--- 1/draft-ietf-mpls-tp-rosetta-stone-10.txt 2013-07-13 04:14:24.982731023 -0700 +++ 2/draft-ietf-mpls-tp-rosetta-stone-11.txt 2013-07-13 04:14:25.018731926 -0700 @@ -1,25 +1,25 @@ MPLS Working Group H. van Helvoort (Ed) Internet Draft Huawei Technologies Intended status: Informational -Expires: August 2013 L. Andersson (Ed) +Expires: January 2014 L. Andersson (Ed) Huawei Technologies N. Sprecher (Ed) Nokia Siemens Networks - February 12, 2013 + July 13, 2013 A Thesaurus for the Terminology used in Multiprotocol Label Switching Transport Profile (MPLS-TP) drafts/RFCs and ITU-T's Transport Network Recommendations. - draft-ietf-mpls-tp-rosetta-stone-10 + draft-ietf-mpls-tp-rosetta-stone-11 Status of this Memo This Internet-Draft is submitted to IETF in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. @@ -28,21 +28,21 @@ months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt. The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. - This Internet-Draft will expire in August 2013. + This Internet-Draft will expire on January 13, 2014. Copyright Notice Copyright (c) 2013 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 @@ -66,21 +66,20 @@ contexts than just Transport Networks. The definitions presented in this document do not provide exclusive nor complete interpretations of MPLS-TP concepts. This document simply allows the MPLS-TP terms to be applied within the Transport Network context. Table of Contents 1. Introduction 4 1.1. Contributing Authors 4 1.2. Abbreviations 4 - SCC Signaling Communication Channel 5 2. Terminology 5 2.1. MPLS-TP Terminology Sources 5 2.2. ITU-T Transport Network Terminology Sources 5 2.3. Common Terminology Sources 6 3. Thesaurus 6 3.1. Associated bidirectional path: 6 3.2. Bidirectional path: 6 3.3. Client layer network: 6 3.4. Communication Channel (CC): 6 3.5. Concatenated Segment: 7 @@ -112,38 +111,39 @@ 3.28. MPLS-TP Recovery: 12 3.28.1. End-to-end recovery: 12 3.28.2. Link recovery: 12 3.28.3. Segment recovery: 12 3.29. MPLS-TP Ring Topology: 13 3.29.1. MPLS-TP Logical Ring: 13 3.29.2. MPLS-TP Physical Ring: 13 3.30. OAM flow: 13 3.31. Operations System (OS): 13 3.32. Path: 13 - 3.33. Section Layer Network: 13 - 3.34. Segment: 14 - 3.35. Server layer: 14 - 3.36. Server MEPs: 14 - 3.37. Signaling Communication Channel (SCC): 15 - 3.38. Signaling Communication Network (SCN): 15 - 3.39. Span: 15 - 3.40. Sublayer: 15 - 3.41. Transport Entity: 15 - 3.41.1. Working Entity: 15 - 3.41.2. Protection Entity: 16 - 3.41.3. Recovery entity: 16 - 3.42. Transmission media layer: 16 - 3.43. Transport Network: 16 - 3.44. Transport path: 16 - 3.45. Transport path layer: 16 - 3.46. Transport service layer: 17 - 3.47. Unidirectional path: 17 + 3.33. Protection priority: 13 + 3.34. Section Layer Network: 14 + 3.35. Segment: 14 + 3.36. Server layer: 14 + 3.37. Server MEPs: 14 + 3.38. Signaling Communication Channel (SCC): 15 + 3.39. Signaling Communication Network (SCN): 15 + 3.40. Span: 15 + 3.41. Sublayer: 15 + 3.42. Transport Entity: 15 + 3.42.1. Working Entity: 16 + 3.42.2. Protection Entity: 16 + 3.42.3. Recovery entity: 16 + 3.43. Transmission media layer: 16 + 3.44. Transport Network: 16 + 3.45. Transport path: 16 + 3.46. Transport path layer: 16 + 3.47. Transport service layer: 17 + 3.48. Unidirectional path: 17 4. Guidance on the Application of this Thesaurus 17 5. Management Considerations 17 6. Security Considerations 18 7. IANA Considerations 18 8. Acknowledgments 18 9. References 18 9.1. Normative References 18 9.2. Informative References 20 1. Introduction @@ -178,22 +178,22 @@ CC Communications Channel CE Customer Edge DCN Data Communication Network ECC Embedded Communication Channel EMF Equipment Management Function - MCC Management Communication Channel + MCC Management Communication Channel MCN Management Communication Network ME Maintenance Entity MEG Maintenance Entity Group MEP Maintenance Entity Group End Point MIP Maintenance Entity Group Intermediate Point @@ -589,58 +589,66 @@ A system that performs the functions that support processing of information related to operations, administration, maintenance, and provisioning (OAM&P) for the networks, including surveillance and testing functions to support customer access maintenance. 3.32. Path: See Transport path. -3.33. Section Layer Network: +3.33. Protection priority: + + Fault conditions (e.g., signal failed), external commands (e.g, + forced switch, manual switch) and protection states (e.g., no + request) are defined to have a relative priority with respect to + each other. Priority is applied to these conditions/command/states + locally at each endpoint and between the two endpoints. + +3.34. Section Layer Network: A section layer is a server layer (which may be MPLS-TP or a different technology) that provides for the transfer of the section- layer client information between adjacent nodes in the transport- path layer or transport-service layer. A section layer may provide for aggregation of multiple MPLS-TP clients. Note that [ITU- T_G.805] defines the section layer as one of the two layer networks in a transmission-media layer network. The other layer network is the physical-media layer network. Section layer networks are concerned with all the functions which provide