TDM Transport over MPLS Using AAL1 Technical Specification IP/MPLS Forum 4.1.0 IP/MPLS Forum Technical Committee July 2008 TDM Transport over MPLS using AAL1 Technical Specification IP/MPLS Forum 4.1.0 Note: The user’s attention is called to the possibility that implementation of the IP/MPLS Forum Technical Specification contained herein may require the use of inventions covered by patent rights held by third parties. By publication of this IP/MPLS Forum Technical Specification the IP/MPLS Forum makes no representation that the implementation of the specification will not infringe on any third party rights. The IP/MPLS Forum take no position with respect to any claim that has been or may be asserted by any third party, the validity of any patent rights related to any such claims, or the extent to which a license to use any such rights may not be available. Editor: Ron Insler Rad Data Communication For more information contact: The IP/MPLS Forum 48377 Fremont Blvd., Suite 117 Fremont, CA 94538 Phone: +1-510-492-4056 Fax: +1-510-492-4001 E-mail: [email protected] WWW: http://www.ipmplsforum.org/ Full Notice Copyright © 2008 IP/MPLS Forum. All rights reserved. This document and translations of it may be copied and furnished to others, and works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the IP/MPLS Forum, except as needed for the purpose of developing MPLS Technical Specifications (in which case the procedures copyrights defined by the IP/MPLS Forum must be followed), or as required to translate it into languages other than English. This document and the information contained herein is provided on an "AS IS" basis and THE IP/MPLS FORUM DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. July 2008 ii TDM Transport over MPLS using AAL1 Technical Specification IP/MPLS Forum 4.1.0 Table of Contents 1 INTRODUCTION............................................................................................................................................... 1 1.1 PURPOSE ............................................................................................................................................................. 1 1.2 SCOPE & OVERVIEW ........................................................................................................................................... 1 1.3 DEFINITIONS ....................................................................................................................................................... 1 1.4 ACRONYMS ......................................................................................................................................................... 3 1.5 REFERENCES ....................................................................................................................................................... 4 1.5.1 Normative .......................................................................................................................................... 4 1.5.2 Informative......................................................................................................................................... 5 2 TDM AND MPLS NETWORK INTERWORKING REQUIREMENTS .................................................... 6 3 PROTOCOL STACK AND FRAME FORMAT ............................................................................................ 6 3.1 TDM-MPLS FRAME FORMAT............................................................................................................................. 6 3.2 TDM-MPLS CONTROL WORD FORMAT ............................................................................................................. 7 3.3 OPTIONAL TIMING INFORMATION ....................................................................................................................... 8 4 TDM-MPLS PAYLOAD ................................................................................................................................... 8 5 GENERAL REQUIREMENTS ...................................................................................................................... 11 5.1 QUALITY OF SERVICE........................................................................................................................................ 11 5.2 JITTER AND PACKET LOSS................................................................................................................................. 12 5.3 ALARMS AND INDICATION HANDLING .............................................................................................................. 12 6 TDM-MPLS FRAME PROCESSING ........................................................................................................... 13 6.1 GENERATING TDM-MPLS FRAMES ................................................................................................................. 13 6.1.1 Setting the sequence number ........................................................................................................... 13 6.1.2 Generating the L, M and R bits........................................................................................................ 14 6.1.3 Setting the Length Field................................................................................................................... 15 6.2 GENERATING THE MPLS AND PW LABELS....................................................................................................... 15 6.3 GENERATING THE OPTIONAL RTP HEADER ...................................................................................................... 15 6.4 RECEIVING TDM-MPLS FRAMES..................................................................................................................... 16 6.4.1 Processing the sequence number ..................................................................................................... 16 6.5 HANDLING THE L, M AND R BITS ...................................................................................................................... 17 7 CLOCK RECOVERY...................................................................................................................................... 18 8 TDM-MPLS OPERATION ............................................................................................................................. 18 8.1 PW FEC FOR SETUP OF TDM PWS................................................................................................................... 19 8.2 INTERFACE PARAMETERS FOR TDM PWS......................................................................................................... 19 8.2.1 Number of TDMoMPLS AAL1 cells per packet (0x0E)................................................................. 19 8.2.2 TDMoMPLS AAL1 mode (0x10).................................................................................................... 19 8.2.3 CEP/TDM bit rate (0x07) ................................................................................................................ 19 8.2.4 TDM Options (0x0B)....................................................................................................................... 20 8.3 LDP STATUS CODES ......................................................................................................................................... 21 8.3.1 Incompatible bit rate: ....................................................................................................................... 21 8.3.2 CEP/TDM mis-configuration:.......................................................................................................... 21 8.4 TDMOMPLS CONFIGURATIONS ....................................................................................................................... 22 8.4.1 TDMoMPLS Defects and impairments............................................................................................ 23 8.4.2 TDMoMPLS Statistics counters ...................................................................................................... 24 9 TDM SERVICES ............................................................................................................................................. 24 July 2008 iii TDM Transport over MPLS using AAL1 Technical Specification IP/MPLS Forum 4.1.0 10 TDM ATM SERVICE INTERWORKING.................................................................................................. 26 11 ATM PW COMPATIBILITY MODE.......................................................................................................... 27 Revision History Version Change Date MPLS and Frame Initial version April 2003 Relay Alliance 4.0 IP/MPLS Forum Alignment with IETF RFC 5087,setup of TDM PW using PW FEC for July 2008 4.1 TDM PW TLV’s, Optional timing information using RTP-IETF RFC 3550 July 2008 iv TDM Transport over MPLS using AAL1 Technical Specification IP/MPLS Forum 4.1.0 1 Introduction 1.1 Purpose The purpose of this Specification is to define network interworking