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Subject: [Netslices] Fwd: [5gangip] 5G IP PS DRAFT for July BoF
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FYI

-------- Forwarded Message --------
Subject: 	[5gangip] 5G IP PS DRAFT for July BoF
Date: 	Tue, 2 May 2017 14:34:14 +0000
From: 	Dirk.von-Hugo@telekom.de
To: 	5gangip@ietf.org



Dear all

A handful of co-authors have prepared a Problem Statement (PS) type of 
draft for our planned BoF on “Internet Protocols for 5G” (5GIP) 
explaining the need for technology agnostic interfacing of 5G access and 
core control plane via new IP Access Mobility and Session Management 
Protocols. There we argue that the draft approaches in ILA and MAMS on 
which we have already been working in 5gangip may serve as solution 
space upon which to develop such protocols for the upcoming 5G system 
(choosing 3GPP Rel. 15 architecture and concept as exemplary reference).

BoF deadline for July meeting is 2017-06-02 (Friday) - i.e. month from 
now, therefore we plan to publish the 00 version today.

For the draft charter proposal we currently see following issues/needs:

- addressing next generation system architecture of modular 
technology-agnostic network functionalities to flexibly build logical 
network slices enabling efficient provision of end-to-end services via 
heterogeneous technologies

- drafting protocols allowing for true integration and convergence of 
multiple heterogeneous access technologies (including their concurrent 
use as e.g. in multi-path) and current technology specific control plane 
entities

- serving and complementing worldwide research and standardisation 
activity of such 5G networks is under way e.g. at 3GPP, BBF, IEEE, ITU-T …

- specifying set of protocols to enable (basic) connectivity (including 
optional mobility support) and session set up which are as much as 
possible abstracted from technology specifics.

- improving efficiency by reducing overhead in terms of current 
InterWorking GateWays (IWGWs), OVerHead (OVH) due to Tunneling and 
multiple encapsulation, complex mapping mechanisms

  We will come back soon with the question for support in terms of 
review, commitment to work on BoF preparation and attending / supporting 
in Prague (and potentially invite/propose further people).

Thanks a lot!

Best Regards
Behcet and Dirk


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    FYI<br>
    <br>
    -------- Forwarded Message --------
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        <tr>
          <th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject: </th>
          <td>[5gangip] 5G IP PS DRAFT for July BoF</td>
        </tr>
        <tr>
          <th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
          <td>Tue, 2 May 2017 14:34:14 +0000</td>
        </tr>
        <tr>
          <th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
          <td><a class="moz-txt-link-abbreviated" href="mailto:Dirk.von-Hugo@telekom.de">Dirk.von-Hugo@telekom.de</a></td>
        </tr>
        <tr>
          <th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
          <td><a class="moz-txt-link-abbreviated" href="mailto:5gangip@ietf.org">5gangip@ietf.org</a></td>
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style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Dear
            </span><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">all</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">A
              handful of co-authors have prepared a Problem Statement
              (PS) type of draft for our planned BoF on “Internet
              Protocols for 5G” (5GIP) explaining the need for
              technology agnostic interfacing of 5G access and core
              control plane via new IP Access Mobility and Session
              Management Protocols. There we argue that the draft
              approaches in ILA and MAMS on which we have already been
              working in 5gangip may serve as solution space upon which
              to develop such protocols for the upcoming 5G system
              (choosing 3GPP Rel. 15 architecture and concept as
              exemplary reference).</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">BoF
              deadline for July meeting is 2017-06-02 (Friday) - i.e. 
              month from now, therefore we plan to publish the 00
              version today.</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">For
              the draft charter proposal we currently see following
              issues/needs:
            </span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">-
              addressing next generation system architecture of modular
              technology-agnostic network functionalities to flexibly
              build logical network slices enabling efficient provision
              of end-to-end services via heterogeneous technologies</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">-
              drafting protocols allowing for true integration and
              convergence of multiple heterogeneous access technologies
              (including their concurrent use as e.g. in multi-path) and
              current technology specific control plane entities</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">-
              serving and complementing worldwide research and
              standardisation activity of such 5G networks is under way
              e.g. at 3GPP, BBF, IEEE, ITU-T …</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">-
              specifying set of protocols to enable (basic) connectivity
              (including optional mobility support) and session set up
              which are as much as possible abstracted from technology
              specifics.</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">-
              improving efficiency by reducing overhead in terms of
              current InterWorking GateWays (IWGWs), OVerHead (OVH) due
              to Tunneling and multiple encapsulation, complex mapping
              mechanisms</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D"> We
              will come back soon with the question for support in terms
              of review, commitment to work on BoF preparation and
              attending / supporting in Prague (and potentially
              invite/propose further people).</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,&quot;sans-serif&quot;;color:#1F497D">Thanks
              a lot!</span><o:p></o:p></p>
          <p class="MsoNormal"
            style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span
style="font-size:10.0pt;font-family:&quot;Arial&quot;,&quot;sans-serif&quot;;color:#1F497D">Best
              Regards<br>
              Behcet and Dirk  </span><o:p></o:p></p>
          <p class="MsoNormal"><o:p> </o:p></p>
        </div>
      </div>
    </div>
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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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Dear NetSlicing folks

Re: Preparation for a Network Slicing BoF at IETF 99 in Prague

Following our last successful workshop at IETF 98 (i.e. Monday 27th =
March 2017 - see enclosed short notes and minutes) a 20 strong group is =
progressing with development of 5 drafts which are both synchronised and =
crossed checked planed for release in early June 2017 in support for the =
planed Network Slicing BoF at IETF 99 in Prague:

Network Slicing Drafts:

Draft No1 -  Use cases & Requirements  (updates)

Draft No2 -  Gap-Analysis

Draft No3 -  Architecture/Framework + Definitions (updates)

Draft No4 -  Problem Statement (updates)

Draft No5 -  NS Charter (updates)

Please note that all the above drafts will utilise and are based on an =
extended NS definition - only physical /logical partition of =
connectivity resources in a network - connectivity resource slicing  - =
is initially considered out of scope of these documents as inappropriate =
and insufficient for further work on Network Slicing.

All versions of the above drafts are currently on the NetSlices Github =
repository https://github.com/netslices/IETF-NetSlices

=20

=20

Would you be so kind as to express your further interest in =
participating as contributors/reviewers to the above drafts by sending =
an interest message to my self (a.galis@ucl.ac.uk =
<mailto:a.galis@ucl.ac.uk>). I will include your email in this =
workgroup.

In addition please post your GITHUB account to Kiran Makhijani =
<Kiran.Makhijani@huawei.com> for full write / read access to the =
NetSlices Github.



We are preparing a Network Slicing BoF at IETF99 and your support and =
contributions would be both valued and appreciated.

Thank you in advance

Best Regards

Alex



> On 29 Mar 2017, at 00:51, Alex Galis <a.galis@ucl.ac.uk> wrote:
>=20
> Dear NetSlicing folks,
>=20
> =20
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> Re: NS side meeting =E2=80=93 IETF98 Monday 27th March 2017 =
18:15-21:15
>=20
> =20
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> It was a great pleasure to meet some of you at the NS side meeting of =
Monday 27th March 2017 in Chicago.
> =20
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> My short notes as minutes of this meeting as follows:
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> 1.     Scope of the meeting: Scope of the NS meeting: Present and =
discuss use cases, architecture and identify technical problems to be =
address by future work at IETF
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> 2.     An audience of approx 125 with a very full agenda
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> I. Context & Revisited NS Problem Statement
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> #01: =E2=80=9CIntroductory Document and Revised Problem Statement walk =
through=E2=80=9D =E2=80=93 presenter: Alex Galis - UCL - Huawei
> =20
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> II. Towards NS Use Cases
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> #02: =E2=80=9C5G Network Slicing - 3GPP Use Case background=E2=80=9D - =
presenter: Xavier DeFoy -InterDigital
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> #03: =E2=80=9CGeneralized Market/Service Verticals with Network =
Slicing Use cases=E2=80=9D- presenter: K. Makhijani- Huawei
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> #04: =E2=80=9CAn ICN service delivery prototype using slices=E2=80=9D =
- presenter: Ravi Ravindran - Huawei
> =20
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> III. Towards Operators Ecosystem Viewpoints
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> #05: =E2=80=9CNetwork Slicing architecture=E2=80=9D- presenter: Liang =
Geng =E2=80=93 China Mobile
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> #06: =E2=80=9CNetwork Slicing: Technical Viewpoints and Functional =
Roles=E2=80=9D- presenter: Pedro Martinez-Julia =E2=80=93 NICT Japan
> =20
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> III. Towards Manufactures Viewpoints
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> #07: =E2=80=9CHow to slice Network Slicing for the IETF=E2=80=9D - =
presenter: H. Flinck - Nokia
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> #08: =E2=80=9CACTN Virtual Network operation (with Network Slicing =
Insights)=E2=80=9D - presenter: G. Grammel - Juniper
>=20
> #09: =E2=80=9CAutomatic Network Slicing Management for Transport =
Network=E2=80=9D- presenter: Qiang Li - Huawei
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> #10: =E2=80=9CForwarding Path & Signaling Management=E2=80=9D- =
presenter: S. Matsushima- SoftBank
> =20
>=20
> IV. Final Q&A & Conclusions: 30 mins
>=20
> All slides from the NS meeting are at: =
https://github.com/netslices/IETF- =
<https://github.com/netslices/IETF->NetSlices/tree/master/IETF98_Sidemeeti=
ng023.
>=20
>=20
> 3.     The presenters have identified a significant number of problem =
areas to be addressed at IETF in particular:
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> 19 problem areas identified in #01
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> 7 problem areas identified in #02
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> 4 problem areas identified in #03
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> 4 problem areas identified in #04
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> 9 problem areas identified in #05
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> 8 problem areas identified in #06
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> 7 problem areas identified in #07
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> 7 problem areas identified in #09
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> 10 problem areas identified in #10
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> =20
> 4.     Descriptive and/or prescriptive definitions for Network Slices =
were provided in #01, #05, #06, #07, #08
> =20
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> 5.     Based on the audience response the following actions are =
recommended:
> =20
>=20
> =E2=80=A2 Action1: a WG forming BoF will be requested at the next =
IETF99 ( unanimous request)
> =20
> =E2=80=A2 Action2: approx 40 member of the audience showed their =
interest to contribute in the next 3 months to
>=20
> =E2=80=93      use cases,
>=20
> =E2=80=93      problem statements,
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> =E2=80=93      requirements and architecture
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> =E2=80=93      Exposure Interface specification and data model
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> =E2=80=93      Efficient slice isolation with guarantees for isolation
> =20
> =E2=80=A2 Action 3: Unanimous request to review and consolidate a =
descriptive and prescriptive definition of NS
>=20
> =E2=80=A2 Action 4: A draft charter as problem statement for WG =
activities that would include:
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>  - the description of the standardisation methods / algorithms within =
the scope of IETF and the related documents ( NS definition, reference =
models, use cases, etc.)
>=20
>  - a concrete work plan for 2 years
>=20
> This charter be edited with contributions from the NS members of the =
mailing list and made available at =
https://github.com/netslices/IETF-NetSlices =
<https://github.com/netslices/IETF-NetSlices>
>=20
>=20
> Thank you for all presenters and participants to the meeting which =
generated significant discussion and interest.
> =20
> Please add any further notes and/or further minutes for this NS side =
meeting
>=20
>=20
> Best Regards
>=20
> Alex
>=20
> =20
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> =20
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> =20
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> =20
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> =20
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> =20
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> =20
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<!--StartFragment--><p class=3D"MsoNormal">Dear NetSlicing folks</p><p =
class=3D"MsoNormal">Re: Preparation for a Network
Slicing BoF at IETF 99 in Prague</p><p class=3D"MsoNormal">Following our =
last successful workshop at IETF 98 (i.e. Monday 27th March 2017 - see =
enclosed short notes and
minutes) a 20 strong group is progressing with development of 5 drafts =
which
are both synchronised and crossed checked planed for release in early =
June 2017 in support for the planed&nbsp;<o:p class=3D""></o:p>Network =
Slicing BoF at IETF 99 in Prague:</p><p class=3D"MsoNormal">Network =
Slicing
Drafts:<o:p class=3D""></o:p></p><p class=3D"MsoNormal">Draft No1 =
-&nbsp; Use cases &amp; Requirements&nbsp; (updates)<o:p =
class=3D""></o:p></p><p class=3D"MsoNormal">Draft No2 -&nbsp; =
Gap-Analysis<o:p class=3D""></o:p></p><p class=3D"MsoNormal">Draft No3 =
-&nbsp; Architecture/Framework + Definitions (updates)<o:p =
class=3D""></o:p></p><p class=3D"MsoNormal">Draft No4 -&nbsp; Problem =
Statement (updates)<o:p class=3D""></o:p></p><p class=3D"MsoNormal">Draft =
No5 -&nbsp; NS Charter (updates)<o:p class=3D""></o:p></p><p =
class=3D"MsoNormal">Please note that all
the above drafts will utilise and are based on an extended NS definition =
- only
physical /logical partition of connectivity resources in a network - =
connectivity
resource slicing&nbsp; - is initially
considered out of scope of these documents as inappropriate and =
insufficient
for further work on Network Slicing.<o:p class=3D""></o:p></p><p =
class=3D"MsoNormal">All versions of the
above drafts are currently on the NetSlices Github repository <a =
href=3D"https://github.com/netslices/IETF-NetSlices" =
class=3D"">https://github.com/netslices/IETF-NetSlices</a><o:p =
class=3D""></o:p></p><p class=3D"MsoNormal"><o:p =
class=3D"">&nbsp;</o:p></p><p class=3D"MsoNormal"><o:p =
class=3D"">&nbsp;</o:p></p><p class=3D"MsoNormal">Would you be so kind
as to express your further interest in participating as =
contributors/reviewers
to the above drafts by sending an interest message to my self (<a =
href=3D"mailto:a.galis@ucl.ac.uk" class=3D"">a.galis@ucl.ac.uk</a>). I =
will include your email in this workgroup.<o:p class=3D""></o:p></p><p =
class=3D"MsoNormal">In addition please
post your GITHUB account to Kiran Makhijani &lt;<a =
href=3D"mailto:Kiran.Makhijani@huawei.com" =
class=3D"">Kiran.Makhijani@huawei.com</a>&gt;
for full write / read access to the NetSlices Github.<o:p =
class=3D""></o:p></p><p class=3D"MsoNormal"><br class=3D""></p><p =
class=3D"MsoNormal">We are preparing a
Network Slicing BoF at IETF99 and your support and contributions would =
be both
valued and appreciated.<o:p class=3D""></o:p></p><p =
class=3D"MsoNormal">Thank you in advance<o:p class=3D""></o:p></p><p =
class=3D"MsoNormal">Best Regards<o:p class=3D""></o:p></p><p =
class=3D"MsoNormal">Alex<o:p class=3D""></o:p></p>

<!--EndFragment--><div class=3D""><br class=3D""></div><div class=3D""><br=
 class=3D""><div><blockquote type=3D"cite" class=3D""><div class=3D"">On =
29 Mar 2017, at 00:51, Alex Galis &lt;<a href=3D"mailto:a.galis@ucl.ac.uk"=
 class=3D"">a.galis@ucl.ac.uk</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D"">
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8" =
class=3D""><div style=3D"word-wrap: break-word; -webkit-nbsp-mode: =
space; -webkit-line-break: after-white-space;" class=3D""><span =
class=3D"">Dear NetSlicing folks,<br class=3D""><br class=3D"">&nbsp;<br =
class=3D""><br class=3D"">Re: NS side meeting =E2=80=93 IETF98 Monday =
27th&nbsp;March 2017 18:15-21:15<br class=3D""><br class=3D"">&nbsp;<br =
class=3D""><br class=3D"">It was a great pleasure to meet some of =
you&nbsp;at the NS side meeting of Monday 27th&nbsp;March 2017 in =
Chicago.<br class=3D"">&nbsp;<br class=3D""><br class=3D"">My short =
notes as minutes of this meeting&nbsp;as follows:</span><div =
class=3D""><span class=3D""><br class=3D"">1.&nbsp; =
&nbsp;&nbsp;&nbsp;Scope of the meeting: Scope of&nbsp;the NS meeting: =
Present and discuss use cases, architecture and identify&nbsp;technical =
problems to be address by&nbsp;future work at IETF<br class=3D""><br =
class=3D"">2.&nbsp; &nbsp;&nbsp;&nbsp;An audience of approx 125 =
with&nbsp;a very full agenda<br class=3D""><br class=3D"">I. Context =
&amp; Revisited NS Problem Statement<br class=3D""><br class=3D"">#01: =
=E2=80=9CIntroductory Document and Revised Problem Statement =
walk&nbsp;through=E2=80=9D =E2=80=93 presenter: Alex Galis - UCL - =
Huawei<br class=3D"">&nbsp;<br class=3D""><br class=3D"">II. Towards NS =
Use Cases<br class=3D""><br class=3D"">#02: =E2=80=9C5G Network Slicing =
- 3GPP Use Case background=E2=80=9D - presenter: Xavier&nbsp;DeFoy =
-InterDigital<br class=3D""><br class=3D"">#03: =E2=80=9CGeneralized =
Market/Service Verticals with Network Slicing Use&nbsp;cases=E2=80=9D- =
presenter: K. Makhijani- Huawei<br class=3D""><br class=3D"">#04: =E2=80=9C=
An ICN service delivery prototype using slices=E2=80=9D - presenter: =
Ravi&nbsp;Ravindran - Huawei<br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">III. Towards Operators Ecosystem Viewpoints<br class=3D""><br =
class=3D"">#05: =E2=80=9CNetwork Slicing architecture=E2=80=9D- =
presenter: Liang Geng =E2=80=93 China&nbsp;Mobile<br class=3D""><br =
class=3D"">#06: =E2=80=9CNetwork Slicing: Technical Viewpoints and =
Functional Roles=E2=80=9D- presenter:&nbsp;Pedro Martinez-Julia =E2=80=93 =
NICT Japan<br class=3D"">&nbsp;<br class=3D""><br class=3D"">III. =
Towards Manufactures Viewpoints<br class=3D""><br class=3D"">#07: =E2=80=9C=
How to slice Network Slicing for the IETF=E2=80=9D - presenter: =
H.&nbsp;Flinck - Nokia<br class=3D""><br class=3D"">#08: =E2=80=9CACTN =
Virtual Network operation (with Network Slicing&nbsp;Insights)=E2=80=9D =
- presenter: G. Grammel - Juniper<br class=3D""><br class=3D"">#09: =
=E2=80=9CAutomatic Network Slicing Management for Transport Network=E2=80=9D=
- presenter:&nbsp;Qiang Li - Huawei<br class=3D""><br class=3D"">#10: =
=E2=80=9CForwarding Path &amp; Signaling Management=E2=80=9D- presenter: =
S.&nbsp;Matsushima- SoftBank<br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">IV. Final Q&amp;A &amp; Conclusions: 30 mins<br class=3D""><br =
class=3D"">All slides from the NS meeting are at: <a =
href=3D"https://github.com/netslices/IETF-" =
class=3D"">https://github.com/netslices/IETF-</a>NetSlices/tree/master/IET=
F98_Sidemeeting023.<br class=3D""><br class=3D""><br =
class=3D""></span></div><div class=3D""><span class=3D"">3.&nbsp; =
&nbsp;&nbsp;&nbsp;The presenters have identified&nbsp;a significant =
number of problem areas to be addressed at IETF&nbsp;in particular:<br =
class=3D""><br class=3D"">19 problem areas identified in&nbsp;#01<br =
class=3D""><br class=3D"">7 problem areas identified in&nbsp;#02<br =
class=3D""><br class=3D"">4 problem areas identified in&nbsp;#03<br =
class=3D""><br class=3D"">4 problem areas identified in&nbsp;#04<br =
class=3D""><br class=3D"">9 problem areas identified in&nbsp;#05<br =
class=3D""><br class=3D"">8 problem areas identified in&nbsp;#06<br =
class=3D""><br class=3D"">7 problem areas identified in&nbsp;#07<br =
class=3D""><br class=3D"">7 problem areas identified in&nbsp;#09<br =
class=3D""><br class=3D"">10 problem areas identified in&nbsp;#10<br =
class=3D""><br class=3D"">&nbsp;<br class=3D"">4.&nbsp; =
&nbsp;&nbsp;&nbsp;Descriptive and/or prescriptive&nbsp;definitions for =
Network Slices were provided =
in&nbsp;#01,&nbsp;#05,&nbsp;#06,&nbsp;#07,&nbsp;#08<br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">5.&nbsp; =
&nbsp;&nbsp;&nbsp;Based on the audience response&nbsp;the following =
actions are recommended:<br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">=E2=80=A2 Action1: a WG forming BoF will be&nbsp;requested at =
the next IETF99 ( unanimous request)<br class=3D"">&nbsp;<br =
class=3D"">=E2=80=A2 Action2: approx 40 member of the =
audience&nbsp;showed their interest to contribute in the next 3 months =
to<br class=3D""><br class=3D"">=E2=80=93&nbsp; &nbsp; &nbsp;&nbsp;use =
cases,<br class=3D""><br class=3D"">=E2=80=93&nbsp; &nbsp; =
&nbsp;&nbsp;problem statements,<br class=3D""><br class=3D"">=E2=80=93&nbs=
p; &nbsp; &nbsp;&nbsp;requirements and architecture<br class=3D""><br =
class=3D"">=E2=80=93&nbsp; &nbsp; &nbsp;&nbsp;Exposure =
Interface&nbsp;specification and data model<br class=3D""><br =
class=3D"">=E2=80=93&nbsp; &nbsp; &nbsp;&nbsp;Efficient slice isolation =
with&nbsp;guarantees for isolation<br class=3D"">&nbsp;<br class=3D"">=E2=80=
=A2 Action 3: Unanimous request to review and&nbsp;consolidate a =
descriptive and prescriptive definition of NS</span></div><div =
class=3D""><span class=3D""><br class=3D"">=E2=80=A2 Action 4: A draft =
charter as problem&nbsp;statement for WG activities that would =
include:<br class=3D""><br class=3D"">&nbsp;- the&nbsp;description of =
the standardisation methods / algorithms within the scope of&nbsp;IETF =
and the related documents ( NS definition, reference models,&nbsp;use =
cases, etc.)<br class=3D""><br class=3D"">&nbsp;- a concrete&nbsp;work =
plan for 2 years<br class=3D""><br class=3D"">This charter be edited =
with contributions&nbsp;from the NS members of the mailing list and made =
available at&nbsp;<a href=3D"https://github.com/netslices/IETF-NetSlices" =
class=3D"">https://github.com/netslices/IETF-NetSlices</a><br =
class=3D""><br class=3D""><br class=3D"">Thank you for all presenters =
and&nbsp;participants to the meeting which generated significant =
discussion and&nbsp;interest.<br class=3D"">&nbsp;<br class=3D"">Please =
add any further notes and/or further minutes for this&nbsp;NS =
side&nbsp;meeting<br class=3D""><br class=3D""><br class=3D"">Best =
Regards<br class=3D""><br class=3D"">Alex<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;</span></div></div></div></blockquote></div><br =
class=3D""></div></body></html>=

--Apple-Mail=_00D02A12-DC0B-4CDE-8800-9B6A520DEBCD--


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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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From nobody Tue May  9 16:01:36 2017
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Date: Wed, 10 May 2017 08:01:29 +0900
From: Pedro Martinez-Julia <pedro@nict.go.jp>
To: philip.eardley@bt.com
Cc: nurit.sprecher@nokia.com, galis.alex@gmail.com, NetSlices@ietf.org, a.galis@ucl.ac.uk
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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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On Tue, May 09, 2017 at 10:41:46AM +0000, philip.eardley@bt.com wrote:
> Could you explain the difference between a network slice and network
> service please?

Network Service: The means to supply/deliver a set of functions linked
to the network (e.g. connectivity or distributed data storage).

Network Slice: A portion of a network that is provided to a user for it
to manage as needed, remarking that a slice ("the network portion") is
composed of several portions of physical or virtual underlying resources
that are administratively put together under the control of such user.

The differences are clear, the relation is that the flexibility offered
by network slices makes them ideal for instantiating network services,
but they are not the same thing, by no means.

> Is there a draft charter yet? – happy to review it, but I could only
> find some slides on github

We are still working on it...

> Thanks
> phil

Regards,
Pedro

-- 
Pedro Martinez-Julia
Network Science and Convergence Device Technology Laboratory
Network System Research Institute
National Institute of Information and Communications Technology (NICT)
4-2-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan
Email: pedro@nict.go.jp
---------------------------------------------------------
*** Entia non sunt multiplicanda praeter necessitatem ***


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From: "Sprecher, Nurit (Nokia - IL/Kfar Sava)" <nurit.sprecher@nokia.com>
To: "philip.eardley@bt.com" <philip.eardley@bt.com>, "galis.alex@gmail.com" <galis.alex@gmail.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>
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Thread-Topic: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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From: "Kiran.Makhijani" <Kiran.Makhijani@huawei.com>
To: "Sprecher, Nurit (Nokia - IL/Kfar Sava)" <nurit.sprecher@nokia.com>, "philip.eardley@bt.com" <philip.eardley@bt.com>, "galis.alex@gmail.com" <galis.alex@gmail.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>
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Thread-Topic: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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From nobody Thu May 11 15:31:33 2017
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Date: Fri, 12 May 2017 07:26:35 +0900
From: Pedro Martinez-Julia <pedro@nict.go.jp>
To: philip.eardley@bt.com
Cc: nurit.sprecher@nokia.com, galis.alex@gmail.com, NetSlices@ietf.org, a.galis@ucl.ac.uk
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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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Dear Philip,

My concept of "network resource" is clearly wider than I have achieved
to communicate. When I talk about a "resource" I am actually meaning an
"abstract object", which can be anything (e.g. physical/virtual device,
physical/virtual/software service, real/represented persons, and also
actual things, from IoT). Therefore, a "network resource" is any object
related to the network (connected and/or with networking abilities).

I hope this clarifies my definition of this matter.

Regards,
Pedro

-- 
Pedro Martinez-Julia
Network Science and Convergence Device Technology Laboratory
Network System Research Institute
National Institute of Information and Communications Technology (NICT)
4-2-1, Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan
Email: pedro@nict.go.jp
---------------------------------------------------------
*** Entia non sunt multiplicanda praeter necessitatem ***


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From: Leeyoung <leeyoung@huawei.com>
To: "Dongjie (Jimmy)" <jie.dong@huawei.com>, "Kiran.Makhijani" <Kiran.Makhijani@huawei.com>, "Sprecher, Nurit (Nokia - IL/Kfar Sava)" <nurit.sprecher@nokia.com>, "philip.eardley@bt.com" <philip.eardley@bt.com>, "galis.alex@gmail.com" <galis.alex@gmail.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>
CC: "Sartori, Cinzia (Nokia - DE/Munich)" <cinzia.sartori@nokia-bell-labs.com>, "Andrianov, Anatoly (Nokia - US/Arlington Heights)" <anatoly.andrianov@nokia.com>, "a.galis@ucl.ac.uk" <a.galis@ucl.ac.uk>
Thread-Topic: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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Date: Fri, 12 May 2017 04:40:04 +0000
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From: "Sprecher, Nurit (Nokia - IL/Kfar Sava)" <nurit.sprecher@nokia.com>
To: Kiran.Makhijani <Kiran.Makhijani@huawei.com>, "philip.eardley@bt.com" <philip.eardley@bt.com>, "galis.alex@gmail.com" <galis.alex@gmail.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>
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Thread-Topic: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Fri, 12 May 2017 11:44:38 +0100
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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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On 12/05/2017 10:53, Sprecher, Nurit (Nokia - IL/Kfar Sava) wrote:
>
> 3.Basing on strict resource isolation for many services, I am unsure 
> about sharing of sub-network instances as mentioned below.
>
>  4. Nurit: The high level isolation requirement was security specific
>      to address security concerns in special cases, not from the
>     resource management perspective.
>

Nurit

Don't you need isolation to also ensure the dynamics of the system, i.e. 
to be sure to meet the loss, latency and b/w requirements or are 
operators backing away from that?

Stewart

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<html>
  <head>
    <meta content="text/html; charset=windows-1252"
      http-equiv="Content-Type">
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  <body bgcolor="#FFFFFF" text="#000000">
    <p><br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 12/05/2017 10:53, Sprecher, Nurit
      (Nokia - IL/Kfar Sava) wrote:<br>
    </div>
    <blockquote
cite="mid:AM4PR0701MB2081863D2A9F47911395368585E20@AM4PR0701MB2081.eurprd07.prod.outlook.com"
      type="cite">
      <p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0
        level1 lfo2"><span
          style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"
          lang="EN-GB"><span style="mso-list:Ignore">3.<span
              style="font:7.0pt &quot;Times New Roman&quot;">
            </span></span></span><!--[endif]--><span dir="LTR"></span><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"
          lang="EN-GB">Basing on strict resource isolation for many
          services, I am unsure about sharing of sub-network instances
          as mentioned below.
          <o:p></o:p></span></p>
      <ol style="margin-top:0in" start="4" type="1">
        <li class="MsoNormal" style="mso-list:l0 level1 lfo2"><span
style="font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif;color:red"
            lang="EN-GB">Nurit: The high level isolation requirement was
            security specific  to address security concerns in special
            cases, not from the resource management perspective.</span></li>
      </ol>
    </blockquote>
    <br>
    Nurit<br>
    <br>
    Don't you need isolation to also ensure the dynamics of the system,
    i.e. to be sure to meet the loss, latency and b/w requirements or
    are operators backing away from that?<br>
    <br>
    Stewart<br>
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Cc: Alex Galis <a.galis@ucl.ac.uk>, "Kiran.Makhijani" <Kiran.Makhijani@huawei.com>, "philip.eardley@bt.com" <philip.eardley@bt.com>, "Sartori, Cinzia (Nokia - DE/Munich)" <cinzia.sartori@nokia-bell-labs.com>, "Andrianov, Anatoly (Nokia - US/Arlington Heights)" <anatoly.andrianov@nokia.com>,  "Sprecher, Nurit (Nokia - IL/Kfar Sava)" <nurit.sprecher@nokia.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netslices/FixcL-UfGGu10cC2wHrAVaR17j0>
Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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Hi Nurit and All


Please note the unified terms used in the last period in the IETF =
Network Slicing presentations at the IETF97 & IETF98 and drafts=E2=80=99 =
work (i.e. gihhub repository: =
https://github.com/alexgalis/IETF-NetSlices =
<https://github.com/alexgalis/IETF-NetSlices>)

Best Regards
Alex


Resource Slice - A grouping of physical or virtual (network, compute, =
storage) resources which. It inherits the characteristics of the =
resources which are also bound to the capability of the resource. A =
resource slice could be one of the component of Network Slice, however =
on its own does not represent fully a Network Slice.

=20
Network slice - A Network slice is a managed group of subsets of =
resources, network functions / network virtual functions at the data, =
control, management/orchestration planes and services at a given time.  =
Network slice is programmable and has the ability to expose its =
capabilities. The behaviour of the network slice realized via network =
slice instance(s).

(1) The Service Instance component

=E2=80=A2     Represents the end-user service or business services.

=E2=80=A2     An instance of an end-user service or a business service =
that is realized within or by a NS.=20

=E2=80=A2     Would be provided by the network operator or by 3rd =
parties.

 (2) A Network Slice Instance component

=E2=80=A2     Represented by a set of network functions, virtual network =
functions and resources at a given time

=E2=80=A2     Forms a complete instantiated logical network to meet =
certain network characteristics required by the Service Instance(s).=20

=E2=80=A2     Provides network characteristics which are required by a =
Service Instance.

=E2=80=A2     May also be shared across multiple Service Instances

 (3) Resources component =E2=80=93 it includes: Physical, Logical & =
Virtual resources

=E2=80=A2     Physical & Logical resources - An independently manageable =
partition of a physical resource, which inherits the same =
characteristics as the physical resource and whose capability is bound =
to the capability of the physical resource.  It is dedicated to a =
Network Function or shared between a set of Network Functions.

=E2=80=A2     Virtual resources - An abstraction of a physical or =
logical resource, which may have different characteristics from that =
resource, and whose capability may not be bound to the capability of =
that resource.

 (4) Slice Element Manager (SEM) and Capability exposure component

=E2=80=A2     Slice Element Manager (SEM) is instantiated in each =
Network Slice and it manages all access permissions and all interaction =
between a Network Slice and external functions (i.e. other Network =
Slices, Orchestrators, etc). Each SEM converts requirements from =
orchestrator into virtual resources and manages virtual resources of a =
slice. SEM also exchanges information of virtual resources with other =
slice element managers via a dedicated resource interface.

=E2=80=A2     Allow 3rd parties to access via APIs information regarding =
services provided by the slice (e.g. connectivity information, QoS, =
mobility, autonomicity, etc.)

=E2=80=A2     Allow dynamical customization of the network =
characteristics for different diverse use cases within the limits set of =
functions by the operator.  Network slice enables the operator to create =
networks customized to provide flexible solutions for different market =
scenarios, which have diverse requirements, with respect to the =
functionality, performance and resource separation.

=E2=80=A2     It includes a description of the structure (and contained =
components) and configuration of the slice instance.

=20
Network slice template - A complete description of the structure, =
configuration and the plans/work flows for how to instantiate and =
control the Network Slice Instance during its life cycle.

=20
Network Slice Instance - An activated network slice. It is created based =
on network template. A set of managed run-time network functions, and =
resources to run these network functions, forming a complete =
instantiated logical network to meet certain network characteristics =
required by the service instance(s). It provides the network =
characteristics that are required by a service instance. A network slice =
instance may also be shared across multiple service instances provided =
by the network operator. The network slice instance may be composed by =
none, one or more sub-network instances, which may be shared by another =
network slice instance.

> On 12 May 2017, at 10:53, Sprecher, Nurit (Nokia - IL/Kfar Sava) =
<nurit.sprecher@nokia.com <mailto:nurit.sprecher@nokia.com>> wrote:
>=20
> Hello,
> Please see inline.
> Best regards,
> Nurit
> =20
> From: Kiran.Makhijani [mailto:Kiran.Makhijani@huawei.com =
<mailto:Kiran.Makhijani@huawei.com>]=20
> Sent: Thursday, May 11, 2017 10:45 PM
> To: Sprecher, Nurit (Nokia - IL/Kfar Sava) <nurit.sprecher@nokia.com =
<mailto:nurit.sprecher@nokia.com>>; philip.eardley@bt.com =
<mailto:philip.eardley@bt.com>; galis.alex@gmail.com =
<mailto:galis.alex@gmail.com>; NetSlices@ietf.org =
<mailto:NetSlices@ietf.org>
> Cc: Sartori, Cinzia (Nokia - DE/Munich) =
<cinzia.sartori@nokia-bell-labs.com =
<mailto:cinzia.sartori@nokia-bell-labs.com>>; Andrianov, Anatoly (Nokia =
- US/Arlington Heights) <anatoly.andrianov@nokia.com =
<mailto:anatoly.andrianov@nokia.com>>; a.galis@ucl.ac.uk =
<mailto:a.galis@ucl.ac.uk>
> Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF =
99 in Prague
> =20
> Hello Nurit,
> =20
> Thanks for share in concise manner.
> =20
> Conceptually, the definitions make sense. Of all the definitions below =
network service looks most precise to me. NGMN=E2=80=99s version of a =
slice instance says a lot and 3GPP=E2=80=99s says very little (dependent =
on network slice template).
> =20
> Speaking for myself, some points where we may need to alter these =
definitions - =20
> 1.      a clear association between a network service and a slice [is =
service =3D slice or slice =3D composition of (services) or both].
> Nurit: this is not really accurate.
> Slice is not a ETSI NFV NS and is not a composition of those. Slice =
(in 3GPP terms) is a layer above NS (set of 3GPP applications with =
corresponding application links and configurations) where NS is just a =
set (optionally interconnected) of =E2=80=9Cblack boxes=E2=80=9D a.k.a. =
ETSI NFV defined VNFs and PNFs with some recursion allowed. In SA5 we =
plan to define a 1:1 mapping between slice subnet (3GPP term) and NS =
(NFV term). Where our subnet will be =E2=80=9CNS+=E2=80=9D (contain all =
the application info such as application topology, configuration, =
etc=E2=80=A6).
> For IETF slice (if scope is similar to ETSI NFV and is application =
agnostic), it may be OK to state that IETF slice is equal to ETSI NFV =
NS.
> =20
> 2.      Slice template to be a management or orchestration concept and =
should not be of any/major significance in control or data plane. =
Therefore, definition of a slice instance should be independent of a =
slice template. For control plane an instance could be a =E2=80=9Cset or =
single resource specification(s)=E2=80=9D.
> Nurit: This is the view of 3GPP SA5 =E2=80=93 slice template is a =
special kind of subnet template (I believe a slice is just a special =
kind of a subnet). A subnet template will contain 3GPP MIB (application =
specific topology), some slice specific parameters (e.g. requirements =
for isolation, features such as support of mobility, etc=E2=80=A6) and =
the whole NSD of the corresponding ETSI NFV NS (NSD contains forwarding =
graphs, etc=E2=80=A6).
> =20
> 3.      Basing on strict resource isolation for many services, I am =
unsure about sharing of sub-network instances as mentioned below.
> Nurit: The high level isolation requirement was security specific =E2=80=
=93 to address security concerns in special cases, not from the resource =
management perspective.
> =20
> These definitions are good - it should be okay to tweak them (not =
reinvent) so that their meaning is not lost and IETF=E2=80=99s scope is =
clear as well.
> As mentioned below, the definition  in 3GPP may still change, but it =
is highly important to align to ensure consistent definitions across the =
industry.=20
> =20
> Regards
> Kiran
> =20
> From: Netslices <netslices-bounces@ietf.org =
<mailto:netslices-bounces@ietf.org>> on behalf of "Sprecher, Nurit =
(Nokia - IL/Kfar Sava)" <nurit.sprecher@nokia.com =
<mailto:nurit.sprecher@nokia.com>>
> Date: Thursday, May 11, 2017 at 11:33 AM
> To: "philip.eardley@bt.com <mailto:philip.eardley@bt.com>" =
<philip.eardley@bt.com <mailto:philip.eardley@bt.com>>, =
"galis.alex@gmail.com <mailto:galis.alex@gmail.com>" =
<galis.alex@gmail.com <mailto:galis.alex@gmail.com>>, =
"NetSlices@ietf.org <mailto:NetSlices@ietf.org>" <NetSlices@ietf.org =
<mailto:NetSlices@ietf.org>>
> Cc: "Sartori, Cinzia (Nokia - DE/Munich)" =
<cinzia.sartori@nokia-bell-labs.com =
<mailto:cinzia.sartori@nokia-bell-labs.com>>, "Andrianov, Anatoly (Nokia =
- US/Arlington Heights)" <anatoly.andrianov@nokia.com =
<mailto:anatoly.andrianov@nokia.com>>, "a.galis" <a.galis@ucl.ac.uk =
<mailto:a.galis@ucl.ac.uk>>
> Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF =
99 in Prague
> =20
> Hello,
> As the information is publicly open, I am happy to share:
> These are the current definitions:
> - NS - term used in 3GPP SA5 specifications to refer to a "network =
service" defined in ETSI NFV GS NFV003:
> network service: composition of Network Functions and defined by its =
functional and behavioral specification
> NOTE: The Network Service contributes to the behavior of the higher =
layer service, which is characterized by at least performance, =
dependability, and security specifications. The end-to-end network =
service behavior
> is the result of the combination of the individual network function =
behaviors as well as the behaviors of the network infrastructure =
composition mechanism.
> =20
> - NSI - term used in 3GPP SA5 specifications to refer to "network =
slice instance" defined in NGMN White Paper "Description of Network =
Slicing Concept":
> Network Slice Instance: a set of network functions, and resources to =
run these network functions, forming a complete instantiated logical =
network to meet certain network characteristics required by the Service =
Instance(s):
> -              A network slice instance may be fully or partly, =
logically and/or physically, isolated from another network slice =
instance.
> -              The resources comprises of physical and logical =
resources.
> -              A Network Slice Instance may be composed of Sub-network =
Instances, which as a special case may be shared by multiple network =
slice instances. The Network Slice Instance is defined by a Network =
Slice Blueprint.
> -              Instance-specific policies and configurations are =
required when creating a Network Slice Instance.
> -              Network characteristics examples are ultra-low-latency, =
ultra-reliability, etc.
> =20
> The definitions of NSI in 3GPP SA2 and SA5 may be changing.
> =20
> SA5 slice definition is (as documented in the latest draft TR 28.801):
> network slice instance: a set of network functions and the resources =
for these network functions which are arranged and configured, forming a =
complete logical network to meet certain network characteristics
> =20
> SA2 definitions (from TR 23.799):
> Network Slice Template (NST): is a logical representation of the =
Network Function(s) and corresponding resource requirements necessary to =
provide the required telecommunication services and network =
capabilities.
> Network Slice Instance (NSI): is an instance created from a Network =
Slice Template (NST).
> Network Slice: is a concept describing a system behavior which is =
implemented via Network Slice Instance(s).
> Best regards,
> Nurit
> =20
> From: philip.eardley@bt.com <mailto:philip.eardley@bt.com> =
[mailto:philip.eardley@bt.com <mailto:philip.eardley@bt.com>]=20
> Sent: Tuesday, May 09, 2017 1:42 PM
> To: Sprecher, Nurit (Nokia - IL/Kfar Sava) <nurit.sprecher@nokia.com =
<mailto:nurit.sprecher@nokia.com>>; galis.alex@gmail.com =
<mailto:galis.alex@gmail.com>; NetSlices@ietf.org =
<mailto:NetSlices@ietf.org>
> Cc: a.galis@ucl.ac.uk <mailto:a.galis@ucl.ac.uk>
> Subject: RE: [Netslices] Preparation for a Network Slicing BoF at IETF =
99 in Prague
> =20
> Could you explain the difference between a network slice and network =
service please?
> =20
> Is there a draft charter yet? =E2=80=93 happy to review it, but I =
could only find some slides on github
> =20
> Thanks
> phil
> =20
> Philip Eardley
> Research and Innovation
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> =20
> From: Netslices [mailto:netslices-bounces@ietf.org =
<mailto:netslices-bounces@ietf.org>] On Behalf Of Sprecher, Nurit (Nokia =
- IL/Kfar Sava)
> Sent: 05 May 2017 13:47
> To: Alex Galis <galis.alex@gmail.com <mailto:galis.alex@gmail.com>>; =
Network Slices <NetSlices@ietf.org <mailto:NetSlices@ietf.org>>
> Cc: Alex Galis <a.galis@ucl.ac.uk <mailto:a.galis@ucl.ac.uk>>
> Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF =
99 in Prague
> =20
> Hello,
> Thanks for the update.
> I assume that NS stands for Network Slicing.
> May I warmly recommend not to use it as such as NS is used by ETSI NFV =
for Network Service.
> Of course there is a close relationship=E2=80=A6.that is exactly why =
we should prevent confusion.
> Also, I am interested in reviewing these documents.
> Best regards,
> Nurit
> =20
> From: Netslices [mailto:netslices-bounces@ietf.org =
<mailto:netslices-bounces@ietf.org>] On Behalf Of Alex Galis
> Sent: Friday, May 05, 2017 1:34 PM
> To: Network Slices <NetSlices@ietf.org <mailto:NetSlices@ietf.org>>
> Cc: Alex Galis <a.galis@ucl.ac.uk <mailto:a.galis@ucl.ac.uk>>
> Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF =
99 in Prague
> =20
> Dear NetSlicing folks
> Re: Preparation for a Network Slicing BoF at IETF 99 in Prague
> Following our last successful workshop at IETF 98 (i.e. Monday 27th =
March 2017 - see enclosed short notes and minutes) a 20 strong group is =
progressing with development of 5 drafts which are both synchronised and =
crossed checked planed for release in early June 2017 in support for the =
planed Network Slicing BoF at IETF 99 in Prague:
> Network Slicing Drafts:
> Draft No1 -  Use cases & Requirements  (updates)
> Draft No2 -  Gap-Analysis
> Draft No3 -  Architecture/Framework + Definitions (updates)
> Draft No4 -  Problem Statement (updates)
> Draft No5 -  NS Charter (updates)
> Please note that all the above drafts will utilise and are based on an =
extended NS definition - only physical /logical partition of =
connectivity resources in a network - connectivity resource slicing  - =
is initially considered out of scope of these documents as inappropriate =
and insufficient for further work on Network Slicing.
> All versions of the above drafts are currently on the NetSlices Github =
repository https://github.com/netslices/IETF-NetSlices =
<https://github.com/netslices/IETF-NetSlices>
> =20
> =20
> Would you be so kind as to express your further interest in =
participating as contributors/reviewers to the above drafts by sending =
an interest message to my self (a.galis@ucl.ac.uk =
<mailto:a.galis@ucl.ac.uk>). I will include your email in this =
workgroup.
> In addition please post your GITHUB account to Kiran Makhijani =
<Kiran.Makhijani@huawei.com <mailto:Kiran.Makhijani@huawei.com>> for =
full write / read access to the NetSlices Github.
> =20
> We are preparing a Network Slicing BoF at IETF99 and your support and =
contributions would be both valued and appreciated.
> Thank you in advance
> Best Regards
> Alex
> =20
> =20
> On 29 Mar 2017, at 00:51, Alex Galis <a.galis@ucl.ac.uk =
<mailto:a.galis@ucl.ac.uk>> wrote:
> =20
> Dear NetSlicing folks,
>=20
> =20
>=20
> Re: NS side meeting =E2=80=93 IETF98 Monday 27th March 2017 =
18:15-21:15
>=20
> =20
>=20
> It was a great pleasure to meet some of you at the NS side meeting of =
Monday 27th March 2017 in Chicago.
> =20
>=20
> My short notes as minutes of this meeting as follows:
>=20
> 1.     Scope of the meeting: Scope of the NS meeting: Present and =
discuss use cases, architecture and identify technical problems to be =
address by future work at IETF
>=20
> 2.     An audience of approx 125 with a very full agenda
>=20
> I. Context & Revisited NS Problem Statement
>=20
> #01: =E2=80=9CIntroductory Document and Revised Problem Statement walk =
through=E2=80=9D =E2=80=93 presenter: Alex Galis - UCL - Huawei
> =20
>=20
> II. Towards NS Use Cases
>=20
> #02: =E2=80=9C5G Network Slicing - 3GPP Use Case background=E2=80=9D - =
presenter: Xavier DeFoy -InterDigital
>=20
> #03: =E2=80=9CGeneralized Market/Service Verticals with Network =
Slicing Use cases=E2=80=9D- presenter: K. Makhijani- Huawei
>=20
> #04: =E2=80=9CAn ICN service delivery prototype using slices=E2=80=9D =
- presenter: Ravi Ravindran - Huawei
> =20
>=20
> III. Towards Operators Ecosystem Viewpoints
>=20
> #05: =E2=80=9CNetwork Slicing architecture=E2=80=9D- presenter: Liang =
Geng =E2=80=93 China Mobile
>=20
> #06: =E2=80=9CNetwork Slicing: Technical Viewpoints and Functional =
Roles=E2=80=9D- presenter: Pedro Martinez-Julia =E2=80=93 NICT Japan
> =20
>=20
> III. Towards Manufactures Viewpoints
>=20
> #07: =E2=80=9CHow to slice Network Slicing for the IETF=E2=80=9D - =
presenter: H. Flinck - Nokia
>=20
> #08: =E2=80=9CACTN Virtual Network operation (with Network Slicing =
Insights)=E2=80=9D - presenter: G. Grammel - Juniper
>=20
> #09: =E2=80=9CAutomatic Network Slicing Management for Transport =
Network=E2=80=9D- presenter: Qiang Li - Huawei
>=20
> #10: =E2=80=9CForwarding Path & Signaling Management=E2=80=9D- =
presenter: S. Matsushima- SoftBank
> =20
>=20
> IV. Final Q&A & Conclusions: 30 mins
>=20
> All slides from the NS meeting are at: =
https://github.com/netslices/IETF- =
<https://github.com/netslices/IETF->NetSlices/tree/master/IETF98_Sidemeeti=
ng023.
>=20
> 3.     The presenters have identified a significant number of problem =
areas to be addressed at IETF in particular:
>=20
> 19 problem areas identified in #01
>=20
> 7 problem areas identified in #02
>=20
> 4 problem areas identified in #03
>=20
> 4 problem areas identified in #04
>=20
> 9 problem areas identified in #05
>=20
> 8 problem areas identified in #06
>=20
> 7 problem areas identified in #07
>=20
> 7 problem areas identified in #09
>=20
> 10 problem areas identified in #10
>=20
> =20
> 4.     Descriptive and/or prescriptive definitions for Network Slices =
were provided in #01, #05, #06, #07, #08
> =20
>=20
> 5.     Based on the audience response the following actions are =
recommended:
> =20
>=20
> =E2=80=A2 Action1: a WG forming BoF will be requested at the next =
IETF99 ( unanimous request)
> =20
> =E2=80=A2 Action2: approx 40 member of the audience showed their =
interest to contribute in the next 3 months to
>=20
> =E2=80=93      use cases,
>=20
> =E2=80=93      problem statements,
>=20
> =E2=80=93      requirements and architecture
>=20
> =E2=80=93      Exposure Interface specification and data model
>=20
> =E2=80=93      Efficient slice isolation with guarantees for isolation
> =20
> =E2=80=A2 Action 3: Unanimous request to review and consolidate a =
descriptive and prescriptive definition of NS
>=20
> =E2=80=A2 Action 4: A draft charter as problem statement for WG =
activities that would include:
>=20
>  - the description of the standardisation methods / algorithms within =
the scope of IETF and the related documents ( NS definition, reference =
models, use cases, etc.)
>=20
>  - a concrete work plan for 2 years
>=20
> This charter be edited with contributions from the NS members of the =
mailing list and made available at =
https://github.com/netslices/IETF-NetSlices =
<https://github.com/netslices/IETF-NetSlices>
>=20
>=20
> Thank you for all presenters and participants to the meeting which =
generated significant discussion and interest.
> =20
> Please add any further notes and/or further minutes for this NS side =
meeting
>=20
>=20
> Best Regards
>=20
> Alex
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
>=20
> =20
> =20


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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dutf-8" class=3D""><div style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Hi Nurit and All<div class=3D""><br class=3D""></div><div =
class=3D""><br class=3D""></div><div class=3D"">Please note the unified =
terms used in the last period in the IETF Network Slicing presentations =
at the IETF97 &amp; IETF98 and drafts=E2=80=99 work (i.e. gihhub =
repository:&nbsp;<a href=3D"https://github.com/alexgalis/IETF-NetSlices" =
class=3D"">https://github.com/alexgalis/IETF-NetSlices</a>)</div><div =
class=3D""><br class=3D""></div><div class=3D"">Best Regards</div><div =
class=3D"">Alex</div><div class=3D""><br class=3D""></div><div =
class=3D""><br class=3D""></div><div class=3D"">






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<!--StartFragment--><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" class=3D"">Resource Slice =
-
A grouping of physical or virtual (network, compute, storage) resources =
which.
It inherits the characteristics of the resources which are also bound to =
the
capability of the resource. A resource slice could be one of the =
component of
Network Slice, however on its own does not represent fully a Network =
Slice.<o:p class=3D""></o:p></span></p><div class=3D""><span =
style=3D"font-family:&quot;Courier New&quot;" class=3D"">&nbsp;</span><br =
class=3D"webkit-block-placeholder"></div><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" class=3D"">Network slice - =
A
Network slice is a managed group of subsets of resources, network =
functions /
network virtual functions at the data, control, management/orchestration =
planes
and services at a given time.&nbsp; Network
slice is programmable and has the ability to expose its capabilities. =
The
behaviour of the network slice realized via network slice =
instance(s).<o:p class=3D""></o:p></span></p><p =
class=3D"MsoPlainText"><span style=3D"font-family:&quot;Courier =
New&quot;" class=3D"">(1) The Service
Instance component <o:p class=3D""></o:p></span></p><p =
class=3D"MsoPlainText"><span style=3D"font-family:&quot;Courier =
New&quot;" class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Represents the =
end-user service or business
services. <o:p class=3D""></o:p></span></p><p class=3D"MsoPlainText"><span=
 style=3D"font-family:&quot;Courier New&quot;" =
class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; An instance of an end-user =
service or a
business service that is realized within or by a NS.&nbsp; <o:p =
class=3D""></o:p></span></p><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" =
class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Would be provided by the =
network operator
or by 3rd parties.<o:p class=3D""></o:p></span></p><p =
class=3D"MsoPlainText"><span style=3D"font-family:&quot;Courier =
New&quot;" class=3D"">&nbsp;(2) A Network Slice Instance component <o:p =
class=3D""></o:p></span></p><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" =
class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Represented by a set of =
network functions,
virtual network functions and resources at a given time<o:p =
class=3D""></o:p></span></p><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" =
class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Forms a complete =
instantiated logical
network to meet certain network characteristics required by the Service
Instance(s).&nbsp; <o:p class=3D""></o:p></span></p><p =
class=3D"MsoPlainText"><span style=3D"font-family:&quot;Courier =
New&quot;" class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Provides network =
characteristics which are
required by a Service Instance. <o:p class=3D""></o:p></span></p><p =
class=3D"MsoPlainText"><span style=3D"font-family:&quot;Courier =
New&quot;" class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; May also be =
shared across multiple Service
Instances<o:p class=3D""></o:p></span></p><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" class=3D"">&nbsp;(3) =
Resources component =E2=80=93 it includes:
Physical, Logical &amp; Virtual resources<o:p =
class=3D""></o:p></span></p><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" =
class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Physical &amp; Logical =
resources - An
independently manageable partition of a physical resource, which =
inherits the
same characteristics as the physical resource and whose capability is =
bound to
the capability of the physical resource.&nbsp;
It is dedicated to a Network Function or shared between a set of Network
Functions. <o:p class=3D""></o:p></span></p><p =
class=3D"MsoPlainText"><span style=3D"font-family:&quot;Courier =
New&quot;" class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Virtual =
resources - An abstraction of a
physical or logical resource, which may have different characteristics =
from
that resource, and whose capability may not be bound to the capability =
of that
resource.<o:p class=3D""></o:p></span></p><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" class=3D"">&nbsp;(4) Slice =
Element Manager (SEM) and Capability
exposure component<o:p class=3D""></o:p></span></p><p =
class=3D"MsoPlainText"><span style=3D"font-family:&quot;Courier =
New&quot;" class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Slice Element =
Manager (SEM) is instantiated
in each Network Slice and it manages all access permissions and all =
interaction
between a Network Slice and external functions (i.e. other Network =
Slices,
Orchestrators, etc). Each SEM converts requirements from orchestrator =
into
virtual resources and manages virtual resources of a slice. SEM also =
exchanges
information of virtual resources with other slice element managers via a
dedicated resource interface.<o:p class=3D""></o:p></span></p><p =
class=3D"MsoPlainText"><span style=3D"font-family:&quot;Courier =
New&quot;" class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Allow 3rd =
parties to access via APIs
information regarding services provided by the slice (e.g. connectivity
information, QoS, mobility, autonomicity, etc.)<o:p =
class=3D""></o:p></span></p><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" =
class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; Allow dynamical =
customization of the
network characteristics for different diverse use cases within the =
limits set
of functions by the operator.&nbsp; Network
slice enables the operator to create networks customized to provide =
flexible
solutions for different market scenarios, which have diverse =
requirements, with
respect to the functionality, performance and resource separation.<o:p =
class=3D""></o:p></span></p><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" =
class=3D"">=E2=80=A2&nbsp;&nbsp;&nbsp;&nbsp; It includes a description =
of the structure
(and contained components) and configuration of the slice instance.<o:p =
class=3D""></o:p></span></p><div class=3D""><span =
style=3D"font-family:&quot;Courier New&quot;" class=3D"">&nbsp;</span><br =
class=3D"webkit-block-placeholder"></div><p class=3D"MsoPlainText"><span =
style=3D"font-family:&quot;Courier New&quot;" class=3D"">Network slice
template - A complete description of the structure, configuration and =
the
plans/work flows for how to instantiate and control the Network Slice =
Instance
during its life cycle.<o:p class=3D""></o:p></span></p><div =
class=3D""><span style=3D"font-family:&quot;Courier New&quot;" =
class=3D"">&nbsp;</span><br class=3D"webkit-block-placeholder"></div><p =
class=3D"MsoPlainText"><span style=3D"font-family:&quot;Courier =
New&quot;" class=3D"">Network Slice
Instance - An activated network slice. It is created based on network =
template.
A set of managed run-time network functions, and resources to run these =
network
functions, forming a complete instantiated logical network to meet =
certain
network characteristics required by the service instance(s). It provides =
the
network characteristics that are required by a service instance. A =
network
slice instance may also be shared across multiple service instances =
provided by
the network operator. The network slice instance may be composed by =
none, one
or more sub-network instances, which may be shared by another network =
slice
instance.<o:p class=3D""></o:p></span></p>

<!--EndFragment--><div class=3D""><blockquote type=3D"cite" =
class=3D""><div class=3D"">On 12 May 2017, at 10:53, Sprecher, Nurit =
(Nokia - IL/Kfar Sava) &lt;<a href=3D"mailto:nurit.sprecher@nokia.com" =
class=3D"">nurit.sprecher@nokia.com</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; font-family: =
ArialMT; font-size: 12px; font-style: normal; font-variant-caps: normal; =
font-weight: normal; letter-spacing: normal; orphans: auto; text-align: =
start; text-indent: 0px; text-transform: none; white-space: normal; =
widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
background-color: rgb(255, 255, 255);"><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Hello,<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">Please see inline.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">Best regards,<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">Nurit<o:p class=3D""></o:p></span></div><div=
 style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div class=3D""><div =
style=3D"border-style: solid none none; border-top-color: rgb(225, 225, =
225); border-top-width: 1pt; padding: 3pt 0in 0in;" class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><b class=3D""><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">From:</span></b><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span =
class=3D"Apple-converted-space">&nbsp;</span>Kiran.Makhijani [<a =
href=3D"mailto:Kiran.Makhijani@huawei.com" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">mailto:Kiran.Makhijani@huawei.com</a>]<span =
class=3D"Apple-converted-space">&nbsp;</span><br class=3D""><b =
class=3D"">Sent:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Thursday, May 11, 2017 =
10:45 PM<br class=3D""><b class=3D"">To:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Sprecher, Nurit (Nokia - =
IL/Kfar Sava) &lt;<a href=3D"mailto:nurit.sprecher@nokia.com" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">nurit.sprecher@nokia.com</a>&gt;;<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:philip.eardley@bt.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">philip.eardley@bt.com</a>;<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:galis.alex@gmail.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">galis.alex@gmail.com</a>;<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:NetSlices@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D"">NetSlices@ietf.org</a><br =
class=3D""><b class=3D"">Cc:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Sartori, Cinzia (Nokia - =
DE/Munich) &lt;<a href=3D"mailto:cinzia.sartori@nokia-bell-labs.com" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">cinzia.sartori@nokia-bell-labs.com</a>&gt;; Andrianov, =
Anatoly (Nokia - US/Arlington Heights) &lt;<a =
href=3D"mailto:anatoly.andrianov@nokia.com" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">anatoly.andrianov@nokia.com</a>&gt;;<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:a.galis@ucl.ac.uk" style=3D"color: purple; =
text-decoration: underline;" class=3D"">a.galis@ucl.ac.uk</a><br =
class=3D""><b class=3D"">Subject:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Re: [Netslices] Preparation =
for a Network Slicing BoF at IETF 99 in Prague<o:p =
class=3D""></o:p></span></div></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">Hello Nurit,<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span lang=3D"EN-GB" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">Thanks for share in =
concise manner.<o:p class=3D""></o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">Conceptually, the definitions make =
sense. Of all the definitions below network service looks most precise =
to me. NGMN=E2=80=99s version of a slice instance says a lot and =
3GPP=E2=80=99s says very little (dependent on network slice =
template).<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">Speaking for myself, some points where =
we may need to alter these definitions - &nbsp;<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 12pt; font-family: 'Times New Roman', serif; =
text-indent: -0.25in;" class=3D""><span lang=3D"EN-GB" style=3D"font-size:=
 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
class=3D"">1.<span style=3D"font-style: normal; font-variant-caps: =
normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman';" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
dir=3D"LTR" class=3D""></span><span lang=3D"EN-GB" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">a clear association =
between a network service and a slice [is service =3D slice or slice =3D =
composition of (services) or both].<o:p class=3D""></o:p></span></div><div=
 style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
'Times New Roman', serif; line-height: 18.399999618530273px;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; line-height: =
16.866666793823242px; font-family: Calibri, sans-serif; color: red;" =
class=3D"">Nurit: this is not really accurate.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 12pt; font-family: 'Times New Roman', serif; =
line-height: 18.399999618530273px;" class=3D""><span lang=3D"EN-GB" =
style=3D"font-size: 11pt; line-height: 16.866666793823242px; =
font-family: Calibri, sans-serif; color: red;" class=3D"">Slice is not a =
ETSI NFV NS and is not a composition of those. Slice (in 3GPP terms) is =
a layer above NS (set of 3GPP applications with corresponding =
application links and configurations) where NS is just a set (optionally =
interconnected) of =E2=80=9Cblack boxes=E2=80=9D a.k.a. ETSI NFV defined =
VNFs and PNFs with some recursion allowed. In SA5 we plan to define a =
1:1 mapping between slice subnet (3GPP term) and NS (NFV term). Where =
our subnet will be =E2=80=9CNS+=E2=80=9D (contain all the application =
info such as application topology, configuration, etc=E2=80=A6).<br =
class=3D"">For IETF slice (if scope is similar to ETSI NFV and is =
application agnostic), it may be OK to state that IETF slice is equal to =
ETSI NFV NS.</span><span lang=3D"EN-GB" style=3D"font-size: 11pt; =
line-height: 16.866666793823242px; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D""></o:p></span></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: 'Times New Roman', serif; =
text-indent: -0.25in;" class=3D""><span lang=3D"EN-GB" style=3D"font-size:=
 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
class=3D"">2.<span style=3D"font-style: normal; font-variant-caps: =
normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman';" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
dir=3D"LTR" class=3D""></span><span lang=3D"EN-GB" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">Slice template to be =
a management or orchestration concept and should not be of any/major =
significance in control or data plane. Therefore, definition of a slice =
instance should be independent of a slice template. For control plane an =
instance could be a =E2=80=9Cset or single resource =
specification(s)=E2=80=9D.<o:p class=3D""></o:p></span></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
'Times New Roman', serif;" class=3D""><span lang=3D"EN-GB" =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: red;" =
class=3D"">Nurit: This is the view of 3GPP SA5 =E2=80=93 slice template =
is a special kind of subnet template (I believe a slice is just a =
special kind of a subnet). A subnet template will contain 3GPP MIB =
(application specific topology), some slice specific parameters (e.g. =
requirements for isolation, features such as support of mobility, =
etc=E2=80=A6) and the whole NSD of the corresponding ETSI NFV NS (NSD =
contains forwarding graphs, etc=E2=80=A6).</span><span lang=3D"EN-GB" =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D""></o:p></span></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 12pt; font-family: 'Times New Roman', serif; =
text-indent: -0.25in;" class=3D""><span lang=3D"EN-GB" style=3D"font-size:=
 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
class=3D"">3.<span style=3D"font-style: normal; font-variant-caps: =
normal; font-weight: normal; font-size: 7pt; line-height: normal; =
font-family: 'Times New Roman';" =
class=3D"">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span =
class=3D"Apple-converted-space">&nbsp;</span></span></span></span><span =
dir=3D"LTR" class=3D""></span><span lang=3D"EN-GB" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">Basing on strict =
resource isolation for many services, I am unsure about sharing of =
sub-network instances as mentioned below.<o:p =
class=3D""></o:p></span></div><ol start=3D"4" type=3D"1" =
style=3D"margin-bottom: 0in; margin-top: 0in;" class=3D""><li =
class=3D"MsoNormal" style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;"><span lang=3D"EN-GB" =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: red;" =
class=3D"">Nurit: The high level isolation requirement was security =
specific =E2=80=93 to address security concerns in special cases, not =
from the resource management perspective.</span><span lang=3D"EN-GB" =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D""></o:p></span></li></ol><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 12pt; font-family: =
'Times New Roman', serif; line-height: 18.399999618530273px;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; line-height: =
16.866666793823242px; font-family: Calibri, sans-serif; color: red;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D"">These definitions are good =
- it should be okay to tweak them (not reinvent) so that their meaning =
is not lost and IETF=E2=80=99s scope is clear as well.<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt =
0.5in; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: red;" class=3D"">As mentioned below, the =
definition &nbsp;in 3GPP may still change, but it is highly important to =
align to ensure consistent definitions across the industry.<span =
class=3D"Apple-converted-space">&nbsp;</span><o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D"">&nbsp;</o:p></span></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Regards<o:p =
class=3D""></o:p></span></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Kiran</span><span lang=3D"EN-GB" =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><o:p class=3D""></o:p></span></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><o:p =
class=3D"">&nbsp;</o:p></span></div><div style=3D"border-style: solid =
none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; =
padding: 3pt 0in 0in;" class=3D""><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><b class=3D""><span style=3D"font-family: Calibri, =
sans-serif;" class=3D"">From:<span =
class=3D"Apple-converted-space">&nbsp;</span></span></b><span =
style=3D"font-family: Calibri, sans-serif;" class=3D"">Netslices &lt;<a =
href=3D"mailto:netslices-bounces@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D"">netslices-bounces@ietf.org</a>&gt;=
 on behalf of "Sprecher, Nurit (Nokia - IL/Kfar Sava)" &lt;<a =
href=3D"mailto:nurit.sprecher@nokia.com" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">nurit.sprecher@nokia.com</a>&gt;<br class=3D""><b =
class=3D"">Date:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Thursday, May 11, 2017 =
at 11:33 AM<br class=3D""><b class=3D"">To:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>"<a =
href=3D"mailto:philip.eardley@bt.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">philip.eardley@bt.com</a>" =
&lt;<a href=3D"mailto:philip.eardley@bt.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">philip.eardley@bt.com</a>&gt;, =
"<a href=3D"mailto:galis.alex@gmail.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">galis.alex@gmail.com</a>" &lt;<a =
href=3D"mailto:galis.alex@gmail.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">galis.alex@gmail.com</a>&gt;, =
"<a href=3D"mailto:NetSlices@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D"">NetSlices@ietf.org</a>" &lt;<a =
href=3D"mailto:NetSlices@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D"">NetSlices@ietf.org</a>&gt;<br =
class=3D""><b class=3D"">Cc:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>"Sartori, Cinzia (Nokia =
- DE/Munich)" &lt;<a href=3D"mailto:cinzia.sartori@nokia-bell-labs.com" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">cinzia.sartori@nokia-bell-labs.com</a>&gt;, "Andrianov, =
Anatoly (Nokia - US/Arlington Heights)" &lt;<a =
href=3D"mailto:anatoly.andrianov@nokia.com" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">anatoly.andrianov@nokia.com</a>&gt;, "a.galis" &lt;<a =
href=3D"mailto:a.galis@ucl.ac.uk" style=3D"color: purple; =
text-decoration: underline;" class=3D"">a.galis@ucl.ac.uk</a>&gt;<br =
class=3D""><b class=3D"">Subject:<span =
class=3D"Apple-converted-space">&nbsp;</span></b>Re: [Netslices] =
Preparation for a Network Slicing BoF at IETF 99 in Prague<o:p =
class=3D""></o:p></span></div></div><div class=3D""><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><o:p class=3D"">&nbsp;</o:p></div></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">Hello,<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">As the information is publicly open, I =
am happy to share:<o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">These are the current definitions:<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt 0.5in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">- NS - =
term used in 3GPP SA5 specifications to refer to a "<b class=3D"">network =
service</b>" defined in<span =
class=3D"Apple-converted-space">&nbsp;</span><b class=3D"">ETSI NFV GS =
NFV003</b>:<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt 1in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><b class=3D"">network service</b>: composition of Network =
Functions and defined by its functional and behavioral specification<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt 1in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">NOTE: The =
Network Service contributes to the behavior of the higher layer service, =
which is characterized by at least performance, dependability, and =
security specifications. The end-to-end network service behavior<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt 1in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">is the =
result of the combination of the individual network function behaviors =
as well as the behaviors of the network infrastructure composition =
mechanism.<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">- NSI - term used in 3GPP SA5 specifications to refer to "<b =
class=3D"">network slice instance</b>" defined in<span =
class=3D"Apple-converted-space">&nbsp;</span><b class=3D"">NGMN White =
Paper "Description of Network Slicing Concept</b>":<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt 1in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><b =
class=3D"">Network Slice Instance</b>: a set of network functions, and =
resources to run these network functions, forming a complete =
instantiated logical network to meet certain network characteristics =
required by the Service Instance(s):<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 11pt; font-family: =
Calibri, sans-serif;" =
class=3D"">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; A network slice instance may be fully or partly, =
logically and/or physically, isolated from another network slice =
instance.<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt 1in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; The resources comprises of physical and logical =
resources.<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt 1in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; A Network Slice Instance may be composed of Sub-network =
Instances, which as a special case may be shared by multiple network =
slice instances. The Network Slice Instance is defined by a Network =
Slice Blueprint.<o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt 1in; font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; Instance-specific policies and configurations are =
required when creating a Network Slice Instance.<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt 1in; =
font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&n=
bsp;&nbsp;&nbsp; Network characteristics examples are ultra-low-latency, =
ultra-reliability, etc.<o:p class=3D""></o:p></div><div style=3D"margin: =
0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">&nbsp;<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><b class=3D"">The definitions of NSI in =
3GPP SA2 and SA5 may be changing</b>.<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">&nbsp;<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 0.5in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">SA5 slice definition is (as documented =
in the latest draft TR 28.801):<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><b class=3D"">network slice =
instance</b>: a set of network functions and the resources for these =
network functions which are arranged and configured, forming a complete =
logical network to meet certain network characteristics<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt 0.5in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt 0.5in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D"">SA2 =
definitions (from TR 23.799):<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><b class=3D"">Network Slice =
Template</b><span class=3D"Apple-converted-space">&nbsp;</span>(NST): is =
a logical representation of the Network Function(s) and corresponding =
resource requirements necessary to provide the required =
telecommunication services and network capabilities.<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt 1in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><b =
class=3D"">Network Slice Instance (NSI):</b><span =
class=3D"Apple-converted-space">&nbsp;</span>is an instance created from =
a Network Slice Template (NST).<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt 1in; font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D""><b class=3D"">Network Slice</b>: is a =
concept describing a system behavior which is implemented via Network =
Slice Instance(s).<o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif;" class=3D"">Best regards,</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D"">Nurit</span><o:p class=3D""></o:p></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div><div class=3D""><div style=3D"border-style: solid =
none none; border-top-color: rgb(225, 225, 225); border-top-width: 1pt; =
padding: 3pt 0in 0in;" class=3D""><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><b class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">From:</span></b><span style=3D"font-size:=
 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:philip.eardley@bt.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">philip.eardley@bt.com</a><span =
class=3D"Apple-converted-space">&nbsp;</span>[<a =
href=3D"mailto:philip.eardley@bt.com" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">mailto:philip.eardley@bt.com</a>]<span =
class=3D"Apple-converted-space">&nbsp;</span><br class=3D""><b =
class=3D"">Sent:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Tuesday, May 09, 2017 1:42 =
PM<br class=3D""><b class=3D"">To:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Sprecher, Nurit (Nokia - =
IL/Kfar Sava) &lt;<a href=3D"mailto:nurit.sprecher@nokia.com" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">nurit.sprecher@nokia.com</a>&gt;;<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:galis.alex@gmail.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">galis.alex@gmail.com</a>;<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:NetSlices@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D"">NetSlices@ietf.org</a><br =
class=3D""><b class=3D"">Cc:</b><span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"mailto:a.galis@ucl.ac.uk" style=3D"color: purple; =
text-decoration: underline;" class=3D"">a.galis@ucl.ac.uk</a><br =
class=3D""><b class=3D"">Subject:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>RE: [Netslices] Preparation =
for a Network Slicing BoF at IETF 99 in Prague</span><o:p =
class=3D""></o:p></div></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Could you =
explain the difference between a network slice and network service =
please?</span><o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" class=3D"">Is =
there a draft charter yet? =E2=80=93 happy to review it, but I could =
only find some slides on github</span><o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span lang=3D"EN-GB" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Thanks</span><o:p class=3D""></o:p></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">phil</span><o:p class=3D""></o:p></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span lang=3D"EN-GB" style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span lang=3D"EN" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Philip Eardley</span><o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span lang=3D"EN" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Research and Innovation</span><o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span lang=3D"EN" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">This email contains BT information, which may be privileged =
or confidential. It's meant only for the individual(s) or entity named =
above. If you're not the intended recipient, note that disclosing, =
copying, distributing or using this information is prohibited. If you've =
received this email in error, please let me know immediately on the =
email address above. Thank you.<br class=3D"">We monitor our email =
system, and may record your emails.</span><o:p class=3D""></o:p></div><div=
 style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span lang=3D"EN" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">British Telecommunications plc<br class=3D"">Registered =
office: 81 Newgate Street London EC1A 7AJ<br class=3D"">Registered in =
England no: 1800000</span><o:p class=3D""></o:p></div></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span lang=3D"EN-GB" style=3D"font-size: =
11pt; font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">&nbsp;</span><o:p class=3D""></o:p></div><div class=3D""><div =
style=3D"border-style: solid none none; border-top-color: rgb(225, 225, =
225); border-top-width: 1pt; padding: 3pt 0in 0in;" class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><b class=3D""><span style=3D"font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D"">From:</span></b><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif;" =
class=3D""><span class=3D"Apple-converted-space">&nbsp;</span>Netslices =
[<a href=3D"mailto:netslices-bounces@ietf.org" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">mailto:netslices-bounces@ietf.org</a>]<span =
class=3D"Apple-converted-space">&nbsp;</span><b class=3D"">On Behalf =
Of<span class=3D"Apple-converted-space">&nbsp;</span></b>Sprecher, Nurit =
(Nokia - IL/Kfar Sava)<br class=3D""><b class=3D"">Sent:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>05 May 2017 13:47<br =
class=3D""><b class=3D"">To:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Alex Galis &lt;<a =
href=3D"mailto:galis.alex@gmail.com" style=3D"color: purple; =
text-decoration: underline;" class=3D"">galis.alex@gmail.com</a>&gt;; =
Network Slices &lt;<a href=3D"mailto:NetSlices@ietf.org" style=3D"color: =
purple; text-decoration: underline;" =
class=3D"">NetSlices@ietf.org</a>&gt;<br class=3D""><b =
class=3D"">Cc:</b><span class=3D"Apple-converted-space">&nbsp;</span>Alex =
Galis &lt;<a href=3D"mailto:a.galis@ucl.ac.uk" style=3D"color: purple; =
text-decoration: underline;" class=3D"">a.galis@ucl.ac.uk</a>&gt;<br =
class=3D""><b class=3D"">Subject:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Re: [Netslices] Preparation =
for a Network Slicing BoF at IETF 99 in Prague</span><o:p =
class=3D""></o:p></div></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span lang=3D"EN-GB" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">Hello,</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">Thanks for the update.</span><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D""><span =
style=3D"font-size: 11pt; font-family: Calibri, sans-serif; color: =
rgb(31, 73, 125);" class=3D"">I assume that NS stands for Network =
Slicing.</span><o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">May I warmly recommend =
not to use it as such as NS is used by ETSI NFV for Network =
Service.</span><o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Of course there is a =
close relationship=E2=80=A6.that is exactly why we should prevent =
confusion.</span><o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">Also, I am interested =
in reviewing these documents.</span><o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Best regards,</span><o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D""><span style=3D"font-size: 11pt; =
font-family: Calibri, sans-serif; color: rgb(31, 73, 125);" =
class=3D"">Nurit</span><o:p class=3D""></o:p></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D""><span style=3D"font-size: 11pt; font-family: Calibri, =
sans-serif; color: rgb(31, 73, 125);" class=3D"">&nbsp;</span><o:p =
class=3D""></o:p></div><div class=3D""><div style=3D"border-style: solid =
none none; border-top-color: rgb(225, 225, 225); border-top-width: 1pt; =
padding: 3pt 0in 0in;" class=3D""><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><b class=3D""><span style=3D"font-size: 11pt; font-family: =
Calibri, sans-serif;" class=3D"">From:</span></b><span style=3D"font-size:=
 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
class=3D"Apple-converted-space">&nbsp;</span>Netslices [<a =
href=3D"mailto:netslices-bounces@ietf.org" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">mailto:netslices-bounces@ietf.org</a>]<span =
class=3D"Apple-converted-space">&nbsp;</span><b class=3D"">On Behalf =
Of<span class=3D"Apple-converted-space">&nbsp;</span></b>Alex Galis<br =
class=3D""><b class=3D"">Sent:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Friday, May 05, 2017 1:34 =
PM<br class=3D""><b class=3D"">To:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Network Slices &lt;<a =
href=3D"mailto:NetSlices@ietf.org" style=3D"color: purple; =
text-decoration: underline;" class=3D"">NetSlices@ietf.org</a>&gt;<br =
class=3D""><b class=3D"">Cc:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Alex Galis &lt;<a =
href=3D"mailto:a.galis@ucl.ac.uk" style=3D"color: purple; =
text-decoration: underline;" class=3D"">a.galis@ucl.ac.uk</a>&gt;<br =
class=3D""><b class=3D"">Subject:</b><span =
class=3D"Apple-converted-space">&nbsp;</span>Re: [Netslices] Preparation =
for a Network Slicing BoF at IETF 99 in Prague</span><o:p =
class=3D""></o:p></div></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">Dear NetSlicing folks<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">Re: Preparation for a Network Slicing BoF =
at IETF 99 in Prague<o:p class=3D""></o:p></div><div style=3D"margin: =
0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', =
serif;" class=3D"">Following our last successful workshop at IETF 98 =
(i.e. Monday 27th March 2017 - see enclosed short notes and minutes) a =
20 strong group is progressing with development of 5 drafts which are =
both synchronised and crossed checked planed for release in early June =
2017 in support for the planed&nbsp;Network Slicing BoF at IETF 99 in =
Prague:<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">Network Slicing Drafts:<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">Draft No1 -&nbsp; Use cases &amp; =
Requirements&nbsp; (updates)<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">Draft No2 -&nbsp; Gap-Analysis<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D"">Draft =
No3 -&nbsp; Architecture/Framework + Definitions (updates)<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" class=3D"">Draft =
No4 -&nbsp; Problem Statement (updates)<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">Draft No5 -&nbsp; NS Charter =
(updates)<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">Please note that all the above drafts will utilise and are =
based on an extended NS definition - only physical /logical partition of =
connectivity resources in a network - connectivity resource =
slicing&nbsp; - is initially considered out of scope of these documents =
as inappropriate and insufficient for further work on Network =
Slicing.<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">All versions of the above drafts are currently on the =
NetSlices Github repository<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"https://github.com/netslices/IETF-NetSlices" style=3D"color: =
purple; text-decoration: underline;" =
class=3D"">https://github.com/netslices/IETF-NetSlices</a><o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">Would you be so kind as to express your further interest in =
participating as contributors/reviewers to the above drafts by sending =
an interest message to my self (<a href=3D"mailto:a.galis@ucl.ac.uk" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">a.galis@ucl.ac.uk</a>). I will include your email in this =
workgroup.<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">In addition please post your GITHUB account to Kiran =
Makhijani &lt;<a href=3D"mailto:Kiran.Makhijani@huawei.com" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">Kiran.Makhijani@huawei.com</a>&gt; for full write / read =
access to the NetSlices Github.<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">&nbsp;<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">We are preparing a Network Slicing BoF at =
IETF99 and your support and contributions would be both valued and =
appreciated.<o:p class=3D""></o:p></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">Thank you in advance<o:p class=3D""></o:p></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">Best Regards<o:p =
class=3D""></o:p></div><div style=3D"margin: 0in 0in 0.0001pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">Alex<o:p class=3D""></o:p></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div><div class=3D""><blockquote =
style=3D"margin-top: 5pt; margin-bottom: 5pt;" class=3D""><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D"">On 29 Mar 2017, at =
00:51, Alex Galis &lt;<a href=3D"mailto:a.galis@ucl.ac.uk" style=3D"color:=
 purple; text-decoration: underline;" class=3D"">a.galis@ucl.ac.uk</a>&gt;=
 wrote:<o:p class=3D""></o:p></div></div><div style=3D"margin: 0in 0in =
0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D"">&nbsp;<o:p class=3D""></o:p></div><div class=3D""><div =
class=3D""><div style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; =
font-family: 'Times New Roman', serif;" class=3D"">Dear NetSlicing =
folks,<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">Re: NS side meeting =E2=80=93 IETF98 Monday 27th&nbsp;March =
2017 18:15-21:15<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">It was a great pleasure to meet some of you&nbsp;at the NS =
side meeting of Monday 27th&nbsp;March 2017 in Chicago.<br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">My short notes as minutes =
of this meeting&nbsp;as follows:<o:p class=3D""></o:p></div><div =
class=3D""><p class=3D"MsoNormal" style=3D"margin: 0in 0in 12pt; =
font-size: 12pt; font-family: 'Times New Roman', serif;"><br =
class=3D"">1.&nbsp; &nbsp;&nbsp;&nbsp;Scope of the meeting: Scope =
of&nbsp;the NS meeting: Present and discuss use cases, architecture and =
identify&nbsp;technical problems to be address by&nbsp;future work at =
IETF<br class=3D""><br class=3D"">2.&nbsp; &nbsp;&nbsp;&nbsp;An audience =
of approx 125 with&nbsp;a very full agenda<br class=3D""><br class=3D"">I.=
 Context &amp; Revisited NS Problem Statement<br class=3D""><br =
class=3D"">#01: =E2=80=9CIntroductory Document and Revised Problem =
Statement walk&nbsp;through=E2=80=9D =E2=80=93 presenter: Alex Galis - =
UCL - Huawei<br class=3D"">&nbsp;<br class=3D""><br class=3D"">II. =
Towards NS Use Cases<br class=3D""><br class=3D"">#02: =E2=80=9C5G =
Network Slicing - 3GPP Use Case background=E2=80=9D - presenter: =
Xavier&nbsp;DeFoy -InterDigital<br class=3D""><br class=3D"">#03: =
=E2=80=9CGeneralized Market/Service Verticals with Network Slicing =
Use&nbsp;cases=E2=80=9D- presenter: K. Makhijani- Huawei<br class=3D""><br=
 class=3D"">#04: =E2=80=9CAn ICN service delivery prototype using =
slices=E2=80=9D - presenter: Ravi&nbsp;Ravindran - Huawei<br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">III. Towards Operators =
Ecosystem Viewpoints<br class=3D""><br class=3D"">#05: =E2=80=9CNetwork =
Slicing architecture=E2=80=9D- presenter: Liang Geng =E2=80=93 =
China&nbsp;Mobile<br class=3D""><br class=3D"">#06: =E2=80=9CNetwork =
Slicing: Technical Viewpoints and Functional Roles=E2=80=9D- =
presenter:&nbsp;Pedro Martinez-Julia =E2=80=93 NICT Japan<br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">III. Towards Manufactures =
Viewpoints<br class=3D""><br class=3D"">#07: =E2=80=9CHow to slice =
Network Slicing for the IETF=E2=80=9D - presenter: H.&nbsp;Flinck - =
Nokia<br class=3D""><br class=3D"">#08: =E2=80=9CACTN Virtual Network =
operation (with Network Slicing&nbsp;Insights)=E2=80=9D - presenter: G. =
Grammel - Juniper<br class=3D""><br class=3D"">#09: =E2=80=9CAutomatic =
Network Slicing Management for Transport Network=E2=80=9D- =
presenter:&nbsp;Qiang Li - Huawei<br class=3D""><br class=3D"">#10: =
=E2=80=9CForwarding Path &amp; Signaling Management=E2=80=9D- presenter: =
S.&nbsp;Matsushima- SoftBank<br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">IV. Final Q&amp;A &amp; Conclusions: 30 mins<br class=3D""><br =
class=3D"">All slides from the NS meeting are at:<span =
class=3D"Apple-converted-space">&nbsp;</span><a =
href=3D"https://github.com/netslices/IETF-" style=3D"color: purple; =
text-decoration: underline;" =
class=3D"">https://github.com/netslices/IETF-</a>NetSlices/tree/master/IET=
F98_Sidemeeting023.<o:p class=3D""></o:p></p></div><div class=3D""><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">3.&nbsp; &nbsp;&nbsp;&nbsp;The presenters =
have identified&nbsp;a significant number of problem areas to be =
addressed at IETF&nbsp;in particular:<br class=3D""><br class=3D"">19 =
problem areas identified in&nbsp;#01<br class=3D""><br class=3D"">7 =
problem areas identified in&nbsp;#02<br class=3D""><br class=3D"">4 =
problem areas identified in&nbsp;#03<br class=3D""><br class=3D"">4 =
problem areas identified in&nbsp;#04<br class=3D""><br class=3D"">9 =
problem areas identified in&nbsp;#05<br class=3D""><br class=3D"">8 =
problem areas identified in&nbsp;#06<br class=3D""><br class=3D"">7 =
problem areas identified in&nbsp;#07<br class=3D""><br class=3D"">7 =
problem areas identified in&nbsp;#09<br class=3D""><br class=3D"">10 =
problem areas identified in&nbsp;#10<br class=3D""><br =
class=3D"">&nbsp;<br class=3D"">4.&nbsp; &nbsp;&nbsp;&nbsp;Descriptive =
and/or prescriptive&nbsp;definitions for Network Slices were provided =
in&nbsp;#01,&nbsp;#05,&nbsp;#06,&nbsp;#07,&nbsp;#08<br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">5.&nbsp; =
&nbsp;&nbsp;&nbsp;Based on the audience response&nbsp;the following =
actions are recommended:<br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">=E2=80=A2 Action1: a WG forming BoF will be&nbsp;requested at =
the next IETF99 ( unanimous request)<br class=3D"">&nbsp;<br =
class=3D"">=E2=80=A2 Action2: approx 40 member of the =
audience&nbsp;showed their interest to contribute in the next 3 months =
to<br class=3D""><br class=3D"">=E2=80=93&nbsp; &nbsp; &nbsp;&nbsp;use =
cases,<br class=3D""><br class=3D"">=E2=80=93&nbsp; &nbsp; =
&nbsp;&nbsp;problem statements,<br class=3D""><br class=3D"">=E2=80=93&nbs=
p; &nbsp; &nbsp;&nbsp;requirements and architecture<br class=3D""><br =
class=3D"">=E2=80=93&nbsp; &nbsp; &nbsp;&nbsp;Exposure =
Interface&nbsp;specification and data model<br class=3D""><br =
class=3D"">=E2=80=93&nbsp; &nbsp; &nbsp;&nbsp;Efficient slice isolation =
with&nbsp;guarantees for isolation<br class=3D"">&nbsp;<br class=3D"">=E2=80=
=A2 Action 3: Unanimous request to review and&nbsp;consolidate a =
descriptive and prescriptive definition of NS<o:p =
class=3D""></o:p></div></div><div class=3D""><div style=3D"margin: 0in =
0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman', serif;" =
class=3D""><br class=3D"">=E2=80=A2 Action 4: A draft charter as =
problem&nbsp;statement for WG activities that would include:<br =
class=3D""><br class=3D"">&nbsp;- the&nbsp;description of the =
standardisation methods / algorithms within the scope of&nbsp;IETF and =
the related documents ( NS definition, reference models,&nbsp;use cases, =
etc.)<br class=3D""><br class=3D"">&nbsp;- a concrete&nbsp;work plan for =
2 years<br class=3D""><br class=3D"">This charter be edited with =
contributions&nbsp;from the NS members of the mailing list and made =
available at&nbsp;<a href=3D"https://github.com/netslices/IETF-NetSlices" =
style=3D"color: purple; text-decoration: underline;" =
class=3D"">https://github.com/netslices/IETF-NetSlices</a><br =
class=3D""><br class=3D""><br class=3D"">Thank you for all presenters =
and&nbsp;participants to the meeting which generated significant =
discussion and&nbsp;interest.<br class=3D"">&nbsp;<br class=3D"">Please =
add any further notes and/or further minutes for this&nbsp;NS =
side&nbsp;meeting<br class=3D""><br class=3D""><br class=3D"">Best =
Regards<br class=3D""><br class=3D"">Alex<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<br class=3D""><br =
class=3D"">&nbsp;<br class=3D""><br class=3D"">&nbsp;<o:p =
class=3D""></o:p></div></div></div></div></blockquote></div><div =
style=3D"margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times =
New Roman', serif;" class=3D"">&nbsp;<o:p =
class=3D""></o:p></div></div></div></div></blockquote></div><br =
class=3D""></div></div></body></html>=

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From: "Kiran.Makhijani" <Kiran.Makhijani@huawei.com>
To: "Sprecher, Nurit (Nokia - IL/Kfar Sava)" <nurit.sprecher@nokia.com>, "philip.eardley@bt.com" <philip.eardley@bt.com>, "galis.alex@gmail.com" <galis.alex@gmail.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>
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Thread-Topic: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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To: Leeyoung <leeyoung@huawei.com>, Lou Berger <lberger@labn.net>, "Igor Bryskin" <Igor.Bryskin@huawei.com>, "Belotti, Sergio (Nokia - IT/Vimercate)" <sergio.belotti@nokia.com>, Gert Grammel <ggrammel@juniper.net>, "teas@ietf.org" <teas@ietf.org>, "adrian@olddog.co.uk" <adrian@olddog.co.uk>
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From nobody Thu May 18 05:54:58 2017
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From: "Flinck, Hannu (Nokia - FI/Espoo)" <hannu.flinck@nokia-bell-labs.com>
To: Kiran.Makhijani <Kiran.Makhijani@huawei.com>, "Sprecher, Nurit (Nokia - IL/Kfar Sava)" <nurit.sprecher@nokia.com>, "philip.eardley@bt.com" <philip.eardley@bt.com>, "galis.alex@gmail.com" <galis.alex@gmail.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>
CC: "Andrianov, Anatoly (Nokia - US/Arlington Heights)" <anatoly.andrianov@nokia.com>, "Sartori, Cinzia (Nokia - DE/Munich)" <cinzia.sartori@nokia-bell-labs.com>, "a.galis@ucl.ac.uk" <a.galis@ucl.ac.uk>
Thread-Topic: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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--_000_DB5PR07MB13998E56225406EF31A52F5A9BE40DB5PR07MB1399eurp_--


From nobody Thu May 18 10:59:44 2017
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From: "Kiran.Makhijani" <Kiran.Makhijani@huawei.com>
To: "Flinck, Hannu (Nokia - FI/Espoo)" <hannu.flinck@nokia-bell-labs.com>, "Sprecher, Nurit (Nokia - IL/Kfar Sava)" <nurit.sprecher@nokia.com>, "philip.eardley@bt.com" <philip.eardley@bt.com>, "galis.alex@gmail.com" <galis.alex@gmail.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>
CC: "Andrianov, Anatoly (Nokia - US/Arlington Heights)" <anatoly.andrianov@nokia.com>, "Sartori, Cinzia (Nokia - DE/Munich)" <cinzia.sartori@nokia-bell-labs.com>, "a.galis@ucl.ac.uk" <a.galis@ucl.ac.uk>
Thread-Topic: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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Date: Thu, 18 May 2017 17:52:49 +0000
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Subject: Re: [Netslices] Preparation for a Network Slicing BoF at IETF 99 in Prague
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--_000_B7020C7658D646FFB04EDDE46FCAC81Ahuaweicom_--


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From: Leeyoung <leeyoung@huawei.com>
To: "teas@ietf.org" <teas@ietf.org>
CC: "NetSlices@ietf.org" <NetSlices@ietf.org>
Thread-Topic: [Teas] terminology discussion  network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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Hi,

Lou is right. There is a dedicated email list for the discussion of "networ=
k slicing (cc'ed)" and the discussion about what that term means should be =
held on that list.=20

We have used similar language in draft-ietf-teas-actn-framework right from =
the
00 version. Recent changes have been an attempt to clarify what the termino=
logy means in the context of ACTN. We are not trying to define or redefine =
"network slicing" in the ACTN document, but are trying to make it clear how=
 ACTN works.

