From nobody Tue Sep 9 13:47:19 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1C7BF1A0204 for ; Tue, 9 Sep 2014 13:47:17 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2FOlcOdO4QzJ for ; Tue, 9 Sep 2014 13:47:14 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 82A8B1A0199 for ; Tue, 9 Sep 2014 13:46:58 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml403-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJF99830; Tue, 09 Sep 2014 20:46:55 +0000 (GMT) Received: from DFWEML702-CHM.china.huawei.com (10.193.5.72) by lhreml403-hub.china.huawei.com (10.201.5.217) with Microsoft SMTP Server (TLS) id 14.3.158.1; Tue, 9 Sep 2014 21:46:54 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml702-chm ([10.193.5.72]) with mapi id 14.03.0158.001; Tue, 9 Sep 2014 13:46:46 -0700 From: Leeyoung To: "actn@ietf.org" Thread-Index: Ac/MbyrXjHfeDlkgQ6e5rQLs3mepDg== Date: Tue, 9 Sep 2014 20:46:45 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2E1E0@dfweml706-chm> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2E1E0dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/QYKr4X8uv5SyA4nD7ZWLJHj43q8 Subject: [Actn] (no subject) X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Sep 2014 20:47:17 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2E1E0dfweml706chm_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2E1E0dfweml706chm_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although thes= e technologies provide significant benefits within a single domain control = boundary, they do not meet the growing need for transport network virtualization in multi-domain transport networks. More and more <= /span> network operators are building and = operating on multi-domain transport networks. These domains (collections of= links and nodes) may be each of a different technology, administrative zones, or vendor-specific islands. Establishment of end-to-= end connections spanning multiple domains is a perpetual problem for operat= ors because of both operational concerns (control plane and management plan= e) and interoperability issues (control plane and data plane).  Due to these issues, new services that requir= e connections that traverse multiple domains need significant planning and = often manual operations to interface different vendor equipment and technol= ogy.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C2E1E0dfweml706chm_-- From nobody Tue Sep 9 13:53:08 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D34151A01D8 for ; Tue, 9 Sep 2014 13:53:06 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PCV9GnCnQ3wE for ; Tue, 9 Sep 2014 13:53:03 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7E1391A0104 for ; Tue, 9 Sep 2014 13:53:02 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml403-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMJ52720; Tue, 09 Sep 2014 20:53:00 +0000 (GMT) Received: from DFWEML701-CHM.china.huawei.com (10.193.5.50) by lhreml403-hub.china.huawei.com (10.201.5.217) with Microsoft SMTP Server (TLS) id 14.3.158.1; Tue, 9 Sep 2014 21:53:00 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml701-chm ([10.193.5.50]) with mapi id 14.03.0158.001; Tue, 9 Sep 2014 13:52:45 -0700 From: Leeyoung To: Leeyoung , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVQ== Date: Tue, 9 Sep 2014 20:52:44 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2E202dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/OswN1tePVbS7wKlKh_6BBVOdB8Y Subject: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 09 Sep 2014 20:53:07 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2E202dfweml706chm_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2E202dfweml706chm_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C2E202dfweml706chm_-- From nobody Wed Sep 10 20:48:17 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 46F451A03AD for ; Wed, 10 Sep 2014 20:48:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.852 X-Spam-Level: X-Spam-Status: No, score=-5.852 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3Q4eQOmiA6JX for ; Wed, 10 Sep 2014 20:48:11 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id DA94A1A03AA for ; Wed, 10 Sep 2014 20:48:10 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml402-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMK79926; Thu, 11 Sep 2014 03:48:09 +0000 (GMT) Received: from SZXEML461-HUB.china.huawei.com (10.82.67.204) by lhreml402-hub.china.huawei.com (10.201.5.241) with Microsoft SMTP Server (TLS) id 14.3.158.1; Thu, 11 Sep 2014 04:48:07 +0100 Received: from szxeml556-mbs.china.huawei.com ([169.254.4.229]) by szxeml461-hub.china.huawei.com ([10.82.67.204]) with mapi id 14.03.0158.001; Thu, 11 Sep 2014 11:47:57 +0800 From: Dhruv Dhody To: Leeyoung , Leeyoung , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+Vw Date: Thu, 11 Sep 2014 03:47:56 +0000 Message-ID: <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> Accept-Language: en-GB, zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.18.146.248] Content-Type: multipart/alternative; boundary="_000_23CE718903A838468A8B325B80962F9B865DED8Cszxeml556mbschi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/CrTtxGsyTu0B2WNuSRFzkoX7Z6Y Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Sep 2014 03:48:16 -0000 --_000_23CE718903A838468A8B325B80962F9B865DED8Cszxeml556mbschi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation Hope you find them useful in making the charter text crisp. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_23CE718903A838468A8B325B80962F9B865DED8Cszxeml556mbschi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

* You may want to do charter text formatti= ng in RFC text format taking care of word-wraps and indentation

Hope you find them useful in making the ch= arter text crisp.

 

Dhruv

 

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_23CE718903A838468A8B325B80962F9B865DED8Cszxeml556mbschi_-- From nobody Thu Sep 11 08:17:36 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 353451A6FB7 for ; Thu, 11 Sep 2014 08:17:33 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HLS5_G23rxCe for ; Thu, 11 Sep 2014 08:17:24 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B1E5D1A02BE for ; Thu, 11 Sep 2014 08:17:23 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml403-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJH87491; Thu, 11 Sep 2014 15:17:22 +0000 (GMT) Received: from DFWEML703-CHM.china.huawei.com (10.193.5.130) by lhreml403-hub.china.huawei.com (10.201.5.217) with Microsoft SMTP Server (TLS) id 14.3.158.1; Thu, 11 Sep 2014 16:17:21 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml703-chm.china.huawei.com ([169.254.5.198]) with mapi id 14.03.0158.001; Thu, 11 Sep 2014 08:17:11 -0700 From: Leeyoung To: Dhruv Dhody , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+A= Date: Thu, 11 Sep 2014 15:17:11 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> In-Reply-To: <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2ECCBdfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/_fNownu00iUG4H4Db3wLncD5XNM Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Sep 2014 15:17:33 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2ECCBdfweml706chm_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Dhruv, Thanks for providing your valuable comment. Please see inline for my response. Thanks. Young From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2ECCBdfweml706chm_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Dhruv,

 

Thanks for providing y= our valuable comment.

 

Please see inline for = my response. Thanks.

 

Young

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C2ECCBdfweml706chm_-- From nobody Thu Sep 11 09:08:51 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7B7B31A0410 for ; Thu, 11 Sep 2014 09:08:47 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.551 X-Spam-Level: X-Spam-Status: No, score=-3.551 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-1.652] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kX4v8jbTf8ne for ; Thu, 11 Sep 2014 09:08:40 -0700 (PDT) Received: from smtp-us.alcatel-lucent.com (us-hpatc-esg-01.alcatel-lucent.com [135.245.18.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 079F01A8738 for ; Thu, 11 Sep 2014 09:08:40 -0700 (PDT) Received: from us70uusmtp3.zam.alcatel-lucent.com (unknown [135.5.2.65]) by Websense Email Security Gateway with ESMTPS id AA39A92C0F8D4; Thu, 11 Sep 2014 16:08:29 +0000 (GMT) Received: from US70UWXCHHUB01.zam.alcatel-lucent.com (us70uwxchhub01.zam.alcatel-lucent.com [135.5.2.48]) by us70uusmtp3.zam.alcatel-lucent.com (GMO) with ESMTP id s8BG8RnY032330 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Thu, 11 Sep 2014 12:08:32 -0400 Received: from US70UWXCHMBA05.zam.alcatel-lucent.com ([169.254.10.167]) by US70UWXCHHUB01.zam.alcatel-lucent.com ([135.5.2.48]) with mapi id 14.02.0247.003; Thu, 11 Sep 2014 12:08:31 -0400 From: "Varma, Eve L (Eve)" To: Leeyoung , Dhruv Dhody , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAABNQAA== Date: Thu, 11 Sep 2014 16:08:30 +0000 Message-ID: <6D32668528F93D449A073F45707153D82C4BE1D7@US70UWXCHMBA05.zam.alcatel-lucent.com> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [135.5.27.16] Content-Type: multipart/alternative; boundary="_000_6D32668528F93D449A073F45707153D82C4BE1D7US70UWXCHMBA05z_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/89CldmVYY0J3zT5TC35e5SUcE4g Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Sep 2014 16:08:47 -0000 --_000_6D32668528F93D449A073F45707153D82C4BE1D7US70UWXCHMBA05z_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, Just a quick terminology comment - the wording below infers OTN is only L1,= when it is both L1 and L0 :) So I would suggest to reword as "This implie= s that at least the following transport networks are in scope of the discus= sion of this draft: Layer 1 (L1) and Layer 0 (L0) optical networks (e.g., O= TN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other emerging network tech= nologies with connection-oriented behavior". Best regards, Eve From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Thursday, September 11, 2014 11:17 AM To: Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Dhruv, Thanks for providing your valuable comment. Please see inline for my response. Thanks. Young From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and= protection, and - Provide traffic engineering mechanism via centralized path computa= tion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks t= o enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use case= s. - Requirements to support APIs/protocols, encoding languages, and da= ta models - Gap analysis of existing IETF and other protocols, encoding langua= ges and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_6D32668528F93D449A073F45707153D82C4BE1D7US70UWXCHMBA05z_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

 

Just a quick terminology comme= nt - the wording below infers OTN is only L1, when it is both L1 and L0 J  So I would suggest to reword as ̶= 0;This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) and Layer 0 (L0) optic= al networks (e.g., OTN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other e= merging network technologies with connection-oriented behavior”.=

 

Best regards,

Eve

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Thursday, September 11, 2014 11:17 AM
To: Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dhruv,

 

Thanks for providing y= our valuable comment.

