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
<draft-rfced-info-murakami-00.txt>
Status of this Memo
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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
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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