MAPOS - Multiple Access Protocol over SONET/SDH Version 1 (RFC2171)
Original Publication Date: 1997-Jun-01
Included in the Prior Art Database: 2000-Sep-13
Internet Society Requests For Comment (RFCs)
K. Murakami: AUTHOR [+2]
This document describes the protocol MAPOS, Multiple Access Protocol over SONET/SDH, for transmitting network-protocol datagrams over SONET/SDH. It focuses on the core protocol -- other documents listed in the bibliography may be referenced in conjunction with this document to provide support and services for protocols at higher layers.
Network Working Group K. Murakami
Request for Comments: 2171 M. Maruyama
Category: Informational NTT Laboratories
MAPOS - Multiple Access Protocol over SONET/SDH Version 1
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.
This memo documents a multiple access protocol for transmission of
network-protocol datagrams, encapsulated in High-Level Data Link
Control (HDLC) frames, over SONET/SDH. 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.
This document describes the protocol MAPOS, Multiple Access Protocol
over SONET/SDH, for transmitting network-protocol datagrams over
SONET/SDH. It focuses on the core protocol -- other documents listed
in the bibliography may be referenced in conjunction with this
document to provide support and services for protocols at higher
The Synchronous Optical Network/Synchronous Digital Hierarchy
(SONET/SDH)  family of ITU-T standard protocols are
designed to provide common, simple, and flexible interface for
broadband optical fiber transmission systems. It enables direct
octet-synchronous multiplexing of lower rate tributaries.
SONET/SDH-compliant transmission systems are widely deployed by
telephone carriers world wide.
This document defines the MAPOS protocol -- a method for transmitting
HDLC frames over SONET/SDH. The protocol provides multiple access
capability to SONET/SDH, an inherently point-to-point link. This
enables construction of seamless networking environment using
SONET/SDH as transmission media for both LAN and WAN.
1.2 Possible Configurations
The MAPOS protocol provides multiple access, broadcast / multicast-
capable switched LAN environment using SONET/SDH lines as
transmission media. Possible configurations of MAPOS system are
shown in the following diagrams. In (a), two end nodes are connected
to each other. Figure (b) shows a star-topology "SONET-LAN" where
multiple end nodes are connected to an HDLC frame switch. The frame
switch forwards packets between nodes and provides multiple access
capability. In (c), multiple frame switches are l...