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Extending Point-to-Point Protocol (PPP) over Synchronous Optical NETwork/Synchronous Digital Hierarchy (SONET/SDH) with virtual concatenation, high order and low order payloads (RFC3255)

IP.com Disclosure Number: IPCOM000007735D
Original Publication Date: 2002-Apr-01
Included in the Prior Art Database: 2002-Apr-18
Document File: 9 page(s) / 14K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

N. Jones: AUTHOR [+2]

Abstract

This document describes an extension to the mapping of Point-to-Point Protocol (PPP) into Synchronous Optical NETwork/Synchronous Digital Hierarchy (SONET/SDH) to include the use of SONET/SDH SPE/VC virtual concatenation and the use of both high order and low order payloads.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 25% of the total text.

Network Working Group                                           N. Jones

Request for Comments: 3255                                 Agere Systems

Category: Standards Track                                      C. Murton

                                                         Nortel Networks

                                                              April 2002

    Extending Point-to-Point Protocol (PPP) over Synchronous Optical

     NETwork/Synchronous Digital Hierarchy (SONET/SDH) with virtual

            concatenation, high order and low order payloads

Status of this Memo

   This document specifies an Internet standards track protocol for the

   Internet community, and requests discussion and suggestions for

   improvements.  Please refer to the current edition of the "Internet

   Official Protocol Standards" (STD 1) for the standardization state

   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2002).  All Rights Reserved.

Abstract

   This document describes an extension to the mapping of Point-to-Point

   Protocol (PPP) into Synchronous Optical NETwork/Synchronous Digital

   Hierarchy (SONET/SDH) to include the use of SONET/SDH SPE/VC virtual

   concatenation and the use of both high order and low order payloads.

Table of Contents

   1.  Introduction................................................1

   2.  Rate Comparisons............................................2

   3.  Physical Layer Requirements.................................4

   4.  Standards Status............................................5

   5.  Security Considerations.....................................5

   6.  References..................................................6

   7.  Acknowledgements............................................6

   8.  Authors' Addresses..........................................7

   9.  Full Copyright Statement....................................8

1. Introduction

   Current implementations of PPP over SONET/SDH are required to select

   transport structures from the relatively limited number of

   contiguously concatenated signals that are available.

Jones & Murton              Standards Track                     [Page 1]

RFC 3255              Extending PPP over SONET/SDH            April 2002

   The only currently supported SONET/SDH SPE/VCs in RFC 2615 [3] are

   the following:

          SONET                   SDH

      ----------------------------------------

      STS-3c-SPE                  VC-4

      STS-12c-SPE                 VC-4-4c

      STS-48c-SPE                 VC-4-16c

      STS-192c-SPE                VC-4-64c

   Note that VC-4-4c and above are not widely supported in SDH networks

   at present.

   The use of virtual concatenation means that the right size SONET/SDH

   bandwidth can be selected for PPP links.

   For the convenience of the reader, the equivalent terms are listed

   below:

          SONET                   SDH

      ---------------------------------------------

      SPE                         VC

      VT (1.5/2/6)                Low order VC (VC-11/12/2)

      STS SPE                     Higher Order VC (VC-3/4/4-Nc)

      STS-1 frame                 STM-0 frame (rarely used)

      STS-1 SPE                   VC-3

      STS-1-nv                    VC-3-nv (virtual concatenation)

      STS-1 payload               C-3

      STS-3c frame                STM-1 frame, AU-4

      STS-3c SPE                  VC-4

      STS-3c-nv                   VC-4-nv (virtual concatenation)

      STS-3c payload              C-4

      STS-12c/48c/192c frame      STM-4/16/64 frame, AU-4-4c/16c/64c

      STS-12c/48c/192c-SPE        VC-4-4c/16c/64c

      STS-12c/48c/192c payload    C-4-4c/16c/64c

   This table is an extended version of the equivalent table in RFC 2615

   [3].  Additional information on...