[Cats] Re: Introduction to the status of draft-fu-cats-oam-fw-05 and encourage more discussions

[李振强 <[e-mail]>]

Hello Quan and all,

As a co-author of this document, I also believe it is ready for WG adoption, which is also suggested by our WG Chair Adrian.


The below refinements will be incorporated into the upcoming revision:
1. Two new components are introduced in this framework draft, which can be integrated with existing entities defined in the CATS architecture draft upon deployment.
2. We will strengthen the association between the framework’s layering model and the two new components by specifying per-layer OAM tasks for each component to further clarify the whole architecture.


More comments and feedback are welcome.


Best Regards,
Zhenqiang Li
China Mobile



----邮件原文----

发件人："张宾" <[e-mail]>

收件人："xiong.quan" <[e-mail]>

抄　送: cats <[e-mail]>

发送时间：2026-06-01 15:04:36

主题：[Cats] Re: Introduction to the status of draft-fu-cats-oam-fw-05 and encourage more discussions





Dear Quan,


 

  Through reading this document, I think SI-OAM Component is fit for the service metrics collection defined in draft-zhangb-cats-service-metrics-op-01 - Computing Service Metric Definitions and Operation under CATS. Also I think the update policy of our proposed service-oriented metrics in large-scale deployments as you put forward is more proper to be formulated and Standardized in this document, which we can give some suggestions if our proposal can be supported by the WG in the future. We also note that the SI-OAM Component described in your draft represents a service-oriented metrics construct that is fundamentally aligned with the core principles underlying our service metrics definition.







Best Regards,

Bin 










-----原始邮件-----
 发件人: [e-mail]
 发送时间: 2026-05-28 15:36:35 (星期四)
 
 收件人: [e-mail], [e-mail]
 主题: [Cats] Introduction to the status of draft-fu-cats-oam-fw-05 and encourage more discussions
 





Dear All,





As suggested by the chairs, I'd like to provide a brief introduction to the status of this document to help everyone to better understand its content and encourage further feedback in the mailing list.




https://datatracker.ietf.org/doc/draft-fu-cats-oam-fw/05/




This document (draft-fu-cats-oam-fw-05) proposes an Operations, Administration, and Maintenance (OAM) framework for Computing-Aware Traffic Steering (CATS) systems. It addresses the limitations of traditional network-centric OAM by introducing a multidimensional approach that integrates both network and computing resource monitoring.




Motivation and Problem Statement:

The framework is designed to prevent "service black-holing," where traffic is directed to service instances that are network-reachable but computationally unresponsive. It enables real-time correlation of network metrics with computing metrics to support accurate steering decisions and ensure services are both reachable and performing as expected.




Key Components:

A four-layer OAM model: Link OAM (physical connectivity), Path OAM (transport paths), Instance OAM (service instance liveness and computing metrics), and Service OAM (end-to-end service delivery)

Two functional components: SI-OAM for service instance monitoring and SVC-OAM for end-to-end service verification

Comprehensive OAM requirements: aligned with the operational and management guidelines in [I-D.draft-opsarea-rfc5706bis]




This document has been presented at IETF #124 and #125. We sincerely appreciate the valuable feedback and suggestions received from Adrian Farrel, Erum Welling, Cheng Li, Peng Liu, Haomian Zheng, and other participants. The authors have revised the draft through multiple versions (00 to 05) to incorporate this feedback. Since the last presentation at IETF 125, no further comments have been raised.




The authors welcome additional review and constructive discussion, and we look forward to your feedback as we consider this draft for potential adoption by the CATS working group.Thanks!




Best Regards,

Quan