Re: [Teas] WG Adoption Poll - draft-king-teas-applicability-actn-slicing-10

Daniele Ceccarelli <daniele.ceccarelli@ericsson.com> Thu, 02 September 2021 11:54 UTC

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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: "adrian@olddog.co.uk" <adrian@olddog.co.uk>, 'Vishnu Pavan Beeram' <vishnupavan@gmail.com>, 'TEAS WG' <teas@ietf.org>
CC: 'TEAS WG Chairs' <teas-chairs@ietf.org>
Thread-Topic: [Teas] WG Adoption Poll - draft-king-teas-applicability-actn-slicing-10
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Archived-At: <https://mailarchive.ietf.org/arch/msg/teas/tjinXfPZIry9jKM6rhuMPHdBcRk>
Subject: Re: [Teas] WG Adoption Poll - draft-king-teas-applicability-actn-slicing-10
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Hi Adrian,

Good point, you’re right...not accurate from my side.

Since ACTN, in addition to being a framework, is also suggesting which models to use, when I speak about ACTN I’m implying also the usage of those models: i.e. service network models (LxNM), TE models (TE topo, TE tunnel, VN) and the TE service mapping etc.

I’m referring to draft-ietf-teas-actn-yang-07<https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-yang-07> section 4.1 for the CMI and 4.2 for the MPI.



I don’t have anything against the usage of this model as service model, but I see competition with the existing ones as a network model.

I think Kenichi explained it extremely well in his mail:



“1) According to Figure 1 of draft-king-teas-applicability-actn-slicing-10, NSC NBI can be replaced with CMI. If the new nbi is created, we have to parallelly implement two nbis or just wrap CMI with NSC NBI. From one of mobile operators' capex perspective, we don't want to do such effort, since we believe major ietf network slice requirements can be covered by ACTN.”



BR
Daniele







From: Adrian Farrel <adrian@olddog.co.uk>
Sent: den 2 september 2021 11:54
To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>om>; 'Vishnu Pavan Beeram' <vishnupavan@gmail.com>om>; 'TEAS WG' <teas@ietf.org>
Cc: 'TEAS WG Chairs' <teas-chairs@ietf.org>
Subject: RE: [Teas] WG Adoption Poll - draft-king-teas-applicability-actn-slicing-10

Hi again Daniele,

> That’s a quibble that only solves the issue partially.
> Should we use ACTN to do network slicing in networks that support
> ACTN and the Network Slicing NBI model in networks that’s don’t
> support it?

You are comparing two things that are not the same.
The Network Slicing NBI is a YANG model for use on the customer service interface. That is, it allows the customer and provider to communicate about the network slice that is to be provided.
ACTN is an architecture. That is, it describes how the management components may be arranged/structured to deliver function in a network.

You can use the Network Slicing NBI at an interface in the ACTN architecture.
It could be used at the CMI (in the same way that the L3SM and L2SM can be): see Section 4.1.
Or it could be used above the CNC: see Section 4.2

Best,
Adrian