Markdown Version | Transcript | Recording 1 | Recording 2 | Session Materials

Session Date/Time: 16 Mar 2026 03:30

CCAMP

IETF 125 - Session I Location: Shenzhen, China Chairs: Daniele Ceccarelli, Fatai Zhang

Summary

The CCAMP Working Group met for its first of two sessions at IETF 125. The session focused on the status of the working group, updates on WDM and OTN YANG models, performance management streaming, and microwave radio link modeling. Key highlights included the approval of the optical impairment model by the IESG, progress on 3R regenerator modeling in WDM tunnels, and alignment of OTN slicing with the Network Resource Partition (NRP) concepts from the TEAS WG.

Key Discussion Points

Working Group Status and Admin

• Chairs' Overview: The chairs welcomed participants to Shenzhen. The Note Well was reviewed, and participants were reminded to use Meetecho for the mic queue and blue sheets.
• Document Dependencies: Haomian Han reported that while document dates have shifted, the primary blocker (TE Types) is now with the IESG, which should unblock several CCAMP drafts.
• RFC Editor Queue: Several documents are currently in the queue, including Layer 1 Types and OTN Topo.
• IESG Update: Kethan Razdan informed the group that the optical impairment model (referenced in context of draft-ietf-ccamp-optical-path-computation-yang) has been approved by the IESG.
• Chartering: The WG charter update is scheduled for a telechat in early April.

WDM Tunnel YANG Model

Presentation: A YANG Data Model for WDM Tunnels Draft: draft-ietf-ccamp-wdm-tunnel-yang

• Aiguo Hu presented updates focusing on 3R regenerator scenarios.
• The group is working to identify key scenarios (100G/400G Ethernet over OTSI) to determine which require standardization versus proprietary handling.
• Technical focus remains on defining regeneration layers, digital termination sequences, and inverse multiplexing.
• Future work involves aligning this model with draft-ietf-ccamp-optical-path-computation-yang and pluggable management.

OTN Network Slicing

Presentation: Framework and Data Model for OTN Network Slicing Draft: draft-ietf-ccamp-yang-otn-slicing

• Aiguo Hu presented updates on aligning the draft with the Network Resource Partition (NRP) concept. The "Slice-ID" has been renamed to "NRP-ID".
• The requirement for abstract topologies has been removed; NRP realization is now done via direct marking on the native OTN TE topology.
• Discussion on ONSON WG: There was discussion regarding whether this work should move to the proposed ONSON (formerly ONIONS) WG.
  • Adrian Farrel argued that if the work is nearly finished, it should proceed in CCAMP rather than waiting for a new WG's formation.
  • Haomian Han noted that ONSON appears focused on packet technologies, whereas this draft is OTN-specific.
  • Kethan Razdan noted that the IESG does not mandate moving advanced work to new WGs.

Configurable DWDM Optical Interfaces

Presentation: 01 - A YANG data model to manage configurable DWDM optical interfaces Draft: draft-ietf-ccamp-dwdm-if-param-yang

• Roberto Manzotti reported that the draft is mature and addressing final YANG Doctor and Routing Directorate comments.
• Recent fixes include standardizing YANG formatting and adding must statements for threshold clears.
• Discussion on Pluggables: The chairs raised the question of coordination with draft-ietf-ccamp-actn-wdm-pluggable-modelling.
• Italo Busi and Kethan Razdan discussed the "YANG bis" problem, emphasizing that while the model is stable, the WG should avoid long delays for minor attributes that could be handled via augmentation or a streamlined revision process currently being discussed in the OPS area.

Performance Management (PM) Streaming

Presentation: 05 - A YANG Data Model of Performance Management Streaming

• Bin Yoon presented updates on the draft, which is currently in the working group adoption process.
• The model defines three measurement methods: counter, snapshot, and tide-mark.
• Updates include simplifying transient thresholds to a single value and clarifying the behavior of standing vs. recess thresholds.
• Minshuo Xia requested more detailed examples and use cases in the document to explain the thresholding types.

Microwave Radio Link

Presentation: (Anticipated from Session II) Draft: draft-mansfield-ccamp-microwave-radio-link-bis

• Scott Mansfield presented the "bis" version of the microwave radio link model (updating RFC 8561).
• Changes include using new common YANG data types, adding expected far-end IDs for connectivity checks, and rationalizing coding/modulation identities.
• The authors are seeking working group adoption for this mature work.

Decisions and Action Items

• Draft Adoption: The adoption process for the PM Streaming draft has started with an IPR poll.
• WGLC: draft-ietf-ccamp-flexigrid-yang is ready for Working Group Last Call. draft-ietf-ccamp-dwdm-if-param-yang is next in the queue for WGLC once final issues are resolved.
• Coordination: Deborah Brungard and Scott Mansfield will coordinate the response to the ITU-T liaison on modeling with the TEAS WG.

Next Steps

• Authors of draft-ietf-ccamp-wdm-tunnel-yang to complete review of 3R regenerator scenarios and add architectural diagrams.
• Authors of draft-ietf-ccamp-yang-otn-slicing to discuss hierarchical NRPs with the authors of the TEAS Composite Slice draft.
• The second CCAMP session will focus on individual drafts and new work.

Session Date/Time: 17 Mar 2026 03:30

CCAMP

Summary

The CCAMP working group met during IETF 120 to discuss updates to optical network management, specifically focusing on optical pluggable modeling, the integration of AI agents (NMA) into the ACTN framework, and computation-aware traffic steering (CATS) for optical transport. Other significant topics included YANG models and path computation requirements for Fine-Grain OTN (FG-OTN) and performance data sharing in WSON.