 

Please see inline for = my response. Thanks.

 

Young

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-        Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;  Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;  Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;  Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;  Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o   Synchronization of network resources view across physical domain= controls and virtual network control.

o   Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_6D32668528F93D449A073F45707153D82C4BE1D7US70UWXCHMBA05z_-- From nobody Thu Sep 11 09:34:10 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 290511ACC85 for ; Thu, 11 Sep 2014 09:33:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.078 X-Spam-Level: X-Spam-Status: No, score=-0.078 tagged_above=-999 required=5 tests=[BAYES_20=-0.001, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0ZJH8rnLG47Z for ; Thu, 11 Sep 2014 09:33:53 -0700 (PDT) Received: from mail-la0-f43.google.com (mail-la0-f43.google.com [209.85.215.43]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EF0431A8742 for ; Thu, 11 Sep 2014 09:33:52 -0700 (PDT) Received: by mail-la0-f43.google.com with SMTP id gi9so12047133lab.2 for ; Thu, 11 Sep 2014 09:33:51 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:from:date:message-id:subject:to :content-type; bh=Z110nz7jyYoh8Ma3MXgluWYEVXttpB9WgW31bMUDFrc=; b=Q+YioAdJztPwL5UwHCspbPAMbMpR+nxx1cTgoc0JjO5pifMEnJJtfT/JKdHbJbvDW3 EseRvnmhzyN9dyZdjC0R9u7CUhMieP7MEB4SmEvoIs13nKHiiHcP7YAxbFNeImPS4iaS JggDRERJlarHH1AOV0Ytag3NRq8DHoep9Hb1N5Hh4eB8KFcxXagMvw0sT3ivrH1k4Yvi ZtOKIbsaavhciUt4n0n1gb3uog+T1OBd7SExFLkeiF3/zJH37jpVdTRKJzPlOzQIYKQp 4b40U5erZv2wTmX8DOn8J4MCBpiZLCrrYfczlDTBGk0t35GOjXgUEVi8vCnmXD4d2EGn dOrw== X-Gm-Message-State: ALoCoQng+bNV5rhj/hlaGCt3PBMN70Ry+E/3xBUY/iwCP6Tb5Zx2xt2KOfFdX53qFog0RE/s1mOJ X-Received: by 10.152.21.42 with SMTP id s10mr2449729lae.61.1410453231242; Thu, 11 Sep 2014 09:33:51 -0700 (PDT) MIME-Version: 1.0 Received: by 10.112.84.11 with HTTP; Thu, 11 Sep 2014 09:33:31 -0700 (PDT) X-Originating-IP: [72.199.86.35] From: Mike Mossbarger Date: Thu, 11 Sep 2014 09:33:31 -0700 Message-ID: To: actn@ietf.org Content-Type: multipart/alternative; boundary=089e013d175ed22ed80502ccbb2f Archived-At: http://mailarchive.ietf.org/arch/msg/actn/ZC7qk5u8XEXkb_F5HnSUYgwbjo4 Subject: [Actn] Joining the group X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Sep 2014 16:33:58 -0000 --089e013d175ed22ed80502ccbb2f Content-Type: text/plain; charset=UTF-8 Hello All, I am new to this conversation and was thrilled to find it so directly in line with work that I am currently involved in at the Industrial Internet Consortium. We have a use case on Connectivity that many of us are keen to move towards a testbed - the problem is complex. One key factor that must be addressed are roots of trust used for credentialing systems across these different domains. Abstraction in a standard way can be achieved (with some work) but quantifying 'trust' across domain boundaries requires common roots of trust so that cryptographic substantiation of identity is uniform. There is work along the lines of Roots of Trust for Cyber-Physical Systems going on at the Cyber Security Research Alliance although their work is focused on PKI, a cryptosystem that can't support cross-domain trust. Best, Michael Mossbarger Executive Director *ENT Foundation* *Resilient. Global. Identity.mike@ent.net * www.ENT.net 619-794-6677 Mobile --089e013d175ed22ed80502ccbb2f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hello All,

I am new to this conversation and was thrill= ed to find it so directly in line with work that I am currently involved in= at the Industrial Internet Consortium. We have a use case on Connectivity = that many of us are keen to move towards a testbed - the problem is complex= .

One key factor that must be addressed are roots of trust used for= credentialing systems across these different domains. Abstraction in a sta= ndard way can be achieved (with some work) but quantifying 'trust' = across domain boundaries requires common roots of trust so that cryptograph= ic substantiation of identity is uniform. There is work along the lines of = Roots of Trust for Cyber-Physical Systems going on at the Cyber Security Re= search Alliance although their work is focused on PKI, a cryptosystem that = can't support cross-domain trust.

Best,
=
=C2=A0
=
Michael Mo= ssbarger
Executive Director
ENT Foundation
<= /span>
Resilient. Global. Identity.
mike@ent.net

www.ENT.net
619-794-6677 Mobile
--089e013d175ed22ed80502ccbb2f-- From nobody Thu Sep 11 14:56:16 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 093051A0264 for ; Thu, 11 Sep 2014 14:56:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6XWXNAMLr4uM for ; Thu, 11 Sep 2014 14:56:07 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C37F51A0144 for ; Thu, 11 Sep 2014 14:56:05 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml405-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJI07937; Thu, 11 Sep 2014 21:56:04 +0000 (GMT) Received: from DFWEML704-CHM.china.huawei.com (10.193.5.141) by lhreml405-hub.china.huawei.com (10.201.5.242) with Microsoft SMTP Server (TLS) id 14.3.158.1; Thu, 11 Sep 2014 22:56:03 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml704-chm ([10.193.5.141]) with mapi id 14.03.0158.001; Thu, 11 Sep 2014 14:55:54 -0700 From: Leeyoung To: "Varma, Eve L (Eve)" , Dhruv Dhody , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAABNQAIAAYrzA Date: Thu, 11 Sep 2014 21:55:54 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2EEB5@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <6D32668528F93D449A073F45707153D82C4BE1D7@US70UWXCHMBA05.zam.alcatel-lucent.com> In-Reply-To: <6D32668528F93D449A073F45707153D82C4BE1D7@US70UWXCHMBA05.zam.alcatel-lucent.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2EEB5dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/AbpxS2J07mTuKqfxUVNs6cgclzw Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 11 Sep 2014 21:56:13 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2EEB5dfweml706chm_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Eve, Thanks always for being technically correct. I think your wording is fine w= ith me. Best regards, Young From: Varma, Eve L (Eve) [mailto:eve.varma@alcatel-lucent.com] Sent: Thursday, September 11, 2014 11:09 AM To: Leeyoung; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi, Just a quick terminology comment - the wording below infers OTN is only L1,= when it is both L1 and L0 :) So I would suggest to reword as "This implie= s that at least the following transport networks are in scope of the discus= sion of this draft: Layer 1 (L1) and Layer 0 (L0) optical networks (e.g., O= TN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other emerging network tech= nologies with connection-oriented behavior". Best regards, Eve From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Thursday, September 11, 2014 11:17 AM To: Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Dhruv, Thanks for providing your valuable comment. Please see inline for my response. Thanks. Young From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2EEB5dfweml706chm_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Eve,

 

Thanks always for bein= g technically correct. I think your wording is fine with me.

