Browse Prior Art Database

MAPOS/PPP Tunneling mode (RFC3186)

IP.com Disclosure Number: IPCOM000006126D
Original Publication Date: 2001-Dec-01
Included in the Prior Art Database: 2001-Dec-06
Document File: 15 page(s) / 27K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

S. Shimizu: AUTHOR [+4]

Abstract

This document specifies tunneling configuration over MAPOS (Multiple Access Protocol over SONET/SDH) networks. Using this mode, a MAPOS network can provide transparent point-to-point link for PPP over SONET/SDH (Packet over SONET/SDH, POS) without any additional overhead.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 13% of the total text.

Network Working Group                                         S. Shimizu

Request for Comments: 3186                                     T. Kawano

Category: Informational                                      K. Murakami

                                            NTT Network Innovation Labs.

                                                                E. Beier

                                                              DeTeSystem

                                                           December 2001

                        MAPOS/PPP Tunneling mode

Status of this Memo

   This memo provides information for the Internet community.  It does

   not specify an Internet standard of any kind.  Distribution of this

   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2001).  All Rights Reserved.

IESG Note

   This memo documents a way of tunneling PPP over Sonet over MAPOS

   networks.  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 specifies tunneling configuration over MAPOS (Multiple

   Access Protocol over SONET/SDH) networks.  Using this mode, a MAPOS

   network can provide transparent point-to-point link for PPP over

   SONET/SDH (Packet over SONET/SDH, POS) without any additional

   overhead.

1. Introduction

   MAPOS [1][2] frame is designed to be similar to PPP over SONET/SDH

   (Packet over SONET/SDH, POS)[3][4] frame (Figure 1).

Shimizu, et al.              Informational                      [Page 1]

RFC 3186                MAPOS/PPP Tunneling mode           December 2001

      a) MAPOS frame header (version 1)

         +-----------+-----------+-----------+-----------+

         | Address   | Control   | Protocol              |

         |  8 bits   | fixed,0x03| 16 bits               |

         +-----------+-----------+-----------+-----------+

      b) MAPOS frame header (MAPOS 16)

         +-----------+-----------+-----------+-----------+

         | Address               | Protocol              |

         |   16bits              | 16 bits               |

         +-----------+-----------+-----------+-----------+

      c) PPP frame header

         +-----------+-----------+-----------+-----------+

         | Address   | Control   | Protocol              |

         | fixed,0xFF| fixed,0x03| 16 bits               |

         +-----------+-----------+-----------+-----------+

      Figure 1. Header similarity of MAPOS frame and POS frame

   This means that a MAPOS network can easily carry POS frames with no

   additional header overhead by rewriting only 1 or 2 octets.  PPP

   tunneling configuration over MAPOS networks (MAPOS/PPP tunneling

   mode) provides for efficient L2 multiplexing by which users can share

   the cost of high speed long-haul links.

   This document specifies MAPOS/PPP tunneling mode.  In this mode, a

   MAPOS network provides a point-to-point link for those who intend to

   connect POS equipment.  Such link is established within a MAPOS

   switch, or between a pair of MAPOS switches that converts between POS

   header and MAPOS header for each L2 frame.

   Chapter 2 describes the specification in two parts.  First part is

   user network interface (UNI) specification and the second part is

   operation, administration, management and provisioning (OAM&P)

   description.  Other issues such as congestion avoidance, end-to-end

   fairness control are out of scope of this document.

   Implementation issues are discussed in Chapter 3.  Security

   considerations are noted in Chapter 4.

Shimizu, et al.              Informational                      [Page 2]

RFC 3186                MAPOS/PPP Tunneling mode           December 2001...