INTERNET-DRAFT EXPIRES OCTOBER 1997 INTERNET-DRAFT Network Working Group M. Maruyama INTERNET-DRAFT K. Murakami Category: Informational NTT Laboratories April 1997 MAPOS Version 1 Assigned Numbers Status of this Memo This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet- Drafts as reference material or to cite them other than as ``work in progress.'' To learn the current status of any Internet-Draft, please check the ``1id-abstracts.txt'' listing contained in the Internet- Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or ftp.isi.edu (US West Coast). 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]. 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 Maruyama, Murakami [Page 1] INTERNET-DRAFT MAPOS Version 1 Assigned Numbers April 1997 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 3. Address Resolution Protocol Parameters This section explains the parameters for MAPOS ARP [8]. An implementation MUST provide an UNARP mechanism to flush obsolete ARP cache entries[8]. MAPOS ARP Assignments: Number Operation Code (op) ------ -------------------------- 1 REQUEST 2 REPLY 23 MAPOS-UNARP Number Hardware Type (hrd) ------ ----------------------------------- 25 MAPOS References [1] K. Murakami and M. Maruyama, "MAPOS - Multiple Access Protocol over SONET/SDH, Version 1," April 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] W. Simpson, editor, "PPP in HDLC-like Framing," RFC-1662, Maruyama, Murakami [Page 2] INTERNET-DRAFT MAPOS Version 1 Assigned Numbers April 1997 July 1994. [7] J. Postel, "Internet Protocol (IP)," RFC-791, September 1981. [8] K. Murakami and M. Maruyama, "IPv4 over MAPOS Version 1," April, 1997. [9] K. Murakami and M. Maruyama, "A MAPOS version 1 Extension - Node Switch Protocol," April, 1997. [10] K. Murakami and M. Maruyama, "A MAPOS version 1 Extension - Switch Switch Protocol," April, 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 [Page 3] INTERNET-DRAFT EXPIRES OCTOBER 1997 INTERNET-DRAFT