Therefore I propose the following resolution:

1. All discussion of the general applicability and definition of "network s=
licing" is held on the netslices mailing list.

2. We adopt Adrian's suggestion to explain that the scope of the definition=
 of the terms used in the ACTN framework is limited to ACTN. That means eff=
ectively that if there are components of a wider definition of network slic=
ing that are not supported by ACTN, that will be OK.=20

I propose to post an updated version in the next few days and I believe tha=
t will allow this draft to move ahead without being blocked by the discussi=
on in netslices. Once the IETF has a stable definition of network slicing w=
e can return and see how ACTN is applicable to that definition an whether m=
ore wok is need (in a separate draft).

Thanks,
Young

-----Original Message-----
From: Lou Berger [mailto:lberger@labn.net]=20
Sent: Tuesday, May 16, 2017 8:35 AM
To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT/Vim=
ercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>; Le=
eyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
Subject: Re: [Teas] terminology discussion network slicing

Perhaps it's time to bring the discussion to the slicing list and report ba=
ck their reaponse....

Lou


On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:

> Hi Sergio,
>
> I would also like to hear more from network slicing experts.
>
> My understanding is that the difference in the separation (in terms of=20
> control and data planes, security, etc.). For example, traditional BGP=20
> based L3 VPNs (that use provider's common control plane for their=20
> management and IP/MPLS TE tunnels to inter-connect their PEs) will=20
> probably not be able guarantee for the clients msec range connectivity=20
> setup times required by 5g, while provided by the same provider fully=20
> separated/genuinely private IP/MPLS networks (that do not share=20
> IP/MPLS control plane and infrastructure, whose network topology is=20
> supported by separate L0/L1 connections) hopefully will be able to=20
> provide such guarantees. Therefore, I define layer network slices as=20
> dynamically managed fully isolated in control and data planes private=20
> TE layer networks, which may share one or more underlying server layer ne=
tworks.
>
>
> Cheers,
> Igor
>
>
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio=20
> (Nokia - IT/Vimercate)
> Sent: Tuesday, May 16, 2017 6:08 AM
> To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Hi Gert,
>
> "Thinking a bit about it I came to the point where "VPN" and "network=20
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?"
>
> I share completely your conclusion , I'd like if someone can explain=20
> if a difference really exists .
>
> Thanks
> Sergio
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
> Sent: Monday, May 15, 2017 7:02 PM
> To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Leeyoung,
>
> Thank you for taking a stab on this. Usually when getting to a=20
> definition, I try to establish what kind of existing constructs would=20
> fall under the definition. If my understanding is correct, the=20
> following list of constructs would all satisfy the definition somehow.
> - A TDM network with a p2p TDM connection
> - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
> - An MPLS LSP using a traffic engineered IP network
> - A L2VPN using a traffic engineered MPLS network
> - A L3VPN using a traffic engineered IP network
> - A TCP connection using a traffic engineered IP network
> - Different QoS classes in an IP network
>
> Thinking a bit about it I came to the point where "VPN" and "network=20
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?
>
> Gert
>
>
> On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"=20
> <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>
>     Hi Adrian and others,
>
>     We'd like cross check with you on some terminology we introduced newl=
y. Any=20
>     comment on these terms will be greatly appreciated.
>
>     We introduced 'network slicing' as follows:
>
>             Network slicing is a collection of resources
>             that are used to establish logically dedicated virtual networ=
ks
>             over TE networks. It allows a network provider to provide
>             dedicated virtual networks for application/customer over a
>             common network infrastructure. The logically dedicated
>             resources are a part of the larger common network
>             infrastructures that are shared among various network slice
>             instances which are the end-to-end realization of network
>             slicing, consisting of the combination of physically or
>             logically dedicated resources.
>
>
>     Thanks.
>     Young and Daniele
>     -----Original Message-----
>     From: Leeyoung
>     Sent: Friday, May 05, 2017 1:41 PM
>     To: teas@ietf.org
>     Subject: RE: [Teas] I-D Action:=20
> draft-ietf-teas-actn-framework-05.txt
>
>     Hi,
>
>     This update is intended to incorporate the comments from the last WG=
=20
>     meeting and any pending issues. We also have taken the global editori=
al=20
>     changes to make it consistent through the document. Major changes are=
:
>
>     - Inclusion of "network slicing" definition from ACTN perspective (in=
 the=20
>     terminology section)
>     - Added virtual network service (VNS) section (Section 3) to define t=
ypes=20
>     of VNS.
>     - Incorporated "orchestration" (service/network) mapping to ACTN=20
>     architecture (See Section 5.2)
>     - Created a new section 6 (Topology Abstraction Method) where we impo=
rted=20
>     some texts from ACTN abstraction method =20
>     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>     - Added Appendices A & B to discuss example deployment scenarios such=
 as=20
>     example of MDSC and PNC functions integrated in Service/Network=20
>     Orchestrator (Appendix A) and example of IP + Optical network with L3=
VPN=20
>     service (Appendix B)
>
>     In regard to ACTN abstraction method draft, we are going to keep it a=
s a=20
>     separate draft and use this document to elaborate other aspects not=20
>     imported to the framework document.
>
>     The following diff pointer will help you see the changes with this re=
vision:
>    =20
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>     The co-authors believe that the document is ready for WG LC. Any=20
>     changes/comments will be appreciated.
>
>     Thanks & Best regards,
>     Young & Daniele (on behalf of other co-authors/contributors)
>
>     -----Original Message-----
>     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-draft=
s@ietf.org
>     Sent: Friday, May 05, 2017 10:41 AM
>     To: i-d-announce@ietf.org
>     Cc: teas@ietf.org
>     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>
>
>     A New Internet-Draft is available from the on-line Internet-Drafts di=
rectories.
>     This draft is a work item of the Traffic Engineering Architecture and=
=20
>     Signaling of the IETF.
>
>             Title           : Framework for Abstraction and Control of Tr=
affic=20
>             Engineered Networks
>             Authors         : Daniele Ceccarelli
>                               Young Lee
>     	Filename        : draft-ietf-teas-actn-framework-05.txt
>     	Pages           : 41
>     	Date            : 2017-05-05
>
>     Abstract:
>        Traffic Engineered networks have a variety of mechanisms to
>        facilitate the separation of the data plane and control plane. The=
y
>        also have a range of management and provisioning protocols to
>        configure and activate network resources.  These mechanisms
>        represent key technologies for enabling flexible and dynamic
>        networking.
>
>        Abstraction of network resources is a technique that can be applie=
d
>        to a single network domain or across multiple domains to create a
>        single virtualized network that is under the control of a network
>        operator or the customer of the operator that actually owns
>        the network resources.
>
>        This document provides a framework for Abstraction and Control of
>        Traffic Engineered Networks (ACTN).
>
>
>
>     The IETF datatracker status page for this draft is:
>     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>
>     There are also htmlized versions available at:
>     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>    =20
> https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
> 5
>
>     A diff from the previous version is available at:
>    =20
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>
>     Please note that it may take a couple of minutes from the time of=20
>     submission until the htmlized version and diff are available at tools=
.ietf.org.
>
>     Internet-Drafts are also available by anonymous FTP at:
>     ftp://ftp.ietf.org/internet-drafts/
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org
>     https://www.ietf.org/mailman/listinfo/teas
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org
>     https://www.ietf.org/mailman/listinfo/teas
>
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>



From nobody Fri May 19 12:18:27 2017
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Reply-To: <adrian@olddog.co.uk>
From: "Adrian Farrel" <adrian@olddog.co.uk>
To: "'Leeyoung'" <leeyoung@huawei.com>, <teas@ietf.org>
Cc: <NetSlices@ietf.org>
References: <7AEB3D6833318045B4AE71C2C87E8E172B2CA60E@SJCEML702-CHM.china.huawei.com> <97EE7243-CB44-40AD-B02D-98E07D9C79F2@juniper.net> <DB3PR07MB0588EA2B00C389E762D8C59F91E60@DB3PR07MB0588.eurprd07.prod.outlook.com> <0C72C38E7EBC34499E8A9E7DD00786390993DBF8@SJCEML702-CHM.china.huawei.com> <15c1177e0c0.27d3.9b4188e636579690ba6c69f2c8a0f1fd@labn.net> <7AEB3D6833318045B4AE71C2C87E8E172B2CC48E@SJCEML702-CHM.china.huawei.com>
In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E172B2CC48E@SJCEML702-CHM.china.huawei.com>
Date: Fri, 19 May 2017 20:17:58 +0100
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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Unsurprisingly, I think that Young's proposal to adopt my text change is a good
idea :-)

I think we can scope the ACTN documents to talk about ACTN only. That means that
the discussion of "network slicing" in the ACTN documents (which goes back to
the time of WG adoption) can and should remain, but should be described in terms
of "within the scope of ACTN".

That means that the netslices list remains the place to discuss the full breadth
of the definition of "network slicing", and also means that the ACTN documents
are not predicated on an external agreement on that wider definition.

Hope that works and we don't have to do a global replace of "network slice" in
the ACTN docs with a new term.

Cheers,
Adrian

> -----Original Message-----
> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Leeyoung
> Sent: 19 May 2017 14:15
> To: teas@ietf.org
> Cc: NetSlices@ietf.org
> Subject: Re: [Netslices] [Teas] terminology discussion network slicing
> 
> Hi,
> 
> Lou is right. There is a dedicated email list for the discussion of "network
slicing
> (cc'ed)" and the discussion about what that term means should be held on that
> list.
> 
> We have used similar language in draft-ietf-teas-actn-framework right from the
> 00 version. Recent changes have been an attempt to clarify what the
terminology
> means in the context of ACTN. We are not trying to define or redefine "network
> slicing" in the ACTN document, but are trying to make it clear how ACTN works.
> 
> Therefore I propose the following resolution:
> 
> 1. All discussion of the general applicability and definition of "network
slicing" is
> held on the netslices mailing list.
> 
> 2. We adopt Adrian's suggestion to explain that the scope of the definition of
the
> terms used in the ACTN framework is limited to ACTN. That means effectively
> that if there are components of a wider definition of network slicing that are
not
> supported by ACTN, that will be OK.
> 
> I propose to post an updated version in the next few days and I believe that
will
> allow this draft to move ahead without being blocked by the discussion in
> netslices. Once the IETF has a stable definition of network slicing we can
return
> and see how ACTN is applicable to that definition an whether more wok is need
> (in a separate draft).
> 
> Thanks,
> Young
> 
> -----Original Message-----
> From: Lou Berger [mailto:lberger@labn.net]
> Sent: Tuesday, May 16, 2017 8:35 AM
> To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia -
> IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel
> <ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org;
> adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
> 
> Perhaps it's time to bring the discussion to the slicing list and report back
their
> reaponse....
> 
> Lou
> 
> 
> On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:
> 
> > Hi Sergio,
> >
> > I would also like to hear more from network slicing experts.
> >
> > My understanding is that the difference in the separation (in terms of
> > control and data planes, security, etc.). For example, traditional BGP
> > based L3 VPNs (that use provider's common control plane for their
> > management and IP/MPLS TE tunnels to inter-connect their PEs) will
> > probably not be able guarantee for the clients msec range connectivity
> > setup times required by 5g, while provided by the same provider fully
> > separated/genuinely private IP/MPLS networks (that do not share
> > IP/MPLS control plane and infrastructure, whose network topology is
> > supported by separate L0/L1 connections) hopefully will be able to
> > provide such guarantees. Therefore, I define layer network slices as
> > dynamically managed fully isolated in control and data planes private
> > TE layer networks, which may share one or more underlying server layer
> networks.
> >
> >
> > Cheers,
> > Igor
> >
> >
> >
> >
> > -----Original Message-----
> > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio
> > (Nokia - IT/Vimercate)
> > Sent: Tuesday, May 16, 2017 6:08 AM
> > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
> > Subject: Re: [Teas] terminology discussion network slicing
> >
> > Hi Gert,
> >
> > "Thinking a bit about it I came to the point where "VPN" and "network
> > slices" seem to describe the same entity or at least a "network slice"
> > being a VPN of VPNs?"
> >
> > I share completely your conclusion , I'd like if someone can explain
> > if a difference really exists .
> >
> > Thanks
> > Sergio
> >
> >
> > -----Original Message-----
> > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
> > Sent: Monday, May 15, 2017 7:02 PM
> > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
> > Subject: Re: [Teas] terminology discussion network slicing
> >
> > Leeyoung,
> >
> > Thank you for taking a stab on this. Usually when getting to a
> > definition, I try to establish what kind of existing constructs would
> > fall under the definition. If my understanding is correct, the
> > following list of constructs would all satisfy the definition somehow.
> > - A TDM network with a p2p TDM connection
> > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
> > - An MPLS LSP using a traffic engineered IP network
> > - A L2VPN using a traffic engineered MPLS network
> > - A L3VPN using a traffic engineered IP network
> > - A TCP connection using a traffic engineered IP network
> > - Different QoS classes in an IP network
> >
> > Thinking a bit about it I came to the point where "VPN" and "network
> > slices" seem to describe the same entity or at least a "network slice"
> > being a VPN of VPNs?
> >
> > Gert
> >
> >
> > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
> > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
> >
> >     Hi Adrian and others,
> >
> >     We'd like cross check with you on some terminology we introduced newly.
> Any
> >     comment on these terms will be greatly appreciated.
> >
> >     We introduced 'network slicing' as follows:
> >
> >             Network slicing is a collection of resources
> >             that are used to establish logically dedicated virtual networks
> >             over TE networks. It allows a network provider to provide
> >             dedicated virtual networks for application/customer over a
> >             common network infrastructure. The logically dedicated
> >             resources are a part of the larger common network
> >             infrastructures that are shared among various network slice
> >             instances which are the end-to-end realization of network
> >             slicing, consisting of the combination of physically or
> >             logically dedicated resources.
> >
> >
> >     Thanks.
> >     Young and Daniele
> >     -----Original Message-----
> >     From: Leeyoung
> >     Sent: Friday, May 05, 2017 1:41 PM
> >     To: teas@ietf.org
> >     Subject: RE: [Teas] I-D Action:
> > draft-ietf-teas-actn-framework-05.txt
> >
> >     Hi,
> >
> >     This update is intended to incorporate the comments from the last WG
> >     meeting and any pending issues. We also have taken the global editorial
> >     changes to make it consistent through the document. Major changes are:
> >
> >     - Inclusion of "network slicing" definition from ACTN perspective (in
the
> >     terminology section)
> >     - Added virtual network service (VNS) section (Section 3) to define
types
> >     of VNS.
> >     - Incorporated "orchestration" (service/network) mapping to ACTN
> >     architecture (See Section 5.2)
> >     - Created a new section 6 (Topology Abstraction Method) where we
> imported
> >     some texts from ACTN abstraction method
> >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
> >     - Added Appendices A & B to discuss example deployment scenarios such as
> >     example of MDSC and PNC functions integrated in Service/Network
> >     Orchestrator (Appendix A) and example of IP + Optical network with L3VPN
> >     service (Appendix B)
> >
> >     In regard to ACTN abstraction method draft, we are going to keep it as a
> >     separate draft and use this document to elaborate other aspects not
> >     imported to the framework document.
> >
> >     The following diff pointer will help you see the changes with this
revision:
> >
> > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
> >
> >     The co-authors believe that the document is ready for WG LC. Any
> >     changes/comments will be appreciated.
> >
> >     Thanks & Best regards,
> >     Young & Daniele (on behalf of other co-authors/contributors)
> >
> >     -----Original Message-----
> >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-
> drafts@ietf.org
> >     Sent: Friday, May 05, 2017 10:41 AM
> >     To: i-d-announce@ietf.org
> >     Cc: teas@ietf.org
> >     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
> >
> >
> >     A New Internet-Draft is available from the on-line Internet-Drafts
directories.
> >     This draft is a work item of the Traffic Engineering Architecture and
> >     Signaling of the IETF.
> >
> >             Title           : Framework for Abstraction and Control of
Traffic
> >             Engineered Networks
> >             Authors         : Daniele Ceccarelli
> >                               Young Lee
> >     	Filename        : draft-ietf-teas-actn-framework-05.txt
> >     	Pages           : 41
> >     	Date            : 2017-05-05
> >
> >     Abstract:
> >        Traffic Engineered networks have a variety of mechanisms to
> >        facilitate the separation of the data plane and control plane. They
> >        also have a range of management and provisioning protocols to
> >        configure and activate network resources.  These mechanisms
> >        represent key technologies for enabling flexible and dynamic
> >        networking.
> >
> >        Abstraction of network resources is a technique that can be applied
> >        to a single network domain or across multiple domains to create a
> >        single virtualized network that is under the control of a network
> >        operator or the customer of the operator that actually owns
> >        the network resources.
> >
> >        This document provides a framework for Abstraction and Control of
> >        Traffic Engineered Networks (ACTN).
> >
> >
> >
> >     The IETF datatracker status page for this draft is:
> >     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
> >
> >     There are also htmlized versions available at:
> >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
> >
> > https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
> > 5
> >
> >     A diff from the previous version is available at:
> >
> > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
> >
> >
> >     Please note that it may take a couple of minutes from the time of
> >     submission until the htmlized version and diff are available at
tools.ietf.org.
> >
> >     Internet-Drafts are also available by anonymous FTP at:
> >     ftp://ftp.ietf.org/internet-drafts/
> >
> >     _______________________________________________
> >     Teas mailing list
> >     Teas@ietf.org
> >     https://www.ietf.org/mailman/listinfo/teas
> >
> >     _______________________________________________
> >     Teas mailing list
> >     Teas@ietf.org
> >     https://www.ietf.org/mailman/listinfo/teas
> >
> >
> > _______________________________________________
> > Teas mailing list
> > Teas@ietf.org
> > https://www.ietf.org/mailman/listinfo/teas
> >
> > _______________________________________________
> > Teas mailing list
> > Teas@ietf.org
> > https://www.ietf.org/mailman/listinfo/teas
> >
> > _______________________________________________
> > Teas mailing list
> > Teas@ietf.org
> > https://www.ietf.org/mailman/listinfo/teas
> >
> 
> 
> _______________________________________________
> Netslices mailing list
> Netslices@ietf.org
> https://www.ietf.org/mailman/listinfo/netslices


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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
CC: "NetSlices@ietf.org" <NetSlices@ietf.org>
Thread-Topic: [Teas] terminology discussion  network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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Hi Young, all,

i agree with your conclusion but would like to clarify one thing that IMO g=
ot lost in the discussion since its beginning.

The 3GPP definition says:=20
"A set of network functions and the resources for these network functions w=
hich are arranged and configured, forming a complete logical network to mee=
t certain network characteristics."

This means that a network slice IS NOT a VPN or a TE Tunnel.
A network slice is "something" (netslices and 3GPP will define what this so=
mething is) that is composed by a "piece" in the RADIO domain, a "piece" in=
 the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other p=
ieces in possible other domains.

The word "transport" can be misleading here since one could think of transp=
ort technologies (e.g. WDM, OTN), but what I'm referring to as TRANSPORT DO=
MAIN is that part of the network that is used to carry a packet between two=
 other domains.=20
In order to have a slice, that portion of the transport domain needs to be =
engineered, hence it is all about building a TE entity and stitching servic=
es to such entity. This is what is in the ACTN scope.

My very personal opinion is that whatever belongs to the transport domain b=
elongs to IETF (and is already being addressed), while the rest is a danger=
ous duplication of concepts standardized is other SDOs...but this is anothe=
r discussion that doesn't fit here.

BR
Daniele =20


-----Original Message-----
From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 19 maggio 2017 15:15
To: teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Teas] terminology discussion network slicing

Hi,

Lou is right. There is a dedicated email list for the discussion of "networ=
k slicing (cc'ed)" and the discussion about what that term means should be =
held on that list.=20

We have used similar language in draft-ietf-teas-actn-framework right from =
the
00 version. Recent changes have been an attempt to clarify what the termino=
logy means in the context of ACTN. We are not trying to define or redefine =
"network slicing" in the ACTN document, but are trying to make it clear how=
 ACTN works.

Therefore I propose the following resolution:

1. All discussion of the general applicability and definition of "network s=
licing" is held on the netslices mailing list.

2. We adopt Adrian's suggestion to explain that the scope of the definition=
 of the terms used in the ACTN framework is limited to ACTN. That means eff=
ectively that if there are components of a wider definition of network slic=
ing that are not supported by ACTN, that will be OK.=20

I propose to post an updated version in the next few days and I believe tha=
t will allow this draft to move ahead without being blocked by the discussi=
on in netslices. Once the IETF has a stable definition of network slicing w=
e can return and see how ACTN is applicable to that definition an whether m=
ore wok is need (in a separate draft).

Thanks,
Young

-----Original Message-----
From: Lou Berger [mailto:lberger@labn.net]
Sent: Tuesday, May 16, 2017 8:35 AM
To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT/Vim=
ercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>; Le=
eyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
Subject: Re: [Teas] terminology discussion network slicing

Perhaps it's time to bring the discussion to the slicing list and report ba=
ck their reaponse....

Lou


On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:

> Hi Sergio,
>
> I would also like to hear more from network slicing experts.
>
> My understanding is that the difference in the separation (in terms of=20
> control and data planes, security, etc.). For example, traditional BGP=20
> based L3 VPNs (that use provider's common control plane for their=20
> management and IP/MPLS TE tunnels to inter-connect their PEs) will=20
> probably not be able guarantee for the clients msec range connectivity=20
> setup times required by 5g, while provided by the same provider fully=20
> separated/genuinely private IP/MPLS networks (that do not share=20
> IP/MPLS control plane and infrastructure, whose network topology is=20
> supported by separate L0/L1 connections) hopefully will be able to=20
> provide such guarantees. Therefore, I define layer network slices as=20
> dynamically managed fully isolated in control and data planes private=20
> TE layer networks, which may share one or more underlying server layer ne=
tworks.
>
>
> Cheers,
> Igor
>
>
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio=20
> (Nokia - IT/Vimercate)
> Sent: Tuesday, May 16, 2017 6:08 AM
> To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Hi Gert,
>
> "Thinking a bit about it I came to the point where "VPN" and "network=20
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?"
>
> I share completely your conclusion , I'd like if someone can explain=20
> if a difference really exists .
>
> Thanks
> Sergio
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
> Sent: Monday, May 15, 2017 7:02 PM
> To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Leeyoung,
>
> Thank you for taking a stab on this. Usually when getting to a=20
> definition, I try to establish what kind of existing constructs would=20
> fall under the definition. If my understanding is correct, the=20
> following list of constructs would all satisfy the definition somehow.
> - A TDM network with a p2p TDM connection
> - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
> - An MPLS LSP using a traffic engineered IP network
> - A L2VPN using a traffic engineered MPLS network
> - A L3VPN using a traffic engineered IP network
> - A TCP connection using a traffic engineered IP network
> - Different QoS classes in an IP network
>
> Thinking a bit about it I came to the point where "VPN" and "network=20
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?
>
> Gert
>
>
> On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"=20
> <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>
>     Hi Adrian and others,
>
>     We'd like cross check with you on some terminology we introduced newl=
y. Any=20
>     comment on these terms will be greatly appreciated.
>
>     We introduced 'network slicing' as follows:
>
>             Network slicing is a collection of resources
>             that are used to establish logically dedicated virtual networ=
ks
>             over TE networks. It allows a network provider to provide
>             dedicated virtual networks for application/customer over a
>             common network infrastructure. The logically dedicated
>             resources are a part of the larger common network
>             infrastructures that are shared among various network slice
>             instances which are the end-to-end realization of network
>             slicing, consisting of the combination of physically or
>             logically dedicated resources.
>
>
>     Thanks.
>     Young and Daniele
>     -----Original Message-----
>     From: Leeyoung
>     Sent: Friday, May 05, 2017 1:41 PM
>     To: teas@ietf.org
>     Subject: RE: [Teas] I-D Action:=20
> draft-ietf-teas-actn-framework-05.txt
>
>     Hi,
>
>     This update is intended to incorporate the comments from the last WG=
=20
>     meeting and any pending issues. We also have taken the global editori=
al=20
>     changes to make it consistent through the document. Major changes are=
:
>
>     - Inclusion of "network slicing" definition from ACTN perspective (in=
 the=20
>     terminology section)
>     - Added virtual network service (VNS) section (Section 3) to define t=
ypes=20
>     of VNS.
>     - Incorporated "orchestration" (service/network) mapping to ACTN=20
>     architecture (See Section 5.2)
>     - Created a new section 6 (Topology Abstraction Method) where we impo=
rted=20
>     some texts from ACTN abstraction method =20
>     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>     - Added Appendices A & B to discuss example deployment scenarios such=
 as=20
>     example of MDSC and PNC functions integrated in Service/Network=20
>     Orchestrator (Appendix A) and example of IP + Optical network with L3=
VPN=20
>     service (Appendix B)
>
>     In regard to ACTN abstraction method draft, we are going to keep it a=
s a=20
>     separate draft and use this document to elaborate other aspects not=20
>     imported to the framework document.
>
>     The following diff pointer will help you see the changes with this re=
vision:
>    =20
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>     The co-authors believe that the document is ready for WG LC. Any=20
>     changes/comments will be appreciated.
>
>     Thanks & Best regards,
>     Young & Daniele (on behalf of other co-authors/contributors)
>
>     -----Original Message-----
>     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-draft=
s@ietf.org
>     Sent: Friday, May 05, 2017 10:41 AM
>     To: i-d-announce@ietf.org
>     Cc: teas@ietf.org
>     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>
>
>     A New Internet-Draft is available from the on-line Internet-Drafts di=
rectories.
>     This draft is a work item of the Traffic Engineering Architecture and=
=20
>     Signaling of the IETF.
>
>             Title           : Framework for Abstraction and Control of Tr=
affic=20
>             Engineered Networks
>             Authors         : Daniele Ceccarelli
>                               Young Lee
>     	Filename        : draft-ietf-teas-actn-framework-05.txt
>     	Pages           : 41
>     	Date            : 2017-05-05
>
>     Abstract:
>        Traffic Engineered networks have a variety of mechanisms to
>        facilitate the separation of the data plane and control plane. The=
y
>        also have a range of management and provisioning protocols to
>        configure and activate network resources.  These mechanisms
>        represent key technologies for enabling flexible and dynamic
>        networking.
>
>        Abstraction of network resources is a technique that can be applie=
d
>        to a single network domain or across multiple domains to create a
>        single virtualized network that is under the control of a network
>        operator or the customer of the operator that actually owns
>        the network resources.
>
>        This document provides a framework for Abstraction and Control of
>        Traffic Engineered Networks (ACTN).
>
>
>
>     The IETF datatracker status page for this draft is:
>     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>
>     There are also htmlized versions available at:
>     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>    =20
> https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
> 5
>
>     A diff from the previous version is available at:
>    =20
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>
>     Please note that it may take a couple of minutes from the time of=20
>     submission until the htmlized version and diff are available at tools=
.ietf.org.
>
>     Internet-Drafts are also available by anonymous FTP at:
>     ftp://ftp.ietf.org/internet-drafts/
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org
>     https://www.ietf.org/mailman/listinfo/teas
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org
>     https://www.ietf.org/mailman/listinfo/teas
>
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
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> https://www.ietf.org/mailman/listinfo/teas
>


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From: Igor Bryskin <Igor.Bryskin@huawei.com>
To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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Hi Danielle,

Network slicing may have nothing to do with radio. 5g is just a big reason =
as to why the interest/focus is back on network slicing, which is a very ol=
d concept. I don't think that anyone is arguing with what you wrote. The qu=
estions are:
a) how do you manage these "pieces"?
b) what policy infrastructure should be put in place?
c) how do you ensure their separation or, conversely, the degree of resourc=
e sharing?
d) why exactly legacy VPNs are not good enough?

Cheers,
Igor


 =20

-----Original Message-----
From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
Sent: Friday, May 19, 2017 4:19 PM
To: Leeyoung; teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Teas] terminology discussion network slicing

Hi Young, all,

i agree with your conclusion but would like to clarify one thing that IMO g=
ot lost in the discussion since its beginning.

The 3GPP definition says:=20
"A set of network functions and the resources for these network functions w=
hich are arranged and configured, forming a complete logical network to mee=
t certain network characteristics."

This means that a network slice IS NOT a VPN or a TE Tunnel.
A network slice is "something" (netslices and 3GPP will define what this so=
mething is) that is composed by a "piece" in the RADIO domain, a "piece" in=
 the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other p=
ieces in possible other domains.

The word "transport" can be misleading here since one could think of transp=
ort technologies (e.g. WDM, OTN), but what I'm referring to as TRANSPORT DO=
MAIN is that part of the network that is used to carry a packet between two=
 other domains.=20
In order to have a slice, that portion of the transport domain needs to be =
engineered, hence it is all about building a TE entity and stitching servic=
es to such entity. This is what is in the ACTN scope.

My very personal opinion is that whatever belongs to the transport domain b=
elongs to IETF (and is already being addressed), while the rest is a danger=
ous duplication of concepts standardized is other SDOs...but this is anothe=
r discussion that doesn't fit here.

BR
Daniele =20


-----Original Message-----
From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 19 maggio 2017 15:15
To: teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Teas] terminology discussion network slicing

Hi,

Lou is right. There is a dedicated email list for the discussion of "networ=
k slicing (cc'ed)" and the discussion about what that term means should be =
held on that list.=20

We have used similar language in draft-ietf-teas-actn-framework right from =
the
00 version. Recent changes have been an attempt to clarify what the termino=
logy means in the context of ACTN. We are not trying to define or redefine =
"network slicing" in the ACTN document, but are trying to make it clear how=
 ACTN works.

Therefore I propose the following resolution:

1. All discussion of the general applicability and definition of "network s=
licing" is held on the netslices mailing list.

2. We adopt Adrian's suggestion to explain that the scope of the definition=
 of the terms used in the ACTN framework is limited to ACTN. That means eff=
ectively that if there are components of a wider definition of network slic=
ing that are not supported by ACTN, that will be OK.=20

I propose to post an updated version in the next few days and I believe tha=
t will allow this draft to move ahead without being blocked by the discussi=
on in netslices. Once the IETF has a stable definition of network slicing w=
e can return and see how ACTN is applicable to that definition an whether m=
ore wok is need (in a separate draft).

Thanks,
Young

-----Original Message-----
From: Lou Berger [mailto:lberger@labn.net]
Sent: Tuesday, May 16, 2017 8:35 AM
To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT/Vim=
ercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>; Le=
eyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
Subject: Re: [Teas] terminology discussion network slicing

Perhaps it's time to bring the discussion to the slicing list and report ba=
ck their reaponse....

Lou


On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:

> Hi Sergio,
>
> I would also like to hear more from network slicing experts.
>
> My understanding is that the difference in the separation (in terms of=20
> control and data planes, security, etc.). For example, traditional BGP=20
> based L3 VPNs (that use provider's common control plane for their=20
> management and IP/MPLS TE tunnels to inter-connect their PEs) will=20
> probably not be able guarantee for the clients msec range connectivity=20
> setup times required by 5g, while provided by the same provider fully=20
> separated/genuinely private IP/MPLS networks (that do not share=20
> IP/MPLS control plane and infrastructure, whose network topology is=20
> supported by separate L0/L1 connections) hopefully will be able to=20
> provide such guarantees. Therefore, I define layer network slices as=20
> dynamically managed fully isolated in control and data planes private=20
> TE layer networks, which may share one or more underlying server layer ne=
tworks.
>
>
> Cheers,
> Igor
>
>
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio=20
> (Nokia - IT/Vimercate)
> Sent: Tuesday, May 16, 2017 6:08 AM
> To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Hi Gert,
>
> "Thinking a bit about it I came to the point where "VPN" and "network=20
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?"
>
> I share completely your conclusion , I'd like if someone can explain=20
> if a difference really exists .
>
> Thanks
> Sergio
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
> Sent: Monday, May 15, 2017 7:02 PM
> To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Leeyoung,
>
> Thank you for taking a stab on this. Usually when getting to a=20
> definition, I try to establish what kind of existing constructs would=20
> fall under the definition. If my understanding is correct, the=20
> following list of constructs would all satisfy the definition somehow.
> - A TDM network with a p2p TDM connection
> - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
> - An MPLS LSP using a traffic engineered IP network
> - A L2VPN using a traffic engineered MPLS network
> - A L3VPN using a traffic engineered IP network
> - A TCP connection using a traffic engineered IP network
> - Different QoS classes in an IP network
>
> Thinking a bit about it I came to the point where "VPN" and "network=20
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?
>
> Gert
>
>
> On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"=20
> <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>
>     Hi Adrian and others,
>
>     We'd like cross check with you on some terminology we introduced newl=
y. Any=20
>     comment on these terms will be greatly appreciated.
>
>     We introduced 'network slicing' as follows:
>
>             Network slicing is a collection of resources
>             that are used to establish logically dedicated virtual networ=
ks
>             over TE networks. It allows a network provider to provide
>             dedicated virtual networks for application/customer over a
>             common network infrastructure. The logically dedicated
>             resources are a part of the larger common network
>             infrastructures that are shared among various network slice
>             instances which are the end-to-end realization of network
>             slicing, consisting of the combination of physically or
>             logically dedicated resources.
>
>
>     Thanks.
>     Young and Daniele
>     -----Original Message-----
>     From: Leeyoung
>     Sent: Friday, May 05, 2017 1:41 PM
>     To: teas@ietf.org
>     Subject: RE: [Teas] I-D Action:=20
> draft-ietf-teas-actn-framework-05.txt
>
>     Hi,
>
>     This update is intended to incorporate the comments from the last WG=
=20
>     meeting and any pending issues. We also have taken the global editori=
al=20
>     changes to make it consistent through the document. Major changes are=
:
>
>     - Inclusion of "network slicing" definition from ACTN perspective (in=
 the=20
>     terminology section)
>     - Added virtual network service (VNS) section (Section 3) to define t=
ypes=20
>     of VNS.
>     - Incorporated "orchestration" (service/network) mapping to ACTN=20
>     architecture (See Section 5.2)
>     - Created a new section 6 (Topology Abstraction Method) where we impo=
rted=20
>     some texts from ACTN abstraction method =20
>     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>     - Added Appendices A & B to discuss example deployment scenarios such=
 as=20
>     example of MDSC and PNC functions integrated in Service/Network=20
>     Orchestrator (Appendix A) and example of IP + Optical network with L3=
VPN=20
>     service (Appendix B)
>
>     In regard to ACTN abstraction method draft, we are going to keep it a=
s a=20
>     separate draft and use this document to elaborate other aspects not=20
>     imported to the framework document.
>
>     The following diff pointer will help you see the changes with this re=
vision:
>    =20
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>     The co-authors believe that the document is ready for WG LC. Any=20
>     changes/comments will be appreciated.
>
>     Thanks & Best regards,
>     Young & Daniele (on behalf of other co-authors/contributors)
>
>     -----Original Message-----
>     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-draft=
s@ietf.org
>     Sent: Friday, May 05, 2017 10:41 AM
>     To: i-d-announce@ietf.org
>     Cc: teas@ietf.org
>     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>
>
>     A New Internet-Draft is available from the on-line Internet-Drafts di=
rectories.
>     This draft is a work item of the Traffic Engineering Architecture and=
=20
>     Signaling of the IETF.
>
>             Title           : Framework for Abstraction and Control of Tr=
affic=20
>             Engineered Networks
>             Authors         : Daniele Ceccarelli
>                               Young Lee
>     	Filename        : draft-ietf-teas-actn-framework-05.txt
>     	Pages           : 41
>     	Date            : 2017-05-05
>
>     Abstract:
>        Traffic Engineered networks have a variety of mechanisms to
>        facilitate the separation of the data plane and control plane. The=
y
>        also have a range of management and provisioning protocols to
>        configure and activate network resources.  These mechanisms
>        represent key technologies for enabling flexible and dynamic
>        networking.
>
>        Abstraction of network resources is a technique that can be applie=
d
>        to a single network domain or across multiple domains to create a
>        single virtualized network that is under the control of a network
>        operator or the customer of the operator that actually owns
>        the network resources.
>
>        This document provides a framework for Abstraction and Control of
>        Traffic Engineered Networks (ACTN).
>
>
>
>     The IETF datatracker status page for this draft is:
>     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>
>     There are also htmlized versions available at:
>     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>    =20
> https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
> 5
>
>     A diff from the previous version is available at:
>    =20
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>
>     Please note that it may take a couple of minutes from the time of=20
>     submission until the htmlized version and diff are available at tools=
.ietf.org.
>
>     Internet-Drafts are also available by anonymous FTP at:
>     ftp://ftp.ietf.org/internet-drafts/
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org
>     https://www.ietf.org/mailman/listinfo/teas
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org
>     https://www.ietf.org/mailman/listinfo/teas
>
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>


_______________________________________________
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--001a1143196681bc24054fe9c792
Content-Type: text/plain; charset="UTF-8"

On May 19, 2017 16:56, "Daniele Ceccarelli" <daniele.ceccarelli@ericsson.com>
wrote:

Hi Young, all,

i agree with your conclusion but would like to clarify one thing that IMO
got lost in the discussion since its beginning.

The 3GPP definition says:
"A set of network functions and the resources for these network functions
which are arranged and configured, forming a complete logical network to
meet certain network characteristics."

This means that a network slice IS NOT a VPN or a TE Tunnel.
A network slice is "something" (netslices and 3GPP will define what this
something is) that is composed by a "piece" in the RADIO domain, a "piece"
in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other
pieces in possible other domains.

The word "transport" can be misleading here since one could think of
transport technologies (e.g. WDM, OTN), but what I'm referring to as
TRANSPORT DOMAIN is that part of the network that is used to carry a packet
between two other domains.
In order to have a slice, that portion of the transport domain needs to be
engineered, hence it is all about building a TE entity and stitching
services to such entity. This is what is in the ACTN scope.

My very personal opinion is that whatever belongs to the transport domain
belongs to IETF (and is already being addressed), while the rest is a
dangerous duplication of concepts standardized is other SDOs...but this is
another discussion that doesn't fit here.


Given that "transport" has two completely orthogonal meanings in our
community now, and is already a source of confusion, if this term is not
already etched in stone, if you could think of another label, that would be
awesome.

Just from your description, I thought you're describing a transit operator.
I'm not saying that's the right term, but I think it would confuse fewer
people.

If you can think of a better term, please use it, of course.

Spencer, as *Transport* AD, but not the kind of Transport you're looking
for ...

--001a1143196681bc24054fe9c792
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto"><br><div class=3D"gmail_extra" dir=3D"auto"><br><div clas=
s=3D"gmail_quote">On May 19, 2017 16:56, &quot;Daniele Ceccarelli&quot; &lt=
;<a href=3D"mailto:daniele.ceccarelli@ericsson.com">daniele.ceccarelli@eric=
sson.com</a>&gt; wrote:<br type=3D"attribution"><blockquote class=3D"quote"=
 style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi=
 Young, all,<br>
<br>
i agree with your conclusion but would like to clarify one thing that IMO g=
ot lost in the discussion since its beginning.<br>
<br>
The 3GPP definition says:<br>
&quot;A set of network functions and the resources for these network functi=
ons which are arranged and configured, forming a complete logical network t=
o meet certain network characteristics.&quot;<br>
<br>
This means that a network slice IS NOT a VPN or a TE Tunnel.<br>
A network slice is &quot;something&quot; (netslices and 3GPP will define wh=
at this something is) that is composed by a &quot;piece&quot; in the RADIO =
domain, a &quot;piece&quot; in the CLOUD domain, a &quot;piece&quot; in the=
 TRANSPORT domain, plus possible other pieces in possible other domains.<br=
>
<br>
The word &quot;transport&quot; can be misleading here since one could think=
 of transport technologies (e.g. WDM, OTN), but what I&#39;m referring to a=
s TRANSPORT DOMAIN is that part of the network that is used to carry a pack=
et between two other domains.<br>
In order to have a slice, that portion of the transport domain needs to be =
engineered, hence it is all about building a TE entity and stitching servic=
es to such entity. This is what is in the ACTN scope.<br>
<br>
My very personal opinion is that whatever belongs to the transport domain b=
elongs to IETF (and is already being addressed), while the rest is a danger=
ous duplication of concepts standardized is other SDOs...but this is anothe=
r discussion that doesn&#39;t fit here.<br></blockquote></div></div><div di=
r=3D"auto"><br></div><div dir=3D"auto">Given that &quot;transport&quot; has=
 two completely orthogonal meanings in our community now, and is already a =
source of confusion, if this term is not already etched in stone, if you co=
uld think of another label, that would be awesome.</div><div dir=3D"auto"><=
br></div><div dir=3D"auto">Just from your description, I thought you&#39;re=
 describing a transit operator. I&#39;m not saying that&#39;s the right ter=
m, but I think it would confuse fewer people.</div><div dir=3D"auto"><br></=
div><div dir=3D"auto">If you can think of a better term, please use it, of =
course.</div><div dir=3D"auto"><br></div><div dir=3D"auto">Spencer, as *Tra=
nsport* AD, but not the kind of Transport you&#39;re looking for ...</div><=
div class=3D"gmail_extra" dir=3D"auto"><div class=3D"gmail_quote"><blockquo=
te class=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;pa=
dding-left:1ex"></blockquote></div></div></div>

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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Sat, 20 May 2017 12:13:50 +0800
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To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
Cc: Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>,  "NetSlices@ietf.org" <NetSlices@ietf.org>
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Hi Daniele,
I think that my interpretation of network slice construct definition by
3GPP is slightly different. Please find my comments in-line tagged GIM>>.
Some are to do with terminology but, I believe, it is helpful to settle the
dictionary and agree on the interpretation of terms.

Regards,
Greg

On Sat, May 20, 2017 at 4:18 AM, Daniele Ceccarelli <
daniele.ceccarelli@ericsson.com> wrote:

> Hi Young, all,
>
> i agree with your conclusion but would like to clarify one thing that IMO
> got lost in the discussion since its beginning.
>
> The 3GPP definition says:
> "A set of network functions and the resources for these network functions
> which are arranged and configured, forming a complete logical network to
> meet certain network characteristics."
>
> This means that a network slice IS NOT a VPN or a TE Tunnel.
>
GIM>> My view is that VPN or a TE Tunnel could be part of instantiation of
a network slice. There likely to be additional to TE parameters that may be
considered, depending on the profile of the service requested the NS.


> A network slice is "something" (netslices and 3GPP will define what this
> something is) that is composed by a "piece" in the RADIO domain, a "piece=
"
> in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible oth=
er
> pieces in possible other domains.
>
GIM>> I see separation of RAN and "transport" networks. Indeed, there will
be e2e construct (will it be still referred as "network slice" or
"multi-domain NS") but it can be decomposed into domain-scope NSes. What
you referred to as "piece" I consider as domain-scope NS.

>
> The word "transport" can be misleading here since one could think of
> transport technologies (e.g. WDM, OTN), but what I'm referring to as
> TRANSPORT DOMAIN is that part of the network that is used to carry a pack=
et
> between two other domains.
> In order to have a slice, that portion of the transport domain needs to b=
e
> engineered, hence it is all about building a TE entity and stitching
> services to such entity. This is what is in the ACTN scope.
>
GIM>> Should we use Client-Server terms?

>
> My very personal opinion is that whatever belongs to the transport domain
> belongs to IETF (and is already being addressed), while the rest is a
> dangerous duplication of concepts standardized is other SDOs...but this i=
s
> another discussion that doesn't fit here.
>
> BR
> Daniele
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
> Sent: venerd=C3=AC 19 maggio 2017 15:15
> To: teas@ietf.org
> Cc: NetSlices@ietf.org
> Subject: Re: [Teas] terminology discussion network slicing
>
> Hi,
>
> Lou is right. There is a dedicated email list for the discussion of
> "network slicing (cc'ed)" and the discussion about what that term means
> should be held on that list.
>
> We have used similar language in draft-ietf-teas-actn-framework right fro=
m
> the
> 00 version. Recent changes have been an attempt to clarify what the
> terminology means in the context of ACTN. We are not trying to define or
> redefine "network slicing" in the ACTN document, but are trying to make i=
t
> clear how ACTN works.
>
> Therefore I propose the following resolution:
>
> 1. All discussion of the general applicability and definition of "network
> slicing" is held on the netslices mailing list.
>
> 2. We adopt Adrian's suggestion to explain that the scope of the
> definition of the terms used in the ACTN framework is limited to ACTN. Th=
at
> means effectively that if there are components of a wider definition of
> network slicing that are not supported by ACTN, that will be OK.
>
> I propose to post an updated version in the next few days and I believe
> that will allow this draft to move ahead without being blocked by the
> discussion in netslices. Once the IETF has a stable definition of network
> slicing we can return and see how ACTN is applicable to that definition a=
n
> whether more wok is need (in a separate draft).
>
> Thanks,
> Young
>
> -----Original Message-----
> From: Lou Berger [mailto:lberger@labn.net]
> Sent: Tuesday, May 16, 2017 8:35 AM
> To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia -
> IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel <
> ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org;
> adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Perhaps it's time to bring the discussion to the slicing list and report
> back their reaponse....
>
> Lou
>
>
> On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:
>
> > Hi Sergio,
> >
> > I would also like to hear more from network slicing experts.
> >
> > My understanding is that the difference in the separation (in terms of
> > control and data planes, security, etc.). For example, traditional BGP
> > based L3 VPNs (that use provider's common control plane for their
> > management and IP/MPLS TE tunnels to inter-connect their PEs) will
> > probably not be able guarantee for the clients msec range connectivity
> > setup times required by 5g, while provided by the same provider fully
> > separated/genuinely private IP/MPLS networks (that do not share
> > IP/MPLS control plane and infrastructure, whose network topology is
> > supported by separate L0/L1 connections) hopefully will be able to
> > provide such guarantees. Therefore, I define layer network slices as
> > dynamically managed fully isolated in control and data planes private
> > TE layer networks, which may share one or more underlying server layer
> networks.
> >
> >
> > Cheers,
> > Igor
> >
> >
> >
> >
> > -----Original Message-----
> > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio
> > (Nokia - IT/Vimercate)
> > Sent: Tuesday, May 16, 2017 6:08 AM
> > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
> > Subject: Re: [Teas] terminology discussion network slicing
> >
> > Hi Gert,
> >
> > "Thinking a bit about it I came to the point where "VPN" and "network
> > slices" seem to describe the same entity or at least a "network slice"
> > being a VPN of VPNs?"
> >
> > I share completely your conclusion , I'd like if someone can explain
> > if a difference really exists .
> >
> > Thanks
> > Sergio
> >
> >
> > -----Original Message-----
> > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
> > Sent: Monday, May 15, 2017 7:02 PM
> > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
> > Subject: Re: [Teas] terminology discussion network slicing
> >
> > Leeyoung,
> >
> > Thank you for taking a stab on this. Usually when getting to a
> > definition, I try to establish what kind of existing constructs would
> > fall under the definition. If my understanding is correct, the
> > following list of constructs would all satisfy the definition somehow.
> > - A TDM network with a p2p TDM connection
> > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
> > - An MPLS LSP using a traffic engineered IP network
> > - A L2VPN using a traffic engineered MPLS network
> > - A L3VPN using a traffic engineered IP network
> > - A TCP connection using a traffic engineered IP network
> > - Different QoS classes in an IP network
> >
> > Thinking a bit about it I came to the point where "VPN" and "network
> > slices" seem to describe the same entity or at least a "network slice"
> > being a VPN of VPNs?
> >
> > Gert
> >
> >
> > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
> > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
> >
> >     Hi Adrian and others,
> >
> >     We'd like cross check with you on some terminology we introduced
> newly. Any
> >     comment on these terms will be greatly appreciated.
> >
> >     We introduced 'network slicing' as follows:
> >
> >             Network slicing is a collection of resources
> >             that are used to establish logically dedicated virtual
> networks
> >             over TE networks. It allows a network provider to provide
> >             dedicated virtual networks for application/customer over a
> >             common network infrastructure. The logically dedicated
> >             resources are a part of the larger common network
> >             infrastructures that are shared among various network slice
> >             instances which are the end-to-end realization of network
> >             slicing, consisting of the combination of physically or
> >             logically dedicated resources.
> >
> >
> >     Thanks.
> >     Young and Daniele
> >     -----Original Message-----
> >     From: Leeyoung
> >     Sent: Friday, May 05, 2017 1:41 PM
> >     To: teas@ietf.org
> >     Subject: RE: [Teas] I-D Action:
> > draft-ietf-teas-actn-framework-05.txt
> >
> >     Hi,
> >
> >     This update is intended to incorporate the comments from the last W=
G
> >     meeting and any pending issues. We also have taken the global
> editorial
> >     changes to make it consistent through the document. Major changes
> are:
> >
> >     - Inclusion of "network slicing" definition from ACTN perspective
> (in the
> >     terminology section)
> >     - Added virtual network service (VNS) section (Section 3) to define
> types
> >     of VNS.
> >     - Incorporated "orchestration" (service/network) mapping to ACTN
> >     architecture (See Section 5.2)
> >     - Created a new section 6 (Topology Abstraction Method) where we
> imported
> >     some texts from ACTN abstraction method
> >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
> >     - Added Appendices A & B to discuss example deployment scenarios
> such as
> >     example of MDSC and PNC functions integrated in Service/Network
> >     Orchestrator (Appendix A) and example of IP + Optical network with
> L3VPN
> >     service (Appendix B)
> >
> >     In regard to ACTN abstraction method draft, we are going to keep it
> as a
> >     separate draft and use this document to elaborate other aspects not
> >     imported to the framework document.
> >
> >     The following diff pointer will help you see the changes with this
> revision:
> >
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
> >
> >     The co-authors believe that the document is ready for WG LC. Any
> >     changes/comments will be appreciated.
> >
> >     Thanks & Best regards,
> >     Young & Daniele (on behalf of other co-authors/contributors)
> >
> >     -----Original Message-----
> >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> >     Sent: Friday, May 05, 2017 10:41 AM
> >     To: i-d-announce@ietf.org
> >     Cc: teas@ietf.org
> >     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
> >
> >
> >     A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> >     This draft is a work item of the Traffic Engineering Architecture a=
nd
> >     Signaling of the IETF.
> >
> >             Title           : Framework for Abstraction and Control of
> Traffic
> >             Engineered Networks
> >             Authors         : Daniele Ceccarelli
> >                               Young Lee
> >       Filename        : draft-ietf-teas-actn-framework-05.txt
> >       Pages           : 41
> >       Date            : 2017-05-05
> >
> >     Abstract:
> >        Traffic Engineered networks have a variety of mechanisms to
> >        facilitate the separation of the data plane and control plane.
> They
> >        also have a range of management and provisioning protocols to
> >        configure and activate network resources.  These mechanisms
> >        represent key technologies for enabling flexible and dynamic
> >        networking.
> >
> >        Abstraction of network resources is a technique that can be
> applied
> >        to a single network domain or across multiple domains to create =
a
> >        single virtualized network that is under the control of a networ=
k
> >        operator or the customer of the operator that actually owns
> >        the network resources.
> >
> >        This document provides a framework for Abstraction and Control o=
f
> >        Traffic Engineered Networks (ACTN).
> >
> >
> >
> >     The IETF datatracker status page for this draft is:
> >     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
> >
> >     There are also htmlized versions available at:
> >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
> >
> > https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
> > 5
> >
> >     A diff from the previous version is available at:
> >
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
> >
> >
> >     Please note that it may take a couple of minutes from the time of
> >     submission until the htmlized version and diff are available at
> tools.ietf.org.
> >
> >     Internet-Drafts are also available by anonymous FTP at:
> >     ftp://ftp.ietf.org/internet-drafts/
> >
> >     _______________________________________________
> >     Teas mailing list
> >     Teas@ietf.org
> >     https://www.ietf.org/mailman/listinfo/teas
> >
> >     _______________________________________________
> >     Teas mailing list
> >     Teas@ietf.org
> >     https://www.ietf.org/mailman/listinfo/teas
> >
> >
> > _______________________________________________
> > Teas mailing list
> > Teas@ietf.org
> > https://www.ietf.org/mailman/listinfo/teas
> >
> > _______________________________________________
> > Teas mailing list
> > Teas@ietf.org
> > https://www.ietf.org/mailman/listinfo/teas
> >
> > _______________________________________________
> > Teas mailing list
> > Teas@ietf.org
> > https://www.ietf.org/mailman/listinfo/teas
> >
>
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
> Netslices mailing list
> Netslices@ietf.org
> https://www.ietf.org/mailman/listinfo/netslices
>

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<div dir=3D"ltr">Hi Daniele,<div>I think that my interpretation of network =
slice construct definition by 3GPP is slightly different. Please find my co=
mments in-line tagged GIM&gt;&gt;. Some are to do with terminology but, I b=
elieve, it is helpful to settle the dictionary and agree on the interpretat=
ion of terms.</div><div><br></div><div>Regards,</div><div>Greg</div><div cl=
ass=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sat, May 20, 2017 at =
4:18 AM, Daniele Ceccarelli <span dir=3D"ltr">&lt;<a href=3D"mailto:daniele=
.ceccarelli@ericsson.com" target=3D"_blank">daniele.ceccarelli@ericsson.com=
</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Young, all,<br>
<br>
i agree with your conclusion but would like to clarify one thing that IMO g=
ot lost in the discussion since its beginning.<br>
<br>
The 3GPP definition says:<br>
&quot;A set of network functions and the resources for these network functi=
ons which are arranged and configured, forming a complete logical network t=
o meet certain network characteristics.&quot;<br>
<br>
This means that a network slice IS NOT a VPN or a TE Tunnel.<br></blockquot=
e><div>GIM&gt;&gt; My view is that VPN or a TE Tunnel could be part of inst=
antiation of a network slice. There likely to be additional to TE parameter=
s that may be considered, depending on the profile of the service requested=
 the NS.</div><div>=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"m=
argin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
A network slice is &quot;something&quot; (netslices and 3GPP will define wh=
at this something is) that is composed by a &quot;piece&quot; in the RADIO =
domain, a &quot;piece&quot; in the CLOUD domain, a &quot;piece&quot; in the=
 TRANSPORT domain, plus possible other pieces in possible other domains.<br=
></blockquote><div>GIM&gt;&gt; I see separation of RAN and &quot;transport&=
quot; networks. Indeed, there will be e2e construct (will it be still refer=
red as &quot;network slice&quot; or &quot;multi-domain NS&quot;) but it can=
 be decomposed into domain-scope NSes. What you referred to as &quot;piece&=
quot; I consider as domain-scope NS.</div><blockquote class=3D"gmail_quote"=
 style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>
The word &quot;transport&quot; can be misleading here since one could think=
 of transport technologies (e.g. WDM, OTN), but what I&#39;m referring to a=
s TRANSPORT DOMAIN is that part of the network that is used to carry a pack=
et between two other domains.<br>
In order to have a slice, that portion of the transport domain needs to be =
engineered, hence it is all about building a TE entity and stitching servic=
es to such entity. This is what is in the ACTN scope.<br></blockquote><div>=
GIM&gt;&gt; Should we use Client-Server terms?=C2=A0</div><blockquote class=
=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padd=
ing-left:1ex">
<br>
My very personal opinion is that whatever belongs to the transport domain b=
elongs to IETF (and is already being addressed), while the rest is a danger=
ous duplication of concepts standardized is other SDOs...but this is anothe=
r discussion that doesn&#39;t fit here.<br>
<br>
BR<br>
<span class=3D"HOEnZb"><font color=3D"#888888">Daniele<br>
</font></span><span class=3D"im HOEnZb"><br>
<br>
-----Original Message-----<br>
From: Teas [mailto:<a href=3D"mailto:teas-bounces@ietf.org">teas-bounces@ie=
tf.org</a>] On Behalf Of Leeyoung<br>
Sent: venerd=C3=AC 19 maggio 2017 15:15<br>
To: <a href=3D"mailto:teas@ietf.org">teas@ietf.org</a><br>
Cc: <a href=3D"mailto:NetSlices@ietf.org">NetSlices@ietf.org</a><br>
</span><div class=3D"HOEnZb"><div class=3D"h5">Subject: Re: [Teas] terminol=
ogy discussion network slicing<br>
<br>
Hi,<br>
<br>
Lou is right. There is a dedicated email list for the discussion of &quot;n=
etwork slicing (cc&#39;ed)&quot; and the discussion about what that term me=
ans should be held on that list.<br>
<br>
We have used similar language in draft-ietf-teas-actn-framework right from =
the<br>
00 version. Recent changes have been an attempt to clarify what the termino=
logy means in the context of ACTN. We are not trying to define or redefine =
&quot;network slicing&quot; in the ACTN document, but are trying to make it=
 clear how ACTN works.<br>
<br>
Therefore I propose the following resolution:<br>
<br>
1. All discussion of the general applicability and definition of &quot;netw=
ork slicing&quot; is held on the netslices mailing list.<br>
<br>
2. We adopt Adrian&#39;s suggestion to explain that the scope of the defini=
tion of the terms used in the ACTN framework is limited to ACTN. That means=
 effectively that if there are components of a wider definition of network =
slicing that are not supported by ACTN, that will be OK.<br>
<br>
I propose to post an updated version in the next few days and I believe tha=
t will allow this draft to move ahead without being blocked by the discussi=
on in netslices. Once the IETF has a stable definition of network slicing w=
e can return and see how ACTN is applicable to that definition an whether m=
ore wok is need (in a separate draft).<br>
<br>
Thanks,<br>
Young<br>
<br>
-----Original Message-----<br>
From: Lou Berger [mailto:<a href=3D"mailto:lberger@labn.net">lberger@labn.n=
et</a>]<br>
Sent: Tuesday, May 16, 2017 8:35 AM<br>
To: Igor Bryskin &lt;<a href=3D"mailto:Igor.Bryskin@huawei.com">Igor.Bryski=
n@huawei.com</a>&gt;; Belotti, Sergio (Nokia - IT/Vimercate) &lt;<a href=3D=
"mailto:sergio.belotti@nokia.com">sergio.belotti@nokia.com</a>&gt;; Gert Gr=
ammel &lt;<a href=3D"mailto:ggrammel@juniper.net">ggrammel@juniper.net</a>&=
gt;; Leeyoung &lt;<a href=3D"mailto:leeyoung@huawei.com">leeyoung@huawei.co=
m</a>&gt;; <a href=3D"mailto:teas@ietf.org">teas@ietf.org</a>; <a href=3D"m=
ailto:adrian@olddog.co.uk">adrian@olddog.co.uk</a><br>
Subject: Re: [Teas] terminology discussion network slicing<br>
<br>
Perhaps it&#39;s time to bring the discussion to the slicing list and repor=
t back their reaponse....<br>
<br>
Lou<br>
<br>
<br>
On May 16, 2017 8:31:19 AM Igor Bryskin &lt;<a href=3D"mailto:Igor.Bryskin@=
huawei.com">Igor.Bryskin@huawei.com</a>&gt; wrote:<br>
<br>
&gt; Hi Sergio,<br>
&gt;<br>
&gt; I would also like to hear more from network slicing experts.<br>
&gt;<br>
&gt; My understanding is that the difference in the separation (in terms of=
<br>
&gt; control and data planes, security, etc.). For example, traditional BGP=
<br>
&gt; based L3 VPNs (that use provider&#39;s common control plane for their<=
br>
&gt; management and IP/MPLS TE tunnels to inter-connect their PEs) will<br>
&gt; probably not be able guarantee for the clients msec range connectivity=
<br>
&gt; setup times required by 5g, while provided by the same provider fully<=
br>
&gt; separated/genuinely private IP/MPLS networks (that do not share<br>
&gt; IP/MPLS control plane and infrastructure, whose network topology is<br=
>
&gt; supported by separate L0/L1 connections) hopefully will be able to<br>
&gt; provide such guarantees. Therefore, I define layer network slices as<b=
r>
&gt; dynamically managed fully isolated in control and data planes private<=
br>
&gt; TE layer networks, which may share one or more underlying server layer=
 networks.<br>
&gt;<br>
&gt;<br>
&gt; Cheers,<br>
&gt; Igor<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt; -----Original Message-----<br>
&gt; From: Teas [mailto:<a href=3D"mailto:teas-bounces@ietf.org">teas-bounc=
es@ietf.org</a>] On Behalf Of Belotti, Sergio<br>
&gt; (Nokia - IT/Vimercate)<br>
&gt; Sent: Tuesday, May 16, 2017 6:08 AM<br>
&gt; To: Gert Grammel; Leeyoung; <a href=3D"mailto:teas@ietf.org">teas@ietf=
.org</a>; <a href=3D"mailto:adrian@olddog.co.uk">adrian@olddog.co.uk</a><br=
>
&gt; Subject: Re: [Teas] terminology discussion network slicing<br>
&gt;<br>
&gt; Hi Gert,<br>
&gt;<br>
&gt; &quot;Thinking a bit about it I came to the point where &quot;VPN&quot=
; and &quot;network<br>
&gt; slices&quot; seem to describe the same entity or at least a &quot;netw=
ork slice&quot;<br>
&gt; being a VPN of VPNs?&quot;<br>
&gt;<br>
&gt; I share completely your conclusion , I&#39;d like if someone can expla=
in<br>
&gt; if a difference really exists .<br>
&gt;<br>
&gt; Thanks<br>
&gt; Sergio<br>
&gt;<br>
&gt;<br>
&gt; -----Original Message-----<br>
&gt; From: Teas [mailto:<a href=3D"mailto:teas-bounces@ietf.org">teas-bounc=
es@ietf.org</a>] On Behalf Of Gert Grammel<br>
&gt; Sent: Monday, May 15, 2017 7:02 PM<br>
&gt; To: Leeyoung &lt;<a href=3D"mailto:leeyoung@huawei.com">leeyoung@huawe=
i.com</a>&gt;; <a href=3D"mailto:teas@ietf.org">teas@ietf.org</a>; <a href=
=3D"mailto:adrian@olddog.co.uk">adrian@olddog.co.uk</a><br>
&gt; Subject: Re: [Teas] terminology discussion network slicing<br>
&gt;<br>
&gt; Leeyoung,<br>
&gt;<br>
&gt; Thank you for taking a stab on this. Usually when getting to a<br>
&gt; definition, I try to establish what kind of existing constructs would<=
br>
&gt; fall under the definition. If my understanding is correct, the<br>
&gt; following list of constructs would all satisfy the definition somehow.=
<br>
&gt; - A TDM network with a p2p TDM connection<br>
&gt; - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)<br>
&gt; - An MPLS LSP using a traffic engineered IP network<br>
&gt; - A L2VPN using a traffic engineered MPLS network<br>
&gt; - A L3VPN using a traffic engineered IP network<br>
&gt; - A TCP connection using a traffic engineered IP network<br>
&gt; - Different QoS classes in an IP network<br>
&gt;<br>
&gt; Thinking a bit about it I came to the point where &quot;VPN&quot; and =
&quot;network<br>
&gt; slices&quot; seem to describe the same entity or at least a &quot;netw=
ork slice&quot;<br>
&gt; being a VPN of VPNs?<br>
&gt;<br>
&gt; Gert<br>
&gt;<br>
&gt;<br>
&gt; On 2017-05-17, 16:44, &quot;Teas on behalf of Leeyoung&quot;<br>
&gt; &lt;<a href=3D"mailto:teas-bounces@ietf.org">teas-bounces@ietf.org</a>=
 on behalf of <a href=3D"mailto:leeyoung@huawei.com">leeyoung@huawei.com</a=
>&gt; wrote:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Hi Adrian and others,<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0We&#39;d like cross check with you on some terminol=
ogy we introduced newly. Any<br>
&gt;=C2=A0 =C2=A0 =C2=A0comment on these terms will be greatly appreciated.=
<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0We introduced &#39;network slicing&#39; as follows:=
<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Network slicing is a co=
llection of resources<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that are used to establ=
ish logically dedicated virtual networks<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0over TE networks. It al=
lows a network provider to provide<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0dedicated virtual netwo=
rks for application/customer over a<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0common network infrastr=
ucture. The logically dedicated<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0resources are a part of=
 the larger common network<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0infrastructures that ar=
e shared among various network slice<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0instances which are the=
 end-to-end realization of network<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0slicing, consisting of =
the combination of physically or<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0logically dedicated res=
ources.<br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Thanks.<br>
&gt;=C2=A0 =C2=A0 =C2=A0Young and Daniele<br>
&gt;=C2=A0 =C2=A0 =C2=A0-----Original Message-----<br>
&gt;=C2=A0 =C2=A0 =C2=A0From: Leeyoung<br>
&gt;=C2=A0 =C2=A0 =C2=A0Sent: Friday, May 05, 2017 1:41 PM<br>
&gt;=C2=A0 =C2=A0 =C2=A0To: <a href=3D"mailto:teas@ietf.org">teas@ietf.org<=
/a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Subject: RE: [Teas] I-D Action:<br>
&gt; draft-ietf-teas-actn-<wbr>framework-05.txt<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Hi,<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0This update is intended to incorporate the comments=
 from the last WG<br>
&gt;=C2=A0 =C2=A0 =C2=A0meeting and any pending issues. We also have taken =
the global editorial<br>
&gt;=C2=A0 =C2=A0 =C2=A0changes to make it consistent through the document.=
 Major changes are:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Inclusion of &quot;network slicing&quot; definiti=
on from ACTN perspective (in the<br>
&gt;=C2=A0 =C2=A0 =C2=A0terminology section)<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Added virtual network service (VNS) section (Sect=
ion 3) to define types<br>
&gt;=C2=A0 =C2=A0 =C2=A0of VNS.<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Incorporated &quot;orchestration&quot; (service/n=
etwork) mapping to ACTN<br>
&gt;=C2=A0 =C2=A0 =C2=A0architecture (See Section 5.2)<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Created a new section 6 (Topology Abstraction Met=
hod) where we imported<br>
&gt;=C2=A0 =C2=A0 =C2=A0some texts from ACTN abstraction method<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/draft-lee-te=
as-actn-abstraction-01" rel=3D"noreferrer" target=3D"_blank">https://tools.=
ietf.org/html/<wbr>draft-lee-teas-actn-<wbr>abstraction-01</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0- Added Appendices A &amp; B to discuss example dep=
loyment scenarios such as<br>
&gt;=C2=A0 =C2=A0 =C2=A0example of MDSC and PNC functions integrated in Ser=
vice/Network<br>
&gt;=C2=A0 =C2=A0 =C2=A0Orchestrator (Appendix A) and example of IP + Optic=
al network with L3VPN<br>
&gt;=C2=A0 =C2=A0 =C2=A0service (Appendix B)<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0In regard to ACTN abstraction method draft, we are =
going to keep it as a<br>
&gt;=C2=A0 =C2=A0 =C2=A0separate draft and use this document to elaborate o=
ther aspects not<br>
&gt;=C2=A0 =C2=A0 =C2=A0imported to the framework document.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The following diff pointer will help you see the ch=
anges with this revision:<br>
&gt;<br>
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-fr=
amework-05" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdi=
ff?<wbr>url2=3Ddraft-ietf-teas-actn-<wbr>framework-05</a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The co-authors believe that the document is ready f=
or WG LC. Any<br>
&gt;=C2=A0 =C2=A0 =C2=A0changes/comments will be appreciated.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Thanks &amp; Best regards,<br>
&gt;=C2=A0 =C2=A0 =C2=A0Young &amp; Daniele (on behalf of other co-authors/=
contributors)<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0-----Original Message-----<br>
&gt;=C2=A0 =C2=A0 =C2=A0From: Teas [mailto:<a href=3D"mailto:teas-bounces@i=
etf.org">teas-bounces@ietf.org</a>] On Behalf Of <a href=3D"mailto:internet=
-drafts@ietf.org">internet-drafts@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Sent: Friday, May 05, 2017 10:41 AM<br>
&gt;=C2=A0 =C2=A0 =C2=A0To: <a href=3D"mailto:i-d-announce@ietf.org">i-d-an=
nounce@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Cc: <a href=3D"mailto:teas@ietf.org">teas@ietf.org<=
/a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Subject: [Teas] I-D Action: draft-ietf-teas-actn-<w=
br>framework-05.txt<br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0A New Internet-Draft is available from the on-line =
Internet-Drafts directories.<br>
&gt;=C2=A0 =C2=A0 =C2=A0This draft is a work item of the Traffic Engineerin=
g Architecture and<br>
&gt;=C2=A0 =C2=A0 =C2=A0Signaling of the IETF.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Title=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0: Framework for Abstraction and Control of Traffic<=
br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Engineered Networks<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Authors=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0: Daniele Ceccarelli<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Young Lee<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-=
ietf-teas-actn-<wbr>framework-05.txt<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0: 41<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 : 2017-05-05<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Abstract:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Traffic Engineered networks have a variety =
of mechanisms to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 facilitate the separation of the data plane=
 and control plane. They<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 also have a range of management and provisi=
oning protocols to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 configure and activate network resources.=
=C2=A0 These mechanisms<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 represent key technologies for enabling fle=
xible and dynamic<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 networking.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Abstraction of network resources is a techn=
ique that can be applied<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 to a single network domain or across multip=
le domains to create a<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 single virtualized network that is under th=
e control of a network<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 operator or the customer of the operator th=
at actually owns<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 the network resources.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 This document provides a framework for Abst=
raction and Control of<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Traffic Engineered Networks (ACTN).<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The IETF datatracker status page for this draft is:=
<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.ietf.org/doc/draft-i=
etf-teas-actn-framework/" rel=3D"noreferrer" target=3D"_blank">https://data=
tracker.ietf.org/<wbr>doc/draft-ietf-teas-actn-<wbr>framework/</a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0There are also htmlized versions available at:<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/draft-ietf-t=
eas-actn-framework-05" rel=3D"noreferrer" target=3D"_blank">https://tools.i=
etf.org/html/<wbr>draft-ietf-teas-actn-<wbr>framework-05</a><br>
&gt;<br>
&gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-=
framework-0" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.=
org/<wbr>doc/html/draft-ietf-teas-actn-<wbr>framework-0</a><br>
&gt; 5<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0A diff from the previous version is available at:<b=
r>
&gt;<br>
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-fr=
amework-05" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdi=
ff?<wbr>url2=3Ddraft-ietf-teas-actn-<wbr>framework-05</a><br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Please note that it may take a couple of minutes fr=
om the time of<br>
&gt;=C2=A0 =C2=A0 =C2=A0submission until the htmlized version and diff are =
available at <a href=3D"http://tools.ietf.org" rel=3D"noreferrer" target=3D=
"_blank">tools.ietf.org</a>.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Internet-Drafts are also available by anonymous FTP=
 at:<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=
=3D"noreferrer" target=3D"_blank">ftp://ftp.ietf.org/internet-<wbr>drafts/<=
/a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0______________________________<wbr>________________=
_<br>
&gt;=C2=A0 =C2=A0 =C2=A0Teas mailing list<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"mailto:Teas@ietf.org">Teas@ietf.org</a><=
br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.org/mailman/listinfo/te=
as" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mailman/<wbr>=
listinfo/teas</a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0______________________________<wbr>________________=
_<br>
&gt;=C2=A0 =C2=A0 =C2=A0Teas mailing list<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"mailto:Teas@ietf.org">Teas@ietf.org</a><=
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From: Jeff Tantsura <jefftant.ietf@gmail.com>
Date: Sat, 20 May 2017 06:21:17 +0000
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To: Greg Mirsky <gregimirsky@gmail.com>,  Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
Cc: Leeyoung <leeyoung@huawei.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>,  "teas@ietf.org" <teas@ietf.org>
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Hi,

1. Resources assigned to a slice are not necessarily virtual
2.An LSP that is used to provide transport for a service (eg L2/L3 VPN)is
not necessarily TE, and that doesn't make a VPN any less a VPN
3.Slice LS management is not done by IETF, YANG data modeling work is
crucial to provide level of abstraction needed in
multi-domain/multi-technology environment.

In general, from ACTN prospective it is nothing different than resource
allocation that meets constrains as requested by business logic.

Jari and myself have done 5G/slicing introduction to IAB during this week
retreat and planning to follow up with the work in that area.

