Re: Broadband Forum Liaison concerning: New Project for Addressing ONU Management at Scale

FYI - the liaison has been posted to IETF Statements 
<https://datatracker.ietf.org/liaison/>.

https://datatracker.ietf.org/liaison/1850/

On 7/24/23 5:26 PM, David Sinicrope wrote:
>
> Thanks Adrian. I wasn't aware of CCAMPs interest in broadband access 
> ONU equipment management, but as it is management of optical network 
> elements they should be aware.
>
> Dave
>
> On 7/24/23 5:22 PM, Adrian Farrel wrote:
>>
>> Please copy CCAMP into these discussions as the WG actively writing 
>> YANG models for optical elements in the network.
>>
>> Cheers,
>>
>> Adrian
>>
>> *From:*netmod <[email protected]> *On Behalf Of *David Sinicrope
>> *Sent:* 24 July 2023 22:11
>> *To:* [email protected]
>> *Cc:* david.sinicrope-IzeFyvvaP7pWk0Htik3J/[email protected]
>> *Subject:* [netmod] Broadband Forum Liaison concerning: New Project 
>> for Addressing ONU Management at Scale
>>
>> Hi All,
>>
>> As noted during the NETMOD session today, the BBF has sent a liaison 
>> regarding their new project for Addressing ONU Management at Scale.
>>
>> While not yet posted to IETF Statements 
>> <https://datatracker.ietf.org/liaison/>, the liaison has the content 
>> below and as noted in the meeting today, should have a response.
>>
>> In the coming days, I'll be drafting the response on behalf of the 
>> Chairs. Input is welcome.
>>
>> Please let me know if you have questions
>>
>> Thanks,
>>
>> Dave Sinicrope
>> IETF Liaison Manager for the Broadband Forum
>>
>> From the Chair's slides:
>>
>> Liaisons and Communications
>>
>> Incoming:
>> – From:Broadband Forum
>> – Received: 2023-03-09
>> – Title: New Project for Addressing ONU Management at Scale
>> – The Broadband Forum Fiber Access Networks (FAN) Work Area recently
>> agreed to initiate a new project for the optimization of management of
>> Optical Network Units (ONU) at scale. This project, called WT-505: ONU
>> Management at Scale, is intended to be an enhancement of the existing
>> specification, TR-385: ITU-T xPON YANG Modules. The following describes
>> the issues and considerations that led to the need for the new project.
>> – See list for attachment
>>
>> Liaison content:
>>
>> *Broadband Forum Liaison To: *
>>
>> Kent Watsen, IETF NETMOD WG Co-Chair, <[email protected]> 
>> <mailto:[email protected]>
>>
>> Lou Berger, IETF NETMOD WG Co-Chair, <[email protected]> 
>> <mailto:[email protected]>
>>
>> Scott Mansfield, ITU-T Q14/15 Rapporteur, 
>> <scott.mansfield-IzeFyvvaP7pWk0Htik3J/[email protected]> <mailto:scott.mansfield-IzeFyvvaP7pWk0Htik3J/[email protected]>
>>
>> Liping Chen, ITU-T Q14/15 Associate Rapporteur, <chenlp-/[email protected]> 
>> <mailto:chenlp-/[email protected]>
>>
>> Paul Nikolich, IEEE 802 Chair, <[email protected]> 
>> <mailto:[email protected]>
>>
>> Glenn Parsons, IEEE 802.1 Chair, <glenn.parsons-IzeFyvvaP7pWk0Htik3J/[email protected]> 
>> <mailto:glenn.parsons-IzeFyvvaP7pWk0Htik3J/[email protected]>
>>
>> Jessy Rouyer, IEEE 802.1 Vice Chair, <[email protected]> 
>> <mailto:[email protected]>
>>
>> David Law, IEEE 802.3 Chair, <[email protected]> <mailto:[email protected]>
>>
>> Adam Healey, IEEE 802.3 Vice Chair, <adam.healey-dY08KVG/lbpWk0Htik3J/[email protected]> 
>> <mailto:adam.healey-dY08KVG/lbpWk0Htik3J/[email protected]>
>>
>> *From:*
>>
>> Lincoln Lavoie
>> Broadband Forum Technical Committee Chair <[email protected]> 
>> <mailto:[email protected]>
>>
>> *Liaison Communicated* *By:*
>>
>> Ken Ko
>>
>> Broadband Forum Managing Director <kko-QSt+ys/[email protected]> 
>> <mailto:kko-QSt+ys/[email protected]>
>>
>> *Date:* 8^th June 2023
>>
>> *Subject:* For Information: New Project for Addressing ONU Management 
>> at Scale
>>
>> The Broadband Forum Fiber Access Networks (FAN) Work Area recently 
>> agreed to initiate a new project for the optimization of management 
>> of Optical Network Units (ONU) at scale. This project, called WT-505: 
>> ONU Management at Scale, is intended to be an enhancement of the 
>> existing specification, TR-385: ITU-T xPON YANG Modules. The 
>> following describes the issues and considerations that led to the 
>> need for the new project.
>>
>> In contrast to many other transport technologies, a single PON 
