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- Network Working Group M. Maruyama
- Request for Comments: 2172 K. Murakami
- Category: Informational NTT Laboratories
- June 1997
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- MAPOS Version 1 Assigned Numbers
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- 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].
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- Maruyama & Murakami Informational [Page 1]
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- RFC 2172 MAPOS June 1997
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- 2. Protocol Field Assignments
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- 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".
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- Assigned MAPOS Protocol Numbers
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- 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
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- 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.
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- Maruyama & Murakami Informational [Page 2]
-
- RFC 2172 MAPOS June 1997
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- [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
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- Maruyama & Murakami Informational [Page 3]
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