Cheers,
Jeff
On Fri, May 19, 2017 at 21:14 Greg Mirsky <gregimirsky@gmail.com> wrote:

> Hi Daniele,
> I think that my interpretation of network slice construct definition by
> 3GPP is slightly different. Please find my comments in-line tagged GIM>>.
> Some are to do with terminology but, I believe, it is helpful to settle t=
he
> dictionary and agree on the interpretation of terms.
>
> Regards,
> Greg
>
> On Sat, May 20, 2017 at 4:18 AM, Daniele Ceccarelli <
> daniele.ceccarelli@ericsson.com> wrote:
>
>> Hi Young, all,
>>
>> i agree with your conclusion but would like to clarify one thing that IM=
O
>> got lost in the discussion since its beginning.
>>
>> The 3GPP definition says:
>> "A set of network functions and the resources for these network function=
s
>> which are arranged and configured, forming a complete logical network to
>> meet certain network characteristics."
>>
>> This means that a network slice IS NOT a VPN or a TE Tunnel.
>>
> GIM>> My view is that VPN or a TE Tunnel could be part of instantiation o=
f
> a network slice. There likely to be additional to TE parameters that may =
be
> considered, depending on the profile of the service requested the NS.
>
>
>> A network slice is "something" (netslices and 3GPP will define what this
>> something is) that is composed by a "piece" in the RADIO domain, a "piec=
e"
>> in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible ot=
her
>> pieces in possible other domains.
>>
> GIM>> I see separation of RAN and "transport" networks. Indeed, there wil=
l
> be e2e construct (will it be still referred as "network slice" or
> "multi-domain NS") but it can be decomposed into domain-scope NSes. What
> you referred to as "piece" I consider as domain-scope NS.
>
>>
>> The word "transport" can be misleading here since one could think of
>> transport technologies (e.g. WDM, OTN), but what I'm referring to as
>> TRANSPORT DOMAIN is that part of the network that is used to carry a pac=
ket
>> between two other domains.
>> In order to have a slice, that portion of the transport domain needs to
>> be engineered, hence it is all about building a TE entity and stitching
>> services to such entity. This is what is in the ACTN scope.
>>
> GIM>> Should we use Client-Server terms?
>
>>
>> My very personal opinion is that whatever belongs to the transport domai=
n
>> belongs to IETF (and is already being addressed), while the rest is a
>> dangerous duplication of concepts standardized is other SDOs...but this =
is
>> another discussion that doesn't fit here.
>>
>> BR
>> Daniele
>>
>>
>> -----Original Message-----
>> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
>> Sent: venerd=C3=AC 19 maggio 2017 15:15
>> To: teas@ietf.org
>> Cc: NetSlices@ietf.org
>>
> Subject: Re: [Teas] terminology discussion network slicing
>>
>> Hi,
>>
>> Lou is right. There is a dedicated email list for the discussion of
>> "network slicing (cc'ed)" and the discussion about what that term means
>> should be held on that list.
>>
>> We have used similar language in draft-ietf-teas-actn-framework right
>> from the
>> 00 version. Recent changes have been an attempt to clarify what the
>> terminology means in the context of ACTN. We are not trying to define or
>> redefine "network slicing" in the ACTN document, but are trying to make =
it
>> clear how ACTN works.
>>
>> Therefore I propose the following resolution:
>>
>> 1. All discussion of the general applicability and definition of "networ=
k
>> slicing" is held on the netslices mailing list.
>>
>> 2. We adopt Adrian's suggestion to explain that the scope of the
>> definition of the terms used in the ACTN framework is limited to ACTN. T=
hat
>> means effectively that if there are components of a wider definition of
>> network slicing that are not supported by ACTN, that will be OK.
>>
>> I propose to post an updated version in the next few days and I believe
>> that will allow this draft to move ahead without being blocked by the
>> discussion in netslices. Once the IETF has a stable definition of networ=
k
>> slicing we can return and see how ACTN is applicable to that definition =
an
>> whether more wok is need (in a separate draft).
>>
>> Thanks,
>> Young
>>
>> -----Original Message-----
>> From: Lou Berger [mailto:lberger@labn.net]
>> Sent: Tuesday, May 16, 2017 8:35 AM
>> To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia -
>> IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel <
>> ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org;
>> adrian@olddog.co.uk
>> Subject: Re: [Teas] terminology discussion network slicing
>>
>> Perhaps it's time to bring the discussion to the slicing list and report
>> back their reaponse....
>>
>> Lou
>>
>>
>> On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:
>>
>> > Hi Sergio,
>> >
>> > I would also like to hear more from network slicing experts.
>> >
>> > My understanding is that the difference in the separation (in terms of
>> > control and data planes, security, etc.). For example, traditional BGP
>> > based L3 VPNs (that use provider's common control plane for their
>> > management and IP/MPLS TE tunnels to inter-connect their PEs) will
>> > probably not be able guarantee for the clients msec range connectivity
>> > setup times required by 5g, while provided by the same provider fully
>> > separated/genuinely private IP/MPLS networks (that do not share
>> > IP/MPLS control plane and infrastructure, whose network topology is
>> > supported by separate L0/L1 connections) hopefully will be able to
>> > provide such guarantees. Therefore, I define layer network slices as
>> > dynamically managed fully isolated in control and data planes private
>> > TE layer networks, which may share one or more underlying server layer
>> networks.
>> >
>> >
>> > Cheers,
>> > Igor
>> >
>> >
>> >
>> >
>> > -----Original Message-----
>> > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio
>> > (Nokia - IT/Vimercate)
>> > Sent: Tuesday, May 16, 2017 6:08 AM
>> > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
>> > Subject: Re: [Teas] terminology discussion network slicing
>> >
>> > Hi Gert,
>> >
>> > "Thinking a bit about it I came to the point where "VPN" and "network
>> > slices" seem to describe the same entity or at least a "network slice"
>> > being a VPN of VPNs?"
>> >
>> > I share completely your conclusion , I'd like if someone can explain
>> > if a difference really exists .
>> >
>> > Thanks
>> > Sergio
>> >
>> >
>> > -----Original Message-----
>> > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>> > Sent: Monday, May 15, 2017 7:02 PM
>> > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>> > Subject: Re: [Teas] terminology discussion network slicing
>> >
>> > Leeyoung,
>> >
>> > Thank you for taking a stab on this. Usually when getting to a
>> > definition, I try to establish what kind of existing constructs would
>> > fall under the definition. If my understanding is correct, the
>> > following list of constructs would all satisfy the definition somehow.
>> > - A TDM network with a p2p TDM connection
>> > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
>> > - An MPLS LSP using a traffic engineered IP network
>> > - A L2VPN using a traffic engineered MPLS network
>> > - A L3VPN using a traffic engineered IP network
>> > - A TCP connection using a traffic engineered IP network
>> > - Different QoS classes in an IP network
>> >
>> > Thinking a bit about it I came to the point where "VPN" and "network
>> > slices" seem to describe the same entity or at least a "network slice"
>> > being a VPN of VPNs?
>> >
>> > Gert
>> >
>> >
>> > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
>> > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>> >
>> >     Hi Adrian and others,
>> >
>> >     We'd like cross check with you on some terminology we introduced
>> newly. Any
>> >     comment on these terms will be greatly appreciated.
>> >
>> >     We introduced 'network slicing' as follows:
>> >
>> >             Network slicing is a collection of resources
>> >             that are used to establish logically dedicated virtual
>> networks
>> >             over TE networks. It allows a network provider to provide
>> >             dedicated virtual networks for application/customer over a
>> >             common network infrastructure. The logically dedicated
>> >             resources are a part of the larger common network
>> >             infrastructures that are shared among various network slic=
e
>> >             instances which are the end-to-end realization of network
>> >             slicing, consisting of the combination of physically or
>> >             logically dedicated resources.
>> >
>> >
>> >     Thanks.
>> >     Young and Daniele
>> >     -----Original Message-----
>> >     From: Leeyoung
>> >     Sent: Friday, May 05, 2017 1:41 PM
>> >     To: teas@ietf.org
>> >     Subject: RE: [Teas] I-D Action:
>> > draft-ietf-teas-actn-framework-05.txt
>> >
>> >     Hi,
>> >
>> >     This update is intended to incorporate the comments from the last =
WG
>> >     meeting and any pending issues. We also have taken the global
>> editorial
>> >     changes to make it consistent through the document. Major changes
>> are:
>> >
>> >     - Inclusion of "network slicing" definition from ACTN perspective
>> (in the
>> >     terminology section)
>> >     - Added virtual network service (VNS) section (Section 3) to defin=
e
>> types
>> >     of VNS.
>> >     - Incorporated "orchestration" (service/network) mapping to ACTN
>> >     architecture (See Section 5.2)
>> >     - Created a new section 6 (Topology Abstraction Method) where we
>> imported
>> >     some texts from ACTN abstraction method
>> >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>> >     - Added Appendices A & B to discuss example deployment scenarios
>> such as
>> >     example of MDSC and PNC functions integrated in Service/Network
>> >     Orchestrator (Appendix A) and example of IP + Optical network with
>> L3VPN
>> >     service (Appendix B)
>> >
>> >     In regard to ACTN abstraction method draft, we are going to keep i=
t
>> as a
>> >     separate draft and use this document to elaborate other aspects no=
t
>> >     imported to the framework document.
>> >
>> >     The following diff pointer will help you see the changes with this
>> revision:
>> >
>> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>> >
>> >     The co-authors believe that the document is ready for WG LC. Any
>> >     changes/comments will be appreciated.
>> >
>> >     Thanks & Best regards,
>> >     Young & Daniele (on behalf of other co-authors/contributors)
>> >
>> >     -----Original Message-----
>> >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of
>> internet-drafts@ietf.org
>> >     Sent: Friday, May 05, 2017 10:41 AM
>> >     To: i-d-announce@ietf.org
>> >     Cc: teas@ietf.org
>> >     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>> >
>> >
>> >     A New Internet-Draft is available from the on-line Internet-Drafts
>> directories.
>> >     This draft is a work item of the Traffic Engineering Architecture
>> and
>> >     Signaling of the IETF.
>> >
>> >             Title           : Framework for Abstraction and Control of
>> Traffic
>> >             Engineered Networks
>> >             Authors         : Daniele Ceccarelli
>> >                               Young Lee
>> >       Filename        : draft-ietf-teas-actn-framework-05.txt
>> >       Pages           : 41
>> >       Date            : 2017-05-05
>> >
>> >     Abstract:
>> >        Traffic Engineered networks have a variety of mechanisms to
>> >        facilitate the separation of the data plane and control plane.
>> They
>> >        also have a range of management and provisioning protocols to
>> >        configure and activate network resources.  These mechanisms
>> >        represent key technologies for enabling flexible and dynamic
>> >        networking.
>> >
>> >        Abstraction of network resources is a technique that can be
>> applied
>> >        to a single network domain or across multiple domains to create=
 a
>> >        single virtualized network that is under the control of a netwo=
rk
>> >        operator or the customer of the operator that actually owns
>> >        the network resources.
>> >
>> >        This document provides a framework for Abstraction and Control =
of
>> >        Traffic Engineered Networks (ACTN).
>> >
>> >
>> >
>> >     The IETF datatracker status page for this draft is:
>> >     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>> >
>> >     There are also htmlized versions available at:
>> >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>> >
>> > https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
>> > 5
>> >
>> >     A diff from the previous version is available at:
>> >
>> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>> >
>> >
>> >     Please note that it may take a couple of minutes from the time of
>> >     submission until the htmlized version and diff are available at
>> tools.ietf.org.
>> >
>> >     Internet-Drafts are also available by anonymous FTP at:
>> >     ftp://ftp.ietf.org/internet-drafts/
>> >
>> >     _______________________________________________
>> >     Teas mailing list
>> >     Teas@ietf.org
>> >     https://www.ietf.org/mailman/listinfo/teas
>> >
>> >     _______________________________________________
>> >     Teas mailing list
>> >     Teas@ietf.org
>> >     https://www.ietf.org/mailman/listinfo/teas
>> >
>> >
>> > _______________________________________________
>> > Teas mailing list
>> > Teas@ietf.org
>> > https://www.ietf.org/mailman/listinfo/teas
>> >
>> > _______________________________________________
>> > Teas mailing list
>> > Teas@ietf.org
>> > https://www.ietf.org/mailman/listinfo/teas
>> >
>> > _______________________________________________
>> > Teas mailing list
>> > Teas@ietf.org
>> > https://www.ietf.org/mailman/listinfo/teas
>> >
>>
>>
>> _______________________________________________
>> Teas mailing list
>> Teas@ietf.org
>> https://www.ietf.org/mailman/listinfo/teas
>>
>> _______________________________________________
>>
> Netslices mailing list
>> Netslices@ietf.org
>> https://www.ietf.org/mailman/listinfo/netslices
>>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>

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Hi,<br><br>1. Resources assigned to a slice are not necessarily virtual<br>=
2.An LSP that is used to provide transport for a service (eg L2/L3 VPN)is n=
ot necessarily TE, and that doesn&#39;t make a VPN any less a VPN<br>3.Slic=
e LS management is not done by IETF, YANG data modeling work is crucial to =
provide level of abstraction needed in multi-domain/multi-technology enviro=
nment.<br><br>In general, from ACTN prospective it is nothing different tha=
n resource allocation that meets constrains as requested by business logic.=
<br><br>Jari and myself have done 5G/slicing introduction to IAB during thi=
s week retreat and planning to follow up with the work in that area.<br><br=
>Cheers,<br>Jeff<br><div class=3D"gmail_quote"><div dir=3D"ltr">On Fri, May=
 19, 2017 at 21:14 Greg Mirsky &lt;<a href=3D"mailto:gregimirsky@gmail.com"=
>gregimirsky@gmail.com</a>&gt; wrote:<br></div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x"><div dir=3D"ltr">Hi Daniele,<div>I think that my interpretation of netwo=
rk slice construct definition by 3GPP is slightly different. Please find my=
 comments in-line tagged GIM&gt;&gt;. Some are to do with terminology but, =
I believe, it is helpful to settle the dictionary and agree on the interpre=
tation of terms.</div><div><br></div><div>Regards,</div><div>Greg</div><div=
 class=3D"gmail_extra"><br><div class=3D"gmail_quote"></div></div></div><di=
v dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote">On Sat,=
 May 20, 2017 at 4:18 AM, Daniele Ceccarelli <span dir=3D"ltr">&lt;<a href=
=3D"mailto:daniele.ceccarelli@ericsson.com" target=3D"_blank">daniele.cecca=
relli@ericsson.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quot=
e" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">=
Hi Young, all,<br>
<br>
i agree with your conclusion but would like to clarify one thing that IMO g=
ot lost in the discussion since its beginning.<br>
<br>
The 3GPP definition says:<br>
&quot;A set of network functions and the resources for these network functi=
ons which are arranged and configured, forming a complete logical network t=
o meet certain network characteristics.&quot;<br>
<br>
This means that a network slice IS NOT a VPN or a TE Tunnel.<br></blockquot=
e></div></div></div><div dir=3D"ltr"><div class=3D"gmail_extra"><div class=
=3D"gmail_quote"><div>GIM&gt;&gt; My view is that VPN or a TE Tunnel could =
be part of instantiation of a network slice. There likely to be additional =
to TE parameters that may be considered, depending on the profile of the se=
rvice requested the NS.</div></div></div></div><div dir=3D"ltr"><div class=
=3D"gmail_extra"><div class=3D"gmail_quote"><div>=C2=A0</div><blockquote cl=
ass=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;p=
adding-left:1ex">
A network slice is &quot;something&quot; (netslices and 3GPP will define wh=
at this something is) that is composed by a &quot;piece&quot; in the RADIO =
domain, a &quot;piece&quot; in the CLOUD domain, a &quot;piece&quot; in the=
 TRANSPORT domain, plus possible other pieces in possible other domains.<br=
></blockquote></div></div></div><div dir=3D"ltr"><div class=3D"gmail_extra"=
><div class=3D"gmail_quote"><div>GIM&gt;&gt; I see separation of RAN and &q=
uot;transport&quot; networks. Indeed, there will be e2e construct (will it =
be still referred as &quot;network slice&quot; or &quot;multi-domain NS&quo=
t;) but it can be decomposed into domain-scope NSes. What you referred to a=
s &quot;piece&quot; I consider as domain-scope NS.</div></div></div></div><=
div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmail_quote"><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #cc=
c solid;padding-left:1ex">
<br>
The word &quot;transport&quot; can be misleading here since one could think=
 of transport technologies (e.g. WDM, OTN), but what I&#39;m referring to a=
s TRANSPORT DOMAIN is that part of the network that is used to carry a pack=
et between two other domains.<br>
In order to have a slice, that portion of the transport domain needs to be =
engineered, hence it is all about building a TE entity and stitching servic=
es to such entity. This is what is in the ACTN scope.<br></blockquote></div=
></div></div><div dir=3D"ltr"><div class=3D"gmail_extra"><div class=3D"gmai=
l_quote"><div>GIM&gt;&gt; Should we use Client-Server terms?=C2=A0</div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #=
ccc solid;padding-left:1ex"></blockquote></div></div></div><div dir=3D"ltr"=
><div class=3D"gmail_extra"><div class=3D"gmail_quote"><blockquote class=3D=
"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding=
-left:1ex">
<br>
My very personal opinion is that whatever belongs to the transport domain b=
elongs to IETF (and is already being addressed), while the rest is a danger=
ous duplication of concepts standardized is other SDOs...but this is anothe=
r discussion that doesn&#39;t fit here.<br>
<br>
BR<br>
<span class=3D"m_-5407545285378184371HOEnZb"><font color=3D"#888888">Daniel=
e<br>
</font></span><span class=3D"m_-5407545285378184371im m_-540754528537818437=
1HOEnZb"><br>
<br>
-----Original Message-----<br>
From: Teas [mailto:<a href=3D"mailto:teas-bounces@ietf.org" target=3D"_blan=
k">teas-bounces@ietf.org</a>] On Behalf Of Leeyoung<br>
Sent: venerd=C3=AC 19 maggio 2017 15:15<br>
To: <a href=3D"mailto:teas@ietf.org" target=3D"_blank">teas@ietf.org</a><br=
>
Cc: <a href=3D"mailto:NetSlices@ietf.org" target=3D"_blank">NetSlices@ietf.=
org</a><br>
</span></blockquote></div></div></div><div dir=3D"ltr"><div class=3D"gmail_=
extra"><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div cla=
ss=3D"m_-5407545285378184371HOEnZb"><div class=3D"m_-5407545285378184371h5"=
>Subject: Re: [Teas] terminology discussion network slicing<br>
<br>
Hi,<br>
<br>
Lou is right. There is a dedicated email list for the discussion of &quot;n=
etwork slicing (cc&#39;ed)&quot; and the discussion about what that term me=
ans should be held on that list.<br>
<br>
We have used similar language in draft-ietf-teas-actn-framework right from =
the<br>
00 version. Recent changes have been an attempt to clarify what the termino=
logy means in the context of ACTN. We are not trying to define or redefine =
&quot;network slicing&quot; in the ACTN document, but are trying to make it=
 clear how ACTN works.<br>
<br>
Therefore I propose the following resolution:<br>
<br>
1. All discussion of the general applicability and definition of &quot;netw=
ork slicing&quot; is held on the netslices mailing list.<br>
<br>
2. We adopt Adrian&#39;s suggestion to explain that the scope of the defini=
tion of the terms used in the ACTN framework is limited to ACTN. That means=
 effectively that if there are components of a wider definition of network =
slicing that are not supported by ACTN, that will be OK.<br>
<br>
I propose to post an updated version in the next few days and I believe tha=
t will allow this draft to move ahead without being blocked by the discussi=
on in netslices. Once the IETF has a stable definition of network slicing w=
e can return and see how ACTN is applicable to that definition an whether m=
ore wok is need (in a separate draft).<br>
<br>
Thanks,<br>
Young<br>
<br>
-----Original Message-----<br>
From: Lou Berger [mailto:<a href=3D"mailto:lberger@labn.net" target=3D"_bla=
nk">lberger@labn.net</a>]<br>
Sent: Tuesday, May 16, 2017 8:35 AM<br>
To: Igor Bryskin &lt;<a href=3D"mailto:Igor.Bryskin@huawei.com" target=3D"_=
blank">Igor.Bryskin@huawei.com</a>&gt;; Belotti, Sergio (Nokia - IT/Vimerca=
te) &lt;<a href=3D"mailto:sergio.belotti@nokia.com" target=3D"_blank">sergi=
o.belotti@nokia.com</a>&gt;; Gert Grammel &lt;<a href=3D"mailto:ggrammel@ju=
niper.net" target=3D"_blank">ggrammel@juniper.net</a>&gt;; Leeyoung &lt;<a =
href=3D"mailto:leeyoung@huawei.com" target=3D"_blank">leeyoung@huawei.com</=
a>&gt;; <a href=3D"mailto:teas@ietf.org" target=3D"_blank">teas@ietf.org</a=
>; <a href=3D"mailto:adrian@olddog.co.uk" target=3D"_blank">adrian@olddog.c=
o.uk</a><br>
Subject: Re: [Teas] terminology discussion network slicing<br>
<br>
Perhaps it&#39;s time to bring the discussion to the slicing list and repor=
t back their reaponse....<br>
<br>
Lou<br>
<br>
<br>
On May 16, 2017 8:31:19 AM Igor Bryskin &lt;<a href=3D"mailto:Igor.Bryskin@=
huawei.com" target=3D"_blank">Igor.Bryskin@huawei.com</a>&gt; wrote:<br>
<br>
&gt; Hi Sergio,<br>
&gt;<br>
&gt; I would also like to hear more from network slicing experts.<br>
&gt;<br>
&gt; My understanding is that the difference in the separation (in terms of=
<br>
&gt; control and data planes, security, etc.). For example, traditional BGP=
<br>
&gt; based L3 VPNs (that use provider&#39;s common control plane for their<=
br>
&gt; management and IP/MPLS TE tunnels to inter-connect their PEs) will<br>
&gt; probably not be able guarantee for the clients msec range connectivity=
<br>
&gt; setup times required by 5g, while provided by the same provider fully<=
br>
&gt; separated/genuinely private IP/MPLS networks (that do not share<br>
&gt; IP/MPLS control plane and infrastructure, whose network topology is<br=
>
&gt; supported by separate L0/L1 connections) hopefully will be able to<br>
&gt; provide such guarantees. Therefore, I define layer network slices as<b=
r>
&gt; dynamically managed fully isolated in control and data planes private<=
br>
&gt; TE layer networks, which may share one or more underlying server layer=
 networks.<br>
&gt;<br>
&gt;<br>
&gt; Cheers,<br>
&gt; Igor<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt; -----Original Message-----<br>
&gt; From: Teas [mailto:<a href=3D"mailto:teas-bounces@ietf.org" target=3D"=
_blank">teas-bounces@ietf.org</a>] On Behalf Of Belotti, Sergio<br>
&gt; (Nokia - IT/Vimercate)<br>
&gt; Sent: Tuesday, May 16, 2017 6:08 AM<br>
&gt; To: Gert Grammel; Leeyoung; <a href=3D"mailto:teas@ietf.org" target=3D=
"_blank">teas@ietf.org</a>; <a href=3D"mailto:adrian@olddog.co.uk" target=
=3D"_blank">adrian@olddog.co.uk</a><br>
&gt; Subject: Re: [Teas] terminology discussion network slicing<br>
&gt;<br>
&gt; Hi Gert,<br>
&gt;<br>
&gt; &quot;Thinking a bit about it I came to the point where &quot;VPN&quot=
; and &quot;network<br>
&gt; slices&quot; seem to describe the same entity or at least a &quot;netw=
ork slice&quot;<br>
&gt; being a VPN of VPNs?&quot;<br>
&gt;<br>
&gt; I share completely your conclusion , I&#39;d like if someone can expla=
in<br>
&gt; if a difference really exists .<br>
&gt;<br>
&gt; Thanks<br>
&gt; Sergio<br>
&gt;<br>
&gt;<br>
&gt; -----Original Message-----<br>
&gt; From: Teas [mailto:<a href=3D"mailto:teas-bounces@ietf.org" target=3D"=
_blank">teas-bounces@ietf.org</a>] On Behalf Of Gert Grammel<br>
&gt; Sent: Monday, May 15, 2017 7:02 PM<br>
&gt; To: Leeyoung &lt;<a href=3D"mailto:leeyoung@huawei.com" target=3D"_bla=
nk">leeyoung@huawei.com</a>&gt;; <a href=3D"mailto:teas@ietf.org" target=3D=
"_blank">teas@ietf.org</a>; <a href=3D"mailto:adrian@olddog.co.uk" target=
=3D"_blank">adrian@olddog.co.uk</a><br>
&gt; Subject: Re: [Teas] terminology discussion network slicing<br>
&gt;<br>
&gt; Leeyoung,<br>
&gt;<br>
&gt; Thank you for taking a stab on this. Usually when getting to a<br>
&gt; definition, I try to establish what kind of existing constructs would<=
br>
&gt; fall under the definition. If my understanding is correct, the<br>
&gt; following list of constructs would all satisfy the definition somehow.=
<br>
&gt; - A TDM network with a p2p TDM connection<br>
&gt; - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)<br>
&gt; - An MPLS LSP using a traffic engineered IP network<br>
&gt; - A L2VPN using a traffic engineered MPLS network<br>
&gt; - A L3VPN using a traffic engineered IP network<br>
&gt; - A TCP connection using a traffic engineered IP network<br>
&gt; - Different QoS classes in an IP network<br>
&gt;<br>
&gt; Thinking a bit about it I came to the point where &quot;VPN&quot; and =
&quot;network<br>
&gt; slices&quot; seem to describe the same entity or at least a &quot;netw=
ork slice&quot;<br>
&gt; being a VPN of VPNs?<br>
&gt;<br>
&gt; Gert<br>
&gt;<br>
&gt;<br>
&gt; On 2017-05-17, 16:44, &quot;Teas on behalf of Leeyoung&quot;<br>
&gt; &lt;<a href=3D"mailto:teas-bounces@ietf.org" target=3D"_blank">teas-bo=
unces@ietf.org</a> on behalf of <a href=3D"mailto:leeyoung@huawei.com" targ=
et=3D"_blank">leeyoung@huawei.com</a>&gt; wrote:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Hi Adrian and others,<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0We&#39;d like cross check with you on some terminol=
ogy we introduced newly. Any<br>
&gt;=C2=A0 =C2=A0 =C2=A0comment on these terms will be greatly appreciated.=
<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0We introduced &#39;network slicing&#39; as follows:=
<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Network slicing is a co=
llection of resources<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that are used to establ=
ish logically dedicated virtual networks<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0over TE networks. It al=
lows a network provider to provide<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0dedicated virtual netwo=
rks for application/customer over a<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0common network infrastr=
ucture. The logically dedicated<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0resources are a part of=
 the larger common network<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0infrastructures that ar=
e shared among various network slice<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0instances which are the=
 end-to-end realization of network<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0slicing, consisting of =
the combination of physically or<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0logically dedicated res=
ources.<br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Thanks.<br>
&gt;=C2=A0 =C2=A0 =C2=A0Young and Daniele<br>
&gt;=C2=A0 =C2=A0 =C2=A0-----Original Message-----<br>
&gt;=C2=A0 =C2=A0 =C2=A0From: Leeyoung<br>
&gt;=C2=A0 =C2=A0 =C2=A0Sent: Friday, May 05, 2017 1:41 PM<br>
&gt;=C2=A0 =C2=A0 =C2=A0To: <a href=3D"mailto:teas@ietf.org" target=3D"_bla=
nk">teas@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Subject: RE: [Teas] I-D Action:<br>
&gt; draft-ietf-teas-actn-framework-05.txt<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Hi,<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0This update is intended to incorporate the comments=
 from the last WG<br>
&gt;=C2=A0 =C2=A0 =C2=A0meeting and any pending issues. We also have taken =
the global editorial<br>
&gt;=C2=A0 =C2=A0 =C2=A0changes to make it consistent through the document.=
 Major changes are:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Inclusion of &quot;network slicing&quot; definiti=
on from ACTN perspective (in the<br>
&gt;=C2=A0 =C2=A0 =C2=A0terminology section)<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Added virtual network service (VNS) section (Sect=
ion 3) to define types<br>
&gt;=C2=A0 =C2=A0 =C2=A0of VNS.<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Incorporated &quot;orchestration&quot; (service/n=
etwork) mapping to ACTN<br>
&gt;=C2=A0 =C2=A0 =C2=A0architecture (See Section 5.2)<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Created a new section 6 (Topology Abstraction Met=
hod) where we imported<br>
&gt;=C2=A0 =C2=A0 =C2=A0some texts from ACTN abstraction method<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/draft-lee-te=
as-actn-abstraction-01" rel=3D"noreferrer" target=3D"_blank">https://tools.=
ietf.org/html/draft-lee-teas-actn-abstraction-01</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0- Added Appendices A &amp; B to discuss example dep=
loyment scenarios such as<br>
&gt;=C2=A0 =C2=A0 =C2=A0example of MDSC and PNC functions integrated in Ser=
vice/Network<br>
&gt;=C2=A0 =C2=A0 =C2=A0Orchestrator (Appendix A) and example of IP + Optic=
al network with L3VPN<br>
&gt;=C2=A0 =C2=A0 =C2=A0service (Appendix B)<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0In regard to ACTN abstraction method draft, we are =
going to keep it as a<br>
&gt;=C2=A0 =C2=A0 =C2=A0separate draft and use this document to elaborate o=
ther aspects not<br>
&gt;=C2=A0 =C2=A0 =C2=A0imported to the framework document.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The following diff pointer will help you see the ch=
anges with this revision:<br>
&gt;<br>
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-fr=
amework-05" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdi=
ff?url2=3Ddraft-ietf-teas-actn-framework-05</a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The co-authors believe that the document is ready f=
or WG LC. Any<br>
&gt;=C2=A0 =C2=A0 =C2=A0changes/comments will be appreciated.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Thanks &amp; Best regards,<br>
&gt;=C2=A0 =C2=A0 =C2=A0Young &amp; Daniele (on behalf of other co-authors/=
contributors)<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0-----Original Message-----<br>
&gt;=C2=A0 =C2=A0 =C2=A0From: Teas [mailto:<a href=3D"mailto:teas-bounces@i=
etf.org" target=3D"_blank">teas-bounces@ietf.org</a>] On Behalf Of <a href=
=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">internet-drafts@ietf=
.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Sent: Friday, May 05, 2017 10:41 AM<br>
&gt;=C2=A0 =C2=A0 =C2=A0To: <a href=3D"mailto:i-d-announce@ietf.org" target=
=3D"_blank">i-d-announce@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Cc: <a href=3D"mailto:teas@ietf.org" target=3D"_bla=
nk">teas@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Subject: [Teas] I-D Action: draft-ietf-teas-actn-fr=
amework-05.txt<br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0A New Internet-Draft is available from the on-line =
Internet-Drafts directories.<br>
&gt;=C2=A0 =C2=A0 =C2=A0This draft is a work item of the Traffic Engineerin=
g Architecture and<br>
&gt;=C2=A0 =C2=A0 =C2=A0Signaling of the IETF.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Title=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0: Framework for Abstraction and Control of Traffic<=
br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Engineered Networks<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Authors=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0: Daniele Ceccarelli<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Young Lee<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-=
ietf-teas-actn-framework-05.txt<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0: 41<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 : 2017-05-05<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Abstract:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Traffic Engineered networks have a variety =
of mechanisms to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 facilitate the separation of the data plane=
 and control plane. They<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 also have a range of management and provisi=
oning protocols to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 configure and activate network resources.=
=C2=A0 These mechanisms<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 represent key technologies for enabling fle=
xible and dynamic<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 networking.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Abstraction of network resources is a techn=
ique that can be applied<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 to a single network domain or across multip=
le domains to create a<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 single virtualized network that is under th=
e control of a network<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 operator or the customer of the operator th=
at actually owns<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 the network resources.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 This document provides a framework for Abst=
raction and Control of<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Traffic Engineered Networks (ACTN).<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The IETF datatracker status page for this draft is:=
<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.ietf.org/doc/draft-i=
etf-teas-actn-framework/" rel=3D"noreferrer" target=3D"_blank">https://data=
tracker.ietf.org/doc/draft-ietf-teas-actn-framework/</a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0There are also htmlized versions available at:<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/draft-ietf-t=
eas-actn-framework-05" rel=3D"noreferrer" target=3D"_blank">https://tools.i=
etf.org/html/draft-ietf-teas-actn-framework-05</a><br>
&gt;<br>
&gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-=
framework-0" rel=3D"noreferrer" target=3D"_blank">https://datatracker.ietf.=
org/doc/html/draft-ietf-teas-actn-framework-0</a><br>
&gt; 5<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0A diff from the previous version is available at:<b=
r>
&gt;<br>
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-fr=
amework-05" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/rfcdi=
ff?url2=3Ddraft-ietf-teas-actn-framework-05</a><br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Please note that it may take a couple of minutes fr=
om the time of<br>
&gt;=C2=A0 =C2=A0 =C2=A0submission until the htmlized version and diff are =
available at <a href=3D"http://tools.ietf.org" rel=3D"noreferrer" target=3D=
"_blank">tools.ietf.org</a>.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Internet-Drafts are also available by anonymous FTP=
 at:<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"ftp://ftp.ietf.org/internet-drafts/" rel=
=3D"noreferrer" target=3D"_blank">ftp://ftp.ietf.org/internet-drafts/</a><b=
r>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0_______________________________________________<br>
&gt;=C2=A0 =C2=A0 =C2=A0Teas mailing list<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"mailto:Teas@ietf.org" target=3D"_blank">=
Teas@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.org/mailman/listinfo/te=
as" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mailman/listi=
nfo/teas</a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0_______________________________________________<br>
&gt;=C2=A0 =C2=A0 =C2=A0Teas mailing list<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"mailto:Teas@ietf.org" target=3D"_blank">=
Teas@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.org/mailman/listinfo/te=
as" rel=3D"noreferrer" target=3D"_blank">https://www.ietf.org/mailman/listi=
nfo/teas</a><br>
&gt;<br>
&gt;<br>
&gt; _______________________________________________<br>
&gt; Teas mailing list<br>
&gt; <a href=3D"mailto:Teas@ietf.org" target=3D"_blank">Teas@ietf.org</a><b=
r>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/teas" rel=3D"noreferr=
er" target=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br>
&gt;<br>
&gt; _______________________________________________<br>
&gt; Teas mailing list<br>
&gt; <a href=3D"mailto:Teas@ietf.org" target=3D"_blank">Teas@ietf.org</a><b=
r>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/teas" rel=3D"noreferr=
er" target=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br>
&gt;<br>
&gt; _______________________________________________<br>
&gt; Teas mailing list<br>
&gt; <a href=3D"mailto:Teas@ietf.org" target=3D"_blank">Teas@ietf.org</a><b=
r>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/teas" rel=3D"noreferr=
er" target=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br>
&gt;<br>
<br>
<br>
_______________________________________________<br>
Teas mailing list<br>
<a href=3D"mailto:Teas@ietf.org" target=3D"_blank">Teas@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/teas" rel=3D"noreferrer" t=
arget=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br>
<br>
_______________________________________________<br></div></div></blockquote=
></div></div></div><div dir=3D"ltr"><div class=3D"gmail_extra"><div class=
=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8=
ex;border-left:1px #ccc solid;padding-left:1ex"><div class=3D"m_-5407545285=
378184371HOEnZb"><div class=3D"m_-5407545285378184371h5">
Netslices mailing list<br>
<a href=3D"mailto:Netslices@ietf.org" target=3D"_blank">Netslices@ietf.org<=
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<a href=3D"https://www.ietf.org/mailman/listinfo/netslices" rel=3D"noreferr=
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_______________________________________________<br>
Teas mailing list<br>
<a href=3D"mailto:Teas@ietf.org" target=3D"_blank">Teas@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/teas" rel=3D"noreferrer" t=
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</blockquote></div>

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To: Igor Bryskin <Igor.Bryskin@huawei.com>, Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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From: Igor Bryskin <Igor.Bryskin@huawei.com>
To: "qiangli (D)" <qiangli3@huawei.com>, Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com>
CC: Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>, "NetSlices@ietf.org" <NetSlices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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Date: Tue, 23 May 2017 20:27:59 +0000
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: Greg Mirsky <gregimirsky@gmail.com>
CC: Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>, "NetSlices@ietf.org" <NetSlices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: Jeff Tantsura <jefftant.ietf@gmail.com>, Greg Mirsky <gregimirsky@gmail.com>
CC: Leeyoung <leeyoung@huawei.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>,  "teas@ietf.org" <teas@ietf.org>
Thread-Topic: [Teas] [Netslices] terminology discussion network slicing
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: Igor Bryskin <Igor.Bryskin@huawei.com>, Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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Thread-Topic: [Teas] terminology discussion  network slicing
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netslices/8h7Mhbf9uMsXOGmddkjVUi36pCU>
Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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Hi Igor,

let me try to answer in line.

Cheers
Daniele  (with a single L) :)=20

-----Original Message-----
From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor Brysk=
in
Sent: sabato 20 maggio 2017 00:12
To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoun=
g@huawei.com>; teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Netslices] [Teas] terminology discussion network slicing

Hi Danielle,

Network slicing may have nothing to do with radio. 5g is just a big reason =
as to why the interest/focus is back on network slicing, which is a very ol=
d concept. I don't think that anyone is arguing with what you wrote.

[>DC] Whether the network slice has to do with radio depends on the definit=
ion of network slice. If we focus on the "transport" slice then I agree wit=
h you, but the network slice IMO spans multiple domains/segments and radio =
can be one of them (as well as e.g. the cloud)

 The questions are:
a) how do you manage these "pieces"?
[>DC]  I would say independently in each domain/segment and then at the orc=
hestration level someone will be in charge to put the pieces together.

b) what policy infrastructure should be put in place?
[>DC] good question. This definitely needs to be end to end, since the user=
 is paying for it.

c) how do you ensure their separation or, conversely, the degree of resourc=
e sharing?
[>DC] Again per domain/segment. In the cloud you might have different slice=
s sharing the same VNG (e.g. IMS or Packet Core), while in the "transport" =
you might have different slices sharing a same tunnel or having dedicated o=
ne.

d) why exactly legacy VPNs are not good enough?
[>DC] IMO legacy VPNs are good enough as "transport" slice. There are sever=
al mechanisms to e.g. extend them from the "transport" domain to the cloud =
domain or to stitch them to e.g. VXLAN in the DC. They just need to be boun=
d to a TE-tunnel or an ACTN VN if you want to have guaranteed SLA for the s=
ervice using such VPN

Cheers,
Igor


 =20

-----Original Message-----
From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
Sent: Friday, May 19, 2017 4:19 PM
To: Leeyoung; teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Teas] terminology discussion network slicing

Hi Young, all,

i agree with your conclusion but would like to clarify one thing that IMO g=
ot lost in the discussion since its beginning.

The 3GPP definition says:=20
"A set of network functions and the resources for these network functions w=
hich are arranged and configured, forming a complete logical network to mee=
t certain network characteristics."

This means that a network slice IS NOT a VPN or a TE Tunnel.
A network slice is "something" (netslices and 3GPP will define what this so=
mething is) that is composed by a "piece" in the RADIO domain, a "piece" in=
 the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other p=
ieces in possible other domains.

The word "transport" can be misleading here since one could think of transp=
ort technologies (e.g. WDM, OTN), but what I'm referring to as TRANSPORT DO=
MAIN is that part of the network that is used to carry a packet between two=
 other domains.=20
In order to have a slice, that portion of the transport domain needs to be =
engineered, hence it is all about building a TE entity and stitching servic=
es to such entity. This is what is in the ACTN scope.

My very personal opinion is that whatever belongs to the transport domain b=
elongs to IETF (and is already being addressed), while the rest is a danger=
ous duplication of concepts standardized is other SDOs...but this is anothe=
r discussion that doesn't fit here.

BR
Daniele =20


-----Original Message-----
From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 19 maggio 2017 15:15
To: teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Teas] terminology discussion network slicing

Hi,

Lou is right. There is a dedicated email list for the discussion of "networ=
k slicing (cc'ed)" and the discussion about what that term means should be =
held on that list.=20

We have used similar language in draft-ietf-teas-actn-framework right from =
the
00 version. Recent changes have been an attempt to clarify what the termino=
logy means in the context of ACTN. We are not trying to define or redefine =
"network slicing" in the ACTN document, but are trying to make it clear how=
 ACTN works.

Therefore I propose the following resolution:

1. All discussion of the general applicability and definition of "network s=
licing" is held on the netslices mailing list.

2. We adopt Adrian's suggestion to explain that the scope of the definition=
 of the terms used in the ACTN framework is limited to ACTN. That means eff=
ectively that if there are components of a wider definition of network slic=
ing that are not supported by ACTN, that will be OK.=20

I propose to post an updated version in the next few days and I believe tha=
t will allow this draft to move ahead without being blocked by the discussi=
on in netslices. Once the IETF has a stable definition of network slicing w=
e can return and see how ACTN is applicable to that definition an whether m=
ore wok is need (in a separate draft).

Thanks,
Young

-----Original Message-----
From: Lou Berger [mailto:lberger@labn.net]
Sent: Tuesday, May 16, 2017 8:35 AM
To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT/Vim=
ercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>; Le=
eyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
Subject: Re: [Teas] terminology discussion network slicing

Perhaps it's time to bring the discussion to the slicing list and report ba=
ck their reaponse....

Lou


On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:

> Hi Sergio,
>
> I would also like to hear more from network slicing experts.
>
> My understanding is that the difference in the separation (in terms of=20
> control and data planes, security, etc.). For example, traditional BGP=20
> based L3 VPNs (that use provider's common control plane for their=20
> management and IP/MPLS TE tunnels to inter-connect their PEs) will=20
> probably not be able guarantee for the clients msec range connectivity=20
> setup times required by 5g, while provided by the same provider fully=20
> separated/genuinely private IP/MPLS networks (that do not share=20
> IP/MPLS control plane and infrastructure, whose network topology is=20
> supported by separate L0/L1 connections) hopefully will be able to=20
> provide such guarantees. Therefore, I define layer network slices as=20
> dynamically managed fully isolated in control and data planes private=20
> TE layer networks, which may share one or more underlying server layer ne=
tworks.
>
>
> Cheers,
> Igor
>
>
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio=20
> (Nokia - IT/Vimercate)
> Sent: Tuesday, May 16, 2017 6:08 AM
> To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Hi Gert,
>
> "Thinking a bit about it I came to the point where "VPN" and "network=20
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?"
>
> I share completely your conclusion , I'd like if someone can explain=20
> if a difference really exists .
>
> Thanks
> Sergio
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
> Sent: Monday, May 15, 2017 7:02 PM
> To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Leeyoung,
>
> Thank you for taking a stab on this. Usually when getting to a=20
> definition, I try to establish what kind of existing constructs would=20
> fall under the definition. If my understanding is correct, the=20
> following list of constructs would all satisfy the definition somehow.
> - A TDM network with a p2p TDM connection
> - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
> - An MPLS LSP using a traffic engineered IP network
> - A L2VPN using a traffic engineered MPLS network
> - A L3VPN using a traffic engineered IP network
> - A TCP connection using a traffic engineered IP network
> - Different QoS classes in an IP network
>
> Thinking a bit about it I came to the point where "VPN" and "network=20
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?
>
> Gert
>
>
> On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"=20
> <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>
>     Hi Adrian and others,
>
>     We'd like cross check with you on some terminology we introduced newl=
y. Any=20
>     comment on these terms will be greatly appreciated.
>
>     We introduced 'network slicing' as follows:
>
>             Network slicing is a collection of resources
>             that are used to establish logically dedicated virtual networ=
ks
>             over TE networks. It allows a network provider to provide
>             dedicated virtual networks for application/customer over a
>             common network infrastructure. The logically dedicated
>             resources are a part of the larger common network
>             infrastructures that are shared among various network slice
>             instances which are the end-to-end realization of network
>             slicing, consisting of the combination of physically or
>             logically dedicated resources.
>
>
>     Thanks.
>     Young and Daniele
>     -----Original Message-----
>     From: Leeyoung
>     Sent: Friday, May 05, 2017 1:41 PM
>     To: teas@ietf.org
>     Subject: RE: [Teas] I-D Action:=20
> draft-ietf-teas-actn-framework-05.txt
>
>     Hi,
>
>     This update is intended to incorporate the comments from the last WG=
=20
>     meeting and any pending issues. We also have taken the global editori=
al=20
>     changes to make it consistent through the document. Major changes are=
:
>
>     - Inclusion of "network slicing" definition from ACTN perspective (in=
 the=20
>     terminology section)
>     - Added virtual network service (VNS) section (Section 3) to define t=
ypes=20
>     of VNS.
>     - Incorporated "orchestration" (service/network) mapping to ACTN=20
>     architecture (See Section 5.2)
>     - Created a new section 6 (Topology Abstraction Method) where we impo=
rted=20
>     some texts from ACTN abstraction method =20
>     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>     - Added Appendices A & B to discuss example deployment scenarios such=
 as=20
>     example of MDSC and PNC functions integrated in Service/Network=20
>     Orchestrator (Appendix A) and example of IP + Optical network with L3=
VPN=20
>     service (Appendix B)
>
>     In regard to ACTN abstraction method draft, we are going to keep it a=
s a=20
>     separate draft and use this document to elaborate other aspects not=20
>     imported to the framework document.
>
>     The following diff pointer will help you see the changes with this re=
vision:
>    =20
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>     The co-authors believe that the document is ready for WG LC. Any=20
>     changes/comments will be appreciated.
>
>     Thanks & Best regards,
>     Young & Daniele (on behalf of other co-authors/contributors)
>
>     -----Original Message-----
>     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-draft=
s@ietf.org
>     Sent: Friday, May 05, 2017 10:41 AM
>     To: i-d-announce@ietf.org
>     Cc: teas@ietf.org
>     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>
>
>     A New Internet-Draft is available from the on-line Internet-Drafts di=
rectories.
>     This draft is a work item of the Traffic Engineering Architecture and=
=20
>     Signaling of the IETF.
>
>             Title           : Framework for Abstraction and Control of Tr=
affic=20
>             Engineered Networks
>             Authors         : Daniele Ceccarelli
>                               Young Lee
>     	Filename        : draft-ietf-teas-actn-framework-05.txt
>     	Pages           : 41
>     	Date            : 2017-05-05
>
>     Abstract:
>        Traffic Engineered networks have a variety of mechanisms to
>        facilitate the separation of the data plane and control plane. The=
y
>        also have a range of management and provisioning protocols to
>        configure and activate network resources.  These mechanisms
>        represent key technologies for enabling flexible and dynamic
>        networking.
>
>        Abstraction of network resources is a technique that can be applie=
d
>        to a single network domain or across multiple domains to create a
>        single virtualized network that is under the control of a network
>        operator or the customer of the operator that actually owns
>        the network resources.
>
>        This document provides a framework for Abstraction and Control of
>        Traffic Engineered Networks (ACTN).
>
>
>
>     The IETF datatracker status page for this draft is:
>     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>
>     There are also htmlized versions available at:
>     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>    =20
> https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
> 5
>
>     A diff from the previous version is available at:
>    =20
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>
>     Please note that it may take a couple of minutes from the time of=20
>     submission until the htmlized version and diff are available at tools=
.ietf.org.
>
>     Internet-Drafts are also available by anonymous FTP at:
>     ftp://ftp.ietf.org/internet-drafts/
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org
>     https://www.ietf.org/mailman/listinfo/teas
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org
>     https://www.ietf.org/mailman/listinfo/teas
>
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>


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To: Igor Bryskin <Igor.Bryskin@huawei.com>, Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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Date: Wed, 24 May 2017 05:45:01 -0700
From: Jeff Tantsura <jefftant.ietf@gmail.com>
To: Igor Bryskin <Igor.Bryskin@huawei.com>, "qiangli (D)" <qiangli3@huawei.com>, Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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Thread-Topic: [Teas] terminology discussion  network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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+1 Igor

>From transport side (L0-L3) we need to expose set of API=E2=80=99s that would all=
ow to request a set of resources (a slice) either virtualized of physical th=
at meet the constrains as requested by the business logic. Radio, while woul=
d definitely be one of most important use cases, would not be exclusively fo=
r radio use only. Any network management/ orchestration layer ideally should=
 be able to use same set of API=E2=80=99s to request an e2e service.

Cheers,
Jeff
=20

On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" <teas-bounces@ietf.org =
on behalf of Igor.Bryskin@huawei.com> wrote:

    Hi Cristina,
   =20
    I didn=E2=80=99t say that ns has nothing to do with radio. I said that ns *ma=
y* have nothing to do with radio, i.e. may support/enable network architectu=
res that do not involve radio necessarily.
   =20
    Igor
   =20
    -----Original Message-----
    From: qiangli (D)=20
    Sent: Wednesday, May 24, 2017 5:05 AM
    To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion network slicing
   =20
    Hi Igor,
   =20
    I share the same opinion on 5G and network slicing, but can't see the r=
elation between this opinion and your conclusion that ns has nothing to do w=
ith radio.
   =20
    Best regards,
   =20
    Cristina QIANG
   =20
   =20
    -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    =E5=8F=91=E4=BB=B6=E4=BA=BA: Igor Bryskin=20
    =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2017=E5=B9=B45=E6=9C=8820=E6=97=A5 23:50
    =E6=94=B6=E4=BB=B6=E4=BA=BA: qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
    =E6=8A=84=E9=80=81: NetSlices@ietf.org
    =E4=B8=BB=E9=A2=98: RE: [Teas] terminology discussion network slicing
   =20
    Hi Cristina,
   =20
    People whose opinion I respect very much told me that even the 3GPP net=
work slicing definition and effort is not 5G specific.  Network slicing is v=
iewed as an important capability of 5G, but it could serve other architectur=
es.
   =20
    Cheers,
    Igor
   =20
    -----Original Message-----
    From: qiangli (D)
    Sent: Saturday, May 20, 2017 5:27 AM
    To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion network slicing
   =20
    Hi Igor,
   =20
    I have different opinion on " Network slicing may have nothing to do wi=
th radio".
    IMO, network slicing should be a resource-oriented management mode. The=
 end-to-end network slice (from UE to server/other UE) of course involves th=
e radio resource, usually we use the word "RAN-radio access network" rather =
than simply say "radio". The Frequency band, time, code, equipment/site, and=
 software are a number of dimensions, in which RAN resources can be isolated=
 [Online available http://www.huawei.com/en/industry-insights/mbb-2020/trend=
s-insights/5g-service-guaranteed-network-slicing-whitepaper].
   =20
    Best regards,
   =20
    Qiang, Li (Cristina)
    NetLab, Huawei
   =20
   =20
    -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    =E5=8F=91=E4=BB=B6=E4=BA=BA: Netslices [mailto:netslices-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Igor Br=
yskin
    =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2017=E5=B9=B45=E6=9C=8820=E6=97=A5 6:12
    =E6=94=B6=E4=BB=B6=E4=BA=BA: Daniele Ceccarelli; Leeyoung; teas@ietf.org
    =E6=8A=84=E9=80=81: NetSlices@ietf.org
    =E4=B8=BB=E9=A2=98: Re: [Netslices] [Teas] terminology discussion network slicing
   =20
    Hi Danielle,
   =20
    Network slicing may have nothing to do with radio. 5g is just a big rea=
son as to why the interest/focus is back on network slicing, which is a very=
 old concept. I don't think that anyone is arguing with what you wrote. The =
questions are:
    a) how do you manage these "pieces"?
    b) what policy infrastructure should be put in place?
    c) how do you ensure their separation or, conversely, the degree of res=
ource sharing?
    d) why exactly legacy VPNs are not good enough?
   =20
    Cheers,
    Igor
   =20
   =20
     =20
   =20
    -----Original Message-----
    From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele Ceccarel=
li
    Sent: Friday, May 19, 2017 4:19 PM
    To: Leeyoung; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: Re: [Teas] terminology discussion network slicing
   =20
    Hi Young, all,
   =20
    i agree with your conclusion but would like to clarify one thing that I=
MO got lost in the discussion since its beginning.
   =20
    The 3GPP definition says:=20
    "A set of network functions and the resources for these network functio=
ns which are arranged and configured, forming a complete logical network to =
meet certain network characteristics."
   =20
    This means that a network slice IS NOT a VPN or a TE Tunnel.
    A network slice is "something" (netslices and 3GPP will define what thi=
s something is) that is composed by a "piece" in the RADIO domain, a "piece"=
 in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other=
 pieces in possible other domains.
   =20
    The word "transport" can be misleading here since one could think of tr=
ansport technologies (e.g. WDM, OTN), but what I'm referring to as TRANSPORT=
 DOMAIN is that part of the network that is used to carry a packet between t=
wo other domains.=20
    In order to have a slice, that portion of the transport domain needs to=
 be engineered, hence it is all about building a TE entity and stitching ser=
vices to such entity. This is what is in the ACTN scope.
   =20
    My very personal opinion is that whatever belongs to the transport doma=
in belongs to IETF (and is already being addressed), while the rest is a dan=
gerous duplication of concepts standardized is other SDOs...but this is anot=
her discussion that doesn't fit here.
   =20
    BR
    Daniele =20
   =20
   =20
    -----Original Message-----
    From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
    Sent: venerd=C3=AC 19 maggio 2017 15:15
    To: teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: Re: [Teas] terminology discussion network slicing
   =20
    Hi,
   =20
    Lou is right. There is a dedicated email list for the discussion of "ne=
twork slicing (cc'ed)" and the discussion about what that term means should =
be held on that list.=20
   =20
    We have used similar language in draft-ietf-teas-actn-framework right f=
rom the
    00 version. Recent changes have been an attempt to clarify what the ter=
minology means in the context of ACTN. We are not trying to define or redefi=
ne "network slicing" in the ACTN document, but are trying to make it clear h=
ow ACTN works.
   =20
    Therefore I propose the following resolution:
   =20
    1. All discussion of the general applicability and definition of "netwo=
rk slicing" is held on the netslices mailing list.
   =20
    2. We adopt Adrian's suggestion to explain that the scope of the defini=
tion of the terms used in the ACTN framework is limited to ACTN. That means =
effectively that if there are components of a wider definition of network sl=
icing that are not supported by ACTN, that will be OK.=20
   =20
    I propose to post an updated version in the next few days and I believe=
 that will allow this draft to move ahead without being blocked by the discu=
ssion in netslices. Once the IETF has a stable definition of network slicing=
 we can return and see how ACTN is applicable to that definition an whether =
more wok is need (in a separate draft).
   =20
    Thanks,
    Young
   =20
    -----Original Message-----
    From: Lou Berger [mailto:lberger@labn.net]
    Sent: Tuesday, May 16, 2017 8:35 AM
    To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT=
/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>;=
 Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
    Subject: Re: [Teas] terminology discussion network slicing
   =20
    Perhaps it's time to bring the discussion to the slicing list and repor=
t back their reaponse....
   =20
    Lou
   =20
   =20
    On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote=
:
   =20
    > Hi Sergio,
    >
    > I would also like to hear more from network slicing experts.
    >
    > My understanding is that the difference in the separation (in terms o=
f=20
    > control and data planes, security, etc.). For example, traditional BG=
P=20
    > based L3 VPNs (that use provider's common control plane for their=20
    > management and IP/MPLS TE tunnels to inter-connect their PEs) will=20
    > probably not be able guarantee for the clients msec range connectivit=
y=20
    > setup times required by 5g, while provided by the same provider fully=
=20
    > separated/genuinely private IP/MPLS networks (that do not share=20
    > IP/MPLS control plane and infrastructure, whose network topology is=20
    > supported by separate L0/L1 connections) hopefully will be able to=20
    > provide such guarantees. Therefore, I define layer network slices as=20
    > dynamically managed fully isolated in control and data planes private=
=20
    > TE layer networks, which may share one or more underlying server laye=
r networks.
    >
    >
    > Cheers,
    > Igor
    >
    >
    >
    >
    > -----Original Message-----
    > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergi=
o=20
    > (Nokia - IT/Vimercate)
    > Sent: Tuesday, May 16, 2017 6:08 AM
    > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
    > Subject: Re: [Teas] terminology discussion network slicing
    >
    > Hi Gert,
    >
    > "Thinking a bit about it I came to the point where "VPN" and "network=
=20
    > slices" seem to describe the same entity or at least a "network slice=
"
    > being a VPN of VPNs?"
    >
    > I share completely your conclusion , I'd like if someone can explain=20
    > if a difference really exists .
    >
    > Thanks
    > Sergio
    >
    >
    > -----Original Message-----
    > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
    > Sent: Monday, May 15, 2017 7:02 PM
    > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.u=
k
    > Subject: Re: [Teas] terminology discussion network slicing
    >
    > Leeyoung,
    >
    > Thank you for taking a stab on this. Usually when getting to a=20
    > definition, I try to establish what kind of existing constructs would=
=20
    > fall under the definition. If my understanding is correct, the=20
    > following list of constructs would all satisfy the definition somehow=
.
    > - A TDM network with a p2p TDM connection
    > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
    > - An MPLS LSP using a traffic engineered IP network
    > - A L2VPN using a traffic engineered MPLS network
    > - A L3VPN using a traffic engineered IP network
    > - A TCP connection using a traffic engineered IP network
    > - Different QoS classes in an IP network
    >
    > Thinking a bit about it I came to the point where "VPN" and "network=20
    > slices" seem to describe the same entity or at least a "network slice=
"
    > being a VPN of VPNs?
    >
    > Gert
    >
    >
    > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"=20
    > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
    >
    >     Hi Adrian and others,
    >
    >     We'd like cross check with you on some terminology we introduced =
newly. Any=20
    >     comment on these terms will be greatly appreciated.
    >
    >     We introduced 'network slicing' as follows:
    >
    >             Network slicing is a collection of resources
    >             that are used to establish logically dedicated virtual ne=
tworks
    >             over TE networks. It allows a network provider to provide
    >             dedicated virtual networks for application/customer over =
a
    >             common network infrastructure. The logically dedicated
    >             resources are a part of the larger common network
    >             infrastructures that are shared among various network sli=
ce
    >             instances which are the end-to-end realization of network
    >             slicing, consisting of the combination of physically or
    >             logically dedicated resources.
    >
    >
    >     Thanks.
    >     Young and Daniele
    >     -----Original Message-----
    >     From: Leeyoung
    >     Sent: Friday, May 05, 2017 1:41 PM
    >     To: teas@ietf.org
    >     Subject: RE: [Teas] I-D Action:=20
    > draft-ietf-teas-actn-framework-05.txt
    >
    >     Hi,
    >
    >     This update is intended to incorporate the comments from the last=
 WG=20
    >     meeting and any pending issues. We also have taken the global edi=
torial=20
    >     changes to make it consistent through the document. Major changes=
 are:
    >
    >     - Inclusion of "network slicing" definition from ACTN perspective=
 (in the=20
    >     terminology section)
    >     - Added virtual network service (VNS) section (Section 3) to defi=
ne types=20
    >     of VNS.
    >     - Incorporated "orchestration" (service/network) mapping to ACTN=20
    >     architecture (See Section 5.2)
    >     - Created a new section 6 (Topology Abstraction Method) where we =
imported=20
    >     some texts from ACTN abstraction method =20
    >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
    >     - Added Appendices A & B to discuss example deployment scenarios =
such as=20
    >     example of MDSC and PNC functions integrated in Service/Network=20
    >     Orchestrator (Appendix A) and example of IP + Optical network wit=
h L3VPN=20
    >     service (Appendix B)
    >
    >     In regard to ACTN abstraction method draft, we are going to keep =
it as a=20
    >     separate draft and use this document to elaborate other aspects n=
ot=20
    >     imported to the framework document.
    >
    >     The following diff pointer will help you see the changes with thi=
s revision:
    >    =20
    > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >
    >     The co-authors believe that the document is ready for WG LC. Any=20
    >     changes/comments will be appreciated.
    >
    >     Thanks & Best regards,
    >     Young & Daniele (on behalf of other co-authors/contributors)
    >
    >     -----Original Message-----
    >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-d=
rafts@ietf.org
    >     Sent: Friday, May 05, 2017 10:41 AM
    >     To: i-d-announce@ietf.org
    >     Cc: teas@ietf.org
    >     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
    >
    >
    >     A New Internet-Draft is available from the on-line Internet-Draft=
s directories.
    >     This draft is a work item of the Traffic Engineering Architecture=
 and=20
    >     Signaling of the IETF.
    >
    >             Title           : Framework for Abstraction and Control o=
f Traffic=20
    >             Engineered Networks
    >             Authors         : Daniele Ceccarelli
    >                               Young Lee
    >     	Filename        : draft-ietf-teas-actn-framework-05.txt
    >     	Pages           : 41
    >     	Date            : 2017-05-05
    >
    >     Abstract:
    >        Traffic Engineered networks have a variety of mechanisms to
    >        facilitate the separation of the data plane and control plane.=
 They
    >        also have a range of management and provisioning protocols to
    >        configure and activate network resources.  These mechanisms
    >        represent key technologies for enabling flexible and dynamic
    >        networking.
    >
    >        Abstraction of network resources is a technique that can be ap=
plied
    >        to a single network domain or across multiple domains to creat=
e a
    >        single virtualized network that is under the control of a netw=
ork
    >        operator or the customer of the operator that actually owns
    >        the network resources.
    >
    >        This document provides a framework for Abstraction and Control=
 of
    >        Traffic Engineered Networks (ACTN).
    >
    >
    >
    >     The IETF datatracker status page for this draft is:
    >     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
    >
    >     There are also htmlized versions available at:
    >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
    >    =20
    > https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-=
0
    > 5
    >
    >     A diff from the previous version is available at:
    >    =20
    > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >
    >
    >     Please note that it may take a couple of minutes from the time of=
=20
    >     submission until the htmlized version and diff are available at t=
ools.ietf.org.
    >
    >     Internet-Drafts are also available by anonymous FTP at:
    >     ftp://ftp.ietf.org/internet-drafts/
    >
    >     _______________________________________________
    >     Teas mailing list
    >     Teas@ietf.org
    >     https://www.ietf.org/mailman/listinfo/teas
    >
    >     _______________________________________________
    >     Teas mailing list
    >     Teas@ietf.org
    >     https://www.ietf.org/mailman/listinfo/teas
    >
    >
    > _______________________________________________
    > Teas mailing list
    > Teas@ietf.org
    > https://www.ietf.org/mailman/listinfo/teas
    >
    > _______________________________________________
    > Teas mailing list
    > Teas@ietf.org
    > https://www.ietf.org/mailman/listinfo/teas
    >
    > _______________________________________________
    > Teas mailing list
    > Teas@ietf.org
    > https://www.ietf.org/mailman/listinfo/teas
    >
   =20
   =20
    _______________________________________________
    Teas mailing list
    Teas@ietf.org
    https://www.ietf.org/mailman/listinfo/teas
   =20
    _______________________________________________
    Teas mailing list
    Teas@ietf.org
    https://www.ietf.org/mailman/listinfo/teas
   =20
    _______________________________________________
    Netslices mailing list
    Netslices@ietf.org
    https://www.ietf.org/mailman/listinfo/netslices
    _______________________________________________
    Teas mailing list
    Teas@ietf.org
    https://www.ietf.org/mailman/listinfo/teas
   =20



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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Wed, 24 May 2017 20:48:38 +0800
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To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
Cc: Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>,  "NetSlices@ietf.org" <NetSlices@ietf.org>
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Hi Daniele,
thank you for your kind and thorough consideration, glad we agree on the
terminology. One minor, I think, note and the answer to your question under
GIM2>> tag in-line.

Regards,
Greg

On Wed, May 24, 2017 at 4:39 AM, Daniele Ceccarelli <
daniele.ceccarelli@ericsson.com> wrote:

> Hi Greg,
>
>
>
> good points. Please see in line.
>
>
>
> Cheers
>
> Daniele
>
>
>
> *From:* Greg Mirsky [mailto:gregimirsky@gmail.com]
> *Sent:* sabato 20 maggio 2017 06:14
> *To:* Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
> *Cc:* Leeyoung <leeyoung@huawei.com>; teas@ietf.org; NetSlices@ietf.org
> *Subject:* Re: [Netslices] [Teas] terminology discussion network slicing
>
>
>
> Hi Daniele,
>
> I think that my interpretation of network slice construct definition by
> 3GPP is slightly different. Please find my comments in-line tagged GIM>>.
> Some are to do with terminology but, I believe, it is helpful to settle t=
he
> dictionary and agree on the interpretation of terms.
>
>
>
> Regards,
>
> Greg
>
>
>
> On Sat, May 20, 2017 at 4:18 AM, Daniele Ceccarelli <
> daniele.ceccarelli@ericsson.com> wrote:
>
> Hi Young, all,
>
> i agree with your conclusion but would like to clarify one thing that IMO
> got lost in the discussion since its beginning.
>
> The 3GPP definition says:
> "A set of network functions and the resources for these network functions
> which are arranged and configured, forming a complete logical network to
> meet certain network characteristics."
>
> This means that a network slice IS NOT a VPN or a TE Tunnel.
>
> GIM>> My view is that VPN or a TE Tunnel could be part of instantiation o=
f
> a network slice. There likely to be additional to TE parameters that may =
be
> considered, depending on the profile of the service requested the NS.
>
> *[>DC] I should have said =E2=80=9Cthis means that a network might not be=
 JUST a
> VPN or a TE Tunnel=E2=80=9D and hence agree with you on the fact that the=
 VPN or
> the TE Tunnel could be part of the network slice. *
>
>
>
> A network slice is "something" (netslices and 3GPP will define what this
> something is) that is composed by a "piece" in the RADIO domain, a "piece=
"
> in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible oth=
er
> pieces in possible other domains.
>
> GIM>> I see separation of RAN and "transport" networks. Indeed, there wil=
l
> be e2e construct (will it be still referred as "network slice" or
> "multi-domain NS") but it can be decomposed into domain-scope NSes. What
> you referred to as "piece" I consider as domain-scope NS.
>
> *[>DC] This is another terminology issue. I agree on the separation
> between the RAN domain and the =E2=80=9Ctransport=E2=80=9D domain (let=E2=
=80=99s keep on using the
> work transport with quotation marks for the time being) and all the other
> domains in the network. IMO the network slice is the end to end entity th=
at
> is built by a RAN slice plus a =E2=80=9Ctransport=E2=80=9D slice plus oth=
er potential
> slices. And the =E2=80=9Ctransport=E2=80=9D slice could be a VPN, a TE tu=
nnel=E2=80=A6*
>
GIM2>> If to a segment of a network slice instance in a core network we
refer as transport domain, then, as I understand, it's peer may be not only
RAN segment but, e.g., segment of an access network of another kind.

>
> The word "transport" can be misleading here since one could think of
> transport technologies (e.g. WDM, OTN), but what I'm referring to as
> TRANSPORT DOMAIN is that part of the network that is used to carry a pack=
et
> between two other domains.
> In order to have a slice, that portion of the transport domain needs to b=
e
> engineered, hence it is all about building a TE entity and stitching
> services to such entity. This is what is in the ACTN scope.
>
> GIM>> Should we use Client-Server terms?
>
> *[>DC] WRT what? Do you mean wrt the fact that the relationship between
> e.g. the RAN slice and the =E2=80=9Ctransport=E2=80=9D slice could be cli=
ent- server? I see
> it more a peering relationship. ON the other side WITHIN the =E2=80=9Ctra=
nsport=E2=80=9D
> slice you could have different layers with client-server relationship,
> that=E2=80=99s right.*
>
GIM2>> Yes, should have been clearer, it is the latter.

>
> My very personal opinion is that whatever belongs to the transport domain
> belongs to IETF (and is already being addressed), while the rest is a
> dangerous duplication of concepts standardized is other SDOs...but this i=
s
> another discussion that doesn't fit here.
>
> BR
> Daniele
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
> Sent: venerd=C3=AC 19 maggio 2017 15:15
> To: teas@ietf.org
> Cc: NetSlices@ietf.org
>
> Subject: Re: [Teas] terminology discussion network slicing
>
> Hi,
>
> Lou is right. There is a dedicated email list for the discussion of
> "network slicing (cc'ed)" and the discussion about what that term means
> should be held on that list.
>
> We have used similar language in draft-ietf-teas-actn-framework right fro=
m
> the
> 00 version. Recent changes have been an attempt to clarify what the
> terminology means in the context of ACTN. We are not trying to define or
> redefine "network slicing" in the ACTN document, but are trying to make i=
t
> clear how ACTN works.
>
> Therefore I propose the following resolution:
>
> 1. All discussion of the general applicability and definition of "network
> slicing" is held on the netslices mailing list.
>
> 2. We adopt Adrian's suggestion to explain that the scope of the
> definition of the terms used in the ACTN framework is limited to ACTN. Th=
at
> means effectively that if there are components of a wider definition of
> network slicing that are not supported by ACTN, that will be OK.
>
> I propose to post an updated version in the next few days and I believe
> that will allow this draft to move ahead without being blocked by the
> discussion in netslices. Once the IETF has a stable definition of network
> slicing we can return and see how ACTN is applicable to that definition a=
n
> whether more wok is need (in a separate draft).
>
> Thanks,
> Young
>
> -----Original Message-----
> From: Lou Berger [mailto:lberger@labn.net]
> Sent: Tuesday, May 16, 2017 8:35 AM
> To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia -
> IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel <
> ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org;
> adrian@olddog.co.uk
> Subject: Re: [Teas] terminology discussion network slicing
>
> Perhaps it's time to bring the discussion to the slicing list and report
> back their reaponse....
>
> Lou
>
>
> On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:
>
> > Hi Sergio,
> >
> > I would also like to hear more from network slicing experts.
> >
> > My understanding is that the difference in the separation (in terms of
> > control and data planes, security, etc.). For example, traditional BGP
> > based L3 VPNs (that use provider's common control plane for their
> > management and IP/MPLS TE tunnels to inter-connect their PEs) will
> > probably not be able guarantee for the clients msec range connectivity
> > setup times required by 5g, while provided by the same provider fully
> > separated/genuinely private IP/MPLS networks (that do not share
> > IP/MPLS control plane and infrastructure, whose network topology is
> > supported by separate L0/L1 connections) hopefully will be able to
> > provide such guarantees. Therefore, I define layer network slices as
> > dynamically managed fully isolated in control and data planes private
> > TE layer networks, which may share one or more underlying server layer
> networks.
> >
> >
> > Cheers,
> > Igor
> >
> >
> >
> >
> > -----Original Message-----
> > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio
> > (Nokia - IT/Vimercate)
> > Sent: Tuesday, May 16, 2017 6:08 AM
> > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
> > Subject: Re: [Teas] terminology discussion network slicing
> >
> > Hi Gert,
> >
> > "Thinking a bit about it I came to the point where "VPN" and "network
> > slices" seem to describe the same entity or at least a "network slice"
> > being a VPN of VPNs?"
> >
> > I share completely your conclusion , I'd like if someone can explain
> > if a difference really exists .
> >
> > Thanks
> > Sergio
> >
> >
> > -----Original Message-----
> > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
> > Sent: Monday, May 15, 2017 7:02 PM
> > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
> > Subject: Re: [Teas] terminology discussion network slicing
> >
> > Leeyoung,
> >
> > Thank you for taking a stab on this. Usually when getting to a
> > definition, I try to establish what kind of existing constructs would
> > fall under the definition. If my understanding is correct, the
> > following list of constructs would all satisfy the definition somehow.
> > - A TDM network with a p2p TDM connection
> > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
> > - An MPLS LSP using a traffic engineered IP network
> > - A L2VPN using a traffic engineered MPLS network
> > - A L3VPN using a traffic engineered IP network
> > - A TCP connection using a traffic engineered IP network
> > - Different QoS classes in an IP network
> >
> > Thinking a bit about it I came to the point where "VPN" and "network
> > slices" seem to describe the same entity or at least a "network slice"
> > being a VPN of VPNs?
> >
> > Gert
> >
> >
> > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
> > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
> >
> >     Hi Adrian and others,
> >
> >     We'd like cross check with you on some terminology we introduced
> newly. Any
> >     comment on these terms will be greatly appreciated.
> >
> >     We introduced 'network slicing' as follows:
> >
> >             Network slicing is a collection of resources
> >             that are used to establish logically dedicated virtual
> networks
> >             over TE networks. It allows a network provider to provide
> >             dedicated virtual networks for application/customer over a
> >             common network infrastructure. The logically dedicated
> >             resources are a part of the larger common network
> >             infrastructures that are shared among various network slice
> >             instances which are the end-to-end realization of network
> >             slicing, consisting of the combination of physically or
> >             logically dedicated resources.
> >
> >
> >     Thanks.
> >     Young and Daniele
> >     -----Original Message-----
> >     From: Leeyoung
> >     Sent: Friday, May 05, 2017 1:41 PM
> >     To: teas@ietf.org
> >     Subject: RE: [Teas] I-D Action:
> > draft-ietf-teas-actn-framework-05.txt
> >
> >     Hi,
> >
> >     This update is intended to incorporate the comments from the last W=
G
> >     meeting and any pending issues. We also have taken the global
> editorial
> >     changes to make it consistent through the document. Major changes
> are:
> >
> >     - Inclusion of "network slicing" definition from ACTN perspective
> (in the
> >     terminology section)
> >     - Added virtual network service (VNS) section (Section 3) to define
> types
> >     of VNS.
> >     - Incorporated "orchestration" (service/network) mapping to ACTN
> >     architecture (See Section 5.2)
> >     - Created a new section 6 (Topology Abstraction Method) where we
> imported
> >     some texts from ACTN abstraction method
> >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
> >     - Added Appendices A & B to discuss example deployment scenarios
> such as
> >     example of MDSC and PNC functions integrated in Service/Network
> >     Orchestrator (Appendix A) and example of IP + Optical network with
> L3VPN
> >     service (Appendix B)
> >
> >     In regard to ACTN abstraction method draft, we are going to keep it
> as a
> >     separate draft and use this document to elaborate other aspects not
> >     imported to the framework document.
> >
> >     The following diff pointer will help you see the changes with this
> revision:
> >
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
> >
> >     The co-authors believe that the document is ready for WG LC. Any
> >     changes/comments will be appreciated.
> >
> >     Thanks & Best regards,
> >     Young & Daniele (on behalf of other co-authors/contributors)
> >
> >     -----Original Message-----
> >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of
> internet-drafts@ietf.org
> >     Sent: Friday, May 05, 2017 10:41 AM
> >     To: i-d-announce@ietf.org
> >     Cc: teas@ietf.org
> >     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
> >
> >
> >     A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
> >     This draft is a work item of the Traffic Engineering Architecture a=
nd
> >     Signaling of the IETF.
> >
> >             Title           : Framework for Abstraction and Control of
> Traffic
> >             Engineered Networks
> >             Authors         : Daniele Ceccarelli
> >                               Young Lee
> >       Filename        : draft-ietf-teas-actn-framework-05.txt
> >       Pages           : 41
> >       Date            : 2017-05-05
> >
> >     Abstract:
> >        Traffic Engineered networks have a variety of mechanisms to
> >        facilitate the separation of the data plane and control plane.
> They
> >        also have a range of management and provisioning protocols to
> >        configure and activate network resources.  These mechanisms
> >        represent key technologies for enabling flexible and dynamic
> >        networking.
> >
> >        Abstraction of network resources is a technique that can be
> applied
> >        to a single network domain or across multiple domains to create =
a
> >        single virtualized network that is under the control of a networ=
k
> >        operator or the customer of the operator that actually owns
> >        the network resources.
> >
> >        This document provides a framework for Abstraction and Control o=
f
> >        Traffic Engineered Networks (ACTN).
> >
> >
> >
> >     The IETF datatracker status page for this draft is:
> >     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
> >
> >     There are also htmlized versions available at:
> >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
> >
> > https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
> > 5
> >
> >     A diff from the previous version is available at:
> >
> > https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
> >
> >
> >     Please note that it may take a couple of minutes from the time of
> >     submission until the htmlized version and diff are available at
> tools.ietf.org.
> >
> >     Internet-Drafts are also available by anonymous FTP at:
> >     ftp://ftp.ietf.org/internet-drafts/
> >
> >     _______________________________________________
> >     Teas mailing list
> >     Teas@ietf.org
> >     https://www.ietf.org/mailman/listinfo/teas
> >
> >     _______________________________________________
> >     Teas mailing list
> >     Teas@ietf.org
> >     https://www.ietf.org/mailman/listinfo/teas
> >
> >
> > _______________________________________________
> > Teas mailing list
> > Teas@ietf.org
> > https://www.ietf.org/mailman/listinfo/teas
> >
> > _______________________________________________
> > Teas mailing list
> > Teas@ietf.org
> > https://www.ietf.org/mailman/listinfo/teas
> >
> > _______________________________________________
> > Teas mailing list
> > Teas@ietf.org
> > https://www.ietf.org/mailman/listinfo/teas
> >
>
>
> _______________________________________________
> Teas mailing list
> Teas@ietf.org
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
> Netslices mailing list
> Netslices@ietf.org
> https://www.ietf.org/mailman/listinfo/netslices
>
>
>

--001a113d3cccfa490805504485a9
Content-Type: text/html; charset="UTF-8"
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<div dir=3D"ltr">Hi Daniele,<div>thank you for your kind and thorough consi=
deration, glad we agree on the terminology. One minor, I think, note and th=
e answer to your question under GIM2&gt;&gt; tag in-line.</div><div><br></d=
iv><div>Regards,</div><div>Greg</div><div class=3D"gmail_extra"><br><div cl=
ass=3D"gmail_quote">On Wed, May 24, 2017 at 4:39 AM, Daniele Ceccarelli <sp=
an dir=3D"ltr">&lt;<a href=3D"mailto:daniele.ceccarelli@ericsson.com" targe=
t=3D"_blank">daniele.ceccarelli@ericsson.com</a>&gt;</span> wrote:<br><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #cc=
c solid;padding-left:1ex">