 

Best regards,

Young

 

From: Varma, E= ve L (Eve) [mailto:eve.varma@alcatel-lucent.com]
Sent: Thursday, September 11, 2014 11:09 AM
To: Leeyoung; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi,

 

Just a quick terminology comme= nt - the wording below infers OTN is only L1, when it is both L1 and L0 J  So I would suggest to reword as ̶= 0;This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) and Layer 0 (L0) optic= al networks (e.g., OTN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other e= merging network technologies with connection-oriented behavior”.=

 

Best regards,

Eve

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Thursday, September 11, 2014 11:17 AM
To: Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dhruv,

 

Thanks for providing y= our valuable comment.

 

Please see inline for = my response. Thanks.

 

Young

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C2EEB5dfweml706chm_-- From nobody Thu Sep 11 19:33:01 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 20FE41A01CB for ; Thu, 11 Sep 2014 19:32:59 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.852 X-Spam-Level: X-Spam-Status: No, score=-5.852 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3t7dFzbtlpeR for ; Thu, 11 Sep 2014 19:32:50 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 765911A01B0 for ; Thu, 11 Sep 2014 19:32:49 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml401-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJI20129; Fri, 12 Sep 2014 02:32:48 +0000 (GMT) Received: from SZXEML410-HUB.china.huawei.com (10.82.67.137) by lhreml401-hub.china.huawei.com (10.201.5.240) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 12 Sep 2014 03:32:45 +0100 Received: from szxeml556-mbs.china.huawei.com ([169.254.4.229]) by szxeml410-hub.china.huawei.com ([10.82.67.137]) with mapi id 14.03.0158.001; Fri, 12 Sep 2014 10:32:33 +0800 From: Dhruv Dhody To: Leeyoung , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwA== Date: Fri, 12 Sep 2014 02:32:32 +0000 Message-ID: <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> Accept-Language: en-GB, zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.18.146.248] Content-Type: multipart/mixed; boundary="_004_23CE718903A838468A8B325B80962F9B865DF376szxeml556mbschi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/jsRsOiXJv8IjHfTqrCEUHnycQEk Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 02:32:59 -0000 --_004_23CE718903A838468A8B325B80962F9B865DF376szxeml556mbschi_ Content-Type: multipart/alternative; boundary="_000_23CE718903A838468A8B325B80962F9B865DF376szxeml556mbschi_" --_000_23CE718903A838468A8B325B80962F9B865DF376szxeml556mbschi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_23CE718903A838468A8B325B80962F9B865DF376szxeml556mbschi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 <= /o:p>

 <= /o:p>

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv<= /o:p>

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

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--_004_23CE718903A838468A8B325B80962F9B865DF376szxeml556mbschi_-- From nobody Fri Sep 12 07:16:32 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ADC581A06D8 for ; Fri, 12 Sep 2014 07:16:27 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.977 X-Spam-Level: X-Spam-Status: No, score=-1.977 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BUulKTGK-9e7 for ; Fri, 12 Sep 2014 07:16:16 -0700 (PDT) Received: from mail-lb0-f176.google.com (mail-lb0-f176.google.com [209.85.217.176]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 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Wauters References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> In-Reply-To: <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQFbR/5w7MfuzrVmHnf/H0kLPTq/RAMiIzy9Acbw7dkB3Bxe85ywaYyw Date: Fri, 12 Sep 2014 16:15:57 +0200 Message-ID: To: Dhruv Dhody , Leeyoung , actn@ietf.org Content-Type: multipart/alternative; boundary=e89a8f83a9813583750502deec8f Archived-At: http://mailarchive.ietf.org/arch/msg/actn/we7fTIa4VOk-kZOa-JXWb9Q1yjQ Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 14:16:28 -0000 --e89a8f83a9813583750502deec8f Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Lee, I reviewed the charter and find it good. I have 2 comments Comment 1: In 5th paragraph YOUNG>>=E2=80=9CIt will identify key building components and the correspond= ing interfaces among these components. =E2=80=9C WAUTERS>>=E2=80=9CIt will identify key building components and the correspo= nding interfaces among these components. Key components can be future building block or legacy components existing today=E2=80=9C Comment 2: I don=E2=80=99t have a lot of experience with writing charters, but instead= of =E2=80=9C=E2=80=A6 will work on =E2=80=A6=E2=80=9D isn=E2=80=99t the objective to come to conc= lusions or aim clear recommendations ? Note that my experience with IETF is not large enough to know whether what I state here makes sense. YOUNG>> =E2=80=9CHigh-level architecture that describes the basic building= blocks to enable transport network virtualization to support use cases. WAUTERS>> =E2=80=9C*Propose* *a *high-level architecture =E2=80=A6=E2=80=A6 YOUNG>> =E2=80=9CEvaluation of Information model/data model to support the= use cases. WAUTERS>> =E2=80=9CEvaluate *and agree* on Information model/data model to= support the use cases. YOUNG>> =E2=80=9CRequirements to support APIs/protocols, encoding language= s, and data models WAUTERS>> =E2=80=9C*Collect* requirements to support APIs/protocols, encod= ing languages, and data models YOUNG>>Gap analysis of existing IETF and other protocols, encoding languages and data models to fulfill the requirements. WAUTERS>>*Perform* gap analysis of existing IETF and other protocols, encoding languages and data models to fulfill the requirements. YOUNG>> =E2=80=9CProtocol extensions (if necessary after re-chartering). WAUTERS>> =E2=80=9C*Propose* protocol extensions (if necessary after re-cha= rtering). Regards Nico *From:* Dhruv Dhody [mailto:dhruv.dhody@huawei.com] *Sent:* vrijdag 12 september 2014 4:33 *To:* Leeyoung; actn@ietf.org *Subject:* Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. *From:* Dhruv Dhody *Sent:* Wednesday, September 10, 2014 10:48 PM *To:* Leeyoung; Leeyoung; actn@ietf.org *Subject:* RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Transport networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One definition from the Problem Statement draft ( https://datatracker.ietf.org/doc/draft-leeking-actn-problem-statement/) is as follows. Would this be good enough or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing =E2=80=98i= n the document=E2=80=99/=E2=80=99of this draft=E2=80=99. * =E2=80=9CTransport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and protection, and - Provide traffic engineering mechanism via centralized path computation.=E2=80=9D Term =E2=80=98centralized signaling=E2=80=99 is confusing to me, do you mea= n, the use of NMS? YOUNG>> Yes. We can reword the second point: =E2=80=9CAllow for distributed signaling or an NMS-based centralized signaling for set up=E2=80=A6.=E2=80= =9D [Dhruv]: That works! * =E2=80=9CThe architecture work will lead to requirements for information = models and protocol extensions between the virtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer controllers.=E2=80=9D It would be nice to add =E2=80=9Cmulti-domain coordinator=E2=80=9D with =E2= =80=9Cvirtual network controller=E2=80=9D to explicitly link them together. Also multi-tenant cus= tomer controllers doesn=E2=80=99t convey the intention to have different customer controllers for each tenant, how about=E2=80=A6 =E2=80=9CThe architecture work will lead to requirements for information mo= dels and protocol extensions between the virtual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual network controller and multiple tenant customer controllers.=E2=80=9D YOUNG>> This sounds good to me. Thanks. * =E2=80=9CThe working group will determine if new protocol extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working groups to enhance existing protocols where possible.=E2=80=9D Suggest to re-word this as it=E2=80=99s not clear =E2=80=93 is it about ext= ension to existing protocols or new protocol and where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, =E2=80=9CAC= TN=E2=80=9D protocol per se) that cannot be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is chartered to work on OPSF-TE for specific technologies while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to =E2=80=93 =E2=80=9CThe working group w= ill determine if new protocol or extensions to existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group, on the other hand any extensions to existing protocols would be done with interactions with other working groups where possible.=E2=80=9D * You may want to do charter text formatting in RFC text format taking care of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv *From:* ACTN [mailto:actn-bounces@ietf.org ] *On Behalf Of *Leeyoung *Sent:* 10 September 2014 04:53 *To:* Leeyoung; actn@ietf.org *Subject:* [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here=E2=80=99s a retransmission = with the subject. *From:* Leeyoung *Sent:* Tuesday, September 09, 2014 3:47 PM *To:* actn@ietf.org *Subject:* Hi, I hope your summer break was a good one. We=E2=80=99d like to give you some updates and plans on the ACTN work. We a= re going to request a formal BoF in Honolulu IETF meeting. In doing so, we need a charter draft as part of the due diligence. Here=E2=80=99s an initial chart= er draft developed by the small set of proponents of the work based on the discussions and use-cases and other published documents. We hope this captures a workable ACTN scope. This version 1.0 draft charter is also posted in the wiki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 ---------------------------------------------------------------------------= ------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and protection, and - Provide traffic engineering mechanism via centralized path computation. These represent key technologies for enabling flexible and dynamic networking, and efficient control and recovery of resources. Although these technologies provide significant benefits within a single domain control boundary, they do not meet the growing need for transport network virtualization in multi-domain transport networks. More and more network operators are building and operating on multi-domain transport networks. These domains (collections of links and nodes) may be each of a different technology, administrative zones, or vendor-specific islands. Establishment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of both operational concerns (control plane and management plane) and interoperability issues (control plane and data plane). Due to these issues, new services that require connections that traverse multiple domains need significant planning and often manual operations to interface different vendor equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and control multi-subnet, multi-technology, multi-vendor domain networks. Abstraction of transport networks also allows operators to consolidate their network services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynamic and elastic services, and will improve overall network operations and scaling of existing services. Discussion with operators has also highlighted a need for virtual network operation based on the abstraction of underlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstracting network resource information to provide virtual network control functions. This virtual network control functions are embedded in a multi-domain network coordinator to support various services/clients/applications to create and manage their own virtual networks that share the common transport network resources. The ACTN working group will work to develop a high-level architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenant customers (primarily internal service organizations with respect to a network operator), the virtual network control and the physical network domain controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify key building components and the corresponding interfaces among these components. The architecture work will lead to requirements for information models and protocol extensions between the virtual network controller and the physical network domain controllers and between the virt= ual network controller and multi-tenant customer controllers. Well-defined use cases from operators perspective with clearly stated need for transport network virtualization are critical in scoping the work and thus to achieve the deliverables of the working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technology transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator=E2=80=99s interconnection with optical transport = network infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtual network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain controls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and data models - Gap analysis of existing IETF and other protocols, encoding languages and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working groups to enhance existing protocols where possible. --e89a8f83a9813583750502deec8f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Lee,

