8
      5.4. Special Addresses ..........................................9
   6. Packet Size Issues .............................................12
   7. Source Routing Header ..........................................13
   8. Fragmentation Header ...........................................14
   9. Changes to Other Protocols .....................................16
      9.1. Changes to ICMP ...........................................16
      9.2. Changes to IGMP ...........................................20
      9.3. Changes to Transport Protocols ............................21
      9.4. Changes to Link-Layer Protocols ...........................22
   10. Security Considerations .......................................22
   11. Acknowledgments ...............................................23
   12. Informative References ........................................23
   Appendix A. SIP Design Rationale ..................................25
   Appendix B. Future Directions .....................................25
   Authors' Addresses ................................................26

Deering & Hinden                Historic                        [Page 2]
RFC 8507                     Simple IP (SIP)               December 2018

1.  Preface

   This document is published for the historical record.

   Simple IP (SIP) was the basis for one of the candidates for the
   IETF's Next Generation (IPng) work; see "The Recommendation for the
   IP Next Generation Protocol" [RFC1752].  The original 1992
   Internet-Draft describing SIP is published here as part of the record
   of that work.

   SIP evolved into SIP Plus [RFC1710], which was assessed as a
   candidate for IPng [RFC1752] and led eventually to the development of
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