CCAMP

Summary

This interim meeting of the CCAMP Working Group was held in lieu of an IETF 122 session due to an overlap with an ITU meeting. The agenda focused on optical, pluggable, and WDM-related documents. Key discussions included the transition of the Area Director, an overview of pending document status, and presentations on three active drafts: coherent pluggable modeling, optical impairment-aware topology, and a YANG model for configurable DWDM optical interfaces. Decisions were made regarding the progression of RFC 1993bis and the optical impairment topology draft.

Key Discussion Points

IETF 122 Interim Meeting Rationale: The working group is not meeting in person at IETF 122 (Bangkok) due to an overlap with an ITU meeting, which many CCAMP participants attend. Two interim virtual meetings are scheduled: this one (focused on optical, pluggable, and WDM documents) and a second one on April 10th (focused on OTN documents).
Area Director Transition: Katan announced as the new Area Director (AD) for CCAMP, taking over from John. Appreciation was extended to John for his four years of service as AD.
Document Status Overview:
- RFC 1993bis: This document's progression is linked to the optical impairment topology draft, as changes to the latter will impact YANG descriptions in 1993bis. A second, shorter (1-week) Working Group Last Call (WGLC) is planned for 1993bis after these updates are incorporated.
- Layer 1 Types: This draft is blocked in the editor queue, awaiting an update to RFC 8776 (TE) which is nearing completion. This will subsequently unblock two other drafts: Layer 1 CSM and OTN Topology YANG.
- Working Group Priorities:
  - Priority 1 for WGLC: Optical Impairment Topology and RFC 1993bis.
  - Next for WGLC: WDM Tunnel YANG, which is currently undergoing YANG Doctor and routing director reviews, expected by early March.
Coherent Pluggable Modeling (Presented by Raza Rahman):
- Problem Statement: To model optical (coherent) pluggables by leveraging attributes defined in various SDOs (IETF, OpenConfig, ITU, OIF) across three categories: capability, configuration, and PM/state data. These attributes are exposed via the host's (e.g., router) northbound interface.
- Methodology: A Google Sheet is being used to collect and categorize these attributes, indicating their source and type.
- Progress Since IETF 121:
  - First review of pluggable attributes (capability, configuration, PM/state) is complete.
  - Second revision is underway with contributions from Esther.
  - A pull request capturing proposed changes from IETF 121 has been created and largely simplified.
- Next Steps:
  - Complete the Google Sheet (target: IETF 123).
  - Perform a Gap Analysis between identified attributes and existing IETF YANG models.
  - Propose methods to address any identified gaps (e.g., augmentation or updates to existing models).
  - Prepare the next version of the draft for working group adoption, incorporating further comments received via pull requests.
Optical Impairment Aware Topology Model and RFC 1993bis (Presented by Sergio Belotti):
- Optical Impairment Topology Draft:
  - Working Group Last Call (WGLC) ended on February 14th.
  - Comments from Derer and G were received, primarily requesting clarification and better descriptions for certain attributes in RFC 1993bis (which are used by the impairment draft). These involve updating YANG description statements.
  - G's comments also requested changing terminology in the impairment draft itself (e.g., "transmitter" to "transceiver," "steps" to "granularity," and renaming "transceiver tunability" to "transceiver tunability granularity").
- RFC 1993bis:
  - Passed WGLC and was submitted to the IESG for publication.
  - The comments received during the optical impairment topology WGLC have implications for RFC 1993bis, requiring post-WGLC changes.
- Process Discussion: The co-authors suggested implementing these changes as post-WGLC updates within the IETF last call process for 1993bis. The chairs confirmed that a short (1-week) WGLC will be conducted for 1993bis after the changes are implemented to ensure consensus. Changes for both drafts will be made in parallel due to their dependency.
YANG Data Model for Configurable DWDM Optical Interfaces (Presented by Roberto D'Ambrosio for Gabriel Ropero):
- Scope & Changes: The draft's title and scope were slightly expanded to cover general DWDM interface configuration.
  - Terminology in the text was updated to refer to DWDM transceivers.
  - The definition of transceiver working modes (current to configure mode) was clarified.
  - The document was aligned with the RFC 8407bis template, reorganizing sections, updating security and module classification, and moving the YANG tree to an appendix.
  - YANG module, grouping, and leaf names were simplified for clarity.
  - Minor YANG model errors were fixed.
- Relationship with other drafts:
  - Complements topology models by providing monitoring and configuration for optical parameters on DWDM interfaces.
  - Focuses primarily on the device-to-controller management interface.
  - Refers to RFC 1993bis for layer zero type definitions.
  - The work on coherent pluggables (Raza's draft) is seen as highly related; this draft addresses managing DWDM interfaces, while the pluggable work is broader in identifying all possible optical parameters and gaps. It is anticipated that the pluggable work may identify parameters requiring extensions or augmentations to this model.
- Dependency Strategy: The authors clarified that while this draft depends on 1993bis, they aimed to avoid requiring additional changes to 1993bis through careful review. The current strategy is to progress this document to completion, and then address any gaps identified by the pluggable work through extensions or augmentations to this model.
- Next Steps: Fix remaining open issues (tracked on GitHub), undergo a YANG Doctor review, and then move towards WGLC.