=C2=A0

I rev= iewed the charter and find it good.

I have 2 comments

=C2=A0

Comment 1:

= In 5th pa= ragraph

YOUNG>>=E2=80=9CIt wi= ll identify key building components and the corresponding interfaces among = these components.=C2=A0=E2=80=9C

WAUTERS<= span lang=3D"EN-US" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">>>=E2=80=9CIt w= ill identify key building components and the corresponding interfaces among= these components. Key components can be future building block or legacy=C2= =A0components existing today=E2=80=9C

=C2=A0

Comment 2:

I don=E2=80=99t have a lot of experience with writing charters= , but instead of =E2=80=9C=E2=80=A6 will work on =E2=80=A6=E2=80=9D isn=E2= =80=99t the objective to come to conclusions or aim clear recommendations ?=

Note that my experience with IETF = is not large enough to know whether what I state here makes sense.

=C2=A0

YOUNG>> =C2=A0=E2=80=9CHigh-level architecture that describes the= basic building blocks to enable transport network virtualization to suppor= t use cases.

WAUTERS>> =E2=80= =9CPropose a high-level architecture =E2=80=A6=E2=80=A6

=C2=A0

YOUNG>> =C2=A0=E2=80=9CEvaluation of Information model/= data model to support the use cases.

=C2=A0

YO= UNG>> =C2=A0=E2=80=9CRequirements to support APIs/protocols, encoding= languages, and data models

WAUTERS= >> =C2=A0=E2=80=9CCollect requirements to support APIs/protoco= ls, encoding languages, and data models

=C2=A0

YOUNG>>Gap= analysis of existing IETF and other protocols, encoding languages and data= models to fulfill the requirements.

WAUTERS>>Perform gap analysis of existing IETF and other pr= otocols, encoding languages and data models to fulfill the requirements.

=C2=A0

YOUNG>> =E2=80=9CProtocol extensions (if necessary after r= e-chartering).

= WAUTERS>> =E2= =80=9CPropose protocol extensions (if necessary after re-chartering)= .

=C2=A0

Regards

Nico

=C2=A0

= =C2=A0

From: Dhruv Dhody [mailto:dhruv.dhody@huawei.com]
Sent: vrijdag 12 september= 2014 4:33
To: Leeyoung; actn@ie= tf.org
Subject: Re: [Actn] ACTN charter v1.0

=

=C2=A0

Hi Young,

=C2=A0

Plea= se see inline..

=C2=A0

From: Dhruv Dhody
Sent: Wednesday, September 10, 2014 10:48 PMTo: Leeyoung; Leeyoung; actn@ietf.= org
Subject: RE: ACTN charter v1.0

=C2=A0

Hi Young,

<= span lang=3D"EN-US" style=3D"font-family:"Candara","sans-ser= if";color:#993366">=C2=A0

Please find some comments on the proposed charter.

=C2=A0

* Do we need some text in charter a= lso to specify what we consider as Transport networks?

=C2=A0

YOUNG>> That may clarify the scope. Do = you have any suggestion? =C2=A0One definition from the Problem Statement dr= aft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem-st= atement/) is as follows. Would this be good enough or need more work? <= /span>

=C2=A0

=

T= ransport networks are defined as network infrastructure that

=C2= =A0=C2=A0 provides connectivity and bandwidth for customer services. They

=C2=A0=C2=A0 are characterized by their ability to support server l= ayer

=C2=A0=C2=A0=C2=A0provisioning and traffic engineering for c= lient layer services,

=C2=A0=C2=A0=C2=A0such that resource guaran= tees may be provided to their customers.

=C2=A0=C2=A0 Transport ne= tworks in this document refer to a set of different

=C2=A0=C2=A0 t= ype of connection-oriented networks, which include Connection-

=C2= =A0=C2=A0 Oriented Circuit Switched (CO-CS) networks and Connection-=

=C2=A0=C2=A0 Oriented Packet Switched (CO-PS) networks. This implies tha= t at

=C2=A0=C2=A0=C2=A0least the following transport networks are= in scope of the

=C2=A0=C2=A0 discussion of this draft: Layer 1 (L= 1) optical networks (e.g.,

=C2=A0=C2=A0=C2=A0Optical Transport Ne= tworks (OTN) and Wavelength Switched Optical

=C2=A0=C2=A0=C2=A0Ne= tworks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

=C2=A0= =C2=A0 network technologies with connection-oriented behavior.

=C2=A0

=C2=A0

[Dhruv]: Yes that would be good wi= th Eve suggestion and removing =E2=80=98in the document=E2=80=99/=E2=80=99o= f this draft=E2=80=99.

=C2=A0

= =C2=A0

* =E2=80= =9CTransport networks have a variety of mechanisms to:

-=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 Facilitate separation o= f data plane and control plane,

-=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 Allow for distributed or centralized signaling= =C2=A0 for path setup and protection, and

-=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 Provide traffic engineering mechanism = via centralized path computation.=E2=80=9D

=C2=A0

Term =E2=80=98centralized signaling=E2=80=99 is confusing t= o me, do you mean, the use of NMS?

=C2=A0

YOUNG>> Yes. We can reword the second point: =E2=80=9CAllow f= or distributed signaling or an NMS-based centralized signaling for set up= =E2=80=A6.=E2=80=9D

=C2=A0

[Dhruv= ]: That works!

= =C2=A0

* =E2=80= =9CThe architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers.=E2=80=9D

=C2=A0

It would be nice to add =E2=80=9Cmulti-domain coordina= tor=E2=80=9D with =E2=80=9Cvirtual network controller=E2=80=9D to explicitl= y link them together. Also multi-tenant customer controllers doesn=E2=80=99= t convey the intention to have different customer controllers for each tena= nt, how about=E2=80=A6

=C2=A0

=E2= =80=9CThe architecture work will lead to requirements for information model= s and protocol extensions between the virtual network controller (embedded = in a multi-domain coordinator) and the physical network domain controllers = and between the virtual network controller and multiple tenant customer con= trollers.=E2=80=9D

=C2=A0

YOUNG&g= t;> This sounds good to me. Thanks.

=C2=A0

* =E2=80=9CThe working group will determine if new protocol = extensions are necessary. If the working group determines they are necessar= y, then it will develop the new protocols within the working group where ne= cessary, while interacting with other working groups to enhance existing pr= otocols where possible.=E2=80=9D

=C2=A0

Suggest to re-word this as it=E2=80=99s not clear =E2=80=93 is it abo= ut extension to existing protocols or new protocol and where that work migh= t be taken up. Also Protocol extensions is mentioned as a work item after r= e-chartering. =C2=A0

=C2=A0

YOUNG&= gt;> New protocol extensions mean a brand new protocol (say, =E2=80=9CAC= TN=E2=80=9D protocol per se) that cannot be extended from existing protocol= s. But there may be some areas where we need to expand from existing protoc= ols. In such case, we need to interact with the corresponding WGs. Perhaps = an analogy would be that CCAMP WG is chartered to work on OPSF-TE for speci= fic technologies while OSPF WG needs to be informed of the protocol changes= .

