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
|
|
|---|---|---|---|
| Last updated | 2015-10-14 | ||
| Stream | ISE | ||
| Formats | plain text pdf html 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)
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