Key Discussion Points

1. Data Modelling and Gap Analysis of Optical Pluggables

Presenter: Nigel Davis Draft: draft-ietf-ccamp-actn-wdm-pluggable-modelling Slides: WDM pluggable modelling

• Nigel Davis reported progress since the working group adoption. The work is utilizing a Google Sheet to track detailed pluggable attributes (capabilities, configuration, state, and PM).
• The focus remains on the "line side" (photonics) to ensure interoperability. The goal is to reuse existing IETF YANG models where possible and only develop new models if significant gaps are identified.
• Future work will address the "backside" of the plug (host-to-plug bus), multi-vendor interoperability challenges, and proprietary properties.
• Discussion: Rod Van Meter inquired about access to the Google Sheet; Nigel Davis provided a corrected, publicly readable link during the session.

2. Integration of Network Management Agents (NMA) into ACTN

Presenter: Xing Zhao Draft: draft-zhao-ccamp-nma-enhanced-actn Slides: 05 - A YANG Data Model of Performance Management Streaming (Note: While the slide title in the list is "Performance Management Streaming," the presentation content focused on NMA integration).

• Xing Zhao proposed an enhanced ACTN framework that integrates AI-based Network Management Agents (NMA) to create autonomous closed-loops.
• NMAs would be embedded into CNC, MDSC, and PNC layers without replacing existing functional modules, ensuring backward compatibility.
• New interface requirements (extended CMI, MPI, SBI) were defined to support agent-oriented conversational interfaces.
• Discussion: Daniele Ceccarelli noted that the draft contains both CCAMP-specific and general NMA material. He suggested that while current work should stay together, future iterations might see some material move to the NMOP working group. Haomian Zheng agreed that CCAMP should focus on optical-specific parameters within this framework.

3. Computation-Aware Traffic Steering (CATS) in OTN

Presenter: Minxue Wang Draft: draft-wang-ccamp-cats-optical-transport Slides: Framework and Data Model for OTN Network Slicing (Note: Presentation content was CATS-focused).

• Minxue Wang discussed extending the CATS framework into the optical domain to support deterministic transport for workloads like AI training and high-performance computing.
• The proposal involves mapping service flows into optical containers (ODUk, FG-OTN) and making path selection decisions based on both compute metrics (GPU load, memory) and optical metrics (latency, wavelength availability).
• Discussion: Haomian Zheng noted that this work bridges a long-standing gap in coordinating computation and network orchestration (referencing past CSO and ALTO work). Daniele Ceccarelli commended the comparison between CATS and optical transport provided in the slides.

4. YANG Data Model for FG-OTN

Presenter: Yanxia Fu Draft: draft-yu-ccamp-fg-otn-yang Slides: 01 - A YANG data model to manage configurable DWDM optical interfaces (Note: Presentation content was FG-OTN YANG).

• Updates included a new fg-otn-types model and refinements to topology and tunnel models to support FG-ODUflex.
• The model introduces a TS-list data type for timeslot patterns and includes logic for hitless resizing of bandwidth.
• Next Steps: The authors requested working group adoption.

5. Path Computation Requirements for Fine-Grain Transport

Presenter: Minxue Wang Draft: draft-wang-pce-fg-transport-pcep-requirements Slides: N/A (Presented following the FG-OTN YANG discussion).

• The draft outlines requirements for PCEP extensions to handle the massive increase in channel counts and dynamic changes inherent in FG-OTN and FG-MTN.
• Discussion: Fatai Zhang recommended explicitly using the terms "FG-OTN" and "FG-MTN" rather than the more generic "Fine-Grain Transport" to avoid confusion, as ITU-T defines the specific technologies. Daniele Ceccarelli questioned whether the requirements should reside in CCAMP or PCE; the authors will coordinate between the two groups.

6. WSON Impairment Data Sharing

Presenter: Sugang Xu Draft: draft-xu-ccamp-wson-impairment-data-sharing Slides: A YANG Data Model for WDM Tunnels (Note: Presentation content was WSON Impairment Sharing).

• The presentation addressed the challenge of optical impairment accumulation (OSNR, non-linear noise) across administrative domains.
• Sugang Xu proposed a framework for cross-domain data sharing to facilitate faster restoration and SLA responsibility attribution.
• Discussion: Italo Busi and Daniele Ceccarelli questioned the operational scenario, noting that peering at the WDM layer across different carriers is unusual. Roberto Manzotti mentioned that the IOWN Global Forum is exploring such scenarios. The chairs suggested seeking feedback from operators to validate the use case.

Decisions and Action Items

• Agenda Change: The presentation by Scott Mansfield was moved to the previous session, and Nigel Davis’s presentation was moved to the first slot of this session.
• Draft Adoption: No formal polls for adoption were taken during the session due to time constraints. The chairs will manage the backlog of adoption requests based on the priority list identified during the first session.

Next Steps

• Authors of draft-yu-ccamp-fg-otn-yang to update JSON examples on GitHub.
• Coordination between CCAMP and PCE chairs regarding the placement of requirements for fine-grain transport path computation.
• WSON impairment sharing authors to seek operator input on the multi-carrier peering scenario.

Related Documents

draft-ietf-ccamp-actn-wdm-pluggable-modelling, draft-ietf-ccamp-dwdm-if-param-yang, draft-ietf-ccamp-flexigrid-yang, draft-ietf-ccamp-optical-path-computation-yang, draft-ietf-ccamp-wdm-tunnel-yang, draft-ietf-ccamp-yang-otn-slicing, draft-mansfield-ccamp-microwave-radio-link-bis, draft-wang-ccamp-cats-optical-transport, draft-wang-pce-fg-transport-pcep-requirements, draft-xu-ccamp-wson-impairment-data-sharing, draft-yu-ccamp-fg-otn-yang, draft-zhao-ccamp-nma-enhanced-actn