=C2=A0<= /p>

[Dhruv]: How about we re= word this to =E2=80=93 =E2=80=9CThe working group will determine if new pro= tocol or extensions to existing protocols are necessary. If the working gro= up determines they are necessary, then it will develop new protocols within= the working group, on the other hand any extensions to existing protocols = would be done=C2=A0 with interactions with other working groups where possi= ble.=E2=80=9D

= =C2=A0

* You may want to do charter text formatting in RFC te= xt format taking care of word-wraps and indentation

YOUNG>= > Not sure what you meant here. Please clarify it for me.

[Dhruv]: Refer attachment, this format would help when we upload it to the= data tracker and charter diff tool can help track it better. =C2=A0=

This version has all the changes suggested by me and Eve.

Regards,

Dhruv

Hope you find them useful in making the charter text cris= p.

=C2=A0=

YOUNG>> Definitel= y. Thanks a lot for your review and great comments.

=C2=A0

Dhruv

=C2=A0

=C2=A0

From: ACTN [mailto:actn-bounces@ietf.org] O= n Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To:<= /b> Leeyoung; actn@ietf.org
Subj= ect: [Actn] ACTN charter v1.0

=C2=A0

Sorry, I forgot the Subject of this emai= l. Here=E2=80=99s a retransmission with the subject.

=C2=A0

From: Leeyoung
Sent: Tuesday, Septem= ber 09, 2014 3:47 PM
To: actn@ie= tf.org
Subject:

=C2=A0

Hi,

=C2=A0

I hope your summer brea= k was a good one.

= =C2=A0

We=E2=80=99d l= ike to give you some updates and plans on the ACTN work. We are going to re= quest a formal BoF in Honolulu IETF meeting. In doing so, we need a charter= draft as part of the due diligence. Here=E2=80=99s an initial charter draf= t developed by the small set of proponents of the work based on the discuss= ions and use-cases and other published documents. =C2=A0We hope this captur= es a workable ACTN scope. =C2=A0This version 1.0 draft charter is also post= ed in the wiki: https://sites.google.com/site/actnbof/home/charter-propor

=C2=A0

Your review and comment will be grea= tly appreciated to come up with a good charter developed by the community o= f interest. =C2=A0

= =C2=A0

Best regards,<= /span>

Young (on behalf of t= he proponents)

=C2= =A0

-----------------= --------------draft charter 1.0 -------------------------------------------= ---------------------------------------------------------

=C2=A0

Transport networks have a variety of mechanisms to:

= -=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Facilitate se= paration of data plane and control plane,

-= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Allow for distributed or centralized signaling=C2= =A0 for path setup and protection, and

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 = Provide tra= ffic engineering mechanism via centralized path computation.

=C2=A0

These represent key technologies for enabling fl= exible and dynamic networking, and efficient control and recovery of resour= ces. Although these technologies provide signif= icant benefits within a single domain control boundary, they do not meet th= e growing need for transport network virtualization in multi-domain transpo= rt networks. More and more network operators are building and operating on = multi-domain transport networks. These domains (collections of links and no= des) may be each of a different technology, administrative zones, or vendor= -specific islands. Establishment of end-to-end connections spanning multipl= e domains is a perpetual problem for operators because of both operational = concerns (control plane and management plane) and interoperability issues (= control plane and data plane).=C2=A0 Due to these issues, new services that= require connections that traverse multiple domains need significant planni= ng and often manual operations to interface different vendor equipment and = technology.

=C2=A0

The aim of Abstraction and Control of Trans= port Networks (ACTN) is to facilitate a centralized virtual network operati= on: the creation of a virtualized environment allowing operators to view an= d control multi-subnet, multi-technology, multi-vendor domain networks. Abs= traction of transport networks also allows operators to consolidate their n= etwork services into multi-tenant virtual transport networks. This will ena= ble rapid service deployment of new dynamic and elastic services, and will = improve overall network operations and scaling of existing services. Discus= sion with operators has also highlighted a need for virtual network operati= on based on the abstraction of underlying technology and vendor domains.

=C2=A0

Multi-domain network coordination function in ACTN is built on a = control hierarchy where a multi-domain coordinator interacts with each doma= in controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for = abstracting network resource information to provide virtual network control= functions. This virtual network control functions are embedded in a multi-= domain network coordinator to support various services/clients/applications= to create and manage their own virtual networks that share the common tran= sport network resources.

=C2=A0

The ACTN working group will work t= o develop a high-level architecture for transport network abstraction and c= ontrol that facilitates seamless vertical service coordination across multi= -tenant customers (primarily internal service organizations with respect to= a network operator), the virtual network control and the physical network = domain controls as well as a horizontal E2E service coordination across mul= ti-domain networks. It will identify key building components and the corres= ponding interfaces among these components.=C2=A0 The architecture work will= lead to requ= irements for information models and protocol extensions between the virtual= network controller and the physical network domain controllers and between the v= irtual network controller and multi-tenant customer controllers. Well-defined use cases from operators pers= pective with clearly stated need for transport network virtualization are c= ritical in scoping the work and thus to achieve the deliverables of the wor= king group.

=C2=A0

The working group will work on the following items:=

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 High-lev= el architecture that describes the basic building blocks to enable transpor= t network virtualization to support use cases.

-= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Operator-driven use cases to address = the following initial items:

o=C2= =A0=C2=A0=C2=A0 Virtual network control and operation for core transport P= acket Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o=C2=A0=C2=A0=C2=A0 Virtual network control and = operation for mobile backhaul multi-technology transport (e.g., MPLS-TP and= MPLS/OTN)

o=C2=A0=C2=A0=C2=A0 Da= ta Center Operator=E2=80=99s interconnection with optical transport network= infrastructure providers to support dynamic virtual circuit services.

o=C2=A0=C2=A0=C2=A0 Multi-tenant sup= port to allow virtual network information query, virtual network negotiatio= n, creation/deletion and modification.

o=C2=A0=C2=A0=C2=A0 Synchronization of network resources view acro= ss physical domain controls and virtual network control.

o=C2=A0=C2=A0=C2=A0 Dynamic service control and monitoring= across all entities.

Initial work within the working group will be limited to a single operator= administrative domain with an exception for the Data Center operation use = case.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif"">-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Ev= aluation of Information model/data model to support the use cases.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Requirements to s= upport APIs/protocols, encoding languages, and data models

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Gap analysis of existing = IETF and other protocols, encoding languages and data models to fulfill the= requirements.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0 Protocol extensions (if necessary after re-chartering).

<= p class=3D"MsoNormal" style=3D"line-height:150%">=C2=A0

=C2=A0

=C2=A0

=C2=A0

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References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> In-Reply-To: <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> Accept-Language: it-IT, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [153.88.183.149] Content-Type: multipart/alternative; boundary="_000_4A1562797D64E44993C5CBF38CF1BE481276003BESESSMB301erics_" MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmpgkeLIzCtJLcpLzFFi42KZGfG3Rncmk3CIwewNFhZbei6wWfSvOMNi MW2eqwOzR8uRt6weS5b8ZApgiuKySUnNySxLLdK3S+DKuPH1AXPBsQ/MFXeu32JqYFyxg7mL kZNDQsBEom9CFzuELSZx4d56ti5GLg4hgaOMEu1XdjNCOIsZJRbv28bUxcjBwSZgJfHkkA9I g4hAtsTqrg6wZmEBOYmvD0+wQ8TlJU59ecYMYbtJ7Fs8lQnEZhFQlTjw7RtYDa+Ar8S6Q/uZ IOZPZ5K4teUKWAOnQJjExjUQNqOArMSE3YsYQWxmAXGJW0/mM0FcKiCxZM95qA9EJV4+/scK YStJrD28nQWiPl/izbZ1jBDLBCVOznzCMoFRZBaSUbOQlM1CUgYR15O4MXUKG4StLbFs4Wtm CFtXYsa/QyzI4gsY2VcxihanFhfnphsZ66UWZSYXF+fn6eWllmxiBEbZwS2/dXcwrn7teIhR gINRiYc3wUowRIg1say4MvcQozQHi5I476Jz84KFBNITS1KzU1MLUovii0pzUosPMTJxcEo1 MJq/OciW+/OvmmziBVbJt/53zxXErLm5e1X3pKvHC2XtTi0P+lLKy3e49saSnaWzZp2+/uji pYD/+5se2S7ULjVfNK1w3fuj9/k8T8rObPs2NWuZmVCPTvXTv0yfPhsxtS33vj7/0CQTi0zX l/FX1qW+fTfj5L7nhmZczKkcFtXfwu8e/J5yuvePEktxRqKhFnNRcSIAE/GE65MCAAA= Archived-At: http://mailarchive.ietf.org/arch/msg/actn/e5R4m_uXt3IcDz1KvDOWx2NVEPs Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 14:26:44 -0000 --_000_4A1562797D64E44993C5CBF38CF1BE481276003BESESSMB301erics_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized= signaling means. NMS based is one of the possibilities but it's not limite= d to NMS. A network implementing e.g. Open Flow or any other similar protoc= ol should be considered as well IMHO. Here I'm not sure whether we can spea= k about centralized signaling in both cases or not. In the case of NMS we u= se the management plane to dynamically provision connectivity (whatever pro= tocol is used). In the case of e.g. Open Flow can we speak about management= plane or is something else? Please note that I speak about OF as it's the = only example that comes to my mind but any other possibility can/must be co= nsidered. 2. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. 3. Again on multiodomain: maybe we could improve the architecture draf= t saying what is centralized and what is distributed. E.g. VPN prefixes exc= hange could be distributed (controllers speaking MP-BGP with each other) wh= ile provisioning could be hierarchical (i.e. the coordinator asks controlle= r A to provision a path with domain A and asks controller B to provide a pa= th within B so to have an end to end path crossing domains A and B)...H-PCE= like. BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_4A1562797D64E44993C5CBF38CF1BE481276003BESESSMB301erics_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Dhruv, Young,