<div lang=3D"IT" link=3D"blue" vlink=3D"purple">
<div class=3D"m_544545598366900498WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif">Hi Greg,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:&quot;Ca=
libri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif">good points. Please see in line.<u><=
/u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif">Cheers<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif">Daniele=C2=A0
<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-=
family:&quot;Calibri&quot;,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><b><span lang=3D"EN-US"=
 style=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">From=
:</span></b><span lang=3D"EN-US" style=3D"font-size:11.0pt;font-family:&quo=
t;Calibri&quot;,sans-serif"> Greg Mirsky [mailto:<a href=3D"mailto:gregimir=
sky@gmail.com" target=3D"_blank">gregimirsky@gmail.com</a>]
<br>
<b>Sent:</b> sabato 20 maggio 2017 06:14<span class=3D""><br>
<b>To:</b> Daniele Ceccarelli &lt;<a href=3D"mailto:daniele.ceccarelli@eric=
sson.com" target=3D"_blank">daniele.ceccarelli@ericsson.<wbr>com</a>&gt;<br=
>
<b>Cc:</b> Leeyoung &lt;<a href=3D"mailto:leeyoung@huawei.com" target=3D"_b=
lank">leeyoung@huawei.com</a>&gt;; <a href=3D"mailto:teas@ietf.org" target=
=3D"_blank">teas@ietf.org</a>; <a href=3D"mailto:NetSlices@ietf.org" target=
=3D"_blank">NetSlices@ietf.org</a><br>
</span><b>Subject:</b> Re: [Netslices] [Teas] terminology discussion networ=
k slicing<u></u><u></u></span></p>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><u></u>=C2=A0<u></u></p=
>
<div><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">Hi Daniele,<u></u><u></=
u></p>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">I think that my interpr=
etation of network slice construct definition by 3GPP is slightly different=
. Please find my comments in-line tagged GIM&gt;&gt;. Some are to do with t=
erminology but, I believe, it is helpful to
 settle the dictionary and agree on the interpretation of terms.<u></u><u><=
/u></p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><u></u>=C2=A0<u></u></p=
>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">Regards,<u></u><u></u><=
/p>
</div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">Greg<u></u><u></u></p>
</div>
</span><div>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><u></u>=C2=A0<u></u></p=
>
<div><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">On Sat, May 20, 2017 at=
 4:18 AM, Daniele Ceccarelli &lt;<a href=3D"mailto:daniele.ceccarelli@erics=
son.com" target=3D"_blank">daniele.ceccarelli@ericsson.<wbr>com</a>&gt; wro=
te:<u></u><u></u></p>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">Hi Young, all,<br>
<br>
i agree with your conclusion but would like to clarify one thing that IMO g=
ot lost in the discussion since its beginning.<br>
<br>
The 3GPP definition says:<br>
&quot;A set of network functions and the resources for these network functi=
ons which are arranged and configured, forming a complete logical network t=
o meet certain network characteristics.&quot;<br>
<br>
This means that a network slice IS NOT a VPN or a TE Tunnel.<u></u><u></u><=
/p>
</blockquote>
</span><div><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">GIM&gt;&gt; My view is =
that VPN or a TE Tunnel could be part of instantiation of a network slice. =
There likely to be additional to TE parameters that may be considered, depe=
nding on the profile of the service requested
 the NS.<u></u><u></u></p>
</span><p class=3D"MsoNormal"><b><i><span lang=3D"EN-US" style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">[&gt;DC] I should have =
said =E2=80=9Cthis means that a network might not be JUST a VPN or a TE Tun=
nel=E2=80=9D and hence agree with you on the fact that the VPN or the TE Tu=
nnel
 could be part of the network slice. </span></i></b><span lang=3D"EN-US" st=
yle=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><u></u>=
<u></u></span></p>
</div><span class=3D"">
<div>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D"EN-US">=
=C2=A0<u></u><u></u></span></p>
</div>
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">A network slice is &quo=
t;something&quot; (netslices and 3GPP will define what this something is) t=
hat is composed by a &quot;piece&quot; in the RADIO domain, a &quot;piece&q=
uot; in the CLOUD domain, a &quot;piece&quot; in the TRANSPORT domain, plus
 possible other pieces in possible other domains.<u></u><u></u></p>
</blockquote>
</span><div><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">GIM&gt;&gt; I see separ=
ation of RAN and &quot;transport&quot; networks. Indeed, there will be e2e =
construct (will it be still referred as &quot;network slice&quot; or &quot;=
multi-domain NS&quot;) but it can be decomposed into domain-scope NSes.
 What you referred to as &quot;piece&quot; I consider as domain-scope NS.<u=
></u><u></u></p>
</span><p class=3D"MsoNormal"><b><i><span lang=3D"EN-US" style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">[&gt;DC] This is anothe=
r terminology issue. I agree on the separation between the RAN domain and t=
he =E2=80=9Ctransport=E2=80=9D domain (let=E2=80=99s keep on using the work=
 transport
 with quotation marks for the time being) and all the other domains in the =
network. IMO the network slice is the end to end entity that is built by a =
RAN slice plus a =E2=80=9Ctransport=E2=80=9D slice plus other potential sli=
ces. And the =E2=80=9Ctransport=E2=80=9D slice could be a VPN, a
 TE tunnel=E2=80=A6</span></i></b></p></div></div></div></div></div></div><=
/blockquote><div>GIM2&gt;&gt; If to a segment of a network slice instance i=
n a core network we refer as transport domain, then, as I understand, it&#3=
9;s peer may be not only RAN segment but, e.g., segment of an access networ=
k of another kind.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"ma=
rgin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"I=
T" link=3D"blue" vlink=3D"purple"><div class=3D"m_544545598366900498WordSec=
tion1"><div><div><div><div><p class=3D"MsoNormal"><span lang=3D"EN-US" styl=
e=3D"font-size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><u></u><u=
></u></span></p>
</div><span class=3D"">
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D"EN-US"><b=
r>
</span>The word &quot;transport&quot; can be misleading here since one coul=
d think of transport technologies (e.g. WDM, OTN), but what I&#39;m referri=
ng to as TRANSPORT DOMAIN is that part of the network that is used to carry=
 a packet between two other domains.<br>
In order to have a slice, that portion of the transport domain needs to be =
engineered, hence it is all about building a TE entity and stitching servic=
es to such entity. This is what is in the ACTN scope.<u></u><u></u></p>
</blockquote>
</span><div><span class=3D"">
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">GIM&gt;&gt; Should we u=
se Client-Server terms?=C2=A0<u></u><u></u></p>
</span><p class=3D"MsoNormal"><b><i><span lang=3D"EN-US" style=3D"font-size=
:11.0pt;font-family:&quot;Calibri&quot;,sans-serif">[&gt;DC] WRT what? Do y=
ou mean wrt the fact that the relationship between e.g. the RAN slice and t=
he =E2=80=9Ctransport=E2=80=9D slice could be client- server? I see it more
 a peering relationship. ON the other side WITHIN the =E2=80=9Ctransport=E2=
=80=9D slice you could have different layers with client-server relationshi=
p, that=E2=80=99s right.</span></i></b></p></div></div></div></div></div></=
div></blockquote><div>GIM2&gt;&gt; Yes, should have been clearer, it is the=
 latter.=C2=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0=
 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div lang=3D"IT" link=3D=
"blue" vlink=3D"purple"><div class=3D"m_544545598366900498WordSection1"><di=
v><div><div><div><p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-=
size:11.0pt;font-family:&quot;Calibri&quot;,sans-serif"><u></u><u></u></spa=
n></p>
</div><div><div class=3D"h5">
<blockquote style=3D"border:none;border-left:solid #cccccc 1.0pt;padding:0c=
m 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm">
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><span lang=3D"EN-US"><b=
r>
My very personal opinion is that whatever belongs to the transport domain b=
elongs to IETF (and is already being addressed), while the rest is a danger=
ous duplication of concepts standardized is other SDOs...but this is anothe=
r discussion that doesn&#39;t fit here.<br>
<br>
</span>BR<br>
<span class=3D"m_544545598366900498hoenzb"><span style=3D"color:#888888">Da=
niele</span></span><span style=3D"color:#888888"><br>
</span><br>
<br>
<span class=3D"m_544545598366900498im">-----Original Message-----</span><br=
>
<span class=3D"m_544545598366900498im">From: Teas [mailto:<a href=3D"mailto=
:teas-bounces@ietf.org" target=3D"_blank">teas-bounces@ietf.org</a>] On Beh=
alf Of Leeyoung</span><br>
<span class=3D"m_544545598366900498im">Sent: venerd=C3=AC 19 maggio 2017 15=
:15</span><br>
<span class=3D"m_544545598366900498im">To: <a href=3D"mailto:teas@ietf.org"=
 target=3D"_blank">teas@ietf.org</a></span><br>
<span class=3D"m_544545598366900498im">Cc: <a href=3D"mailto:NetSlices@ietf=
.org" target=3D"_blank">NetSlices@ietf.org</a></span><u></u><u></u></p>
<div>
<div>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt">Subject: Re: [Teas] ter=
minology discussion network slicing<br>
<br>
Hi,<br>
<br>
Lou is right. There is a dedicated email list for the discussion of &quot;n=
etwork slicing (cc&#39;ed)&quot; and the discussion about what that term me=
ans should be held on that list.<br>
<br>
We have used similar language in draft-ietf-teas-actn-framework right from =
the<br>
00 version. Recent changes have been an attempt to clarify what the termino=
logy means in the context of ACTN. We are not trying to define or redefine =
&quot;network slicing&quot; in the ACTN document, but are trying to make it=
 clear how ACTN works.<br>
<br>
Therefore I propose the following resolution:<br>
<br>
1. All discussion of the general applicability and definition of &quot;netw=
ork slicing&quot; is held on the netslices mailing list.<br>
<br>
2. We adopt Adrian&#39;s suggestion to explain that the scope of the defini=
tion of the terms used in the ACTN framework is limited to ACTN. That means=
 effectively that if there are components of a wider definition of network =
slicing that are not supported by ACTN,
 that will be OK.<br>
<br>
I propose to post an updated version in the next few days and I believe tha=
t will allow this draft to move ahead without being blocked by the discussi=
on in netslices. Once the IETF has a stable definition of network slicing w=
e can return and see how ACTN is
 applicable to that definition an whether more wok is need (in a separate d=
raft).<br>
<br>
Thanks,<br>
Young<br>
<br>
-----Original Message-----<br>
From: Lou Berger [mailto:<a href=3D"mailto:lberger@labn.net" target=3D"_bla=
nk">lberger@labn.net</a>]<br>
Sent: Tuesday, May 16, 2017 8:35 AM<br>
To: Igor Bryskin &lt;<a href=3D"mailto:Igor.Bryskin@huawei.com" target=3D"_=
blank">Igor.Bryskin@huawei.com</a>&gt;; Belotti, Sergio (Nokia - IT/Vimerca=
te) &lt;<a href=3D"mailto:sergio.belotti@nokia.com" target=3D"_blank">sergi=
o.belotti@nokia.com</a>&gt;; Gert Grammel &lt;<a href=3D"mailto:ggrammel@ju=
niper.net" target=3D"_blank">ggrammel@juniper.net</a>&gt;;
 Leeyoung &lt;<a href=3D"mailto:leeyoung@huawei.com" target=3D"_blank">leey=
oung@huawei.com</a>&gt;; <a href=3D"mailto:teas@ietf.org" target=3D"_blank"=
>
teas@ietf.org</a>; <a href=3D"mailto:adrian@olddog.co.uk" target=3D"_blank"=
>adrian@olddog.co.uk</a><br>
Subject: Re: [Teas] terminology discussion network slicing<br>
<br>
Perhaps it&#39;s time to bring the discussion to the slicing list and repor=
t back their reaponse....<br>
<br>
Lou<br>
<br>
<br>
On May 16, 2017 8:31:19 AM Igor Bryskin &lt;<a href=3D"mailto:Igor.Bryskin@=
huawei.com" target=3D"_blank">Igor.Bryskin@huawei.com</a>&gt; wrote:<br>
<br>
&gt; Hi Sergio,<br>
&gt;<br>
&gt; I would also like to hear more from network slicing experts.<br>
&gt;<br>
&gt; My understanding is that the difference in the separation (in terms of=
<br>
&gt; control and data planes, security, etc.). For example, traditional BGP=
<br>
&gt; based L3 VPNs (that use provider&#39;s common control plane for their<=
br>
&gt; management and IP/MPLS TE tunnels to inter-connect their PEs) will<br>
&gt; probably not be able guarantee for the clients msec range connectivity=
<br>
&gt; setup times required by 5g, while provided by the same provider fully<=
br>
&gt; separated/genuinely private IP/MPLS networks (that do not share<br>
&gt; IP/MPLS control plane and infrastructure, whose network topology is<br=
>
&gt; supported by separate L0/L1 connections) hopefully will be able to<br>
&gt; provide such guarantees. Therefore, I define layer network slices as<b=
r>
&gt; dynamically managed fully isolated in control and data planes private<=
br>
&gt; TE layer networks, which may share one or more underlying server layer=
 networks.<br>
&gt;<br>
&gt;<br>
&gt; Cheers,<br>
&gt; Igor<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt; -----Original Message-----<br>
&gt; From: Teas [mailto:<a href=3D"mailto:teas-bounces@ietf.org" target=3D"=
_blank">teas-bounces@ietf.org</a>] On Behalf Of Belotti, Sergio<br>
&gt; (Nokia - IT/Vimercate)<br>
&gt; Sent: Tuesday, May 16, 2017 6:08 AM<br>
&gt; To: Gert Grammel; Leeyoung; <a href=3D"mailto:teas@ietf.org" target=3D=
"_blank">teas@ietf.org</a>; <a href=3D"mailto:adrian@olddog.co.uk" target=
=3D"_blank">
adrian@olddog.co.uk</a><br>
&gt; Subject: Re: [Teas] terminology discussion network slicing<br>
&gt;<br>
&gt; Hi Gert,<br>
&gt;<br>
&gt; &quot;Thinking a bit about it I came to the point where &quot;VPN&quot=
; and &quot;network<br>
&gt; slices&quot; seem to describe the same entity or at least a &quot;netw=
ork slice&quot;<br>
&gt; being a VPN of VPNs?&quot;<br>
&gt;<br>
&gt; I share completely your conclusion , I&#39;d like if someone can expla=
in<br>
&gt; if a difference really exists .<br>
&gt;<br>
&gt; Thanks<br>
&gt; Sergio<br>
&gt;<br>
&gt;<br>
&gt; -----Original Message-----<br>
&gt; From: Teas [mailto:<a href=3D"mailto:teas-bounces@ietf.org" target=3D"=
_blank">teas-bounces@ietf.org</a>] On Behalf Of Gert Grammel<br>
&gt; Sent: Monday, May 15, 2017 7:02 PM<br>
&gt; To: Leeyoung &lt;<a href=3D"mailto:leeyoung@huawei.com" target=3D"_bla=
nk">leeyoung@huawei.com</a>&gt;; <a href=3D"mailto:teas@ietf.org" target=3D=
"_blank">
teas@ietf.org</a>; <a href=3D"mailto:adrian@olddog.co.uk" target=3D"_blank"=
>adrian@olddog.co.uk</a><br>
&gt; Subject: Re: [Teas] terminology discussion network slicing<br>
&gt;<br>
&gt; Leeyoung,<br>
&gt;<br>
&gt; Thank you for taking a stab on this. Usually when getting to a<br>
&gt; definition, I try to establish what kind of existing constructs would<=
br>
&gt; fall under the definition. If my understanding is correct, the<br>
&gt; following list of constructs would all satisfy the definition somehow.=
<br>
&gt; - A TDM network with a p2p TDM connection<br>
&gt; - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)<br>
&gt; - An MPLS LSP using a traffic engineered IP network<br>
&gt; - A L2VPN using a traffic engineered MPLS network<br>
&gt; - A L3VPN using a traffic engineered IP network<br>
&gt; - A TCP connection using a traffic engineered IP network<br>
&gt; - Different QoS classes in an IP network<br>
&gt;<br>
&gt; Thinking a bit about it I came to the point where &quot;VPN&quot; and =
&quot;network<br>
&gt; slices&quot; seem to describe the same entity or at least a &quot;netw=
ork slice&quot;<br>
&gt; being a VPN of VPNs?<br>
&gt;<br>
&gt; Gert<br>
&gt;<br>
&gt;<br>
&gt; On 2017-05-17, 16:44, &quot;Teas on behalf of Leeyoung&quot;<br>
&gt; &lt;<a href=3D"mailto:teas-bounces@ietf.org" target=3D"_blank">teas-bo=
unces@ietf.org</a> on behalf of <a href=3D"mailto:leeyoung@huawei.com" targ=
et=3D"_blank">
leeyoung@huawei.com</a>&gt; wrote:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Hi Adrian and others,<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0We&#39;d like cross check with you on some terminol=
ogy we introduced newly. Any<br>
&gt;=C2=A0 =C2=A0 =C2=A0comment on these terms will be greatly appreciated.=
<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0We introduced &#39;network slicing&#39; as follows:=
<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Network slicing is a co=
llection of resources<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0that are used to establ=
ish logically dedicated virtual networks<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0over TE networks. It al=
lows a network provider to provide<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0dedicated virtual netwo=
rks for application/customer over a<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0common network infrastr=
ucture. The logically dedicated<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0resources are a part of=
 the larger common network<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0infrastructures that ar=
e shared among various network slice<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0instances which are the=
 end-to-end realization of network<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0slicing, consisting of =
the combination of physically or<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0logically dedicated res=
ources.<br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Thanks.<br>
&gt;=C2=A0 =C2=A0 =C2=A0Young and Daniele<br>
&gt;=C2=A0 =C2=A0 =C2=A0-----Original Message-----<br>
&gt;=C2=A0 =C2=A0 =C2=A0From: Leeyoung<br>
&gt;=C2=A0 =C2=A0 =C2=A0Sent: Friday, May 05, 2017 1:41 PM<br>
&gt;=C2=A0 =C2=A0 =C2=A0To: <a href=3D"mailto:teas@ietf.org" target=3D"_bla=
nk">teas@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Subject: RE: [Teas] I-D Action:<br>
&gt; draft-ietf-teas-actn-<wbr>framework-05.txt<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Hi,<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0This update is intended to incorporate the comments=
 from the last WG<br>
&gt;=C2=A0 =C2=A0 =C2=A0meeting and any pending issues. We also have taken =
the global editorial<br>
&gt;=C2=A0 =C2=A0 =C2=A0changes to make it consistent through the document.=
 Major changes are:<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Inclusion of &quot;network slicing&quot; definiti=
on from ACTN perspective (in the<br>
&gt;=C2=A0 =C2=A0 =C2=A0terminology section)<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Added virtual network service (VNS) section (Sect=
ion 3) to define types<br>
&gt;=C2=A0 =C2=A0 =C2=A0of VNS.<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Incorporated &quot;orchestration&quot; (service/n=
etwork) mapping to ACTN<br>
&gt;=C2=A0 =C2=A0 =C2=A0architecture (See Section 5.2)<br>
&gt;=C2=A0 =C2=A0 =C2=A0- Created a new section 6 (Topology Abstraction Met=
hod) where we imported<br>
&gt;=C2=A0 =C2=A0 =C2=A0some texts from ACTN abstraction method<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/draft-lee-te=
as-actn-abstraction-01" target=3D"_blank">https://tools.ietf.org/html/<wbr>=
draft-lee-teas-actn-<wbr>abstraction-01</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0- Added Appendices A &amp; B to discuss example dep=
loyment scenarios such as<br>
&gt;=C2=A0 =C2=A0 =C2=A0example of MDSC and PNC functions integrated in Ser=
vice/Network<br>
&gt;=C2=A0 =C2=A0 =C2=A0Orchestrator (Appendix A) and example of IP + Optic=
al network with L3VPN<br>
&gt;=C2=A0 =C2=A0 =C2=A0service (Appendix B)<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0In regard to ACTN abstraction method draft, we are =
going to keep it as a<br>
&gt;=C2=A0 =C2=A0 =C2=A0separate draft and use this document to elaborate o=
ther aspects not<br>
&gt;=C2=A0 =C2=A0 =C2=A0imported to the framework document.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The following diff pointer will help you see the ch=
anges with this revision:<br>
&gt;<br>
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-fr=
amework-05" target=3D"_blank">
https://www.ietf.org/rfcdiff?<wbr>url2=3Ddraft-ietf-teas-actn-<wbr>framewor=
k-05</a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The co-authors believe that the document is ready f=
or WG LC. Any<br>
&gt;=C2=A0 =C2=A0 =C2=A0changes/comments will be appreciated.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Thanks &amp; Best regards,<br>
&gt;=C2=A0 =C2=A0 =C2=A0Young &amp; Daniele (on behalf of other co-authors/=
contributors)<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0-----Original Message-----<br>
&gt;=C2=A0 =C2=A0 =C2=A0From: Teas [mailto:<a href=3D"mailto:teas-bounces@i=
etf.org" target=3D"_blank">teas-bounces@ietf.org</a>] On Behalf Of
<a href=3D"mailto:internet-drafts@ietf.org" target=3D"_blank">internet-draf=
ts@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Sent: Friday, May 05, 2017 10:41 AM<br>
&gt;=C2=A0 =C2=A0 =C2=A0To: <a href=3D"mailto:i-d-announce@ietf.org" target=
=3D"_blank">i-d-announce@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Cc: <a href=3D"mailto:teas@ietf.org" target=3D"_bla=
nk">teas@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0Subject: [Teas] I-D Action: draft-ietf-teas-actn-<w=
br>framework-05.txt<br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0A New Internet-Draft is available from the on-line =
Internet-Drafts directories.<br>
&gt;=C2=A0 =C2=A0 =C2=A0This draft is a work item of the Traffic Engineerin=
g Architecture and<br>
&gt;=C2=A0 =C2=A0 =C2=A0Signaling of the IETF.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Title=C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0: Framework for Abstraction and Control of Traffic<=
br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Engineered Networks<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Authors=C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0: Daniele Ceccarelli<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Young Lee<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Filename=C2=A0 =C2=A0 =C2=A0 =C2=A0 : draft-=
ietf-teas-actn-<wbr>framework-05.txt<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Pages=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0: 41<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0Date=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 : 2017-05-05<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Abstract:<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Traffic Engineered networks have a variety =
of mechanisms to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 facilitate the separation of the data plane=
 and control plane. They<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 also have a range of management and provisi=
oning protocols to<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 configure and activate network resources.=
=C2=A0 These mechanisms<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 represent key technologies for enabling fle=
xible and dynamic<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 networking.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Abstraction of network resources is a techn=
ique that can be applied<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 to a single network domain or across multip=
le domains to create a<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 single virtualized network that is under th=
e control of a network<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 operator or the customer of the operator th=
at actually owns<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 the network resources.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 This document provides a framework for Abst=
raction and Control of<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 Traffic Engineered Networks (ACTN).<br>
&gt;<br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0The IETF datatracker status page for this draft is:=
<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://datatracker.ietf.org/doc/draft-i=
etf-teas-actn-framework/" target=3D"_blank">https://datatracker.ietf.org/<w=
br>doc/draft-ietf-teas-actn-<wbr>framework/</a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0There are also htmlized versions available at:<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://tools.ietf.org/html/draft-ietf-t=
eas-actn-framework-05" target=3D"_blank">https://tools.ietf.org/html/<wbr>d=
raft-ietf-teas-actn-<wbr>framework-05</a><br>
&gt;<br>
&gt; <a href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-=
framework-0" target=3D"_blank">
https://datatracker.ietf.org/<wbr>doc/html/draft-ietf-teas-actn-<wbr>framew=
ork-0</a><br>
&gt; 5<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0A diff from the previous version is available at:<b=
r>
&gt;<br>
&gt; <a href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-fr=
amework-05" target=3D"_blank">
https://www.ietf.org/rfcdiff?<wbr>url2=3Ddraft-ietf-teas-actn-<wbr>framewor=
k-05</a><br>
&gt;<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Please note that it may take a couple of minutes fr=
om the time of<br>
&gt;=C2=A0 =C2=A0 =C2=A0submission until the htmlized version and diff are =
available at <a href=3D"http://tools.ietf.org" target=3D"_blank">
tools.ietf.org</a>.<br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0Internet-Drafts are also available by anonymous FTP=
 at:<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"ftp://ftp.ietf.org/internet-drafts/" tar=
get=3D"_blank">ftp://ftp.ietf.org/internet-<wbr>drafts/</a><br>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0_____________________________<wbr>_________________=
_<br>
&gt;=C2=A0 =C2=A0 =C2=A0Teas mailing list<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"mailto:Teas@ietf.org" target=3D"_blank">=
Teas@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.org/mailman/listinfo/te=
as" target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/teas</a><b=
r>
&gt;<br>
&gt;=C2=A0 =C2=A0 =C2=A0_____________________________<wbr>_________________=
_<br>
&gt;=C2=A0 =C2=A0 =C2=A0Teas mailing list<br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"mailto:Teas@ietf.org" target=3D"_blank">=
Teas@ietf.org</a><br>
&gt;=C2=A0 =C2=A0 =C2=A0<a href=3D"https://www.ietf.org/mailman/listinfo/te=
as" target=3D"_blank">https://www.ietf.org/mailman/<wbr>listinfo/teas</a><b=
r>
&gt;<br>
&gt;<br>
&gt; ______________________________<wbr>_________________<br>
&gt; Teas mailing list<br>
&gt; <a href=3D"mailto:Teas@ietf.org" target=3D"_blank">Teas@ietf.org</a><b=
r>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/teas" target=3D"_blan=
k">https://www.ietf.org/mailman/<wbr>listinfo/teas</a><br>
&gt;<br>
&gt; ______________________________<wbr>_________________<br>
&gt; Teas mailing list<br>
&gt; <a href=3D"mailto:Teas@ietf.org" target=3D"_blank">Teas@ietf.org</a><b=
r>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/teas" target=3D"_blan=
k">https://www.ietf.org/mailman/<wbr>listinfo/teas</a><br>
&gt;<br>
&gt; ______________________________<wbr>_________________<br>
&gt; Teas mailing list<br>
&gt; <a href=3D"mailto:Teas@ietf.org" target=3D"_blank">Teas@ietf.org</a><b=
r>
&gt; <a href=3D"https://www.ietf.org/mailman/listinfo/teas" target=3D"_blan=
k">https://www.ietf.org/mailman/<wbr>listinfo/teas</a><br>
&gt;<br>
<br>
<br>
______________________________<wbr>_________________<br>
Teas mailing list<br>
<a href=3D"mailto:Teas@ietf.org" target=3D"_blank">Teas@ietf.org</a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/teas" target=3D"_blank">ht=
tps://www.ietf.org/mailman/<wbr>listinfo/teas</a><br>
<br>
______________________________<wbr>_________________<br>
Netslices mailing list<br>
<a href=3D"mailto:Netslices@ietf.org" target=3D"_blank">Netslices@ietf.org<=
/a><br>
<a href=3D"https://www.ietf.org/mailman/listinfo/netslices" target=3D"_blan=
k">https://www.ietf.org/mailman/<wbr>listinfo/netslices</a><u></u><u></u></=
p>
</div>
</div>
</blockquote>
</div></div></div>
<p class=3D"MsoNormal" style=3D"margin-left:35.4pt"><u></u>=C2=A0<u></u></p=
>
</div>
</div>
</div>
</div>

</blockquote></div><br></div></div>

--001a113d3cccfa490805504485a9--


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From: Igor Bryskin <Igor.Bryskin@huawei.com>
To: Jeff Tantsura <jefftant.ietf@gmail.com>, "qiangli (D)" <qiangli3@huawei.com>, Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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Thread-Topic: [Teas] terminology discussion  network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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Reply-To: <sebastian.thalanany@ieee.org>
From: "sebastian" <comscape@gmail.com>
To: "'Greg Mirsky'" <gregimirsky@gmail.com>
Cc: "'Leeyoung'" <leeyoung@huawei.com>, <NetSlices@ietf.org>, <teas@ietf.org>,  "'Daniele Ceccarelli'" <daniele.ceccarelli@ericsson.com>
References: <7AEB3D6833318045B4AE71C2C87E8E172B2CA60E@SJCEML702-CHM.china.huawei.com> <97EE7243-CB44-40AD-B02D-98E07D9C79F2@juniper.net> <DB3PR07MB0588EA2B00C389E762D8C59F91E60@DB3PR07MB0588.eurprd07.prod.outlook.com> <0C72C38E7EBC34499E8A9E7DD00786390993DBF8@SJCEML702-CHM.china.huawei.com> <15c1177e0c0.27d3.9b4188e636579690ba6c69f2c8a0f1fd@labn.net> <7AEB3D6833318045B4AE71C2C87E8E172B2CC48E@SJCEML702-CHM.china.huawei.com> <AM2PR07MB099483A94CDDD068D0F86CD5F0E50@AM2PR07MB0994.eurprd07.prod.outlook.com> <CA+RyBmXjfC9fQGEEW-qE6oQyMv7t9jjdRrVRW37urdtsfTXmdQ@mail.gmail.com> <DB5PR07MB0999DC0C4B74C7B36E57674DF0F90@DB5PR07MB0999.eurprd07.prod.outlook.com> <CA+RyBmUx1aP__uP_mVrjumBo2423=fjAUbiNmtc1cKo2Ah15FQ@mail.gmail.com>
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netslices/ROaaFEs6l1Bxz4ciPgZiPPaopHA>
Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Hello, Greg,

=20

Concur with the following generalized definition of a network slice:

=20

"A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."

=20

The existence certain artifacts, such as tunnels or other attributes =
that in unison provide some capability, does not alter the notion that =
it is still some arrangement of resources (e.g. functions, storage, =
spectrum etc.)

=20

The scope of a network slice must also be extensible to any set of =
endpoints (e.g. orchestration across multiple administrative domains).

=20

Many thanks.

-Sebastian

=20

From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Greg =
Mirsky
Sent: Wednesday, May 24, 2017 7:49 AM
To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
Cc: Leeyoung <leeyoung@huawei.com>; NetSlices@ietf.org; teas@ietf.org
Subject: Re: [Netslices] [Teas] terminology discussion network slicing

=20

Hi Daniele,

thank you for your kind and thorough consideration, glad we agree on the =
terminology. One minor, I think, note and the answer to your question =
under GIM2>> tag in-line.

=20

Regards,

Greg

=20

On Wed, May 24, 2017 at 4:39 AM, Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com =
<mailto:daniele.ceccarelli@ericsson.com> > wrote:

Hi Greg,

=20

good points. Please see in line.

=20

Cheers

Daniele =20

=20

From: Greg Mirsky [mailto:gregimirsky@gmail.com =
<mailto:gregimirsky@gmail.com> ]=20
Sent: sabato 20 maggio 2017 06:14
To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com =
<mailto:daniele.ceccarelli@ericsson.com> >
Cc: Leeyoung <leeyoung@huawei.com <mailto:leeyoung@huawei.com> >; =
teas@ietf.org <mailto:teas@ietf.org> ; NetSlices@ietf.org =
<mailto:NetSlices@ietf.org>=20
Subject: Re: [Netslices] [Teas] terminology discussion network slicing

=20

Hi Daniele,

I think that my interpretation of network slice construct definition by =
3GPP is slightly different. Please find my comments in-line tagged =
GIM>>. Some are to do with terminology but, I believe, it is helpful to =
settle the dictionary and agree on the interpretation of terms.

=20

Regards,

Greg

=20

On Sat, May 20, 2017 at 4:18 AM, Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com =
<mailto:daniele.ceccarelli@ericsson.com> > wrote:

Hi Young, all,

i agree with your conclusion but would like to clarify one thing that =
IMO got lost in the discussion since its beginning.

The 3GPP definition says:
"A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."

This means that a network slice IS NOT a VPN or a TE Tunnel.

GIM>> My view is that VPN or a TE Tunnel could be part of instantiation =
of a network slice. There likely to be additional to TE parameters that =
may be considered, depending on the profile of the service requested the =
NS.

[>DC] I should have said =E2=80=9Cthis means that a network might not be =
JUST a VPN or a TE Tunnel=E2=80=9D and hence agree with you on the fact =
that the VPN or the TE Tunnel could be part of the network slice.=20

=20

A network slice is "something" (netslices and 3GPP will define what this =
something is) that is composed by a "piece" in the RADIO domain, a =
"piece" in the CLOUD domain, a "piece" in the TRANSPORT domain, plus =
possible other pieces in possible other domains.

GIM>> I see separation of RAN and "transport" networks. Indeed, there =
will be e2e construct (will it be still referred as "network slice" or =
"multi-domain NS") but it can be decomposed into domain-scope NSes. What =
you referred to as "piece" I consider as domain-scope NS.

[>DC] This is another terminology issue. I agree on the separation =
between the RAN domain and the =E2=80=9Ctransport=E2=80=9D domain =
(let=E2=80=99s keep on using the work transport with quotation marks for =
the time being) and all the other domains in the network. IMO the =
network slice is the end to end entity that is built by a RAN slice plus =
a =E2=80=9Ctransport=E2=80=9D slice plus other potential slices. And the =
=E2=80=9Ctransport=E2=80=9D slice could be a VPN, a TE tunnel=E2=80=A6

GIM2>> If to a segment of a network slice instance in a core network we =
refer as transport domain, then, as I understand, it's peer may be not =
only RAN segment but, e.g., segment of an access network of another =
kind.=20


The word "transport" can be misleading here since one could think of =
transport technologies (e.g. WDM, OTN), but what I'm referring to as =
TRANSPORT DOMAIN is that part of the network that is used to carry a =
packet between two other domains.
In order to have a slice, that portion of the transport domain needs to =
be engineered, hence it is all about building a TE entity and stitching =
services to such entity. This is what is in the ACTN scope.

GIM>> Should we use Client-Server terms?=20

[>DC] WRT what? Do you mean wrt the fact that the relationship between =
e.g. the RAN slice and the =E2=80=9Ctransport=E2=80=9D slice could be =
client- server? I see it more a peering relationship. ON the other side =
WITHIN the =E2=80=9Ctransport=E2=80=9D slice you could have different =
layers with client-server relationship, that=E2=80=99s right.

GIM2>> Yes, should have been clearer, it is the latter.=20


My very personal opinion is that whatever belongs to the transport =
domain belongs to IETF (and is already being addressed), while the rest =
is a dangerous duplication of concepts standardized is other SDOs...but =
this is another discussion that doesn't fit here.

BR
Daniele


-----Original Message-----
From: Teas [mailto:teas-bounces@ietf.org <mailto:teas-bounces@ietf.org> =
] On Behalf Of Leeyoung
Sent: venerd=C3=AC 19 maggio 2017 15:15
To: teas@ietf.org <mailto:teas@ietf.org>=20
Cc: NetSlices@ietf.org <mailto:NetSlices@ietf.org>=20

Subject: Re: [Teas] terminology discussion network slicing

Hi,

Lou is right. There is a dedicated email list for the discussion of =
"network slicing (cc'ed)" and the discussion about what that term means =
should be held on that list.

We have used similar language in draft-ietf-teas-actn-framework right =
from the
00 version. Recent changes have been an attempt to clarify what the =
terminology means in the context of ACTN. We are not trying to define or =
redefine "network slicing" in the ACTN document, but are trying to make =
it clear how ACTN works.

Therefore I propose the following resolution:

1. All discussion of the general applicability and definition of =
"network slicing" is held on the netslices mailing list.

2. We adopt Adrian's suggestion to explain that the scope of the =
definition of the terms used in the ACTN framework is limited to ACTN. =
That means effectively that if there are components of a wider =
definition of network slicing that are not supported by ACTN, that will =
be OK.

I propose to post an updated version in the next few days and I believe =
that will allow this draft to move ahead without being blocked by the =
discussion in netslices. Once the IETF has a stable definition of =
network slicing we can return and see how ACTN is applicable to that =
definition an whether more wok is need (in a separate draft).

Thanks,
Young

-----Original Message-----
From: Lou Berger [mailto:lberger@labn.net <mailto:lberger@labn.net> ]
Sent: Tuesday, May 16, 2017 8:35 AM
To: Igor Bryskin <Igor.Bryskin@huawei.com =
<mailto:Igor.Bryskin@huawei.com> >; Belotti, Sergio (Nokia - =
IT/Vimercate) <sergio.belotti@nokia.com =
<mailto:sergio.belotti@nokia.com> >; Gert Grammel <ggrammel@juniper.net =
<mailto:ggrammel@juniper.net> >; Leeyoung <leeyoung@huawei.com =
<mailto:leeyoung@huawei.com> >; teas@ietf.org <mailto:teas@ietf.org> ; =
adrian@olddog.co.uk <mailto:adrian@olddog.co.uk>=20
Subject: Re: [Teas] terminology discussion network slicing

Perhaps it's time to bring the discussion to the slicing list and report =
back their reaponse....

Lou


On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com =
<mailto:Igor.Bryskin@huawei.com> > wrote:

> Hi Sergio,
>
> I would also like to hear more from network slicing experts.
>
> My understanding is that the difference in the separation (in terms of
> control and data planes, security, etc.). For example, traditional BGP
> based L3 VPNs (that use provider's common control plane for their
> management and IP/MPLS TE tunnels to inter-connect their PEs) will
> probably not be able guarantee for the clients msec range connectivity
> setup times required by 5g, while provided by the same provider fully
> separated/genuinely private IP/MPLS networks (that do not share
> IP/MPLS control plane and infrastructure, whose network topology is
> supported by separate L0/L1 connections) hopefully will be able to
> provide such guarantees. Therefore, I define layer network slices as
> dynamically managed fully isolated in control and data planes private
> TE layer networks, which may share one or more underlying server layer =
networks.
>
>
> Cheers,
> Igor
>
>
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org =
<mailto:teas-bounces@ietf.org> ] On Behalf Of Belotti, Sergio
> (Nokia - IT/Vimercate)
> Sent: Tuesday, May 16, 2017 6:08 AM
> To: Gert Grammel; Leeyoung; teas@ietf.org <mailto:teas@ietf.org> ; =
adrian@olddog.co.uk <mailto:adrian@olddog.co.uk>=20
> Subject: Re: [Teas] terminology discussion network slicing
>
> Hi Gert,
>
> "Thinking a bit about it I came to the point where "VPN" and "network
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?"
>
> I share completely your conclusion , I'd like if someone can explain
> if a difference really exists .
>
> Thanks
> Sergio
>
>
> -----Original Message-----
> From: Teas [mailto:teas-bounces@ietf.org =
<mailto:teas-bounces@ietf.org> ] On Behalf Of Gert Grammel
> Sent: Monday, May 15, 2017 7:02 PM
> To: Leeyoung <leeyoung@huawei.com <mailto:leeyoung@huawei.com> >; =
teas@ietf.org <mailto:teas@ietf.org> ; adrian@olddog.co.uk =
<mailto:adrian@olddog.co.uk>=20
> Subject: Re: [Teas] terminology discussion network slicing
>
> Leeyoung,
>
> Thank you for taking a stab on this. Usually when getting to a
> definition, I try to establish what kind of existing constructs would
> fall under the definition. If my understanding is correct, the
> following list of constructs would all satisfy the definition somehow.
> - A TDM network with a p2p TDM connection
> - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
> - An MPLS LSP using a traffic engineered IP network
> - A L2VPN using a traffic engineered MPLS network
> - A L3VPN using a traffic engineered IP network
> - A TCP connection using a traffic engineered IP network
> - Different QoS classes in an IP network
>
> Thinking a bit about it I came to the point where "VPN" and "network
> slices" seem to describe the same entity or at least a "network slice"
> being a VPN of VPNs?
>
> Gert
>
>
> On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
> <teas-bounces@ietf.org <mailto:teas-bounces@ietf.org>  on behalf of =
leeyoung@huawei.com <mailto:leeyoung@huawei.com> > wrote:
>
>     Hi Adrian and others,
>
>     We'd like cross check with you on some terminology we introduced =
newly. Any
>     comment on these terms will be greatly appreciated.
>
>     We introduced 'network slicing' as follows:
>
>             Network slicing is a collection of resources
>             that are used to establish logically dedicated virtual =
networks
>             over TE networks. It allows a network provider to provide
>             dedicated virtual networks for application/customer over a
>             common network infrastructure. The logically dedicated
>             resources are a part of the larger common network
>             infrastructures that are shared among various network =
slice
>             instances which are the end-to-end realization of network
>             slicing, consisting of the combination of physically or
>             logically dedicated resources.
>
>
>     Thanks.
>     Young and Daniele
>     -----Original Message-----
>     From: Leeyoung
>     Sent: Friday, May 05, 2017 1:41 PM
>     To: teas@ietf.org <mailto:teas@ietf.org>=20
>     Subject: RE: [Teas] I-D Action:
> draft-ietf-teas-actn-framework-05.txt
>
>     Hi,
>
>     This update is intended to incorporate the comments from the last =
WG
>     meeting and any pending issues. We also have taken the global =
editorial
>     changes to make it consistent through the document. Major changes =
are:
>
>     - Inclusion of "network slicing" definition from ACTN perspective =
(in the
>     terminology section)
>     - Added virtual network service (VNS) section (Section 3) to =
define types
>     of VNS.
>     - Incorporated "orchestration" (service/network) mapping to ACTN
>     architecture (See Section 5.2)
>     - Created a new section 6 (Topology Abstraction Method) where we =
imported
>     some texts from ACTN abstraction method
>     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>     - Added Appendices A & B to discuss example deployment scenarios =
such as
>     example of MDSC and PNC functions integrated in Service/Network
>     Orchestrator (Appendix A) and example of IP + Optical network with =
L3VPN
>     service (Appendix B)
>
>     In regard to ACTN abstraction method draft, we are going to keep =
it as a
>     separate draft and use this document to elaborate other aspects =
not
>     imported to the framework document.
>
>     The following diff pointer will help you see the changes with this =
revision:
>
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>     The co-authors believe that the document is ready for WG LC. Any
>     changes/comments will be appreciated.
>
>     Thanks & Best regards,
>     Young & Daniele (on behalf of other co-authors/contributors)
>
>     -----Original Message-----
>     From: Teas [mailto:teas-bounces@ietf.org =
<mailto:teas-bounces@ietf.org> ] On Behalf Of internet-drafts@ietf.org =
<mailto:internet-drafts@ietf.org>=20
>     Sent: Friday, May 05, 2017 10:41 AM
>     To: i-d-announce@ietf.org <mailto:i-d-announce@ietf.org>=20
>     Cc: teas@ietf.org <mailto:teas@ietf.org>=20
>     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>
>
>     A New Internet-Draft is available from the on-line Internet-Drafts =
directories.
>     This draft is a work item of the Traffic Engineering Architecture =
and
>     Signaling of the IETF.
>
>             Title           : Framework for Abstraction and Control of =
Traffic
>             Engineered Networks
>             Authors         : Daniele Ceccarelli
>                               Young Lee
>       Filename        : draft-ietf-teas-actn-framework-05.txt
>       Pages           : 41
>       Date            : 2017-05-05
>
>     Abstract:
>        Traffic Engineered networks have a variety of mechanisms to
>        facilitate the separation of the data plane and control plane. =
They
>        also have a range of management and provisioning protocols to
>        configure and activate network resources.  These mechanisms
>        represent key technologies for enabling flexible and dynamic
>        networking.
>
>        Abstraction of network resources is a technique that can be =
applied
>        to a single network domain or across multiple domains to create =
a
>        single virtualized network that is under the control of a =
network
>        operator or the customer of the operator that actually owns
>        the network resources.
>
>        This document provides a framework for Abstraction and Control =
of
>        Traffic Engineered Networks (ACTN).
>
>
>
>     The IETF datatracker status page for this draft is:
>     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>
>     There are also htmlized versions available at:
>     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>
> https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
> 5
>
>     A diff from the previous version is available at:
>
> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>
>
>     Please note that it may take a couple of minutes from the time of
>     submission until the htmlized version and diff are available at =
tools.ietf.org <http://tools.ietf.org> .
>
>     Internet-Drafts are also available by anonymous FTP at:
>     ftp://ftp.ietf.org/internet-drafts/
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org <mailto:Teas@ietf.org>=20
>     https://www.ietf.org/mailman/listinfo/teas
>
>     _______________________________________________
>     Teas mailing list
>     Teas@ietf.org <mailto:Teas@ietf.org>=20
>     https://www.ietf.org/mailman/listinfo/teas
>
>
> _______________________________________________
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> Teas@ietf.org <mailto:Teas@ietf.org>=20
> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
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> https://www.ietf.org/mailman/listinfo/teas
>
> _______________________________________________
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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-US link=3Dblue =
vlink=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'>Hello, Greg,<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'>Concur with the following generalized =
definition of a network slice:<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'>&quot;A set of network functions and the =
resources for these network functions which are arranged and configured, =
forming a complete logical network to meet certain network =
characteristics.&quot;<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'>The existence certain artifacts, such as =
tunnels or other attributes that in unison provide some capability, does =
not alter the notion that it is still some arrangement of resources =
(e.g. functions, storage, spectrum etc.)<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'>The scope of a network slice must also be =
extensible to any set of endpoints (e.g. orchestration across multiple =
administrative domains).<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'><o:p>&nbsp;</o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'>Many thanks.<o:p></o:p></span></p><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'>-Sebastian<o:p></o:p></span></p><p =
class=3DMsoNormal><a name=3D"_MailEndCompose"><span =
style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif;color:#3580E3'><o:p>&nbsp;</o:p></span></a></p><span =
style=3D'mso-bookmark:_MailEndCompose'></span><p =
class=3DMsoNormal><b>From:</b> Netslices =
[mailto:netslices-bounces@ietf.org] <b>On Behalf Of </b>Greg =
Mirsky<br><b>Sent:</b> Wednesday, May 24, 2017 7:49 AM<br><b>To:</b> =
Daniele Ceccarelli &lt;daniele.ceccarelli@ericsson.com&gt;<br><b>Cc:</b> =
Leeyoung &lt;leeyoung@huawei.com&gt;; NetSlices@ietf.org; =
teas@ietf.org<br><b>Subject:</b> Re: [Netslices] [Teas] terminology =
discussion network slicing<o:p></o:p></p><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>Hi =
Daniele,<o:p></o:p></p><div><p class=3DMsoNormal>thank you for your kind =
and thorough consideration, glad we agree on the terminology. One minor, =
I think, note and the answer to your question under GIM2&gt;&gt; tag =
in-line.<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p =
class=3DMsoNormal>Regards,<o:p></o:p></p></div><div><p =
class=3DMsoNormal>Greg<o:p></o:p></p></div><div><p =
class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><p class=3DMsoNormal>On Wed, =
May 24, 2017 at 4:39 AM, Daniele Ceccarelli &lt;<a =
href=3D"mailto:daniele.ceccarelli@ericsson.com" =
target=3D"_blank">daniele.ceccarelli@ericsson.com</a>&gt; =
wrote:<o:p></o:p></p><blockquote style=3D'border:none;border-left:solid =
#CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DIT>Hi Greg,<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span =
lang=3DIT>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>good =
points. Please see in line.<span lang=3DIT><o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<span =
lang=3DIT><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Cheers<span =
lang=3DIT><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Daniele&nbsp=
; <span lang=3DIT><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>&nbsp;<span =
lang=3DIT><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><b>From:</b> Greg Mirsky [mailto:<a =
href=3D"mailto:gregimirsky@gmail.com" =
target=3D"_blank">gregimirsky@gmail.com</a>] <br><b>Sent:</b> sabato 20 =
maggio 2017 06:14<br><b>To:</b> Daniele Ceccarelli &lt;<a =
href=3D"mailto:daniele.ceccarelli@ericsson.com" =
target=3D"_blank">daniele.ceccarelli@ericsson.com</a>&gt;<br><b>Cc:</b> =
Leeyoung &lt;<a href=3D"mailto:leeyoung@huawei.com" =
target=3D"_blank">leeyoung@huawei.com</a>&gt;; <a =
href=3D"mailto:teas@ietf.org" target=3D"_blank">teas@ietf.org</a>; <a =
href=3D"mailto:NetSlices@ietf.org" =
target=3D"_blank">NetSlices@ietf.org</a><br><b>Subject:</b> Re: =
[Netslices] [Teas] terminology discussion network slicing<span =
lang=3DIT><o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>&nbsp;<o:p></o:p></span></p><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>Hi Daniele,<o:p></o:p></span></p><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>I think that my interpretation of network slice =
construct definition by 3GPP is slightly different. Please find my =
comments in-line tagged GIM&gt;&gt;. Some are to do with terminology =
but, I believe, it is helpful to settle the dictionary and agree on the =
interpretation of terms.<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>Regards,<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>Greg<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>&nbsp;<o:p></o:p></span></p><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>On Sat, May 20, 2017 at 4:18 AM, Daniele =
Ceccarelli &lt;<a href=3D"mailto:daniele.ceccarelli@ericsson.com" =
target=3D"_blank">daniele.ceccarelli@ericsson.com</a>&gt; =
wrote:<o:p></o:p></span></p><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5=
.0pt'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>Hi Young, all,<br><br>i agree with your =
conclusion but would like to clarify one thing that IMO got lost in the =
discussion since its beginning.<br><br>The 3GPP definition =
says:<br>&quot;A set of network functions and the resources for these =
network functions which are arranged and configured, forming a complete =
logical network to meet certain network =
characteristics.&quot;<br><br>This means that a network slice IS NOT a =
VPN or a TE Tunnel.<o:p></o:p></span></p></blockquote><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>GIM&gt;&gt; My view is that VPN or a TE Tunnel =
could be part of instantiation of a network slice. There likely to be =
additional to TE parameters that may be considered, depending on the =
profile of the service requested the NS.<o:p></o:p></span></p><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><i>[&gt;D=
C] I should have said =E2=80=9Cthis means that a network might not be =
JUST a VPN or a TE Tunnel=E2=80=9D and hence agree with you on the fact =
that the VPN or the TE Tunnel could be part of the network slice. =
</i></b><span lang=3DIT><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'>&nbsp;<span lang=3DIT><o:p></o:p></span></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5=
.0pt'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>A network slice is &quot;something&quot; =
(netslices and 3GPP will define what this something is) that is composed =
by a &quot;piece&quot; in the RADIO domain, a &quot;piece&quot; in the =
CLOUD domain, a &quot;piece&quot; in the TRANSPORT domain, plus possible =
other pieces in possible other =
domains.<o:p></o:p></span></p></blockquote><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>GIM&gt;&gt; I see separation of RAN and =
&quot;transport&quot; networks. Indeed, there will be e2e construct =
(will it be still referred as &quot;network slice&quot; or =
&quot;multi-domain NS&quot;) but it can be decomposed into domain-scope =
NSes. What you referred to as &quot;piece&quot; I consider as =
domain-scope NS.<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><i>[&gt;D=
C] This is another terminology issue. I agree on the separation between =
the RAN domain and the =E2=80=9Ctransport=E2=80=9D domain (let=E2=80=99s =
keep on using the work transport with quotation marks for the time =
being) and all the other domains in the network. IMO the network slice =
is the end to end entity that is built by a RAN slice plus a =
=E2=80=9Ctransport=E2=80=9D slice plus other potential slices. And the =
=E2=80=9Ctransport=E2=80=9D slice could be a VPN, a TE =
tunnel=E2=80=A6</i></b><span =
lang=3DIT><o:p></o:p></span></p></div></div></div></div></div></div></blo=
ckquote><div><p class=3DMsoNormal>GIM2&gt;&gt; If to a segment of a =
network slice instance in a core network we refer as transport domain, =
then, as I understand, it's peer may be not only RAN segment but, e.g., =
segment of an access network of another =
kind.&nbsp;<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><div><div><div><block=
quote style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in =
0in 0in =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5=
.0pt'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><br><span lang=3DIT>The word &quot;transport&quot; can be =
misleading here since one could think of transport technologies (e.g. =
WDM, OTN), but what I'm referring to as TRANSPORT DOMAIN is that part of =
the network that is used to carry a packet between two other =
domains.<br>In order to have a slice, that portion of the transport =
domain needs to be engineered, hence it is all about building a TE =
entity and stitching services to such entity. This is what is in the =
ACTN scope.<o:p></o:p></span></p></blockquote><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>GIM&gt;&gt; Should we use Client-Server =
terms?&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><i>[&gt;D=
C] WRT what? Do you mean wrt the fact that the relationship between e.g. =
the RAN slice and the =E2=80=9Ctransport=E2=80=9D slice could be client- =
server? I see it more a peering relationship. ON the other side WITHIN =
the =E2=80=9Ctransport=E2=80=9D slice you could have different layers =
with client-server relationship, that=E2=80=99s right.</i></b><span =
lang=3DIT><o:p></o:p></span></p></div></div></div></div></div></div></blo=
ckquote><div><p class=3DMsoNormal>GIM2&gt;&gt; Yes, should have been =
clearer, it is the latter.&nbsp;<o:p></o:p></p></div><blockquote =
style=3D'border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><div><div><div><div><=
div><blockquote style=3D'border:none;border-left:solid #CCCCCC =
1.0pt;padding:0in 0in 0in =
6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5=
.0pt'><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><br>My very personal opinion is that whatever belongs to the =
transport domain belongs to IETF (and is already being addressed), while =
the rest is a dangerous duplication of concepts standardized is other =
SDOs...but this is another discussion that doesn't fit =
here.<br><br><span lang=3DIT>BR<br><span =
class=3Dm544545598366900498hoenzb><span =
style=3D'color:#888888'>Daniele</span></span><span =
style=3D'color:#888888'><br></span><br><br><span =
class=3Dm544545598366900498im>-----Original Message-----</span><br><span =
class=3Dm544545598366900498im>From: Teas [mailto:<a =
href=3D"mailto:teas-bounces@ietf.org" =
target=3D"_blank">teas-bounces@ietf.org</a>] On Behalf Of =
Leeyoung</span><br><span class=3Dm544545598366900498im>Sent: =
venerd=C3=AC 19 maggio 2017 15:15</span><br><span =
class=3Dm544545598366900498im>To: <a href=3D"mailto:teas@ietf.org" =
target=3D"_blank">teas@ietf.org</a></span><br><span =
class=3Dm544545598366900498im>Cc: <a href=3D"mailto:NetSlices@ietf.org" =
target=3D"_blank">NetSlices@ietf.org</a></span><o:p></o:p></span></p><div=
><div><p class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span lang=3DIT>Subject: Re: [Teas] terminology discussion =
network slicing<br><br>Hi,<br><br>Lou is right. There is a dedicated =
email list for the discussion of &quot;network slicing (cc'ed)&quot; and =
the discussion about what that term means should be held on that =
list.<br><br>We have used similar language in =
draft-ietf-teas-actn-framework right from the<br>00 version. Recent =
changes have been an attempt to clarify what the terminology means in =
the context of ACTN. We are not trying to define or redefine =
&quot;network slicing&quot; in the ACTN document, but are trying to make =
it clear how ACTN works.<br><br>Therefore I propose the following =
resolution:<br><br>1. All discussion of the general applicability and =
definition of &quot;network slicing&quot; is held on the netslices =
mailing list.<br><br>2. We adopt Adrian's suggestion to explain that the =
scope of the definition of the terms used in the ACTN framework is =
limited to ACTN. That means effectively that if there are components of =
a wider definition of network slicing that are not supported by ACTN, =
that will be OK.<br><br>I propose to post an updated version in the next =
few days and I believe that will allow this draft to move ahead without =
being blocked by the discussion in netslices. Once the IETF has a stable =
definition of network slicing we can return and see how ACTN is =
applicable to that definition an whether more wok is need (in a separate =
draft).<br><br>Thanks,<br>Young<br><br>-----Original =
Message-----<br>From: Lou Berger [mailto:<a =
href=3D"mailto:lberger@labn.net" =
target=3D"_blank">lberger@labn.net</a>]<br>Sent: Tuesday, May 16, 2017 =
8:35 AM<br>To: Igor Bryskin &lt;<a =
href=3D"mailto:Igor.Bryskin@huawei.com" =
target=3D"_blank">Igor.Bryskin@huawei.com</a>&gt;; Belotti, Sergio =
(Nokia - IT/Vimercate) &lt;<a href=3D"mailto:sergio.belotti@nokia.com" =
target=3D"_blank">sergio.belotti@nokia.com</a>&gt;; Gert Grammel &lt;<a =
href=3D"mailto:ggrammel@juniper.net" =
target=3D"_blank">ggrammel@juniper.net</a>&gt;; Leeyoung &lt;<a =
href=3D"mailto:leeyoung@huawei.com" =
target=3D"_blank">leeyoung@huawei.com</a>&gt;; <a =
href=3D"mailto:teas@ietf.org" target=3D"_blank">teas@ietf.org</a>; <a =
href=3D"mailto:adrian@olddog.co.uk" =
target=3D"_blank">adrian@olddog.co.uk</a><br>Subject: Re: [Teas] =
terminology discussion network slicing<br><br>Perhaps it's time to bring =
the discussion to the slicing list and report back their =
reaponse....<br><br>Lou<br><br><br>On May 16, 2017 8:31:19 AM Igor =
Bryskin &lt;<a href=3D"mailto:Igor.Bryskin@huawei.com" =
target=3D"_blank">Igor.Bryskin@huawei.com</a>&gt; wrote:<br><br>&gt; Hi =
Sergio,<br>&gt;<br>&gt; I would also like to hear more from network =
slicing experts.<br>&gt;<br>&gt; My understanding is that the difference =
in the separation (in terms of<br>&gt; control and data planes, =
security, etc.). For example, traditional BGP<br>&gt; based L3 VPNs =
(that use provider's common control plane for their<br>&gt; management =
and IP/MPLS TE tunnels to inter-connect their PEs) will<br>&gt; probably =
not be able guarantee for the clients msec range connectivity<br>&gt; =
setup times required by 5g, while provided by the same provider =
fully<br>&gt; separated/genuinely private IP/MPLS networks (that do not =
share<br>&gt; IP/MPLS control plane and infrastructure, whose network =
topology is<br>&gt; supported by separate L0/L1 connections) hopefully =
will be able to<br>&gt; provide such guarantees. Therefore, I define =
layer network slices as<br>&gt; dynamically managed fully isolated in =
control and data planes private<br>&gt; TE layer networks, which may =
share one or more underlying server layer =
networks.<br>&gt;<br>&gt;<br>&gt; Cheers,<br>&gt; =
Igor<br>&gt;<br>&gt;<br>&gt;<br>&gt;<br>&gt; -----Original =
Message-----<br>&gt; From: Teas [mailto:<a =
href=3D"mailto:teas-bounces@ietf.org" =
target=3D"_blank">teas-bounces@ietf.org</a>] On Behalf Of Belotti, =
Sergio<br>&gt; (Nokia - IT/Vimercate)<br>&gt; Sent: Tuesday, May 16, =
2017 6:08 AM<br>&gt; To: Gert Grammel; Leeyoung; <a =
href=3D"mailto:teas@ietf.org" target=3D"_blank">teas@ietf.org</a>; <a =
href=3D"mailto:adrian@olddog.co.uk" =
target=3D"_blank">adrian@olddog.co.uk</a><br>&gt; Subject: Re: [Teas] =
terminology discussion network slicing<br>&gt;<br>&gt; Hi =
Gert,<br>&gt;<br>&gt; &quot;Thinking a bit about it I came to the point =
where &quot;VPN&quot; and &quot;network<br>&gt; slices&quot; seem to =
describe the same entity or at least a &quot;network slice&quot;<br>&gt; =
being a VPN of VPNs?&quot;<br>&gt;<br>&gt; I share completely your =
conclusion , I'd like if someone can explain<br>&gt; if a difference =
really exists .<br>&gt;<br>&gt; Thanks<br>&gt; =
Sergio<br>&gt;<br>&gt;<br>&gt; -----Original Message-----<br>&gt; From: =
Teas [mailto:<a href=3D"mailto:teas-bounces@ietf.org" =
target=3D"_blank">teas-bounces@ietf.org</a>] On Behalf Of Gert =
Grammel<br>&gt; Sent: Monday, May 15, 2017 7:02 PM<br>&gt; To: Leeyoung =
&lt;<a href=3D"mailto:leeyoung@huawei.com" =
target=3D"_blank">leeyoung@huawei.com</a>&gt;; <a =
href=3D"mailto:teas@ietf.org" target=3D"_blank">teas@ietf.org</a>; <a =
href=3D"mailto:adrian@olddog.co.uk" =
target=3D"_blank">adrian@olddog.co.uk</a><br>&gt; Subject: Re: [Teas] =
terminology discussion network slicing<br>&gt;<br>&gt; =
Leeyoung,<br>&gt;<br>&gt; Thank you for taking a stab on this. Usually =
when getting to a<br>&gt; definition, I try to establish what kind of =
existing constructs would<br>&gt; fall under the definition. If my =
understanding is correct, the<br>&gt; following list of constructs would =
all satisfy the definition somehow.<br>&gt; - A TDM network with a p2p =
TDM connection<br>&gt; - A PSC capable network carrying a p2p circuit =
(such as EPL/EVPL)<br>&gt; - An MPLS LSP using a traffic engineered IP =
network<br>&gt; - A L2VPN using a traffic engineered MPLS =
network<br>&gt; - A L3VPN using a traffic engineered IP network<br>&gt; =
- A TCP connection using a traffic engineered IP network<br>&gt; - =
Different QoS classes in an IP network<br>&gt;<br>&gt; Thinking a bit =
about it I came to the point where &quot;VPN&quot; and =
&quot;network<br>&gt; slices&quot; seem to describe the same entity or =
at least a &quot;network slice&quot;<br>&gt; being a VPN of =
VPNs?<br>&gt;<br>&gt; Gert<br>&gt;<br>&gt;<br>&gt; On 2017-05-17, 16:44, =
&quot;Teas on behalf of Leeyoung&quot;<br>&gt; &lt;<a =
href=3D"mailto:teas-bounces@ietf.org" =
target=3D"_blank">teas-bounces@ietf.org</a> on behalf of <a =
href=3D"mailto:leeyoung@huawei.com" =
target=3D"_blank">leeyoung@huawei.com</a>&gt; =
wrote:<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;Hi Adrian and =
others,<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;We'd like cross check with =
you on some terminology we introduced newly. Any<br>&gt;&nbsp; &nbsp; =
&nbsp;comment on these terms will be greatly =
appreciated.<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;We introduced 'network =
slicing' as follows:<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp; &nbsp;Network slicing is a collection of resources<br>&gt;&nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;that are used to establish =
logically dedicated virtual networks<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp; &nbsp; &nbsp;over TE networks. It allows a network provider to =
provide<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;dedicated =
virtual networks for application/customer over a<br>&gt;&nbsp; &nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;common network infrastructure. The =
logically dedicated<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;resources are a part of the larger common network<br>&gt;&nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;infrastructures that are shared =
among various network slice<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp; &nbsp;instances which are the end-to-end realization of =
network<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;slicing, =
consisting of the combination of physically or<br>&gt;&nbsp; &nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;logically dedicated =
resources.<br>&gt;<br>&gt;<br>&gt;&nbsp; &nbsp; =
&nbsp;Thanks.<br>&gt;&nbsp; &nbsp; &nbsp;Young and Daniele<br>&gt;&nbsp; =
&nbsp; &nbsp;-----Original Message-----<br>&gt;&nbsp; &nbsp; &nbsp;From: =
Leeyoung<br>&gt;&nbsp; &nbsp; &nbsp;Sent: Friday, May 05, 2017 1:41 =
PM<br>&gt;&nbsp; &nbsp; &nbsp;To: <a href=3D"mailto:teas@ietf.org" =
target=3D"_blank">teas@ietf.org</a><br>&gt;&nbsp; &nbsp; &nbsp;Subject: =
RE: [Teas] I-D Action:<br>&gt; =
draft-ietf-teas-actn-framework-05.txt<br>&gt;<br>&gt;&nbsp; &nbsp; =
&nbsp;Hi,<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;This update is intended to =
incorporate the comments from the last WG<br>&gt;&nbsp; &nbsp; =
&nbsp;meeting and any pending issues. We also have taken the global =
editorial<br>&gt;&nbsp; &nbsp; &nbsp;changes to make it consistent =
through the document. Major changes are:<br>&gt;<br>&gt;&nbsp; &nbsp; =
&nbsp;- Inclusion of &quot;network slicing&quot; definition from ACTN =
perspective (in the<br>&gt;&nbsp; &nbsp; &nbsp;terminology =
section)<br>&gt;&nbsp; &nbsp; &nbsp;- Added virtual network service =
(VNS) section (Section 3) to define types<br>&gt;&nbsp; &nbsp; &nbsp;of =
VNS.<br>&gt;&nbsp; &nbsp; &nbsp;- Incorporated &quot;orchestration&quot; =
(service/network) mapping to ACTN<br>&gt;&nbsp; &nbsp; =
&nbsp;architecture (See Section 5.2)<br>&gt;&nbsp; &nbsp; &nbsp;- =
Created a new section 6 (Topology Abstraction Method) where we =
imported<br>&gt;&nbsp; &nbsp; &nbsp;some texts from ACTN abstraction =
method<br>&gt;&nbsp; &nbsp; &nbsp;<a =
href=3D"https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01" =
target=3D"_blank">https://tools.ietf.org/html/draft-lee-teas-actn-abstrac=
tion-01</a><br>&gt;&nbsp; &nbsp; &nbsp;- Added Appendices A &amp; B to =
discuss example deployment scenarios such as<br>&gt;&nbsp; &nbsp; =
&nbsp;example of MDSC and PNC functions integrated in =
Service/Network<br>&gt;&nbsp; &nbsp; &nbsp;Orchestrator (Appendix A) and =
example of IP + Optical network with L3VPN<br>&gt;&nbsp; &nbsp; =
&nbsp;service (Appendix B)<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;In regard =
to ACTN abstraction method draft, we are going to keep it as =
a<br>&gt;&nbsp; &nbsp; &nbsp;separate draft and use this document to =
elaborate other aspects not<br>&gt;&nbsp; &nbsp; &nbsp;imported to the =
framework document.<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;The following =
diff pointer will help you see the changes with this =
revision:<br>&gt;<br>&gt; <a =
href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framewor=
k-05" =
target=3D"_blank">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-act=
n-framework-05</a><br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;The co-authors =
believe that the document is ready for WG LC. Any<br>&gt;&nbsp; &nbsp; =
&nbsp;changes/comments will be appreciated.<br>&gt;<br>&gt;&nbsp; &nbsp; =
&nbsp;Thanks &amp; Best regards,<br>&gt;&nbsp; &nbsp; &nbsp;Young &amp; =
Daniele (on behalf of other =
co-authors/contributors)<br>&gt;<br>&gt;&nbsp; &nbsp; =
&nbsp;-----Original Message-----<br>&gt;&nbsp; &nbsp; &nbsp;From: Teas =
[mailto:<a href=3D"mailto:teas-bounces@ietf.org" =
target=3D"_blank">teas-bounces@ietf.org</a>] On Behalf Of <a =
href=3D"mailto:internet-drafts@ietf.org" =
target=3D"_blank">internet-drafts@ietf.org</a><br>&gt;&nbsp; &nbsp; =
&nbsp;Sent: Friday, May 05, 2017 10:41 AM<br>&gt;&nbsp; &nbsp; &nbsp;To: =
<a href=3D"mailto:i-d-announce@ietf.org" =
target=3D"_blank">i-d-announce@ietf.org</a><br>&gt;&nbsp; &nbsp; =
&nbsp;Cc: <a href=3D"mailto:teas@ietf.org" =
target=3D"_blank">teas@ietf.org</a><br>&gt;&nbsp; &nbsp; &nbsp;Subject: =
[Teas] I-D Action: =
draft-ietf-teas-actn-framework-05.txt<br>&gt;<br>&gt;<br>&gt;&nbsp; =
&nbsp; &nbsp;A New Internet-Draft is available from the on-line =
Internet-Drafts directories.<br>&gt;&nbsp; &nbsp; &nbsp;This draft is a =
work item of the Traffic Engineering Architecture and<br>&gt;&nbsp; =
&nbsp; &nbsp;Signaling of the IETF.<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp;Title&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;: Framework for Abstraction and Control of Traffic<br>&gt;&nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Engineered =
Networks<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp;Authors&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;: Daniele =
Ceccarelli<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;Young =
Lee<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp;Filename&nbsp; &nbsp; &nbsp; =
&nbsp; : draft-ietf-teas-actn-framework-05.txt<br>&gt;&nbsp; &nbsp; =
&nbsp; &nbsp;Pages&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;: =
41<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp;Date&nbsp; &nbsp; &nbsp; &nbsp; =
&nbsp; &nbsp; : 2017-05-05<br>&gt;<br>&gt;&nbsp; &nbsp; =
&nbsp;Abstract:<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; Traffic Engineered =
networks have a variety of mechanisms to<br>&gt;&nbsp; &nbsp; &nbsp; =
&nbsp; facilitate the separation of the data plane and control plane. =
They<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; also have a range of management =
and provisioning protocols to<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; =
configure and activate network resources.&nbsp; These =
mechanisms<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; represent key technologies =
for enabling flexible and dynamic<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; =
networking.<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; Abstraction of =
network resources is a technique that can be applied<br>&gt;&nbsp; =
&nbsp; &nbsp; &nbsp; to a single network domain or across multiple =
domains to create a<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; single =
virtualized network that is under the control of a network<br>&gt;&nbsp; =
&nbsp; &nbsp; &nbsp; operator or the customer of the operator that =
actually owns<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; the network =
resources.<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp; &nbsp; This document =
provides a framework for Abstraction and Control of<br>&gt;&nbsp; &nbsp; =
&nbsp; &nbsp; Traffic Engineered Networks =
(ACTN).<br>&gt;<br>&gt;<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;The IETF =
datatracker status page for this draft is:<br>&gt;&nbsp; &nbsp; &nbsp;<a =
href=3D"https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/"=
 =
target=3D"_blank">https://datatracker.ietf.org/doc/draft-ietf-teas-actn-f=
ramework/</a><br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;There are also htmlized =
versions available at:<br>&gt;&nbsp; &nbsp; &nbsp;<a =
href=3D"https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05" =
target=3D"_blank">https://tools.ietf.org/html/draft-ietf-teas-actn-framew=
ork-05</a><br>&gt;<br>&gt; <a =
href=3D"https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framew=
ork-0" =
target=3D"_blank">https://datatracker.ietf.org/doc/html/draft-ietf-teas-a=
ctn-framework-0</a><br>&gt; 5<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;A diff =
from the previous version is available at:<br>&gt;<br>&gt; <a =
href=3D"https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framewor=
k-05" =
target=3D"_blank">https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-act=
n-framework-05</a><br>&gt;<br>&gt;<br>&gt;&nbsp; &nbsp; &nbsp;Please =
note that it may take a couple of minutes from the time of<br>&gt;&nbsp; =
&nbsp; &nbsp;submission until the htmlized version and diff are =
available at <a href=3D"http://tools.ietf.org" =
target=3D"_blank">tools.ietf.org</a>.<br>&gt;<br>&gt;&nbsp; &nbsp; =
&nbsp;Internet-Drafts are also available by anonymous FTP =
at:<br>&gt;&nbsp; &nbsp; &nbsp;<a =
href=3D"ftp://ftp.ietf.org/internet-drafts/" =
target=3D"_blank">ftp://ftp.ietf.org/internet-drafts/</a><br>&gt;<br>&gt;=
&nbsp; &nbsp; =
&nbsp;_______________________________________________<br>&gt;&nbsp; =
&nbsp; &nbsp;Teas mailing list<br>&gt;&nbsp; &nbsp; &nbsp;<a =
href=3D"mailto:Teas@ietf.org" =
target=3D"_blank">Teas@ietf.org</a><br>&gt;&nbsp; &nbsp; &nbsp;<a =
href=3D"https://www.ietf.org/mailman/listinfo/teas" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br>&gt;<=
br>&gt;&nbsp; &nbsp; =
&nbsp;_______________________________________________<br>&gt;&nbsp; =
&nbsp; &nbsp;Teas mailing list<br>&gt;&nbsp; &nbsp; &nbsp;<a =
href=3D"mailto:Teas@ietf.org" =
target=3D"_blank">Teas@ietf.org</a><br>&gt;&nbsp; &nbsp; &nbsp;<a =
href=3D"https://www.ietf.org/mailman/listinfo/teas" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br>&gt;<=
br>&gt;<br>&gt; _______________________________________________<br>&gt; =
Teas mailing list<br>&gt; <a href=3D"mailto:Teas@ietf.org" =
target=3D"_blank">Teas@ietf.org</a><br>&gt; <a =
href=3D"https://www.ietf.org/mailman/listinfo/teas" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br>&gt;<=
br>&gt; _______________________________________________<br>&gt; Teas =
mailing list<br>&gt; <a href=3D"mailto:Teas@ietf.org" =
target=3D"_blank">Teas@ietf.org</a><br>&gt; <a =
href=3D"https://www.ietf.org/mailman/listinfo/teas" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br>&gt;<=
br>&gt; _______________________________________________<br>&gt; Teas =
mailing list<br>&gt; <a href=3D"mailto:Teas@ietf.org" =
target=3D"_blank">Teas@ietf.org</a><br>&gt; <a =
href=3D"https://www.ietf.org/mailman/listinfo/teas" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br>&gt;<=
br><br><br>_______________________________________________<br>Teas =
mailing list<br><a href=3D"mailto:Teas@ietf.org" =
target=3D"_blank">Teas@ietf.org</a><br><a =
href=3D"https://www.ietf.org/mailman/listinfo/teas" =
target=3D"_blank">https://www.ietf.org/mailman/listinfo/teas</a><br><br>_=
______________________________________________<br>Netslices mailing =
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target=3D"_blank">https://www.ietf.org/mailman/listinfo/netslices</a><o:p=
></o:p></span></p></div></div></blockquote></div></div></div><p =
class=3DMsoNormal =
style=3D'mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:3=
5.4pt'><span =
lang=3DIT>&nbsp;<o:p></o:p></span></p></div></div></div></div></blockquot=
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Reply-To: <sebastian.thalanany@ieee.org>
From: "sebastian" <comscape@gmail.com>
To: "'Igor Bryskin'" <Igor.Bryskin@huawei.com>, "'Jeff Tantsura'" <jefftant.ietf@gmail.com>, "'qiangli \(D\)'" <qiangli3@huawei.com>, "'Daniele Ceccarelli'" <daniele.ceccarelli@ericsson.com>, "'Leeyoung'" <leeyoung@huawei.com>, <teas@ietf.org>
Cc: <NetSlices@ietf.org>
References: <7AEB3D6833318045B4AE71C2C87E8E172B2CA60E@SJCEML702-CHM.china.huawei.com> <97EE7243-CB44-40AD-B02D-98E07D9C79F2@juniper.net> <DB3PR07MB0588EA2B00C389E762D8C59F91E60@DB3PR07MB0588.eurprd07.prod.outlook.com> <0C72C38E7EBC34499E8A9E7DD00786390993DBF8@SJCEML702-CHM.china.huawei.com> <15c1177e0c0.27d3.9b4188e636579690ba6c69f2c8a0f1fd@labn.net> <7AEB3D6833318045B4AE71C2C87E8E172B2CC48E@SJCEML702-CHM.china.huawei.com> <AM2PR07MB099483A94CDDD068D0F86CD5F0E50@AM2PR07MB0994.eurprd07.prod.outlook.com> <0C72C38E7EBC34499E8A9E7DD0078639099515B3@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB49B9@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD007863909953AFA@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB520C@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD0078639099662D6@SJCEML702-CHM.china.huawei.com> <4B13E4DA-DB18-4454-AFC4-57A8B1264CE1@gmail.com> <0C72C38E7EBC34499E8A9E7DD00786390996673B@SJCEML702-CHM.china.huawei.com>
In-Reply-To: <0C72C38E7EBC34499E8A9E7DD00786390996673B@SJCEML702-CHM.china.huawei.com>
Date: Sun, 28 May 2017 00:12:02 -0500
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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Hello, Jeff,

Agree with your view that the scope (core and/or radio layer) of a =
'network slice' could vary depending on the triggers for instantiating =
the 'network slice'.

On the other hand the instantiation of a 'network slice' may also be e2e =
(end-to-end), such as in device roaming scenarios, or in the case of =
vertical services that span different service providers.

The span of a 'network slice' is only limited by the availability of =
resources and appropriate policies (e.g. SLAs), independent of whether =
those resources are in the core network layer or in the radio network =
layer.

The management and orchestration of resources should be capable of =
instantiating a 'network slice' with an e2e (end-to-end) scope, where =
the scope could be between two devices, connected across intervening =
radio networks and core networks that may belong to the same or =
different administrative domains.

Many thanks.
-Sebastian


-----Original Message-----
From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor =
Bryskin
Sent: Wednesday, May 24, 2017 7:56 AM
To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) =
<qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Netslices] [Teas] terminology discussion network slicing

Thanks Jeff,

I am glad we are in sync.

Igor

-----Original Message-----
From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]=20
Sent: Wednesday, May 24, 2017 8:45 AM
To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Teas] terminology discussion network slicing

+1 Igor

>From transport side (L0-L3) we need to expose set of API=E2=80=99s that =
would allow to request a set of resources (a slice) either virtualized =
of physical that meet the constrains as requested by the business logic. =
Radio, while would definitely be one of most important use cases, would =
not be exclusively for radio use only. Any network management/ =
orchestration layer ideally should be able to use same set of =
API=E2=80=99s to request an e2e service.

Cheers,
Jeff
=20

On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" =
<teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:

    Hi Cristina,
   =20
    I didn=E2=80=99t say that ns has nothing to do with radio. I said =
that ns *may* have nothing to do with radio, i.e. may support/enable =
network architectures that do not involve radio necessarily.
   =20
    Igor
   =20
    -----Original Message-----
    From: qiangli (D)=20
    Sent: Wednesday, May 24, 2017 5:05 AM
    To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion network =
slicing
   =20
    Hi Igor,
   =20
    I share the same opinion on 5G and network slicing, but can't see =
the relation between this opinion and your conclusion that ns has =
nothing to do with radio.
   =20
    Best regards,
   =20
    Cristina QIANG
   =20
   =20
    -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    =E5=8F=91=E4=BB=B6=E4=BA=BA: Igor Bryskin=20
    =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 23:50
    =E6=94=B6=E4=BB=B6=E4=BA=BA: qiangli (D); Daniele Ceccarelli; =
Leeyoung; teas@ietf.org
    =E6=8A=84=E9=80=81: NetSlices@ietf.org
    =E4=B8=BB=E9=A2=98: RE: [Teas] terminology discussion network =
slicing
   =20
    Hi Cristina,
   =20
    People whose opinion I respect very much told me that even the 3GPP =
network slicing definition and effort is not 5G specific.  Network =
slicing is viewed as an important capability of 5G, but it could serve =
other architectures.
   =20
    Cheers,
    Igor
   =20
    -----Original Message-----
    From: qiangli (D)
    Sent: Saturday, May 20, 2017 5:27 AM
    To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion network =
slicing
   =20
    Hi Igor,
   =20
    I have different opinion on " Network slicing may have nothing to do =
with radio".
    IMO, network slicing should be a resource-oriented management mode. =
The end-to-end network slice (from UE to server/other UE) of course =
involves the radio resource, usually we use the word "RAN-radio access =
network" rather than simply say "radio". The Frequency band, time, code, =
equipment/site, and software are a number of dimensions, in which RAN =
resources can be isolated [Online available =
http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-se=
rvice-guaranteed-network-slicing-whitepaper].
   =20
    Best regards,
   =20
    Qiang, Li (Cristina)
    NetLab, Huawei
   =20
   =20
    -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    =E5=8F=91=E4=BB=B6=E4=BA=BA: Netslices =
[mailto:netslices-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Igor Bryskin
    =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 6:12
    =E6=94=B6=E4=BB=B6=E4=BA=BA: Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
    =E6=8A=84=E9=80=81: NetSlices@ietf.org
    =E4=B8=BB=E9=A2=98: Re: [Netslices] [Teas] terminology discussion =
network slicing
   =20
    Hi Danielle,
   =20
    Network slicing may have nothing to do with radio. 5g is just a big =
reason as to why the interest/focus is back on network slicing, which is =
a very old concept. I don't think that anyone is arguing with what you =
wrote. The questions are:
    a) how do you manage these "pieces"?
    b) what policy infrastructure should be put in place?
    c) how do you ensure their separation or, conversely, the degree of =
resource sharing?
    d) why exactly legacy VPNs are not good enough?
   =20
    Cheers,
    Igor
   =20
   =20
     =20
   =20
    -----Original Message-----
    From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele =
Ceccarelli
    Sent: Friday, May 19, 2017 4:19 PM
    To: Leeyoung; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: Re: [Teas] terminology discussion network slicing
   =20
    Hi Young, all,
   =20
    i agree with your conclusion but would like to clarify one thing =
that IMO got lost in the discussion since its beginning.
   =20
    The 3GPP definition says:=20
    "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."
   =20
    This means that a network slice IS NOT a VPN or a TE Tunnel.
    A network slice is "something" (netslices and 3GPP will define what =
this something is) that is composed by a "piece" in the RADIO domain, a =
"piece" in the CLOUD domain, a "piece" in the TRANSPORT domain, plus =
possible other pieces in possible other domains.
   =20
    The word "transport" can be misleading here since one could think of =
transport technologies (e.g. WDM, OTN), but what I'm referring to as =
TRANSPORT DOMAIN is that part of the network that is used to carry a =
packet between two other domains.=20
    In order to have a slice, that portion of the transport domain needs =
to be engineered, hence it is all about building a TE entity and =
stitching services to such entity. This is what is in the ACTN scope.
   =20
    My very personal opinion is that whatever belongs to the transport =
domain belongs to IETF (and is already being addressed), while the rest =
is a dangerous duplication of concepts standardized is other SDOs...but =
this is another discussion that doesn't fit here.
   =20
    BR
    Daniele =20
   =20
   =20
    -----Original Message-----
    From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
    Sent: venerd=C3=AC 19 maggio 2017 15:15
    To: teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: Re: [Teas] terminology discussion network slicing
   =20
    Hi,
   =20
    Lou is right. There is a dedicated email list for the discussion of =
"network slicing (cc'ed)" and the discussion about what that term means =
should be held on that list.=20
   =20
    We have used similar language in draft-ietf-teas-actn-framework =
right from the
    00 version. Recent changes have been an attempt to clarify what the =
terminology means in the context of ACTN. We are not trying to define or =
redefine "network slicing" in the ACTN document, but are trying to make =
it clear how ACTN works.
   =20
    Therefore I propose the following resolution:
   =20
    1. All discussion of the general applicability and definition of =
"network slicing" is held on the netslices mailing list.
   =20
    2. We adopt Adrian's suggestion to explain that the scope of the =
definition of the terms used in the ACTN framework is limited to ACTN. =
That means effectively that if there are components of a wider =
definition of network slicing that are not supported by ACTN, that will =
be OK.=20
   =20
    I propose to post an updated version in the next few days and I =
believe that will allow this draft to move ahead without being blocked =
by the discussion in netslices. Once the IETF has a stable definition of =
network slicing we can return and see how ACTN is applicable to that =
definition an whether more wok is need (in a separate draft).
   =20
    Thanks,
    Young
   =20
    -----Original Message-----
    From: Lou Berger [mailto:lberger@labn.net]
    Sent: Tuesday, May 16, 2017 8:35 AM
    To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - =
IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel =
<ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
    Subject: Re: [Teas] terminology discussion network slicing
   =20
    Perhaps it's time to bring the discussion to the slicing list and =
report back their reaponse....
   =20
    Lou
   =20
   =20
    On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> =
wrote:
   =20
    > Hi Sergio,
    >
    > I would also like to hear more from network slicing experts.
    >
    > My understanding is that the difference in the separation (in =
terms of=20
    > control and data planes, security, etc.). For example, traditional =
BGP=20
    > based L3 VPNs (that use provider's common control plane for their=20
    > management and IP/MPLS TE tunnels to inter-connect their PEs) will =

    > probably not be able guarantee for the clients msec range =
connectivity=20
    > setup times required by 5g, while provided by the same provider =
fully=20
    > separated/genuinely private IP/MPLS networks (that do not share=20
    > IP/MPLS control plane and infrastructure, whose network topology =
is=20
    > supported by separate L0/L1 connections) hopefully will be able to =

    > provide such guarantees. Therefore, I define layer network slices =
as=20
    > dynamically managed fully isolated in control and data planes =
private=20
    > TE layer networks, which may share one or more underlying server =
layer networks.
    >
    >
    > Cheers,
    > Igor
    >
    >
    >
    >
    > -----Original Message-----
    > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, =
Sergio=20
    > (Nokia - IT/Vimercate)
    > Sent: Tuesday, May 16, 2017 6:08 AM
    > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
    > Subject: Re: [Teas] terminology discussion network slicing
    >
    > Hi Gert,
    >
    > "Thinking a bit about it I came to the point where "VPN" and =
"network=20
    > slices" seem to describe the same entity or at least a "network =
slice"
    > being a VPN of VPNs?"
    >
    > I share completely your conclusion , I'd like if someone can =
explain=20
    > if a difference really exists .
    >
    > Thanks
    > Sergio
    >
    >
    > -----Original Message-----
    > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert =
Grammel
    > Sent: Monday, May 15, 2017 7:02 PM
    > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
    > Subject: Re: [Teas] terminology discussion network slicing
    >
    > Leeyoung,
    >
    > Thank you for taking a stab on this. Usually when getting to a=20
    > definition, I try to establish what kind of existing constructs =
would=20
    > fall under the definition. If my understanding is correct, the=20
    > following list of constructs would all satisfy the definition =
somehow.
    > - A TDM network with a p2p TDM connection
    > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
    > - An MPLS LSP using a traffic engineered IP network
    > - A L2VPN using a traffic engineered MPLS network
    > - A L3VPN using a traffic engineered IP network
    > - A TCP connection using a traffic engineered IP network
    > - Different QoS classes in an IP network
    >
    > Thinking a bit about it I came to the point where "VPN" and =
"network=20
    > slices" seem to describe the same entity or at least a "network =
slice"
    > being a VPN of VPNs?
    >
    > Gert
    >
    >
    > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"=20
    > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
    >
    >     Hi Adrian and others,
    >
    >     We'd like cross check with you on some terminology we =
introduced newly. Any=20
    >     comment on these terms will be greatly appreciated.
    >
    >     We introduced 'network slicing' as follows:
    >
    >             Network slicing is a collection of resources
    >             that are used to establish logically dedicated virtual =
networks
    >             over TE networks. It allows a network provider to =
provide
    >             dedicated virtual networks for application/customer =
over a
    >             common network infrastructure. The logically dedicated
    >             resources are a part of the larger common network
    >             infrastructures that are shared among various network =
slice
    >             instances which are the end-to-end realization of =
network
    >             slicing, consisting of the combination of physically =
or
    >             logically dedicated resources.
    >
    >
    >     Thanks.
    >     Young and Daniele
    >     -----Original Message-----
    >     From: Leeyoung
    >     Sent: Friday, May 05, 2017 1:41 PM
    >     To: teas@ietf.org
    >     Subject: RE: [Teas] I-D Action:=20
    > draft-ietf-teas-actn-framework-05.txt
    >
    >     Hi,
    >
    >     This update is intended to incorporate the comments from the =
last WG=20
    >     meeting and any pending issues. We also have taken the global =
editorial=20
    >     changes to make it consistent through the document. Major =
changes are:
    >
    >     - Inclusion of "network slicing" definition from ACTN =
perspective (in the=20
    >     terminology section)
    >     - Added virtual network service (VNS) section (Section 3) to =
define types=20
    >     of VNS.
    >     - Incorporated "orchestration" (service/network) mapping to =
ACTN=20
    >     architecture (See Section 5.2)
    >     - Created a new section 6 (Topology Abstraction Method) where =
we imported=20
    >     some texts from ACTN abstraction method =20
    >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
    >     - Added Appendices A & B to discuss example deployment =
scenarios such as=20
    >     example of MDSC and PNC functions integrated in =
Service/Network=20
    >     Orchestrator (Appendix A) and example of IP + Optical network =
with L3VPN=20
    >     service (Appendix B)
    >
    >     In regard to ACTN abstraction method draft, we are going to =
keep it as a=20
    >     separate draft and use this document to elaborate other =
aspects not=20
    >     imported to the framework document.
    >
    >     The following diff pointer will help you see the changes with =
this revision:
    >    =20
    > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >
    >     The co-authors believe that the document is ready for WG LC. =
Any=20
    >     changes/comments will be appreciated.
    >
    >     Thanks & Best regards,
    >     Young & Daniele (on behalf of other co-authors/contributors)
    >
    >     -----Original Message-----
    >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
internet-drafts@ietf.org
    >     Sent: Friday, May 05, 2017 10:41 AM
    >     To: i-d-announce@ietf.org
    >     Cc: teas@ietf.org
    >     Subject: [Teas] I-D Action: =
draft-ietf-teas-actn-framework-05.txt
    >
    >
    >     A New Internet-Draft is available from the on-line =
Internet-Drafts directories.
    >     This draft is a work item of the Traffic Engineering =
Architecture and=20
    >     Signaling of the IETF.
    >
    >             Title           : Framework for Abstraction and =
Control of Traffic=20
    >             Engineered Networks
    >             Authors         : Daniele Ceccarelli
    >                               Young Lee
    >     	Filename        : draft-ietf-teas-actn-framework-05.txt
    >     	Pages           : 41
    >     	Date            : 2017-05-05
    >
    >     Abstract:
    >        Traffic Engineered networks have a variety of mechanisms to
    >        facilitate the separation of the data plane and control =
plane. They
    >        also have a range of management and provisioning protocols =
to
    >        configure and activate network resources.  These mechanisms
    >        represent key technologies for enabling flexible and =
dynamic
    >        networking.
    >
    >        Abstraction of network resources is a technique that can be =
applied
    >        to a single network domain or across multiple domains to =
create a
    >        single virtualized network that is under the control of a =
network
    >        operator or the customer of the operator that actually owns
    >        the network resources.
    >
    >        This document provides a framework for Abstraction and =
Control of
    >        Traffic Engineered Networks (ACTN).
    >
    >
    >
    >     The IETF datatracker status page for this draft is:
    >     =
https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
    >
    >     There are also htmlized versions available at:
    >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
    >    =20
    > =
https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
    > 5
    >
    >     A diff from the previous version is available at:
    >    =20
    > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >
    >
    >     Please note that it may take a couple of minutes from the time =
of=20
    >     submission until the htmlized version and diff are available =
at tools.ietf.org.
    >
    >     Internet-Drafts are also available by anonymous FTP at:
    >     ftp://ftp.ietf.org/internet-drafts/
    >
    >     _______________________________________________
    >     Teas mailing list
    >     Teas@ietf.org
    >     https://www.ietf.org/mailman/listinfo/teas
    >
    >     _______________________________________________
    >     Teas mailing list
    >     Teas@ietf.org
    >     https://www.ietf.org/mailman/listinfo/teas
    >
    >
    > _______________________________________________
    > Teas mailing list
    > Teas@ietf.org
    > https://www.ietf.org/mailman/listinfo/teas
    >
    > _______________________________________________
    > Teas mailing list
    > Teas@ietf.org
    > https://www.ietf.org/mailman/listinfo/teas
    >
    > _______________________________________________
    > Teas mailing list
    > Teas@ietf.org
    > https://www.ietf.org/mailman/listinfo/teas
    >
   =20
   =20
    _______________________________________________
    Teas mailing list
    Teas@ietf.org
    https://www.ietf.org/mailman/listinfo/teas
   =20
    _______________________________________________
    Teas mailing list
    Teas@ietf.org
    https://www.ietf.org/mailman/listinfo/teas
   =20
    _______________________________________________
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    Netslices@ietf.org
    https://www.ietf.org/mailman/listinfo/netslices
    _______________________________________________
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    https://www.ietf.org/mailman/listinfo/teas
   =20


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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: Greg Mirsky <gregimirsky@gmail.com>
CC: Leeyoung <leeyoung@huawei.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>,  "teas@ietf.org" <teas@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, "'Greg Mirsky'" <gregimirsky@gmail.com>
CC: 'Leeyoung' <leeyoung@huawei.com>, "NetSlices@ietf.org" <NetSlices@ietf.org>, "teas@ietf.org" <teas@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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From nobody Mon May 29 02:01:40 2017
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, "'Igor Bryskin'" <Igor.Bryskin@huawei.com>, 'Jeff Tantsura' <jefftant.ietf@gmail.com>, "'qiangli (D)'" <qiangli3@huawei.com>, 'Leeyoung' <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
CC: "NetSlices@ietf.org" <NetSlices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion  network slicing
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Date: Mon, 29 May 2017 09:01:19 +0000
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: "Dongjie (Jimmy)" <jie.dong@huawei.com>, Igor Bryskin <Igor.Bryskin@huawei.com>, "qiangli (D)" <qiangli3@huawei.com>, Leeyoung <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
CC: "NetSlices@ietf.org" <NetSlices@ietf.org>
Thread-Topic: [Teas] terminology discussion  network slicing
Thread-Index: AdLNibwU9LLkPQ+KR4i49jploFvNwAAI/kYAAB+Mu/AABD85EAADEr8AAJYw3wAADP6xYAAFvnCAAMZToyAAGMZugAAIQ4QAAE+Z7wAApJMjUA==
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, 'Igor Bryskin' <Igor.Bryskin@huawei.com>, 'Jeff Tantsura' <jefftant.ietf@gmail.com>, "'qiangli (D)'" <qiangli3@huawei.com>, 'Leeyoung' <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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Thread-Topic: [Teas] [Netslices]  terminology discussion  network slicing
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Date: Mon, 29 May 2017 13:33:32 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netslices/4bBKFaAIgjVegkzz8QZ9Bf1Giss>
Subject: Re: [Netslices] [Teas]   terminology discussion  network slicing
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Reply-To: <sebastian.thalanany@ieee.org>
From: "sebastian" <comscape@gmail.com>
To: "'Daniele Ceccarelli'" <daniele.ceccarelli@ericsson.com>, <sebastian.thalanany@ieee.org>, "'Igor Bryskin'" <Igor.Bryskin@huawei.com>, "'Jeff Tantsura'" <jefftant.ietf@gmail.com>, "'qiangli \(D\)'" <qiangli3@huawei.com>, "'Leeyoung'" <leeyoung@huawei.com>, <teas@ietf.org>
Cc: <NetSlices@ietf.org>
References: <7AEB3D6833318045B4AE71C2C87E8E172B2CA60E@SJCEML702-CHM.china.huawei.com> <97EE7243-CB44-40AD-B02D-98E07D9C79F2@juniper.net> <DB3PR07MB0588EA2B00C389E762D8C59F91E60@DB3PR07MB0588.eurprd07.prod.outlook.com> <0C72C38E7EBC34499E8A9E7DD00786390993DBF8@SJCEML702-CHM.china.huawei.com> <15c1177e0c0.27d3.9b4188e636579690ba6c69f2c8a0f1fd@labn.net> <7AEB3D6833318045B4AE71C2C87E8E172B2CC48E@SJCEML702-CHM.china.huawei.com> <AM2PR07MB099483A94CDDD068D0F86CD5F0E50@AM2PR07MB0994.eurprd07.prod.outlook.com> <0C72C38E7EBC34499E8A9E7DD0078639099515B3@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB49B9@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD007863909953AFA@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB520C@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD0078639099662D6@SJCEML702-CHM.china.huawei.com> <4B13E4DA-DB18-4454-AFC4-57A8B1264CE1@gmail.com> <0C72C38E7EBC34499E8A9E7DD00786390996673B@SJCEML702-CHM.china.huawei.com> <001501d2d7 70$f1a16180$d4e42480$@gmail.com> <AM2PR07MB09948AF604E3C7869296AEDCF0F30@AM2PR07MB0994.eurprd07.prod.outlook.com>
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Date: Mon, 29 May 2017 11:12:35 -0500
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netslices/S62LbBIKbquk94wo3momb9hJi5U>
Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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Hello, Daniele,

Appreciate your query.

