Structure-Agnostic Time Division Multiplexing (TDM) over Packet (SAToP)
RFC 4553
Document | Type |
RFC - Proposed Standard
(June 2006; Errata)
Was draft-ietf-pwe3-satop (pwe3 WG)
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Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text pdf html bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 4553 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Mark Townsley | ||
Send notices to | danny@tcb.net, yaakov_s@rad.com, stbryant@cisco.com |
Network Working Group A. Vainshtein, Ed. Request for Comments: 4553 Axerra Networks Category: Standards Track YJ. Stein, Ed. RAD Data Communications June 2006 Structure-Agnostic Time Division Multiplexing (TDM) over Packet (SAToP) 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 (2006). Abstract This document describes a pseudowire encapsulation for Time Division Multiplexing (TDM) bit-streams (T1, E1, T3, E3) that disregards any structure that may be imposed on these streams, in particular the structure imposed by the standard TDM framing. Vainshtein & Stein Standards Track [Page 1] RFC 4553 Structure-Agnostic TDM over Packet June 2006 Table of Contents 1. Introduction ....................................................3 2. Terminology and Reference Models ................................3 2.1. Terminology ................................................3 2.2. Reference Models ...........................................4 3. Emulated Services ...............................................4 4. SAToP Encapsulation Layer .......................................5 4.1. SAToP Packet Format ........................................5 4.2. PSN and PW Demultiplexing Layer Headers ....................5 4.3. SAToP Header ...............................................6 4.3.1. Usage and Structure of the Control Word .............8 4.3.2. Usage of RTP Header .................................9 5. SAToP Payload Layer ............................................10 5.1. General Payloads ..........................................10 5.2. Octet-Aligned T1 ..........................................11 6. SAToP Operation ................................................12 6.1. Common Considerations .....................................12 6.2. IWF Operation .............................................12 6.2.1. PSN-Bound Direction ................................12 6.2.2. CE-Bound Direction .................................13 6.3. SAToP Defects .............................................14 6.4. SAToP PW Performance Monitoring ...........................15 7. Quality of Service (QoS) Issues ................................16 8. Congestion Control .............................................16 9. Security Considerations ........................................18 10. Applicability Statement .......................................18 11. IANA Considerations ...........................................20 12. Acknowledgements ..............................................20 13. Co-Authors ....................................................20 14. Normative References ..........................................21 15. Informative References ........................................22 Appendix A: Old Mode of SAToP Encapsulation over L2TPv3 ...........24 Appendix B: Parameters That MUST Be Agreed upon during the PW Setup .................................................24 Vainshtein & Stein Standards Track [Page 2] RFC 4553 Structure-Agnostic TDM over Packet June 2006 1. Introduction This document describes a method for encapsulating Time Division Multiplexing (TDM) bit-streams (T1, E1, T3, E3) as pseudowires over packet-switching networks (PSN). It addresses only structure- agnostic transport, i.e., the protocol completely disregards any structure that may possibly be imposed on these signals, in particular the structure imposed by standard TDM framing [G.704]. This emulation is referred to as "emulation of unstructured TDM circuits" in [RFC4197] and suits applications where the PEs have no need to interpret TDM data or to participate in the TDM signaling. The SAToP solution presented in this document conforms to the PWE3 architecture described in [RFC3985] and satisfies both the relevant general requirements put forward in [RFC3916] and specific requirements for unstructured TDM signals presented in [RFC4197]. As with all PWs, SAToP PWs may be manually configured or set up using the PWE3 control protocol [RFC4447]. Extensions to the PWE3 controlShow full document text