 

Excellent progresses!<= o:p>

Let me just add some n= otes/questions.

I’m collecting t= hem here and not inline as the reading of the whole thread is becoming pret= ty complex.

 

1.&= nbsp;     On centralized= signaling: We need to clearly state what centralized signaling means. NMS = based is one of the possibilities but it’s not limited to NMS. A netw= ork implementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here I’m not sur= e whether we can speak about centralized signaling in both cases or not. In= the case of NMS we use the management plane to dynamically provision conne= ctivity (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plane or is somet= hing else? Please note that I speak about OF as it’s the only example= that comes to my mind but any other possibility can/must be considered.

2.&= nbsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.<= o:p>

3.&= nbsp;     Again on multi= odomain: maybe we could improve the architecture draft saying what is centr= alized and what is distributed. E.g. VPN prefixes exchange could be distrib= uted (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordi= nator asks controller A to provision a path with domain A and asks controll= er B to provide a path within B so to have an end to end path crossing doma= ins A and B)…H-PCE like.

 

 

BR
Daniele

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 <= /o:p>

 <= /o:p>

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

----------------= ------------

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv<= /o:p>

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_4A1562797D64E44993C5CBF38CF1BE481276003BESESSMB301erics_-- From nobody Fri Sep 12 07:27:03 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7359A1A6F14 for ; Fri, 12 Sep 2014 07:26:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HMaMClpobjKo for ; Fri, 12 Sep 2014 07:26:46 -0700 (PDT) Received: from sessmg23.ericsson.net (sessmg23.ericsson.net [193.180.251.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 38ABE1A0AF9 for ; Fri, 12 Sep 2014 07:26:45 -0700 (PDT) X-AuditID: c1b4fb2d-f793d6d000005356-60-541302a31865 Received: from ESESSHC015.ericsson.se (Unknown_Domain [153.88.253.124]) by sessmg23.ericsson.net (Symantec Mail Security) with SMTP id ED.D0.21334.3A203145; Fri, 12 Sep 2014 16:26:43 +0200 (CEST) Received: from ESESSMB301.ericsson.se ([169.254.1.77]) by ESESSHC015.ericsson.se ([153.88.183.63]) with mapi id 14.03.0174.001; Fri, 12 Sep 2014 16:26:42 +0200 From: Daniele Ceccarelli To: "Varma, Eve L (Eve)" , Leeyoung , Dhruv Dhody , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAABNQAIABdgnA Date: Fri, 12 Sep 2014 14:26:42 +0000 Message-ID: <4A1562797D64E44993C5CBF38CF1BE4812760054@ESESSMB301.ericsson.se> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <6D32668528F93D449A073F45707153D82C4BE1D7@US70UWXCHMBA05.zam.alcatel-lucent.com> In-Reply-To: <6D32668528F93D449A073F45707153D82C4BE1D7@US70UWXCHMBA05.zam.alcatel-lucent.com> Accept-Language: it-IT, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [153.88.183.149] Content-Type: multipart/alternative; boundary="_000_4A1562797D64E44993C5CBF38CF1BE4812760054ESESSMB301erics_" MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFupmkeLIzCtJLcpLzFFi42KZGfG3Rncxk3CIwY3HKhZbei6wWfSvOMNi sbTpCaPFtHmuDiwerc/2snq0HHnL6rFkyU+mAOYoLpuU1JzMstQifbsEroxL656xFlzbxlzR +2AqcwPjq1bmLkZODgkBE4mVN2eyQdhiEhfurQeyuTiEBI4ySuzeth/KWcwo8WPaYaYuRg4O NgEriSeHfEDiIgKLGCXe33rMCNItLCAn8fXhCXYQW0RAXuLUl2fMELabxK8T65lAbBYBVYlb 26+D2bwCvhIXTn1kgVgwj0li98p/YM2cArESW1Z+B2tmFJCVmLB7EdgCZgFxiVtP5jNBnCog sWTPeagXRCVePv7HCmErSaw9vJ0Foj5f4vra+ywQywQlTs58wjKBUWQWklGzkJTNQlIGEdeT uDF1ChuErS2xbOFrZghbV2LGv0MsyOILGNlXMYoWpxYX56YbGeulFmUmFxfn5+nlpZZsYgTG 3sEtv3V3MK5+7XiIUYCDUYmHN8FKMESINbGsuDL3EKM0B4uSOO+ic/OChQTSE0tSs1NTC1KL 4otKc1KLDzEycXBKNTAG/mY8Y3QmTKhx29Q8Q68fYZkbCu/tOZK1bufzE2u3++65FZEbcmWx tdF+h+5rxjr9q9xZJNzubEmf7HNszbTDMrMFfb/8+cHZWTTz/LK2/LdPloYf/VIUs2r3BeED +//ou/xoe8LCc4SdK3u2Ynz3uvgJPZ3CKWUReQnJK+fdnnT15H/fN9GXlFiKMxINtZiLihMB 6JAYC54CAAA= Archived-At: http://mailarchive.ietf.org/arch/msg/actn/RYcUKZ1kZpenC0SM31AnNahSyoM Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 14:26:54 -0000 --_000_4A1562797D64E44993C5CBF38CF1BE4812760054ESESSMB301erics_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Good catch Eve, Could we include also segment routing into the list of connection oriented = technologies? I don't know whether it could be considered as part of the MP= LS-TE or not (don't think so). BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve) Sent: gioved=EC 11 settembre 2014 18:09 To: Leeyoung; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi, Just a quick terminology comment - the wording below infers OTN is only L1,= when it is both L1 and L0 :) So I would suggest to reword as "This implie= s that at least the following transport networks are in scope of the discus= sion of this draft: Layer 1 (L1) and Layer 0 (L0) optical networks (e.g., O= TN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other emerging network tech= nologies with connection-oriented behavior". Best regards, Eve From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Thursday, September 11, 2014 11:17 AM To: Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Dhruv, Thanks for providing your valuable comment. Please see inline for my response. Thanks. Young From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_4A1562797D64E44993C5CBF38CF1BE4812760054ESESSMB301erics_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Good catch Eve,

 

Could we include also = segment routing into the list of connection oriented technologies? I don= 217;t know whether it could be considered as part of the MPLS-TE or not (do= n’t think so).

 

BR
Daniele

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve)
Sent: gioved=EC 11 settembre 2014 18:09
To: Leeyoung; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi,

 

Just a quick terminology comme= nt - the wording below infers OTN is only L1, when it is both L1 and L0 J  So I would suggest to reword as ̶= 0;This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) and Layer 0 (L0) optic= al networks (e.g., OTN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other e= merging network technologies with connection-oriented behavior”.=

 

Best regards,

Eve

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Thursday, September 11, 2014 11:17 AM
To: Dhruv Dhody; actn@ietf.org<= br> Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dhruv,

 

Thanks for providing y= our valuable comment.

 

Please see inline for = my response. Thanks.