Decisions and Action Items

Area Director Transition: Katan officially takes over as the new CCAMP Area Director.
RFC 1993bis / Optical Impairment Topology Alignment:
- Decision: Changes to the YANG description statements in RFC 1993bis and related textual updates in the optical impairment topology draft will be implemented in parallel to ensure alignment.
- Action: After incorporating these changes, RFC 1993bis will undergo a second, shorter (1-week) Working Group Last Call to confirm consensus before proceeding to IESG publication.

Next Steps

Working Group:
- The second interim meeting, focused on OTN documents, is scheduled for April 10th.
Coherent Pluggable Modeling:
- Complete the Google Sheet for attribute tracking (target: by IETF 123).
- Conduct a Gap Analysis against existing IETF YANG models.
- Define methods to address identified gaps (e.g., augmentations).
- Prepare and publish the next version of the draft for working group adoption.
Optical Impairment Aware Topology:
- Update version 17 to incorporate comments received during the WGLC.
- Ensure strict alignment with the simultaneous updates being made to RFC 1993bis.
- Upload the new version in preparation for the IETF Last Call process.
RFC 1993bis:
- Implement the required improvements and changes stemming from the optical impairment topology WGLC comments.
- Run a 1-week Working Group Last Call for these post-WGLC changes.
- Proceed with the IESG publication process.
YANG Data Model for Configurable DWDM Optical Interfaces:
- Address and fix all remaining open issues.
- Undergo a YANG Doctor review.
- Move towards a Working Group Last Call.

