Re: [Teas] A draft on the framework for end-to-end IETF network slicing

"Joel M. Halpern" <jmh@joelhalpern.com> Fri, 14 May 2021 16:50 UTC

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To: Igor Bryskin <i_bryskin@yahoo.com>, "teas@ietf.org" <teas@ietf.org>
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From: "Joel M. Halpern" <jmh@joelhalpern.com>
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Subject: Re: [Teas] A draft on the framework for end-to-end IETF network slicing
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The answer seems to depend upon ones perspective.  While I have an 
opinion (maybe even several) about where our IETF network slice 
(service or interface) definitions will end up, I do not speak for the 
community.  Until we have arrived, I will treat these things as distinct.

On 5/14/2021 12:45 PM, Igor Bryskin wrote:
> Hi Joel,
> 
> Suppose a TE service/tunnel is requested and set up connecting access 
> points A and B across the network. Can I consider such a tunnel as a 
> trivial IETF network slice? If not, why? If yes. why not to reduce, 
> generally speaking, the  IETF network slice problem to the problem of 
> p2p and p2mp TE tunnels interconnecting IETF slice end points? For 
> example, we have spent a lot of time discussing e2e multi-domain TE 
> tunnels and how their segments in each domain are identified, 
> associated, etc. Is it necessary or useful in your opinion to repeat the 
> discussion in the context of slicing?
> 
> 
> Thanks,
> Igor
> 
> 
> On Friday, May 14, 2021, 12:05:44 AM EDT, Joel M. Halpern 
> <jmh@joelhalpern.com> wrote:
> 
> 
> Do you mean traffic monitoring at the domain edges?  Or inside the
> domain?  If at the domain edges, then any mapping technology can also be
> used for monitoring.
> If inside the domain, this places a significant disaggregated statistics
> collection load on the internals of the network.
> Edge-to-Edge monitoring by the consumer (client? customer?) of the
> component is clealry useful.  But does not requrie such identification.
>    Nor does it requrie internal disaggregated state reporting.
> the internals presumably will monitor the aggregated behavior.  Which
> again does not require the identification.
> 
> Yours,
> Joel
> 
> On 5/13/2021 11:54 PM, Dongjie (Jimmy) wrote:
>  > Hi Joel,
>  >
>  > Thanks for your comments.
>  >
>  > The requirement of carrying network slice related identifier in the 
> data packet was described in 
> draft-dong-teas-enhanced-vpn-vtn-scalability and other relevant 
> documents. Currently there are several proposals about the encapsulation 
> of network slice related identifiers. Based on that, this document 
> further describes the considerations about the multi-domain IETF network 
> slice scenario, and the interaction with other technical domains for 5G 
> end-to-end network slicing.
>  >
>  > You are right that the path selection, resource allocation and 
> traffic handling would be based on the identifiers internal to a network 
> domain. As described in this draft, the end-to-end network slice 
> identifier may be used for traffic monitoring at the end-to-end network 
> slice granularity.
>  >
>  > Best regards,
>  > Jie
>  >
>  >> -----Original Message-----
>  >> From: Joel M. Halpern [mailto:jmh@joelhalpern.com 
> <mailto:jmh@joelhalpern.com>]
>  >> Sent: Thursday, May 13, 2021 12:49 PM
>  >> To: Dongjie (Jimmy) <jie.dong@huawei.com 
> <mailto:jie.dong@huawei.com>>; teas@ietf.org <mailto:teas@ietf.org>
>  >> Subject: Re: [Teas] A draft on the framework for end-to-end IETF network
>  >> slicing
>  >>
>  >> It is not at all clear that any identifiers are needed inside the 
> various networks,
>  >> and specifically it is not clear that an internal identifier for the 
> end-to-end
>  >> network slice is needed at the level of the IETF network slice as is 
> being defined
>  >> by teas.  Since path selection, QoS parameter handling, and resource
>  >> allocation needs to be handled in aggregate, it seems likely that no 
> such
>  >> identifier is needed.
>  >>
>  >> Yours,
>  >> Joel
>  >>
>  >> On 5/12/2021 10:53 PM, Dongjie (Jimmy) wrote:
>  >>> Hi WG,
>  >>>
>  >>> Recently we published a draft on the framework for end-to-end IETF
>  >>> network slicing:
>  >>> 
> https://datatracker.ietf.org/doc/html/draft-li-teas-e2e-ietf-network-s 
> <https://datatracker.ietf.org/doc/html/draft-li-teas-e2e-ietf-network-s>
>  >>> licing
>  >>> 
> <https://datatracker.ietf.org/doc/html/draft-li-teas-e2e-ietf-network- 
> <https://datatracker.ietf.org/doc/html/draft-li-teas-e2e-ietf-network->
>  >>> slicing>
>  >>>
>  >>> This document describes the scenarios of end-to-end network slicing,
>  >>> and the framework of network slice mapping between different network
>  >>> segments and network domains. Multiple network slice related
>  >>> identifiers are defined to covers different network scopes.
>  >>>
>  >>> The network slice related identifiers of different network scopes can
>  >>> be instantiated with MPLS or IPv6 data plane, which are further
>  >>> described in the following drafts:
>  >>>
>  >>> 
> https://datatracker.ietf.org/doc/draft-li-mpls-e2e-ietf-network-slicin 
> <https://datatracker.ietf.org/doc/draft-li-mpls-e2e-ietf-network-slicin>
>  >>> g/
>  >>> 
> <https://datatracker.ietf.org/doc/draft-li-mpls-e2e-ietf-network-slici 
> <https://datatracker.ietf.org/doc/draft-li-mpls-e2e-ietf-network-slici>
>  >>> ng/>
>  >>>
>  >>> 
> https://datatracker.ietf.org/doc/html/draft-li-6man-e2e-ietf-network-s 
> <https://datatracker.ietf.org/doc/html/draft-li-6man-e2e-ietf-network-s>
>  >>> licing
>  >>> 
> <https://datatracker.ietf.org/doc/html/draft-li-6man-e2e-ietf-network- 
> <https://datatracker.ietf.org/doc/html/draft-li-6man-e2e-ietf-network->
>  >>> slicing>
>  >>>
>  >>> 
> https://datatracker.ietf.org/doc/html/draft-li-spring-sr-e2e-ietf-netw 
> <https://datatracker.ietf.org/doc/html/draft-li-spring-sr-e2e-ietf-netw>
>  >>> ork-slicing
>  >>> 
> <https://datatracker.ietf.org/doc/html/draft-li-spring-sr-e2e-ietf-net 
> <https://datatracker.ietf.org/doc/html/draft-li-spring-sr-e2e-ietf-net>
>  >>> work-slicing>
>  >>>
>  >>> Your review and comments are welcome. (Comments on the specific data
>  >>> plane draft can go to the corresponding WG mail list).
>  >>>
>  >>> Best regards,
>  >>>
>  >>> Jie
>  >>>
>  >>>
>  >>> _______________________________________________
>  >>> Teas mailing list
>  >>> Teas@ietf.org <mailto:Teas@ietf.org>
>  >>> https://www.ietf.org/mailman/listinfo/teas 
> <https://www.ietf.org/mailman/listinfo/teas>
>  >>>
> 
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