Liaison statement
LSout to IETF TEAS, OPSAWG and CCAMP WG on the start of work on profiling specification for multi-site connectivity services based on ACTN

1. Overall description:
ETSI ISG NFV would like to inform the IETF TEAS, OPSAWG and CCAMP WGs about the
start of a new work item DGS/NFV-SOL019 "Profiling specification of solutions
for Multi-site Connectivity Services based on Abstraction and Control of TE
Networks (ACTN)".

The objective of this work item is to specify how the NETCONF/RESTCONF
protocols and YANG data models defined in IETF for the Abstraction and Control
of TE Networks (ACTN) interfaces could be used at the interfaces exposed by the
WAN Infrastructure Manager (WIM), to fulfil the requirements and information
model about “multi-site connectivity services” specified in the published ETSI
GS NFV-IFA 032 "Management and Orchestration; Interface and Information Model
Specification for Multi-Site Connectivity Services". The specification also
describes the operations and the information elements that are exchanged over
these interfaces.

A number of existing (or in progress) protocol and data model solutions,
including ACTN, have been already analysed with respect to the ETSI GS NFV-IFA
032 interfaces, operations and information elements,  and the results of this
analysis have been published in ETSI GR NFV-SOL 017 “Protocols and Data Models;
Report on protocol and data model solutions for Multi-site Connectivity
Services”.

The results of the analysis in ETSI GR NFV-SOL 017 confirm that the scope of
functionality of the interfaces exposed by the WIM map to the functionality
offered by the ACTN framework and that the NETCONF/RESTCONF protocols and YANG
data models defined in IETF for ACTN provide substantial support for the
multi-site connectivity services. However, some gaps to fulfil the requirements
of ETSI GS NFV-IFA 032, has been identified and described in section 6 of ETSI
GR NFV-SOL 017, and following are the highlights:

•       Reservation specific attributes and operations for MSCS management are
not supported; •       Capacity related information is partially supported, and
capacity threshold management is not supported; •       Fault Management is
partially supported; •       Performance Monitoring Jobs management is
partially supported and PM threshold management is not supported; •      
Filter attributes are partially supported; •       Query of subscription is
partially supported and querying of multiple subscriptions is not supported.

The expectation is these gaps can be addressed by future work in TEAS, OPSAWG
and CCAMP WGs. If you or any individuals have any comments on these documents
in general, and on the recommendations on gaps highlighted above in particular
then we would welcome receiving them e.g., via LS reply. We would appreciate if
our request can be reviewed in the next IETF meeting 113.

2. References:
The latest published version of the GS NFV-IFA 032 is available at the
following link
https://www.etsi.org/deliver/etsi_gs/NFV-IFA/001_099/032/03.03.01_60/gs_NFV-IFA032v030301p.pdf
The latest published version of the ETSI GR NFV-SOL 017 is available at the
following link
https://www.etsi.org/deliver/etsi_gr/NFV-SOL/001_099/017/03.03.01_60/gr_NFV-SOL017v030301p.pdf
Currently, the DGS/NFV-SOL019 is in an “early draft” status. Ongoing drafts of
the DGS/NFV-SOL019 are available in the “NFV Open Area” accessible via
https://docbox.etsi.org/ISG/NFV/Open/Drafts.

3. Date of next meetings of the originator:
NFV#38  May 30th -  - June 3rd
Regular SOL WG meetings every Thursday.