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Liaison statement
LS/r Coordination of IM & DM for OAM (reply to IEEE 802.3 – LS61)

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State Posted
Submitted Date 2018-03-02
From Group ITU-T
From Contact Hiroshi Ota
To Group netmod
To Contacts Jürgen Schönwälder <>
Tom Nadeau <>
Cc Joel Jaeggli <>
Warren Kumari <>
Kent Watsen <>
Lou Berger <>
Benoit Claise <>
Network Modeling Discussion List <>
Purpose For action
Deadline 2018-09-17 Action Needed
Attachments SG15-LS103
Following up on the very successful information exchange and coordination
related to information modelling during the “Joint IEEE 802 and ITU-T Study
Group 15 workshop “Building Tomorrow’s Networks” held in Geneva, 27 January
2018” and the “ITU-T Q14/15 Rapporteur Group Meeting held in Geneva, 28 January
2018”, Q14/15 would like to invite experts to monthly conference calls to
discuss and share modelling experiences.

Focusing initially on ensuring interoperability of the YANG supporting OAM
topics including IEEE 802.1 CFM, IEEE 802.3 Link OAM, and ITU-T G.8013/Y.1731
Performance Monitoring. As the network management protocols evolve from SNMP,
there are several new protocols to consider. Q14/15 looks at modelling in a
network management protocol independent way that can aid in future-proofing
transport network equipment management. The conversion of UML (Information
Model) to YANG is supported by an open-source tool that is driven by mapping
rules derived from work in the ITU-T, MEF, and ONF. Ensuring the YANG produced
to support OAM functionality interoperates as seamlessly as possible is one of
the goals of this collaboration. It is important that the YANG written by IEEE
802.1 for CFM can be leveraged by the ITU-T YANG written for G.8013/Y.1731
because they share common components. MEF has Service OAM specifications that
may want to utilize the IEEE and ITU-T work for both fault management and
performance monitoring. The BBF has a large repository of YANG and experience
in writing YANG for access equipment. The ONF brings expertise on information
modelling and tooling. The IETF is where NETCONF and YANG were produced, and
the IETF has many YANG models that form the basis of a network management

Q14/15 would like to invite you to join a monthly conference call occurring on
the third Monday of every month beginning March 19, 2018 at 14:00 – 15:00
Geneva Time. The logistics will be posted on the SG15 web page at:

Thank you for your assistance in creating an energetic community around the
information and data modelling to provide coordinated YANG standards.