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Liaison statement
SOAM YANG work coordination

Additional information about IETF liaison relationships is available on the IETF webpage and the Internet Architecture Board liaison webpage.
State Posted
Submitted Date 2017-05-03
From Group MEF
From Contact Raghu Ranganathan
To Group lime
To Contacts Carlos Pignataro <>
Ron Bonica <>
Cc Ron Bonica <>
Warren Kumari <>
Carlos Pignataro <>
Benoit Claise <>
Layer Independent OAM Management in the Multi-Layer Environment Discussion List <>
Raghu Ranganathan <>
Response Contact
Purpose For information
Attachments L00265_001_2017Q2-LiaisononSOAMYANG_Ranganathan copy
MEF Forum would like to thank IEEE 802.1 and ITU-T SG15 for the responses to
our Liaisons L00259 (SOAM FM YANG) and L00260 (SOAM PM YANG). We accept, in
principle, that each SDO should define the base YANG modules according to the
way the opcodes are allocated, as described by ITU-T SG15 in their Liaison
response, with the expectation that the modules defined in other SDOs meet the
needs of our members. We also understand that the base material (definition of
MDs/MAs/MEPs etc) will be done in IEEE 802.1.

MEF Forum would like to request from IEEE 802.1 and ITU-T the expected
timelines for completion. It is our intention not to start projects to revise
MEF 38 and MEF 39 at this time, but to wait for modules from IEEE 802.1 and
ITU-T SG15 that we can then use to augment so as to meet our needs.
Additionally, we would like to request that you use MEF 38 and MEF 39, as well
as the identified errata (that we sent previously), as input to your work.

MEF Forum also has the following ongoing work with deliverables to produce YANG
modules related to SOAM FM/PM that could have overlap in the objects and
parameters with IEEE/ITU-T work albeit MEF's focus is not at the Network
Element level.

1) LSO Interface Profile(s) - SOAM and Service Activation Test (SAT). These
profiles are at LSO Reference Points specified in MEF 55 (https
:// The output of this work would
be UML and YANG Modules to support SOAM FM/PM requirements for the MEF Service
in the Service Orchestration Function (SOF) and Domain Connectivity Service in
the Infrastructure Control and Management (ICM).

2) Network Resource Model - OAM classes are being developed in an ongoing
Network Resource Model project for use at an ICM.

MEF will share the UML and YANG Modules for the OAM Classes as we progress our
work so we can ensure alignment with your efforts.

MEF meets next on July 24-27 in Toronto, Canada.