Yes, the following statement, implies a network slice being instantiated =
includes the necessary resources, across any intervening core, and radio =
access networks, between a source device (entity) and a destination =
device (entity):
"The management and orchestration of resources should be capable of =
instantiating a 'network slice' with an e2e (end-to-end) scope, where =
the scope could be between two devices, connected across intervening =
radio networks and core networks that may belong to the same or =
different administrative domains."

The maximum scope of an e2e network slice instantiation, would be =
between two devices (entities), connected via intervening administrative =
domains)
Shorter spans of a network slice may be instantiated to suit other =
scenarios (e.g. between any two any entities, such as within a network, =
where one entity may require the services of another etc.)

All resources, associated with a network slice that is instantiated, may =
not be subject to virtualization (e.g. physical entities, such as =
antenna elements, which require a physical geometry.)

Many thanks.,
   Sebastian

-----Original Message-----
From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com]=20
Sent: Monday, May 29, 2017 4:01 AM
To: sebastian.thalanany@ieee.org; 'Igor Bryskin' =
<Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; =
'qiangli (D)' <qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; =
teas@ietf.org
Cc: NetSlices@ietf.org
Subject: RE: [Netslices] [Teas] terminology discussion network slicing

Hi Sebastian, Jeff, Igor, all,

I understand Jeff and Igor agree on the fact that a network slice does =
not necessarily include resources in the radio segment/domain and in the =
packet core one.
An example could be an enterprise with dedicated resources in the =
"transport" segment (e.g. VPN, VN and TE-tunnels) that connect the =
customer premises to a data center where a number of VNF (e.g. firewall, =
nat, dpi) is dedicated to that given customer.
My personal opinion is that this should be considered a network slice.

The definition of network slice should allow for this scenario and =
mostly should clearly state whether this is included or not.=20

Sebastian, I don't understand if your statement:=20
" The management and orchestration of resources should be capable of =
instantiating a 'network slice' with an e2e (end-to-end) scope, where =
the scope could be between two devices, connected across intervening =
radio networks and core networks that may belong to the same or =
different administrative domains."
implies that there must be a radio and a core segment in order to have a =
slice.

BR
Daniele =20


-----Original Message-----
From: sebastian [mailto:comscape@gmail.com]=20
Sent: domenica 28 maggio 2017 07:12
To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' =
<jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele =
Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' =
<leeyoung@huawei.com>; teas@ietf.org
Cc: NetSlices@ietf.org
Subject: RE: [Netslices] [Teas] terminology discussion network slicing

Hello, Jeff,

Agree with your view that the scope (core and/or radio layer) of a =
'network slice' could vary depending on the triggers for instantiating =
the 'network slice'.

On the other hand the instantiation of a 'network slice' may also be e2e =
(end-to-end), such as in device roaming scenarios, or in the case of =
vertical services that span different service providers.

The span of a 'network slice' is only limited by the availability of =
resources and appropriate policies (e.g. SLAs), independent of whether =
those resources are in the core network layer or in the radio network =
layer.

The management and orchestration of resources should be capable of =
instantiating a 'network slice' with an e2e (end-to-end) scope, where =
the scope could be between two devices, connected across intervening =
radio networks and core networks that may belong to the same or =
different administrative domains.

Many thanks.
-Sebastian


-----Original Message-----
From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor =
Bryskin
Sent: Wednesday, May 24, 2017 7:56 AM
To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) =
<qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Netslices] [Teas] terminology discussion network slicing

Thanks Jeff,

I am glad we are in sync.

Igor

-----Original Message-----
From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]=20
Sent: Wednesday, May 24, 2017 8:45 AM
To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Teas] terminology discussion network slicing

+1 Igor

>From transport side (L0-L3) we need to expose set of API=E2=80=99s that =
would allow to request a set of resources (a slice) either virtualized =
of physical that meet the constrains as requested by the business logic. =
Radio, while would definitely be one of most important use cases, would =
not be exclusively for radio use only. Any network management/ =
orchestration layer ideally should be able to use same set of =
API=E2=80=99s to request an e2e service.

Cheers,
Jeff
=20

On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" =
<teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:

    Hi Cristina,
   =20
    I didn=E2=80=99t say that ns has nothing to do with radio. I said =
that ns *may* have nothing to do with radio, i.e. may support/enable =
network architectures that do not involve radio necessarily.
   =20
    Igor
   =20
    -----Original Message-----
    From: qiangli (D)=20
    Sent: Wednesday, May 24, 2017 5:05 AM
    To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion network =
slicing
   =20
    Hi Igor,
   =20
    I share the same opinion on 5G and network slicing, but can't see =
the relation between this opinion and your conclusion that ns has =
nothing to do with radio.
   =20
    Best regards,
   =20
    Cristina QIANG
   =20
   =20
    -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    =E5=8F=91=E4=BB=B6=E4=BA=BA: Igor Bryskin=20
    =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 23:50
    =E6=94=B6=E4=BB=B6=E4=BA=BA: qiangli (D); Daniele Ceccarelli; =
Leeyoung; teas@ietf.org
    =E6=8A=84=E9=80=81: NetSlices@ietf.org
    =E4=B8=BB=E9=A2=98: RE: [Teas] terminology discussion network =
slicing
   =20
    Hi Cristina,
   =20
    People whose opinion I respect very much told me that even the 3GPP =
network slicing definition and effort is not 5G specific.  Network =
slicing is viewed as an important capability of 5G, but it could serve =
other architectures.
   =20
    Cheers,
    Igor
   =20
    -----Original Message-----
    From: qiangli (D)
    Sent: Saturday, May 20, 2017 5:27 AM
    To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion network =
slicing
   =20
    Hi Igor,
   =20
    I have different opinion on " Network slicing may have nothing to do =
with radio".
    IMO, network slicing should be a resource-oriented management mode. =
The end-to-end network slice (from UE to server/other UE) of course =
involves the radio resource, usually we use the word "RAN-radio access =
network" rather than simply say "radio". The Frequency band, time, code, =
equipment/site, and software are a number of dimensions, in which RAN =
resources can be isolated [Online available =
http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-se=
rvice-guaranteed-network-slicing-whitepaper].
   =20
    Best regards,
   =20
    Qiang, Li (Cristina)
    NetLab, Huawei
   =20
   =20
    -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    =E5=8F=91=E4=BB=B6=E4=BA=BA: Netslices =
[mailto:netslices-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Igor Bryskin
    =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 6:12
    =E6=94=B6=E4=BB=B6=E4=BA=BA: Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
    =E6=8A=84=E9=80=81: NetSlices@ietf.org
    =E4=B8=BB=E9=A2=98: Re: [Netslices] [Teas] terminology discussion =
network slicing
   =20
    Hi Danielle,
   =20
    Network slicing may have nothing to do with radio. 5g is just a big =
reason as to why the interest/focus is back on network slicing, which is =
a very old concept. I don't think that anyone is arguing with what you =
wrote. The questions are:
    a) how do you manage these "pieces"?
    b) what policy infrastructure should be put in place?
    c) how do you ensure their separation or, conversely, the degree of =
resource sharing?
    d) why exactly legacy VPNs are not good enough?
   =20
    Cheers,
    Igor
   =20
   =20
     =20
   =20
    -----Original Message-----
    From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele =
Ceccarelli
    Sent: Friday, May 19, 2017 4:19 PM
    To: Leeyoung; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: Re: [Teas] terminology discussion network slicing
   =20
    Hi Young, all,
   =20
    i agree with your conclusion but would like to clarify one thing =
that IMO got lost in the discussion since its beginning.
   =20
    The 3GPP definition says:=20
    "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."
   =20
    This means that a network slice IS NOT a VPN or a TE Tunnel.
    A network slice is "something" (netslices and 3GPP will define what =
this something is) that is composed by a "piece" in the RADIO domain, a =
"piece" in the CLOUD domain, a "piece" in the TRANSPORT domain, plus =
possible other pieces in possible other domains.
   =20
    The word "transport" can be misleading here since one could think of =
transport technologies (e.g. WDM, OTN), but what I'm referring to as =
TRANSPORT DOMAIN is that part of the network that is used to carry a =
packet between two other domains.=20
    In order to have a slice, that portion of the transport domain needs =
to be engineered, hence it is all about building a TE entity and =
stitching services to such entity. This is what is in the ACTN scope.
   =20
    My very personal opinion is that whatever belongs to the transport =
domain belongs to IETF (and is already being addressed), while the rest =
is a dangerous duplication of concepts standardized is other SDOs...but =
this is another discussion that doesn't fit here.
   =20
    BR
    Daniele =20
   =20
   =20
    -----Original Message-----
    From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
    Sent: venerd=C3=AC 19 maggio 2017 15:15
    To: teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: Re: [Teas] terminology discussion network slicing
   =20
    Hi,
   =20
    Lou is right. There is a dedicated email list for the discussion of =
"network slicing (cc'ed)" and the discussion about what that term means =
should be held on that list.=20
   =20
    We have used similar language in draft-ietf-teas-actn-framework =
right from the
    00 version. Recent changes have been an attempt to clarify what the =
terminology means in the context of ACTN. We are not trying to define or =
redefine "network slicing" in the ACTN document, but are trying to make =
it clear how ACTN works.
   =20
    Therefore I propose the following resolution:
   =20
    1. All discussion of the general applicability and definition of =
"network slicing" is held on the netslices mailing list.
   =20
    2. We adopt Adrian's suggestion to explain that the scope of the =
definition of the terms used in the ACTN framework is limited to ACTN. =
That means effectively that if there are components of a wider =
definition of network slicing that are not supported by ACTN, that will =
be OK.=20
   =20
    I propose to post an updated version in the next few days and I =
believe that will allow this draft to move ahead without being blocked =
by the discussion in netslices. Once the IETF has a stable definition of =
network slicing we can return and see how ACTN is applicable to that =
definition an whether more wok is need (in a separate draft).
   =20
    Thanks,
    Young
   =20
    -----Original Message-----
    From: Lou Berger [mailto:lberger@labn.net]
    Sent: Tuesday, May 16, 2017 8:35 AM
    To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - =
IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel =
<ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
    Subject: Re: [Teas] terminology discussion network slicing
   =20
    Perhaps it's time to bring the discussion to the slicing list and =
report back their reaponse....
   =20
    Lou
   =20
   =20
    On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> =
wrote:
   =20
    > Hi Sergio,
    >
    > I would also like to hear more from network slicing experts.
    >
    > My understanding is that the difference in the separation (in =
terms of=20
    > control and data planes, security, etc.). For example, traditional =
BGP=20
    > based L3 VPNs (that use provider's common control plane for their=20
    > management and IP/MPLS TE tunnels to inter-connect their PEs) will =

    > probably not be able guarantee for the clients msec range =
connectivity=20
    > setup times required by 5g, while provided by the same provider =
fully=20
    > separated/genuinely private IP/MPLS networks (that do not share=20
    > IP/MPLS control plane and infrastructure, whose network topology =
is=20
    > supported by separate L0/L1 connections) hopefully will be able to =

    > provide such guarantees. Therefore, I define layer network slices =
as=20
    > dynamically managed fully isolated in control and data planes =
private=20
    > TE layer networks, which may share one or more underlying server =
layer networks.
    >
    >
    > Cheers,
    > Igor
    >
    >
    >
    >
    > -----Original Message-----
    > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, =
Sergio=20
    > (Nokia - IT/Vimercate)
    > Sent: Tuesday, May 16, 2017 6:08 AM
    > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
    > Subject: Re: [Teas] terminology discussion network slicing
    >
    > Hi Gert,
    >
    > "Thinking a bit about it I came to the point where "VPN" and =
"network=20
    > slices" seem to describe the same entity or at least a "network =
slice"
    > being a VPN of VPNs?"
    >
    > I share completely your conclusion , I'd like if someone can =
explain=20
    > if a difference really exists .
    >
    > Thanks
    > Sergio
    >
    >
    > -----Original Message-----
    > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert =
Grammel
    > Sent: Monday, May 15, 2017 7:02 PM
    > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
    > Subject: Re: [Teas] terminology discussion network slicing
    >
    > Leeyoung,
    >
    > Thank you for taking a stab on this. Usually when getting to a=20
    > definition, I try to establish what kind of existing constructs =
would=20
    > fall under the definition. If my understanding is correct, the=20
    > following list of constructs would all satisfy the definition =
somehow.
    > - A TDM network with a p2p TDM connection
    > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
    > - An MPLS LSP using a traffic engineered IP network
    > - A L2VPN using a traffic engineered MPLS network
    > - A L3VPN using a traffic engineered IP network
    > - A TCP connection using a traffic engineered IP network
    > - Different QoS classes in an IP network
    >
    > Thinking a bit about it I came to the point where "VPN" and =
"network=20
    > slices" seem to describe the same entity or at least a "network =
slice"
    > being a VPN of VPNs?
    >
    > Gert
    >
    >
    > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"=20
    > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
    >
    >     Hi Adrian and others,
    >
    >     We'd like cross check with you on some terminology we =
introduced newly. Any=20
    >     comment on these terms will be greatly appreciated.
    >
    >     We introduced 'network slicing' as follows:
    >
    >             Network slicing is a collection of resources
    >             that are used to establish logically dedicated virtual =
networks
    >             over TE networks. It allows a network provider to =
provide
    >             dedicated virtual networks for application/customer =
over a
    >             common network infrastructure. The logically dedicated
    >             resources are a part of the larger common network
    >             infrastructures that are shared among various network =
slice
    >             instances which are the end-to-end realization of =
network
    >             slicing, consisting of the combination of physically =
or
    >             logically dedicated resources.
    >
    >
    >     Thanks.
    >     Young and Daniele
    >     -----Original Message-----
    >     From: Leeyoung
    >     Sent: Friday, May 05, 2017 1:41 PM
    >     To: teas@ietf.org
    >     Subject: RE: [Teas] I-D Action:=20
    > draft-ietf-teas-actn-framework-05.txt
    >
    >     Hi,
    >
    >     This update is intended to incorporate the comments from the =
last WG=20
    >     meeting and any pending issues. We also have taken the global =
editorial=20
    >     changes to make it consistent through the document. Major =
changes are:
    >
    >     - Inclusion of "network slicing" definition from ACTN =
perspective (in the=20
    >     terminology section)
    >     - Added virtual network service (VNS) section (Section 3) to =
define types=20
    >     of VNS.
    >     - Incorporated "orchestration" (service/network) mapping to =
ACTN=20
    >     architecture (See Section 5.2)
    >     - Created a new section 6 (Topology Abstraction Method) where =
we imported=20
    >     some texts from ACTN abstraction method =20
    >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
    >     - Added Appendices A & B to discuss example deployment =
scenarios such as=20
    >     example of MDSC and PNC functions integrated in =
Service/Network=20
    >     Orchestrator (Appendix A) and example of IP + Optical network =
with L3VPN=20
    >     service (Appendix B)
    >
    >     In regard to ACTN abstraction method draft, we are going to =
keep it as a=20
    >     separate draft and use this document to elaborate other =
aspects not=20
    >     imported to the framework document.
    >
    >     The following diff pointer will help you see the changes with =
this revision:
    >    =20
    > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >
    >     The co-authors believe that the document is ready for WG LC. =
Any=20
    >     changes/comments will be appreciated.
    >
    >     Thanks & Best regards,
    >     Young & Daniele (on behalf of other co-authors/contributors)
    >
    >     -----Original Message-----
    >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
internet-drafts@ietf.org
    >     Sent: Friday, May 05, 2017 10:41 AM
    >     To: i-d-announce@ietf.org
    >     Cc: teas@ietf.org
    >     Subject: [Teas] I-D Action: =
draft-ietf-teas-actn-framework-05.txt
    >
    >
    >     A New Internet-Draft is available from the on-line =
Internet-Drafts directories.
    >     This draft is a work item of the Traffic Engineering =
Architecture and=20
    >     Signaling of the IETF.
    >
    >             Title           : Framework for Abstraction and =
Control of Traffic=20
    >             Engineered Networks
    >             Authors         : Daniele Ceccarelli
    >                               Young Lee
    >     	Filename        : draft-ietf-teas-actn-framework-05.txt
    >     	Pages           : 41
    >     	Date            : 2017-05-05
    >
    >     Abstract:
    >        Traffic Engineered networks have a variety of mechanisms to
    >        facilitate the separation of the data plane and control =
plane. They
    >        also have a range of management and provisioning protocols =
to
    >        configure and activate network resources.  These mechanisms
    >        represent key technologies for enabling flexible and =
dynamic
    >        networking.
    >
    >        Abstraction of network resources is a technique that can be =
applied
    >        to a single network domain or across multiple domains to =
create a
    >        single virtualized network that is under the control of a =
network
    >        operator or the customer of the operator that actually owns
    >        the network resources.
    >
    >        This document provides a framework for Abstraction and =
Control of
    >        Traffic Engineered Networks (ACTN).
    >
    >
    >
    >     The IETF datatracker status page for this draft is:
    >     =
https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
    >
    >     There are also htmlized versions available at:
    >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
    >    =20
    > =
https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
    > 5
    >
    >     A diff from the previous version is available at:
    >    =20
    > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >
    >
    >     Please note that it may take a couple of minutes from the time =
of=20
    >     submission until the htmlized version and diff are available =
at tools.ietf.org.
    >
    >     Internet-Drafts are also available by anonymous FTP at:
    >     ftp://ftp.ietf.org/internet-drafts/
    >
    >     _______________________________________________
    >     Teas mailing list
    >     Teas@ietf.org
    >     https://www.ietf.org/mailman/listinfo/teas
    >
    >     _______________________________________________
    >     Teas mailing list
    >     Teas@ietf.org
    >     https://www.ietf.org/mailman/listinfo/teas
    >
    >
    > _______________________________________________
    > Teas mailing list
    > Teas@ietf.org
    > https://www.ietf.org/mailman/listinfo/teas
    >
    > _______________________________________________
    > Teas mailing list
    > Teas@ietf.org
    > https://www.ietf.org/mailman/listinfo/teas
    >
    > _______________________________________________
    > Teas mailing list
    > Teas@ietf.org
    > https://www.ietf.org/mailman/listinfo/teas
    >
   =20
   =20
    _______________________________________________
    Teas mailing list
    Teas@ietf.org
    https://www.ietf.org/mailman/listinfo/teas
   =20
    _______________________________________________
    Teas mailing list
    Teas@ietf.org
    https://www.ietf.org/mailman/listinfo/teas
   =20
    _______________________________________________
    Netslices mailing list
    Netslices@ietf.org
    https://www.ietf.org/mailman/listinfo/netslices
    _______________________________________________
    Teas mailing list
    Teas@ietf.org
    https://www.ietf.org/mailman/listinfo/teas
   =20


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From: "Flinck, Hannu (Nokia - FI/Espoo)" <hannu.flinck@nokia-bell-labs.com>
To: "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, "'Igor Bryskin'" <Igor.Bryskin@huawei.com>, 'Jeff Tantsura' <jefftant.ietf@gmail.com>, "'qiangli (D)'" <qiangli3@huawei.com>, "'Daniele Ceccarelli'" <daniele.ceccarelli@ericsson.com>, 'Leeyoung' <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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Thread-Topic: [Netslices] [Teas] terminology discussion  network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion  network slicing
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: Gert Grammel <ggrammel@juniper.net>, "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, 'Igor Bryskin' <Igor.Bryskin@huawei.com>, 'Jeff Tantsura' <jefftant.ietf@gmail.com>, "'qiangli (D)'" <qiangli3@huawei.com>, 'Leeyoung' <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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Thread-Topic: [Teas] [Netslices]  terminology discussion  network slicing
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Date: Tue, 30 May 2017 08:17:37 +0000
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Subject: Re: [Netslices] [Teas]   terminology discussion  network slicing
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From: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>
To: "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, "'Igor Bryskin'" <Igor.Bryskin@huawei.com>, 'Jeff Tantsura' <jefftant.ietf@gmail.com>, "'qiangli (D)'" <qiangli3@huawei.com>, 'Leeyoung' <leeyoung@huawei.com>, "teas@ietf.org" <teas@ietf.org>
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Thread-Topic: [Teas] [Netslices]  terminology discussion  network slicing
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Subject: Re: [Netslices] [Teas]   terminology discussion  network slicing
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From: Gert Grammel <ggrammel@juniper.net>
To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>, "teas@ietf.org" <teas@ietf.org>
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Thread-Topic: [Teas] [Netslices]  terminology discussion  network slicing
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Subject: Re: [Netslices] [Teas]   terminology discussion  network slicing
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Reply-To: <sebastian.thalanany@ieee.org>
From: "sebastian" <comscape@gmail.com>
To: "'Gert Grammel'" <ggrammel@juniper.net>, "'Daniele Ceccarelli'" <daniele.ceccarelli@ericsson.com>, <teas@ietf.org>
Cc: <NetSlices@ietf.org>
References: <7AEB3D6833318045B4AE71C2C87E8E172B2CA60E@SJCEML702-CHM.china.huawei.com> <97EE7243-CB44-40AD-B02D-98E07D9C79F2@juniper.net> <DB3PR07MB0588EA2B00C389E762D8C59F91E60@DB3PR07MB0588.eurprd07.prod.outlook.com> <0C72C38E7EBC34499E8A9E7DD00786390993DBF8@SJCEML702-CHM.china.huawei.com> <15c1177e0c0.27d3.9b4188e636579690ba6c69f2c8a0f1fd@labn.net> <7AEB3D6833318045B4AE71C2C87E8E172B2CC48E@SJCEML702-CHM.china.huawei.com> <AM2PR07MB099483A94CDDD068D0F86CD5F0E50@AM2PR07MB0994.eurprd07.prod.outlook.com> <0C72C38E7EBC34499E8A9E7DD0078639099515B3@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB49B9@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD007863909953AFA@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB520C@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD0078639099662D6@SJCEML702-CHM.china.huawei.com> <4B13E4DA-DB18-4454-AFC4-57A8B1264CE1@gmail.com> <0C72C38E7EBC34499E8A9E7DD00786390996673B@SJCEML702-CHM.china.huawei.com> <001501d2d7 70$f1a16180$d4e42480$@gmail.com> <AM2PR07MB09948AF604E3C7869296AEDCF0F30@AM2PR07MB0994.eurprd07.prod.outlook.com> <7625E93C-8E51-4B2F-B28C-FB2A5287FD99@juniper.net> <VI1PR07MB1005262C6FC0CC75EF9D3AA1F0F00@VI1PR07MB1005.eurprd07.prod.outlook.com> <AB42001E-4A0E-4019-A373-D46BAB1ECB78@juniper.net>
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Subject: Re: [Netslices] [Teas]   terminology discussion  network slicing
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Hello, Gert,

Good points.

There are various instantiations of a 'network slice' that are likely, =
based on a diverse array of usage scenarios.
These diverse instantiations of a 'network slice', with a corresponding =
allocation of the required logical or physical resources, should be =
allowed to suit different usage scenarios that may range from a =
'segment' to 'e2e' (end-to-end), in a 5G ecosystem.

Hence a generalized definition for the instantiation of a 'network =
slice' such as the one referred to below (3GPP) is reasonable:
    "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."

Many thanks.
-Sebastian

-----Original Message-----
From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert =
Grammel
Sent: Tuesday, May 30, 2017 6:17 AM
To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; teas@ietf.org
Cc: NetSlices@ietf.org
Subject: Re: [Netslices] [Teas] terminology discussion network slicing

Hi Daniele,

See below for more details:

On 2017-05-30, 10:17, "Daniele Ceccarelli" =
<daniele.ceccarelli@ericsson.com> wrote:

    Ciao Gert,
   =20
    Please see in line
    Cheers
    Daniele =20
   =20
   =20
    -----Original Message-----
    From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
    Sent: luned=C3=AC 29 maggio 2017 15:34
    To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; =
sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; =
'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' =
<qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
    Cc: NetSlices@ietf.org
    Subject: Re: [Teas] [Netslices] terminology discussion network =
slicing
   =20
    Daniele,
   =20
    Trying to summarize what you're saying: a Network slice is an =
overlay network with minimum service guarantees, including virtual =
network functions available in this overlay network. =20
    [>DC] why do you speak about an overlay network? If for example you =
have a site connected with a lambda to a data center and there you have =
a number of VNF, that's IMO a slice but there is no overlay. I'd say =
that there could be an overlay but that's not mandatory.
GGR> A Lambda travels through a WDM which is a Multiplexer (see =
discussion below). So a lambda is in my view an overlay, the multiplexed =
signal (OMS) being the underlay.   =20



    In your text I have issues with "dedicated to a given customer". =
Whether such construct is dedicated to one or shared among several legal =
customers shouldn't be of concern for the definition of a Network Slice.
    [>DC] Correct, it should be possible to have it dedicated or shared. =
We just need to make sure that both options are supported. =20
GGR>> So if it can either be dedicated or shared, why mentioning this at =
all? Is there anything else?   =20

    On similar terms, whether a resource (being a NF or transport =
capacity) is shared or not is a design choice rather than a definition. =
In particular, Multiplexer by definition share some sort of common =
capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the =
nature of multiplexing technique shouldn't be a definition criteria for =
a Network Slice either.
   =20
    Another food for thought:
    - I would also add that a network slice may use it's own internal =
addressing scheme isolated from other slices. While this is optional, I =
would expect it to be used quite often.=20
    [>DC] agree. Ala VPN.

    - Why is it necessary to dedicate resources to a "Network Slice" at =
all? If e.g. a firewall NFV is in the DC and communicates over the =
Internet with a CPE (both belonging to a single owner) it would not =
fulfil the criteria of dedicated resource (Internet after all isn't =
dedicated), but it still looks pretty much like a "network slice".

    [>DC] Think of remote surgery...wouldn't you want every single part =
of the end to end network from the doctor's hands to the scalpel being =
totally dedicated? :) ...and in that case I don't think the packets =
would go through the internet
GGR>> There are a few issues here:
1)	this example looks a bit out-dated to me. There is only a one-to-one =
relationship between doctor and patient. This is what I would call a =
classical client-server model with protected resources. Ask for SONET =
leased line circuits if this is what a "slice" would mean. In defining =
what constitutes a slice you would also have to think about what =
constitutes a "doctor-slice" and what would be a "patient-slice"? =
(assuming responsible health care to avoid sarcastic interpretation)
2)	The question asked in my earlier email is whether the packets *must* =
go through a dedicated resource to call the thing "slice". In other =
words, if a thing that uses a non-dedicated "underlay" resource like the =
Internet can be called "slice" too? It is puzzling to me why the =
definition of "slice" would need any dedicated resource at all. It is in =
the end an implementers choice how much dedicated equipment is needed to =
provide a service. So why a slice has to use "dedicated resources", and =
what kind of "dedication" is meant? (See our earlier discussion about =
WDM)? Take your mobile as an example. It supports telephony and email. =
Those are different apps, potentially running in different VMs.=20
a.	Is your phone a shared device or a dedicated one?=20
b.	does using different apps means to use a different slices?
c.	If you write emails to different recipients, would that qualify your =
email to be "dedicated", hence a different slice, just because they are =
in different address books?
d.	If you switch from 3G to VoIP, does it mean to switch the slice, even =
if it is the same app?

GGR> My thinking is that the definition of "slice" needs to make =
practical sense. The 3GPP definition is probably a bit too high level =
but makes sense to me:
    "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."

    Gert=20
   =20
    On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" =
<teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> =
wrote:
   =20
        Hi Sebastian, Jeff, Igor, all,
       =20
        I understand Jeff and Igor agree on the fact that a network =
slice does not necessarily include resources in the radio segment/domain =
and in the packet core one.
        An example could be an enterprise with dedicated resources in =
the "transport" segment (e.g. VPN, VN and TE-tunnels) that connect the =
customer premises to a data center where a number of VNF (e.g. firewall, =
nat, dpi) is dedicated to that given customer.
        My personal opinion is that this should be considered a network =
slice.
       =20
        The definition of network slice should allow for this scenario =
and mostly should clearly state whether this is included or not.=20
       =20
        Sebastian, I don't understand if your statement:=20
        " The management and orchestration of resources should be =
capable of instantiating a 'network slice' with an e2e (end-to-end) =
scope, where the scope could be between two devices, connected across =
intervening radio networks and core networks that may belong to the same =
or different administrative domains."
        implies that there must be a radio and a core segment in order =
to have a slice.
       =20
        BR
        Daniele =20
       =20
       =20
        -----Original Message-----
        From: sebastian [mailto:comscape@gmail.com]=20
        Sent: domenica 28 maggio 2017 07:12
        To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' =
<jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele =
Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' =
<leeyoung@huawei.com>; teas@ietf.org
        Cc: NetSlices@ietf.org
        Subject: RE: [Netslices] [Teas] terminology discussion network =
slicing
       =20
        Hello, Jeff,
       =20
        Agree with your view that the scope (core and/or radio layer) of =
a 'network slice' could vary depending on the triggers for instantiating =
the 'network slice'.
       =20
        On the other hand the instantiation of a 'network slice' may =
also be e2e (end-to-end), such as in device roaming scenarios, or in the =
case of vertical services that span different service providers.
       =20
        The span of a 'network slice' is only limited by the =
availability of resources and appropriate policies (e.g. SLAs), =
independent of whether those resources are in the core network layer or =
in the radio network layer.
       =20
        The management and orchestration of resources should be capable =
of instantiating a 'network slice' with an e2e (end-to-end) scope, where =
the scope could be between two devices, connected across intervening =
radio networks and core networks that may belong to the same or =
different administrative domains.
       =20
        Many thanks.
        -Sebastian
       =20
       =20
        -----Original Message-----
        From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of =
Igor Bryskin
        Sent: Wednesday, May 24, 2017 7:56 AM
        To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) =
<qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org
        Cc: NetSlices@ietf.org
        Subject: Re: [Netslices] [Teas] terminology discussion network =
slicing
       =20
        Thanks Jeff,
       =20
        I am glad we are in sync.
       =20
        Igor
       =20
        -----Original Message-----
        From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]=20
        Sent: Wednesday, May 24, 2017 8:45 AM
        To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
        Cc: NetSlices@ietf.org
        Subject: Re: [Teas] terminology discussion network slicing
       =20
        +1 Igor
       =20
        From transport side (L0-L3) we need to expose set of =
API=E2=80=99s that would allow to request a set of resources (a slice) =
either virtualized of physical that meet the constrains as requested by =
the business logic. Radio, while would definitely be one of most =
important use cases, would not be exclusively for radio use only. Any =
network management/ orchestration layer ideally should be able to use =
same set of API=E2=80=99s to request an e2e service.
       =20
        Cheers,
        Jeff
        =20
       =20
        On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" =
<teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
       =20
            Hi Cristina,
           =20
            I didn=E2=80=99t say that ns has nothing to do with radio. I =
said that ns *may* have nothing to do with radio, i.e. may =
support/enable network architectures that do not involve radio =
necessarily.
           =20
            Igor
           =20
            -----Original Message-----
            From: qiangli (D)=20
            Sent: Wednesday, May 24, 2017 5:05 AM
            To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
            Cc: NetSlices@ietf.org
            Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion =
network slicing
           =20
            Hi Igor,
           =20
            I share the same opinion on 5G and network slicing, but =
can't see the relation between this opinion and your conclusion that ns =
has nothing to do with radio.
           =20
            Best regards,
           =20
            Cristina QIANG
           =20
           =20
            -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
            =E5=8F=91=E4=BB=B6=E4=BA=BA: Igor Bryskin=20
            =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 23:50
            =E6=94=B6=E4=BB=B6=E4=BA=BA: qiangli (D); Daniele =
Ceccarelli; Leeyoung; teas@ietf.org
            =E6=8A=84=E9=80=81: NetSlices@ietf.org
            =E4=B8=BB=E9=A2=98: RE: [Teas] terminology discussion =
network slicing
           =20
            Hi Cristina,
           =20
            People whose opinion I respect very much told me that even =
the 3GPP network slicing definition and effort is not 5G specific.  =
Network slicing is viewed as an important capability of 5G, but it could =
serve other architectures.
           =20
            Cheers,
            Igor
           =20
            -----Original Message-----
            From: qiangli (D)
            Sent: Saturday, May 20, 2017 5:27 AM
            To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
            Cc: NetSlices@ietf.org
            Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion =
network slicing
           =20
            Hi Igor,
           =20
            I have different opinion on " Network slicing may have =
nothing to do with radio".
            IMO, network slicing should be a resource-oriented =
management mode. The end-to-end network slice (from UE to server/other =
UE) of course involves the radio resource, usually we use the word =
"RAN-radio access network" rather than simply say "radio". The Frequency =
band, time, code, equipment/site, and software are a number of =
dimensions, in which RAN resources can be isolated [Online available =
http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-se=
rvice-guaranteed-network-slicing-whitepaper].
           =20
            Best regards,
           =20
            Qiang, Li (Cristina)
            NetLab, Huawei
           =20
           =20
            -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
            =E5=8F=91=E4=BB=B6=E4=BA=BA: Netslices =
[mailto:netslices-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Igor Bryskin
            =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 6:12
            =E6=94=B6=E4=BB=B6=E4=BA=BA: Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
            =E6=8A=84=E9=80=81: NetSlices@ietf.org
            =E4=B8=BB=E9=A2=98: Re: [Netslices] [Teas] terminology =
discussion network slicing
           =20
            Hi Danielle,
           =20
            Network slicing may have nothing to do with radio. 5g is =
just a big reason as to why the interest/focus is back on network =
slicing, which is a very old concept. I don't think that anyone is =
arguing with what you wrote. The questions are:
            a) how do you manage these "pieces"?
            b) what policy infrastructure should be put in place?
            c) how do you ensure their separation or, conversely, the =
degree of resource sharing?
            d) why exactly legacy VPNs are not good enough?
           =20
            Cheers,
            Igor
           =20
           =20
             =20
           =20
            -----Original Message-----
            From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Daniele Ceccarelli
            Sent: Friday, May 19, 2017 4:19 PM
            To: Leeyoung; teas@ietf.org
            Cc: NetSlices@ietf.org
            Subject: Re: [Teas] terminology discussion network slicing
           =20
            Hi Young, all,
           =20
            i agree with your conclusion but would like to clarify one =
thing that IMO got lost in the discussion since its beginning.
           =20
            The 3GPP definition says:=20
            "A set of network functions and the resources for these =
network functions which are arranged and configured, forming a complete =
logical network to meet certain network characteristics."
           =20
            This means that a network slice IS NOT a VPN or a TE Tunnel.
            A network slice is "something" (netslices and 3GPP will =
define what this something is) that is composed by a "piece" in the =
RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT =
domain, plus possible other pieces in possible other domains.
           =20
            The word "transport" can be misleading here since one could =
think of transport technologies (e.g. WDM, OTN), but what I'm referring =
to as TRANSPORT DOMAIN is that part of the network that is used to carry =
a packet between two other domains.=20
            In order to have a slice, that portion of the transport =
domain needs to be engineered, hence it is all about building a TE =
entity and stitching services to such entity. This is what is in the =
ACTN scope.
           =20
            My very personal opinion is that whatever belongs to the =
transport domain belongs to IETF (and is already being addressed), while =
the rest is a dangerous duplication of concepts standardized is other =
SDOs...but this is another discussion that doesn't fit here.
           =20
            BR
            Daniele =20
           =20
           =20
            -----Original Message-----
            From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Leeyoung
            Sent: venerd=C3=AC 19 maggio 2017 15:15
            To: teas@ietf.org
            Cc: NetSlices@ietf.org
            Subject: Re: [Teas] terminology discussion network slicing
           =20
            Hi,
           =20
            Lou is right. There is a dedicated email list for the =
discussion of "network slicing (cc'ed)" and the discussion about what =
that term means should be held on that list.=20
           =20
            We have used similar language in =
draft-ietf-teas-actn-framework right from the
            00 version. Recent changes have been an attempt to clarify =
what the terminology means in the context of ACTN. We are not trying to =
define or redefine "network slicing" in the ACTN document, but are =
trying to make it clear how ACTN works.
           =20
            Therefore I propose the following resolution:
           =20
            1. All discussion of the general applicability and =
definition of "network slicing" is held on the netslices mailing list.
           =20
            2. We adopt Adrian's suggestion to explain that the scope of =
the definition of the terms used in the ACTN framework is limited to =
ACTN. That means effectively that if there are components of a wider =
definition of network slicing that are not supported by ACTN, that will =
be OK.=20
           =20
            I propose to post an updated version in the next few days =
and I believe that will allow this draft to move ahead without being =
blocked by the discussion in netslices. Once the IETF has a stable =
definition of network slicing we can return and see how ACTN is =
applicable to that definition an whether more wok is need (in a separate =
draft).
           =20
            Thanks,
            Young
           =20
            -----Original Message-----
            From: Lou Berger [mailto:lberger@labn.net]
            Sent: Tuesday, May 16, 2017 8:35 AM
            To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio =
(Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel =
<ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
            Subject: Re: [Teas] terminology discussion network slicing
           =20
            Perhaps it's time to bring the discussion to the slicing =
list and report back their reaponse....
           =20
            Lou
           =20
           =20
            On May 16, 2017 8:31:19 AM Igor Bryskin =
<Igor.Bryskin@huawei.com> wrote:
           =20
            > Hi Sergio,
            >
            > I would also like to hear more from network slicing =
experts.
            >
            > My understanding is that the difference in the separation =
(in terms of=20
            > control and data planes, security, etc.). For example, =
traditional BGP=20
            > based L3 VPNs (that use provider's common control plane =
for their=20
            > management and IP/MPLS TE tunnels to inter-connect their =
PEs) will=20
            > probably not be able guarantee for the clients msec range =
connectivity=20
            > setup times required by 5g, while provided by the same =
provider fully=20
            > separated/genuinely private IP/MPLS networks (that do not =
share=20
            > IP/MPLS control plane and infrastructure, whose network =
topology is=20
            > supported by separate L0/L1 connections) hopefully will be =
able to=20
            > provide such guarantees. Therefore, I define layer network =
slices as=20
            > dynamically managed fully isolated in control and data =
planes private=20
            > TE layer networks, which may share one or more underlying =
server layer networks.
            >
            >
            > Cheers,
            > Igor
            >
            >
            >
            >
            > -----Original Message-----
            > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Belotti, Sergio=20
            > (Nokia - IT/Vimercate)
            > Sent: Tuesday, May 16, 2017 6:08 AM
            > To: Gert Grammel; Leeyoung; teas@ietf.org; =
adrian@olddog.co.uk
            > Subject: Re: [Teas] terminology discussion network slicing
            >
            > Hi Gert,
            >
            > "Thinking a bit about it I came to the point where "VPN" =
and "network=20
            > slices" seem to describe the same entity or at least a =
"network slice"
            > being a VPN of VPNs?"
            >
            > I share completely your conclusion , I'd like if someone =
can explain=20
            > if a difference really exists .
            >
            > Thanks
            > Sergio
            >
            >
            > -----Original Message-----
            > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Gert Grammel
            > Sent: Monday, May 15, 2017 7:02 PM
            > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
            > Subject: Re: [Teas] terminology discussion network slicing
            >
            > Leeyoung,
            >
            > Thank you for taking a stab on this. Usually when getting =
to a=20
            > definition, I try to establish what kind of existing =
constructs would=20
            > fall under the definition. If my understanding is correct, =
the=20
            > following list of constructs would all satisfy the =
definition somehow.
            > - A TDM network with a p2p TDM connection
            > - A PSC capable network carrying a p2p circuit (such as =
EPL/EVPL)
            > - An MPLS LSP using a traffic engineered IP network
            > - A L2VPN using a traffic engineered MPLS network
            > - A L3VPN using a traffic engineered IP network
            > - A TCP connection using a traffic engineered IP network
            > - Different QoS classes in an IP network
            >
            > Thinking a bit about it I came to the point where "VPN" =
and "network=20
            > slices" seem to describe the same entity or at least a =
"network slice"
            > being a VPN of VPNs?
            >
            > Gert
            >
            >
            > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"=20
            > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> =
wrote:
            >
            >     Hi Adrian and others,
            >
            >     We'd like cross check with you on some terminology we =
introduced newly. Any=20
            >     comment on these terms will be greatly appreciated.
            >
            >     We introduced 'network slicing' as follows:
            >
            >             Network slicing is a collection of resources
            >             that are used to establish logically dedicated =
virtual networks
            >             over TE networks. It allows a network provider =
to provide
            >             dedicated virtual networks for =
application/customer over a
            >             common network infrastructure. The logically =
dedicated
            >             resources are a part of the larger common =
network
            >             infrastructures that are shared among various =
network slice
            >             instances which are the end-to-end realization =
of network
            >             slicing, consisting of the combination of =
physically or
            >             logically dedicated resources.
            >
            >
            >     Thanks.
            >     Young and Daniele
            >     -----Original Message-----
            >     From: Leeyoung
            >     Sent: Friday, May 05, 2017 1:41 PM
            >     To: teas@ietf.org
            >     Subject: RE: [Teas] I-D Action:=20
            > draft-ietf-teas-actn-framework-05.txt
            >
            >     Hi,
            >
            >     This update is intended to incorporate the comments =
from the last WG=20
            >     meeting and any pending issues. We also have taken the =
global editorial=20
            >     changes to make it consistent through the document. =
Major changes are:
            >
            >     - Inclusion of "network slicing" definition from ACTN =
perspective (in the=20
            >     terminology section)
            >     - Added virtual network service (VNS) section (Section =
3) to define types=20
            >     of VNS.
            >     - Incorporated "orchestration" (service/network) =
mapping to ACTN=20
            >     architecture (See Section 5.2)
            >     - Created a new section 6 (Topology Abstraction =
Method) where we imported=20
            >     some texts from ACTN abstraction method =20
            >     =
https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
            >     - Added Appendices A & B to discuss example deployment =
scenarios such as=20
            >     example of MDSC and PNC functions integrated in =
Service/Network=20
            >     Orchestrator (Appendix A) and example of IP + Optical =
network with L3VPN=20
            >     service (Appendix B)
            >
            >     In regard to ACTN abstraction method draft, we are =
going to keep it as a=20
            >     separate draft and use this document to elaborate =
other aspects not=20
            >     imported to the framework document.
            >
            >     The following diff pointer will help you see the =
changes with this revision:
            >    =20
            > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
            >
            >     The co-authors believe that the document is ready for =
WG LC. Any=20
            >     changes/comments will be appreciated.
            >
            >     Thanks & Best regards,
            >     Young & Daniele (on behalf of other =
co-authors/contributors)
            >
            >     -----Original Message-----
            >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
internet-drafts@ietf.org
            >     Sent: Friday, May 05, 2017 10:41 AM
            >     To: i-d-announce@ietf.org
            >     Cc: teas@ietf.org
            >     Subject: [Teas] I-D Action: =
draft-ietf-teas-actn-framework-05.txt
            >
            >
            >     A New Internet-Draft is available from the on-line =
Internet-Drafts directories.
            >     This draft is a work item of the Traffic Engineering =
Architecture and=20
            >     Signaling of the IETF.
            >
            >             Title           : Framework for Abstraction =
and Control of Traffic=20
            >             Engineered Networks
            >             Authors         : Daniele Ceccarelli
            >                               Young Lee
            >     	Filename        : =
draft-ietf-teas-actn-framework-05.txt
            >     	Pages           : 41
            >     	Date            : 2017-05-05
            >
            >     Abstract:
            >        Traffic Engineered networks have a variety of =
mechanisms to
            >        facilitate the separation of the data plane and =
control plane. They
            >        also have a range of management and provisioning =
protocols to
            >        configure and activate network resources.  These =
mechanisms
            >        represent key technologies for enabling flexible =
and dynamic
            >        networking.
            >
            >        Abstraction of network resources is a technique =
that can be applied
            >        to a single network domain or across multiple =
domains to create a
            >        single virtualized network that is under the =
control of a network
            >        operator or the customer of the operator that =
actually owns
            >        the network resources.
            >
            >        This document provides a framework for Abstraction =
and Control of
            >        Traffic Engineered Networks (ACTN).
            >
            >
            >
            >     The IETF datatracker status page for this draft is:
            >     =
https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
            >
            >     There are also htmlized versions available at:
            >     =
https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
            >    =20
            > =
https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
            > 5
            >
            >     A diff from the previous version is available at:
            >    =20
            > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
            >
            >
            >     Please note that it may take a couple of minutes from =
the time of=20
            >     submission until the htmlized version and diff are =
available at tools.ietf.org.
            >
            >     Internet-Drafts are also available by anonymous FTP =
at:
            >     ftp://ftp.ietf.org/internet-drafts/
            >
            >     _______________________________________________
            >     Teas mailing list
            >     Teas@ietf.org
            >     https://www.ietf.org/mailman/listinfo/teas
            >
            >     _______________________________________________
            >     Teas mailing list
            >     Teas@ietf.org
            >     https://www.ietf.org/mailman/listinfo/teas
            >
            >
            > _______________________________________________
            > Teas mailing list
            > Teas@ietf.org
            > https://www.ietf.org/mailman/listinfo/teas
            >
            > _______________________________________________
            > Teas mailing list
            > Teas@ietf.org
            > https://www.ietf.org/mailman/listinfo/teas
            >
            > _______________________________________________
            > Teas mailing list
            > Teas@ietf.org
            > https://www.ietf.org/mailman/listinfo/teas
            >
           =20
           =20
            _______________________________________________
            Teas mailing list
            Teas@ietf.org
            https://www.ietf.org/mailman/listinfo/teas
           =20
            _______________________________________________
            Teas mailing list
            Teas@ietf.org
            https://www.ietf.org/mailman/listinfo/teas
           =20
            _______________________________________________
            Netslices mailing list
            Netslices@ietf.org
            https://www.ietf.org/mailman/listinfo/netslices
            _______________________________________________
            Teas mailing list
            Teas@ietf.org
            https://www.ietf.org/mailman/listinfo/teas
           =20
       =20
       =20
        _______________________________________________
        Netslices mailing list
        Netslices@ietf.org
        https://www.ietf.org/mailman/listinfo/netslices
       =20
        _______________________________________________
        Teas mailing list
        Teas@ietf.org
        https://www.ietf.org/mailman/listinfo/teas
       =20
   =20
    _______________________________________________
    Teas mailing list
    Teas@ietf.org
    https://www.ietf.org/mailman/listinfo/teas
   =20

_______________________________________________
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Netslices@ietf.org
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From: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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On 30/05/17 12:44, sebastian wrote:
> Hello, Gert,
>
> Good points.
>
> There are various instantiations of a 'network slice' that are likely, based on a diverse array of usage scenarios.
> These diverse instantiations of a 'network slice', with a corresponding allocation of the required logical or physical resources, should be allowed to suit different usage scenarios that may range from a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
>
> Hence a generalized definition for the instantiation of a 'network slice' such as the one referred to below (3GPP) is reasonable:
>      "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."

That is excellent. And too broad. That can be anything from connection 
between two computers and a whole provider network. They both fit this 
rather elastic definition.

So, in order for this to be discussed at IETF at all we should limit the 
scope a little bit to one or more subject areas worked on at IETF:

1. Layer 3 and higher protocols.
2. Models describing network abstractions
3. Interoperability with other IETF efforts.

Otherwise, both the definition and the discussion should stay at 3GPP. 
They are good at discussing schemes of world domination, though from a 
point of view of network technology the results are quite often fit for 
Mr Bean, instead of Mr Blofeld (as intended).

A.

>
> Many thanks.
> -Sebastian
>
> -----Original Message-----
> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert Grammel
> Sent: Tuesday, May 30, 2017 6:17 AM
> To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; teas@ietf.org
> Cc: NetSlices@ietf.org
> Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>
> Hi Daniele,
>
> See below for more details:
>
> On 2017-05-30, 10:17, "Daniele Ceccarelli" <daniele.ceccarelli@ericsson.com> wrote:
>
>      Ciao Gert,
>      
>      Please see in line
>      Cheers
>      Daniele
>      
>      
>      -----Original Message-----
>      From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>      Sent: lunedì 29 maggio 2017 15:34
>      To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>      Cc: NetSlices@ietf.org
>      Subject: Re: [Teas] [Netslices] terminology discussion network slicing
>      
>      Daniele,
>      
>      Trying to summarize what you're saying: a Network slice is an overlay network with minimum service guarantees, including virtual network functions available in this overlay network.
>      [>DC] why do you speak about an overlay network? If for example you have a site connected with a lambda to a data center and there you have a number of VNF, that's IMO a slice but there is no overlay. I'd say that there could be an overlay but that's not mandatory.
> GGR> A Lambda travels through a WDM which is a Multiplexer (see discussion below). So a lambda is in my view an overlay, the multiplexed signal (OMS) being the underlay.
>
>
>
>      In your text I have issues with "dedicated to a given customer". Whether such construct is dedicated to one or shared among several legal customers shouldn't be of concern for the definition of a Network Slice.
>      [>DC] Correct, it should be possible to have it dedicated or shared. We just need to make sure that both options are supported.
> GGR>> So if it can either be dedicated or shared, why mentioning this at all? Is there anything else?
>
>      On similar terms, whether a resource (being a NF or transport capacity) is shared or not is a design choice rather than a definition. In particular, Multiplexer by definition share some sort of common capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the nature of multiplexing technique shouldn't be a definition criteria for a Network Slice either.
>      
>      Another food for thought:
>      - I would also add that a network slice may use it's own internal addressing scheme isolated from other slices. While this is optional, I would expect it to be used quite often.
>      [>DC] agree. Ala VPN.
>
>      - Why is it necessary to dedicate resources to a "Network Slice" at all? If e.g. a firewall NFV is in the DC and communicates over the Internet with a CPE (both belonging to a single owner) it would not fulfil the criteria of dedicated resource (Internet after all isn't dedicated), but it still looks pretty much like a "network slice".
>
>      [>DC] Think of remote surgery...wouldn't you want every single part of the end to end network from the doctor's hands to the scalpel being totally dedicated? :) ...and in that case I don't think the packets would go through the internet
> GGR>> There are a few issues here:
> 1)	this example looks a bit out-dated to me. There is only a one-to-one relationship between doctor and patient. This is what I would call a classical client-server model with protected resources. Ask for SONET leased line circuits if this is what a "slice" would mean. In defining what constitutes a slice you would also have to think about what constitutes a "doctor-slice" and what would be a "patient-slice"? (assuming responsible health care to avoid sarcastic interpretation)
> 2)	The question asked in my earlier email is whether the packets *must* go through a dedicated resource to call the thing "slice". In other words, if a thing that uses a non-dedicated "underlay" resource like the Internet can be called "slice" too? It is puzzling to me why the definition of "slice" would need any dedicated resource at all. It is in the end an implementers choice how much dedicated equipment is needed to provide a service. So why a slice has to use "dedicated resources", and what kind of "dedication" is meant? (See our earlier discussion about WDM)? Take your mobile as an example. It supports telephony and email. Those are different apps, potentially running in different VMs.
> a.	Is your phone a shared device or a dedicated one?
> b.	does using different apps means to use a different slices?
> c.	If you write emails to different recipients, would that qualify your email to be "dedicated", hence a different slice, just because they are in different address books?
> d.	If you switch from 3G to VoIP, does it mean to switch the slice, even if it is the same app?
>
> GGR> My thinking is that the definition of "slice" needs to make practical sense. The 3GPP definition is probably a bit too high level but makes sense to me:
>      "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>
>      Gert
>      
>      On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" <teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> wrote:
>      
>          Hi Sebastian, Jeff, Igor, all,
>          
>          I understand Jeff and Igor agree on the fact that a network slice does not necessarily include resources in the radio segment/domain and in the packet core one.
>          An example could be an enterprise with dedicated resources in the "transport" segment (e.g. VPN, VN and TE-tunnels) that connect the customer premises to a data center where a number of VNF (e.g. firewall, nat, dpi) is dedicated to that given customer.
>          My personal opinion is that this should be considered a network slice.
>          
>          The definition of network slice should allow for this scenario and mostly should clearly state whether this is included or not.
>          
>          Sebastian, I don't understand if your statement:
>          " The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains."
>          implies that there must be a radio and a core segment in order to have a slice.
>          
>          BR
>          Daniele
>          
>          
>          -----Original Message-----
>          From: sebastian [mailto:comscape@gmail.com]
>          Sent: domenica 28 maggio 2017 07:12
>          To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>          Cc: NetSlices@ietf.org
>          Subject: RE: [Netslices] [Teas] terminology discussion network slicing
>          
>          Hello, Jeff,
>          
>          Agree with your view that the scope (core and/or radio layer) of a 'network slice' could vary depending on the triggers for instantiating the 'network slice'.
>          
>          On the other hand the instantiation of a 'network slice' may also be e2e (end-to-end), such as in device roaming scenarios, or in the case of vertical services that span different service providers.
>          
>          The span of a 'network slice' is only limited by the availability of resources and appropriate policies (e.g. SLAs), independent of whether those resources are in the core network layer or in the radio network layer.
>          
>          The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains.
>          
>          Many thanks.
>          -Sebastian
>          
>          
>          -----Original Message-----
>          From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor Bryskin
>          Sent: Wednesday, May 24, 2017 7:56 AM
>          To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org
>          Cc: NetSlices@ietf.org
>          Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>          
>          Thanks Jeff,
>          
>          I am glad we are in sync.
>          
>          Igor
>          
>          -----Original Message-----
>          From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
>          Sent: Wednesday, May 24, 2017 8:45 AM
>          To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>          Cc: NetSlices@ietf.org
>          Subject: Re: [Teas] terminology discussion network slicing
>          
>          +1 Igor
>          
>          From transport side (L0-L3) we need to expose set of API’s that would allow to request a set of resources (a slice) either virtualized of physical that meet the constrains as requested by the business logic. Radio, while would definitely be one of most important use cases, would not be exclusively for radio use only. Any network management/ orchestration layer ideally should be able to use same set of API’s to request an e2e service.
>          
>          Cheers,
>          Jeff
>           
>          
>          On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" <teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
>          
>              Hi Cristina,
>              
>              I didn’t say that ns has nothing to do with radio. I said that ns *may* have nothing to do with radio, i.e. may support/enable network architectures that do not involve radio necessarily.
>              
>              Igor
>              
>              -----Original Message-----
>              From: qiangli (D)
>              Sent: Wednesday, May 24, 2017 5:05 AM
>              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>              Cc: NetSlices@ietf.org
>              Subject: 答复: [Teas] terminology discussion network slicing
>              
>              Hi Igor,
>              
>              I share the same opinion on 5G and network slicing, but can't see the relation between this opinion and your conclusion that ns has nothing to do with radio.
>              
>              Best regards,
>              
>              Cristina QIANG
>              
>              
>              -----邮件原件-----
>              发件人: Igor Bryskin
>              发送时间: 2017年5月20日 23:50
>              收件人: qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>              抄送: NetSlices@ietf.org
>              主题: RE: [Teas] terminology discussion network slicing
>              
>              Hi Cristina,
>              
>              People whose opinion I respect very much told me that even the 3GPP network slicing definition and effort is not 5G specific.  Network slicing is viewed as an important capability of 5G, but it could serve other architectures.
>              
>              Cheers,
>              Igor
>              
>              -----Original Message-----
>              From: qiangli (D)
>              Sent: Saturday, May 20, 2017 5:27 AM
>              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>              Cc: NetSlices@ietf.org
>              Subject: 答复: [Teas] terminology discussion network slicing
>              
>              Hi Igor,
>              
>              I have different opinion on " Network slicing may have nothing to do with radio".
>              IMO, network slicing should be a resource-oriented management mode. The end-to-end network slice (from UE to server/other UE) of course involves the radio resource, usually we use the word "RAN-radio access network" rather than simply say "radio". The Frequency band, time, code, equipment/site, and software are a number of dimensions, in which RAN resources can be isolated [Online available http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-service-guaranteed-network-slicing-whitepaper].
>              
>              Best regards,
>              
>              Qiang, Li (Cristina)
>              NetLab, Huawei
>              
>              
>              -----邮件原件-----
>              发件人: Netslices [mailto:netslices-bounces@ietf.org] 代表 Igor Bryskin
>              发送时间: 2017年5月20日 6:12
>              收件人: Daniele Ceccarelli; Leeyoung; teas@ietf.org
>              抄送: NetSlices@ietf.org
>              主题: Re: [Netslices] [Teas] terminology discussion network slicing
>              
>              Hi Danielle,
>              
>              Network slicing may have nothing to do with radio. 5g is just a big reason as to why the interest/focus is back on network slicing, which is a very old concept. I don't think that anyone is arguing with what you wrote. The questions are:
>              a) how do you manage these "pieces"?
>              b) what policy infrastructure should be put in place?
>              c) how do you ensure their separation or, conversely, the degree of resource sharing?
>              d) why exactly legacy VPNs are not good enough?
>              
>              Cheers,
>              Igor
>              
>              
>                
>              
>              -----Original Message-----
>              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
>              Sent: Friday, May 19, 2017 4:19 PM
>              To: Leeyoung; teas@ietf.org
>              Cc: NetSlices@ietf.org
>              Subject: Re: [Teas] terminology discussion network slicing
>              
>              Hi Young, all,
>              
>              i agree with your conclusion but would like to clarify one thing that IMO got lost in the discussion since its beginning.
>              
>              The 3GPP definition says:
>              "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>              
>              This means that a network slice IS NOT a VPN or a TE Tunnel.
>              A network slice is "something" (netslices and 3GPP will define what this something is) that is composed by a "piece" in the RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other pieces in possible other domains.
>              
>              The word "transport" can be misleading here since one could think of transport technologies (e.g. WDM, OTN), but what I'm referring to as TRANSPORT DOMAIN is that part of the network that is used to carry a packet between two other domains.
>              In order to have a slice, that portion of the transport domain needs to be engineered, hence it is all about building a TE entity and stitching services to such entity. This is what is in the ACTN scope.
>              
>              My very personal opinion is that whatever belongs to the transport domain belongs to IETF (and is already being addressed), while the rest is a dangerous duplication of concepts standardized is other SDOs...but this is another discussion that doesn't fit here.
>              
>              BR
>              Daniele
>              
>              
>              -----Original Message-----
>              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
>              Sent: venerdì 19 maggio 2017 15:15
>              To: teas@ietf.org
>              Cc: NetSlices@ietf.org
>              Subject: Re: [Teas] terminology discussion network slicing
>              
>              Hi,
>              
>              Lou is right. There is a dedicated email list for the discussion of "network slicing (cc'ed)" and the discussion about what that term means should be held on that list.
>              
>              We have used similar language in draft-ietf-teas-actn-framework right from the
>              00 version. Recent changes have been an attempt to clarify what the terminology means in the context of ACTN. We are not trying to define or redefine "network slicing" in the ACTN document, but are trying to make it clear how ACTN works.
>              
>              Therefore I propose the following resolution:
>              
>              1. All discussion of the general applicability and definition of "network slicing" is held on the netslices mailing list.
>              
>              2. We adopt Adrian's suggestion to explain that the scope of the definition of the terms used in the ACTN framework is limited to ACTN. That means effectively that if there are components of a wider definition of network slicing that are not supported by ACTN, that will be OK.
>              
>              I propose to post an updated version in the next few days and I believe that will allow this draft to move ahead without being blocked by the discussion in netslices. Once the IETF has a stable definition of network slicing we can return and see how ACTN is applicable to that definition an whether more wok is need (in a separate draft).
>              
>              Thanks,
>              Young
>              
>              -----Original Message-----
>              From: Lou Berger [mailto:lberger@labn.net]
>              Sent: Tuesday, May 16, 2017 8:35 AM
>              To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>              Subject: Re: [Teas] terminology discussion network slicing
>              
>              Perhaps it's time to bring the discussion to the slicing list and report back their reaponse....
>              
>              Lou
>              
>              
>              On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:
>              
>              > Hi Sergio,
>              >
>              > I would also like to hear more from network slicing experts.
>              >
>              > My understanding is that the difference in the separation (in terms of
>              > control and data planes, security, etc.). For example, traditional BGP
>              > based L3 VPNs (that use provider's common control plane for their
>              > management and IP/MPLS TE tunnels to inter-connect their PEs) will
>              > probably not be able guarantee for the clients msec range connectivity
>              > setup times required by 5g, while provided by the same provider fully
>              > separated/genuinely private IP/MPLS networks (that do not share
>              > IP/MPLS control plane and infrastructure, whose network topology is
>              > supported by separate L0/L1 connections) hopefully will be able to
>              > provide such guarantees. Therefore, I define layer network slices as
>              > dynamically managed fully isolated in control and data planes private
>              > TE layer networks, which may share one or more underlying server layer networks.
>              >
>              >
>              > Cheers,
>              > Igor
>              >
>              >
>              >
>              >
>              > -----Original Message-----
>              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio
>              > (Nokia - IT/Vimercate)
>              > Sent: Tuesday, May 16, 2017 6:08 AM
>              > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
>              > Subject: Re: [Teas] terminology discussion network slicing
>              >
>              > Hi Gert,
>              >
>              > "Thinking a bit about it I came to the point where "VPN" and "network
>              > slices" seem to describe the same entity or at least a "network slice"
>              > being a VPN of VPNs?"
>              >
>              > I share completely your conclusion , I'd like if someone can explain
>              > if a difference really exists .
>              >
>              > Thanks
>              > Sergio
>              >
>              >
>              > -----Original Message-----
>              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>              > Sent: Monday, May 15, 2017 7:02 PM
>              > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>              > Subject: Re: [Teas] terminology discussion network slicing
>              >
>              > Leeyoung,
>              >
>              > Thank you for taking a stab on this. Usually when getting to a
>              > definition, I try to establish what kind of existing constructs would
>              > fall under the definition. If my understanding is correct, the
>              > following list of constructs would all satisfy the definition somehow.
>              > - A TDM network with a p2p TDM connection
>              > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
>              > - An MPLS LSP using a traffic engineered IP network
>              > - A L2VPN using a traffic engineered MPLS network
>              > - A L3VPN using a traffic engineered IP network
>              > - A TCP connection using a traffic engineered IP network
>              > - Different QoS classes in an IP network
>              >
>              > Thinking a bit about it I came to the point where "VPN" and "network
>              > slices" seem to describe the same entity or at least a "network slice"
>              > being a VPN of VPNs?
>              >
>              > Gert
>              >
>              >
>              > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
>              > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>              >
>              >     Hi Adrian and others,
>              >
>              >     We'd like cross check with you on some terminology we introduced newly. Any
>              >     comment on these terms will be greatly appreciated.
>              >
>              >     We introduced 'network slicing' as follows:
>              >
>              >             Network slicing is a collection of resources
>              >             that are used to establish logically dedicated virtual networks
>              >             over TE networks. It allows a network provider to provide
>              >             dedicated virtual networks for application/customer over a
>              >             common network infrastructure. The logically dedicated
>              >             resources are a part of the larger common network
>              >             infrastructures that are shared among various network slice
>              >             instances which are the end-to-end realization of network
>              >             slicing, consisting of the combination of physically or
>              >             logically dedicated resources.
>              >
>              >
>              >     Thanks.
>              >     Young and Daniele
>              >     -----Original Message-----
>              >     From: Leeyoung
>              >     Sent: Friday, May 05, 2017 1:41 PM
>              >     To: teas@ietf.org
>              >     Subject: RE: [Teas] I-D Action:
>              > draft-ietf-teas-actn-framework-05.txt
>              >
>              >     Hi,
>              >
>              >     This update is intended to incorporate the comments from the last WG
>              >     meeting and any pending issues. We also have taken the global editorial
>              >     changes to make it consistent through the document. Major changes are:
>              >
>              >     - Inclusion of "network slicing" definition from ACTN perspective (in the
>              >     terminology section)
>              >     - Added virtual network service (VNS) section (Section 3) to define types
>              >     of VNS.
>              >     - Incorporated "orchestration" (service/network) mapping to ACTN
>              >     architecture (See Section 5.2)
>              >     - Created a new section 6 (Topology Abstraction Method) where we imported
>              >     some texts from ACTN abstraction method
>              >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>              >     - Added Appendices A & B to discuss example deployment scenarios such as
>              >     example of MDSC and PNC functions integrated in Service/Network
>              >     Orchestrator (Appendix A) and example of IP + Optical network with L3VPN
>              >     service (Appendix B)
>              >
>              >     In regard to ACTN abstraction method draft, we are going to keep it as a
>              >     separate draft and use this document to elaborate other aspects not
>              >     imported to the framework document.
>              >
>              >     The following diff pointer will help you see the changes with this revision:
>              >
>              > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>              >
>              >     The co-authors believe that the document is ready for WG LC. Any
>              >     changes/comments will be appreciated.
>              >
>              >     Thanks & Best regards,
>              >     Young & Daniele (on behalf of other co-authors/contributors)
>              >
>              >     -----Original Message-----
>              >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-drafts@ietf.org
>              >     Sent: Friday, May 05, 2017 10:41 AM
>              >     To: i-d-announce@ietf.org
>              >     Cc: teas@ietf.org
>              >     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>              >
>              >
>              >     A New Internet-Draft is available from the on-line Internet-Drafts directories.
>              >     This draft is a work item of the Traffic Engineering Architecture and
>              >     Signaling of the IETF.
>              >
>              >             Title           : Framework for Abstraction and Control of Traffic
>              >             Engineered Networks
>              >             Authors         : Daniele Ceccarelli
>              >                               Young Lee
>              >     	Filename        : draft-ietf-teas-actn-framework-05.txt
>              >     	Pages           : 41
>              >     	Date            : 2017-05-05
>              >
>              >     Abstract:
>              >        Traffic Engineered networks have a variety of mechanisms to
>              >        facilitate the separation of the data plane and control plane. They
>              >        also have a range of management and provisioning protocols to
>              >        configure and activate network resources.  These mechanisms
>              >        represent key technologies for enabling flexible and dynamic
>              >        networking.
>              >
>              >        Abstraction of network resources is a technique that can be applied
>              >        to a single network domain or across multiple domains to create a
>              >        single virtualized network that is under the control of a network
>              >        operator or the customer of the operator that actually owns
>              >        the network resources.
>              >
>              >        This document provides a framework for Abstraction and Control of
>              >        Traffic Engineered Networks (ACTN).
>              >
>              >
>              >
>              >     The IETF datatracker status page for this draft is:
>              >     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>              >
>              >     There are also htmlized versions available at:
>              >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>              >
>              > https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
>              > 5
>              >
>              >     A diff from the previous version is available at:
>              >
>              > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>              >
>              >
>              >     Please note that it may take a couple of minutes from the time of
>              >     submission until the htmlized version and diff are available at tools.ietf.org.
>              >
>              >     Internet-Drafts are also available by anonymous FTP at:
>              >     ftp://ftp.ietf.org/internet-drafts/
>              >
>              >     _______________________________________________
>              >     Teas mailing list
>              >     Teas@ietf.org
>              >     https://www.ietf.org/mailman/listinfo/teas
>              >
>              >     _______________________________________________
>              >     Teas mailing list
>              >     Teas@ietf.org
>              >     https://www.ietf.org/mailman/listinfo/teas
>              >
>              >
>              > _______________________________________________
>              > Teas mailing list
>              > Teas@ietf.org
>              > https://www.ietf.org/mailman/listinfo/teas
>              >
>              > _______________________________________________
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>              > Teas@ietf.org
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>              > _______________________________________________
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>              
>              
>              _______________________________________________
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Reply-To: <sebastian.thalanany@ieee.org>
From: "sebastian" <comscape@gmail.com>
To: "'Anton Ivanov'" <anton.ivanov@kot-begemot.co.uk>, <netslices@ietf.org>
References: <7AEB3D6833318045B4AE71C2C87E8E172B2CA60E@SJCEML702-CHM.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD0078639099515B3@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB49B9@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD007863909953AFA@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB520C@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD0078639099662D6@SJCEML702-CHM.china.huawei.com> <4B13E4DA-DB18-4454-AFC4-57A8B1264CE1@gmail.com> <0C72C38E7EBC34499E8A9E7DD00786390996673B@SJCEML702-CHM.china.huawei.com> <001501d2d7 70$f1a16180$d4e42480$@gmail.com> <AM2PR07MB09948AF604E3C7869296AEDCF0F30@AM2PR07MB0994.eurprd07.prod.outlook.com> <7625E93C-8E51-4B2F-B28C-FB2A5287FD99@juniper.net> <VI1PR07MB1005262C6FC0CC75EF9D3AA1F0F00@VI1PR07MB1005.eurprd07.prod.outlook.com> <AB42001E-4A0E-4019-A373-D46BAB1ECB78@juniper.net> <001f01d2d93a$0ab65de0$202319a0$@gmail.com> <aadfe32c-b079-8427-a738-dc5ef9e45703@kot-begemot.co.uk>
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Hello, Anton,

The 5G ecosystem contains pragmatic usage scenarios (mobile, fixed, =
verticals etc.) that require flexible orchestration methods that would =
enable various choices with respect to the span of an instantiated =
'network slice'

This would imply both 'segmented' and 'e2e' instantiations of a 'network =
slice' based on a given usage scenario.
Signaling, orchestration, and interoperability, with respect to the =
required protocols and procedures would be relevant.

Many thanks.
-Sebastian

-----Original Message-----
From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Anton =
Ivanov
Sent: Tuesday, May 30, 2017 7:39 AM
To: netslices@ietf.org
Subject: Re: [Netslices] [Teas] terminology discussion network slicing



On 30/05/17 12:44, sebastian wrote:
> Hello, Gert,
>
> Good points.
>
> There are various instantiations of a 'network slice' that are likely, =
based on a diverse array of usage scenarios.
> These diverse instantiations of a 'network slice', with a =
corresponding allocation of the required logical or physical resources, =
should be allowed to suit different usage scenarios that may range from =
a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
>
> Hence a generalized definition for the instantiation of a 'network =
slice' such as the one referred to below (3GPP) is reasonable:
>      "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."

That is excellent. And too broad. That can be anything from connection =
between two computers and a whole provider network. They both fit this =
rather elastic definition.

So, in order for this to be discussed at IETF at all we should limit the =
scope a little bit to one or more subject areas worked on at IETF:

1. Layer 3 and higher protocols.
2. Models describing network abstractions 3. Interoperability with other =
IETF efforts.

Otherwise, both the definition and the discussion should stay at 3GPP.=20
They are good at discussing schemes of world domination, though from a =
point of view of network technology the results are quite often fit for =
Mr Bean, instead of Mr Blofeld (as intended).

A.

