An In-Band Data Communication Network For the MPLS Transport Profile
RFC 5718
Document | Type | RFC - Proposed Standard (January 2010; No errata) | |
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Authors | Adrian Farrel , Dieter Beller | ||
Last updated | 2018-12-20 | ||
Replaces | draft-beller-mpls-tp-gach-dcn | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5718 (Proposed Standard) | |
Action Holders |
(None)
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Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ross Callon | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) D. Beller Request for Comments: 5718 Alcatel-Lucent Category: Standards Track A. Farrel ISSN: 2070-1721 Old Dog Consulting January 2010 An In-Band Data Communication Network For the MPLS Transport Profile Abstract The Generic Associated Channel (G-ACh) has been defined as a generalization of the pseudowire (PW) associated control channel to enable the realization of a control/communication channel that is associated with Multiprotocol Label Switching (MPLS) Label Switched Paths (LSPs), MPLS PWs, MPLS LSP segments, and MPLS sections between adjacent MPLS-capable devices. The MPLS Transport Profile (MPLS-TP) is a profile of the MPLS architecture that identifies elements of the MPLS toolkit that may be combined to build a carrier-grade packet transport network based on MPLS packet switching technology. This document describes how the G-ACh may be used to provide the infrastructure that forms part of the Management Communication Network (MCN) and a Signaling Communication Network (SCN). Collectively, the MCN and SCN may be referred to as the Data Communication Network (DCN). This document explains how MCN and SCN messages are encapsulated, carried on the G-ACh, and demultiplexed for delivery to the management or signaling/routing control plane components on an MPLS-TP node. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc5718. Beller & Farrel Standards Track [Page 1] RFC 5718 DCN for MPLS Transport Profile January 2010 Copyright Notice Copyright (c) 2010 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. 1. Introduction The associated channel header (ACH) is specified in [RFC4385]. It is a packet header format for use on pseudowires (PWs) in order to identify packets used for Operations, Administration, and Maintenance (OAM) and similar functions. The use of the ACH is generalized in [RFC5586] and can be applied on any Multiprotocol Label Switching (MPLS) Label Switching Path (LSP). This is referred to as the Generic Associated Channel (G-ACh) and is intended to create a control/management communication channel associated with the LSP that can be used to carry packets used for OAM and similar functions (e.g., control/management plane messages). The purpose of a packet carried on the G-ACh is indicated by the value carried by the Channel Type field of the ACH and a registry of values is maintained by IANA ([RFC4446] and [RFC4385]). The ACH is referred to in this document as the G-ACh header. The MPLS transport profile (MPLS-TP) is described in [MPLS-TP] and in [RFC5654]. MPLS-TP is the application of MPLS to construct a packet transport network. It constitutes a profile of MPLS that enables operational models typical in transport networks, which includes additional OAM, survivability, and other maintenance functions not previously supported by MPLS. Label Switching Routers (LSRs) in MPLS networks may be operated using management protocols or control plane protocols. Messaging in these protocols is normally achieved using IP packets exchanged over IP- capable interfaces. However, some nodes in MPLS-TP networks may be constructed without support for direct IP encapsulation on their line-side interfaces and without access to an out-of-fiber data Beller & Farrel Standards Track [Page 2] RFC 5718 DCN for MPLS Transport Profile January 2010 communication network. In order that such nodes can communicateShow full document text