>> interface can multiplex as many as 128 ONUs. It is also typical for a 
>> single Optical Line Termination (OLT) to contain many such PON 
>> interfaces.
>>
>> At this level of dimensioning, the OLT YANG modeled configuration 
>> data becomes very large due to the high number of ONUs to be managed. 
>> With current TR-385 and TR-383 Broadband Forum YANG models, the 
>> management of large OLTs suffers severe performance degradation. 
>> Examples of such degradation are:
>>
>> ·Time to validate YANG constraints when configuring ONU data nodes 
>> (e.g., due to very large OLT interface and hardware component lists)
>>
>> ·Time to delete an ONU (time to retrieve all data nodes of the ONU)
>>
>> ·Time to perform a <copy-config> of a full OLT configuration.
>>
>> Many Broadband Forum contributions have been submitted and discussed 
>> that demonstrate ONU management needs to be optimized to keep the OLT 
>> manageable. It has been determined that efficient optimization of ONU 
>> management requires the following measures:
>>
>> ·Collocate ONU data nodes per ONU, rather than have them interleaved 
>> with OLT data nodes (e.g., in the same interface or hardware 
>> component list) as per TR-385. This involves defining a list of ONUs 
>> in the OLT where each ONU entry contains all ONU data nodes.
>>
>> ·Bring a strong reduction of the configuration data size per ONU. 
>> This will be achieved using ONU templates combined with the use of 
>> shared ONU profiles.
>>
>> IETF schema mount was considered as a solution for collocating ONU 
>> data nodes. There were drawbacks to this approach, however. The size 
>> of the datastore was not improved as the same data nodes are mounted 
>> per ONU. There is also a known lack of tooling that supports schema 
>> mount making it difficult for this solution to be broadly implemented 
>> in a timely manner. The following alternative has been agreed upon.
>>
>> Complement current standard YANG models with new models that 
>> implement optimization measures for the data nodes applicable to ONU 
>> devices. These current models are found in Broadband Forum standards, 
>> e.g., TR-355, TR-383, TR-385, and standards from other organizations, 
>> e.g., IETF, IEEE, ITU-T.
>>
>> This involves:
>>
>> ·Deriving from existing standard modules, the development of modules 
>> defining a list of ONU templates.
>>
>> ·Deriving from existing standard modules, the development of modules 
>> defining a list of ONU instances, where each instance refers to one 
>> or more ONU templates and gives the possibility to complement or 
>> overrule any data originating from templates.
>>
>> ·Deriving from existing standard modules, the definition of modules 
>> defining ONU profiles that can be shared between ONUs templates and 
>> instances. ONU profiles should be distinct from OLT profiles to allow 
>> validation rules that are specific to ONUs.
>>
>> Deriving from existing standard modules means the modules will not be 
>> used as written. Rather, applicable portions of those modules are 
>> copied into new modules defining templates, profiles, etc. The 
>> modules developed in this project will reference the source YANG 
>> modules and specifications, and provide any license text as required 
>> by the source organization.
>>
>> Sincerely,
>>
>> Lincoln Lavoie,
>>
>> Broadband Forum Technical Committee Chair
>>
>> **
>>
>> *CC:*
>>
>> Liaisons at BBF <liaisons-QSt+ys/[email protected]> 
>> <mailto:liaisons-QSt+ys/[email protected]>
>>
>> Lincoln Lavoie, Broadband Forum Technical Committee Chair 
>> <[email protected]> <mailto:[email protected]>
>>
>> Ken Ko, Broadband Forum Managing Director <kko-QSt+ys/[email protected]> 
>> <mailto:kko-QSt+ys/[email protected]>
>>
>> April Nowicki, Broadband Forum Member Support Manager 
>> <anowicki-QSt+ys/[email protected]> <mailto:anowicki-QSt+ys/[email protected]>
>>
>> Marta Seda, Broadband Forum FAN Work Area Director 
>> <[email protected]> <mailto:[email protected]>
>>
>> Joey Boyd, Broadband Forum PON Management Project Stream Leader 
>> <[email protected]> <mailto:[email protected]>
>>
>> **
>>
>> *Broadband Forum Reference: *LIAISE-595
>>
>> **
>>
>> *Date of Upcoming Broadband Forum* *Meetings: *See 
>> https://www.broadband-forum.org/category_meetings_and_events/upcoming-meetings 
>>
>>
>> **
>>