>
> Many thanks.
> -Sebastian
>
> -----Original Message-----
> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert=20
> Grammel
> Sent: Tuesday, May 30, 2017 6:17 AM
> To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>;=20
> teas@ietf.org
> Cc: NetSlices@ietf.org
> Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>
> Hi Daniele,
>
> See below for more details:
>
> On 2017-05-30, 10:17, "Daniele Ceccarelli" =
<daniele.ceccarelli@ericsson.com> wrote:
>
>      Ciao Gert,
>     =20
>      Please see in line
>      Cheers
>      Daniele
>     =20
>     =20
>      -----Original Message-----
>      From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert =
Grammel
>      Sent: luned=C3=AC 29 maggio 2017 15:34
>      To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; =
sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; =
'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' =
<qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>      Cc: NetSlices@ietf.org
>      Subject: Re: [Teas] [Netslices] terminology discussion network=20
> slicing
>     =20
>      Daniele,
>     =20
>      Trying to summarize what you're saying: a Network slice is an =
overlay network with minimum service guarantees, including virtual =
network functions available in this overlay network.
>      [>DC] why do you speak about an overlay network? If for example =
you have a site connected with a lambda to a data center and there you =
have a number of VNF, that's IMO a slice but there is no overlay. I'd =
say that there could be an overlay but that's not mandatory.
> GGR> A Lambda travels through a WDM which is a Multiplexer (see =
discussion below). So a lambda is in my view an overlay, the multiplexed =
signal (OMS) being the underlay.
>
>
>
>      In your text I have issues with "dedicated to a given customer". =
Whether such construct is dedicated to one or shared among several legal =
customers shouldn't be of concern for the definition of a Network Slice.
>      [>DC] Correct, it should be possible to have it dedicated or =
shared. We just need to make sure that both options are supported.
> GGR>> So if it can either be dedicated or shared, why mentioning this =
at all? Is there anything else?
>
>      On similar terms, whether a resource (being a NF or transport =
capacity) is shared or not is a design choice rather than a definition. =
In particular, Multiplexer by definition share some sort of common =
capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the =
nature of multiplexing technique shouldn't be a definition criteria for =
a Network Slice either.
>     =20
>      Another food for thought:
>      - I would also add that a network slice may use it's own internal =
addressing scheme isolated from other slices. While this is optional, I =
would expect it to be used quite often.
>      [>DC] agree. Ala VPN.
>
>      - Why is it necessary to dedicate resources to a "Network Slice" =
at all? If e.g. a firewall NFV is in the DC and communicates over the =
Internet with a CPE (both belonging to a single owner) it would not =
fulfil the criteria of dedicated resource (Internet after all isn't =
dedicated), but it still looks pretty much like a "network slice".
>
>      [>DC] Think of remote surgery...wouldn't you want every single=20
> part of the end to end network from the doctor's hands to the scalpel=20
> being totally dedicated? :) ...and in that case I don't think the=20
> packets would go through the internet
> GGR>> There are a few issues here:
> 1)	this example looks a bit out-dated to me. There is only a =
one-to-one relationship between doctor and patient. This is what I would =
call a classical client-server model with protected resources. Ask for =
SONET leased line circuits if this is what a "slice" would mean. In =
defining what constitutes a slice you would also have to think about =
what constitutes a "doctor-slice" and what would be a "patient-slice"? =
(assuming responsible health care to avoid sarcastic interpretation)
> 2)	The question asked in my earlier email is whether the packets =
*must* go through a dedicated resource to call the thing "slice". In =
other words, if a thing that uses a non-dedicated "underlay" resource =
like the Internet can be called "slice" too? It is puzzling to me why =
the definition of "slice" would need any dedicated resource at all. It =
is in the end an implementers choice how much dedicated equipment is =
needed to provide a service. So why a slice has to use "dedicated =
resources", and what kind of "dedication" is meant? (See our earlier =
discussion about WDM)? Take your mobile as an example. It supports =
telephony and email. Those are different apps, potentially running in =
different VMs.
> a.	Is your phone a shared device or a dedicated one?
> b.	does using different apps means to use a different slices?
> c.	If you write emails to different recipients, would that qualify =
your email to be "dedicated", hence a different slice, just because they =
are in different address books?
> d.	If you switch from 3G to VoIP, does it mean to switch the slice, =
even if it is the same app?
>
> GGR> My thinking is that the definition of "slice" needs to make =
practical sense. The 3GPP definition is probably a bit too high level =
but makes sense to me:
>      "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."
>
>      Gert
>     =20
>      On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" =
<teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> =
wrote:
>     =20
>          Hi Sebastian, Jeff, Igor, all,
>         =20
>          I understand Jeff and Igor agree on the fact that a network =
slice does not necessarily include resources in the radio segment/domain =
and in the packet core one.
>          An example could be an enterprise with dedicated resources in =
the "transport" segment (e.g. VPN, VN and TE-tunnels) that connect the =
customer premises to a data center where a number of VNF (e.g. firewall, =
nat, dpi) is dedicated to that given customer.
>          My personal opinion is that this should be considered a =
network slice.
>         =20
>          The definition of network slice should allow for this =
scenario and mostly should clearly state whether this is included or =
not.
>         =20
>          Sebastian, I don't understand if your statement:
>          " The management and orchestration of resources should be =
capable of instantiating a 'network slice' with an e2e (end-to-end) =
scope, where the scope could be between two devices, connected across =
intervening radio networks and core networks that may belong to the same =
or different administrative domains."
>          implies that there must be a radio and a core segment in =
order to have a slice.
>         =20
>          BR
>          Daniele
>         =20
>         =20
>          -----Original Message-----
>          From: sebastian [mailto:comscape@gmail.com]
>          Sent: domenica 28 maggio 2017 07:12
>          To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' =
<jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele =
Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' =
<leeyoung@huawei.com>; teas@ietf.org
>          Cc: NetSlices@ietf.org
>          Subject: RE: [Netslices] [Teas] terminology discussion=20
> network slicing
>         =20
>          Hello, Jeff,
>         =20
>          Agree with your view that the scope (core and/or radio layer) =
of a 'network slice' could vary depending on the triggers for =
instantiating the 'network slice'.
>         =20
>          On the other hand the instantiation of a 'network slice' may =
also be e2e (end-to-end), such as in device roaming scenarios, or in the =
case of vertical services that span different service providers.
>         =20
>          The span of a 'network slice' is only limited by the =
availability of resources and appropriate policies (e.g. SLAs), =
independent of whether those resources are in the core network layer or =
in the radio network layer.
>         =20
>          The management and orchestration of resources should be =
capable of instantiating a 'network slice' with an e2e (end-to-end) =
scope, where the scope could be between two devices, connected across =
intervening radio networks and core networks that may belong to the same =
or different administrative domains.
>         =20
>          Many thanks.
>          -Sebastian
>         =20
>         =20
>          -----Original Message-----
>          From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf =
Of Igor Bryskin
>          Sent: Wednesday, May 24, 2017 7:56 AM
>          To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) =
<qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org
>          Cc: NetSlices@ietf.org
>          Subject: Re: [Netslices] [Teas] terminology discussion=20
> network slicing
>         =20
>          Thanks Jeff,
>         =20
>          I am glad we are in sync.
>         =20
>          Igor
>         =20
>          -----Original Message-----
>          From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
>          Sent: Wednesday, May 24, 2017 8:45 AM
>          To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>          Cc: NetSlices@ietf.org
>          Subject: Re: [Teas] terminology discussion network slicing
>         =20
>          +1 Igor
>         =20
>          From transport side (L0-L3) we need to expose set of =
API=E2=80=99s that would allow to request a set of resources (a slice) =
either virtualized of physical that meet the constrains as requested by =
the business logic. Radio, while would definitely be one of most =
important use cases, would not be exclusively for radio use only. Any =
network management/ orchestration layer ideally should be able to use =
same set of API=E2=80=99s to request an e2e service.
>         =20
>          Cheers,
>          Jeff
>          =20
>         =20
>          On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" =
<teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
>         =20
>              Hi Cristina,
>             =20
>              I didn=E2=80=99t say that ns has nothing to do with =
radio. I said that ns *may* have nothing to do with radio, i.e. may =
support/enable network architectures that do not involve radio =
necessarily.
>             =20
>              Igor
>             =20
>              -----Original Message-----
>              From: qiangli (D)
>              Sent: Wednesday, May 24, 2017 5:05 AM
>              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>              Cc: NetSlices@ietf.org
>              Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology =
discussion network=20
> slicing
>             =20
>              Hi Igor,
>             =20
>              I share the same opinion on 5G and network slicing, but =
can't see the relation between this opinion and your conclusion that ns =
has nothing to do with radio.
>             =20
>              Best regards,
>             =20
>              Cristina QIANG
>             =20
>             =20
>              -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
>              =E5=8F=91=E4=BB=B6=E4=BA=BA: Igor Bryskin
>              =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 23:50
>              =E6=94=B6=E4=BB=B6=E4=BA=BA: qiangli (D); Daniele =
Ceccarelli; Leeyoung; teas@ietf.org
>              =E6=8A=84=E9=80=81: NetSlices@ietf.org
>              =E4=B8=BB=E9=A2=98: RE: [Teas] terminology discussion =
network slicing
>             =20
>              Hi Cristina,
>             =20
>              People whose opinion I respect very much told me that =
even the 3GPP network slicing definition and effort is not 5G specific.  =
Network slicing is viewed as an important capability of 5G, but it could =
serve other architectures.
>             =20
>              Cheers,
>              Igor
>             =20
>              -----Original Message-----
>              From: qiangli (D)
>              Sent: Saturday, May 20, 2017 5:27 AM
>              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>              Cc: NetSlices@ietf.org
>              Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology =
discussion network=20
> slicing
>             =20
>              Hi Igor,
>             =20
>              I have different opinion on " Network slicing may have =
nothing to do with radio".
>              IMO, network slicing should be a resource-oriented =
management mode. The end-to-end network slice (from UE to server/other =
UE) of course involves the radio resource, usually we use the word =
"RAN-radio access network" rather than simply say "radio". The Frequency =
band, time, code, equipment/site, and software are a number of =
dimensions, in which RAN resources can be isolated [Online available =
http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-se=
rvice-guaranteed-network-slicing-whitepaper].
>             =20
>              Best regards,
>             =20
>              Qiang, Li (Cristina)
>              NetLab, Huawei
>             =20
>             =20
>              -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
>              =E5=8F=91=E4=BB=B6=E4=BA=BA: Netslices =
[mailto:netslices-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Igor Bryskin
>              =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 6:12
>              =E6=94=B6=E4=BB=B6=E4=BA=BA: Daniele Ceccarelli; =
Leeyoung; teas@ietf.org
>              =E6=8A=84=E9=80=81: NetSlices@ietf.org
>              =E4=B8=BB=E9=A2=98: Re: [Netslices] [Teas] terminology =
discussion network=20
> slicing
>             =20
>              Hi Danielle,
>             =20
>              Network slicing may have nothing to do with radio. 5g is =
just a big reason as to why the interest/focus is back on network =
slicing, which is a very old concept. I don't think that anyone is =
arguing with what you wrote. The questions are:
>              a) how do you manage these "pieces"?
>              b) what policy infrastructure should be put in place?
>              c) how do you ensure their separation or, conversely, the =
degree of resource sharing?
>              d) why exactly legacy VPNs are not good enough?
>             =20
>              Cheers,
>              Igor
>             =20
>             =20
>               =20
>             =20
>              -----Original Message-----
>              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Daniele Ceccarelli
>              Sent: Friday, May 19, 2017 4:19 PM
>              To: Leeyoung; teas@ietf.org
>              Cc: NetSlices@ietf.org
>              Subject: Re: [Teas] terminology discussion network=20
> slicing
>             =20
>              Hi Young, all,
>             =20
>              i agree with your conclusion but would like to clarify =
one thing that IMO got lost in the discussion since its beginning.
>             =20
>              The 3GPP definition says:
>              "A set of network functions and the resources for these =
network functions which are arranged and configured, forming a complete =
logical network to meet certain network characteristics."
>             =20
>              This means that a network slice IS NOT a VPN or a TE =
Tunnel.
>              A network slice is "something" (netslices and 3GPP will =
define what this something is) that is composed by a "piece" in the =
RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT =
domain, plus possible other pieces in possible other domains.
>             =20
>              The word "transport" can be misleading here since one =
could think of transport technologies (e.g. WDM, OTN), but what I'm =
referring to as TRANSPORT DOMAIN is that part of the network that is =
used to carry a packet between two other domains.
>              In order to have a slice, that portion of the transport =
domain needs to be engineered, hence it is all about building a TE =
entity and stitching services to such entity. This is what is in the =
ACTN scope.
>             =20
>              My very personal opinion is that whatever belongs to the =
transport domain belongs to IETF (and is already being addressed), while =
the rest is a dangerous duplication of concepts standardized is other =
SDOs...but this is another discussion that doesn't fit here.
>             =20
>              BR
>              Daniele
>             =20
>             =20
>              -----Original Message-----
>              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Leeyoung
>              Sent: venerd=C3=AC 19 maggio 2017 15:15
>              To: teas@ietf.org
>              Cc: NetSlices@ietf.org
>              Subject: Re: [Teas] terminology discussion network=20
> slicing
>             =20
>              Hi,
>             =20
>              Lou is right. There is a dedicated email list for the =
discussion of "network slicing (cc'ed)" and the discussion about what =
that term means should be held on that list.
>             =20
>              We have used similar language in =
draft-ietf-teas-actn-framework right from the
>              00 version. Recent changes have been an attempt to =
clarify what the terminology means in the context of ACTN. We are not =
trying to define or redefine "network slicing" in the ACTN document, but =
are trying to make it clear how ACTN works.
>             =20
>              Therefore I propose the following resolution:
>             =20
>              1. All discussion of the general applicability and =
definition of "network slicing" is held on the netslices mailing list.
>             =20
>              2. We adopt Adrian's suggestion to explain that the scope =
of the definition of the terms used in the ACTN framework is limited to =
ACTN. That means effectively that if there are components of a wider =
definition of network slicing that are not supported by ACTN, that will =
be OK.
>             =20
>              I propose to post an updated version in the next few days =
and I believe that will allow this draft to move ahead without being =
blocked by the discussion in netslices. Once the IETF has a stable =
definition of network slicing we can return and see how ACTN is =
applicable to that definition an whether more wok is need (in a separate =
draft).
>             =20
>              Thanks,
>              Young
>             =20
>              -----Original Message-----
>              From: Lou Berger [mailto:lberger@labn.net]
>              Sent: Tuesday, May 16, 2017 8:35 AM
>              To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, =
Sergio (Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel =
<ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
>              Subject: Re: [Teas] terminology discussion network=20
> slicing
>             =20
>              Perhaps it's time to bring the discussion to the slicing =
list and report back their reaponse....
>             =20
>              Lou
>             =20
>             =20
>              On May 16, 2017 8:31:19 AM Igor Bryskin =
<Igor.Bryskin@huawei.com> wrote:
>             =20
>              > Hi Sergio,
>              >
>              > I would also like to hear more from network slicing =
experts.
>              >
>              > My understanding is that the difference in the =
separation (in terms of
>              > control and data planes, security, etc.). For example, =
traditional BGP
>              > based L3 VPNs (that use provider's common control plane =
for their
>              > management and IP/MPLS TE tunnels to inter-connect =
their PEs) will
>              > probably not be able guarantee for the clients msec =
range connectivity
>              > setup times required by 5g, while provided by the same =
provider fully
>              > separated/genuinely private IP/MPLS networks (that do =
not share
>              > IP/MPLS control plane and infrastructure, whose network =
topology is
>              > supported by separate L0/L1 connections) hopefully will =
be able to
>              > provide such guarantees. Therefore, I define layer =
network slices as
>              > dynamically managed fully isolated in control and data =
planes private
>              > TE layer networks, which may share one or more =
underlying server layer networks.
>              >
>              >
>              > Cheers,
>              > Igor
>              >
>              >
>              >
>              >
>              > -----Original Message-----
>              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Belotti, Sergio
>              > (Nokia - IT/Vimercate)
>              > Sent: Tuesday, May 16, 2017 6:08 AM
>              > To: Gert Grammel; Leeyoung; teas@ietf.org; =
adrian@olddog.co.uk
>              > Subject: Re: [Teas] terminology discussion network =
slicing
>              >
>              > Hi Gert,
>              >
>              > "Thinking a bit about it I came to the point where =
"VPN" and "network
>              > slices" seem to describe the same entity or at least a =
"network slice"
>              > being a VPN of VPNs?"
>              >
>              > I share completely your conclusion , I'd like if =
someone can explain
>              > if a difference really exists .
>              >
>              > Thanks
>              > Sergio
>              >
>              >
>              > -----Original Message-----
>              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Gert Grammel
>              > Sent: Monday, May 15, 2017 7:02 PM
>              > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
>              > Subject: Re: [Teas] terminology discussion network =
slicing
>              >
>              > Leeyoung,
>              >
>              > Thank you for taking a stab on this. Usually when =
getting to a
>              > definition, I try to establish what kind of existing =
constructs would
>              > fall under the definition. If my understanding is =
correct, the
>              > following list of constructs would all satisfy the =
definition somehow.
>              > - A TDM network with a p2p TDM connection
>              > - A PSC capable network carrying a p2p circuit (such as =
EPL/EVPL)
>              > - An MPLS LSP using a traffic engineered IP network
>              > - A L2VPN using a traffic engineered MPLS network
>              > - A L3VPN using a traffic engineered IP network
>              > - A TCP connection using a traffic engineered IP =
network
>              > - Different QoS classes in an IP network
>              >
>              > Thinking a bit about it I came to the point where "VPN" =
and "network
>              > slices" seem to describe the same entity or at least a =
"network slice"
>              > being a VPN of VPNs?
>              >
>              > Gert
>              >
>              >
>              > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
>              > <teas-bounces@ietf.org on behalf of =
leeyoung@huawei.com> wrote:
>              >
>              >     Hi Adrian and others,
>              >
>              >     We'd like cross check with you on some terminology =
we introduced newly. Any
>              >     comment on these terms will be greatly appreciated.
>              >
>              >     We introduced 'network slicing' as follows:
>              >
>              >             Network slicing is a collection of =
resources
>              >             that are used to establish logically =
dedicated virtual networks
>              >             over TE networks. It allows a network =
provider to provide
>              >             dedicated virtual networks for =
application/customer over a
>              >             common network infrastructure. The =
logically dedicated
>              >             resources are a part of the larger common =
network
>              >             infrastructures that are shared among =
various network slice
>              >             instances which are the end-to-end =
realization of network
>              >             slicing, consisting of the combination of =
physically or
>              >             logically dedicated resources.
>              >
>              >
>              >     Thanks.
>              >     Young and Daniele
>              >     -----Original Message-----
>              >     From: Leeyoung
>              >     Sent: Friday, May 05, 2017 1:41 PM
>              >     To: teas@ietf.org
>              >     Subject: RE: [Teas] I-D Action:
>              > draft-ietf-teas-actn-framework-05.txt
>              >
>              >     Hi,
>              >
>              >     This update is intended to incorporate the comments =
from the last WG
>              >     meeting and any pending issues. We also have taken =
the global editorial
>              >     changes to make it consistent through the document. =
Major changes are:
>              >
>              >     - Inclusion of "network slicing" definition from =
ACTN perspective (in the
>              >     terminology section)
>              >     - Added virtual network service (VNS) section =
(Section 3) to define types
>              >     of VNS.
>              >     - Incorporated "orchestration" (service/network) =
mapping to ACTN
>              >     architecture (See Section 5.2)
>              >     - Created a new section 6 (Topology Abstraction =
Method) where we imported
>              >     some texts from ACTN abstraction method
>              >     =
https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>              >     - Added Appendices A & B to discuss example =
deployment scenarios such as
>              >     example of MDSC and PNC functions integrated in =
Service/Network
>              >     Orchestrator (Appendix A) and example of IP + =
Optical network with L3VPN
>              >     service (Appendix B)
>              >
>              >     In regard to ACTN abstraction method draft, we are =
going to keep it as a
>              >     separate draft and use this document to elaborate =
other aspects not
>              >     imported to the framework document.
>              >
>              >     The following diff pointer will help you see the =
changes with this revision:
>              >
>              > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>              >
>              >     The co-authors believe that the document is ready =
for WG LC. Any
>              >     changes/comments will be appreciated.
>              >
>              >     Thanks & Best regards,
>              >     Young & Daniele (on behalf of other =
co-authors/contributors)
>              >
>              >     -----Original Message-----
>              >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf =
Of internet-drafts@ietf.org
>              >     Sent: Friday, May 05, 2017 10:41 AM
>              >     To: i-d-announce@ietf.org
>              >     Cc: teas@ietf.org
>              >     Subject: [Teas] I-D Action: =
draft-ietf-teas-actn-framework-05.txt
>              >
>              >
>              >     A New Internet-Draft is available from the on-line =
Internet-Drafts directories.
>              >     This draft is a work item of the Traffic =
Engineering Architecture and
>              >     Signaling of the IETF.
>              >
>              >             Title           : Framework for Abstraction =
and Control of Traffic
>              >             Engineered Networks
>              >             Authors         : Daniele Ceccarelli
>              >                               Young Lee
>              >     	Filename        : =
draft-ietf-teas-actn-framework-05.txt
>              >     	Pages           : 41
>              >     	Date            : 2017-05-05
>              >
>              >     Abstract:
>              >        Traffic Engineered networks have a variety of =
mechanisms to
>              >        facilitate the separation of the data plane and =
control plane. They
>              >        also have a range of management and provisioning =
protocols to
>              >        configure and activate network resources.  These =
mechanisms
>              >        represent key technologies for enabling flexible =
and dynamic
>              >        networking.
>              >
>              >        Abstraction of network resources is a technique =
that can be applied
>              >        to a single network domain or across multiple =
domains to create a
>              >        single virtualized network that is under the =
control of a network
>              >        operator or the customer of the operator that =
actually owns
>              >        the network resources.
>              >
>              >        This document provides a framework for =
Abstraction and Control of
>              >        Traffic Engineered Networks (ACTN).
>              >
>              >
>              >
>              >     The IETF datatracker status page for this draft is:
>              >     =
https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>              >
>              >     There are also htmlized versions available at:
>              >     =
https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>              >
>              > =
https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
>              > 5
>              >
>              >     A diff from the previous version is available at:
>              >
>              > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>              >
>              >
>              >     Please note that it may take a couple of minutes =
from the time of
>              >     submission until the htmlized version and diff are =
available at tools.ietf.org.
>              >
>              >     Internet-Drafts are also available by anonymous FTP =
at:
>              >     ftp://ftp.ietf.org/internet-drafts/
>              >
>              >     _______________________________________________
>              >     Teas mailing list
>              >     Teas@ietf.org
>              >     https://www.ietf.org/mailman/listinfo/teas
>              >
>              >     _______________________________________________
>              >     Teas mailing list
>              >     Teas@ietf.org
>              >     https://www.ietf.org/mailman/listinfo/teas
>              >
>              >
>              > _______________________________________________
>              > Teas mailing list
>              > Teas@ietf.org
>              > https://www.ietf.org/mailman/listinfo/teas
>              >
>              > _______________________________________________
>              > Teas mailing list
>              > Teas@ietf.org
>              > https://www.ietf.org/mailman/listinfo/teas
>              >
>              > _______________________________________________
>              > Teas mailing list
>              > Teas@ietf.org
>              > https://www.ietf.org/mailman/listinfo/teas
>              >
>             =20
>             =20
>              _______________________________________________
>              Teas mailing list
>              Teas@ietf.org
>              https://www.ietf.org/mailman/listinfo/teas
>             =20
>              _______________________________________________
>              Teas mailing list
>              Teas@ietf.org
>              https://www.ietf.org/mailman/listinfo/teas
>             =20
>              _______________________________________________
>              Netslices mailing list
>              Netslices@ietf.org
>              https://www.ietf.org/mailman/listinfo/netslices
>              _______________________________________________
>              Teas mailing list
>              Teas@ietf.org
>              https://www.ietf.org/mailman/listinfo/teas
>             =20
>         =20
>         =20
>          _______________________________________________
>          Netslices mailing list
>          Netslices@ietf.org
>          https://www.ietf.org/mailman/listinfo/netslices
>         =20
>          _______________________________________________
>          Teas mailing list
>          Teas@ietf.org
>          https://www.ietf.org/mailman/listinfo/teas
>         =20
>     =20
>      _______________________________________________
>      Teas mailing list
>      Teas@ietf.org
>      https://www.ietf.org/mailman/listinfo/teas
>     =20
>
> _______________________________________________
> Netslices mailing list
> Netslices@ietf.org
> https://www.ietf.org/mailman/listinfo/netslices
>
> _______________________________________________
> Netslices mailing list
> Netslices@ietf.org
> https://www.ietf.org/mailman/listinfo/netslices

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From: Gert Grammel <ggrammel@juniper.net>
To: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>, "netslices@ietf.org" <netslices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netslices/SpozBayr5VGrM_crX2LXUIEZxH0>
Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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From: Igor Bryskin <Igor.Bryskin@huawei.com>
To: Gert Grammel <ggrammel@juniper.net>, Anton Ivanov <anton.ivanov@kot-begemot.co.uk>, "netslices@ietf.org" <netslices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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From: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Which is exactly my point.

IETF is not a 5G standards body and it is not its job to standardize the 
5G ecosystem.

A.
On 30/05/17 14:40, sebastian wrote:
> Hello, Anton,
>
> The 5G ecosystem contains pragmatic usage scenarios (mobile, fixed, verticals etc.) that require flexible orchestration methods that would enable various choices with respect to the span of an instantiated 'network slice'
>
> This would imply both 'segmented' and 'e2e' instantiations of a 'network slice' based on a given usage scenario.
> Signaling, orchestration, and interoperability, with respect to the required protocols and procedures would be relevant.
>
> Many thanks.
> -Sebastian
>
> -----Original Message-----
> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Anton Ivanov
> Sent: Tuesday, May 30, 2017 7:39 AM
> To: netslices@ietf.org
> Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>
>
>
> On 30/05/17 12:44, sebastian wrote:
>> Hello, Gert,
>>
>> Good points.
>>
>> There are various instantiations of a 'network slice' that are likely, based on a diverse array of usage scenarios.
>> These diverse instantiations of a 'network slice', with a corresponding allocation of the required logical or physical resources, should be allowed to suit different usage scenarios that may range from a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
>>
>> Hence a generalized definition for the instantiation of a 'network slice' such as the one referred to below (3GPP) is reasonable:
>>       "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
> That is excellent. And too broad. That can be anything from connection between two computers and a whole provider network. They both fit this rather elastic definition.
>
> So, in order for this to be discussed at IETF at all we should limit the scope a little bit to one or more subject areas worked on at IETF:
>
> 1. Layer 3 and higher protocols.
> 2. Models describing network abstractions 3. Interoperability with other IETF efforts.
>
> Otherwise, both the definition and the discussion should stay at 3GPP.
> They are good at discussing schemes of world domination, though from a point of view of network technology the results are quite often fit for Mr Bean, instead of Mr Blofeld (as intended).
>
> A.
>
>> Many thanks.
>> -Sebastian
>>
>> -----Original Message-----
>> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert
>> Grammel
>> Sent: Tuesday, May 30, 2017 6:17 AM
>> To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>;
>> teas@ietf.org
>> Cc: NetSlices@ietf.org
>> Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>>
>> Hi Daniele,
>>
>> See below for more details:
>>
>> On 2017-05-30, 10:17, "Daniele Ceccarelli" <daniele.ceccarelli@ericsson.com> wrote:
>>
>>       Ciao Gert,
>>       
>>       Please see in line
>>       Cheers
>>       Daniele
>>       
>>       
>>       -----Original Message-----
>>       From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>>       Sent: lunedì 29 maggio 2017 15:34
>>       To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>>       Cc: NetSlices@ietf.org
>>       Subject: Re: [Teas] [Netslices] terminology discussion network
>> slicing
>>       
>>       Daniele,
>>       
>>       Trying to summarize what you're saying: a Network slice is an overlay network with minimum service guarantees, including virtual network functions available in this overlay network.
>>       [>DC] why do you speak about an overlay network? If for example you have a site connected with a lambda to a data center and there you have a number of VNF, that's IMO a slice but there is no overlay. I'd say that there could be an overlay but that's not mandatory.
>> GGR> A Lambda travels through a WDM which is a Multiplexer (see discussion below). So a lambda is in my view an overlay, the multiplexed signal (OMS) being the underlay.
>>
>>
>>
>>       In your text I have issues with "dedicated to a given customer". Whether such construct is dedicated to one or shared among several legal customers shouldn't be of concern for the definition of a Network Slice.
>>       [>DC] Correct, it should be possible to have it dedicated or shared. We just need to make sure that both options are supported.
>> GGR>> So if it can either be dedicated or shared, why mentioning this at all? Is there anything else?
>>
>>       On similar terms, whether a resource (being a NF or transport capacity) is shared or not is a design choice rather than a definition. In particular, Multiplexer by definition share some sort of common capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the nature of multiplexing technique shouldn't be a definition criteria for a Network Slice either.
>>       
>>       Another food for thought:
>>       - I would also add that a network slice may use it's own internal addressing scheme isolated from other slices. While this is optional, I would expect it to be used quite often.
>>       [>DC] agree. Ala VPN.
>>
>>       - Why is it necessary to dedicate resources to a "Network Slice" at all? If e.g. a firewall NFV is in the DC and communicates over the Internet with a CPE (both belonging to a single owner) it would not fulfil the criteria of dedicated resource (Internet after all isn't dedicated), but it still looks pretty much like a "network slice".
>>
>>       [>DC] Think of remote surgery...wouldn't you want every single
>> part of the end to end network from the doctor's hands to the scalpel
>> being totally dedicated? :) ...and in that case I don't think the
>> packets would go through the internet
>> GGR>> There are a few issues here:
>> 1)	this example looks a bit out-dated to me. There is only a one-to-one relationship between doctor and patient. This is what I would call a classical client-server model with protected resources. Ask for SONET leased line circuits if this is what a "slice" would mean. In defining what constitutes a slice you would also have to think about what constitutes a "doctor-slice" and what would be a "patient-slice"? (assuming responsible health care to avoid sarcastic interpretation)
>> 2)	The question asked in my earlier email is whether the packets *must* go through a dedicated resource to call the thing "slice". In other words, if a thing that uses a non-dedicated "underlay" resource like the Internet can be called "slice" too? It is puzzling to me why the definition of "slice" would need any dedicated resource at all. It is in the end an implementers choice how much dedicated equipment is needed to provide a service. So why a slice has to use "dedicated resources", and what kind of "dedication" is meant? (See our earlier discussion about WDM)? Take your mobile as an example. It supports telephony and email. Those are different apps, potentially running in different VMs.
>> a.	Is your phone a shared device or a dedicated one?
>> b.	does using different apps means to use a different slices?
>> c.	If you write emails to different recipients, would that qualify your email to be "dedicated", hence a different slice, just because they are in different address books?
>> d.	If you switch from 3G to VoIP, does it mean to switch the slice, even if it is the same app?
>>
>> GGR> My thinking is that the definition of "slice" needs to make practical sense. The 3GPP definition is probably a bit too high level but makes sense to me:
>>       "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>>
>>       Gert
>>       
>>       On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" <teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> wrote:
>>       
>>           Hi Sebastian, Jeff, Igor, all,
>>           
>>           I understand Jeff and Igor agree on the fact that a network slice does not necessarily include resources in the radio segment/domain and in the packet core one.
>>           An example could be an enterprise with dedicated resources in the "transport" segment (e.g. VPN, VN and TE-tunnels) that connect the customer premises to a data center where a number of VNF (e.g. firewall, nat, dpi) is dedicated to that given customer.
>>           My personal opinion is that this should be considered a network slice.
>>           
>>           The definition of network slice should allow for this scenario and mostly should clearly state whether this is included or not.
>>           
>>           Sebastian, I don't understand if your statement:
>>           " The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains."
>>           implies that there must be a radio and a core segment in order to have a slice.
>>           
>>           BR
>>           Daniele
>>           
>>           
>>           -----Original Message-----
>>           From: sebastian [mailto:comscape@gmail.com]
>>           Sent: domenica 28 maggio 2017 07:12
>>           To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>>           Cc: NetSlices@ietf.org
>>           Subject: RE: [Netslices] [Teas] terminology discussion
>> network slicing
>>           
>>           Hello, Jeff,
>>           
>>           Agree with your view that the scope (core and/or radio layer) of a 'network slice' could vary depending on the triggers for instantiating the 'network slice'.
>>           
>>           On the other hand the instantiation of a 'network slice' may also be e2e (end-to-end), such as in device roaming scenarios, or in the case of vertical services that span different service providers.
>>           
>>           The span of a 'network slice' is only limited by the availability of resources and appropriate policies (e.g. SLAs), independent of whether those resources are in the core network layer or in the radio network layer.
>>           
>>           The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains.
>>           
>>           Many thanks.
>>           -Sebastian
>>           
>>           
>>           -----Original Message-----
>>           From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor Bryskin
>>           Sent: Wednesday, May 24, 2017 7:56 AM
>>           To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org
>>           Cc: NetSlices@ietf.org
>>           Subject: Re: [Netslices] [Teas] terminology discussion
>> network slicing
>>           
>>           Thanks Jeff,
>>           
>>           I am glad we are in sync.
>>           
>>           Igor
>>           
>>           -----Original Message-----
>>           From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
>>           Sent: Wednesday, May 24, 2017 8:45 AM
>>           To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>           Cc: NetSlices@ietf.org
>>           Subject: Re: [Teas] terminology discussion network slicing
>>           
>>           +1 Igor
>>           
>>           From transport side (L0-L3) we need to expose set of API’s that would allow to request a set of resources (a slice) either virtualized of physical that meet the constrains as requested by the business logic. Radio, while would definitely be one of most important use cases, would not be exclusively for radio use only. Any network management/ orchestration layer ideally should be able to use same set of API’s to request an e2e service.
>>           
>>           Cheers,
>>           Jeff
>>            
>>           
>>           On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" <teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
>>           
>>               Hi Cristina,
>>               
>>               I didn’t say that ns has nothing to do with radio. I said that ns *may* have nothing to do with radio, i.e. may support/enable network architectures that do not involve radio necessarily.
>>               
>>               Igor
>>               
>>               -----Original Message-----
>>               From: qiangli (D)
>>               Sent: Wednesday, May 24, 2017 5:05 AM
>>               To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>               Cc: NetSlices@ietf.org
>>               Subject: 答复: [Teas] terminology discussion network
>> slicing
>>               
>>               Hi Igor,
>>               
>>               I share the same opinion on 5G and network slicing, but can't see the relation between this opinion and your conclusion that ns has nothing to do with radio.
>>               
>>               Best regards,
>>               
>>               Cristina QIANG
>>               
>>               
>>               -----邮件原件-----
>>               发件人: Igor Bryskin
>>               发送时间: 2017年5月20日 23:50
>>               收件人: qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>               抄送: NetSlices@ietf.org
>>               主题: RE: [Teas] terminology discussion network slicing
>>               
>>               Hi Cristina,
>>               
>>               People whose opinion I respect very much told me that even the 3GPP network slicing definition and effort is not 5G specific.  Network slicing is viewed as an important capability of 5G, but it could serve other architectures.
>>               
>>               Cheers,
>>               Igor
>>               
>>               -----Original Message-----
>>               From: qiangli (D)
>>               Sent: Saturday, May 20, 2017 5:27 AM
>>               To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>               Cc: NetSlices@ietf.org
>>               Subject: 答复: [Teas] terminology discussion network
>> slicing
>>               
>>               Hi Igor,
>>               
>>               I have different opinion on " Network slicing may have nothing to do with radio".
>>               IMO, network slicing should be a resource-oriented management mode. The end-to-end network slice (from UE to server/other UE) of course involves the radio resource, usually we use the word "RAN-radio access network" rather than simply say "radio". The Frequency band, time, code, equipment/site, and software are a number of dimensions, in which RAN resources can be isolated [Online available http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-service-guaranteed-network-slicing-whitepaper].
>>               
>>               Best regards,
>>               
>>               Qiang, Li (Cristina)
>>               NetLab, Huawei
>>               
>>               
>>               -----邮件原件-----
>>               发件人: Netslices [mailto:netslices-bounces@ietf.org] 代表 Igor Bryskin
>>               发送时间: 2017年5月20日 6:12
>>               收件人: Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>               抄送: NetSlices@ietf.org
>>               主题: Re: [Netslices] [Teas] terminology discussion network
>> slicing
>>               
>>               Hi Danielle,
>>               
>>               Network slicing may have nothing to do with radio. 5g is just a big reason as to why the interest/focus is back on network slicing, which is a very old concept. I don't think that anyone is arguing with what you wrote. The questions are:
>>               a) how do you manage these "pieces"?
>>               b) what policy infrastructure should be put in place?
>>               c) how do you ensure their separation or, conversely, the degree of resource sharing?
>>               d) why exactly legacy VPNs are not good enough?
>>               
>>               Cheers,
>>               Igor
>>               
>>               
>>                 
>>               
>>               -----Original Message-----
>>               From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
>>               Sent: Friday, May 19, 2017 4:19 PM
>>               To: Leeyoung; teas@ietf.org
>>               Cc: NetSlices@ietf.org
>>               Subject: Re: [Teas] terminology discussion network
>> slicing
>>               
>>               Hi Young, all,
>>               
>>               i agree with your conclusion but would like to clarify one thing that IMO got lost in the discussion since its beginning.
>>               
>>               The 3GPP definition says:
>>               "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>>               
>>               This means that a network slice IS NOT a VPN or a TE Tunnel.
>>               A network slice is "something" (netslices and 3GPP will define what this something is) that is composed by a "piece" in the RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other pieces in possible other domains.
>>               
>>               The word "transport" can be misleading here since one could think of transport technologies (e.g. WDM, OTN), but what I'm referring to as TRANSPORT DOMAIN is that part of the network that is used to carry a packet between two other domains.
>>               In order to have a slice, that portion of the transport domain needs to be engineered, hence it is all about building a TE entity and stitching services to such entity. This is what is in the ACTN scope.
>>               
>>               My very personal opinion is that whatever belongs to the transport domain belongs to IETF (and is already being addressed), while the rest is a dangerous duplication of concepts standardized is other SDOs...but this is another discussion that doesn't fit here.
>>               
>>               BR
>>               Daniele
>>               
>>               
>>               -----Original Message-----
>>               From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
>>               Sent: venerdì 19 maggio 2017 15:15
>>               To: teas@ietf.org
>>               Cc: NetSlices@ietf.org
>>               Subject: Re: [Teas] terminology discussion network
>> slicing
>>               
>>               Hi,
>>               
>>               Lou is right. There is a dedicated email list for the discussion of "network slicing (cc'ed)" and the discussion about what that term means should be held on that list.
>>               
>>               We have used similar language in draft-ietf-teas-actn-framework right from the
>>               00 version. Recent changes have been an attempt to clarify what the terminology means in the context of ACTN. We are not trying to define or redefine "network slicing" in the ACTN document, but are trying to make it clear how ACTN works.
>>               
>>               Therefore I propose the following resolution:
>>               
>>               1. All discussion of the general applicability and definition of "network slicing" is held on the netslices mailing list.
>>               
>>               2. We adopt Adrian's suggestion to explain that the scope of the definition of the terms used in the ACTN framework is limited to ACTN. That means effectively that if there are components of a wider definition of network slicing that are not supported by ACTN, that will be OK.
>>               
>>               I propose to post an updated version in the next few days and I believe that will allow this draft to move ahead without being blocked by the discussion in netslices. Once the IETF has a stable definition of network slicing we can return and see how ACTN is applicable to that definition an whether more wok is need (in a separate draft).
>>               
>>               Thanks,
>>               Young
>>               
>>               -----Original Message-----
>>               From: Lou Berger [mailto:lberger@labn.net]
>>               Sent: Tuesday, May 16, 2017 8:35 AM
>>               To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>>               Subject: Re: [Teas] terminology discussion network
>> slicing
>>               
>>               Perhaps it's time to bring the discussion to the slicing list and report back their reaponse....
>>               
>>               Lou
>>               
>>               
>>               On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:
>>               
>>               > Hi Sergio,
>>               >
>>               > I would also like to hear more from network slicing experts.
>>               >
>>               > My understanding is that the difference in the separation (in terms of
>>               > control and data planes, security, etc.). For example, traditional BGP
>>               > based L3 VPNs (that use provider's common control plane for their
>>               > management and IP/MPLS TE tunnels to inter-connect their PEs) will
>>               > probably not be able guarantee for the clients msec range connectivity
>>               > setup times required by 5g, while provided by the same provider fully
>>               > separated/genuinely private IP/MPLS networks (that do not share
>>               > IP/MPLS control plane and infrastructure, whose network topology is
>>               > supported by separate L0/L1 connections) hopefully will be able to
>>               > provide such guarantees. Therefore, I define layer network slices as
>>               > dynamically managed fully isolated in control and data planes private
>>               > TE layer networks, which may share one or more underlying server layer networks.
>>               >
>>               >
>>               > Cheers,
>>               > Igor
>>               >
>>               >
>>               >
>>               >
>>               > -----Original Message-----
>>               > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio
>>               > (Nokia - IT/Vimercate)
>>               > Sent: Tuesday, May 16, 2017 6:08 AM
>>               > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
>>               > Subject: Re: [Teas] terminology discussion network slicing
>>               >
>>               > Hi Gert,
>>               >
>>               > "Thinking a bit about it I came to the point where "VPN" and "network
>>               > slices" seem to describe the same entity or at least a "network slice"
>>               > being a VPN of VPNs?"
>>               >
>>               > I share completely your conclusion , I'd like if someone can explain
>>               > if a difference really exists .
>>               >
>>               > Thanks
>>               > Sergio
>>               >
>>               >
>>               > -----Original Message-----
>>               > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>>               > Sent: Monday, May 15, 2017 7:02 PM
>>               > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>>               > Subject: Re: [Teas] terminology discussion network slicing
>>               >
>>               > Leeyoung,
>>               >
>>               > Thank you for taking a stab on this. Usually when getting to a
>>               > definition, I try to establish what kind of existing constructs would
>>               > fall under the definition. If my understanding is correct, the
>>               > following list of constructs would all satisfy the definition somehow.
>>               > - A TDM network with a p2p TDM connection
>>               > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
>>               > - An MPLS LSP using a traffic engineered IP network
>>               > - A L2VPN using a traffic engineered MPLS network
>>               > - A L3VPN using a traffic engineered IP network
>>               > - A TCP connection using a traffic engineered IP network
>>               > - Different QoS classes in an IP network
>>               >
>>               > Thinking a bit about it I came to the point where "VPN" and "network
>>               > slices" seem to describe the same entity or at least a "network slice"
>>               > being a VPN of VPNs?
>>               >
>>               > Gert
>>               >
>>               >
>>               > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
>>               > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>>               >
>>               >     Hi Adrian and others,
>>               >
>>               >     We'd like cross check with you on some terminology we introduced newly. Any
>>               >     comment on these terms will be greatly appreciated.
>>               >
>>               >     We introduced 'network slicing' as follows:
>>               >
>>               >             Network slicing is a collection of resources
>>               >             that are used to establish logically dedicated virtual networks
>>               >             over TE networks. It allows a network provider to provide
>>               >             dedicated virtual networks for application/customer over a
>>               >             common network infrastructure. The logically dedicated
>>               >             resources are a part of the larger common network
>>               >             infrastructures that are shared among various network slice
>>               >             instances which are the end-to-end realization of network
>>               >             slicing, consisting of the combination of physically or
>>               >             logically dedicated resources.
>>               >
>>               >
>>               >     Thanks.
>>               >     Young and Daniele
>>               >     -----Original Message-----
>>               >     From: Leeyoung
>>               >     Sent: Friday, May 05, 2017 1:41 PM
>>               >     To: teas@ietf.org
>>               >     Subject: RE: [Teas] I-D Action:
>>               > draft-ietf-teas-actn-framework-05.txt
>>               >
>>               >     Hi,
>>               >
>>               >     This update is intended to incorporate the comments from the last WG
>>               >     meeting and any pending issues. We also have taken the global editorial
>>               >     changes to make it consistent through the document. Major changes are:
>>               >
>>               >     - Inclusion of "network slicing" definition from ACTN perspective (in the
>>               >     terminology section)
>>               >     - Added virtual network service (VNS) section (Section 3) to define types
>>               >     of VNS.
>>               >     - Incorporated "orchestration" (service/network) mapping to ACTN
>>               >     architecture (See Section 5.2)
>>               >     - Created a new section 6 (Topology Abstraction Method) where we imported
>>               >     some texts from ACTN abstraction method
>>               >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>>               >     - Added Appendices A & B to discuss example deployment scenarios such as
>>               >     example of MDSC and PNC functions integrated in Service/Network
>>               >     Orchestrator (Appendix A) and example of IP + Optical network with L3VPN
>>               >     service (Appendix B)
>>               >
>>               >     In regard to ACTN abstraction method draft, we are going to keep it as a
>>               >     separate draft and use this document to elaborate other aspects not
>>               >     imported to the framework document.
>>               >
>>               >     The following diff pointer will help you see the changes with this revision:
>>               >
>>               > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>>               >
>>               >     The co-authors believe that the document is ready for WG LC. Any
>>               >     changes/comments will be appreciated.
>>               >
>>               >     Thanks & Best regards,
>>               >     Young & Daniele (on behalf of other co-authors/contributors)
>>               >
>>               >     -----Original Message-----
>>               >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-drafts@ietf.org
>>               >     Sent: Friday, May 05, 2017 10:41 AM
>>               >     To: i-d-announce@ietf.org
>>               >     Cc: teas@ietf.org
>>               >     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>>               >
>>               >
>>               >     A New Internet-Draft is available from the on-line Internet-Drafts directories.
>>               >     This draft is a work item of the Traffic Engineering Architecture and
>>               >     Signaling of the IETF.
>>               >
>>               >             Title           : Framework for Abstraction and Control of Traffic
>>               >             Engineered Networks
>>               >             Authors         : Daniele Ceccarelli
>>               >                               Young Lee
>>               >     	Filename        : draft-ietf-teas-actn-framework-05.txt
>>               >     	Pages           : 41
>>               >     	Date            : 2017-05-05
>>               >
>>               >     Abstract:
>>               >        Traffic Engineered networks have a variety of mechanisms to
>>               >        facilitate the separation of the data plane and control plane. They
>>               >        also have a range of management and provisioning protocols to
>>               >        configure and activate network resources.  These mechanisms
>>               >        represent key technologies for enabling flexible and dynamic
>>               >        networking.
>>               >
>>               >        Abstraction of network resources is a technique that can be applied
>>               >        to a single network domain or across multiple domains to create a
>>               >        single virtualized network that is under the control of a network
>>               >        operator or the customer of the operator that actually owns
>>               >        the network resources.
>>               >
>>               >        This document provides a framework for Abstraction and Control of
>>               >        Traffic Engineered Networks (ACTN).
>>               >
>>               >
>>               >
>>               >     The IETF datatracker status page for this draft is:
>>               >     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>>               >
>>               >     There are also htmlized versions available at:
>>               >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>>               >
>>               > https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
>>               > 5
>>               >
>>               >     A diff from the previous version is available at:
>>               >
>>               > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>>               >
>>               >
>>               >     Please note that it may take a couple of minutes from the time of
>>               >     submission until the htmlized version and diff are available at tools.ietf.org.
>>               >
>>               >     Internet-Drafts are also available by anonymous FTP at:
>>               >     ftp://ftp.ietf.org/internet-drafts/
>>               >
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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What is a slice is more or less defined by 3GPP.

The issue is - what SUBSET of slicing problem space will IETF tackle?

The 3GPP definition is so ridiculously broad that it is of no use at 
all. It has to be narrowed down and cut to size so it can be worked on.

We have to be realistic, stick to stuff which is in scope and which has 
overlap to existing IETF problem space.

A.


On 30/05/17 15:58, Thomas Nadeau wrote:
> 	I am still having difficulty understanding just what this group is trying to accomplish.
> The best I can figure from these discussions has been a definition that a slice is
> an overlay of some sort, which as we all know, has been defined well in a number of
> forms, for a number of years.
>
> 	—Tom
>
>
>> On May 30, 2017:9:54 AM, at 9:54 AM, Gert Grammel <ggrammel@juniper.net> wrote:
>>
>> Anton,
>>
>> We are in agreement that the 3GPP definition is too high level. It is useful however that it stays away from a few arguments that frequently come up in our discussion:
>> - It doesn't say end-to-end – hence no need to define "The End"
>> - It doesn't require "dedicated" resources, hence no need to define levels of dedication
>> - It doesn't use the term "layer", hence no need to define what a Layer would mean
>> - It doesn't use "owner" to express a technical relation
>>
>> I am all for adding meat to above definition but at the same time reluctant to fall back using controversial terminology.
>>
>> Gert
>>
>>
>>
>>
>>
>> On 2017-05-30, 14:39, "Netslices on behalf of Anton Ivanov" <netslices-bounces@ietf.org on behalf of anton.ivanov@kot-begemot.co.uk> wrote:
>>
>>
>>
>>     On 30/05/17 12:44, sebastian wrote:
>>> Hello, Gert,
>>>
>>> Good points.
>>>
>>> There are various instantiations of a 'network slice' that are likely, based on a diverse array of usage scenarios.
>>> These diverse instantiations of a 'network slice', with a corresponding allocation of the required logical or physical resources, should be allowed to suit different usage scenarios that may range from a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
>>>
>>> Hence a generalized definition for the instantiation of a 'network slice' such as the one referred to below (3GPP) is reasonable:
>>>      "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>>     That is excellent. And too broad. That can be anything from connection
>>     between two computers and a whole provider network. They both fit this
>>     rather elastic definition.
>>
>>     So, in order for this to be discussed at IETF at all we should limit the
>>     scope a little bit to one or more subject areas worked on at IETF:
>>
>>     1. Layer 3 and higher protocols.
>>     2. Models describing network abstractions
>>     3. Interoperability with other IETF efforts.
>>
>>     Otherwise, both the definition and the discussion should stay at 3GPP.
>>     They are good at discussing schemes of world domination, though from a
>>     point of view of network technology the results are quite often fit for
>>     Mr Bean, instead of Mr Blofeld (as intended).
>>
>>     A.
>>
>>> Many thanks.
>>> -Sebastian
>>>
>>> -----Original Message-----
>>> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert Grammel
>>> Sent: Tuesday, May 30, 2017 6:17 AM
>>> To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; teas@ietf.org
>>> Cc: NetSlices@ietf.org
>>> Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>>>
>>> Hi Daniele,
>>>
>>> See below for more details:
>>>
>>> On 2017-05-30, 10:17, "Daniele Ceccarelli" <daniele.ceccarelli@ericsson.com> wrote:
>>>
>>>      Ciao Gert,
>>>
>>>      Please see in line
>>>      Cheers
>>>      Daniele
>>>
>>>
>>>      -----Original Message-----
>>>      From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>>>      Sent: lunedì 29 maggio 2017 15:34
>>>      To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>>>      Cc: NetSlices@ietf.org
>>>      Subject: Re: [Teas] [Netslices] terminology discussion network slicing
>>>
>>>      Daniele,
>>>
>>>      Trying to summarize what you're saying: a Network slice is an overlay network with minimum service guarantees, including virtual network functions available in this overlay network.
>>>      [>DC] why do you speak about an overlay network? If for example you have a site connected with a lambda to a data center and there you have a number of VNF, that's IMO a slice but there is no overlay. I'd say that there could be an overlay but that's not mandatory.
>>> GGR> A Lambda travels through a WDM which is a Multiplexer (see discussion below). So a lambda is in my view an overlay, the multiplexed signal (OMS) being the underlay.
>>>
>>>
>>>
>>>      In your text I have issues with "dedicated to a given customer". Whether such construct is dedicated to one or shared among several legal customers shouldn't be of concern for the definition of a Network Slice.
>>>      [>DC] Correct, it should be possible to have it dedicated or shared. We just need to make sure that both options are supported.
>>> GGR>> So if it can either be dedicated or shared, why mentioning this at all? Is there anything else?
>>>
>>>      On similar terms, whether a resource (being a NF or transport capacity) is shared or not is a design choice rather than a definition. In particular, Multiplexer by definition share some sort of common capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the nature of multiplexing technique shouldn't be a definition criteria for a Network Slice either.
>>>
>>>      Another food for thought:
>>>      - I would also add that a network slice may use it's own internal addressing scheme isolated from other slices. While this is optional, I would expect it to be used quite often.
>>>      [>DC] agree. Ala VPN.
>>>
>>>      - Why is it necessary to dedicate resources to a "Network Slice" at all? If e.g. a firewall NFV is in the DC and communicates over the Internet with a CPE (both belonging to a single owner) it would not fulfil the criteria of dedicated resource (Internet after all isn't dedicated), but it still looks pretty much like a "network slice".
>>>
>>>      [>DC] Think of remote surgery...wouldn't you want every single part of the end to end network from the doctor's hands to the scalpel being totally dedicated? :) ...and in that case I don't think the packets would go through the internet
>>> GGR>> There are a few issues here:
>>> 1)	this example looks a bit out-dated to me. There is only a one-to-one relationship between doctor and patient. This is what I would call a classical client-server model with protected resources. Ask for SONET leased line circuits if this is what a "slice" would mean. In defining what constitutes a slice you would also have to think about what constitutes a "doctor-slice" and what would be a "patient-slice"? (assuming responsible health care to avoid sarcastic interpretation)
>>> 2)	The question asked in my earlier email is whether the packets *must* go through a dedicated resource to call the thing "slice". In other words, if a thing that uses a non-dedicated "underlay" resource like the Internet can be called "slice" too? It is puzzling to me why the definition of "slice" would need any dedicated resource at all. It is in the end an implementers choice how much dedicated equipment is needed to provide a service. So why a slice has to use "dedicated resources", and what kind of "dedication" is meant? (See our earlier discussion about WDM)? Take your mobile as an example. It supports telephony and email. Those are different apps, potentially running in different VMs.
>>> a.	Is your phone a shared device or a dedicated one?
>>> b.	does using different apps means to use a different slices?
>>> c.	If you write emails to different recipients, would that qualify your email to be "dedicated", hence a different slice, just because they are in different address books?
>>> d.	If you switch from 3G to VoIP, does it mean to switch the slice, even if it is the same app?
>>>
>>> GGR> My thinking is that the definition of "slice" needs to make practical sense. The 3GPP definition is probably a bit too high level but makes sense to me:
>>>      "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>>>
>>>      Gert
>>>
>>>      On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" <teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> wrote:
>>>
>>>          Hi Sebastian, Jeff, Igor, all,
>>>
>>>          I understand Jeff and Igor agree on the fact that a network slice does not necessarily include resources in the radio segment/domain and in the packet core one.
>>>          An example could be an enterprise with dedicated resources in the "transport" segment (e.g. VPN, VN and TE-tunnels) that connect the customer premises to a data center where a number of VNF (e.g. firewall, nat, dpi) is dedicated to that given customer.
>>>          My personal opinion is that this should be considered a network slice.
>>>
>>>          The definition of network slice should allow for this scenario and mostly should clearly state whether this is included or not.
>>>
>>>          Sebastian, I don't understand if your statement:
>>>          " The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains."
>>>          implies that there must be a radio and a core segment in order to have a slice.
>>>
>>>          BR
>>>          Daniele
>>>
>>>
>>>          -----Original Message-----
>>>          From: sebastian [mailto:comscape@gmail.com]
>>>          Sent: domenica 28 maggio 2017 07:12
>>>          To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>>>          Cc: NetSlices@ietf.org
>>>          Subject: RE: [Netslices] [Teas] terminology discussion network slicing
>>>
>>>          Hello, Jeff,
>>>
>>>          Agree with your view that the scope (core and/or radio layer) of a 'network slice' could vary depending on the triggers for instantiating the 'network slice'.
>>>
>>>          On the other hand the instantiation of a 'network slice' may also be e2e (end-to-end), such as in device roaming scenarios, or in the case of vertical services that span different service providers.
>>>
>>>          The span of a 'network slice' is only limited by the availability of resources and appropriate policies (e.g. SLAs), independent of whether those resources are in the core network layer or in the radio network layer.
>>>
>>>          The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains.
>>>
>>>          Many thanks.
>>>          -Sebastian
>>>
>>>
>>>          -----Original Message-----
>>>          From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor Bryskin
>>>          Sent: Wednesday, May 24, 2017 7:56 AM
>>>          To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org
>>>          Cc: NetSlices@ietf.org
>>>          Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>>>
>>>          Thanks Jeff,
>>>
>>>          I am glad we are in sync.
>>>
>>>          Igor
>>>
>>>          -----Original Message-----
>>>          From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
>>>          Sent: Wednesday, May 24, 2017 8:45 AM
>>>          To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>>          Cc: NetSlices@ietf.org
>>>          Subject: Re: [Teas] terminology discussion network slicing
>>>
>>>          +1 Igor
>>>
>>>          From transport side (L0-L3) we need to expose set of API’s that would allow to request a set of resources (a slice) either virtualized of physical that meet the constrains as requested by the business logic. Radio, while would definitely be one of most important use cases, would not be exclusively for radio use only. Any network management/ orchestration layer ideally should be able to use same set of API’s to request an e2e service.
>>>
>>>          Cheers,
>>>          Jeff
>>>
>>>
>>>          On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" <teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
>>>
>>>              Hi Cristina,
>>>
>>>              I didn’t say that ns has nothing to do with radio. I said that ns *may* have nothing to do with radio, i.e. may support/enable network architectures that do not involve radio necessarily.
>>>
>>>              Igor
>>>
>>>              -----Original Message-----
>>>              From: qiangli (D)
>>>              Sent: Wednesday, May 24, 2017 5:05 AM
>>>              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>>              Cc: NetSlices@ietf.org
>>>              Subject: 答复: [Teas] terminology discussion network slicing
>>>
>>>              Hi Igor,
>>>
>>>              I share the same opinion on 5G and network slicing, but can't see the relation between this opinion and your conclusion that ns has nothing to do with radio.
>>>
>>>              Best regards,
>>>
>>>              Cristina QIANG
>>>
>>>
>>>              -----邮件原件-----
>>>              发件人: Igor Bryskin
>>>              发送时间: 2017年5月20日 23:50
>>>              收件人: qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>>              抄送: NetSlices@ietf.org
>>>              主题: RE: [Teas] terminology discussion network slicing
>>>
>>>              Hi Cristina,
>>>
>>>              People whose opinion I respect very much told me that even the 3GPP network slicing definition and effort is not 5G specific.  Network slicing is viewed as an important capability of 5G, but it could serve other architectures.
>>>
>>>              Cheers,
>>>              Igor
>>>
>>>              -----Original Message-----
>>>              From: qiangli (D)
>>>              Sent: Saturday, May 20, 2017 5:27 AM
>>>              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>>              Cc: NetSlices@ietf.org
>>>              Subject: 答复: [Teas] terminology discussion network slicing
>>>
>>>              Hi Igor,
>>>
>>>              I have different opinion on " Network slicing may have nothing to do with radio".
>>>              IMO, network slicing should be a resource-oriented management mode. The end-to-end network slice (from UE to server/other UE) of course involves the radio resource, usually we use the word "RAN-radio access network" rather than simply say "radio". The Frequency band, time, code, equipment/site, and software are a number of dimensions, in which RAN resources can be isolated [Online available http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-service-guaranteed-network-slicing-whitepaper].
>>>
>>>              Best regards,
>>>
>>>              Qiang, Li (Cristina)
>>>              NetLab, Huawei
>>>
>>>
>>>              -----邮件原件-----
>>>              发件人: Netslices [mailto:netslices-bounces@ietf.org] 代表 Igor Bryskin
>>>              发送时间: 2017年5月20日 6:12
>>>              收件人: Daniele Ceccarelli; Leeyoung; teas@ietf.org
>>>              抄送: NetSlices@ietf.org
>>>              主题: Re: [Netslices] [Teas] terminology discussion network slicing
>>>
>>>              Hi Danielle,
>>>
>>>              Network slicing may have nothing to do with radio. 5g is just a big reason as to why the interest/focus is back on network slicing, which is a very old concept. I don't think that anyone is arguing with what you wrote. The questions are:
>>>              a) how do you manage these "pieces"?
>>>              b) what policy infrastructure should be put in place?
>>>              c) how do you ensure their separation or, conversely, the degree of resource sharing?
>>>              d) why exactly legacy VPNs are not good enough?
>>>
>>>              Cheers,
>>>              Igor
>>>
>>>
>>>
>>>
>>>              -----Original Message-----
>>>              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
>>>              Sent: Friday, May 19, 2017 4:19 PM
>>>              To: Leeyoung; teas@ietf.org
>>>              Cc: NetSlices@ietf.org
>>>              Subject: Re: [Teas] terminology discussion network slicing
>>>
>>>              Hi Young, all,
>>>
>>>              i agree with your conclusion but would like to clarify one thing that IMO got lost in the discussion since its beginning.
>>>
>>>              The 3GPP definition says:
>>>              "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>>>
>>>              This means that a network slice IS NOT a VPN or a TE Tunnel.
>>>              A network slice is "something" (netslices and 3GPP will define what this something is) that is composed by a "piece" in the RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other pieces in possible other domains.
>>>
>>>              The word "transport" can be misleading here since one could think of transport technologies (e.g. WDM, OTN), but what I'm referring to as TRANSPORT DOMAIN is that part of the network that is used to carry a packet between two other domains.
>>>              In order to have a slice, that portion of the transport domain needs to be engineered, hence it is all about building a TE entity and stitching services to such entity. This is what is in the ACTN scope.
>>>
>>>              My very personal opinion is that whatever belongs to the transport domain belongs to IETF (and is already being addressed), while the rest is a dangerous duplication of concepts standardized is other SDOs...but this is another discussion that doesn't fit here.
>>>
>>>              BR
>>>              Daniele
>>>
>>>
>>>              -----Original Message-----
>>>              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
>>>              Sent: venerdì 19 maggio 2017 15:15
>>>              To: teas@ietf.org
>>>              Cc: NetSlices@ietf.org
>>>              Subject: Re: [Teas] terminology discussion network slicing
>>>
>>>              Hi,
>>>
>>>              Lou is right. There is a dedicated email list for the discussion of "network slicing (cc'ed)" and the discussion about what that term means should be held on that list.
>>>
>>>              We have used similar language in draft-ietf-teas-actn-framework right from the
>>>              00 version. Recent changes have been an attempt to clarify what the terminology means in the context of ACTN. We are not trying to define or redefine "network slicing" in the ACTN document, but are trying to make it clear how ACTN works.
>>>
>>>              Therefore I propose the following resolution:
>>>
>>>              1. All discussion of the general applicability and definition of "network slicing" is held on the netslices mailing list.
>>>
>>>              2. We adopt Adrian's suggestion to explain that the scope of the definition of the terms used in the ACTN framework is limited to ACTN. That means effectively that if there are components of a wider definition of network slicing that are not supported by ACTN, that will be OK.
>>>
>>>              I propose to post an updated version in the next few days and I believe that will allow this draft to move ahead without being blocked by the discussion in netslices. Once the IETF has a stable definition of network slicing we can return and see how ACTN is applicable to that definition an whether more wok is need (in a separate draft).
>>>
>>>              Thanks,
>>>              Young
>>>
>>>              -----Original Message-----
>>>              From: Lou Berger [mailto:lberger@labn.net]
>>>              Sent: Tuesday, May 16, 2017 8:35 AM
>>>              To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>>>              Subject: Re: [Teas] terminology discussion network slicing
>>>
>>>              Perhaps it's time to bring the discussion to the slicing list and report back their reaponse....
>>>
>>>              Lou
>>>
>>>
>>>              On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:
>>>
>>>> Hi Sergio,
>>>>
>>>> I would also like to hear more from network slicing experts.
>>>>
>>>> My understanding is that the difference in the separation (in terms of
>>>> control and data planes, security, etc.). For example, traditional BGP
>>>> based L3 VPNs (that use provider's common control plane for their
>>>> management and IP/MPLS TE tunnels to inter-connect their PEs) will
>>>> probably not be able guarantee for the clients msec range connectivity
>>>> setup times required by 5g, while provided by the same provider fully
>>>> separated/genuinely private IP/MPLS networks (that do not share
>>>> IP/MPLS control plane and infrastructure, whose network topology is
>>>> supported by separate L0/L1 connections) hopefully will be able to
>>>> provide such guarantees. Therefore, I define layer network slices as
>>>> dynamically managed fully isolated in control and data planes private
>>>> TE layer networks, which may share one or more underlying server layer networks.
>>>>
>>>>
>>>> Cheers,
>>>> Igor
>>>>
>>>>
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio
>>>> (Nokia - IT/Vimercate)
>>>> Sent: Tuesday, May 16, 2017 6:08 AM
>>>> To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
>>>> Subject: Re: [Teas] terminology discussion network slicing
>>>>
>>>> Hi Gert,
>>>>
>>>> "Thinking a bit about it I came to the point where "VPN" and "network
>>>> slices" seem to describe the same entity or at least a "network slice"
>>>> being a VPN of VPNs?"
>>>>
>>>> I share completely your conclusion , I'd like if someone can explain
>>>> if a difference really exists .
>>>>
>>>> Thanks
>>>> Sergio
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>>>> Sent: Monday, May 15, 2017 7:02 PM
>>>> To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>>>> Subject: Re: [Teas] terminology discussion network slicing
>>>>
>>>> Leeyoung,
>>>>
>>>> Thank you for taking a stab on this. Usually when getting to a
>>>> definition, I try to establish what kind of existing constructs would
>>>> fall under the definition. If my understanding is correct, the
>>>> following list of constructs would all satisfy the definition somehow.
>>>> - A TDM network with a p2p TDM connection
>>>> - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
>>>> - An MPLS LSP using a traffic engineered IP network
>>>> - A L2VPN using a traffic engineered MPLS network
>>>> - A L3VPN using a traffic engineered IP network
>>>> - A TCP connection using a traffic engineered IP network
>>>> - Different QoS classes in an IP network
>>>>
>>>> Thinking a bit about it I came to the point where "VPN" and "network
>>>> slices" seem to describe the same entity or at least a "network slice"
>>>> being a VPN of VPNs?
>>>>
>>>> Gert
>>>>
>>>>
>>>> On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
>>>> <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>>>>
>>>>     Hi Adrian and others,
>>>>
>>>>     We'd like cross check with you on some terminology we introduced newly. Any
>>>>     comment on these terms will be greatly appreciated.
>>>>
>>>>     We introduced 'network slicing' as follows:
>>>>
>>>>             Network slicing is a collection of resources
>>>>             that are used to establish logically dedicated virtual networks
>>>>             over TE networks. It allows a network provider to provide
>>>>             dedicated virtual networks for application/customer over a
>>>>             common network infrastructure. The logically dedicated
>>>>             resources are a part of the larger common network
>>>>             infrastructures that are shared among various network slice
>>>>             instances which are the end-to-end realization of network
>>>>             slicing, consisting of the combination of physically or
>>>>             logically dedicated resources.
>>>>
>>>>
>>>>     Thanks.
>>>>     Young and Daniele
>>>>     -----Original Message-----
>>>>     From: Leeyoung
>>>>     Sent: Friday, May 05, 2017 1:41 PM
>>>>     To: teas@ietf.org
>>>>     Subject: RE: [Teas] I-D Action:
>>>> draft-ietf-teas-actn-framework-05.txt
>>>>
>>>>     Hi,
>>>>
>>>>     This update is intended to incorporate the comments from the last WG
>>>>     meeting and any pending issues. We also have taken the global editorial
>>>>     changes to make it consistent through the document. Major changes are:
>>>>
>>>>     - Inclusion of "network slicing" definition from ACTN perspective (in the
>>>>     terminology section)
>>>>     - Added virtual network service (VNS) section (Section 3) to define types
>>>>     of VNS.
>>>>     - Incorporated "orchestration" (service/network) mapping to ACTN
>>>>     architecture (See Section 5.2)
>>>>     - Created a new section 6 (Topology Abstraction Method) where we imported
>>>>     some texts from ACTN abstraction method
>>>>     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>>>>     - Added Appendices A & B to discuss example deployment scenarios such as
>>>>     example of MDSC and PNC functions integrated in Service/Network
>>>>     Orchestrator (Appendix A) and example of IP + Optical network with L3VPN
>>>>     service (Appendix B)
>>>>
>>>>     In regard to ACTN abstraction method draft, we are going to keep it as a
>>>>     separate draft and use this document to elaborate other aspects not
>>>>     imported to the framework document.
>>>>
>>>>     The following diff pointer will help you see the changes with this revision:
>>>>
>>>> https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>>>>
>>>>     The co-authors believe that the document is ready for WG LC. Any
>>>>     changes/comments will be appreciated.
>>>>
>>>>     Thanks & Best regards,
>>>>     Young & Daniele (on behalf of other co-authors/contributors)
>>>>
>>>>     -----Original Message-----
>>>>     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-drafts@ietf.org
>>>>     Sent: Friday, May 05, 2017 10:41 AM
>>>>     To: i-d-announce@ietf.org
>>>>     Cc: teas@ietf.org
>>>>     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>>>>
>>>>
>>>>     A New Internet-Draft is available from the on-line Internet-Drafts directories.
>>>>     This draft is a work item of the Traffic Engineering Architecture and
>>>>     Signaling of the IETF.
>>>>
>>>>             Title           : Framework for Abstraction and Control of Traffic
>>>>             Engineered Networks
>>>>             Authors         : Daniele Ceccarelli
>>>>                               Young Lee
>>>>     	Filename        : draft-ietf-teas-actn-framework-05.txt
>>>>     	Pages           : 41
>>>>     	Date            : 2017-05-05
>>>>
>>>>     Abstract:
>>>>        Traffic Engineered networks have a variety of mechanisms to
>>>>        facilitate the separation of the data plane and control plane. They
>>>>        also have a range of management and provisioning protocols to
>>>>        configure and activate network resources.  These mechanisms
>>>>        represent key technologies for enabling flexible and dynamic
>>>>        networking.
>>>>
>>>>        Abstraction of network resources is a technique that can be applied
>>>>        to a single network domain or across multiple domains to create a
>>>>        single virtualized network that is under the control of a network
>>>>        operator or the customer of the operator that actually owns
>>>>        the network resources.
>>>>
>>>>        This document provides a framework for Abstraction and Control of
>>>>        Traffic Engineered Networks (ACTN).
>>>>
>>>>
>>>>
>>>>     The IETF datatracker status page for this draft is:
>>>>     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>>>>
>>>>     There are also htmlized versions available at:
>>>>     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>>>>
>>>> https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
>>>> 5
>>>>
>>>>     A diff from the previous version is available at:
>>>>
>>>> https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>>>>
>>>>
>>>>     Please note that it may take a couple of minutes from the time of
>>>>     submission until the htmlized version and diff are available at tools.ietf.org.
>>>>
>>>>     Internet-Drafts are also available by anonymous FTP at:
>>>>     ftp://ftp.ietf.org/internet-drafts/
>>>>
>>>>     _______________________________________________
>>>>     Teas mailing list
>>>>     Teas@ietf.org
>>>>     https://www.ietf.org/mailman/listinfo/teas
>>>>
>>>>     _______________________________________________
>>>>     Teas mailing list
>>>>     Teas@ietf.org
>>>>     https://www.ietf.org/mailman/listinfo/teas
>>>>
>>>>
>>>> _______________________________________________
>>>> Teas mailing list
>>>> Teas@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/teas
>>>>
>>>> _______________________________________________
>>>> Teas mailing list
>>>> Teas@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/teas
>>>>
>>>> _______________________________________________
>>>> Teas mailing list
>>>> Teas@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/teas
>>>>
>>>
>>>              _______________________________________________
>>>              Teas mailing list
>>>              Teas@ietf.org
>>>              https://www.ietf.org/mailman/listinfo/teas
>>>
>>>              _______________________________________________
>>>              Teas mailing list
>>>              Teas@ietf.org
>>>              https://www.ietf.org/mailman/listinfo/teas
>>>
>>>              _______________________________________________
>>>              Netslices mailing list
>>>              Netslices@ietf.org
>>>              https://www.ietf.org/mailman/listinfo/netslices
>>>              _______________________________________________
>>>              Teas mailing list
>>>              Teas@ietf.org
>>>              https://www.ietf.org/mailman/listinfo/teas
>>>
>>>
>>>
>>>          _______________________________________________
>>>          Netslices mailing list
>>>          Netslices@ietf.org
>>>          https://www.ietf.org/mailman/listinfo/netslices
>>>
>>>          _______________________________________________
>>>          Teas mailing list
>>>          Teas@ietf.org
>>>          https://www.ietf.org/mailman/listinfo/teas
>>>
>>>
>>>      _______________________________________________
>>>      Teas mailing list
>>>      Teas@ietf.org
>>>      https://www.ietf.org/mailman/listinfo/teas
>>>
>>>
>>> _______________________________________________
>>> Netslices mailing list
>>> Netslices@ietf.org
>>> https://www.ietf.org/mailman/listinfo/netslices
>>>
>>> _______________________________________________
>>> Netslices mailing list
>>> Netslices@ietf.org
>>> https://www.ietf.org/mailman/listinfo/netslices
>>     _______________________________________________
>>     Netslices mailing list
>>     Netslices@ietf.org
>>     https://www.ietf.org/mailman/listinfo/netslices
>>
>>
>> _______________________________________________
>> Netslices mailing list
>> Netslices@ietf.org
>> https://www.ietf.org/mailman/listinfo/netslices
>


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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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	I am still having difficulty understanding just what this group =
is trying to accomplish.=20
The best I can figure from these discussions has been a definition that =
a slice is
an overlay of some sort, which as we all know, has been defined well in =
a number of
forms, for a number of years.

	=E2=80=94Tom


> On May 30, 2017:9:54 AM, at 9:54 AM, Gert Grammel =
<ggrammel@juniper.net> wrote:
>=20
> Anton,
>=20
> We are in agreement that the 3GPP definition is too high level. It is =
useful however that it stays away from a few arguments that frequently =
come up in our discussion:
> - It doesn't say end-to-end =E2=80=93 hence no need to define "The =
End"
> - It doesn't require "dedicated" resources, hence no need to define =
levels of dedication
> - It doesn't use the term "layer", hence no need to define what a =
Layer would mean=20
> - It doesn't use "owner" to express a technical relation
>=20
> I am all for adding meat to above definition but at the same time =
reluctant to fall back using controversial terminology.
>=20
> Gert
>=20
>=20
>=20
>=20
>=20
> On 2017-05-30, 14:39, "Netslices on behalf of Anton Ivanov" =
<netslices-bounces@ietf.org on behalf of anton.ivanov@kot-begemot.co.uk> =
wrote:
>=20
>=20
>=20
>  On 30/05/17 12:44, sebastian wrote:
>> Hello, Gert,
>>=20
>> Good points.
>>=20
>> There are various instantiations of a 'network slice' that are =
likely, based on a diverse array of usage scenarios.
>> These diverse instantiations of a 'network slice', with a =
corresponding allocation of the required logical or physical resources, =
should be allowed to suit different usage scenarios that may range from =
a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
>>=20
>> Hence a generalized definition for the instantiation of a 'network =
slice' such as the one referred to below (3GPP) is reasonable:
>>   "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."
>=20
>  That is excellent. And too broad. That can be anything from =
connection=20
>  between two computers and a whole provider network. They both fit =
this=20
>  rather elastic definition.
>=20
>  So, in order for this to be discussed at IETF at all we should limit =
the=20
>  scope a little bit to one or more subject areas worked on at IETF:
>=20
>  1. Layer 3 and higher protocols.
>  2. Models describing network abstractions
>  3. Interoperability with other IETF efforts.
>=20
>  Otherwise, both the definition and the discussion should stay at =
3GPP.=20
>  They are good at discussing schemes of world domination, though from =
a=20
>  point of view of network technology the results are quite often fit =
for=20
>  Mr Bean, instead of Mr Blofeld (as intended).
>=20
>  A.
>=20
>>=20
>> Many thanks.
>> -Sebastian
>>=20
>> -----Original Message-----
>> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert =
Grammel
>> Sent: Tuesday, May 30, 2017 6:17 AM
>> To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; =
teas@ietf.org
>> Cc: NetSlices@ietf.org
>> Subject: Re: [Netslices] [Teas] terminology discussion network =
slicing
>>=20
>> Hi Daniele,
>>=20
>> See below for more details:
>>=20
>> On 2017-05-30, 10:17, "Daniele Ceccarelli" =
<daniele.ceccarelli@ericsson.com> wrote:
>>=20
>>   Ciao Gert,
>>=20
>>   Please see in line
>>   Cheers
>>   Daniele
>>=20
>>=20
>>   -----Original Message-----
>>   From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>>   Sent: luned=C3=AC 29 maggio 2017 15:34
>>   To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; =
sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; =
'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' =
<qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>>   Cc: NetSlices@ietf.org
>>   Subject: Re: [Teas] [Netslices] terminology discussion network =
slicing
>>=20
>>   Daniele,
>>=20
>>   Trying to summarize what you're saying: a Network slice is an =
overlay network with minimum service guarantees, including virtual =
network functions available in this overlay network.
>>   [>DC] why do you speak about an overlay network? If for example you =
have a site connected with a lambda to a data center and there you have =
a number of VNF, that's IMO a slice but there is no overlay. I'd say =
that there could be an overlay but that's not mandatory.
>> GGR> A Lambda travels through a WDM which is a Multiplexer (see =
discussion below). So a lambda is in my view an overlay, the multiplexed =
signal (OMS) being the underlay.
>>=20
>>=20
>>=20
>>   In your text I have issues with "dedicated to a given customer". =
Whether such construct is dedicated to one or shared among several legal =
customers shouldn't be of concern for the definition of a Network Slice.
>>   [>DC] Correct, it should be possible to have it dedicated or =
shared. We just need to make sure that both options are supported.
>> GGR>> So if it can either be dedicated or shared, why mentioning this =
at all? Is there anything else?
>>=20
>>   On similar terms, whether a resource (being a NF or transport =
capacity) is shared or not is a design choice rather than a definition. =
In particular, Multiplexer by definition share some sort of common =
capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the =
nature of multiplexing technique shouldn't be a definition criteria for =
a Network Slice either.
>>=20
>>   Another food for thought:
>>   - I would also add that a network slice may use it's own internal =
addressing scheme isolated from other slices. While this is optional, I =
would expect it to be used quite often.
>>   [>DC] agree. Ala VPN.
>>=20
>>   - Why is it necessary to dedicate resources to a "Network Slice" at =
all? If e.g. a firewall NFV is in the DC and communicates over the =
Internet with a CPE (both belonging to a single owner) it would not =
fulfil the criteria of dedicated resource (Internet after all isn't =
dedicated), but it still looks pretty much like a "network slice".
>>=20
>>   [>DC] Think of remote surgery...wouldn't you want every single part =
of the end to end network from the doctor's hands to the scalpel being =
totally dedicated? :) ...and in that case I don't think the packets =
would go through the internet
>> GGR>> There are a few issues here:
>> 1)	this example looks a bit out-dated to me. There is only a =
one-to-one relationship between doctor and patient. This is what I would =
call a classical client-server model with protected resources. Ask for =
SONET leased line circuits if this is what a "slice" would mean. In =
defining what constitutes a slice you would also have to think about =
what constitutes a "doctor-slice" and what would be a "patient-slice"? =
(assuming responsible health care to avoid sarcastic interpretation)
>> 2)	The question asked in my earlier email is whether the packets =
*must* go through a dedicated resource to call the thing "slice". In =
other words, if a thing that uses a non-dedicated "underlay" resource =
like the Internet can be called "slice" too? It is puzzling to me why =
the definition of "slice" would need any dedicated resource at all. It =
is in the end an implementers choice how much dedicated equipment is =
needed to provide a service. So why a slice has to use "dedicated =
resources", and what kind of "dedication" is meant? (See our earlier =
discussion about WDM)? Take your mobile as an example. It supports =
telephony and email. Those are different apps, potentially running in =
different VMs.
>> a.	Is your phone a shared device or a dedicated one?
>> b.	does using different apps means to use a different slices?
>> c.	If you write emails to different recipients, would that qualify =
your email to be "dedicated", hence a different slice, just because they =
are in different address books?
>> d.	If you switch from 3G to VoIP, does it mean to switch the slice, =
even if it is the same app?
>>=20
>> GGR> My thinking is that the definition of "slice" needs to make =
practical sense. The 3GPP definition is probably a bit too high level =
but makes sense to me:
>>   "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."
>>=20
>>   Gert
>>=20
>>   On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" =
<teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> =
wrote:
>>=20
>>       Hi Sebastian, Jeff, Igor, all,
>>=20
>>       I understand Jeff and Igor agree on the fact that a network =
slice does not necessarily include resources in the radio segment/domain =
and in the packet core one.
>>       An example could be an enterprise with dedicated resources in =
the "transport" segment (e.g. VPN, VN and TE-tunnels) that connect the =
customer premises to a data center where a number of VNF (e.g. firewall, =
nat, dpi) is dedicated to that given customer.
>>       My personal opinion is that this should be considered a network =
slice.
>>=20
>>       The definition of network slice should allow for this scenario =
and mostly should clearly state whether this is included or not.
>>=20
>>       Sebastian, I don't understand if your statement:
>>       " The management and orchestration of resources should be =
capable of instantiating a 'network slice' with an e2e (end-to-end) =
scope, where the scope could be between two devices, connected across =
intervening radio networks and core networks that may belong to the same =
or different administrative domains."
>>       implies that there must be a radio and a core segment in order =
to have a slice.
>>=20
>>       BR
>>       Daniele
>>=20
>>=20
>>       -----Original Message-----
>>       From: sebastian [mailto:comscape@gmail.com]
>>       Sent: domenica 28 maggio 2017 07:12
>>       To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' =
<jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele =
Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' =
<leeyoung@huawei.com>; teas@ietf.org
>>       Cc: NetSlices@ietf.org
>>       Subject: RE: [Netslices] [Teas] terminology discussion network =
slicing
>>=20
>>       Hello, Jeff,
>>=20
>>       Agree with your view that the scope (core and/or radio layer) =
of a 'network slice' could vary depending on the triggers for =
instantiating the 'network slice'.
>>=20
>>       On the other hand the instantiation of a 'network slice' may =
also be e2e (end-to-end), such as in device roaming scenarios, or in the =
case of vertical services that span different service providers.
>>=20
>>       The span of a 'network slice' is only limited by the =
availability of resources and appropriate policies (e.g. SLAs), =
independent of whether those resources are in the core network layer or =
in the radio network layer.
>>=20
>>       The management and orchestration of resources should be capable =
of instantiating a 'network slice' with an e2e (end-to-end) scope, where =
the scope could be between two devices, connected across intervening =
radio networks and core networks that may belong to the same or =
different administrative domains.
>>=20
>>       Many thanks.
>>       -Sebastian
>>=20
>>=20
>>       -----Original Message-----
>>       From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf =
Of Igor Bryskin
>>       Sent: Wednesday, May 24, 2017 7:56 AM
>>       To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) =
<qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org
>>       Cc: NetSlices@ietf.org
>>       Subject: Re: [Netslices] [Teas] terminology discussion network =
slicing
>>=20
>>       Thanks Jeff,
>>=20
>>       I am glad we are in sync.
>>=20
>>       Igor
>>=20
>>       -----Original Message-----
>>       From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
>>       Sent: Wednesday, May 24, 2017 8:45 AM
>>       To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>>       Cc: NetSlices@ietf.org
>>       Subject: Re: [Teas] terminology discussion network slicing
>>=20
>>       +1 Igor
>>=20
>>       =46rom transport side (L0-L3) we need to expose set of API=E2=80=99=
s that would allow to request a set of resources (a slice) either =
virtualized of physical that meet the constrains as requested by the =
business logic. Radio, while would definitely be one of most important =
use cases, would not be exclusively for radio use only. Any network =
management/ orchestration layer ideally should be able to use same set =
of API=E2=80=99s to request an e2e service.
>>=20
>>       Cheers,
>>       Jeff
>>=20
>>=20
>>       On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" =
<teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
>>=20
>>           Hi Cristina,
>>=20
>>           I didn=E2=80=99t say that ns has nothing to do with radio. =
I said that ns *may* have nothing to do with radio, i.e. may =
support/enable network architectures that do not involve radio =
necessarily.
>>=20
>>           Igor
>>=20
>>           -----Original Message-----
>>           From: qiangli (D)
>>           Sent: Wednesday, May 24, 2017 5:05 AM
>>           To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>>           Cc: NetSlices@ietf.org
>>           Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion =
network slicing
>>=20
>>           Hi Igor,
>>=20
>>           I share the same opinion on 5G and network slicing, but =
can't see the relation between this opinion and your conclusion that ns =
has nothing to do with radio.
>>=20
>>           Best regards,
>>=20
>>           Cristina QIANG
>>=20
>>=20
>>           -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
>>           =E5=8F=91=E4=BB=B6=E4=BA=BA: Igor Bryskin
>>           =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2017=E5=B9=B45=E6=9C=88=
20=E6=97=A5 23:50
>>           =E6=94=B6=E4=BB=B6=E4=BA=BA: qiangli (D); Daniele =
Ceccarelli; Leeyoung; teas@ietf.org
>>           =E6=8A=84=E9=80=81: NetSlices@ietf.org
>>           =E4=B8=BB=E9=A2=98: RE: [Teas] terminology discussion =
network slicing
>>=20
>>           Hi Cristina,
>>=20
>>           People whose opinion I respect very much told me that even =
the 3GPP network slicing definition and effort is not 5G specific.  =
Network slicing is viewed as an important capability of 5G, but it could =
serve other architectures.
>>=20
>>           Cheers,
>>           Igor
>>=20
>>           -----Original Message-----
>>           From: qiangli (D)
>>           Sent: Saturday, May 20, 2017 5:27 AM
>>           To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>>           Cc: NetSlices@ietf.org
>>           Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology discussion =
network slicing
>>=20
>>           Hi Igor,
>>=20
>>           I have different opinion on " Network slicing may have =
nothing to do with radio".
>>           IMO, network slicing should be a resource-oriented =
management mode. The end-to-end network slice (from UE to server/other =
UE) of course involves the radio resource, usually we use the word =
"RAN-radio access network" rather than simply say "radio". The Frequency =
band, time, code, equipment/site, and software are a number of =
dimensions, in which RAN resources can be isolated [Online available =
http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-ser=
vice-guaranteed-network-slicing-whitepaper].
>>=20
>>           Best regards,
>>=20
>>           Qiang, Li (Cristina)
>>           NetLab, Huawei
>>=20
>>=20
>>           -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
>>           =E5=8F=91=E4=BB=B6=E4=BA=BA: Netslices =
[mailto:netslices-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Igor Bryskin
>>           =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2017=E5=B9=B45=E6=9C=88=
20=E6=97=A5 6:12
>>           =E6=94=B6=E4=BB=B6=E4=BA=BA: Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>>           =E6=8A=84=E9=80=81: NetSlices@ietf.org
>>           =E4=B8=BB=E9=A2=98: Re: [Netslices] [Teas] terminology =
discussion network slicing
>>=20
>>           Hi Danielle,
>>=20
>>           Network slicing may have nothing to do with radio. 5g is =
just a big reason as to why the interest/focus is back on network =
slicing, which is a very old concept. I don't think that anyone is =
arguing with what you wrote. The questions are:
>>           a) how do you manage these "pieces"?
>>           b) what policy infrastructure should be put in place?
>>           c) how do you ensure their separation or, conversely, the =
degree of resource sharing?
>>           d) why exactly legacy VPNs are not good enough?
>>=20
>>           Cheers,
>>           Igor
>>=20
>>=20
>>=20
>>=20
>>           -----Original Message-----
>>           From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Daniele Ceccarelli
>>           Sent: Friday, May 19, 2017 4:19 PM
>>           To: Leeyoung; teas@ietf.org
>>           Cc: NetSlices@ietf.org
>>           Subject: Re: [Teas] terminology discussion network slicing
>>=20
>>           Hi Young, all,
>>=20
>>           i agree with your conclusion but would like to clarify one =
thing that IMO got lost in the discussion since its beginning.
>>=20
>>           The 3GPP definition says:
>>           "A set of network functions and the resources for these =
network functions which are arranged and configured, forming a complete =
logical network to meet certain network characteristics."
>>=20
>>           This means that a network slice IS NOT a VPN or a TE =
Tunnel.
>>           A network slice is "something" (netslices and 3GPP will =
define what this something is) that is composed by a "piece" in the =
RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT =
domain, plus possible other pieces in possible other domains.
>>=20
>>           The word "transport" can be misleading here since one could =
think of transport technologies (e.g. WDM, OTN), but what I'm referring =
to as TRANSPORT DOMAIN is that part of the network that is used to carry =
a packet between two other domains.
>>           In order to have a slice, that portion of the transport =
domain needs to be engineered, hence it is all about building a TE =
entity and stitching services to such entity. This is what is in the =
ACTN scope.
>>=20
>>           My very personal opinion is that whatever belongs to the =
transport domain belongs to IETF (and is already being addressed), while =
the rest is a dangerous duplication of concepts standardized is other =
SDOs...but this is another discussion that doesn't fit here.
>>=20
>>           BR
>>           Daniele
>>=20
>>=20
>>           -----Original Message-----
>>           From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Leeyoung
>>           Sent: venerd=C3=AC 19 maggio 2017 15:15
>>           To: teas@ietf.org
>>           Cc: NetSlices@ietf.org
>>           Subject: Re: [Teas] terminology discussion network slicing
>>=20
>>           Hi,
>>=20
>>           Lou is right. There is a dedicated email list for the =
discussion of "network slicing (cc'ed)" and the discussion about what =
that term means should be held on that list.
>>=20
>>           We have used similar language in =
draft-ietf-teas-actn-framework right from the
>>           00 version. Recent changes have been an attempt to clarify =
what the terminology means in the context of ACTN. We are not trying to =
define or redefine "network slicing" in the ACTN document, but are =
trying to make it clear how ACTN works.
>>=20
>>           Therefore I propose the following resolution:
>>=20
>>           1. All discussion of the general applicability and =
definition of "network slicing" is held on the netslices mailing list.
>>=20
>>           2. We adopt Adrian's suggestion to explain that the scope =
of the definition of the terms used in the ACTN framework is limited to =
ACTN. That means effectively that if there are components of a wider =
definition of network slicing that are not supported by ACTN, that will =
be OK.
>>=20
>>           I propose to post an updated version in the next few days =
and I believe that will allow this draft to move ahead without being =
blocked by the discussion in netslices. Once the IETF has a stable =
definition of network slicing we can return and see how ACTN is =
applicable to that definition an whether more wok is need (in a separate =
draft).
>>=20
>>           Thanks,
>>           Young
>>=20
>>           -----Original Message-----
>>           From: Lou Berger [mailto:lberger@labn.net]
>>           Sent: Tuesday, May 16, 2017 8:35 AM
>>           To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio =
(Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel =
<ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
>>           Subject: Re: [Teas] terminology discussion network slicing
>>=20
>>           Perhaps it's time to bring the discussion to the slicing =
list and report back their reaponse....
>>=20
>>           Lou
>>=20
>>=20
>>           On May 16, 2017 8:31:19 AM Igor Bryskin =
<Igor.Bryskin@huawei.com> wrote:
>>=20
>>> Hi Sergio,
>>>=20
>>> I would also like to hear more from network slicing experts.
>>>=20
>>> My understanding is that the difference in the separation (in terms =
of
>>> control and data planes, security, etc.). For example, traditional =
BGP
>>> based L3 VPNs (that use provider's common control plane for their
>>> management and IP/MPLS TE tunnels to inter-connect their PEs) will
>>> probably not be able guarantee for the clients msec range =
connectivity
>>> setup times required by 5g, while provided by the same provider =
fully
>>> separated/genuinely private IP/MPLS networks (that do not share
>>> IP/MPLS control plane and infrastructure, whose network topology is
>>> supported by separate L0/L1 connections) hopefully will be able to
>>> provide such guarantees. Therefore, I define layer network slices as
>>> dynamically managed fully isolated in control and data planes =
private
>>> TE layer networks, which may share one or more underlying server =
layer networks.
>>>=20
>>>=20
>>> Cheers,
>>> Igor
>>>=20
>>>=20
>>>=20
>>>=20
>>> -----Original Message-----
>>> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, =
Sergio
>>> (Nokia - IT/Vimercate)
>>> Sent: Tuesday, May 16, 2017 6:08 AM
>>> To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
>>> Subject: Re: [Teas] terminology discussion network slicing
>>>=20
>>> Hi Gert,
>>>=20
>>> "Thinking a bit about it I came to the point where "VPN" and =
"network
>>> slices" seem to describe the same entity or at least a "network =
slice"
>>> being a VPN of VPNs?"
>>>=20
>>> I share completely your conclusion , I'd like if someone can explain
>>> if a difference really exists .
>>>=20
>>> Thanks
>>> Sergio
>>>=20
>>>=20
>>> -----Original Message-----
>>> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>>> Sent: Monday, May 15, 2017 7:02 PM
>>> To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
>>> Subject: Re: [Teas] terminology discussion network slicing
>>>=20
>>> Leeyoung,
>>>=20
>>> Thank you for taking a stab on this. Usually when getting to a
>>> definition, I try to establish what kind of existing constructs =
would
>>> fall under the definition. If my understanding is correct, the
>>> following list of constructs would all satisfy the definition =
somehow.
>>> - A TDM network with a p2p TDM connection
>>> - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
>>> - An MPLS LSP using a traffic engineered IP network
>>> - A L2VPN using a traffic engineered MPLS network
>>> - A L3VPN using a traffic engineered IP network
>>> - A TCP connection using a traffic engineered IP network
>>> - Different QoS classes in an IP network
>>>=20
>>> Thinking a bit about it I came to the point where "VPN" and "network
>>> slices" seem to describe the same entity or at least a "network =
slice"
>>> being a VPN of VPNs?
>>>=20
>>> Gert
>>>=20
>>>=20
>>> On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
>>> <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>>>=20
>>>  Hi Adrian and others,
>>>=20
>>>  We'd like cross check with you on some terminology we introduced =
newly. Any
>>>  comment on these terms will be greatly appreciated.
>>>=20
>>>  We introduced 'network slicing' as follows:
>>>=20
>>>          Network slicing is a collection of resources
>>>          that are used to establish logically dedicated virtual =
networks
>>>          over TE networks. It allows a network provider to provide
>>>          dedicated virtual networks for application/customer over a
>>>          common network infrastructure. The logically dedicated
>>>          resources are a part of the larger common network
>>>          infrastructures that are shared among various network slice
>>>          instances which are the end-to-end realization of network
>>>          slicing, consisting of the combination of physically or
>>>          logically dedicated resources.
>>>=20
>>>=20
>>>  Thanks.
>>>  Young and Daniele
>>>  -----Original Message-----
>>>  From: Leeyoung
>>>  Sent: Friday, May 05, 2017 1:41 PM
>>>  To: teas@ietf.org
>>>  Subject: RE: [Teas] I-D Action:
>>> draft-ietf-teas-actn-framework-05.txt
>>>=20
>>>  Hi,
>>>=20
>>>  This update is intended to incorporate the comments from the last =
WG
>>>  meeting and any pending issues. We also have taken the global =
editorial
>>>  changes to make it consistent through the document. Major changes =
are:
>>>=20
>>>  - Inclusion of "network slicing" definition from ACTN perspective =
(in the
>>>  terminology section)
>>>  - Added virtual network service (VNS) section (Section 3) to define =
types
>>>  of VNS.
>>>  - Incorporated "orchestration" (service/network) mapping to ACTN
>>>  architecture (See Section 5.2)
>>>  - Created a new section 6 (Topology Abstraction Method) where we =
imported
>>>  some texts from ACTN abstraction method
>>>  https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>>>  - Added Appendices A & B to discuss example deployment scenarios =
such as
>>>  example of MDSC and PNC functions integrated in Service/Network
>>>  Orchestrator (Appendix A) and example of IP + Optical network with =
L3VPN
>>>  service (Appendix B)
>>>=20
>>>  In regard to ACTN abstraction method draft, we are going to keep it =
as a
>>>  separate draft and use this document to elaborate other aspects not
>>>  imported to the framework document.
>>>=20
>>>  The following diff pointer will help you see the changes with this =
revision:
>>>=20
>>> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>>>=20
>>>  The co-authors believe that the document is ready for WG LC. Any
>>>  changes/comments will be appreciated.
>>>=20
>>>  Thanks & Best regards,
>>>  Young & Daniele (on behalf of other co-authors/contributors)
>>>=20
>>>  -----Original Message-----
>>>  From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
internet-drafts@ietf.org
>>>  Sent: Friday, May 05, 2017 10:41 AM
>>>  To: i-d-announce@ietf.org
>>>  Cc: teas@ietf.org
>>>  Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>>>=20
>>>=20
>>>  A New Internet-Draft is available from the on-line Internet-Drafts =
directories.
>>>  This draft is a work item of the Traffic Engineering Architecture =
and
>>>  Signaling of the IETF.
>>>=20
>>>          Title           : Framework for Abstraction and Control of =
Traffic
>>>          Engineered Networks
>>>          Authors         : Daniele Ceccarelli
>>>                            Young Lee
>>>  	Filename        : draft-ietf-teas-actn-framework-05.txt
>>>  	Pages           : 41
>>>  	Date            : 2017-05-05
>>>=20
>>>  Abstract:
>>>     Traffic Engineered networks have a variety of mechanisms to
>>>     facilitate the separation of the data plane and control plane. =
They
>>>     also have a range of management and provisioning protocols to
>>>     configure and activate network resources.  These mechanisms
>>>     represent key technologies for enabling flexible and dynamic
>>>     networking.
>>>=20
>>>     Abstraction of network resources is a technique that can be =
applied
>>>     to a single network domain or across multiple domains to create =
a
>>>     single virtualized network that is under the control of a =
network
>>>     operator or the customer of the operator that actually owns
>>>     the network resources.
>>>=20
>>>     This document provides a framework for Abstraction and Control =
of
>>>     Traffic Engineered Networks (ACTN).
>>>=20
>>>=20
>>>=20
>>>  The IETF datatracker status page for this draft is:
>>>  https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>>>=20
>>>  There are also htmlized versions available at:
>>>  https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>>>=20
>>> =
https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
>>> 5
>>>=20
>>>  A diff from the previous version is available at:
>>>=20
>>> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>>>=20
>>>=20
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To: Igor Bryskin <Igor.Bryskin@huawei.com>, Anton Ivanov <anton.ivanov@kot-begemot.co.uk>, "netslices@ietf.org" <netslices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Reply-To: <sebastian.thalanany@ieee.org>
From: "sebastian" <comscape@gmail.com>
To: "'Igor Bryskin'" <Igor.Bryskin@huawei.com>, "'Gert Grammel'" <ggrammel@juniper.net>, "'Anton Ivanov'" <anton.ivanov@kot-begemot.co.uk>, <netslices@ietf.org>
References: <7AEB3D6833318045B4AE71C2C87E8E172B2CA60E@SJCEML702-CHM.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD0078639099515B3@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB49B9@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD007863909953AFA@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB520C@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD0078639099662D6@SJCEML702-CHM.china.huawei.com> <4B13E4DA-DB18-4454-AFC4-57A8B1264CE1@gmail.com> <0C72C38E7EBC34499E8A9E7DD00786390996673B@SJCEML702-CHM.china.huawei.com> <AM2PR07MB09948AF604E3C7869296AEDCF0F30@AM2PR07MB0994.eurprd07.prod.outlook.com> <7625E93C-8E51-4B2F-B28C-FB2A5287FD99@juniper.net> <VI1PR07MB1005262C6FC0CC75EF9D3AA1F0F00@VI1PR07MB1005.eurprd07.prod.outlook.com> <AB42001E-4A0E-4019-A373-D46BAB1ECB78@juniper.net> <001f01d2d93a$0ab65de0$202319a0$@gmail.com> <aadfe32c-b079-8427-a738-dc5ef9e45703@kot-begemot.co.uk> <1A3ED087-9AE3-48C5-B135-D09B0F34AB75@juniper.net> <0C72C38E7EBC3449 9E8A9E7DD007863909976E50@SJCEML702-CHM.china.huawei.com>
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Date: Tue, 30 May 2017 12:17:21 -0500
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Hello, Igor, Gert,

The high-level definition of a 'network slice' in 3GPP should serve as a =
context and background that is not violated, while drilling down into =
the details of the required suite of protocols and procedures (IETF), =
across the different layers of the stack.