 

Young

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_4A1562797D64E44993C5CBF38CF1BE4812760054ESESSMB301erics_-- From nobody Fri Sep 12 08:08:33 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 94EC61A06C6 for ; Fri, 12 Sep 2014 08:08:30 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vFtYMaDLqnWW for ; Fri, 12 Sep 2014 08:08:22 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 5623A1A04F1 for ; Fri, 12 Sep 2014 08:08:21 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhrdlp03-ep) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJI81141; Fri, 12 Sep 2014 15:08:19 +0000 (GMT) Received: from DFWEML704-CHM.china.huawei.com (10.193.5.141) by lhreml404-hub.china.huawei.com (10.201.5.218) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 12 Sep 2014 16:07:57 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml704-chm ([10.193.5.141]) with mapi id 14.03.0158.001; Fri, 12 Sep 2014 08:07:39 -0700 From: Leeyoung To: Daniele Ceccarelli , Dhruv Dhody , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuA= Date: Fri, 12 Sep 2014 15:07:39 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> In-Reply-To: <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F12Adfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/_h8ftODTHc9aWgae1XW9m7Zn0bg Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 15:08:30 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F12Adfweml706chm_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized= signaling means. NMS based is one of the possibilities but it's not limite= d to NMS. A network implementing e.g. Open Flow or any other similar protoc= ol should be considered as well IMHO. Here I'm not sure whether we can spea= k about centralized signaling in both cases or not. In the case of NMS we u= se the management plane to dynamically provision connectivity (whatever pro= tocol is used). In the case of e.g. Open Flow can we speak about management= plane or is something else? Please note that I speak about OF as it's the = only example that comes to my mind but any other possibility can/must be co= nsidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." 2. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draf= t saying what is centralized and what is distributed. E.g. VPN prefixes exc= hange could be distributed (controllers speaking MP-BGP with each other) wh= ile provisioning could be hierarchical (i.e. the coordinator asks controlle= r A to provision a path with domain A and asks controller B to provide a pa= th within B so to have an end to end path crossing domains A and B)...H-PCE= like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F12Adfweml706chm_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Daniele,=

 

Thanks for providing y= our good comments here. Some of your comment (1) is for charter discussion = while the others (2 & 3) are architecture discussion. As a few folks ar= e already working on the architecture document, we may start a new email thread on architecture discussion while developin= g the draft.

 

Please see inline for = my response.

 

Regards,

Young

 

From: Daniele = Ceccarelli [mailto:daniele.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Dhruv, Young,

 

Excellent progresses!<= o:p>

Let me just add some n= otes/questions.

I’m collecting t= hem here and not inline as the reading of the whole thread is becoming pret= ty complex.

 

1.&n= bsp;     On centralized= signaling: We need to clearly state what centralized signaling means. NMS = based is one of the possibilities but it’s not limited to NMS. A netw= ork implementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here I’m not sur= e whether we can speak about centralized signaling in both cases or not. In= the case of NMS we use the management plane to dynamically provision conne= ctivity (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plane or is somet= hing else? Please note that I speak about OF as it’s the only example= that comes to my mind but any other possibility can/must be considered.

 

YOUNG>> The inte= ntion here was giving some overview of the tools that current transport net= works have. Of course thing are quickly changing with other initiatives lik= e OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps good compromis= e would be putting NMS based as an example. How about restating like:<= /o:p>

 

Allow for distributed signaling or central= ized signaling (e.g., an NMS-based, etc.) for set up….”   

 

 

2.&n= bsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.

 

YOUNG>> These op= tions seem to be detailed architecture that the upcoming architecture docum= ent should address in detail. My personal opinion is that both architecture= s need to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial = baseline architecture.

 

3.&n= bsp;     Again on multi= odomain: maybe we could improve the architecture draft saying what is centr= alized and what is distributed. E.g. VPN prefixes exchange could be distrib= uted (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordi= nator asks controller A to provision a path with domain A and asks controll= er B to provide a path within B so to have an end to end path crossing doma= ins A and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

 

BR
Daniele

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 <= /o:p>

 <= /o:p>

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

----------------= ------------

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv<= /o:p>

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F12Adfweml706chm_-- From nobody Fri Sep 12 08:21:19 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 753121A6F17 for ; Fri, 12 Sep 2014 08:21:14 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.6 X-Spam-Level: X-Spam-Status: No, score=-2.6 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MWTxrOEpvtNs for ; Fri, 12 Sep 2014 08:21:12 -0700 (PDT) Received: from sessmg22.ericsson.net (sessmg22.ericsson.net [193.180.251.58]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 5C5881A6F14 for ; Fri, 12 Sep 2014 08:21:11 -0700 (PDT) X-AuditID: c1b4fb3a-f79da6d0000008c7-5d-54130f64b78a Received: from ESESSHC006.ericsson.se (Unknown_Domain [153.88.253.124]) by sessmg22.ericsson.net (Symantec Mail Security) with SMTP id 58.36.02247.46F03145; Fri, 12 Sep 2014 17:21:08 +0200 (CEST) Received: from ESESSMB301.ericsson.se ([169.254.1.77]) by ESESSHC006.ericsson.se ([153.88.183.36]) with mapi id 14.03.0174.001; Fri, 12 Sep 2014 17:21:07 +0200 From: Daniele Ceccarelli To: "actn@ietf.org" Thread-Topic: ACTN architecture Thread-Index: Ac/Om8qi9g/D/THATIaDRn5wbOi7GA== Date: Fri, 12 Sep 2014 15:21:07 +0000 Message-ID: <4A1562797D64E44993C5CBF38CF1BE481276015F@ESESSMB301.ericsson.se> Accept-Language: it-IT, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [153.88.183.154] Content-Type: multipart/alternative; boundary="_000_4A1562797D64E44993C5CBF38CF1BE481276015FESESSMB301erics_" MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrOLMWRmVeSWpSXmKPExsUyM+JvjW4Kv3CIQc96RYstPRfYHBg9liz5 yRTAGMVlk5Kak1mWWqRvl8CVsfzafaaCc2EVK18cZmtgXOLdxcjJISFgIvFq3VJmCFtM4sK9 9WxdjFwcQgJHGSXefzjICOEsZpSY/fsUUBUHB5uAlcSTQz4gDSICyhKLD/9hA7GFBaQkpn/v YoWIy0tcf3GBEcLWk+h5fZkFxGYRUJV4dP0dmM0r4CuxZ1s/E4jNKCArMWH3IrB6ZgFxiVtP 5jNBHCQgsWTPeajjRCVePv7HCmErSSy6/ZkJoj5f4uuhD+wQMwUlTs58wjKBUWgWklGzkJTN QlIGEdeRWLD7ExuErS2xbOFrZhj7zIHHTMjiCxjZVzGKFqcWF+emGxnppRZlJhcX5+fp5aWW bGIExsTBLb+tdjAefO54iFGAg1GJhzfBSjBEiDWxrLgy9xCjNAeLkjjvwnPzgoUE0hNLUrNT UwtSi+KLSnNSiw8xMnFwSjUwrp9scffqgX0ROrxLbVnK9KM6GZ0Of6vJOvfesk22tPum8b4c DfmbhemFc9SrbQLVO7gqIirmBznq9rvlFiz2m7Ngt1r0nYqY2glVy66e+H3MTbz4duyclbWT DbRT/4RJub5Kvbfc3kzc8tWpC4cZLjt9vrzpZ+frnUfTmrkXdr8K2yFg8EBDiaU4I9FQi7mo OBEAa4qWe2oCAAA= Archived-At: http://mailarchive.ietf.org/arch/msg/actn/G_bKRPx4VuczC3u5lcL0Eon8wKM Subject: [Actn] ACTN architecture X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 15:21:14 -0000 --_000_4A1562797D64E44993C5CBF38CF1BE481276015FESESSMB301erics_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Reposting my architecture considerations and Young's replies in a dedicated= thread. 1. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. [[DanCe]] Agree. Let's keep track of both of them. 2. Again on multidomain: maybe we could improve the architecture draft= saying what is centralized and what is distributed. E.g. VPN prefixes exch= ange could be distributed (controllers speaking MP-BGP with each other) whi= le provisioning could be hierarchical (i.e. the coordinator asks controller= A to provision a path with domain A and asks controller B to provide a pat= h within B so to have an end to end path crossing domains A and B)...H-PCE = like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? [[DanCe]] The scenarios that come to my mind are more "horizontal". I would= say the either the nodes speak MP-BGP with each other across the domains = (in case of distributed protocols) or the controllers gets the information = from its own domain and then speak MP-BGP with the other controllers "on be= half of their domains" BR Daniele --_000_4A1562797D64E44993C5CBF38CF1BE481276015FESESSMB301erics_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Reposting my architect= ure considerations and Young’s replies in a dedicated thread.

 

 

1.&= nbsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.<= o:p>

 

YOUNG>> These option= s seem to be detailed architecture that the upcoming architecture document = should address in detail. My personal opinion is that both architectures ne= ed to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial baseli= ne architecture.

