ITU-T G.8012.1-2012
Interfaces for the Ethernet transport network (Study Group 15)

Standard No.

ITU-T G.8012.1-2012

Release Date

2012

Published By

International Telecommunication Union (ITU)

Latest

ITU-T G.8012.1-2012

Scope

This Recommendation defines the interfaces of the Ethernet transport network to be used within and between subnetworks of the Ethernet network, in terms of Ethernet transport hierarchy, formats for mapping and multiplexing client signals into Ethernet connections and formats for multiplexing Ethernet connection signals into Ethernet or non-Ethernet connection signals. These interfaces support the transport of Ethernet services, so-called Ethernet virtual connection (EVC) services, as defined in [ITU-T G.8011]. The Ethernet connections support e-Line, E-Tree and E-LAN Ethernet services as defined in [ITU-T G.8011]. This Recommendation specifies the interworking aspects between EVC service signals on an Ethernet user-to-network interface (UNI) and Ethernet connection signals on an Ethernet network-to-network interface (NNI). This Recommendation does not specify the Ethernet component and/or equipment models to meet the Ethernet NNI. Those components and models are defined in [ITU-T G.8021] and [ITU-T G.8021.1]. The interfaces defined in this Recommendation can be applied at NNIs and UNIs of the Ethernet transport network. The Ethernet UNI is formed by an Ethernet interface and the Ethernet NNI by an Ethernet interface or an Ethernet over Transport interface. The Ethernet over Transport NNI uses various server layer networks like optical transport hierarchy (OTH) and SDH. [ITU-T G.8012] describes the mapping of ETH_CI into those server layers mainly for Ethernet private line applications. This Recommendation describes the mapping of S-EC, B-EC, BS-EC, L-EC and ESP signals into those server layers for an Ethernet transport network application which deploys a mix of ETY and OTH server layers. It is recognized, for Ethernet over Transport interfaces used within Ethernet subnetworks, that aspects of the interface are transport technology dependent. The transport technology dependent aspects are defined in the transport technology specific Recommendations, e.g., [ITU-T G.709] and [ITU-T G.707]. The operations, administration and maintenance (OAM) functionality necessary for operations and management of Ethernet subnetworks is described in [ITU-T G.8013]. The detailed requirements are specified in a number of ITU-T Recommendations, IEEE Standards and MEF Technical Specifications, which are referred to. This Recommendation provides a description of the applicability of Ethernet OAM to the different types of Ethernet connections. Note that [ITU-T G.8012] was developed prior to [ITU-T G.8013] and did not discuss Ethernet OAM.

ITU-T G.8012.1-2012 Referenced Document

• ITU-T G.7041-2011 Generic framing procedure (Study Group 15)
• ITU-T G.707-2007 Network node interface for the synchronous digital hierarchy (SDH) (Study Group 15)
• ITU-T G.709-2012 Interfaces for the Optical Transport Network (Study Group 15)
• ITU-T G.800-2012 Unified functional architecture of transport networks (Study Group 15)
• ITU-T G.8032-2012 Ethernet ring protection switching (Study Group 15)
• ITU-T G.8262-2010 Timing characteristics of a synchronous Ethernet equipment slave clock Study Group 15
• ITU-T G.841-1998 Types and Characteristics of SDH Network Protection Architectures - Series G: Transmission Systems and Media, Digital Systems and Networks Digital Transmission Systems - Digital Networks - SDH Network Characteristics (Study Group 15; 140 pp)
• ITU-T G.842-1997 Interworking of SDH Network Protection Architectures - Series G: Transmission Systems and Media Digital Systems and Networks Digital Transmission Systems - Digital Networks - SDH Network Characteristics
• ITU-T G.873.1-2011 Optical Transport Network (OTN): Linear protection (Study Group 15)
• ITU-T G.873.2-2012 ODUk shared ring protection (Study Group 15)
• ITU-T Y.1303-2011 Generic framing procedure (Study Group 15)
• ITU-T Y.1322-2007 Network node interface for the synchronous digital hierarchy (SDH) Study Group 15

ITU-T G.8012.1-2012 history

• 2012 ITU-T G.8012.1-2012 Interfaces for the Ethernet transport network (Study Group 15)