for the transfer of information between locations in path layer networks. Physical media layer networks are concerned with the actual fibres, metallic wires or radio frequency channels which support a section layer network. -3.34. Segment: +3.35. Segment: A link connection as defined in [ITU-T_G.805]. A segment is the part of an LSP that traverses a single link or the part of a PW that traverses a single link (i.e., that connects a pair of adjacent {Switching|Terminating} Provider Edges). See also "Concatenated Segment". -3.35. Server layer: +3.36. Server layer: A service layer is a layer network in which transport paths are used to carry a customer's (individual or bundled) service (may be point- to-point, point-to-multipoint or multipoint-to-multipoint services). In a client/server relationship (see [ITU-T_G.805]) the server layer network provides a (transport) service to the higher client layer network (usually the layer network under consideration). -3.36. Server MEPs: +3.37. Server MEPs: A server MEP is a MEP of an ME that is defined in a layer network below the MPLS-TP layer network being referenced. A server MEP coincides with either a MIP or a MEP in the client (MPLS-TP) layer network. See also [RFC6371] section 3.5 and [ITU-T G.8113.1] clause 6.5. For example, a server MEP can be either: . A termination point of a physical link (e.g. IEEE 802.3), an SDH @@ -653,103 +661,103 @@ . An MPLS-TP LSP MEP for MPLS-TP PWs, defined in [RFC6371] section 3.4.; . An MPLS-TP TCM MEP for higher-level TCMs, defined in [RFC6371] sections 3.3. and 3.5. The server MEP can run appropriate OAM functions for fault detection, and notifies a fault indication to the MPLS-TP layer network. -3.37. Signaling Communication Channel (SCC): +3.38. Signaling Communication Channel (SCC): A CC dedicated for control plane communications. The SCC may be used for GMPLS/ASON signaling and/or other control plane messages (e.g., routing messages). -3.38. Signaling Communication Network (SCN): +3.39. Signaling Communication Network (SCN): A DCN supporting control plane communication is referred to as a Signaling Communication Network (SCN). -3.39. Span: +3.40. Span: A span is synonymous with a link. -3.40. Sublayer: +3.41. Sublayer: Sublayer is defined in [ITU-T_G.805]. The distinction between a layer network and a sublayer is that a sublayer is not directly accessible to clients outside of its encapsulating layer network and offers no direct transport service for a higher layer (client) network. -3.41. Transport Entity: +3.42. Transport Entity: A "Transport Entity" is a node, link, transport path segment, concatenated transport path segment, or entire transport path. -3.41.1. Working Entity: +3.42.1. Working Entity: A "Working Entity" is a transport entity that carries traffic during normal network operation. -3.41.2. Protection Entity: +3.42.2. Protection Entity: A "Protection Entity" is a transport entity that is pre-allocated and used to protect and transport traffic when the working entity fails. -3.41.3. Recovery entity: +3.42.3. Recovery entity: A "Recovery Entity" is a transport entity that is used to recover and transport traffic when the working entity fails. -3.42. Transmission media layer: +3.43. Transmission media layer: A layer network, consisting of a section layer network and a physical layer network as defined in [ITU-T_G.805], that provides sections (two-port point-to-point connections) to carry the aggregate of network-transport path or network-service layers on various physical media. -3.43. Transport Network: +3.44. Transport Network: A Transport Network provides transmission of traffic between attached client devices by establishing and maintaining point-to- point or point-to-multipoint connections between such devices. A Transport Network is independent of any higher-layer network that may exist between clients, except to the extent required to supply this transmission service. In addition to client traffic, a Transport Network may carry traffic to facilitate its own operation, such as that required to support connection control, network management, and Operations, Administration and Maintenance (OAM) functions. -3.44. Transport path: +3.45. Transport path: A network connection as defined in [ITU-T_G.805]. In an MPLS-TP environment a transport path corresponds to an LSP or a PW. -3.45. Transport path layer: +3.46. Transport path layer: A (sub)layer network that provides point-to-point or point-to- multipoint transport paths. It provides OAM that is independent of the clients that it is transporting. -3.46. Transport service layer: +3.47. Transport service layer: A layer network in which transport paths are used to carry a customer's (individual or bundled) service (may be point-to-point, point-to-multipoint or multipoint-to-multipoint services). -3.47. Unidirectional path: +3.48. Unidirectional path: A Unidirectional Path is a path that supports traffic flow in only one direction. 4. Guidance on the Application of this Thesaurus As discussed in the introduction to this document, this thesaurus is intended to bring the concepts and terms associated with MPLS-TP into the context of the ITU-T's Transport Network architecture. Thus, it should help those familiar with MPLS to see how they may