Please copy CCAMP into these discussions as the WG actively writing YANG models for optical elements in the network.
Cheers, Adrian From: netmod <netmod-boun...@ietf.org> On Behalf Of David Sinicrope Sent: 24 July 2023 22:11 To: netmod@ietf.org Cc: david.sinicr...@ericsson.com 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, <mailto:kent+i...@watsen.net> <kent+i...@watsen.net> Lou Berger, IETF NETMOD WG Co-Chair, <mailto:lber...@labn.net> <lber...@labn.net> Scott Mansfield, ITU-T Q14/15 Rapporteur, <mailto:scott.mansfi...@ericsson.com> <scott.mansfi...@ericsson.com> Liping Chen, ITU-T Q14/15 Associate Rapporteur, <mailto:che...@cict.com> <che...@cict.com> Paul Nikolich, IEEE 802 Chair, <mailto:p.nikol...@ieee.org> <p.nikol...@ieee.org> Glenn Parsons, IEEE 802.1 Chair, <mailto:glenn.pars...@ericsson.com> <glenn.pars...@ericsson.com> Jessy Rouyer, IEEE 802.1 Vice Chair, <mailto:jessy.rou...@nokia.com> <jessy.rou...@nokia.com> David Law, IEEE 802.3 Chair, <mailto:d...@hpe.com> <d...@hpe.com> Adam Healey, IEEE 802.3 Vice Chair, <mailto:adam.hea...@broadcom.com> <adam.hea...@broadcom.com> From: Lincoln Lavoie Broadband Forum Technical Committee Chair <mailto:lylav...@iol.unh.edu> <lylav...@iol.unh.edu> Liaison Communicated By: Ken Ko Broadband Forum Managing Director <mailto:k...@broadband-forum.org> <k...@broadband-forum.org> Date: 8th 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 <mailto:liais...@broadband-forum.org> <liais...@broadband-forum.org> Lincoln Lavoie, Broadband Forum Technical Committee Chair <mailto:lylav...@iol.unh.edu> <lylav...@iol.unh.edu> Ken Ko, Broadband Forum Managing Director <mailto:k...@broadband-forum.org> <k...@broadband-forum.org> April Nowicki, Broadband Forum Member Support Manager <mailto:anowi...@broadband-forum.org> <anowi...@broadband-forum.org> Marta Seda, Broadband Forum FAN Work Area Director <mailto:marta.s...@calix.com> <marta.s...@calix.com> Joey Boyd, Broadband Forum PON Management Project Stream Leader <mailto:joey.b...@adtran.com> <joey.b...@adtran.com> Broadband Forum Reference: LIAISE-595 Date of Upcoming Broadband Forum Meetings: See https://www.broadband-forum.org/category_meetings_and_events/upcoming-meetings
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