Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) Circuit Emulation Service over MPLS (CEM) Encapsulation
RFC 5143
Document | Type |
RFC - Historic
(February 2008; No errata)
Obsoleted by RFC 4842
|
|
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Authors | Jeremy Brayley , John Shirron , Stephen Vogelsang , Luca Martini , Andy Malis | ||
Last updated | 2015-10-14 | ||
Stream | ISE | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | ISE state | (None) | |
Consensus Boilerplate | Unknown | ||
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5143 (Historic) | |
Telechat date | |||
Responsible AD | Mark Townsley | ||
Send notices to | (None) |
Network Working Group A. Malis Request for Comments: 5143 Verizon Communications Obsoleted by: 4842 J. Brayley Category: Historic J. Shirron ECI Telecom Inc. L. Martini Cisco Systems, Inc. S. Vogelsang Alcatel-Lucent February 2008 Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) Circuit Emulation Service over MPLS (CEM) Encapsulation Status of This Memo This memo defines a Historic Document for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. IESG Note The IESG thinks that this work is related to IETF work done in WG PWE3, but this does not prevent publishing. Abstract This document describes a historical method for encapsulating Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) Path signals for transport across packet-switched networks (PSNs). The PSNs explicitly supported by this document include MPLS and IP. Note that RFC 4842 describes the standards-track protocol for this functionality, and new implementations must use RFC 4842 rather than this document except when interoperability with older implementations is desired. Malis, et al. Historic [Page 1] RFC 5143 SONET/SDH Circuit Emulation over MPLS February 2008 Table of Contents 1. Introduction ....................................................3 2. Conventions Used in This Document ...............................3 3. Scope ...........................................................3 4. CEM Encapsulation Format ........................................4 4.1. Transport Encapsulation ....................................6 4.1.1. MPLS Transport ......................................6 4.1.2. IP Transport ........................................7 5. CEM Operation ...................................................8 5.1. Introduction and Terminology ...............................8 5.1.1. CEM Packetizer and De-Packetizer ....................9 5.1.2. CEM DBA .............................................9 5.2. Description of Normal CEM Operation .......................10 5.3. Description of CEM Operation during DBA ...................10 5.4. Packet Synchronization ....................................11 5.4.1. Acquisition of Packet Synchronization ..............11 5.4.2. Loss of Packet Synchronization .....................11 6. SONET/SDH Maintenance Signals ..................................12 6.1. SONET/SDH to PSN ..........................................12 6.1.1. AIS-P Indication ...................................13 6.1.2. STS SPE Unequipped Indication ......................14 6.1.3. CEM-RDI ............................................14 6.2. PSN to SONET/SDH ..........................................15 6.2.1. AIS-P Indication ...................................15 6.2.2. STS SPE Unequipped Indication ......................15 7. Clocking Modes .................................................16 7.1. Synchronous ...............................................16 7.1.1. Synchronous Unstructured CEM .......................16 7.1.2. Synchronous Structured CEM .........................16 7.2. Asynchronous ..............................................17 8. CEM LSP Signaling ..............................................17 9. Security Considerations ........................................18 10. IANA Considerations ...........................................18 11. References ....................................................18 11.1. Normative References .....................................18 11.2. Informative References ...................................19 Appendix A. SONET/SDH Rates and Formats ...........................20 Appendix B. ECC-6 Definition ......................................21 Malis, et al. Historic [Page 2] RFC 5143 SONET/SDH Circuit Emulation over MPLS February 2008 1. Introduction This document describes a historical method for encapsulating SONET/SDH Path signals for transport across packet-switched networks (PSNs). The native transmission system for circuit-oriented Time Division Multiplexing (TDM) signals is the Synchronous Optical Network (SONET)Show full document text