Support for the e2e(end-to-end) aspect of a 'network slice' is important =
to support the usage scenarios that underscore the 5G ecosystem.

Many thanks.
-Sebastian

-----Original Message-----
From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor =
Bryskin
Sent: Tuesday, May 30, 2017 9:21 AM
To: Gert Grammel <ggrammel@juniper.net>; Anton Ivanov =
<anton.ivanov@kot-begemot.co.uk>; netslices@ietf.org
Subject: Re: [Netslices] [Teas] terminology discussion network slicing

Gert,

You seem to like the 3gpp network slice definition for all things it =
didn=E2=80=99t say anything about. It is a hack of a praise for a =
definition! :=3D)

But in order to work on network slicing in IETF we need some =
(reasonably) tight definitions to see how we can actually help.
So, when Anton enlists things like:
"
    1. Layer 3 and higher protocols.
    2. Models describing network abstractions "
I find it positive, helpful and constructive.

Cheers,
Igor


-----Original Message-----
From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert =
Grammel
Sent: Tuesday, May 30, 2017 9:54 AM
To: Anton Ivanov; netslices@ietf.org
Subject: Re: [Netslices] [Teas] terminology discussion network slicing

Anton,

We are in agreement that the 3GPP definition is too high level. It is =
useful however that it stays away from a few arguments that frequently =
come up in our discussion:
- It doesn't say end-to-end =E2=80=93 hence no need to define "The End"
- It doesn't require "dedicated" resources, hence no need to define =
levels of dedication
- It doesn't use the term "layer", hence no need to define what a Layer =
would mean
- It doesn't use "owner" to express a technical relation

I am all for adding meat to above definition but at the same time =
reluctant to fall back using controversial terminology.

Gert



 =20

On 2017-05-30, 14:39, "Netslices on behalf of Anton Ivanov" =
<netslices-bounces@ietf.org on behalf of anton.ivanov@kot-begemot.co.uk> =
wrote:

   =20
   =20
    On 30/05/17 12:44, sebastian wrote:
    > Hello, Gert,
    >
    > Good points.
    >
    > There are various instantiations of a 'network slice' that are =
likely, based on a diverse array of usage scenarios.
    > These diverse instantiations of a 'network slice', with a =
corresponding allocation of the required logical or physical resources, =
should be allowed to suit different usage scenarios that may range from =
a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
    >
    > Hence a generalized definition for the instantiation of a 'network =
slice' such as the one referred to below (3GPP) is reasonable:
    >      "A set of network functions and the resources for these =
network functions which are arranged and configured, forming a complete =
logical network to meet certain network characteristics."
   =20
    That is excellent. And too broad. That can be anything from =
connection=20
    between two computers and a whole provider network. They both fit =
this=20
    rather elastic definition.
   =20
    So, in order for this to be discussed at IETF at all we should limit =
the=20
    scope a little bit to one or more subject areas worked on at IETF:
   =20
    1. Layer 3 and higher protocols.
    2. Models describing network abstractions
    3. Interoperability with other IETF efforts.
   =20
    Otherwise, both the definition and the discussion should stay at =
3GPP.=20
    They are good at discussing schemes of world domination, though from =
a=20
    point of view of network technology the results are quite often fit =
for=20
    Mr Bean, instead of Mr Blofeld (as intended).
   =20
    A.
   =20
    >
    > Many thanks.
    > -Sebastian
    >
    > -----Original Message-----
    > From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of =
Gert Grammel
    > Sent: Tuesday, May 30, 2017 6:17 AM
    > To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; =
teas@ietf.org
    > Cc: NetSlices@ietf.org
    > Subject: Re: [Netslices] [Teas] terminology discussion network =
slicing
    >
    > Hi Daniele,
    >
    > See below for more details:
    >
    > On 2017-05-30, 10:17, "Daniele Ceccarelli" =
<daniele.ceccarelli@ericsson.com> wrote:
    >
    >      Ciao Gert,
    >     =20
    >      Please see in line
    >      Cheers
    >      Daniele
    >     =20
    >     =20
    >      -----Original Message-----
    >      From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert =
Grammel
    >      Sent: luned=C3=AC 29 maggio 2017 15:34
    >      To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; =
sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; =
'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' =
<qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
    >      Cc: NetSlices@ietf.org
    >      Subject: Re: [Teas] [Netslices] terminology discussion =
network slicing
    >     =20
    >      Daniele,
    >     =20
    >      Trying to summarize what you're saying: a Network slice is an =
overlay network with minimum service guarantees, including virtual =
network functions available in this overlay network.
    >      [>DC] why do you speak about an overlay network? If for =
example you have a site connected with a lambda to a data center and =
there you have a number of VNF, that's IMO a slice but there is no =
overlay. I'd say that there could be an overlay but that's not =
mandatory.
    > GGR> A Lambda travels through a WDM which is a Multiplexer (see =
discussion below). So a lambda is in my view an overlay, the multiplexed =
signal (OMS) being the underlay.
    >
    >
    >
    >      In your text I have issues with "dedicated to a given =
customer". Whether such construct is dedicated to one or shared among =
several legal customers shouldn't be of concern for the definition of a =
Network Slice.
    >      [>DC] Correct, it should be possible to have it dedicated or =
shared. We just need to make sure that both options are supported.
    > GGR>> So if it can either be dedicated or shared, why mentioning =
this at all? Is there anything else?
    >
    >      On similar terms, whether a resource (being a NF or transport =
capacity) is shared or not is a design choice rather than a definition. =
In particular, Multiplexer by definition share some sort of common =
capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the =
nature of multiplexing technique shouldn't be a definition criteria for =
a Network Slice either.
    >     =20
    >      Another food for thought:
    >      - I would also add that a network slice may use it's own =
internal addressing scheme isolated from other slices. While this is =
optional, I would expect it to be used quite often.
    >      [>DC] agree. Ala VPN.
    >
    >      - Why is it necessary to dedicate resources to a "Network =
Slice" at all? If e.g. a firewall NFV is in the DC and communicates over =
the Internet with a CPE (both belonging to a single owner) it would not =
fulfil the criteria of dedicated resource (Internet after all isn't =
dedicated), but it still looks pretty much like a "network slice".
    >
    >      [>DC] Think of remote surgery...wouldn't you want every =
single part of the end to end network from the doctor's hands to the =
scalpel being totally dedicated? :) ...and in that case I don't think =
the packets would go through the internet
    > GGR>> There are a few issues here:
    > 1)	this example looks a bit out-dated to me. There is only a =
one-to-one relationship between doctor and patient. This is what I would =
call a classical client-server model with protected resources. Ask for =
SONET leased line circuits if this is what a "slice" would mean. In =
defining what constitutes a slice you would also have to think about =
what constitutes a "doctor-slice" and what would be a "patient-slice"? =
(assuming responsible health care to avoid sarcastic interpretation)
    > 2)	The question asked in my earlier email is whether the packets =
*must* go through a dedicated resource to call the thing "slice". In =
other words, if a thing that uses a non-dedicated "underlay" resource =
like the Internet can be called "slice" too? It is puzzling to me why =
the definition of "slice" would need any dedicated resource at all. It =
is in the end an implementers choice how much dedicated equipment is =
needed to provide a service. So why a slice has to use "dedicated =
resources", and what kind of "dedication" is meant? (See our earlier =
discussion about WDM)? Take your mobile as an example. It supports =
telephony and email. Those are different apps, potentially running in =
different VMs.
    > a.	Is your phone a shared device or a dedicated one?
    > b.	does using different apps means to use a different slices?
    > c.	If you write emails to different recipients, would that qualify =
your email to be "dedicated", hence a different slice, just because they =
are in different address books?
    > d.	If you switch from 3G to VoIP, does it mean to switch the =
slice, even if it is the same app?
    >
    > GGR> My thinking is that the definition of "slice" needs to make =
practical sense. The 3GPP definition is probably a bit too high level =
but makes sense to me:
    >      "A set of network functions and the resources for these =
network functions which are arranged and configured, forming a complete =
logical network to meet certain network characteristics."
    >
    >      Gert
    >     =20
    >      On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" =
<teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> =
wrote:
    >     =20
    >          Hi Sebastian, Jeff, Igor, all,
    >         =20
    >          I understand Jeff and Igor agree on the fact that a =
network slice does not necessarily include resources in the radio =
segment/domain and in the packet core one.
    >          An example could be an enterprise with dedicated =
resources in the "transport" segment (e.g. VPN, VN and TE-tunnels) that =
connect the customer premises to a data center where a number of VNF =
(e.g. firewall, nat, dpi) is dedicated to that given customer.
    >          My personal opinion is that this should be considered a =
network slice.
    >         =20
    >          The definition of network slice should allow for this =
scenario and mostly should clearly state whether this is included or =
not.
    >         =20
    >          Sebastian, I don't understand if your statement:
    >          " The management and orchestration of resources should be =
capable of instantiating a 'network slice' with an e2e (end-to-end) =
scope, where the scope could be between two devices, connected across =
intervening radio networks and core networks that may belong to the same =
or different administrative domains."
    >          implies that there must be a radio and a core segment in =
order to have a slice.
    >         =20
    >          BR
    >          Daniele
    >         =20
    >         =20
    >          -----Original Message-----
    >          From: sebastian [mailto:comscape@gmail.com]
    >          Sent: domenica 28 maggio 2017 07:12
    >          To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff =
Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' =
<qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; 'Leeyoung' <leeyoung@huawei.com>; =
teas@ietf.org
    >          Cc: NetSlices@ietf.org
    >          Subject: RE: [Netslices] [Teas] terminology discussion =
network slicing
    >         =20
    >          Hello, Jeff,
    >         =20
    >          Agree with your view that the scope (core and/or radio =
layer) of a 'network slice' could vary depending on the triggers for =
instantiating the 'network slice'.
    >         =20
    >          On the other hand the instantiation of a 'network slice' =
may also be e2e (end-to-end), such as in device roaming scenarios, or in =
the case of vertical services that span different service providers.
    >         =20
    >          The span of a 'network slice' is only limited by the =
availability of resources and appropriate policies (e.g. SLAs), =
independent of whether those resources are in the core network layer or =
in the radio network layer.
    >         =20
    >          The management and orchestration of resources should be =
capable of instantiating a 'network slice' with an e2e (end-to-end) =
scope, where the scope could be between two devices, connected across =
intervening radio networks and core networks that may belong to the same =
or different administrative domains.
    >         =20
    >          Many thanks.
    >          -Sebastian
    >         =20
    >         =20
    >          -----Original Message-----
    >          From: Netslices [mailto:netslices-bounces@ietf.org] On =
Behalf Of Igor Bryskin
    >          Sent: Wednesday, May 24, 2017 7:56 AM
    >          To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) =
<qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org
    >          Cc: NetSlices@ietf.org
    >          Subject: Re: [Netslices] [Teas] terminology discussion =
network slicing
    >         =20
    >          Thanks Jeff,
    >         =20
    >          I am glad we are in sync.
    >         =20
    >          Igor
    >         =20
    >          -----Original Message-----
    >          From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
    >          Sent: Wednesday, May 24, 2017 8:45 AM
    >          To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; =
Leeyoung; teas@ietf.org
    >          Cc: NetSlices@ietf.org
    >          Subject: Re: [Teas] terminology discussion network =
slicing
    >         =20
    >          +1 Igor
    >         =20
    >          From transport side (L0-L3) we need to expose set of =
API=E2=80=99s that would allow to request a set of resources (a slice) =
either virtualized of physical that meet the constrains as requested by =
the business logic. Radio, while would definitely be one of most =
important use cases, would not be exclusively for radio use only. Any =
network management/ orchestration layer ideally should be able to use =
same set of API=E2=80=99s to request an e2e service.
    >         =20
    >          Cheers,
    >          Jeff
    >          =20
    >         =20
    >          On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" =
<teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
    >         =20
    >              Hi Cristina,
    >             =20
    >              I didn=E2=80=99t say that ns has nothing to do with =
radio. I said that ns *may* have nothing to do with radio, i.e. may =
support/enable network architectures that do not involve radio =
necessarily.
    >             =20
    >              Igor
    >             =20
    >              -----Original Message-----
    >              From: qiangli (D)
    >              Sent: Wednesday, May 24, 2017 5:05 AM
    >              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
    >              Cc: NetSlices@ietf.org
    >              Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology =
discussion network slicing
    >             =20
    >              Hi Igor,
    >             =20
    >              I share the same opinion on 5G and network slicing, =
but can't see the relation between this opinion and your conclusion that =
ns has nothing to do with radio.
    >             =20
    >              Best regards,
    >             =20
    >              Cristina QIANG
    >             =20
    >             =20
    >              -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    >              =E5=8F=91=E4=BB=B6=E4=BA=BA: Igor Bryskin
    >              =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 23:50
    >              =E6=94=B6=E4=BB=B6=E4=BA=BA: qiangli (D); Daniele =
Ceccarelli; Leeyoung; teas@ietf.org
    >              =E6=8A=84=E9=80=81: NetSlices@ietf.org
    >              =E4=B8=BB=E9=A2=98: RE: [Teas] terminology discussion =
network slicing
    >             =20
    >              Hi Cristina,
    >             =20
    >              People whose opinion I respect very much told me that =
even the 3GPP network slicing definition and effort is not 5G specific.  =
Network slicing is viewed as an important capability of 5G, but it could =
serve other architectures.
    >             =20
    >              Cheers,
    >              Igor
    >             =20
    >              -----Original Message-----
    >              From: qiangli (D)
    >              Sent: Saturday, May 20, 2017 5:27 AM
    >              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
    >              Cc: NetSlices@ietf.org
    >              Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology =
discussion network slicing
    >             =20
    >              Hi Igor,
    >             =20
    >              I have different opinion on " Network slicing may =
have nothing to do with radio".
    >              IMO, network slicing should be a resource-oriented =
management mode. The end-to-end network slice (from UE to server/other =
UE) of course involves the radio resource, usually we use the word =
"RAN-radio access network" rather than simply say "radio". The Frequency =
band, time, code, equipment/site, and software are a number of =
dimensions, in which RAN resources can be isolated [Online available =
http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-se=
rvice-guaranteed-network-slicing-whitepaper].
    >             =20
    >              Best regards,
    >             =20
    >              Qiang, Li (Cristina)
    >              NetLab, Huawei
    >             =20
    >             =20
    >              -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    >              =E5=8F=91=E4=BB=B6=E4=BA=BA: Netslices =
[mailto:netslices-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Igor Bryskin
    >              =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 6:12
    >              =E6=94=B6=E4=BB=B6=E4=BA=BA: Daniele Ceccarelli; =
Leeyoung; teas@ietf.org
    >              =E6=8A=84=E9=80=81: NetSlices@ietf.org
    >              =E4=B8=BB=E9=A2=98: Re: [Netslices] [Teas] =
terminology discussion network slicing
    >             =20
    >              Hi Danielle,
    >             =20
    >              Network slicing may have nothing to do with radio. 5g =
is just a big reason as to why the interest/focus is back on network =
slicing, which is a very old concept. I don't think that anyone is =
arguing with what you wrote. The questions are:
    >              a) how do you manage these "pieces"?
    >              b) what policy infrastructure should be put in place?
    >              c) how do you ensure their separation or, conversely, =
the degree of resource sharing?
    >              d) why exactly legacy VPNs are not good enough?
    >             =20
    >              Cheers,
    >              Igor
    >             =20
    >             =20
    >               =20
    >             =20
    >              -----Original Message-----
    >              From: Teas [mailto:teas-bounces@ietf.org] On Behalf =
Of Daniele Ceccarelli
    >              Sent: Friday, May 19, 2017 4:19 PM
    >              To: Leeyoung; teas@ietf.org
    >              Cc: NetSlices@ietf.org
    >              Subject: Re: [Teas] terminology discussion network =
slicing
    >             =20
    >              Hi Young, all,
    >             =20
    >              i agree with your conclusion but would like to =
clarify one thing that IMO got lost in the discussion since its =
beginning.
    >             =20
    >              The 3GPP definition says:
    >              "A set of network functions and the resources for =
these network functions which are arranged and configured, forming a =
complete logical network to meet certain network characteristics."
    >             =20
    >              This means that a network slice IS NOT a VPN or a TE =
Tunnel.
    >              A network slice is "something" (netslices and 3GPP =
will define what this something is) that is composed by a "piece" in the =
RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT =
domain, plus possible other pieces in possible other domains.
    >             =20
    >              The word "transport" can be misleading here since one =
could think of transport technologies (e.g. WDM, OTN), but what I'm =
referring to as TRANSPORT DOMAIN is that part of the network that is =
used to carry a packet between two other domains.
    >              In order to have a slice, that portion of the =
transport domain needs to be engineered, hence it is all about building =
a TE entity and stitching services to such entity. This is what is in =
the ACTN scope.
    >             =20
    >              My very personal opinion is that whatever belongs to =
the transport domain belongs to IETF (and is already being addressed), =
while the rest is a dangerous duplication of concepts standardized is =
other SDOs...but this is another discussion that doesn't fit here.
    >             =20
    >              BR
    >              Daniele
    >             =20
    >             =20
    >              -----Original Message-----
    >              From: Teas [mailto:teas-bounces@ietf.org] On Behalf =
Of Leeyoung
    >              Sent: venerd=C3=AC 19 maggio 2017 15:15
    >              To: teas@ietf.org
    >              Cc: NetSlices@ietf.org
    >              Subject: Re: [Teas] terminology discussion network =
slicing
    >             =20
    >              Hi,
    >             =20
    >              Lou is right. There is a dedicated email list for the =
discussion of "network slicing (cc'ed)" and the discussion about what =
that term means should be held on that list.
    >             =20
    >              We have used similar language in =
draft-ietf-teas-actn-framework right from the
    >              00 version. Recent changes have been an attempt to =
clarify what the terminology means in the context of ACTN. We are not =
trying to define or redefine "network slicing" in the ACTN document, but =
are trying to make it clear how ACTN works.
    >             =20
    >              Therefore I propose the following resolution:
    >             =20
    >              1. All discussion of the general applicability and =
definition of "network slicing" is held on the netslices mailing list.
    >             =20
    >              2. We adopt Adrian's suggestion to explain that the =
scope of the definition of the terms used in the ACTN framework is =
limited to ACTN. That means effectively that if there are components of =
a wider definition of network slicing that are not supported by ACTN, =
that will be OK.
    >             =20
    >              I propose to post an updated version in the next few =
days and I believe that will allow this draft to move ahead without =
being blocked by the discussion in netslices. Once the IETF has a stable =
definition of network slicing we can return and see how ACTN is =
applicable to that definition an whether more wok is need (in a separate =
draft).
    >             =20
    >              Thanks,
    >              Young
    >             =20
    >              -----Original Message-----
    >              From: Lou Berger [mailto:lberger@labn.net]
    >              Sent: Tuesday, May 16, 2017 8:35 AM
    >              To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, =
Sergio (Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel =
<ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
    >              Subject: Re: [Teas] terminology discussion network =
slicing
    >             =20
    >              Perhaps it's time to bring the discussion to the =
slicing list and report back their reaponse....
    >             =20
    >              Lou
    >             =20
    >             =20
    >              On May 16, 2017 8:31:19 AM Igor Bryskin =
<Igor.Bryskin@huawei.com> wrote:
    >             =20
    >              > Hi Sergio,
    >              >
    >              > I would also like to hear more from network slicing =
experts.
    >              >
    >              > My understanding is that the difference in the =
separation (in terms of
    >              > control and data planes, security, etc.). For =
example, traditional BGP
    >              > based L3 VPNs (that use provider's common control =
plane for their
    >              > management and IP/MPLS TE tunnels to inter-connect =
their PEs) will
    >              > probably not be able guarantee for the clients msec =
range connectivity
    >              > setup times required by 5g, while provided by the =
same provider fully
    >              > separated/genuinely private IP/MPLS networks (that =
do not share
    >              > IP/MPLS control plane and infrastructure, whose =
network topology is
    >              > supported by separate L0/L1 connections) hopefully =
will be able to
    >              > provide such guarantees. Therefore, I define layer =
network slices as
    >              > dynamically managed fully isolated in control and =
data planes private
    >              > TE layer networks, which may share one or more =
underlying server layer networks.
    >              >
    >              >
    >              > Cheers,
    >              > Igor
    >              >
    >              >
    >              >
    >              >
    >              > -----Original Message-----
    >              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf =
Of Belotti, Sergio
    >              > (Nokia - IT/Vimercate)
    >              > Sent: Tuesday, May 16, 2017 6:08 AM
    >              > To: Gert Grammel; Leeyoung; teas@ietf.org; =
adrian@olddog.co.uk
    >              > Subject: Re: [Teas] terminology discussion network =
slicing
    >              >
    >              > Hi Gert,
    >              >
    >              > "Thinking a bit about it I came to the point where =
"VPN" and "network
    >              > slices" seem to describe the same entity or at =
least a "network slice"
    >              > being a VPN of VPNs?"
    >              >
    >              > I share completely your conclusion , I'd like if =
someone can explain
    >              > if a difference really exists .
    >              >
    >              > Thanks
    >              > Sergio
    >              >
    >              >
    >              > -----Original Message-----
    >              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf =
Of Gert Grammel
    >              > Sent: Monday, May 15, 2017 7:02 PM
    >              > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
    >              > Subject: Re: [Teas] terminology discussion network =
slicing
    >              >
    >              > Leeyoung,
    >              >
    >              > Thank you for taking a stab on this. Usually when =
getting to a
    >              > definition, I try to establish what kind of =
existing constructs would
    >              > fall under the definition. If my understanding is =
correct, the
    >              > following list of constructs would all satisfy the =
definition somehow.
    >              > - A TDM network with a p2p TDM connection
    >              > - A PSC capable network carrying a p2p circuit =
(such as EPL/EVPL)
    >              > - An MPLS LSP using a traffic engineered IP network
    >              > - A L2VPN using a traffic engineered MPLS network
    >              > - A L3VPN using a traffic engineered IP network
    >              > - A TCP connection using a traffic engineered IP =
network
    >              > - Different QoS classes in an IP network
    >              >
    >              > Thinking a bit about it I came to the point where =
"VPN" and "network
    >              > slices" seem to describe the same entity or at =
least a "network slice"
    >              > being a VPN of VPNs?
    >              >
    >              > Gert
    >              >
    >              >
    >              > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
    >              > <teas-bounces@ietf.org on behalf of =
leeyoung@huawei.com> wrote:
    >              >
    >              >     Hi Adrian and others,
    >              >
    >              >     We'd like cross check with you on some =
terminology we introduced newly. Any
    >              >     comment on these terms will be greatly =
appreciated.
    >              >
    >              >     We introduced 'network slicing' as follows:
    >              >
    >              >             Network slicing is a collection of =
resources
    >              >             that are used to establish logically =
dedicated virtual networks
    >              >             over TE networks. It allows a network =
provider to provide
    >              >             dedicated virtual networks for =
application/customer over a
    >              >             common network infrastructure. The =
logically dedicated
    >              >             resources are a part of the larger =
common network
    >              >             infrastructures that are shared among =
various network slice
    >              >             instances which are the end-to-end =
realization of network
    >              >             slicing, consisting of the combination =
of physically or
    >              >             logically dedicated resources.
    >              >
    >              >
    >              >     Thanks.
    >              >     Young and Daniele
    >              >     -----Original Message-----
    >              >     From: Leeyoung
    >              >     Sent: Friday, May 05, 2017 1:41 PM
    >              >     To: teas@ietf.org
    >              >     Subject: RE: [Teas] I-D Action:
    >              > draft-ietf-teas-actn-framework-05.txt
    >              >
    >              >     Hi,
    >              >
    >              >     This update is intended to incorporate the =
comments from the last WG
    >              >     meeting and any pending issues. We also have =
taken the global editorial
    >              >     changes to make it consistent through the =
document. Major changes are:
    >              >
    >              >     - Inclusion of "network slicing" definition =
from ACTN perspective (in the
    >              >     terminology section)
    >              >     - Added virtual network service (VNS) section =
(Section 3) to define types
    >              >     of VNS.
    >              >     - Incorporated "orchestration" =
(service/network) mapping to ACTN
    >              >     architecture (See Section 5.2)
    >              >     - Created a new section 6 (Topology Abstraction =
Method) where we imported
    >              >     some texts from ACTN abstraction method
    >              >     =
https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
    >              >     - Added Appendices A & B to discuss example =
deployment scenarios such as
    >              >     example of MDSC and PNC functions integrated in =
Service/Network
    >              >     Orchestrator (Appendix A) and example of IP + =
Optical network with L3VPN
    >              >     service (Appendix B)
    >              >
    >              >     In regard to ACTN abstraction method draft, we =
are going to keep it as a
    >              >     separate draft and use this document to =
elaborate other aspects not
    >              >     imported to the framework document.
    >              >
    >              >     The following diff pointer will help you see =
the changes with this revision:
    >              >
    >              > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >              >
    >              >     The co-authors believe that the document is =
ready for WG LC. Any
    >              >     changes/comments will be appreciated.
    >              >
    >              >     Thanks & Best regards,
    >              >     Young & Daniele (on behalf of other =
co-authors/contributors)
    >              >
    >              >     -----Original Message-----
    >              >     From: Teas [mailto:teas-bounces@ietf.org] On =
Behalf Of internet-drafts@ietf.org
    >              >     Sent: Friday, May 05, 2017 10:41 AM
    >              >     To: i-d-announce@ietf.org
    >              >     Cc: teas@ietf.org
    >              >     Subject: [Teas] I-D Action: =
draft-ietf-teas-actn-framework-05.txt
    >              >
    >              >
    >              >     A New Internet-Draft is available from the =
on-line Internet-Drafts directories.
    >              >     This draft is a work item of the Traffic =
Engineering Architecture and
    >              >     Signaling of the IETF.
    >              >
    >              >             Title           : Framework for =
Abstraction and Control of Traffic
    >              >             Engineered Networks
    >              >             Authors         : Daniele Ceccarelli
    >              >                               Young Lee
    >              >     	Filename        : =
draft-ietf-teas-actn-framework-05.txt
    >              >     	Pages           : 41
    >              >     	Date            : 2017-05-05
    >              >
    >              >     Abstract:
    >              >        Traffic Engineered networks have a variety =
of mechanisms to
    >              >        facilitate the separation of the data plane =
and control plane. They
    >              >        also have a range of management and =
provisioning protocols to
    >              >        configure and activate network resources.  =
These mechanisms
    >              >        represent key technologies for enabling =
flexible and dynamic
    >              >        networking.
    >              >
    >              >        Abstraction of network resources is a =
technique that can be applied
    >              >        to a single network domain or across =
multiple domains to create a
    >              >        single virtualized network that is under the =
control of a network
    >              >        operator or the customer of the operator =
that actually owns
    >              >        the network resources.
    >              >
    >              >        This document provides a framework for =
Abstraction and Control of
    >              >        Traffic Engineered Networks (ACTN).
    >              >
    >              >
    >              >
    >              >     The IETF datatracker status page for this draft =
is:
    >              >     =
https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
    >              >
    >              >     There are also htmlized versions available at:
    >              >     =
https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
    >              >
    >              > =
https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
    >              > 5
    >              >
    >              >     A diff from the previous version is available =
at:
    >              >
    >              > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >              >
    >              >
    >              >     Please note that it may take a couple of =
minutes from the time of
    >              >     submission until the htmlized version and diff =
are available at tools.ietf.org.
    >              >
    >              >     Internet-Drafts are also available by anonymous =
FTP at:
    >              >     ftp://ftp.ietf.org/internet-drafts/
    >              >
    >              >     _______________________________________________
    >              >     Teas mailing list
    >              >     Teas@ietf.org
    >              >     https://www.ietf.org/mailman/listinfo/teas
    >              >
    >              >     _______________________________________________
    >              >     Teas mailing list
    >              >     Teas@ietf.org
    >              >     https://www.ietf.org/mailman/listinfo/teas
    >              >
    >              >
    >              > _______________________________________________
    >              > Teas mailing list
    >              > Teas@ietf.org
    >              > https://www.ietf.org/mailman/listinfo/teas
    >              >
    >              > _______________________________________________
    >              > Teas mailing list
    >              > Teas@ietf.org
    >              > https://www.ietf.org/mailman/listinfo/teas
    >              >
    >              > _______________________________________________
    >              > Teas mailing list
    >              > Teas@ietf.org
    >              > https://www.ietf.org/mailman/listinfo/teas
    >              >
    >             =20
    >             =20
    >              _______________________________________________
    >              Teas mailing list
    >              Teas@ietf.org
    >              https://www.ietf.org/mailman/listinfo/teas
    >             =20
    >              _______________________________________________
    >              Teas mailing list
    >              Teas@ietf.org
    >              https://www.ietf.org/mailman/listinfo/teas
    >             =20
    >              _______________________________________________
    >              Netslices mailing list
    >              Netslices@ietf.org
    >              https://www.ietf.org/mailman/listinfo/netslices
    >              _______________________________________________
    >              Teas mailing list
    >              Teas@ietf.org
    >              https://www.ietf.org/mailman/listinfo/teas
    >             =20
    >         =20
    >         =20
    >          _______________________________________________
    >          Netslices mailing list
    >          Netslices@ietf.org
    >          https://www.ietf.org/mailman/listinfo/netslices
    >         =20
    >          _______________________________________________
    >          Teas mailing list
    >          Teas@ietf.org
    >          https://www.ietf.org/mailman/listinfo/teas
    >         =20
    >     =20
    >      _______________________________________________
    >      Teas mailing list
    >      Teas@ietf.org
    >      https://www.ietf.org/mailman/listinfo/teas
    >     =20
    >
    > _______________________________________________
    > Netslices mailing list
    > Netslices@ietf.org
    > https://www.ietf.org/mailman/listinfo/netslices
    >
    > _______________________________________________
    > Netslices mailing list
    > Netslices@ietf.org
    > https://www.ietf.org/mailman/listinfo/netslices
   =20
    _______________________________________________
    Netslices mailing list
    Netslices@ietf.org
    https://www.ietf.org/mailman/listinfo/netslices
   =20

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From: Igor Bryskin <Igor.Bryskin@huawei.com>
To: Gert Grammel <ggrammel@juniper.net>, Anton Ivanov <anton.ivanov@kot-begemot.co.uk>, "netslices@ietf.org" <netslices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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From: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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On 30/05/17 18:17, sebastian wrote:
> Hello, Igor, Gert,
>
> The high-level definition of a 'network slice' in 3GPP should serve as a context and background that is not violated,

I do not see any justification for such declarations of sanctity of 3GPP 
principles.

For example a slice representing a tenant in a vCPE design has nothing 
to do with 3GPP. It is clearly a slice. It fits the definition. It is 
not 3GPP.

It is also more in scope for IETF than any of the 3GPP RAN+Radio stuff.

Let's walk through it: customer premises networking and configuration 
(HOMENET), network overlays over WAN to CO (L2VPN, L3VPN, L2TP, 
L2TPEXT), Datacenter networking - NVO3, SFC, etc. All clearly in-scope, 
IETF and currently being worked on in 6+ working groups (either complete 
or active). All of them constitute the components of a slice which has 
nothing to do with 3GPP.

>   while drilling down into the details of the required suite of protocols and procedures (IETF), across the different layers of the stack.
>
> Support for the e2e(end-to-end) aspect of a 'network slice' is important to support the usage scenarios that underscore the 5G ecosystem.

Correct, however a lot of the e2e is orchestration material. It is not 
in scope for the IETF. The only part I can see in scope (unless I am 
missing something) is the model.

A.

>
> Many thanks.
> -Sebastian
>
> -----Original Message-----
> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor Bryskin
> Sent: Tuesday, May 30, 2017 9:21 AM
> To: Gert Grammel <ggrammel@juniper.net>; Anton Ivanov <anton.ivanov@kot-begemot.co.uk>; netslices@ietf.org
> Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>
> Gert,
>
> You seem to like the 3gpp network slice definition for all things it didn’t say anything about. It is a hack of a praise for a definition! :=)
>
> But in order to work on network slicing in IETF we need some (reasonably) tight definitions to see how we can actually help.
> So, when Anton enlists things like:
> "
>      1. Layer 3 and higher protocols.
>      2. Models describing network abstractions "
> I find it positive, helpful and constructive.
>
> Cheers,
> Igor
>
>
> -----Original Message-----
> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert Grammel
> Sent: Tuesday, May 30, 2017 9:54 AM
> To: Anton Ivanov; netslices@ietf.org
> Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>
> Anton,
>
> We are in agreement that the 3GPP definition is too high level. It is useful however that it stays away from a few arguments that frequently come up in our discussion:
> - It doesn't say end-to-end – hence no need to define "The End"
> - It doesn't require "dedicated" resources, hence no need to define levels of dedication
> - It doesn't use the term "layer", hence no need to define what a Layer would mean
> - It doesn't use "owner" to express a technical relation
>
> I am all for adding meat to above definition but at the same time reluctant to fall back using controversial terminology.
>
> Gert
>
>
>
>    
>
> On 2017-05-30, 14:39, "Netslices on behalf of Anton Ivanov" <netslices-bounces@ietf.org on behalf of anton.ivanov@kot-begemot.co.uk> wrote:
>
>      
>      
>      On 30/05/17 12:44, sebastian wrote:
>      > Hello, Gert,
>      >
>      > Good points.
>      >
>      > There are various instantiations of a 'network slice' that are likely, based on a diverse array of usage scenarios.
>      > These diverse instantiations of a 'network slice', with a corresponding allocation of the required logical or physical resources, should be allowed to suit different usage scenarios that may range from a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
>      >
>      > Hence a generalized definition for the instantiation of a 'network slice' such as the one referred to below (3GPP) is reasonable:
>      >      "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>      
>      That is excellent. And too broad. That can be anything from connection
>      between two computers and a whole provider network. They both fit this
>      rather elastic definition.
>      
>      So, in order for this to be discussed at IETF at all we should limit the
>      scope a little bit to one or more subject areas worked on at IETF:
>      
>      1. Layer 3 and higher protocols.
>      2. Models describing network abstractions
>      3. Interoperability with other IETF efforts.
>      
>      Otherwise, both the definition and the discussion should stay at 3GPP.
>      They are good at discussing schemes of world domination, though from a
>      point of view of network technology the results are quite often fit for
>      Mr Bean, instead of Mr Blofeld (as intended).
>      
>      A.
>      
>      >
>      > Many thanks.
>      > -Sebastian
>      >
>      > -----Original Message-----
>      > From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert Grammel
>      > Sent: Tuesday, May 30, 2017 6:17 AM
>      > To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; teas@ietf.org
>      > Cc: NetSlices@ietf.org
>      > Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>      >
>      > Hi Daniele,
>      >
>      > See below for more details:
>      >
>      > On 2017-05-30, 10:17, "Daniele Ceccarelli" <daniele.ceccarelli@ericsson.com> wrote:
>      >
>      >      Ciao Gert,
>      >
>      >      Please see in line
>      >      Cheers
>      >      Daniele
>      >
>      >
>      >      -----Original Message-----
>      >      From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>      >      Sent: lunedì 29 maggio 2017 15:34
>      >      To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>      >      Cc: NetSlices@ietf.org
>      >      Subject: Re: [Teas] [Netslices] terminology discussion network slicing
>      >
>      >      Daniele,
>      >
>      >      Trying to summarize what you're saying: a Network slice is an overlay network with minimum service guarantees, including virtual network functions available in this overlay network.
>      >      [>DC] why do you speak about an overlay network? If for example you have a site connected with a lambda to a data center and there you have a number of VNF, that's IMO a slice but there is no overlay. I'd say that there could be an overlay but that's not mandatory.
>      > GGR> A Lambda travels through a WDM which is a Multiplexer (see discussion below). So a lambda is in my view an overlay, the multiplexed signal (OMS) being the underlay.
>      >
>      >
>      >
>      >      In your text I have issues with "dedicated to a given customer". Whether such construct is dedicated to one or shared among several legal customers shouldn't be of concern for the definition of a Network Slice.
>      >      [>DC] Correct, it should be possible to have it dedicated or shared. We just need to make sure that both options are supported.
>      > GGR>> So if it can either be dedicated or shared, why mentioning this at all? Is there anything else?
>      >
>      >      On similar terms, whether a resource (being a NF or transport capacity) is shared or not is a design choice rather than a definition. In particular, Multiplexer by definition share some sort of common capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the nature of multiplexing technique shouldn't be a definition criteria for a Network Slice either.
>      >
>      >      Another food for thought:
>      >      - I would also add that a network slice may use it's own internal addressing scheme isolated from other slices. While this is optional, I would expect it to be used quite often.
>      >      [>DC] agree. Ala VPN.
>      >
>      >      - Why is it necessary to dedicate resources to a "Network Slice" at all? If e.g. a firewall NFV is in the DC and communicates over the Internet with a CPE (both belonging to a single owner) it would not fulfil the criteria of dedicated resource (Internet after all isn't dedicated), but it still looks pretty much like a "network slice".
>      >
>      >      [>DC] Think of remote surgery...wouldn't you want every single part of the end to end network from the doctor's hands to the scalpel being totally dedicated? :) ...and in that case I don't think the packets would go through the internet
>      > GGR>> There are a few issues here:
>      > 1)	this example looks a bit out-dated to me. There is only a one-to-one relationship between doctor and patient. This is what I would call a classical client-server model with protected resources. Ask for SONET leased line circuits if this is what a "slice" would mean. In defining what constitutes a slice you would also have to think about what constitutes a "doctor-slice" and what would be a "patient-slice"? (assuming responsible health care to avoid sarcastic interpretation)
>      > 2)	The question asked in my earlier email is whether the packets *must* go through a dedicated resource to call the thing "slice". In other words, if a thing that uses a non-dedicated "underlay" resource like the Internet can be called "slice" too? It is puzzling to me why the definition of "slice" would need any dedicated resource at all. It is in the end an implementers choice how much dedicated equipment is needed to provide a service. So why a slice has to use "dedicated resources", and what kind of "dedication" is meant? (See our earlier discussion about WDM)? Take your mobile as an example. It supports telephony and email. Those are different apps, potentially running in different VMs.
>      > a.	Is your phone a shared device or a dedicated one?
>      > b.	does using different apps means to use a different slices?
>      > c.	If you write emails to different recipients, would that qualify your email to be "dedicated", hence a different slice, just because they are in different address books?
>      > d.	If you switch from 3G to VoIP, does it mean to switch the slice, even if it is the same app?
>      >
>      > GGR> My thinking is that the definition of "slice" needs to make practical sense. The 3GPP definition is probably a bit too high level but makes sense to me:
>      >      "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>      >
>      >      Gert
>      >
>      >      On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" <teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> wrote:
>      >
>      >          Hi Sebastian, Jeff, Igor, all,
>      >
>      >          I understand Jeff and Igor agree on the fact that a network slice does not necessarily include resources in the radio segment/domain and in the packet core one.
>      >          An example could be an enterprise with dedicated resources in the "transport" segment (e.g. VPN, VN and TE-tunnels) that connect the customer premises to a data center where a number of VNF (e.g. firewall, nat, dpi) is dedicated to that given customer.
>      >          My personal opinion is that this should be considered a network slice.
>      >
>      >          The definition of network slice should allow for this scenario and mostly should clearly state whether this is included or not.
>      >
>      >          Sebastian, I don't understand if your statement:
>      >          " The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains."
>      >          implies that there must be a radio and a core segment in order to have a slice.
>      >
>      >          BR
>      >          Daniele
>      >
>      >
>      >          -----Original Message-----
>      >          From: sebastian [mailto:comscape@gmail.com]
>      >          Sent: domenica 28 maggio 2017 07:12
>      >          To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>      >          Cc: NetSlices@ietf.org
>      >          Subject: RE: [Netslices] [Teas] terminology discussion network slicing
>      >
>      >          Hello, Jeff,
>      >
>      >          Agree with your view that the scope (core and/or radio layer) of a 'network slice' could vary depending on the triggers for instantiating the 'network slice'.
>      >
>      >          On the other hand the instantiation of a 'network slice' may also be e2e (end-to-end), such as in device roaming scenarios, or in the case of vertical services that span different service providers.
>      >
>      >          The span of a 'network slice' is only limited by the availability of resources and appropriate policies (e.g. SLAs), independent of whether those resources are in the core network layer or in the radio network layer.
>      >
>      >          The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains.
>      >
>      >          Many thanks.
>      >          -Sebastian
>      >
>      >
>      >          -----Original Message-----
>      >          From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor Bryskin
>      >          Sent: Wednesday, May 24, 2017 7:56 AM
>      >          To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org
>      >          Cc: NetSlices@ietf.org
>      >          Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>      >
>      >          Thanks Jeff,
>      >
>      >          I am glad we are in sync.
>      >
>      >          Igor
>      >
>      >          -----Original Message-----
>      >          From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
>      >          Sent: Wednesday, May 24, 2017 8:45 AM
>      >          To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >          Cc: NetSlices@ietf.org
>      >          Subject: Re: [Teas] terminology discussion network slicing
>      >
>      >          +1 Igor
>      >
>      >          From transport side (L0-L3) we need to expose set of API’s that would allow to request a set of resources (a slice) either virtualized of physical that meet the constrains as requested by the business logic. Radio, while would definitely be one of most important use cases, would not be exclusively for radio use only. Any network management/ orchestration layer ideally should be able to use same set of API’s to request an e2e service.
>      >
>      >          Cheers,
>      >          Jeff
>      >
>      >
>      >          On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" <teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
>      >
>      >              Hi Cristina,
>      >
>      >              I didn’t say that ns has nothing to do with radio. I said that ns *may* have nothing to do with radio, i.e. may support/enable network architectures that do not involve radio necessarily.
>      >
>      >              Igor
>      >
>      >              -----Original Message-----
>      >              From: qiangli (D)
>      >              Sent: Wednesday, May 24, 2017 5:05 AM
>      >              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >              Cc: NetSlices@ietf.org
>      >              Subject: 答复: [Teas] terminology discussion network slicing
>      >
>      >              Hi Igor,
>      >
>      >              I share the same opinion on 5G and network slicing, but can't see the relation between this opinion and your conclusion that ns has nothing to do with radio.
>      >
>      >              Best regards,
>      >
>      >              Cristina QIANG
>      >
>      >
>      >              -----邮件原件-----
>      >              发件人: Igor Bryskin
>      >              发送时间: 2017年5月20日 23:50
>      >              收件人: qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >              抄送: NetSlices@ietf.org
>      >              主题: RE: [Teas] terminology discussion network slicing
>      >
>      >              Hi Cristina,
>      >
>      >              People whose opinion I respect very much told me that even the 3GPP network slicing definition and effort is not 5G specific.  Network slicing is viewed as an important capability of 5G, but it could serve other architectures.
>      >
>      >              Cheers,
>      >              Igor
>      >
>      >              -----Original Message-----
>      >              From: qiangli (D)
>      >              Sent: Saturday, May 20, 2017 5:27 AM
>      >              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >              Cc: NetSlices@ietf.org
>      >              Subject: 答复: [Teas] terminology discussion network slicing
>      >
>      >              Hi Igor,
>      >
>      >              I have different opinion on " Network slicing may have nothing to do with radio".
>      >              IMO, network slicing should be a resource-oriented management mode. The end-to-end network slice (from UE to server/other UE) of course involves the radio resource, usually we use the word "RAN-radio access network" rather than simply say "radio". The Frequency band, time, code, equipment/site, and software are a number of dimensions, in which RAN resources can be isolated [Online available http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-service-guaranteed-network-slicing-whitepaper].
>      >
>      >              Best regards,
>      >
>      >              Qiang, Li (Cristina)
>      >              NetLab, Huawei
>      >
>      >
>      >              -----邮件原件-----
>      >              发件人: Netslices [mailto:netslices-bounces@ietf.org] 代表 Igor Bryskin
>      >              发送时间: 2017年5月20日 6:12
>      >              收件人: Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >              抄送: NetSlices@ietf.org
>      >              主题: Re: [Netslices] [Teas] terminology discussion network slicing
>      >
>      >              Hi Danielle,
>      >
>      >              Network slicing may have nothing to do with radio. 5g is just a big reason as to why the interest/focus is back on network slicing, which is a very old concept. I don't think that anyone is arguing with what you wrote. The questions are:
>      >              a) how do you manage these "pieces"?
>      >              b) what policy infrastructure should be put in place?
>      >              c) how do you ensure their separation or, conversely, the degree of resource sharing?
>      >              d) why exactly legacy VPNs are not good enough?
>      >
>      >              Cheers,
>      >              Igor
>      >
>      >
>      >
>      >
>      >              -----Original Message-----
>      >              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
>      >              Sent: Friday, May 19, 2017 4:19 PM
>      >              To: Leeyoung; teas@ietf.org
>      >              Cc: NetSlices@ietf.org
>      >              Subject: Re: [Teas] terminology discussion network slicing
>      >
>      >              Hi Young, all,
>      >
>      >              i agree with your conclusion but would like to clarify one thing that IMO got lost in the discussion since its beginning.
>      >
>      >              The 3GPP definition says:
>      >              "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>      >
>      >              This means that a network slice IS NOT a VPN or a TE Tunnel.
>      >              A network slice is "something" (netslices and 3GPP will define what this something is) that is composed by a "piece" in the RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other pieces in possible other domains.
>      >
>      >              The word "transport" can be misleading here since one could think of transport technologies (e.g. WDM, OTN), but what I'm referring to as TRANSPORT DOMAIN is that part of the network that is used to carry a packet between two other domains.
>      >              In order to have a slice, that portion of the transport domain needs to be engineered, hence it is all about building a TE entity and stitching services to such entity. This is what is in the ACTN scope.
>      >
>      >              My very personal opinion is that whatever belongs to the transport domain belongs to IETF (and is already being addressed), while the rest is a dangerous duplication of concepts standardized is other SDOs...but this is another discussion that doesn't fit here.
>      >
>      >              BR
>      >              Daniele
>      >
>      >
>      >              -----Original Message-----
>      >              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
>      >              Sent: venerdì 19 maggio 2017 15:15
>      >              To: teas@ietf.org
>      >              Cc: NetSlices@ietf.org
>      >              Subject: Re: [Teas] terminology discussion network slicing
>      >
>      >              Hi,
>      >
>      >              Lou is right. There is a dedicated email list for the discussion of "network slicing (cc'ed)" and the discussion about what that term means should be held on that list.
>      >
>      >              We have used similar language in draft-ietf-teas-actn-framework right from the
>      >              00 version. Recent changes have been an attempt to clarify what the terminology means in the context of ACTN. We are not trying to define or redefine "network slicing" in the ACTN document, but are trying to make it clear how ACTN works.
>      >
>      >              Therefore I propose the following resolution:
>      >
>      >              1. All discussion of the general applicability and definition of "network slicing" is held on the netslices mailing list.
>      >
>      >              2. We adopt Adrian's suggestion to explain that the scope of the definition of the terms used in the ACTN framework is limited to ACTN. That means effectively that if there are components of a wider definition of network slicing that are not supported by ACTN, that will be OK.
>      >
>      >              I propose to post an updated version in the next few days and I believe that will allow this draft to move ahead without being blocked by the discussion in netslices. Once the IETF has a stable definition of network slicing we can return and see how ACTN is applicable to that definition an whether more wok is need (in a separate draft).
>      >
>      >              Thanks,
>      >              Young
>      >
>      >              -----Original Message-----
>      >              From: Lou Berger [mailto:lberger@labn.net]
>      >              Sent: Tuesday, May 16, 2017 8:35 AM
>      >              To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>      >              Subject: Re: [Teas] terminology discussion network slicing
>      >
>      >              Perhaps it's time to bring the discussion to the slicing list and report back their reaponse....
>      >
>      >              Lou
>      >
>      >
>      >              On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:
>      >
>      >              > Hi Sergio,
>      >              >
>      >              > I would also like to hear more from network slicing experts.
>      >              >
>      >              > My understanding is that the difference in the separation (in terms of
>      >              > control and data planes, security, etc.). For example, traditional BGP
>      >              > based L3 VPNs (that use provider's common control plane for their
>      >              > management and IP/MPLS TE tunnels to inter-connect their PEs) will
>      >              > probably not be able guarantee for the clients msec range connectivity
>      >              > setup times required by 5g, while provided by the same provider fully
>      >              > separated/genuinely private IP/MPLS networks (that do not share
>      >              > IP/MPLS control plane and infrastructure, whose network topology is
>      >              > supported by separate L0/L1 connections) hopefully will be able to
>      >              > provide such guarantees. Therefore, I define layer network slices as
>      >              > dynamically managed fully isolated in control and data planes private
>      >              > TE layer networks, which may share one or more underlying server layer networks.
>      >              >
>      >              >
>      >              > Cheers,
>      >              > Igor
>      >              >
>      >              >
>      >              >
>      >              >
>      >              > -----Original Message-----
>      >              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio
>      >              > (Nokia - IT/Vimercate)
>      >              > Sent: Tuesday, May 16, 2017 6:08 AM
>      >              > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
>      >              > Subject: Re: [Teas] terminology discussion network slicing
>      >              >
>      >              > Hi Gert,
>      >              >
>      >              > "Thinking a bit about it I came to the point where "VPN" and "network
>      >              > slices" seem to describe the same entity or at least a "network slice"
>      >              > being a VPN of VPNs?"
>      >              >
>      >              > I share completely your conclusion , I'd like if someone can explain
>      >              > if a difference really exists .
>      >              >
>      >              > Thanks
>      >              > Sergio
>      >              >
>      >              >
>      >              > -----Original Message-----
>      >              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>      >              > Sent: Monday, May 15, 2017 7:02 PM
>      >              > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>      >              > Subject: Re: [Teas] terminology discussion network slicing
>      >              >
>      >              > Leeyoung,
>      >              >
>      >              > Thank you for taking a stab on this. Usually when getting to a
>      >              > definition, I try to establish what kind of existing constructs would
>      >              > fall under the definition. If my understanding is correct, the
>      >              > following list of constructs would all satisfy the definition somehow.
>      >              > - A TDM network with a p2p TDM connection
>      >              > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
>      >              > - An MPLS LSP using a traffic engineered IP network
>      >              > - A L2VPN using a traffic engineered MPLS network
>      >              > - A L3VPN using a traffic engineered IP network
>      >              > - A TCP connection using a traffic engineered IP network
>      >              > - Different QoS classes in an IP network
>      >              >
>      >              > Thinking a bit about it I came to the point where "VPN" and "network
>      >              > slices" seem to describe the same entity or at least a "network slice"
>      >              > being a VPN of VPNs?
>      >              >
>      >              > Gert
>      >              >
>      >              >
>      >              > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
>      >              > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>      >              >
>      >              >     Hi Adrian and others,
>      >              >
>      >              >     We'd like cross check with you on some terminology we introduced newly. Any
>      >              >     comment on these terms will be greatly appreciated.
>      >              >
>      >              >     We introduced 'network slicing' as follows:
>      >              >
>      >              >             Network slicing is a collection of resources
>      >              >             that are used to establish logically dedicated virtual networks
>      >              >             over TE networks. It allows a network provider to provide
>      >              >             dedicated virtual networks for application/customer over a
>      >              >             common network infrastructure. The logically dedicated
>      >              >             resources are a part of the larger common network
>      >              >             infrastructures that are shared among various network slice
>      >              >             instances which are the end-to-end realization of network
>      >              >             slicing, consisting of the combination of physically or
>      >              >             logically dedicated resources.
>      >              >
>      >              >
>      >              >     Thanks.
>      >              >     Young and Daniele
>      >              >     -----Original Message-----
>      >              >     From: Leeyoung
>      >              >     Sent: Friday, May 05, 2017 1:41 PM
>      >              >     To: teas@ietf.org
>      >              >     Subject: RE: [Teas] I-D Action:
>      >              > draft-ietf-teas-actn-framework-05.txt
>      >              >
>      >              >     Hi,
>      >              >
>      >              >     This update is intended to incorporate the comments from the last WG
>      >              >     meeting and any pending issues. We also have taken the global editorial
>      >              >     changes to make it consistent through the document. Major changes are:
>      >              >
>      >              >     - Inclusion of "network slicing" definition from ACTN perspective (in the
>      >              >     terminology section)
>      >              >     - Added virtual network service (VNS) section (Section 3) to define types
>      >              >     of VNS.
>      >              >     - Incorporated "orchestration" (service/network) mapping to ACTN
>      >              >     architecture (See Section 5.2)
>      >              >     - Created a new section 6 (Topology Abstraction Method) where we imported
>      >              >     some texts from ACTN abstraction method
>      >              >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>      >              >     - Added Appendices A & B to discuss example deployment scenarios such as
>      >              >     example of MDSC and PNC functions integrated in Service/Network
>      >              >     Orchestrator (Appendix A) and example of IP + Optical network with L3VPN
>      >              >     service (Appendix B)
>      >              >
>      >              >     In regard to ACTN abstraction method draft, we are going to keep it as a
>      >              >     separate draft and use this document to elaborate other aspects not
>      >              >     imported to the framework document.
>      >              >
>      >              >     The following diff pointer will help you see the changes with this revision:
>      >              >
>      >              > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>      >              >
>      >              >     The co-authors believe that the document is ready for WG LC. Any
>      >              >     changes/comments will be appreciated.
>      >              >
>      >              >     Thanks & Best regards,
>      >              >     Young & Daniele (on behalf of other co-authors/contributors)
>      >              >
>      >              >     -----Original Message-----
>      >              >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-drafts@ietf.org
>      >              >     Sent: Friday, May 05, 2017 10:41 AM
>      >              >     To: i-d-announce@ietf.org
>      >              >     Cc: teas@ietf.org
>      >              >     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>      >              >
>      >              >
>      >              >     A New Internet-Draft is available from the on-line Internet-Drafts directories.
>      >              >     This draft is a work item of the Traffic Engineering Architecture and
>      >              >     Signaling of the IETF.
>      >              >
>      >              >             Title           : Framework for Abstraction and Control of Traffic
>      >              >             Engineered Networks
>      >              >             Authors         : Daniele Ceccarelli
>      >              >                               Young Lee
>      >              >     	Filename        : draft-ietf-teas-actn-framework-05.txt
>      >              >     	Pages           : 41
>      >              >     	Date            : 2017-05-05
>      >              >
>      >              >     Abstract:
>      >              >        Traffic Engineered networks have a variety of mechanisms to
>      >              >        facilitate the separation of the data plane and control plane. They
>      >              >        also have a range of management and provisioning protocols to
>      >              >        configure and activate network resources.  These mechanisms
>      >              >        represent key technologies for enabling flexible and dynamic
>      >              >        networking.
>      >              >
>      >              >        Abstraction of network resources is a technique that can be applied
>      >              >        to a single network domain or across multiple domains to create a
>      >              >        single virtualized network that is under the control of a network
>      >              >        operator or the customer of the operator that actually owns
>      >              >        the network resources.
>      >              >
>      >              >        This document provides a framework for Abstraction and Control of
>      >              >        Traffic Engineered Networks (ACTN).
>      >              >
>      >              >
>      >              >
>      >              >     The IETF datatracker status page for this draft is:
>      >              >     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>      >              >
>      >              >     There are also htmlized versions available at:
>      >              >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>      >              >
>      >              > https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
>      >              > 5
>      >              >
>      >              >     A diff from the previous version is available at:
>      >              >
>      >              > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>      >              >
>      >              >
>      >              >     Please note that it may take a couple of minutes from the time of
>      >              >     submission until the htmlized version and diff are available at tools.ietf.org.
>      >              >
>      >              >     Internet-Drafts are also available by anonymous FTP at:
>      >              >     ftp://ftp.ietf.org/internet-drafts/
>      >              >
>      >              >     _______________________________________________
>      >              >     Teas mailing list
>      >              >     Teas@ietf.org
>      >              >     https://www.ietf.org/mailman/listinfo/teas
>      >              >
>      >              >     _______________________________________________
>      >              >     Teas mailing list
>      >              >     Teas@ietf.org
>      >              >     https://www.ietf.org/mailman/listinfo/teas
>      >              >
>      >              >
>      >              > _______________________________________________
>      >              > Teas mailing list
>      >              > Teas@ietf.org
>      >              > https://www.ietf.org/mailman/listinfo/teas
>      >              >
>      >              > _______________________________________________
>      >              > Teas mailing list
>      >              > Teas@ietf.org
>      >              > https://www.ietf.org/mailman/listinfo/teas
>      >              >
>      >              > _______________________________________________
>      >              > Teas mailing list
>      >              > Teas@ietf.org
>      >              > https://www.ietf.org/mailman/listinfo/teas
>      >              >
>      >
>      >
>      >              _______________________________________________
>      >              Teas mailing list
>      >              Teas@ietf.org
>      >              https://www.ietf.org/mailman/listinfo/teas
>      >
>      >              _______________________________________________
>      >              Teas mailing list
>      >              Teas@ietf.org
>      >              https://www.ietf.org/mailman/listinfo/teas
>      >
>      >              _______________________________________________
>      >              Netslices mailing list
>      >              Netslices@ietf.org
>      >              https://www.ietf.org/mailman/listinfo/netslices
>      >              _______________________________________________
>      >              Teas mailing list
>      >              Teas@ietf.org
>      >              https://www.ietf.org/mailman/listinfo/teas
>      >
>      >
>      >
>      >          _______________________________________________
>      >          Netslices mailing list
>      >          Netslices@ietf.org
>      >          https://www.ietf.org/mailman/listinfo/netslices
>      >
>      >          _______________________________________________
>      >          Teas mailing list
>      >          Teas@ietf.org
>      >          https://www.ietf.org/mailman/listinfo/teas
>      >
>      >
>      >      _______________________________________________
>      >      Teas mailing list
>      >      Teas@ietf.org
>      >      https://www.ietf.org/mailman/listinfo/teas
>      >
>      >
>      > _______________________________________________
>      > Netslices mailing list
>      > Netslices@ietf.org
>      > https://www.ietf.org/mailman/listinfo/netslices
>      >
>      > _______________________________________________
>      > Netslices mailing list
>      > Netslices@ietf.org
>      > https://www.ietf.org/mailman/listinfo/netslices
>      
>      _______________________________________________
>      Netslices mailing list
>      Netslices@ietf.org
>      https://www.ietf.org/mailman/listinfo/netslices
>      
>
> _______________________________________________
> Netslices mailing list
> Netslices@ietf.org
> https://www.ietf.org/mailman/listinfo/netslices
> _______________________________________________
> Netslices mailing list
> Netslices@ietf.org
> https://www.ietf.org/mailman/listinfo/netslices
>
>



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From: "Kiran.Makhijani" <Kiran.Makhijani@huawei.com>
To: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>, "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, Igor Bryskin <Igor.Bryskin@huawei.com>, "'Gert Grammel'" <ggrammel@juniper.net>, "netslices@ietf.org" <netslices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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> On May 30, 2017:12:55 PM, at 12:55 PM, Gert Grammel =
<ggrammel@juniper.net> wrote:
>=20
> Igor,
>=20
> It appears to me that Anton and myself are pretty aligned in what =
would be needed, perhaps we have a little different approach in getting =
there. The 3GPP definition is way too broad for the IETF to work on =
something reasonable. However, it is at least a common starting point =
that has to be narrowed down. My point is that narrowing down by using =
fluffy terms is actually equivalent in broadening the scope even more.
> Anton's list is a valid attempt to narrow the scope and I would =
encourage him to continue (and others to contribute).
>=20
> The target is to define the term "Network Slice" in a way that can be =
used in the IETF and which is sharp enough to distinguish constructs =
that are no slice from constructs that are slices.

	And to the point of this list/BoF/etc=E2=80=A6  specifically =
describing what if anything, can be worked on here at the IETF.
To this point in the discussions, I agree with Anton in that it appears =
that it might just be models for managing
the service.

	=E2=80=94Tom


>=20
> Gert
>=20
>=20
> On 2017-05-30, 16:20, "Igor Bryskin" <Igor.Bryskin@huawei.com> wrote:
>=20
>    Gert,
>=20
>    You seem to like the 3gpp network slice definition for all things =
it didn=E2=80=99t say anything about. It is a hack of a praise for a =
definition! :=3D)
>=20
>    But in order to work on network slicing in IETF we need some =
(reasonably) tight definitions to see how we can actually help.
>    So, when Anton enlists things like:
>    "
>        1. Layer 3 and higher protocols.
>        2. Models describing network abstractions=20
>    "
>    I find it positive, helpful and constructive.
>=20
>    Cheers,
>    Igor
>=20
>=20
>    -----Original Message-----
>    From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of =
Gert Grammel
>    Sent: Tuesday, May 30, 2017 9:54 AM
>    To: Anton Ivanov; netslices@ietf.org
>    Subject: Re: [Netslices] [Teas] terminology discussion network =
slicing
>=20
>    Anton,
>=20
>    We are in agreement that the 3GPP definition is too high level. It =
is useful however that it stays away from a few arguments that =
frequently come up in our discussion:
>    - It doesn't say end-to-end =E2=80=93 hence no need to define "The =
End"
>    - It doesn't require "dedicated" resources, hence no need to define =
levels of dedication
>    - It doesn't use the term "layer", hence no need to define what a =
Layer would mean=20
>    - It doesn't use "owner" to express a technical relation
>=20
>    I am all for adding meat to above definition but at the same time =
reluctant to fall back using controversial terminology.
>=20
>    Gert
>=20
>=20
>=20
>=20
>=20
>    On 2017-05-30, 14:39, "Netslices on behalf of Anton Ivanov" =
<netslices-bounces@ietf.org on behalf of anton.ivanov@kot-begemot.co.uk> =
wrote:
>=20
>=20
>=20
>        On 30/05/17 12:44, sebastian wrote:
>> Hello, Gert,
>>=20
>> Good points.
>>=20
>> There are various instantiations of a 'network slice' that are =
likely, based on a diverse array of usage scenarios.
>> These diverse instantiations of a 'network slice', with a =
corresponding allocation of the required logical or physical resources, =
should be allowed to suit different usage scenarios that may range from =
a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
>>=20
>> Hence a generalized definition for the instantiation of a 'network =
slice' such as the one referred to below (3GPP) is reasonable:
>>     "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."
>=20
>        That is excellent. And too broad. That can be anything from =
connection=20
>        between two computers and a whole provider network. They both =
fit this=20
>        rather elastic definition.
>=20
>        So, in order for this to be discussed at IETF at all we should =
limit the=20
>        scope a little bit to one or more subject areas worked on at =
IETF:
>=20
>        1. Layer 3 and higher protocols.
>        2. Models describing network abstractions
>        3. Interoperability with other IETF efforts.
>=20
>        Otherwise, both the definition and the discussion should stay =
at 3GPP.=20
>        They are good at discussing schemes of world domination, though =
from a=20
>        point of view of network technology the results are quite often =
fit for=20
>        Mr Bean, instead of Mr Blofeld (as intended).
>=20
>        A.
>=20
>>=20
>> Many thanks.
>> -Sebastian
>>=20
>> -----Original Message-----
>> From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert =
Grammel
>> Sent: Tuesday, May 30, 2017 6:17 AM
>> To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; =
teas@ietf.org
>> Cc: NetSlices@ietf.org
>> Subject: Re: [Netslices] [Teas] terminology discussion network =
slicing
>>=20
>> Hi Daniele,
>>=20
>> See below for more details:
>>=20
>> On 2017-05-30, 10:17, "Daniele Ceccarelli" =
<daniele.ceccarelli@ericsson.com> wrote:
>>=20
>>     Ciao Gert,
>>=20
>>     Please see in line
>>     Cheers
>>     Daniele
>>=20
>>=20
>>     -----Original Message-----
>>     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert =
Grammel
>>     Sent: luned=C3=AC 29 maggio 2017 15:34
>>     To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; =
sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; =
'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' =
<qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>>     Cc: NetSlices@ietf.org
>>     Subject: Re: [Teas] [Netslices] terminology discussion network =
slicing
>>=20
>>     Daniele,
>>=20
>>     Trying to summarize what you're saying: a Network slice is an =
overlay network with minimum service guarantees, including virtual =
network functions available in this overlay network.
>>     [>DC] why do you speak about an overlay network? If for example =
you have a site connected with a lambda to a data center and there you =
have a number of VNF, that's IMO a slice but there is no overlay. I'd =
say that there could be an overlay but that's not mandatory.
>> GGR> A Lambda travels through a WDM which is a Multiplexer (see =
discussion below). So a lambda is in my view an overlay, the multiplexed =
signal (OMS) being the underlay.
>>=20
>>=20
>>=20
>>     In your text I have issues with "dedicated to a given customer". =
Whether such construct is dedicated to one or shared among several legal =
customers shouldn't be of concern for the definition of a Network Slice.
>>     [>DC] Correct, it should be possible to have it dedicated or =
shared. We just need to make sure that both options are supported.
>> GGR>> So if it can either be dedicated or shared, why mentioning this =
at all? Is there anything else?
>>=20
>>     On similar terms, whether a resource (being a NF or transport =
capacity) is shared or not is a design choice rather than a definition. =
In particular, Multiplexer by definition share some sort of common =
capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the =
nature of multiplexing technique shouldn't be a definition criteria for =
a Network Slice either.
>>=20
>>     Another food for thought:
>>     - I would also add that a network slice may use it's own internal =
addressing scheme isolated from other slices. While this is optional, I =
would expect it to be used quite often.
>>     [>DC] agree. Ala VPN.
>>=20
>>     - Why is it necessary to dedicate resources to a "Network Slice" =
at all? If e.g. a firewall NFV is in the DC and communicates over the =
Internet with a CPE (both belonging to a single owner) it would not =
fulfil the criteria of dedicated resource (Internet after all isn't =
dedicated), but it still looks pretty much like a "network slice".
>>=20
>>     [>DC] Think of remote surgery...wouldn't you want every single =
part of the end to end network from the doctor's hands to the scalpel =
being totally dedicated? :) ...and in that case I don't think the =
packets would go through the internet
>> GGR>> There are a few issues here:
>> 1)	this example looks a bit out-dated to me. There is only a =
one-to-one relationship between doctor and patient. This is what I would =
call a classical client-server model with protected resources. Ask for =
SONET leased line circuits if this is what a "slice" would mean. In =
defining what constitutes a slice you would also have to think about =
what constitutes a "doctor-slice" and what would be a "patient-slice"? =
(assuming responsible health care to avoid sarcastic interpretation)
>> 2)	The question asked in my earlier email is whether the packets =
*must* go through a dedicated resource to call the thing "slice". In =
other words, if a thing that uses a non-dedicated "underlay" resource =
like the Internet can be called "slice" too? It is puzzling to me why =
the definition of "slice" would need any dedicated resource at all. It =
is in the end an implementers choice how much dedicated equipment is =
needed to provide a service. So why a slice has to use "dedicated =
resources", and what kind of "dedication" is meant? (See our earlier =
discussion about WDM)? Take your mobile as an example. It supports =
telephony and email. Those are different apps, potentially running in =
different VMs.
>> a.	Is your phone a shared device or a dedicated one?
>> b.	does using different apps means to use a different slices?
>> c.	If you write emails to different recipients, would that qualify =
your email to be "dedicated", hence a different slice, just because they =
are in different address books?
>> d.	If you switch from 3G to VoIP, does it mean to switch the slice, =
even if it is the same app?
>>=20
>> GGR> My thinking is that the definition of "slice" needs to make =
practical sense. The 3GPP definition is probably a bit too high level =
but makes sense to me:
>>     "A set of network functions and the resources for these network =
functions which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."
>>=20
>>     Gert
>>=20
>>     On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" =
<teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> =
wrote:
>>=20
>>         Hi Sebastian, Jeff, Igor, all,
>>=20
>>         I understand Jeff and Igor agree on the fact that a network =
slice does not necessarily include resources in the radio segment/domain =
and in the packet core one.
>>         An example could be an enterprise with dedicated resources in =
the "transport" segment (e.g. VPN, VN and TE-tunnels) that connect the =
customer premises to a data center where a number of VNF (e.g. firewall, =
nat, dpi) is dedicated to that given customer.
>>         My personal opinion is that this should be considered a =
network slice.
>>=20
>>         The definition of network slice should allow for this =
scenario and mostly should clearly state whether this is included or =
not.
>>=20
>>         Sebastian, I don't understand if your statement:
>>         " The management and orchestration of resources should be =
capable of instantiating a 'network slice' with an e2e (end-to-end) =
scope, where the scope could be between two devices, connected across =
intervening radio networks and core networks that may belong to the same =
or different administrative domains."
>>         implies that there must be a radio and a core segment in =
order to have a slice.
>>=20
>>         BR
>>         Daniele
>>=20
>>=20
>>         -----Original Message-----
>>         From: sebastian [mailto:comscape@gmail.com]
>>         Sent: domenica 28 maggio 2017 07:12
>>         To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' =
<jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele =
Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' =
<leeyoung@huawei.com>; teas@ietf.org
>>         Cc: NetSlices@ietf.org
>>         Subject: RE: [Netslices] [Teas] terminology discussion =
network slicing
>>=20
>>         Hello, Jeff,
>>=20
>>         Agree with your view that the scope (core and/or radio layer) =
of a 'network slice' could vary depending on the triggers for =
instantiating the 'network slice'.
>>=20
>>         On the other hand the instantiation of a 'network slice' may =
also be e2e (end-to-end), such as in device roaming scenarios, or in the =
case of vertical services that span different service providers.
>>=20
>>         The span of a 'network slice' is only limited by the =
availability of resources and appropriate policies (e.g. SLAs), =
independent of whether those resources are in the core network layer or =
in the radio network layer.
>>=20
>>         The management and orchestration of resources should be =
capable of instantiating a 'network slice' with an e2e (end-to-end) =
scope, where the scope could be between two devices, connected across =
intervening radio networks and core networks that may belong to the same =
or different administrative domains.
>>=20
>>         Many thanks.
>>         -Sebastian
>>=20
>>=20
>>         -----Original Message-----
>>         From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf =
Of Igor Bryskin
>>         Sent: Wednesday, May 24, 2017 7:56 AM
>>         To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) =
<qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org
>>         Cc: NetSlices@ietf.org
>>         Subject: Re: [Netslices] [Teas] terminology discussion =
network slicing
>>=20
>>         Thanks Jeff,
>>=20
>>         I am glad we are in sync.
>>=20
>>         Igor
>>=20
>>         -----Original Message-----
>>         From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
>>         Sent: Wednesday, May 24, 2017 8:45 AM
>>         To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>>         Cc: NetSlices@ietf.org
>>         Subject: Re: [Teas] terminology discussion network slicing
>>=20
>>         +1 Igor
>>=20
>>         =46rom transport side (L0-L3) we need to expose set of =
API=E2=80=99s that would allow to request a set of resources (a slice) =
either virtualized of physical that meet the constrains as requested by =
the business logic. Radio, while would definitely be one of most =
important use cases, would not be exclusively for radio use only. Any =
network management/ orchestration layer ideally should be able to use =
same set of API=E2=80=99s to request an e2e service.
>>=20
>>         Cheers,
>>         Jeff
>>=20
>>=20
>>         On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" =
<teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
>>=20
>>             Hi Cristina,
>>=20
>>             I didn=E2=80=99t say that ns has nothing to do with =
radio. I said that ns *may* have nothing to do with radio, i.e. may =
support/enable network architectures that do not involve radio =
necessarily.
>>=20
>>             Igor
>>=20
>>             -----Original Message-----
>>             From: qiangli (D)
>>             Sent: Wednesday, May 24, 2017 5:05 AM
>>             To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>>             Cc: NetSlices@ietf.org
>>             Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology =
discussion network slicing
>>=20
>>             Hi Igor,
>>=20
>>             I share the same opinion on 5G and network slicing, but =
can't see the relation between this opinion and your conclusion that ns =
has nothing to do with radio.
>>=20
>>             Best regards,
>>=20
>>             Cristina QIANG
>>=20
>>=20
>>             -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
>>             =E5=8F=91=E4=BB=B6=E4=BA=BA: Igor Bryskin
>>             =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2017=E5=B9=B45=E6=9C=88=
20=E6=97=A5 23:50
>>             =E6=94=B6=E4=BB=B6=E4=BA=BA: qiangli (D); Daniele =
Ceccarelli; Leeyoung; teas@ietf.org
>>             =E6=8A=84=E9=80=81: NetSlices@ietf.org
>>             =E4=B8=BB=E9=A2=98: RE: [Teas] terminology discussion =
network slicing
>>=20
>>             Hi Cristina,
>>=20
>>             People whose opinion I respect very much told me that =
even the 3GPP network slicing definition and effort is not 5G specific.  =
Network slicing is viewed as an important capability of 5G, but it could =
serve other architectures.
>>=20
>>             Cheers,
>>             Igor
>>=20
>>             -----Original Message-----
>>             From: qiangli (D)
>>             Sent: Saturday, May 20, 2017 5:27 AM
>>             To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; =
teas@ietf.org
>>             Cc: NetSlices@ietf.org
>>             Subject: =E7=AD=94=E5=A4=8D: [Teas] terminology =
discussion network slicing
>>=20
>>             Hi Igor,
>>=20
>>             I have different opinion on " Network slicing may have =
nothing to do with radio".
>>             IMO, network slicing should be a resource-oriented =
management mode. The end-to-end network slice (from UE to server/other =
UE) of course involves the radio resource, usually we use the word =
"RAN-radio access network" rather than simply say "radio". The Frequency =
band, time, code, equipment/site, and software are a number of =
dimensions, in which RAN resources can be isolated [Online available =
http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-ser=
vice-guaranteed-network-slicing-whitepaper].
>>=20
>>             Best regards,
>>=20
>>             Qiang, Li (Cristina)
>>             NetLab, Huawei
>>=20
>>=20
>>             -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
>>             =E5=8F=91=E4=BB=B6=E4=BA=BA: Netslices =
[mailto:netslices-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Igor Bryskin
>>             =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2017=E5=B9=B45=E6=9C=88=
20=E6=97=A5 6:12
>>             =E6=94=B6=E4=BB=B6=E4=BA=BA: Daniele Ceccarelli; =
Leeyoung; teas@ietf.org
>>             =E6=8A=84=E9=80=81: NetSlices@ietf.org
>>             =E4=B8=BB=E9=A2=98: Re: [Netslices] [Teas] terminology =
discussion network slicing
>>=20
>>             Hi Danielle,
>>=20
>>             Network slicing may have nothing to do with radio. 5g is =
just a big reason as to why the interest/focus is back on network =
slicing, which is a very old concept. I don't think that anyone is =
arguing with what you wrote. The questions are:
>>             a) how do you manage these "pieces"?
>>             b) what policy infrastructure should be put in place?
>>             c) how do you ensure their separation or, conversely, the =
degree of resource sharing?
>>             d) why exactly legacy VPNs are not good enough?
>>=20
>>             Cheers,
>>             Igor
>>=20
>>=20
>>=20
>>=20
>>             -----Original Message-----
>>             From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Daniele Ceccarelli
>>             Sent: Friday, May 19, 2017 4:19 PM
>>             To: Leeyoung; teas@ietf.org
>>             Cc: NetSlices@ietf.org
>>             Subject: Re: [Teas] terminology discussion network =
slicing
>>=20
>>             Hi Young, all,
>>=20
>>             i agree with your conclusion but would like to clarify =
one thing that IMO got lost in the discussion since its beginning.
>>=20
>>             The 3GPP definition says:
>>             "A set of network functions and the resources for these =
network functions which are arranged and configured, forming a complete =
logical network to meet certain network characteristics."
>>=20
>>             This means that a network slice IS NOT a VPN or a TE =
Tunnel.
>>             A network slice is "something" (netslices and 3GPP will =
define what this something is) that is composed by a "piece" in the =
RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT =
domain, plus possible other pieces in possible other domains.
>>=20
>>             The word "transport" can be misleading here since one =
could think of transport technologies (e.g. WDM, OTN), but what I'm =
referring to as TRANSPORT DOMAIN is that part of the network that is =
used to carry a packet between two other domains.
>>             In order to have a slice, that portion of the transport =
domain needs to be engineered, hence it is all about building a TE =
entity and stitching services to such entity. This is what is in the =
ACTN scope.
>>=20
>>             My very personal opinion is that whatever belongs to the =
transport domain belongs to IETF (and is already being addressed), while =
the rest is a dangerous duplication of concepts standardized is other =
SDOs...but this is another discussion that doesn't fit here.
>>=20
>>             BR
>>             Daniele
>>=20
>>=20
>>             -----Original Message-----
>>             From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Leeyoung
>>             Sent: venerd=C3=AC 19 maggio 2017 15:15
>>             To: teas@ietf.org
>>             Cc: NetSlices@ietf.org
>>             Subject: Re: [Teas] terminology discussion network =
slicing
>>=20
>>             Hi,
>>=20
>>             Lou is right. There is a dedicated email list for the =
discussion of "network slicing (cc'ed)" and the discussion about what =
that term means should be held on that list.
>>=20
>>             We have used similar language in =
draft-ietf-teas-actn-framework right from the
>>             00 version. Recent changes have been an attempt to =
clarify what the terminology means in the context of ACTN. We are not =
trying to define or redefine "network slicing" in the ACTN document, but =
are trying to make it clear how ACTN works.
>>=20
>>             Therefore I propose the following resolution:
>>=20
>>             1. All discussion of the general applicability and =
definition of "network slicing" is held on the netslices mailing list.
>>=20
>>             2. We adopt Adrian's suggestion to explain that the scope =
of the definition of the terms used in the ACTN framework is limited to =
ACTN. That means effectively that if there are components of a wider =
definition of network slicing that are not supported by ACTN, that will =
be OK.
>>=20
>>             I propose to post an updated version in the next few days =
and I believe that will allow this draft to move ahead without being =
blocked by the discussion in netslices. Once the IETF has a stable =
definition of network slicing we can return and see how ACTN is =
applicable to that definition an whether more wok is need (in a separate =
draft).
>>=20
>>             Thanks,
>>             Young
>>=20
>>             -----Original Message-----
>>             From: Lou Berger [mailto:lberger@labn.net]
>>             Sent: Tuesday, May 16, 2017 8:35 AM
>>             To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, =
Sergio (Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel =
<ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
>>             Subject: Re: [Teas] terminology discussion network =
slicing
>>=20
>>             Perhaps it's time to bring the discussion to the slicing =
list and report back their reaponse....
>>=20
>>             Lou
>>=20
>>=20
>>             On May 16, 2017 8:31:19 AM Igor Bryskin =
<Igor.Bryskin@huawei.com> wrote:
>>=20
>>> Hi Sergio,
>>>=20
>>> I would also like to hear more from network slicing experts.
>>>=20
>>> My understanding is that the difference in the separation (in terms =
of
>>> control and data planes, security, etc.). For example, traditional =
BGP
>>> based L3 VPNs (that use provider's common control plane for their
>>> management and IP/MPLS TE tunnels to inter-connect their PEs) will
>>> probably not be able guarantee for the clients msec range =
connectivity
>>> setup times required by 5g, while provided by the same provider =
fully
>>> separated/genuinely private IP/MPLS networks (that do not share
>>> IP/MPLS control plane and infrastructure, whose network topology is
>>> supported by separate L0/L1 connections) hopefully will be able to
>>> provide such guarantees. Therefore, I define layer network slices as
>>> dynamically managed fully isolated in control and data planes =
private
>>> TE layer networks, which may share one or more underlying server =
layer networks.
>>>=20
>>>=20
>>> Cheers,
>>> Igor
>>>=20
>>>=20
>>>=20
>>>=20
>>> -----Original Message-----
>>> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, =
Sergio
>>> (Nokia - IT/Vimercate)
>>> Sent: Tuesday, May 16, 2017 6:08 AM
>>> To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
>>> Subject: Re: [Teas] terminology discussion network slicing
>>>=20
>>> Hi Gert,
>>>=20
>>> "Thinking a bit about it I came to the point where "VPN" and =
"network
>>> slices" seem to describe the same entity or at least a "network =
slice"
>>> being a VPN of VPNs?"
>>>=20
>>> I share completely your conclusion , I'd like if someone can explain
>>> if a difference really exists .
>>>=20
>>> Thanks
>>> Sergio
>>>=20
>>>=20
>>> -----Original Message-----
>>> From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>>> Sent: Monday, May 15, 2017 7:02 PM
>>> To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; =
adrian@olddog.co.uk
>>> Subject: Re: [Teas] terminology discussion network slicing
>>>=20
>>> Leeyoung,
>>>=20
>>> Thank you for taking a stab on this. Usually when getting to a
>>> definition, I try to establish what kind of existing constructs =
would
>>> fall under the definition. If my understanding is correct, the
>>> following list of constructs would all satisfy the definition =
somehow.
>>> - A TDM network with a p2p TDM connection
>>> - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
>>> - An MPLS LSP using a traffic engineered IP network
>>> - A L2VPN using a traffic engineered MPLS network
>>> - A L3VPN using a traffic engineered IP network
>>> - A TCP connection using a traffic engineered IP network
>>> - Different QoS classes in an IP network
>>>=20
>>> Thinking a bit about it I came to the point where "VPN" and "network
>>> slices" seem to describe the same entity or at least a "network =
slice"
>>> being a VPN of VPNs?
>>>=20
>>> Gert
>>>=20
>>>=20
>>> On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
>>> <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>>>=20
>>>    Hi Adrian and others,
>>>=20
>>>    We'd like cross check with you on some terminology we introduced =
newly. Any
>>>    comment on these terms will be greatly appreciated.
>>>=20
>>>    We introduced 'network slicing' as follows:
>>>=20
>>>            Network slicing is a collection of resources
>>>            that are used to establish logically dedicated virtual =
networks
>>>            over TE networks. It allows a network provider to provide
>>>            dedicated virtual networks for application/customer over =
a
>>>            common network infrastructure. The logically dedicated
>>>            resources are a part of the larger common network
>>>            infrastructures that are shared among various network =
slice
>>>            instances which are the end-to-end realization of network
>>>            slicing, consisting of the combination of physically or
>>>            logically dedicated resources.
>>>=20
>>>=20
>>>    Thanks.
>>>    Young and Daniele
>>>    -----Original Message-----
>>>    From: Leeyoung
>>>    Sent: Friday, May 05, 2017 1:41 PM
>>>    To: teas@ietf.org
>>>    Subject: RE: [Teas] I-D Action:
>>> draft-ietf-teas-actn-framework-05.txt
>>>=20
>>>    Hi,
>>>=20
>>>    This update is intended to incorporate the comments from the last =
WG
>>>    meeting and any pending issues. We also have taken the global =
editorial
>>>    changes to make it consistent through the document. Major changes =
are:
>>>=20
>>>    - Inclusion of "network slicing" definition from ACTN perspective =
(in the
>>>    terminology section)
>>>    - Added virtual network service (VNS) section (Section 3) to =
define types
>>>    of VNS.
>>>    - Incorporated "orchestration" (service/network) mapping to ACTN
>>>    architecture (See Section 5.2)
>>>    - Created a new section 6 (Topology Abstraction Method) where we =
imported
>>>    some texts from ACTN abstraction method
>>>    https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>>>    - Added Appendices A & B to discuss example deployment scenarios =
such as
>>>    example of MDSC and PNC functions integrated in Service/Network
>>>    Orchestrator (Appendix A) and example of IP + Optical network =
with L3VPN
>>>    service (Appendix B)
>>>=20
>>>    In regard to ACTN abstraction method draft, we are going to keep =
it as a
>>>    separate draft and use this document to elaborate other aspects =
not
>>>    imported to the framework document.
>>>=20
>>>    The following diff pointer will help you see the changes with =
this revision:
>>>=20
>>> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>>>=20
>>>    The co-authors believe that the document is ready for WG LC. Any
>>>    changes/comments will be appreciated.
>>>=20
>>>    Thanks & Best regards,
>>>    Young & Daniele (on behalf of other co-authors/contributors)
>>>=20
>>>    -----Original Message-----
>>>    From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
internet-drafts@ietf.org
>>>    Sent: Friday, May 05, 2017 10:41 AM
>>>    To: i-d-announce@ietf.org
>>>    Cc: teas@ietf.org
>>>    Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>>>=20
>>>=20
>>>    A New Internet-Draft is available from the on-line =
Internet-Drafts directories.
>>>    This draft is a work item of the Traffic Engineering Architecture =
and
>>>    Signaling of the IETF.
>>>=20
>>>            Title           : Framework for Abstraction and Control =
of Traffic
>>>            Engineered Networks
>>>            Authors         : Daniele Ceccarelli
>>>                              Young Lee
>>>    	Filename        : draft-ietf-teas-actn-framework-05.txt
>>>    	Pages           : 41
>>>    	Date            : 2017-05-05
>>>=20
>>>    Abstract:
>>>       Traffic Engineered networks have a variety of mechanisms to
>>>       facilitate the separation of the data plane and control plane. =
They
>>>       also have a range of management and provisioning protocols to
>>>       configure and activate network resources.  These mechanisms
>>>       represent key technologies for enabling flexible and dynamic
>>>       networking.
>>>=20
>>>       Abstraction of network resources is a technique that can be =
applied
>>>       to a single network domain or across multiple domains to =
create a
>>>       single virtualized network that is under the control of a =
network
>>>       operator or the customer of the operator that actually owns
>>>       the network resources.
>>>=20
>>>       This document provides a framework for Abstraction and Control =
of
>>>       Traffic Engineered Networks (ACTN).
>>>=20
>>>=20
>>>=20
>>>    The IETF datatracker status page for this draft is:
>>>    https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>>>=20
>>>    There are also htmlized versions available at:
>>>    https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>>>=20
>>> =
https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
>>> 5
>>>=20
>>>    A diff from the previous version is available at:
>>>=20
>>> https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
>>>=20
>>>=20
>>>    Please note that it may take a couple of minutes from the time of
>>>    submission until the htmlized version and diff are available at =
tools.ietf.org.
>>>=20
>>>    Internet-Drafts are also available by anonymous FTP at:
>>>    ftp://ftp.ietf.org/internet-drafts/
>>>=20
>>>    _______________________________________________
>>>    Teas mailing list
>>>    Teas@ietf.org
>>>    https://www.ietf.org/mailman/listinfo/teas
>>>=20
>>>    _______________________________________________
>>>    Teas mailing list
>>>    Teas@ietf.org
>>>    https://www.ietf.org/mailman/listinfo/teas
>>>=20
>>>=20
>>> _______________________________________________
>>> Teas mailing list
>>> Teas@ietf.org
>>> https://www.ietf.org/mailman/listinfo/teas
>>>=20
>>> _______________________________________________
>>> Teas mailing list
>>> Teas@ietf.org
>>> https://www.ietf.org/mailman/listinfo/teas
>>>=20
>>> _______________________________________________
>>> Teas mailing list
>>> Teas@ietf.org
>>> https://www.ietf.org/mailman/listinfo/teas
>>>=20
>>=20
>>=20
>>             _______________________________________________
>>             Teas mailing list
>>             Teas@ietf.org
>>             https://www.ietf.org/mailman/listinfo/teas
>>=20
>>             _______________________________________________
>>             Teas mailing list
>>             Teas@ietf.org
>>             https://www.ietf.org/mailman/listinfo/teas
>>=20
>>             _______________________________________________
>>             Netslices mailing list
>>             Netslices@ietf.org
>>             https://www.ietf.org/mailman/listinfo/netslices
>>             _______________________________________________
>>             Teas mailing list
>>             Teas@ietf.org
>>             https://www.ietf.org/mailman/listinfo/teas
>>=20
>>=20
>>=20
>>         _______________________________________________
>>         Netslices mailing list
>>         Netslices@ietf.org
>>         https://www.ietf.org/mailman/listinfo/netslices
>>=20
>>         _______________________________________________
>>         Teas mailing list
>>         Teas@ietf.org
>>         https://www.ietf.org/mailman/listinfo/teas
>>=20
>>=20
>>     _______________________________________________
>>     Teas mailing list
>>     Teas@ietf.org
>>     https://www.ietf.org/mailman/listinfo/teas
>>=20
>>=20
>> _______________________________________________
>> Netslices mailing list
>> Netslices@ietf.org
>> https://www.ietf.org/mailman/listinfo/netslices
>>=20
>> _______________________________________________
>> Netslices mailing list
>> Netslices@ietf.org
>> https://www.ietf.org/mailman/listinfo/netslices
>=20
>        _______________________________________________
>        Netslices mailing list
>        Netslices@ietf.org
>        https://www.ietf.org/mailman/listinfo/netslices
>=20
>=20
>    _______________________________________________
>    Netslices mailing list
>    Netslices@ietf.org
>    https://www.ietf.org/mailman/listinfo/netslices
>=20
>=20
> _______________________________________________
> Netslices mailing list
> Netslices@ietf.org
> https://www.ietf.org/mailman/listinfo/netslices


