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)
|
|
|---|---|---|---|
| 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].
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