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Liaison statement
LS/r Coordination on YANG data models for SOAM and CFM (reply to MEF-LS109 (TD28-WP3) and IEEE 802.1-oLS34 (TD104-WP3))

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State Posted
Submitted Date 2017-07-06
From Group ITU-T-SG-15
From Contact Hiroshi Ota
To Group OPS
To Contacts Warren Kumari <>
Benoit Claise <>
Cc Scott Mansfield <>
Warren Kumari <>
John Drake <>
The IETF Chair <>
Benoit Claise <>
Response Contact
Purpose For information
Attachments SG15-LS43
ITU-T Study Group 15 would like to thank IEEE 802.1 and MEF for the responses
to our April 2017 liaison regarding YANG for OAM tools (referenced as SG15-LS19
(TD24-WP3)) and the acceptance that each organization should define YANG
modules according to the way the OpCodes are allocated.

The Study Group 15 Plenary Meeting held 19-30 June 2017 approved a new Q14/15
work item targeting a new Recommendation G.8052.1 “Transport OAM Management
Information/Data Models for Transport Ethernet Network Element”.

This new Recommendation will specify the management information models and data
models for the transport Ethernet Network Element (NE) to support specific
interface protocols and specific Management Control Continuum (MCC) functions.
The information models will be interface protocol neutral and will be derived
through pruning and refactoring from the G.7711 core information model and
G.8052 foundation transport Ethernet NE information model. The data models will
be interface protocol-specific and will be translated from these information
models with the assistance of automated translation tooling. The specific
interface protocols considered include, but are not limited to, NETCONF/YANG.
The specific MCC functions covered by this Recommendation are the
G.8013/Y.1731-specified OAM.

The initial deliverable of this new Recommendation G.8052.1 will be an UML OAM
model (pruned/refactored from G.8052 and supporting the G.8013/Y.1731-defined
OpCodes) and its translation as a YANG module. This deliverable is currently
targeted for 10/2018.

In the development of this deliverable, Q14/15 will take as input for
consideration IEEE P802.1Qcx “YANG Data Model for Connectivity Fault
Management” work as well as MEF 38 and 39 and the errata that MEF identified.
We will keep you appraised of our progress and will also appreciate continuous
sharing of information from MEF and IEEE 802.1.

Q14/15 understands that IEEE 802.1 will be meeting in Geneva the week before
the next Study Group 15 Plenary (January 2018). This provides an opportunity to
meet jointly to discuss the alignment of the ITU-T G.8013/Y.1731 OAM YANG and
IEEE 802.1Q CFM YANG. The next meetings of Q14/15 are - Joint Q12/15 and Q14/15
Interim Meeting, 18-22 September 2017 in Ottawa, Canada - Q14/15 Interim
Meeting, 4-8 December 2017 in Europe