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rfc:rfc2172

Network Working Group M. Maruyama Request for Comments: 2172 K. Murakami Category: Informational NTT Laboratories

                                                             June 1997
                  MAPOS Version 1 Assigned Numbers

Status of this Memo

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

Authors' Note

 This memo documents the parameters used in the Multiple Access
 Protocol over SONET/SDH Version 1.  This document is NOT the product
 of an IETF working group nor is it a standards track document.  It
 has not necessarily benefited from the widespread and in-depth
 community review that standards track documents receive.

Abstract

 This document describes the protocol parameters used in the Multiple
 Access Over SONET/SDH (MAPOS) version 1. MAPOS is a link layer
 protocol and provides multiple access capability over SONET/SDH
 links.

1. Introduction

 Multiple Access Protocol over SONET/SDH (MAPOS) [1] is a high-speed
 link-layer protocol that provides multiple access capability over
 SONET(Synchronous Optical Network)/SDH(Synchronous Digital
 Hierarchy)[2][3][4][5]. Its frame format is based on the HDLC-like
 framing [6] for PPP.  A component called "Frame Switch" [1] allows
 multiple nodes to be connected together in a star topology to form a
 LAN. Using long haul SONET/SDH links, the nodes on such a "SONET-LAN"
 can span over a wide geographical area. The Internet Protocol (IP)
 [7] datagrams are transmitted in MAPOS HDLC frames [8].
 This document describes the protocol parameters used in MAPOS version
 1 [1].

Maruyama & Murakami Informational [Page 1] RFC 2172 MAPOS June 1997

2. Protocol Field Assignments

 The MAPOS Version 1 Data Link Layer [1] contains a 16 bit Protocol
 field to identify the the encapsulated protocol.  The Protocol field
 is consistent with the ISO 3309 (HDLC) extension mechanism for
 address fields.  All protocol numbers MUST be assigned such that the
 least significant bit of the most significant octet equals "0", and
 the least significant bit of the least significant octet equals "1".
 Assigned MAPOS Protocol Numbers
    Value (in hex)  Protocol Name
    0001-001F       Not Used - reserved
    0021            MAPOS Version 1 Internet Protocol Version 4 [8]
    0023-FCFF       Not Used - reserved
    FE01            MAPOS Version 1 Address Resolution Protocol (ARP[8])
    FE03            MAPOS Version 1 Node Switch Protocol (NSP[9])
    FE05            MAPOS Version 1 Switch Switch Protocol (SSP[10])
    FE07-FEFF       Not Used - reserved

References

 [1]   Murakami, K. and M. Maruyama, "MAPOS - Multiple Access Protocol
       over SONET/SDH, Version 1," RFC-2171, June 1997.
 [2]   CCITT Recommendation G.707: Synchronous Digital Hierarchy Bit
       Rates (1990).
 [3]   CCITT Recommendation G.708: Network Node Interface for
       Synchronous Digital Hierarchy (1990).
 [4]   CCITT Recommendation G.709: Synchronous Multiplexing Structure
       (1990).
 [5]   American National Standard for Telecommunications - Digital
       Hierarchy - Optical Interface Rates and Formats Specification,
       ANSI T1.105-1991.
 [6]   Simpson, W., editor, "PPP in HDLC-like Framing," RFC-1662,
       July 1994.
 [7]   Postel, J., "Internet Protocol (IP)," RFC-791, September 1981.
 [8]   Murakami, K. and M. Maruyama, "IPv4 over MAPOS Version 1,"
       RFC-2176, June, 1997.

Maruyama & Murakami Informational [Page 2] RFC 2172 MAPOS June 1997

 [9]   Murakami, K. and M. Maruyama, "A MAPOS version 1 Extension -
       Node Switch Protocol," RFC-2173, June, 1997.
 [10]  Murakami, K. and M. Maruyama, "A MAPOS version 1 Extension -
       Switch Switch Protocol," RFC-2174, June, 1997.

Acknowledgements

 The authors would like to acknowledge the contributions and
 thoughtful suggestions of John P. Mullaney, Clark Bremer, Masayuki
 Kobayashi, Paul Francis, Toshiaki Yoshida, and Takahiro Sajima.

Author's Address

   Mitsuru Maruyama
   NTT Software Laboratories
   3-9-11, Midori-cho
   Musashino-shi
   Tokyo-180, Japan
   E-mail: mitsuru@ntt-20.ecl.net
   Ken Murakami
   NTT Software Laboratories
   3-9-11, Midori-cho
   Musashino-shi
   Tokyo-180, Japan
   E-mail: murakami@ntt-20.ecl.net

Maruyama & Murakami Informational [Page 3]

/data/webs/external/dokuwiki/data/pages/rfc/rfc2172.txt · Last modified: 1997/06/23 18:48 by 127.0.0.1

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