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From: Gert Grammel <ggrammel@juniper.net>
To: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>, "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, 'Igor Bryskin' <Igor.Bryskin@huawei.com>, "netslices@ietf.org" <netslices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netslices/SGlowBDa1wvqffiNPUkeCQEJ7S0>
Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Reply-To: <sebastian.thalanany@ieee.org>
From: "sebastian" <comscape@gmail.com>
To: "'Gert Grammel'" <ggrammel@juniper.net>, "'Anton Ivanov'" <anton.ivanov@kot-begemot.co.uk>, <sebastian.thalanany@ieee.org>, "'Igor Bryskin'" <Igor.Bryskin@huawei.com>, <netslices@ietf.org>
References: <7AEB3D6833318045B4AE71C2C87E8E172B2CA60E@SJCEML702-CHM.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD007863909953AFA@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB520C@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD0078639099662D6@SJCEML702-CHM.china.huawei.com> <4B13E4DA-DB18-4454-AFC4-57A8B1264CE1@gmail.com> <0C72C38E7EBC34499E8A9E7DD00786390996673B@SJCEML702-CHM.china.huawei.com> <AM2PR07MB09948AF604E3C7869296AEDCF0F30@AM2PR07MB0994.eurprd07.prod.outlook.com> <7625E93C-8E51-4B2F-B28C-FB2A5287FD99@juniper.net> <VI1PR07MB1005262C6FC0CC75EF9D3AA1F0F00@VI1PR07MB1005.eurprd07.prod.outlook.com> <AB42001E-4A0E-4019-A373-D46BAB1ECB78@juniper.net> <001f01d2d93a$0ab65de0$202319a0$@gmail.com> <aadfe32c-b079-8427-a738-dc5ef9e45703@kot-begemot.co.uk> <1A3ED087-9AE3-48C5-B135-D09B0F34AB75@juniper.net> <006601d2d968$99a43f30$ccecbd90$@gmail.com> <53e51b66-6c15-1a49-1ae4-1698a68bb8a2@kot-begemot.co.uk> <88168550-50C9-4489-9FD2-1D9CF652AD0A@juniper.net>
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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Hello, Gert, Igor, Anton,

Agree that the source of the definition, is not as significant as the =
definition for a 'network slice':

Quoted from the text below:
"A set of network functions and the resources for these network =
functions, which are arranged and configured, forming a complete logical =
network to meet certain network characteristics."

The phrase 'complete logical network' is the 'network slice'
See the NGMN reference, on the 'network slice' concept:
https://www.ngmn.org/uploads/media/161010_NGMN_Network_Slicing_framework_=
v1.0.8.pdf=20

Orchestration aspects to instantiate a 'network slice' could be =
referenced by the draft, where it may not be in-scope for the draft.

Many thanks.
-Sebastian


-----Original Message-----
From: Gert Grammel [mailto:ggrammel@juniper.net]=20
Sent: Tuesday, May 30, 2017 3:02 PM
To: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>; =
sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; =
netslices@ietf.org
Subject: Re: [Netslices] [Teas] terminology discussion network slicing

Anton,

I am a bit confused about your last email.=20
Lets forget for a moment the source of the definition (was 3GPP) "A set =
of network functions and the resources for these network functions which =
are arranged and configured, forming a complete logical network to meet =
certain network characteristics."

For more see in line


    On 30/05/17 18:17, sebastian wrote:
    > Hello, Igor, Gert,
    >
    > The high-level definition of a 'network slice' in 3GPP should =
serve as a context and background that is not violated,
   =20
    I do not see any justification for such declarations of sanctity of =
3GPP=20
    principles.
=E2=86=92 what are 3GPP principles and why should they be sanctuary?
   =20
    For example a slice representing a tenant in a vCPE design has =
nothing=20
    to do with 3GPP. It is clearly a slice. It fits the definition. It =
is=20
    not 3GPP.
=E2=86=92 can you tell me how a tenant in a vCPE design would not fall =
in above definition of a slice?
   =20
    It is also more in scope for IETF than any of the 3GPP RAN+Radio =
stuff.
=E2=86=92 there is no RAN mentioned in above definition
   =20
    Let's walk through it: customer premises networking and =
configuration=20
    (HOMENET), network overlays over WAN to CO (L2VPN, L3VPN, L2TP,=20
    L2TPEXT), Datacenter networking - NVO3, SFC, etc. All clearly =
in-scope,=20
    IETF and currently being worked on in 6+ working groups (either =
complete=20
    or active). All of them constitute the components of a slice which =
has=20
    nothing to do with 3GPP.
=E2=86=92 agree, but the definition provided by 3GPP seems to cover =
those cases
   =20
    >   while drilling down into the details of the required suite of =
protocols and procedures (IETF), across the different layers of the =
stack.
    >
    > Support for the e2e(end-to-end) aspect of a 'network slice' is =
important to support the usage scenarios that underscore the 5G =
ecosystem.
   =20
    Correct, however a lot of the e2e is orchestration material. It is =
not=20
    in scope for the IETF. The only part I can see in scope (unless I am =

    missing something) is the model.
=E2=86=92 before concluding what is missing, I would prefer to get a =
clear and agreed view of what the heck do we mean with "network slice" =
and what do we not mean by "network slice".
   =20
- Gert=20
    A.
   =20
    >
    > Many thanks.
    > -Sebastian
    >
    > -----Original Message-----
    > From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of =
Igor Bryskin
    > Sent: Tuesday, May 30, 2017 9:21 AM
    > To: Gert Grammel <ggrammel@juniper.net>; Anton Ivanov =
<anton.ivanov@kot-begemot.co.uk>; netslices@ietf.org
    > Subject: Re: [Netslices] [Teas] terminology discussion network =
slicing
    >
    > Gert,
    >
    > You seem to like the 3gpp network slice definition for all things =
it didn=E2=80=99t say anything about. It is a hack of a praise for a =
definition! :=3D)
    >
    > But in order to work on network slicing in IETF we need some =
(reasonably) tight definitions to see how we can actually help.
    > So, when Anton enlists things like:
    > "
    >      1. Layer 3 and higher protocols.
    >      2. Models describing network abstractions "
    > I find it positive, helpful and constructive.
    >
    > Cheers,
    > Igor
    >
    >
    > -----Original Message-----
    > From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of =
Gert Grammel
    > Sent: Tuesday, May 30, 2017 9:54 AM
    > To: Anton Ivanov; netslices@ietf.org
    > Subject: Re: [Netslices] [Teas] terminology discussion network =
slicing
    >
    > Anton,
    >
    > We are in agreement that the 3GPP definition is too high level. It =
is useful however that it stays away from a few arguments that =
frequently come up in our discussion:
    > - It doesn't say end-to-end =E2=80=93 hence no need to define "The =
End"
    > - It doesn't require "dedicated" resources, hence no need to =
define levels of dedication
    > - It doesn't use the term "layer", hence no need to define what a =
Layer would mean
    > - It doesn't use "owner" to express a technical relation
    >
    > I am all for adding meat to above definition but at the same time =
reluctant to fall back using controversial terminology.
    >
    > Gert
    >
    >
    >
    >   =20
    >
    > On 2017-05-30, 14:39, "Netslices on behalf of Anton Ivanov" =
<netslices-bounces@ietf.org on behalf of anton.ivanov@kot-begemot.co.uk> =
wrote:
    >
    >     =20
    >     =20
    >      On 30/05/17 12:44, sebastian wrote:
    >      > Hello, Gert,
    >      >
    >      > Good points.
    >      >
    >      > There are various instantiations of a 'network slice' that =
are likely, based on a diverse array of usage scenarios.
    >      > These diverse instantiations of a 'network slice', with a =
corresponding allocation of the required logical or physical resources, =
should be allowed to suit different usage scenarios that may range from =
a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
    >      >
    >      > Hence a generalized definition for the instantiation of a =
'network slice' such as the one referred to below (3GPP) is reasonable:
    >      >      "A set of network functions and the resources for =
these network functions which are arranged and configured, forming a =
complete logical network to meet certain network characteristics."
    >     =20
    >      That is excellent. And too broad. That can be anything from =
connection
    >      between two computers and a whole provider network. They both =
fit this
    >      rather elastic definition.
    >     =20
    >      So, in order for this to be discussed at IETF at all we =
should limit the
    >      scope a little bit to one or more subject areas worked on at =
IETF:
    >     =20
    >      1. Layer 3 and higher protocols.
    >      2. Models describing network abstractions
    >      3. Interoperability with other IETF efforts.
    >     =20
    >      Otherwise, both the definition and the discussion should stay =
at 3GPP.
    >      They are good at discussing schemes of world domination, =
though from a
    >      point of view of network technology the results are quite =
often fit for
    >      Mr Bean, instead of Mr Blofeld (as intended).
    >     =20
    >      A.
    >     =20
    >      >
    >      > Many thanks.
    >      > -Sebastian
    >      >
    >      > -----Original Message-----
    >      > From: Netslices [mailto:netslices-bounces@ietf.org] On =
Behalf Of Gert Grammel
    >      > Sent: Tuesday, May 30, 2017 6:17 AM
    >      > To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; =
teas@ietf.org
    >      > Cc: NetSlices@ietf.org
    >      > Subject: Re: [Netslices] [Teas] terminology discussion =
network slicing
    >      >
    >      > Hi Daniele,
    >      >
    >      > See below for more details:
    >      >
    >      > On 2017-05-30, 10:17, "Daniele Ceccarelli" =
<daniele.ceccarelli@ericsson.com> wrote:
    >      >
    >      >      Ciao Gert,
    >      >
    >      >      Please see in line
    >      >      Cheers
    >      >      Daniele
    >      >
    >      >
    >      >      -----Original Message-----
    >      >      From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of =
Gert Grammel
    >      >      Sent: luned=C3=AC 29 maggio 2017 15:34
    >      >      To: Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; sebastian.thalanany@ieee.org; 'Igor =
Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' =
<jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; =
'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
    >      >      Cc: NetSlices@ietf.org
    >      >      Subject: Re: [Teas] [Netslices] terminology discussion =
network slicing
    >      >
    >      >      Daniele,
    >      >
    >      >      Trying to summarize what you're saying: a Network =
slice is an overlay network with minimum service guarantees, including =
virtual network functions available in this overlay network.
    >      >      [>DC] why do you speak about an overlay network? If =
for example you have a site connected with a lambda to a data center and =
there you have a number of VNF, that's IMO a slice but there is no =
overlay. I'd say that there could be an overlay but that's not =
mandatory.
    >      > GGR> A Lambda travels through a WDM which is a Multiplexer =
(see discussion below). So a lambda is in my view an overlay, the =
multiplexed signal (OMS) being the underlay.
    >      >
    >      >
    >      >
    >      >      In your text I have issues with "dedicated to a given =
customer". Whether such construct is dedicated to one or shared among =
several legal customers shouldn't be of concern for the definition of a =
Network Slice.
    >      >      [>DC] Correct, it should be possible to have it =
dedicated or shared. We just need to make sure that both options are =
supported.
    >      > GGR>> So if it can either be dedicated or shared, why =
mentioning this at all? Is there anything else?
    >      >
    >      >      On similar terms, whether a resource (being a NF or =
transport capacity) is shared or not is a design choice rather than a =
definition. In particular, Multiplexer by definition share some sort of =
common capacity irrespective whether it is TDM, Packet, WDM or CDM. So, =
the nature of multiplexing technique shouldn't be a definition criteria =
for a Network Slice either.
    >      >
    >      >      Another food for thought:
    >      >      - I would also add that a network slice may use it's =
own internal addressing scheme isolated from other slices. While this is =
optional, I would expect it to be used quite often.
    >      >      [>DC] agree. Ala VPN.
    >      >
    >      >      - Why is it necessary to dedicate resources to a =
"Network Slice" at all? If e.g. a firewall NFV is in the DC and =
communicates over the Internet with a CPE (both belonging to a single =
owner) it would not fulfil the criteria of dedicated resource (Internet =
after all isn't dedicated), but it still looks pretty much like a =
"network slice".
    >      >
    >      >      [>DC] Think of remote surgery...wouldn't you want =
every single part of the end to end network from the doctor's hands to =
the scalpel being totally dedicated? :) ...and in that case I don't =
think the packets would go through the internet
    >      > GGR>> There are a few issues here:
    >      > 1)	this example looks a bit out-dated to me. There is only =
a one-to-one relationship between doctor and patient. This is what I =
would call a classical client-server model with protected resources. Ask =
for SONET leased line circuits if this is what a "slice" would mean. In =
defining what constitutes a slice you would also have to think about =
what constitutes a "doctor-slice" and what would be a "patient-slice"? =
(assuming responsible health care to avoid sarcastic interpretation)
    >      > 2)	The question asked in my earlier email is whether the =
packets *must* go through a dedicated resource to call the thing =
"slice". In other words, if a thing that uses a non-dedicated "underlay" =
resource like the Internet can be called "slice" too? It is puzzling to =
me why the definition of "slice" would need any dedicated resource at =
all. It is in the end an implementers choice how much dedicated =
equipment is needed to provide a service. So why a slice has to use =
"dedicated resources", and what kind of "dedication" is meant? (See our =
earlier discussion about WDM)? Take your mobile as an example. It =
supports telephony and email. Those are different apps, potentially =
running in different VMs.
    >      > a.	Is your phone a shared device or a dedicated one?
    >      > b.	does using different apps means to use a different =
slices?
    >      > c.	If you write emails to different recipients, would that =
qualify your email to be "dedicated", hence a different slice, just =
because they are in different address books?
    >      > d.	If you switch from 3G to VoIP, does it mean to switch =
the slice, even if it is the same app?
    >      >
    >      > GGR> My thinking is that the definition of "slice" needs to =
make practical sense. The 3GPP definition is probably a bit too high =
level but makes sense to me:
    >      >      "A set of network functions and the resources for =
these network functions which are arranged and configured, forming a =
complete logical network to meet certain network characteristics."
    >      >
    >      >      Gert
    >      >
    >      >      On 2017-05-29, 11:01, "Teas on behalf of Daniele =
Ceccarelli" <teas-bounces@ietf.org on behalf of =
daniele.ceccarelli@ericsson.com> wrote:
    >      >
    >      >          Hi Sebastian, Jeff, Igor, all,
    >      >
    >      >          I understand Jeff and Igor agree on the fact that =
a network slice does not necessarily include resources in the radio =
segment/domain and in the packet core one.
    >      >          An example could be an enterprise with dedicated =
resources in the "transport" segment (e.g. VPN, VN and TE-tunnels) that =
connect the customer premises to a data center where a number of VNF =
(e.g. firewall, nat, dpi) is dedicated to that given customer.
    >      >          My personal opinion is that this should be =
considered a network slice.
    >      >
    >      >          The definition of network slice should allow for =
this scenario and mostly should clearly state whether this is included =
or not.
    >      >
    >      >          Sebastian, I don't understand if your statement:
    >      >          " The management and orchestration of resources =
should be capable of instantiating a 'network slice' with an e2e =
(end-to-end) scope, where the scope could be between two devices, =
connected across intervening radio networks and core networks that may =
belong to the same or different administrative domains."
    >      >          implies that there must be a radio and a core =
segment in order to have a slice.
    >      >
    >      >          BR
    >      >          Daniele
    >      >
    >      >
    >      >          -----Original Message-----
    >      >          From: sebastian [mailto:comscape@gmail.com]
    >      >          Sent: domenica 28 maggio 2017 07:12
    >      >          To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; =
'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' =
<qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; 'Leeyoung' <leeyoung@huawei.com>; =
teas@ietf.org
    >      >          Cc: NetSlices@ietf.org
    >      >          Subject: RE: [Netslices] [Teas] terminology =
discussion network slicing
    >      >
    >      >          Hello, Jeff,
    >      >
    >      >          Agree with your view that the scope (core and/or =
radio layer) of a 'network slice' could vary depending on the triggers =
for instantiating the 'network slice'.
    >      >
    >      >          On the other hand the instantiation of a 'network =
slice' may also be e2e (end-to-end), such as in device roaming =
scenarios, or in the case of vertical services that span different =
service providers.
    >      >
    >      >          The span of a 'network slice' is only limited by =
the availability of resources and appropriate policies (e.g. SLAs), =
independent of whether those resources are in the core network layer or =
in the radio network layer.
    >      >
    >      >          The management and orchestration of resources =
should be capable of instantiating a 'network slice' with an e2e =
(end-to-end) scope, where the scope could be between two devices, =
connected across intervening radio networks and core networks that may =
belong to the same or different administrative domains.
    >      >
    >      >          Many thanks.
    >      >          -Sebastian
    >      >
    >      >
    >      >          -----Original Message-----
    >      >          From: Netslices =
[mailto:netslices-bounces@ietf.org] On Behalf Of Igor Bryskin
    >      >          Sent: Wednesday, May 24, 2017 7:56 AM
    >      >          To: Jeff Tantsura <jefftant.ietf@gmail.com>; =
qiangli (D) <qiangli3@huawei.com>; Daniele Ceccarelli =
<daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org
    >      >          Cc: NetSlices@ietf.org
    >      >          Subject: Re: [Netslices] [Teas] terminology =
discussion network slicing
    >      >
    >      >          Thanks Jeff,
    >      >
    >      >          I am glad we are in sync.
    >      >
    >      >          Igor
    >      >
    >      >          -----Original Message-----
    >      >          From: Jeff Tantsura =
[mailto:jefftant.ietf@gmail.com]
    >      >          Sent: Wednesday, May 24, 2017 8:45 AM
    >      >          To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; =
Leeyoung; teas@ietf.org
    >      >          Cc: NetSlices@ietf.org
    >      >          Subject: Re: [Teas] terminology discussion network =
slicing
    >      >
    >      >          +1 Igor
    >      >
    >      >          From transport side (L0-L3) we need to expose set =
of API=E2=80=99s that would allow to request a set of resources (a =
slice) either virtualized of physical that meet the constrains as =
requested by the business logic. Radio, while would definitely be one of =
most important use cases, would not be exclusively for radio use only. =
Any network management/ orchestration layer ideally should be able to =
use same set of API=E2=80=99s to request an e2e service.
    >      >
    >      >          Cheers,
    >      >          Jeff
    >      >
    >      >
    >      >          On 5/24/17, 05:26, "Teas on behalf of Igor =
Bryskin" <teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> =
wrote:
    >      >
    >      >              Hi Cristina,
    >      >
    >      >              I didn=E2=80=99t say that ns has nothing to do =
with radio. I said that ns *may* have nothing to do with radio, i.e. may =
support/enable network architectures that do not involve radio =
necessarily.
    >      >
    >      >              Igor
    >      >
    >      >              -----Original Message-----
    >      >              From: qiangli (D)
    >      >              Sent: Wednesday, May 24, 2017 5:05 AM
    >      >              To: Igor Bryskin; Daniele Ceccarelli; =
Leeyoung; teas@ietf.org
    >      >              Cc: NetSlices@ietf.org
    >      >              Subject: =E7=AD=94=E5=A4=8D: [Teas] =
terminology discussion network slicing
    >      >
    >      >              Hi Igor,
    >      >
    >      >              I share the same opinion on 5G and network =
slicing, but can't see the relation between this opinion and your =
conclusion that ns has nothing to do with radio.
    >      >
    >      >              Best regards,
    >      >
    >      >              Cristina QIANG
    >      >
    >      >
    >      >              -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    >      >              =E5=8F=91=E4=BB=B6=E4=BA=BA: Igor Bryskin
    >      >              =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 23:50
    >      >              =E6=94=B6=E4=BB=B6=E4=BA=BA: qiangli (D); =
Daniele Ceccarelli; Leeyoung; teas@ietf.org
    >      >              =E6=8A=84=E9=80=81: NetSlices@ietf.org
    >      >              =E4=B8=BB=E9=A2=98: RE: [Teas] terminology =
discussion network slicing
    >      >
    >      >              Hi Cristina,
    >      >
    >      >              People whose opinion I respect very much told =
me that even the 3GPP network slicing definition and effort is not 5G =
specific.  Network slicing is viewed as an important capability of 5G, =
but it could serve other architectures.
    >      >
    >      >              Cheers,
    >      >              Igor
    >      >
    >      >              -----Original Message-----
    >      >              From: qiangli (D)
    >      >              Sent: Saturday, May 20, 2017 5:27 AM
    >      >              To: Igor Bryskin; Daniele Ceccarelli; =
Leeyoung; teas@ietf.org
    >      >              Cc: NetSlices@ietf.org
    >      >              Subject: =E7=AD=94=E5=A4=8D: [Teas] =
terminology discussion network slicing
    >      >
    >      >              Hi Igor,
    >      >
    >      >              I have different opinion on " Network slicing =
may have nothing to do with radio".
    >      >              IMO, network slicing should be a =
resource-oriented management mode. The end-to-end network slice (from UE =
to server/other UE) of course involves the radio resource, usually we =
use the word "RAN-radio access network" rather than simply say "radio". =
The Frequency band, time, code, equipment/site, and software are a =
number of dimensions, in which RAN resources can be isolated [Online =
available =
http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-se=
rvice-guaranteed-network-slicing-whitepaper].
    >      >
    >      >              Best regards,
    >      >
    >      >              Qiang, Li (Cristina)
    >      >              NetLab, Huawei
    >      >
    >      >
    >      >              -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
    >      >              =E5=8F=91=E4=BB=B6=E4=BA=BA: Netslices =
[mailto:netslices-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 Igor Bryskin
    >      >              =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: =
2017=E5=B9=B45=E6=9C=8820=E6=97=A5 6:12
    >      >              =E6=94=B6=E4=BB=B6=E4=BA=BA: Daniele =
Ceccarelli; Leeyoung; teas@ietf.org
    >      >              =E6=8A=84=E9=80=81: NetSlices@ietf.org
    >      >              =E4=B8=BB=E9=A2=98: Re: [Netslices] [Teas] =
terminology discussion network slicing
    >      >
    >      >              Hi Danielle,
    >      >
    >      >              Network slicing may have nothing to do with =
radio. 5g is just a big reason as to why the interest/focus is back on =
network slicing, which is a very old concept. I don't think that anyone =
is arguing with what you wrote. The questions are:
    >      >              a) how do you manage these "pieces"?
    >      >              b) what policy infrastructure should be put in =
place?
    >      >              c) how do you ensure their separation or, =
conversely, the degree of resource sharing?
    >      >              d) why exactly legacy VPNs are not good =
enough?
    >      >
    >      >              Cheers,
    >      >              Igor
    >      >
    >      >
    >      >
    >      >
    >      >              -----Original Message-----
    >      >              From: Teas [mailto:teas-bounces@ietf.org] On =
Behalf Of Daniele Ceccarelli
    >      >              Sent: Friday, May 19, 2017 4:19 PM
    >      >              To: Leeyoung; teas@ietf.org
    >      >              Cc: NetSlices@ietf.org
    >      >              Subject: Re: [Teas] terminology discussion =
network slicing
    >      >
    >      >              Hi Young, all,
    >      >
    >      >              i agree with your conclusion but would like to =
clarify one thing that IMO got lost in the discussion since its =
beginning.
    >      >
    >      >              The 3GPP definition says:
    >      >              "A set of network functions and the resources =
for these network functions which are arranged and configured, forming a =
complete logical network to meet certain network characteristics."
    >      >
    >      >              This means that a network slice IS NOT a VPN =
or a TE Tunnel.
    >      >              A network slice is "something" (netslices and =
3GPP will define what this something is) that is composed by a "piece" =
in the RADIO domain, a "piece" in the CLOUD domain, a "piece" in the =
TRANSPORT domain, plus possible other pieces in possible other domains.
    >      >
    >      >              The word "transport" can be misleading here =
since one could think of transport technologies (e.g. WDM, OTN), but =
what I'm referring to as TRANSPORT DOMAIN is that part of the network =
that is used to carry a packet between two other domains.
    >      >              In order to have a slice, that portion of the =
transport domain needs to be engineered, hence it is all about building =
a TE entity and stitching services to such entity. This is what is in =
the ACTN scope.
    >      >
    >      >              My very personal opinion is that whatever =
belongs to the transport domain belongs to IETF (and is already being =
addressed), while the rest is a dangerous duplication of concepts =
standardized is other SDOs...but this is another discussion that doesn't =
fit here.
    >      >
    >      >              BR
    >      >              Daniele
    >      >
    >      >
    >      >              -----Original Message-----
    >      >              From: Teas [mailto:teas-bounces@ietf.org] On =
Behalf Of Leeyoung
    >      >              Sent: venerd=C3=AC 19 maggio 2017 15:15
    >      >              To: teas@ietf.org
    >      >              Cc: NetSlices@ietf.org
    >      >              Subject: Re: [Teas] terminology discussion =
network slicing
    >      >
    >      >              Hi,
    >      >
    >      >              Lou is right. There is a dedicated email list =
for the discussion of "network slicing (cc'ed)" and the discussion about =
what that term means should be held on that list.
    >      >
    >      >              We have used similar language in =
draft-ietf-teas-actn-framework right from the
    >      >              00 version. Recent changes have been an =
attempt to clarify what the terminology means in the context of ACTN. We =
are not trying to define or redefine "network slicing" in the ACTN =
document, but are trying to make it clear how ACTN works.
    >      >
    >      >              Therefore I propose the following resolution:
    >      >
    >      >              1. All discussion of the general applicability =
and definition of "network slicing" is held on the netslices mailing =
list.
    >      >
    >      >              2. We adopt Adrian's suggestion to explain =
that the scope of the definition of the terms used in the ACTN framework =
is limited to ACTN. That means effectively that if there are components =
of a wider definition of network slicing that are not supported by ACTN, =
that will be OK.
    >      >
    >      >              I propose to post an updated version in the =
next few days and I believe that will allow this draft to move ahead =
without being blocked by the discussion in netslices. Once the IETF has =
a stable definition of network slicing we can return and see how ACTN is =
applicable to that definition an whether more wok is need (in a separate =
draft).
    >      >
    >      >              Thanks,
    >      >              Young
    >      >
    >      >              -----Original Message-----
    >      >              From: Lou Berger [mailto:lberger@labn.net]
    >      >              Sent: Tuesday, May 16, 2017 8:35 AM
    >      >              To: Igor Bryskin <Igor.Bryskin@huawei.com>; =
Belotti, Sergio (Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert =
Grammel <ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org; adrian@olddog.co.uk
    >      >              Subject: Re: [Teas] terminology discussion =
network slicing
    >      >
    >      >              Perhaps it's time to bring the discussion to =
the slicing list and report back their reaponse....
    >      >
    >      >              Lou
    >      >
    >      >
    >      >              On May 16, 2017 8:31:19 AM Igor Bryskin =
<Igor.Bryskin@huawei.com> wrote:
    >      >
    >      >              > Hi Sergio,
    >      >              >
    >      >              > I would also like to hear more from network =
slicing experts.
    >      >              >
    >      >              > My understanding is that the difference in =
the separation (in terms of
    >      >              > control and data planes, security, etc.). =
For example, traditional BGP
    >      >              > based L3 VPNs (that use provider's common =
control plane for their
    >      >              > management and IP/MPLS TE tunnels to =
inter-connect their PEs) will
    >      >              > probably not be able guarantee for the =
clients msec range connectivity
    >      >              > setup times required by 5g, while provided =
by the same provider fully
    >      >              > separated/genuinely private IP/MPLS networks =
(that do not share
    >      >              > IP/MPLS control plane and infrastructure, =
whose network topology is
    >      >              > supported by separate L0/L1 connections) =
hopefully will be able to
    >      >              > provide such guarantees. Therefore, I define =
layer network slices as
    >      >              > dynamically managed fully isolated in =
control and data planes private
    >      >              > TE layer networks, which may share one or =
more underlying server layer networks.
    >      >              >
    >      >              >
    >      >              > Cheers,
    >      >              > Igor
    >      >              >
    >      >              >
    >      >              >
    >      >              >
    >      >              > -----Original Message-----
    >      >              > From: Teas [mailto:teas-bounces@ietf.org] On =
Behalf Of Belotti, Sergio
    >      >              > (Nokia - IT/Vimercate)
    >      >              > Sent: Tuesday, May 16, 2017 6:08 AM
    >      >              > To: Gert Grammel; Leeyoung; teas@ietf.org; =
adrian@olddog.co.uk
    >      >              > Subject: Re: [Teas] terminology discussion =
network slicing
    >      >              >
    >      >              > Hi Gert,
    >      >              >
    >      >              > "Thinking a bit about it I came to the point =
where "VPN" and "network
    >      >              > slices" seem to describe the same entity or =
at least a "network slice"
    >      >              > being a VPN of VPNs?"
    >      >              >
    >      >              > I share completely your conclusion , I'd =
like if someone can explain
    >      >              > if a difference really exists .
    >      >              >
    >      >              > Thanks
    >      >              > Sergio
    >      >              >
    >      >              >
    >      >              > -----Original Message-----
    >      >              > From: Teas [mailto:teas-bounces@ietf.org] On =
Behalf Of Gert Grammel
    >      >              > Sent: Monday, May 15, 2017 7:02 PM
    >      >              > To: Leeyoung <leeyoung@huawei.com>; =
teas@ietf.org; adrian@olddog.co.uk
    >      >              > Subject: Re: [Teas] terminology discussion =
network slicing
    >      >              >
    >      >              > Leeyoung,
    >      >              >
    >      >              > Thank you for taking a stab on this. Usually =
when getting to a
    >      >              > definition, I try to establish what kind of =
existing constructs would
    >      >              > fall under the definition. If my =
understanding is correct, the
    >      >              > following list of constructs would all =
satisfy the definition somehow.
    >      >              > - A TDM network with a p2p TDM connection
    >      >              > - A PSC capable network carrying a p2p =
circuit (such as EPL/EVPL)
    >      >              > - An MPLS LSP using a traffic engineered IP =
network
    >      >              > - A L2VPN using a traffic engineered MPLS =
network
    >      >              > - A L3VPN using a traffic engineered IP =
network
    >      >              > - A TCP connection using a traffic =
engineered IP network
    >      >              > - Different QoS classes in an IP network
    >      >              >
    >      >              > Thinking a bit about it I came to the point =
where "VPN" and "network
    >      >              > slices" seem to describe the same entity or =
at least a "network slice"
    >      >              > being a VPN of VPNs?
    >      >              >
    >      >              > Gert
    >      >              >
    >      >              >
    >      >              > On 2017-05-17, 16:44, "Teas on behalf of =
Leeyoung"
    >      >              > <teas-bounces@ietf.org on behalf of =
leeyoung@huawei.com> wrote:
    >      >              >
    >      >              >     Hi Adrian and others,
    >      >              >
    >      >              >     We'd like cross check with you on some =
terminology we introduced newly. Any
    >      >              >     comment on these terms will be greatly =
appreciated.
    >      >              >
    >      >              >     We introduced 'network slicing' as =
follows:
    >      >              >
    >      >              >             Network slicing is a collection =
of resources
    >      >              >             that are used to establish =
logically dedicated virtual networks
    >      >              >             over TE networks. It allows a =
network provider to provide
    >      >              >             dedicated virtual networks for =
application/customer over a
    >      >              >             common network infrastructure. =
The logically dedicated
    >      >              >             resources are a part of the =
larger common network
    >      >              >             infrastructures that are shared =
among various network slice
    >      >              >             instances which are the =
end-to-end realization of network
    >      >              >             slicing, consisting of the =
combination of physically or
    >      >              >             logically dedicated resources.
    >      >              >
    >      >              >
    >      >              >     Thanks.
    >      >              >     Young and Daniele
    >      >              >     -----Original Message-----
    >      >              >     From: Leeyoung
    >      >              >     Sent: Friday, May 05, 2017 1:41 PM
    >      >              >     To: teas@ietf.org
    >      >              >     Subject: RE: [Teas] I-D Action:
    >      >              > draft-ietf-teas-actn-framework-05.txt
    >      >              >
    >      >              >     Hi,
    >      >              >
    >      >              >     This update is intended to incorporate =
the comments from the last WG
    >      >              >     meeting and any pending issues. We also =
have taken the global editorial
    >      >              >     changes to make it consistent through =
the document. Major changes are:
    >      >              >
    >      >              >     - Inclusion of "network slicing" =
definition from ACTN perspective (in the
    >      >              >     terminology section)
    >      >              >     - Added virtual network service (VNS) =
section (Section 3) to define types
    >      >              >     of VNS.
    >      >              >     - Incorporated "orchestration" =
(service/network) mapping to ACTN
    >      >              >     architecture (See Section 5.2)
    >      >              >     - Created a new section 6 (Topology =
Abstraction Method) where we imported
    >      >              >     some texts from ACTN abstraction method
    >      >              >     =
https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
    >      >              >     - Added Appendices A & B to discuss =
example deployment scenarios such as
    >      >              >     example of MDSC and PNC functions =
integrated in Service/Network
    >      >              >     Orchestrator (Appendix A) and example of =
IP + Optical network with L3VPN
    >      >              >     service (Appendix B)
    >      >              >
    >      >              >     In regard to ACTN abstraction method =
draft, we are going to keep it as a
    >      >              >     separate draft and use this document to =
elaborate other aspects not
    >      >              >     imported to the framework document.
    >      >              >
    >      >              >     The following diff pointer will help you =
see the changes with this revision:
    >      >              >
    >      >              > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >      >              >
    >      >              >     The co-authors believe that the document =
is ready for WG LC. Any
    >      >              >     changes/comments will be appreciated.
    >      >              >
    >      >              >     Thanks & Best regards,
    >      >              >     Young & Daniele (on behalf of other =
co-authors/contributors)
    >      >              >
    >      >              >     -----Original Message-----
    >      >              >     From: Teas =
[mailto:teas-bounces@ietf.org] On Behalf Of internet-drafts@ietf.org
    >      >              >     Sent: Friday, May 05, 2017 10:41 AM
    >      >              >     To: i-d-announce@ietf.org
    >      >              >     Cc: teas@ietf.org
    >      >              >     Subject: [Teas] I-D Action: =
draft-ietf-teas-actn-framework-05.txt
    >      >              >
    >      >              >
    >      >              >     A New Internet-Draft is available from =
the on-line Internet-Drafts directories.
    >      >              >     This draft is a work item of the Traffic =
Engineering Architecture and
    >      >              >     Signaling of the IETF.
    >      >              >
    >      >              >             Title           : Framework for =
Abstraction and Control of Traffic
    >      >              >             Engineered Networks
    >      >              >             Authors         : Daniele =
Ceccarelli
    >      >              >                               Young Lee
    >      >              >     	Filename        : =
draft-ietf-teas-actn-framework-05.txt
    >      >              >     	Pages           : 41
    >      >              >     	Date            : 2017-05-05
    >      >              >
    >      >              >     Abstract:
    >      >              >        Traffic Engineered networks have a =
variety of mechanisms to
    >      >              >        facilitate the separation of the data =
plane and control plane. They
    >      >              >        also have a range of management and =
provisioning protocols to
    >      >              >        configure and activate network =
resources.  These mechanisms
    >      >              >        represent key technologies for =
enabling flexible and dynamic
    >      >              >        networking.
    >      >              >
    >      >              >        Abstraction of network resources is a =
technique that can be applied
    >      >              >        to a single network domain or across =
multiple domains to create a
    >      >              >        single virtualized network that is =
under the control of a network
    >      >              >        operator or the customer of the =
operator that actually owns
    >      >              >        the network resources.
    >      >              >
    >      >              >        This document provides a framework =
for Abstraction and Control of
    >      >              >        Traffic Engineered Networks (ACTN).
    >      >              >
    >      >              >
    >      >              >
    >      >              >     The IETF datatracker status page for =
this draft is:
    >      >              >     =
https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
    >      >              >
    >      >              >     There are also htmlized versions =
available at:
    >      >              >     =
https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
    >      >              >
    >      >              > =
https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
    >      >              > 5
    >      >              >
    >      >              >     A diff from the previous version is =
available at:
    >      >              >
    >      >              > =
https://www.ietf.org/rfcdiff?url2=3Ddraft-ietf-teas-actn-framework-05
    >      >              >
    >      >              >
    >      >              >     Please note that it may take a couple of =
minutes from the time of
    >      >              >     submission until the htmlized version =
and diff are available at tools.ietf.org.
    >      >              >
    >      >              >     Internet-Drafts are also available by =
anonymous FTP at:
    >      >              >     ftp://ftp.ietf.org/internet-drafts/
    >      >              >
    >      >              >     =
_______________________________________________
    >      >              >     Teas mailing list
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    >     =20
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To: Gert Grammel <ggrammel@juniper.net>, "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, 'Igor Bryskin' <Igor.Bryskin@huawei.com>, "netslices@ietf.org" <netslices@ietf.org>
References: <7AEB3D6833318045B4AE71C2C87E8E172B2CA60E@SJCEML702-CHM.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD007863909953AFA@SJCEML702-CHM.china.huawei.com> <06C389826B926F48A557D5DB5A54C4ED29BB520C@SZXEMI507-MBS.china.huawei.com> <0C72C38E7EBC34499E8A9E7DD0078639099662D6@SJCEML702-CHM.china.huawei.com> <4B13E4DA-DB18-4454-AFC4-57A8B1264CE1@gmail.com> <0C72C38E7EBC34499E8A9E7DD00786390996673B@SJCEML702-CHM.china.huawei.com> <AM2PR07MB09948AF604E3C7869296AEDCF0F30@AM2PR07MB0994.eurprd07.prod.outlook.com> <7625E93C-8E51-4B2F-B28C-FB2A5287FD99@juniper.net> <VI1PR07MB1005262C6FC0CC75EF9D3AA1F0F00@VI1PR07MB1005.eurprd07.prod.outlook.com> <AB42001E-4A0E-4019-A373-D46BAB1ECB78@juniper.net> <001f01d2d93a$0ab65de0$202319a0$@gmail.com> <aadfe32c-b079-8427-a738-dc5ef9e45703@kot-begemot.co.uk> <1A3ED087-9AE3-48C5-B135-D09B0F34AB75@juniper.net> <006601d2d968$99a43f30$ccecbd90$@gmail.com> <53e51b66-6c15-1a49-1ae4-1698a68bb8a2@kot-begemot.co.uk> <88168550-50C9-4489-9FD2-1D9CF652AD0A@juniper.net>
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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On 30/05/17 21:02, Gert Grammel wrote:
> Anton,
>
> I am a bit confused about your last email.
> Lets forget for a moment the source of the definition (was 3GPP)
> "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>
> For more see in line
>
>
>      On 30/05/17 18:17, sebastian wrote:
>      > Hello, Igor, Gert,
>      >
>      > The high-level definition of a 'network slice' in 3GPP should serve as a context and background that is not violated,
>      
>      I do not see any justification for such declarations of sanctity of 3GPP
>      principles.
> → what are 3GPP principles and why should they be sanctuary?
>      
>      For example a slice representing a tenant in a vCPE design has nothing
>      to do with 3GPP. It is clearly a slice. It fits the definition. It is
>      not 3GPP.
> → can you tell me how a tenant in a vCPE design would not fall in above definition of a slice?

My exact point.

>      
>      It is also more in scope for IETF than any of the 3GPP RAN+Radio stuff.
> → there is no RAN mentioned in above definition

No, but the moment we start narrowing down someone immediately tries to 
stick in "5G RAN needs" all over the place into it. We tried it.

Caring about the 5G RAN is 3GPP job. Not ours.

So from my perspective, the test here is - can we formulate a task or 
set of of tasks which do not have 5G RAN in the task definition. Sure, 
RAN can be a use case, but it does not belong anywhere above the use 
case level.

If we can formulate such a set - we have a winner. If not, we can all go 
and do something more interesting instead.

>      
>      Let's walk through it: customer premises networking and configuration
>      (HOMENET), network overlays over WAN to CO (L2VPN, L3VPN, L2TP,
>      L2TPEXT), Datacenter networking - NVO3, SFC, etc. All clearly in-scope,
>      IETF and currently being worked on in 6+ working groups (either complete
>      or active). All of them constitute the components of a slice which has
>      nothing to do with 3GPP.
> → agree, but the definition provided by 3GPP seems to cover those cases

Correct, see above.

>      
>      >   while drilling down into the details of the required suite of protocols and procedures (IETF), across the different layers of the stack.
>      >
>      > Support for the e2e(end-to-end) aspect of a 'network slice' is important to support the usage scenarios that underscore the 5G ecosystem.
>      
>      Correct, however a lot of the e2e is orchestration material. It is not
>      in scope for the IETF. The only part I can see in scope (unless I am
>      missing something) is the model.
> → before concluding what is missing, I would prefer to get a clear and agreed view of what the heck do we mean with "network slice" and what do we not mean by "network slice".
>      
> - Gert
>      A.
>      
>      >
>      > Many thanks.
>      > -Sebastian
>      >
>      > -----Original Message-----
>      > From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor Bryskin
>      > Sent: Tuesday, May 30, 2017 9:21 AM
>      > To: Gert Grammel <ggrammel@juniper.net>; Anton Ivanov <anton.ivanov@kot-begemot.co.uk>; netslices@ietf.org
>      > Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>      >
>      > Gert,
>      >
>      > You seem to like the 3gpp network slice definition for all things it didn’t say anything about. It is a hack of a praise for a definition! :=)
>      >
>      > But in order to work on network slicing in IETF we need some (reasonably) tight definitions to see how we can actually help.
>      > So, when Anton enlists things like:
>      > "
>      >      1. Layer 3 and higher protocols.
>      >      2. Models describing network abstractions "
>      > I find it positive, helpful and constructive.
>      >
>      > Cheers,
>      > Igor
>      >
>      >
>      > -----Original Message-----
>      > From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert Grammel
>      > Sent: Tuesday, May 30, 2017 9:54 AM
>      > To: Anton Ivanov; netslices@ietf.org
>      > Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>      >
>      > Anton,
>      >
>      > We are in agreement that the 3GPP definition is too high level. It is useful however that it stays away from a few arguments that frequently come up in our discussion:
>      > - It doesn't say end-to-end – hence no need to define "The End"
>      > - It doesn't require "dedicated" resources, hence no need to define levels of dedication
>      > - It doesn't use the term "layer", hence no need to define what a Layer would mean
>      > - It doesn't use "owner" to express a technical relation
>      >
>      > I am all for adding meat to above definition but at the same time reluctant to fall back using controversial terminology.
>      >
>      > Gert
>      >
>      >
>      >
>      >
>      >
>      > On 2017-05-30, 14:39, "Netslices on behalf of Anton Ivanov" <netslices-bounces@ietf.org on behalf of anton.ivanov@kot-begemot.co.uk> wrote:
>      >
>      >
>      >
>      >      On 30/05/17 12:44, sebastian wrote:
>      >      > Hello, Gert,
>      >      >
>      >      > Good points.
>      >      >
>      >      > There are various instantiations of a 'network slice' that are likely, based on a diverse array of usage scenarios.
>      >      > These diverse instantiations of a 'network slice', with a corresponding allocation of the required logical or physical resources, should be allowed to suit different usage scenarios that may range from a 'segment' to 'e2e' (end-to-end), in a 5G ecosystem.
>      >      >
>      >      > Hence a generalized definition for the instantiation of a 'network slice' such as the one referred to below (3GPP) is reasonable:
>      >      >      "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>      >
>      >      That is excellent. And too broad. That can be anything from connection
>      >      between two computers and a whole provider network. They both fit this
>      >      rather elastic definition.
>      >
>      >      So, in order for this to be discussed at IETF at all we should limit the
>      >      scope a little bit to one or more subject areas worked on at IETF:
>      >
>      >      1. Layer 3 and higher protocols.
>      >      2. Models describing network abstractions
>      >      3. Interoperability with other IETF efforts.
>      >
>      >      Otherwise, both the definition and the discussion should stay at 3GPP.
>      >      They are good at discussing schemes of world domination, though from a
>      >      point of view of network technology the results are quite often fit for
>      >      Mr Bean, instead of Mr Blofeld (as intended).
>      >
>      >      A.
>      >
>      >      >
>      >      > Many thanks.
>      >      > -Sebastian
>      >      >
>      >      > -----Original Message-----
>      >      > From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Gert Grammel
>      >      > Sent: Tuesday, May 30, 2017 6:17 AM
>      >      > To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; teas@ietf.org
>      >      > Cc: NetSlices@ietf.org
>      >      > Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>      >      >
>      >      > Hi Daniele,
>      >      >
>      >      > See below for more details:
>      >      >
>      >      > On 2017-05-30, 10:17, "Daniele Ceccarelli" <daniele.ceccarelli@ericsson.com> wrote:
>      >      >
>      >      >      Ciao Gert,
>      >      >
>      >      >      Please see in line
>      >      >      Cheers
>      >      >      Daniele
>      >      >
>      >      >
>      >      >      -----Original Message-----
>      >      >      From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>      >      >      Sent: lunedì 29 maggio 2017 15:34
>      >      >      To: Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; sebastian.thalanany@ieee.org; 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>      >      >      Cc: NetSlices@ietf.org
>      >      >      Subject: Re: [Teas] [Netslices] terminology discussion network slicing
>      >      >
>      >      >      Daniele,
>      >      >
>      >      >      Trying to summarize what you're saying: a Network slice is an overlay network with minimum service guarantees, including virtual network functions available in this overlay network.
>      >      >      [>DC] why do you speak about an overlay network? If for example you have a site connected with a lambda to a data center and there you have a number of VNF, that's IMO a slice but there is no overlay. I'd say that there could be an overlay but that's not mandatory.
>      >      > GGR> A Lambda travels through a WDM which is a Multiplexer (see discussion below). So a lambda is in my view an overlay, the multiplexed signal (OMS) being the underlay.
>      >      >
>      >      >
>      >      >
>      >      >      In your text I have issues with "dedicated to a given customer". Whether such construct is dedicated to one or shared among several legal customers shouldn't be of concern for the definition of a Network Slice.
>      >      >      [>DC] Correct, it should be possible to have it dedicated or shared. We just need to make sure that both options are supported.
>      >      > GGR>> So if it can either be dedicated or shared, why mentioning this at all? Is there anything else?
>      >      >
>      >      >      On similar terms, whether a resource (being a NF or transport capacity) is shared or not is a design choice rather than a definition. In particular, Multiplexer by definition share some sort of common capacity irrespective whether it is TDM, Packet, WDM or CDM. So, the nature of multiplexing technique shouldn't be a definition criteria for a Network Slice either.
>      >      >
>      >      >      Another food for thought:
>      >      >      - I would also add that a network slice may use it's own internal addressing scheme isolated from other slices. While this is optional, I would expect it to be used quite often.
>      >      >      [>DC] agree. Ala VPN.
>      >      >
>      >      >      - Why is it necessary to dedicate resources to a "Network Slice" at all? If e.g. a firewall NFV is in the DC and communicates over the Internet with a CPE (both belonging to a single owner) it would not fulfil the criteria of dedicated resource (Internet after all isn't dedicated), but it still looks pretty much like a "network slice".
>      >      >
>      >      >      [>DC] Think of remote surgery...wouldn't you want every single part of the end to end network from the doctor's hands to the scalpel being totally dedicated? :) ...and in that case I don't think the packets would go through the internet
>      >      > GGR>> There are a few issues here:
>      >      > 1)	this example looks a bit out-dated to me. There is only a one-to-one relationship between doctor and patient. This is what I would call a classical client-server model with protected resources. Ask for SONET leased line circuits if this is what a "slice" would mean. In defining what constitutes a slice you would also have to think about what constitutes a "doctor-slice" and what would be a "patient-slice"? (assuming responsible health care to avoid sarcastic interpretation)
>      >      > 2)	The question asked in my earlier email is whether the packets *must* go through a dedicated resource to call the thing "slice". In other words, if a thing that uses a non-dedicated "underlay" resource like the Internet can be called "slice" too? It is puzzling to me why the definition of "slice" would need any dedicated resource at all. It is in the end an implementers choice how much dedicated equipment is needed to provide a service. So why a slice has to use "dedicated resources", and what kind of "dedication" is meant? (See our earlier discussion about WDM)? Take your mobile as an example. It supports telephony and email. Those are different apps, potentially running in different VMs.
>      >      > a.	Is your phone a shared device or a dedicated one?
>      >      > b.	does using different apps means to use a different slices?
>      >      > c.	If you write emails to different recipients, would that qualify your email to be "dedicated", hence a different slice, just because they are in different address books?
>      >      > d.	If you switch from 3G to VoIP, does it mean to switch the slice, even if it is the same app?
>      >      >
>      >      > GGR> My thinking is that the definition of "slice" needs to make practical sense. The 3GPP definition is probably a bit too high level but makes sense to me:
>      >      >      "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>      >      >
>      >      >      Gert
>      >      >
>      >      >      On 2017-05-29, 11:01, "Teas on behalf of Daniele Ceccarelli" <teas-bounces@ietf.org on behalf of daniele.ceccarelli@ericsson.com> wrote:
>      >      >
>      >      >          Hi Sebastian, Jeff, Igor, all,
>      >      >
>      >      >          I understand Jeff and Igor agree on the fact that a network slice does not necessarily include resources in the radio segment/domain and in the packet core one.
>      >      >          An example could be an enterprise with dedicated resources in the "transport" segment (e.g. VPN, VN and TE-tunnels) that connect the customer premises to a data center where a number of VNF (e.g. firewall, nat, dpi) is dedicated to that given customer.
>      >      >          My personal opinion is that this should be considered a network slice.
>      >      >
>      >      >          The definition of network slice should allow for this scenario and mostly should clearly state whether this is included or not.
>      >      >
>      >      >          Sebastian, I don't understand if your statement:
>      >      >          " The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains."
>      >      >          implies that there must be a radio and a core segment in order to have a slice.
>      >      >
>      >      >          BR
>      >      >          Daniele
>      >      >
>      >      >
>      >      >          -----Original Message-----
>      >      >          From: sebastian [mailto:comscape@gmail.com]
>      >      >          Sent: domenica 28 maggio 2017 07:12
>      >      >          To: 'Igor Bryskin' <Igor.Bryskin@huawei.com>; 'Jeff Tantsura' <jefftant.ietf@gmail.com>; 'qiangli (D)' <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; 'Leeyoung' <leeyoung@huawei.com>; teas@ietf.org
>      >      >          Cc: NetSlices@ietf.org
>      >      >          Subject: RE: [Netslices] [Teas] terminology discussion network slicing
>      >      >
>      >      >          Hello, Jeff,
>      >      >
>      >      >          Agree with your view that the scope (core and/or radio layer) of a 'network slice' could vary depending on the triggers for instantiating the 'network slice'.
>      >      >
>      >      >          On the other hand the instantiation of a 'network slice' may also be e2e (end-to-end), such as in device roaming scenarios, or in the case of vertical services that span different service providers.
>      >      >
>      >      >          The span of a 'network slice' is only limited by the availability of resources and appropriate policies (e.g. SLAs), independent of whether those resources are in the core network layer or in the radio network layer.
>      >      >
>      >      >          The management and orchestration of resources should be capable of instantiating a 'network slice' with an e2e (end-to-end) scope, where the scope could be between two devices, connected across intervening radio networks and core networks that may belong to the same or different administrative domains.
>      >      >
>      >      >          Many thanks.
>      >      >          -Sebastian
>      >      >
>      >      >
>      >      >          -----Original Message-----
>      >      >          From: Netslices [mailto:netslices-bounces@ietf.org] On Behalf Of Igor Bryskin
>      >      >          Sent: Wednesday, May 24, 2017 7:56 AM
>      >      >          To: Jeff Tantsura <jefftant.ietf@gmail.com>; qiangli (D) <qiangli3@huawei.com>; Daniele Ceccarelli <daniele.ceccarelli@ericsson.com>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org
>      >      >          Cc: NetSlices@ietf.org
>      >      >          Subject: Re: [Netslices] [Teas] terminology discussion network slicing
>      >      >
>      >      >          Thanks Jeff,
>      >      >
>      >      >          I am glad we are in sync.
>      >      >
>      >      >          Igor
>      >      >
>      >      >          -----Original Message-----
>      >      >          From: Jeff Tantsura [mailto:jefftant.ietf@gmail.com]
>      >      >          Sent: Wednesday, May 24, 2017 8:45 AM
>      >      >          To: Igor Bryskin; qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >      >          Cc: NetSlices@ietf.org
>      >      >          Subject: Re: [Teas] terminology discussion network slicing
>      >      >
>      >      >          +1 Igor
>      >      >
>      >      >          From transport side (L0-L3) we need to expose set of API’s that would allow to request a set of resources (a slice) either virtualized of physical that meet the constrains as requested by the business logic. Radio, while would definitely be one of most important use cases, would not be exclusively for radio use only. Any network management/ orchestration layer ideally should be able to use same set of API’s to request an e2e service.
>      >      >
>      >      >          Cheers,
>      >      >          Jeff
>      >      >
>      >      >
>      >      >          On 5/24/17, 05:26, "Teas on behalf of Igor Bryskin" <teas-bounces@ietf.org on behalf of Igor.Bryskin@huawei.com> wrote:
>      >      >
>      >      >              Hi Cristina,
>      >      >
>      >      >              I didn’t say that ns has nothing to do with radio. I said that ns *may* have nothing to do with radio, i.e. may support/enable network architectures that do not involve radio necessarily.
>      >      >
>      >      >              Igor
>      >      >
>      >      >              -----Original Message-----
>      >      >              From: qiangli (D)
>      >      >              Sent: Wednesday, May 24, 2017 5:05 AM
>      >      >              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >      >              Cc: NetSlices@ietf.org
>      >      >              Subject: 答复: [Teas] terminology discussion network slicing
>      >      >
>      >      >              Hi Igor,
>      >      >
>      >      >              I share the same opinion on 5G and network slicing, but can't see the relation between this opinion and your conclusion that ns has nothing to do with radio.
>      >      >
>      >      >              Best regards,
>      >      >
>      >      >              Cristina QIANG
>      >      >
>      >      >
>      >      >              -----邮件原件-----
>      >      >              发件人: Igor Bryskin
>      >      >              发送时间: 2017年5月20日 23:50
>      >      >              收件人: qiangli (D); Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >      >              抄送: NetSlices@ietf.org
>      >      >              主题: RE: [Teas] terminology discussion network slicing
>      >      >
>      >      >              Hi Cristina,
>      >      >
>      >      >              People whose opinion I respect very much told me that even the 3GPP network slicing definition and effort is not 5G specific.  Network slicing is viewed as an important capability of 5G, but it could serve other architectures.
>      >      >
>      >      >              Cheers,
>      >      >              Igor
>      >      >
>      >      >              -----Original Message-----
>      >      >              From: qiangli (D)
>      >      >              Sent: Saturday, May 20, 2017 5:27 AM
>      >      >              To: Igor Bryskin; Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >      >              Cc: NetSlices@ietf.org
>      >      >              Subject: 答复: [Teas] terminology discussion network slicing
>      >      >
>      >      >              Hi Igor,
>      >      >
>      >      >              I have different opinion on " Network slicing may have nothing to do with radio".
>      >      >              IMO, network slicing should be a resource-oriented management mode. The end-to-end network slice (from UE to server/other UE) of course involves the radio resource, usually we use the word "RAN-radio access network" rather than simply say "radio". The Frequency band, time, code, equipment/site, and software are a number of dimensions, in which RAN resources can be isolated [Online available http://www.huawei.com/en/industry-insights/mbb-2020/trends-insights/5g-service-guaranteed-network-slicing-whitepaper].
>      >      >
>      >      >              Best regards,
>      >      >
>      >      >              Qiang, Li (Cristina)
>      >      >              NetLab, Huawei
>      >      >
>      >      >
>      >      >              -----邮件原件-----
>      >      >              发件人: Netslices [mailto:netslices-bounces@ietf.org] 代表 Igor Bryskin
>      >      >              发送时间: 2017年5月20日 6:12
>      >      >              收件人: Daniele Ceccarelli; Leeyoung; teas@ietf.org
>      >      >              抄送: NetSlices@ietf.org
>      >      >              主题: Re: [Netslices] [Teas] terminology discussion network slicing
>      >      >
>      >      >              Hi Danielle,
>      >      >
>      >      >              Network slicing may have nothing to do with radio. 5g is just a big reason as to why the interest/focus is back on network slicing, which is a very old concept. I don't think that anyone is arguing with what you wrote. The questions are:
>      >      >              a) how do you manage these "pieces"?
>      >      >              b) what policy infrastructure should be put in place?
>      >      >              c) how do you ensure their separation or, conversely, the degree of resource sharing?
>      >      >              d) why exactly legacy VPNs are not good enough?
>      >      >
>      >      >              Cheers,
>      >      >              Igor
>      >      >
>      >      >
>      >      >
>      >      >
>      >      >              -----Original Message-----
>      >      >              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
>      >      >              Sent: Friday, May 19, 2017 4:19 PM
>      >      >              To: Leeyoung; teas@ietf.org
>      >      >              Cc: NetSlices@ietf.org
>      >      >              Subject: Re: [Teas] terminology discussion network slicing
>      >      >
>      >      >              Hi Young, all,
>      >      >
>      >      >              i agree with your conclusion but would like to clarify one thing that IMO got lost in the discussion since its beginning.
>      >      >
>      >      >              The 3GPP definition says:
>      >      >              "A set of network functions and the resources for these network functions which are arranged and configured, forming a complete logical network to meet certain network characteristics."
>      >      >
>      >      >              This means that a network slice IS NOT a VPN or a TE Tunnel.
>      >      >              A network slice is "something" (netslices and 3GPP will define what this something is) that is composed by a "piece" in the RADIO domain, a "piece" in the CLOUD domain, a "piece" in the TRANSPORT domain, plus possible other pieces in possible other domains.
>      >      >
>      >      >              The word "transport" can be misleading here since one could think of transport technologies (e.g. WDM, OTN), but what I'm referring to as TRANSPORT DOMAIN is that part of the network that is used to carry a packet between two other domains.
>      >      >              In order to have a slice, that portion of the transport domain needs to be engineered, hence it is all about building a TE entity and stitching services to such entity. This is what is in the ACTN scope.
>      >      >
>      >      >              My very personal opinion is that whatever belongs to the transport domain belongs to IETF (and is already being addressed), while the rest is a dangerous duplication of concepts standardized is other SDOs...but this is another discussion that doesn't fit here.
>      >      >
>      >      >              BR
>      >      >              Daniele
>      >      >
>      >      >
>      >      >              -----Original Message-----
>      >      >              From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Leeyoung
>      >      >              Sent: venerdì 19 maggio 2017 15:15
>      >      >              To: teas@ietf.org
>      >      >              Cc: NetSlices@ietf.org
>      >      >              Subject: Re: [Teas] terminology discussion network slicing
>      >      >
>      >      >              Hi,
>      >      >
>      >      >              Lou is right. There is a dedicated email list for the discussion of "network slicing (cc'ed)" and the discussion about what that term means should be held on that list.
>      >      >
>      >      >              We have used similar language in draft-ietf-teas-actn-framework right from the
>      >      >              00 version. Recent changes have been an attempt to clarify what the terminology means in the context of ACTN. We are not trying to define or redefine "network slicing" in the ACTN document, but are trying to make it clear how ACTN works.
>      >      >
>      >      >              Therefore I propose the following resolution:
>      >      >
>      >      >              1. All discussion of the general applicability and definition of "network slicing" is held on the netslices mailing list.
>      >      >
>      >      >              2. We adopt Adrian's suggestion to explain that the scope of the definition of the terms used in the ACTN framework is limited to ACTN. That means effectively that if there are components of a wider definition of network slicing that are not supported by ACTN, that will be OK.
>      >      >
>      >      >              I propose to post an updated version in the next few days and I believe that will allow this draft to move ahead without being blocked by the discussion in netslices. Once the IETF has a stable definition of network slicing we can return and see how ACTN is applicable to that definition an whether more wok is need (in a separate draft).
>      >      >
>      >      >              Thanks,
>      >      >              Young
>      >      >
>      >      >              -----Original Message-----
>      >      >              From: Lou Berger [mailto:lberger@labn.net]
>      >      >              Sent: Tuesday, May 16, 2017 8:35 AM
>      >      >              To: Igor Bryskin <Igor.Bryskin@huawei.com>; Belotti, Sergio (Nokia - IT/Vimercate) <sergio.belotti@nokia.com>; Gert Grammel <ggrammel@juniper.net>; Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>      >      >              Subject: Re: [Teas] terminology discussion network slicing
>      >      >
>      >      >              Perhaps it's time to bring the discussion to the slicing list and report back their reaponse....
>      >      >
>      >      >              Lou
>      >      >
>      >      >
>      >      >              On May 16, 2017 8:31:19 AM Igor Bryskin <Igor.Bryskin@huawei.com> wrote:
>      >      >
>      >      >              > Hi Sergio,
>      >      >              >
>      >      >              > I would also like to hear more from network slicing experts.
>      >      >              >
>      >      >              > My understanding is that the difference in the separation (in terms of
>      >      >              > control and data planes, security, etc.). For example, traditional BGP
>      >      >              > based L3 VPNs (that use provider's common control plane for their
>      >      >              > management and IP/MPLS TE tunnels to inter-connect their PEs) will
>      >      >              > probably not be able guarantee for the clients msec range connectivity
>      >      >              > setup times required by 5g, while provided by the same provider fully
>      >      >              > separated/genuinely private IP/MPLS networks (that do not share
>      >      >              > IP/MPLS control plane and infrastructure, whose network topology is
>      >      >              > supported by separate L0/L1 connections) hopefully will be able to
>      >      >              > provide such guarantees. Therefore, I define layer network slices as
>      >      >              > dynamically managed fully isolated in control and data planes private
>      >      >              > TE layer networks, which may share one or more underlying server layer networks.
>      >      >              >
>      >      >              >
>      >      >              > Cheers,
>      >      >              > Igor
>      >      >              >
>      >      >              >
>      >      >              >
>      >      >              >
>      >      >              > -----Original Message-----
>      >      >              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Belotti, Sergio
>      >      >              > (Nokia - IT/Vimercate)
>      >      >              > Sent: Tuesday, May 16, 2017 6:08 AM
>      >      >              > To: Gert Grammel; Leeyoung; teas@ietf.org; adrian@olddog.co.uk
>      >      >              > Subject: Re: [Teas] terminology discussion network slicing
>      >      >              >
>      >      >              > Hi Gert,
>      >      >              >
>      >      >              > "Thinking a bit about it I came to the point where "VPN" and "network
>      >      >              > slices" seem to describe the same entity or at least a "network slice"
>      >      >              > being a VPN of VPNs?"
>      >      >              >
>      >      >              > I share completely your conclusion , I'd like if someone can explain
>      >      >              > if a difference really exists .
>      >      >              >
>      >      >              > Thanks
>      >      >              > Sergio
>      >      >              >
>      >      >              >
>      >      >              > -----Original Message-----
>      >      >              > From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of Gert Grammel
>      >      >              > Sent: Monday, May 15, 2017 7:02 PM
>      >      >              > To: Leeyoung <leeyoung@huawei.com>; teas@ietf.org; adrian@olddog.co.uk
>      >      >              > Subject: Re: [Teas] terminology discussion network slicing
>      >      >              >
>      >      >              > Leeyoung,
>      >      >              >
>      >      >              > Thank you for taking a stab on this. Usually when getting to a
>      >      >              > definition, I try to establish what kind of existing constructs would
>      >      >              > fall under the definition. If my understanding is correct, the
>      >      >              > following list of constructs would all satisfy the definition somehow.
>      >      >              > - A TDM network with a p2p TDM connection
>      >      >              > - A PSC capable network carrying a p2p circuit (such as EPL/EVPL)
>      >      >              > - An MPLS LSP using a traffic engineered IP network
>      >      >              > - A L2VPN using a traffic engineered MPLS network
>      >      >              > - A L3VPN using a traffic engineered IP network
>      >      >              > - A TCP connection using a traffic engineered IP network
>      >      >              > - Different QoS classes in an IP network
>      >      >              >
>      >      >              > Thinking a bit about it I came to the point where "VPN" and "network
>      >      >              > slices" seem to describe the same entity or at least a "network slice"
>      >      >              > being a VPN of VPNs?
>      >      >              >
>      >      >              > Gert
>      >      >              >
>      >      >              >
>      >      >              > On 2017-05-17, 16:44, "Teas on behalf of Leeyoung"
>      >      >              > <teas-bounces@ietf.org on behalf of leeyoung@huawei.com> wrote:
>      >      >              >
>      >      >              >     Hi Adrian and others,
>      >      >              >
>      >      >              >     We'd like cross check with you on some terminology we introduced newly. Any
>      >      >              >     comment on these terms will be greatly appreciated.
>      >      >              >
>      >      >              >     We introduced 'network slicing' as follows:
>      >      >              >
>      >      >              >             Network slicing is a collection of resources
>      >      >              >             that are used to establish logically dedicated virtual networks
>      >      >              >             over TE networks. It allows a network provider to provide
>      >      >              >             dedicated virtual networks for application/customer over a
>      >      >              >             common network infrastructure. The logically dedicated
>      >      >              >             resources are a part of the larger common network
>      >      >              >             infrastructures that are shared among various network slice
>      >      >              >             instances which are the end-to-end realization of network
>      >      >              >             slicing, consisting of the combination of physically or
>      >      >              >             logically dedicated resources.
>      >      >              >
>      >      >              >
>      >      >              >     Thanks.
>      >      >              >     Young and Daniele
>      >      >              >     -----Original Message-----
>      >      >              >     From: Leeyoung
>      >      >              >     Sent: Friday, May 05, 2017 1:41 PM
>      >      >              >     To: teas@ietf.org
>      >      >              >     Subject: RE: [Teas] I-D Action:
>      >      >              > draft-ietf-teas-actn-framework-05.txt
>      >      >              >
>      >      >              >     Hi,
>      >      >              >
>      >      >              >     This update is intended to incorporate the comments from the last WG
>      >      >              >     meeting and any pending issues. We also have taken the global editorial
>      >      >              >     changes to make it consistent through the document. Major changes are:
>      >      >              >
>      >      >              >     - Inclusion of "network slicing" definition from ACTN perspective (in the
>      >      >              >     terminology section)
>      >      >              >     - Added virtual network service (VNS) section (Section 3) to define types
>      >      >              >     of VNS.
>      >      >              >     - Incorporated "orchestration" (service/network) mapping to ACTN
>      >      >              >     architecture (See Section 5.2)
>      >      >              >     - Created a new section 6 (Topology Abstraction Method) where we imported
>      >      >              >     some texts from ACTN abstraction method
>      >      >              >     https://tools.ietf.org/html/draft-lee-teas-actn-abstraction-01
>      >      >              >     - Added Appendices A & B to discuss example deployment scenarios such as
>      >      >              >     example of MDSC and PNC functions integrated in Service/Network
>      >      >              >     Orchestrator (Appendix A) and example of IP + Optical network with L3VPN
>      >      >              >     service (Appendix B)
>      >      >              >
>      >      >              >     In regard to ACTN abstraction method draft, we are going to keep it as a
>      >      >              >     separate draft and use this document to elaborate other aspects not
>      >      >              >     imported to the framework document.
>      >      >              >
>      >      >              >     The following diff pointer will help you see the changes with this revision:
>      >      >              >
>      >      >              > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>      >      >              >
>      >      >              >     The co-authors believe that the document is ready for WG LC. Any
>      >      >              >     changes/comments will be appreciated.
>      >      >              >
>      >      >              >     Thanks & Best regards,
>      >      >              >     Young & Daniele (on behalf of other co-authors/contributors)
>      >      >              >
>      >      >              >     -----Original Message-----
>      >      >              >     From: Teas [mailto:teas-bounces@ietf.org] On Behalf Of internet-drafts@ietf.org
>      >      >              >     Sent: Friday, May 05, 2017 10:41 AM
>      >      >              >     To: i-d-announce@ietf.org
>      >      >              >     Cc: teas@ietf.org
>      >      >              >     Subject: [Teas] I-D Action: draft-ietf-teas-actn-framework-05.txt
>      >      >              >
>      >      >              >
>      >      >              >     A New Internet-Draft is available from the on-line Internet-Drafts directories.
>      >      >              >     This draft is a work item of the Traffic Engineering Architecture and
>      >      >              >     Signaling of the IETF.
>      >      >              >
>      >      >              >             Title           : Framework for Abstraction and Control of Traffic
>      >      >              >             Engineered Networks
>      >      >              >             Authors         : Daniele Ceccarelli
>      >      >              >                               Young Lee
>      >      >              >     	Filename        : draft-ietf-teas-actn-framework-05.txt
>      >      >              >     	Pages           : 41
>      >      >              >     	Date            : 2017-05-05
>      >      >              >
>      >      >              >     Abstract:
>      >      >              >        Traffic Engineered networks have a variety of mechanisms to
>      >      >              >        facilitate the separation of the data plane and control plane. They
>      >      >              >        also have a range of management and provisioning protocols to
>      >      >              >        configure and activate network resources.  These mechanisms
>      >      >              >        represent key technologies for enabling flexible and dynamic
>      >      >              >        networking.
>      >      >              >
>      >      >              >        Abstraction of network resources is a technique that can be applied
>      >      >              >        to a single network domain or across multiple domains to create a
>      >      >              >        single virtualized network that is under the control of a network
>      >      >              >        operator or the customer of the operator that actually owns
>      >      >              >        the network resources.
>      >      >              >
>      >      >              >        This document provides a framework for Abstraction and Control of
>      >      >              >        Traffic Engineered Networks (ACTN).
>      >      >              >
>      >      >              >
>      >      >              >
>      >      >              >     The IETF datatracker status page for this draft is:
>      >      >              >     https://datatracker.ietf.org/doc/draft-ietf-teas-actn-framework/
>      >      >              >
>      >      >              >     There are also htmlized versions available at:
>      >      >              >     https://tools.ietf.org/html/draft-ietf-teas-actn-framework-05
>      >      >              >
>      >      >              > https://datatracker.ietf.org/doc/html/draft-ietf-teas-actn-framework-0
>      >      >              > 5
>      >      >              >
>      >      >              >     A diff from the previous version is available at:
>      >      >              >
>      >      >              > https://www.ietf.org/rfcdiff?url2=draft-ietf-teas-actn-framework-05
>      >      >              >
>      >      >              >
>      >      >              >     Please note that it may take a couple of minutes from the time of
>      >      >              >     submission until the htmlized version and diff are available at tools.ietf.org.
>      >      >              >
>      >      >              >     Internet-Drafts are also available by anonymous FTP at:
>      >      >              >     ftp://ftp.ietf.org/internet-drafts/
>      >      >              >
>      >      >              >     _______________________________________________
>      >      >              >     Teas mailing list
>      >      >              >     Teas@ietf.org
>      >      >              >     https://www.ietf.org/mailman/listinfo/teas
>      >      >              >
>      >      >              >     _______________________________________________
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>      >      >              >
>      >      >              > _______________________________________________
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>      >      >
>      >      >
>      >      >              _______________________________________________
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>      >      >
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To: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>, "sebastian.thalanany@ieee.org" <sebastian.thalanany@ieee.org>, 'Igor Bryskin' <Igor.Bryskin@huawei.com>, "netslices@ietf.org" <netslices@ietf.org>
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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From: <mohamed.boucadair@orange.com>
To: Anton Ivanov <anton.ivanov@kot-begemot.co.uk>, "netslices@ietf.org" <netslices@ietf.org>
Thread-Topic: [Netslices] [Teas] terminology discussion network slicing
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Date: Wed, 31 May 2017 12:29:33 +0000
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From: GENG Liang <liang.geng@hotmail.com>
To: "mohamed.boucadair@orange.com" <mohamed.boucadair@orange.com>, "Anton Ivanov" <anton.ivanov@kot-begemot.co.uk>, "netslices@ietf.org" <netslices@ietf.org>
Thread-Topic: Re: [Netslices] [Teas] terminology discussion network slicing
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Subject: Re: [Netslices] [Teas] terminology discussion network slicing
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