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Synchronous Optical Network (SONET)/Synchronous Digital Hierarchy (SDH) Encoding for Link Management Protocol (LMP) Test Messages (RFC4207)

IP.com Disclosure Number: IPCOM000130547D
Original Publication Date: 2005-Oct-01
Included in the Prior Art Database: 2005-Oct-26
Document File: 16 page(s) / 30K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

J. Lang: AUTHOR [+2]

Abstract

This document details the Synchronous Optical Network (SONET)/Synchronous Digital Hierarchy (SDH) technology-specific information needed when sending Link Management Protocol (LMP) test messages.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 9% of the total text.

Network Working Group                                            J. Lang
Request for Comments: 4207                                   Sonos, Inc.
Category: Standards Track                               D. Papadimitriou
                                                                 Alcatel
                                                            October 2005


Synchronous Optical Network (SONET)/Synchronous Digital Hierarchy (SDH)
       Encoding for Link Management Protocol (LMP) Test Messages

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 (2005).

Abstract

   This document details the Synchronous Optical Network
   (SONET)/Synchronous Digital Hierarchy (SDH) technology-specific
   information needed when sending Link Management Protocol (LMP) test
   messages.

1.  Introduction

   For scalability purposes, multiple physical resources that
   interconnect Label Switching Routers (LSRs) can be combined to form a
   single traffic engineering (TE) link for the purposes of path
   computation and signaling.  These resources may represent one or more
   physical links that connect the LSRs, or they may represent a Label
   Switched Path (LSP) if LSP hierarchy [RFC4206] is used.  The
   management of TE links is not restricted to in-band messaging, but
   instead can be done using out-of-band techniques.

   The Link Management Protocol (LMP) [RFC4204] has been developed as
   part of the Generalized MPLS (GMPLS) protocol suite to manage TE
   links.  LMP currently consists of four main procedures, of which the
   first two are mandatory and the last two are optional:

Lang & Papadimitriou        Standards Track                     [Page 1]
RFC 4207        SONET/SDH Encoding for LMP Test Messages    October 2005


      1.  Control channel management
      2.  Link property correlation
      3.  Link verification
      4.  Fault management

   Control channel management is used to establish and maintain control
   channel connectivity between adjacent nodes.  This is done using a
   Config message exchange followed by a lightweight keep-alive message
   exchange.  Link property correlation is used to aggregate multiple
   data links into a single TE Link and to synchronize the link
   properties.  Link verification is used...