Re: [CCAMP] Summary of the CCAMP meeting on Optical Impairment Topology YANG model

[Italo Busi <[e-mail]>]

We have discussed the issue of phasing and versioning the layer0-types during the optical-impairments draft weekly call today

Based on the discussion, it seems that the preferred option is something in between the first and second option, where a new module/draft is started with the content of layer0-types which is not mature to be published in the first phase (named as something like 'ietf-layer0-types-ext') and, once the layer0-types is published as an RFC, to merge this module within an updated version of the layer0-types which could then be published as an RFC that updates the version 1 of layer0-types

This is described in the added slide 4 of: https://github.com/ietf-ccamp-wg/draft-ietf-ccamp-layer0-types/files/4390041/versioning-01.pptx

We would like to get further comments/opinions from the WG about this proposal

Thanks

Italo (on behalf of the participants to today's call)

Italo Busi
Principal Optical Transport Network Research Engineer
Huawei Technologies Co., Ltd.
Tel : [phone]
Email : [e-mail]
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From: Italo Busi [mailto:[e-mail]]
Sent: martedì 24 marzo 2020 10:46
To: Belotti, Sergio (Nokia - IT/Vimercate) <[e-mail]>; Beller, Dieter (Nokia - DE/Stuttgart) <[e-mail]>; [e-mail]; [e-mail]; Griseri, Enrico (Nokia - IT/Vimercate) <[e-mail]>; Kelly, Colin (Nokia - CA/Ottawa) <[e-mail]>; Gabriele Maria Galimberti (ggalimbe) <[e-mail]>; ([e-mail]) <[e-mail]>; Aihua Guo <[e-mail]>
Cc: Daniele Ceccarelli <[e-mail]>; Fatai Zhang <[e-mail]>; CCAMP <[e-mail]>; Zhenghaomian <[e-mail]>
Subject: Re: [CCAMP] Summary of the CCAMP meeting on Optical Impairment Topology YANG model

Sergio, CCAMP WG,

The proposals are assuming that in the first phase a set of RFCs are published (drafts a, b, c and d, together with layer0-types), to cover the 'spectrum allocation' scenarios.

Do we all agree with the proposed phasing approach?

I think it makes a lot of sense since this model is quite mature (there as few WG LC comments that I guess can be easily and quickly addressed) and allows covering many, even if not all, the use cases that I have seen being requested and deployed

Regarding the versioning issue, I have uploaded on github few slides trying to clarifying the different options:

https://github.com/ietf-ccamp-wg/draft-ietf-ccamp-layer0-types/files/4374340/versioning-00.pptx

I have added a third option where two versions of layer0-types modules are developed in parallel with different revision dates

A fourth option is to follow the guidelines under development by the Versioning DT in Netmod WG but I am not sure how mature they are as well as if they are supported by existing YANG tools

Italo

Italo Busi
Principal Optical Transport Network Research Engineer
Huawei Technologies Co., Ltd.
Tel : [phone]
Email : [e-mail]<mailto:[e-mail]>
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From: Belotti, Sergio (Nokia - IT/Vimercate) [mailto:[e-mail]]
Sent: venerdì 20 marzo 2020 19:07
To: Beller, Dieter (Nokia - DE/Stuttgart) <[e-mail]<mailto:[e-mail]>>; [e-mail]<mailto:[e-mail]>; [e-mail]<mailto:[e-mail]>; Italo Busi <[e-mail]<mailto:[e-mail]>>; Griseri, Enrico (Nokia - IT/Vimercate) <[e-mail]<mailto:[e-mail]>>; Kelly, Colin (Nokia - CA/Ottawa) <[e-mail]<mailto:[e-mail]>>; Gabriele Maria Galimberti (ggalimbe) <[e-mail]<mailto:[e-mail]>>; ([e-mail]<mailto:[e-mail]>) <[e-mail]<mailto:[e-mail]>>; Aihua Guo <[e-mail]<mailto:[e-mail]>>
Cc: Daniele Ceccarelli <[e-mail]<mailto:[e-mail]>>; Fatai Zhang <[e-mail]<mailto:[e-mail]>>; CCAMP <[e-mail]<mailto:[e-mail]>>; Zhenghaomian <[e-mail]<mailto:[e-mail]>>
Subject: Summary of the CCAMP meeting on Optical Impairment Topology YANG model

During the meeting the major topic been discussed was related to the e-mail exchange regarding [CCAMP] WG last call on draft-ietf-ccamp-wson-yang-23 and in particular the issue raise by Dieter with the mail sent March 10 on , regarding the alignment among the different L0 YANG models with respect ietf-layer0-types.

These are the list of drafts we need to consider
a)       ietf-ccamp-wson-yang;
b)      ietf-ccamp-flexigrid-yang;
c)       ietf-ccamp-wson-tunnel;
d)      ietf-ccamp-flexigrid-media-channel-yang;
e)       ietf-dwdm-if-param-yang;
f)        ietf-ccamp-optical-impairment-topology-yang

There are practically two options on the table:
1)      Go ahead to publish ietf-layer0-types as reference "types" module for the set of drafts addressing "only" specific use cases that basically is  "spectrum allocation" (a,b,c d drafts) , creating in parallel a new ietf-layer0-types-xxx that can be used for ietf-dwdm-if-param-yang and ietf-ccamp-optical-impairment-topology-yang.
In this solution there is the problem to understand if the use case claimed to be supported is possible without e.g. transpoder information like the ones contained in the e, f drafts.
2)      Use "versioning" YANG paradigm, this solution permits to move ahead in parallel two version of the same files "types", and v2 will incorporate all the needed update for e and f drafts.

Before to take any choice, attendees of the call  decided that a careful review of the ietf-layer0-types is needed to understand possible gaps with respect all optical impairments and transponders description .
Moreover a new issue will be open in the ietf-layer0-types github to report optical impairments related comments/concerns.
Attached the e-mail exchange I mentioned at the beginning.

Feel free to amend and add what is missing.

Thanks
Sergio

Sergio Belotti
Senior System Engineer and Standardization Architect
IP/Optical Networks, Optics BU
Nokia
M: [phone]
Via Energy Park, 20871 Vimercate (MB) , Italy
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