Liaison statement
Addressing ONU Management at Scale

Dear Colleagues

The Broadband Forum (BBF) is working on a project called WT-505: ONU Management
at Scale, which is intended to be an enhancement of the existing specification,
TR-385: YANG Modules for PON Man-agement. You were made aware of this work
through liaison LIAISE-595, sent in 2023.

Based on the technical progress, the Broadband Forum agreed to work on a
short-term solution that is based on a list of “ONU templates”, combined with a
list of “ONU instances” that leverage these tem-plates. In doing so, the size
of the configuration datastore can be reduced significantly.

This work is considered complementary to the IETF call for Template
Requirements for a long-term IETF solution. The BBF long-term vision is to
realign the approaches documented by the IETF once a final solution is
available.

As part of the “ONU template” specification, BBF will define new “YANG
groupings” that contain data nodes originally defined in some existing BBF and
IETF YANG modules. These groupings can then be used as part of these templates.

With this liaison, the Broadband Forum would like to inform you that as part of
this short-term solution, we will be copying the YANG definitions from the
IETF, while adhering to the corrected legal provisions relating to IETF
documents, as outlined in
https://trustee.ietf.org/documents/trust-legal-provisions/tlp-5/

Specifically, considering the IETF YANG modules as “Code Component”, the BBF
will adhere to the “Revised BSD License” and will clearly attribute the
derivative work to IETF.

The BBF believes that with this derived work we will achieve a solution that
can meet the near-term needs of large-scale deployments of NETCONF/YANG managed
fiber access networks. In parallel, we will continue to monitor, and our
members actively participate in, the long-term template solution current-ly
under discussion within IETF. In doing so, we will also analyze if some parts
of the WT-505 solution could be reused in the long-term IETF solution and
contribute those to the IETF through our members.

Please let us know if you have any comments or concerns with BBF progressing
according to this pro-cess.

Sincerely,
Lincoln Lavoie,
Broadband Forum Technical Committee Chair