Re: [Teas] WG adoption - draft-nsdt-teas-ietf-network-slice-definition

["Rokui, Reza (Nokia - CA/Ottawa)" <[e-mail]>]

Hi PSF,

I do not think the scenario is a valid case. We need to distinguish between the “IETF Network Slice” define and its realization in the network. Your example is related to realization of an “IETF Network slice”.
The creation of IETF network slice is not triggered by path computation in the network. As described in the draft, the IETF network slice is technology agnostic and describes the connectivity between various endpoints.
Path computation is technology specific.

Reza



From: Teas <[e-mail]> on behalf of "[e-mail]" <[e-mail]>
Date: Sunday, January 17, 2021 at 9:55 PM
To: Reza Rokui <[e-mail]>
Cc: Reza Rokui <[e-mail]>, "[e-mail]" <[e-mail]>, "[e-mail]" <[e-mail]>
Subject: Re: [Teas] WG adoption - draft-nsdt-teas-ietf-network-slice-definition




Hi Reza,



Thank you for your reply.



One scenario may be that the network controller received the path computation request from the headend, and because the constraints are too strict, the network controller may create the corresponding slice independently, and then report the created slice to the NSC. Or, the network controller can also request NSC for a slice. Isn't that possible?



Regards,

PSF


原始邮件
发件人：Rokui,Reza(Nokia-CA/Ottawa)
收件人：彭少富10053815;[e-mail];[e-mail];
抄送人：Rokui, Reza (Nokia - CA/Ottawa);
日 期 ：2021年01月15日 11:26
主 题 ：Re: [Teas] WG adoption - draft-nsdt-teas-ietf-network-slice-definition
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PSF,

If such a use-cases exist (I am not aware of any use-cases), the current draft address them. As Joel mentioned, if (for some use-cases) the network decides to create a new “IETF network slice” between various endpoints, this request will be find its way to the NBI of “IETF Network Slice Controller” (NSC) and whatever mentioned in draft is still valid. How this request gets to the NSC NBI is out-of-scope of the draft. Any method can be use.

IMO, such a request from network should not go from NSC SBI to NBI. It is not correct. The only information travel from SBI to NBI should be related to “IETF network slice” assurance (i.e. monitoring data from the network).

Cheers,

Reza



From: Teas <[e-mail]> on behalf of "[e-mail]" <[e-mail]>
Date: Thursday, January 14, 2021 at 10:06 PM
To: "[e-mail]" <[e-mail]>
Cc: "[e-mail]" <[e-mail]>
Subject: Re: [Teas] WG adoption - draft-nsdt-teas-ietf-network-slice-definition




Hi Joel,



Thanks for your attention.

Here, as the direction of the request is from south to north, do you think whether the definition document need to describe this case ?

If so, the request would be very different with that is discribed in the current document. In detailed, it is sent through technology-specific interface between headend and network controller, then the network contoller may continue to request a slice from NSC, or report the created slice to NSC through technology-specific interface.



Regards,

PSF


原始邮件
发件人：JoelM.Halpern
收件人：彭少富10053815;
抄送人：[e-mail];
日 期 ：2021年01月15日 10:18
主 题 ：Re: [Teas] WG adoption - draft-nsdt-teas-ietf-network-slice-definition
Given that station in the case below is making a request, isn't it
reasonable to assume that the request makes its way to the control
systems, which then handle the itneraction with the underlay network
through the mechanisms proposed in the definitions and framework drafts?

Yours,
Joel

On 1/14/2021 9:08 PM, [e-mail] wrote:
>
> A little comment:
>
>
> It seems that the definition document only support that the realization
> of IETF network slice is triggered by the consumer through the interface
> to NSC with specific SLO. I think it is not enough. Please see if it is
> needed to support the case for a network device (the headend) to
> explicitly request a slice on demand, and request a connection path
> within the specific slice on demand.
>
>
> Regards,
>
> PSF
>
>
> 原始邮件
> *发件人：*VishnuPavanBeeram
> *收件人：*TEAS WG;
> *抄送人：*TEAS WG Chairs;
> *日 期 ：*2021年01月04日 22:02
> *主 题 ：**[Teas] WG adoption -
> draft-nsdt-teas-ietf-network-slice-definition*
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> All,
>
> This is start of a two week poll on making
> draft-nsdt-teas-ietf-network-slice-definition-02 a TEAS working group
> document.
> Please send email to the list indicating "yes/support" or "no/do not
> support". If indicating no, please state your reservations with the
> document. If yes, please also feel free to provide comments you'd
> like to see addressed once the document is a WG document.
>
> The poll ends January 18th.
>
> Thanks,
> Pavan and Lou
>
>
>
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