Subject: [Teas] Network Slice vs. VPN(+) RE: network Slice Endpoint in draft-ietf-teas-ietf-network-slice-definition-00

From: <[email-masked]>
Date: Wed, 3 Mar 2021 13:27:33 +0000

Hi Adrian, all,

Picking this item from the message below as I think this is a point that is worth to be clarified and discussed in the framework/definition document. We need to explain the differences between the two concepts. There are some “hints” in the framework I-D, but we need to be explicit.

VPN(+) is no more than an IETF technology to implement a network slice. As such, a network slice can be implemented without relying upon a VPN/VPN+. That’s deployment-specific. An example of possible implementations (with IETF technologies) would be to define PDBs + SFCs or running a dedicated MT-IGP instance (with optimized tweaking such as exclude links exposing long delays) + resource-based access, and so on.

Ah, let’s not forget that a network slice as defined in the definition I-D is not only about connectivity.

BTW, we do still have some inconsistencies between the documents:

·         The definition I-D acks that an IETF network slice is not only about connectivity.

·         The framework I-D seems to be more connectivity-centric.

We need to fix this as well.

Cheers,
Med

De : Teas [mailto:[email-masked]] De la part de Adrian Farrel
Envoyé : jeudi 25 février 2021 11:52
À : 'Young Lee' <[email-masked]>; 'Luis M. Contreras' <[email-masked]>
Cc : 'Joel M. Halpern' <[email-masked]>; [email-masked]; 'Eric Gray' <[email-masked]>; 'John E Drake' <jdrake=[email-masked]>; 'Rokui, Reza (Nokia - CA/Ottawa)' <[email-masked]>; BOUCADAIR Mohamed TGI/OLN <[email-masked]>
Objet : Re: [Teas] network Slice Endpoint in draft-ietf-teas-ietf-network-slice-definition-00

[...]

But my opinion of all of this is coloured by thinking about enhanced VPNs (VPN+) [3] and IETF network slices as the same thing.

[...]

[1] https://mailarchive.ietf.org/arch/msg/teas/ibycGzi5cxJUJSvRxm9OsQdDqn8/
[2] RFC 4026
[3] draft-ietf-teas-enhanced-vpn

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