Session Date/Time: 17 Feb 2025 14:00

CCAMP

Summary

Key Discussion Points

IETF 122 Interim Meeting Rationale: The working group is not meeting in person at IETF 122 (Bangkok) due to an overlap with an ITU meeting, which many CCAMP participants attend. Two interim virtual meetings are scheduled: this one (focused on optical, pluggable, and WDM documents) and a second one on April 10th (focused on OTN documents).
Area Director Transition: Katan announced as the new Area Director (AD) for CCAMP, taking over from John. Appreciation was extended to John for his four years of service as AD.
Document Status Overview:
- RFC 1993bis: This document's progression is linked to the optical impairment topology draft, as changes to the latter will impact YANG descriptions in 1993bis. A second, shorter (1-week) Working Group Last Call (WGLC) is planned for 1993bis after these updates are incorporated.
- Layer 1 Types: This draft is blocked in the editor queue, awaiting an update to RFC 8776 (TE) which is nearing completion. This will subsequently unblock two other drafts: Layer 1 CSM and OTN Topology YANG.
- Working Group Priorities:
  - Priority 1 for WGLC: Optical Impairment Topology and RFC 1993bis.
  - Next for WGLC: WDM Tunnel YANG, which is currently undergoing YANG Doctor and routing director reviews, expected by early March.
Coherent Pluggable Modeling (Presented by Raza Rahman):
- Problem Statement: To model optical (coherent) pluggables by leveraging attributes defined in various SDOs (IETF, OpenConfig, ITU, OIF) across three categories: capability, configuration, and PM/state data. These attributes are exposed via the host's (e.g., router) northbound interface.
- Methodology: A Google Sheet is being used to collect and categorize these attributes, indicating their source and type.
- Progress Since IETF 121:
  - First review of pluggable attributes (capability, configuration, PM/state) is complete.
  - Second revision is underway with contributions from Esther.
  - A pull request capturing proposed changes from IETF 121 has been created and largely simplified.
- Next Steps:
  - Complete the Google Sheet (target: IETF 123).
  - Perform a Gap Analysis between identified attributes and existing IETF YANG models.
  - Propose methods to address any identified gaps (e.g., augmentation or updates to existing models).
  - Prepare the next version of the draft for working group adoption, incorporating further comments received via pull requests.
Optical Impairment Aware Topology Model and RFC 1993bis (Presented by Sergio Belotti):
- Optical Impairment Topology Draft:
  - Working Group Last Call (WGLC) ended on February 14th.
  - Comments from Derer and G were received, primarily requesting clarification and better descriptions for certain attributes in RFC 1993bis (which are used by the impairment draft). These involve updating YANG description statements.
  - G's comments also requested changing terminology in the impairment draft itself (e.g., "transmitter" to "transceiver," "steps" to "granularity," and renaming "transceiver tunability" to "transceiver tunability granularity").
- RFC 1993bis:
  - Passed WGLC and was submitted to the IESG for publication.
  - The comments received during the optical impairment topology WGLC have implications for RFC 1993bis, requiring post-WGLC changes.
- Process Discussion: The co-authors suggested implementing these changes as post-WGLC updates within the IETF last call process for 1993bis. The chairs confirmed that a short (1-week) WGLC will be conducted for 1993bis after the changes are implemented to ensure consensus. Changes for both drafts will be made in parallel due to their dependency.
YANG Data Model for Configurable DWDM Optical Interfaces (Presented by Roberto D'Ambrosio for Gabriel Ropero):
- Scope & Changes: The draft's title and scope were slightly expanded to cover general DWDM interface configuration.
  - Terminology in the text was updated to refer to DWDM transceivers.
  - The definition of transceiver working modes (current to configure mode) was clarified.
  - The document was aligned with the RFC 8407bis template, reorganizing sections, updating security and module classification, and moving the YANG tree to an appendix.
  - YANG module, grouping, and leaf names were simplified for clarity.
  - Minor YANG model errors were fixed.
- Relationship with other drafts:
  - Complements topology models by providing monitoring and configuration for optical parameters on DWDM interfaces.
  - Focuses primarily on the device-to-controller management interface.
  - Refers to RFC 1993bis for layer zero type definitions.
  - The work on coherent pluggables (Raza's draft) is seen as highly related; this draft addresses managing DWDM interfaces, while the pluggable work is broader in identifying all possible optical parameters and gaps. It is anticipated that the pluggable work may identify parameters requiring extensions or augmentations to this model.
- Dependency Strategy: The authors clarified that while this draft depends on 1993bis, they aimed to avoid requiring additional changes to 1993bis through careful review. The current strategy is to progress this document to completion, and then address any gaps identified by the pluggable work through extensions or augmentations to this model.
- Next Steps: Fix remaining open issues (tracked on GitHub), undergo a YANG Doctor review, and then move towards WGLC.

Decisions and Action Items

Area Director Transition: Katan officially takes over as the new CCAMP Area Director.
RFC 1993bis / Optical Impairment Topology Alignment:
- Decision: Changes to the YANG description statements in RFC 1993bis and related textual updates in the optical impairment topology draft will be implemented in parallel to ensure alignment.
- Action: After incorporating these changes, RFC 1993bis will undergo a second, shorter (1-week) Working Group Last Call to confirm consensus before proceeding to IESG publication.

Next Steps

Working Group:
- The second interim meeting, focused on OTN documents, is scheduled for April 10th.
Coherent Pluggable Modeling:
- Complete the Google Sheet for attribute tracking (target: by IETF 123).
- Conduct a Gap Analysis against existing IETF YANG models.
- Define methods to address identified gaps (e.g., augmentations).
- Prepare and publish the next version of the draft for working group adoption.
Optical Impairment Aware Topology:
- Update version 17 to incorporate comments received during the WGLC.
- Ensure strict alignment with the simultaneous updates being made to RFC 1993bis.
- Upload the new version in preparation for the IETF Last Call process.
RFC 1993bis:
- Implement the required improvements and changes stemming from the optical impairment topology WGLC comments.
- Run a 1-week Working Group Last Call for these post-WGLC changes.
- Proceed with the IESG publication process.
YANG Data Model for Configurable DWDM Optical Interfaces:
- Address and fix all remaining open issues.
- Undergo a YANG Doctor review.
- Move towards a Working Group Last Call.