Re: [Bier] What is Slice Aggregate?
Toerless Eckert <tte@cs.fau.de> Tue, 09 November 2021 17:50 UTC
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Date: Tue, 09 Nov 2021 18:49:59 +0100
From: Toerless Eckert <tte@cs.fau.de>
To: Lizhenbin <lizhenbin@huawei.com>
Cc: "teas@ietf.org" <teas@ietf.org>, "apn@ietf.org" <apn@ietf.org>, "bier@ietf.org" <bier@ietf.org>
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Subject: Re: [Bier] What is Slice Aggregate?
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I think a slice aggregate is a pizza Sorry... to much serious IETF work, i just could not let that opportunity go, but i am sure you could upsell the idea especially to the BIER-WG if you came up with a way how the technology could be abbreviated PIZZA ;-) Please carry on. Toerless On Tue, Nov 09, 2021 at 01:34:47PM +0000, Lizhenbin wrote: > Hi authors of draft-ietf-teas-ietf-network-slices, > > The authors of the draft draft-zzhang-bier-slicing-and-differentiation-00 mentioned in the draft: > " > [I-D.bestbar-teas-ns-packet] introduces the notion of Slice Aggregate > which comprises of one of more IETF network slice traffic streams. A > Slice Aggregate is identified by a Slice Selector (SS), and packets > carry the SS so that associated forwarding treatment or S-PHB (Slice > policy Per Hop Behavior - the externally observable forwarding > behavior applied to a specific packet belonging to a slice aggregate) > - can be applied along the path. > " > " > The authors of this document believe that the IETF Network Slicing > framework, when augmented by the Slice Aggregate, addresses the APN > problem domain very well. > " > > According to the past discussion, we think the slice aggregate means the underlay slice, that is the new terminology "network resource partition". > If so, the Slice Selector should be the identifier of the network resource partition. But according to the draft-zzhang-bier-slicing-and-differentiation-00, > the slice aggregate can be augmented to address the APN problem. In the recently published draft draft-li-apn-header-00, the APN attribute is defined > including the APN ID (user group/application group) the packet belongs to , the Intent and APN parameters applied to the packet. It is apparent these > attributes are totally different from the identifier of the underlay slice. > > Can you clarify the following about the slice aggregate: > 1. What is slice aggregate? Is it the underlay network slice, the APN attribute-like parameters, both or other identifier? Or can it be all possible identifiers to identify a flow? > 2. What is the usage of the slice aggregate in the draft-ietf-teas-ietf-network-slices if it is not the network resource partition any more? Is it introduced a new identifier to identify a flow? > 3. What is the scope of the slice aggregate work in the TEAS WG if it is a new identifier other than the resource partition? Will you go on to define the encapsulation and the > protocol extensions for the new identifier or augment it to address the APN problem? > > > Best Regards, > Robin > > > > _______________________________________________ > BIER mailing list > BIER@ietf.org > https://www.ietf.org/mailman/listinfo/bier
- [Bier] What is Slice Aggregate? Lizhenbin
- Re: [Bier] What is Slice Aggregate? Toerless Eckert
- Re: [Bier] What is Slice Aggregate? Adrian Farrel
- Re: [Bier] What is Slice Aggregate? Lizhenbin