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

[Daniele Ceccarelli <[e-mail]>]

Hi,

 

I would agree with Italo.

We deliberately kept the layer0-types draft “on hold” (even if ready to be
progressed) just in case we discovered any last minute change required by
other ongoing work, but it makes sense to me to progress it along with
documents a,b,c,d as a first cluster.

One thing we need to further understand is to how to split the content among
them. I’m referring to e.g. the point raised by Dieter some days back on
where to define the transponders.

Opinions on this aspect?

 

BR

Daniele  

 

From: Italo Busi <[e-mail]> 
Sent: den 24 mars 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: 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

[e-mail] <mailto:[e-mail]>