[[DanCe]] Agree. Let&#= 8217;s keep track of both of them.

 

2.&= nbsp;     Again on multi= domain: maybe we could improve the architecture draft saying what is centra= lized and what is distributed. E.g. VPN prefixes exchange could be distribu= ted (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordinator= asks controller A to provision a path with domain A and asks controller B = to provide a path within B so to have an end to end path crossing domains A= and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

[[DanCe]] The scenario= s that come to my mind are more “horizontal”. I would say the e= ither the nodes speak MP-BGP with each other across the domains  (in c= ase of distributed protocols) or the controllers gets the information from its own domain and then speak MP-BGP with the other c= ontrollers “on behalf of their domains”

 

BR
Daniele

 

--_000_4A1562797D64E44993C5CBF38CF1BE481276015FESESSMB301erics_-- From nobody Fri Sep 12 08:34:26 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2B1D11A06D8 for ; Fri, 12 Sep 2014 08:34:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.551 X-Spam-Level: X-Spam-Status: No, score=-3.551 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-1.652] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id NQE4rgEC7Fld for ; Fri, 12 Sep 2014 08:34:13 -0700 (PDT) Received: from smtp-fr.alcatel-lucent.com (fr-hpgre-esg-02.alcatel-lucent.com [135.245.210.23]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4B4CE1A00A3 for ; Fri, 12 Sep 2014 08:34:13 -0700 (PDT) Received: from fr711usmtp1.zeu.alcatel-lucent.com (unknown [135.239.2.122]) by Websense Email Security Gateway with ESMTPS id 005BAF309DEFD; Fri, 12 Sep 2014 15:34:07 +0000 (GMT) Received: from FR711WXCHHUB01.zeu.alcatel-lucent.com (fr711wxchhub01.zeu.alcatel-lucent.com [135.239.2.111]) by fr711usmtp1.zeu.alcatel-lucent.com (GMO) with ESMTP id s8CFYAPs032309 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 12 Sep 2014 17:34:10 +0200 Received: from FR711WXCHMBA05.zeu.alcatel-lucent.com ([169.254.1.23]) by FR711WXCHHUB01.zeu.alcatel-lucent.com ([135.239.2.111]) with mapi id 14.02.0247.003; Fri, 12 Sep 2014 17:34:10 +0200 From: "BELOTTI, SERGIO (SERGIO)" To: Leeyoung Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAAl1QA== Date: Fri, 12 Sep 2014 15:34:09 +0000 Message-ID: References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> Accept-Language: it-IT, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [135.239.27.38] Content-Type: multipart/alternative; boundary="_000_B9FEE68CE3A78C41A2B3C67549A96F486D51A8C1FR711WXCHMBA05z_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/HuDlSW5WabYqpp1ZwtB1uGjeGO4 Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 15:34:24 -0000 --_000_B9FEE68CE3A78C41A2B3C67549A96F486D51A8C1FR711WXCHMBA05z_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Young, Daniele Please see in line . Thanks Sergio From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: venerd=EC 12 settembre 2014 17:08 To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized = signaling means. NMS based is one of the possibilities but it's not limited= to NMS. A network implementing e.g. Open Flow or any other similar protoco= l should be considered as well IMHO. Here I'm not sure whether we can speak= about centralized signaling in both cases or not. In the case of NMS we us= e the management plane to dynamically provision connectivity (whatever prot= ocol is used). In the case of e.g. Open Flow can we speak about management = plane or is something else? Please note that I speak about OF as it's the o= nly example that comes to my mind but any other possibility can/must be con= sidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." SB> I have still problems with this definition. In my view when you think a= bout to an NMS based path setup, I have a centralized station that is provi= ding command towards managed equipment functions that are virtualized in a = MIB , and these command provide the "resource reservation" phase (not only = but just to make the comparison with normal signaling protocol) using a "ve= rtical" management protocol . There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." 2. On multidomain issues: One question here: How do we want to manage m= ulti-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationship= between virtual network controller and physical network controller plus a = coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator o= f physical network controllers (1:N relationship between coordinator and PN= Cs) with a virtual network controller on top? (1:1 relationship between PNC= coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draft= saying what is centralized and what is distributed. E.g. VPN prefixes exch= ange could be distributed (controllers speaking MP-BGP with each other) whi= le provisioning could be hierarchical (i.e. the coordinator asks controller= A to provision a path with domain A and asks controller B to provide a pat= h within B so to have an end to end path crossing domains A and B)...H-PCE = like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and= protection, and - Provide traffic engineering mechanism via centralized path computa= tion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks t= o enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use case= s. - Requirements to support APIs/protocols, encoding languages, and da= ta models - Gap analysis of existing IETF and other protocols, encoding langua= ges and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_B9FEE68CE3A78C41A2B3C67549A96F486D51A8C1FR711WXCHMBA05z_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Youn= g, Daniele

&n= bsp;

Please = see in line .

&n= bsp;

Thanks =

Sergio<= o:p>

&n= bsp;

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 12 settembre 2014 17:08
To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dani= ele,

&n= bsp;

Thanks = for providing your good comments here. Some of your comment (1) is for char= ter discussion while the others (2 & 3) are architecture discussion. As= a few folks are already working on the architecture document, we may start a new email thread on architecture discussion while= developing the draft.

&n= bsp;

Please = see inline for my response.

&n= bsp;

Regards= ,

Young

&n= bsp;

From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@iet= f.org
Subject: RE: ACTN charter v1.0

 

Dhruv, = Young,

&n= bsp;

Excelle= nt progresses!

Let me = just add some notes/questions.

I’= ;m collecting them here and not inline as the reading of the whole thread i= s becoming pretty complex.

&n= bsp;

= 1.     On centralized signaling: We need to clearly state what centralized signal= ing means. NMS based is one of the possibilities but it’s not limited= to NMS. A network implementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here= I’m not sure whether we can speak about centralized signaling in bot= h cases or not. In the case of NMS we use the management plane to dynamical= ly provision connectivity (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plan= e or is something else? Please note that I speak about OF as it’s the= only example that comes to my mind but any other possibility can/must be c= onsidered.

&n= bsp;

YOUNG&g= t;> The intention here was giving some overview of the tools that curren= t transport networks have. Of course thing are quickly changing with other = initiatives like OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps = good compromise would be putting NMS based as an example. How about restati= ng like:

&n= bsp;

Allow for distributed signa= ling or centralized signaling (e.g., an NMS-based, etc.) for set up….= ”   =

&n= bsp;

SB> I ha= ve still problems with this definition. In my view when you think about to = an NMS based path setup, I have a centralized station that is providing com= mand towards managed equipment functions that are virtualized in a MIB , and these command provide the “resou= rce reservation” phase (not only but just to make the comparison with= normal signaling protocol) using a “vertical” management proto= col .

There is no= signaling in my view .

Another cas= e is PCE: PCE is providing path computation phase , and can exploit on a di= stributed control plane to make a signaling of the setup calculated. But ag= ain , it is not a centralized signaling , signaling is distributed , it is the routing, if anything,  that is= centralized in my view.

 =

So I would = suggest to delete the term signaling associated to centralized and change t= he sentence into:

“Allow for distributed signaling or centralized = model (e.g.an NMS-based) for set up….”

&n= bsp;

&n= bsp;

= 2.     On multidomain issues: One question here: How do we want to manage multi-d= omain? I see two ways:

a.     A coordinator of virtual network controllers – i.e. 1:1 relationship= between virtual network controller and physical network controller plus a = coordinator of virtual network controllers on top

b.     A coordinator of physical network controllers – i.e. a coordinator o= f physical network controllers (1:N relationship between coordinator and PN= Cs) with a virtual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, m= aybe pick one.

&n= bsp;

YOUNG&g= t;> These options seem to be detailed architecture that the upcoming arc= hitecture document should address in detail. My personal opinion is that bo= th architectures need to be considered as a starting point. There may be other variations. Then we may narrow the scop= e as an initial baseline architecture.

&n= bsp;

= 3.     Again on multiodomain: maybe we could improve the architecture draft sayin= g what is centralized and what is distributed. E.g. VPN prefixes exchange c= ould be distributed (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the= coordinator asks controller A to provision a path with domain A and asks c= ontroller B to provide a path within B so to have an end to end path crossi= ng domains A and B)…H-PCE like.

&n= bsp;

YOUNG&g= t;> Good point. I agree that the architecture draft should discuss these= dichotomy of control regimes (e.g., centralized vs. distributed). One ques= tion I have: are you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coor= dinator need to collect the VPN prefixes using the interface between the co= ordinator and each PNC (that speaks MP-BGP)? Then can this be viewed as a c= entralized component?

&n= bsp;

BR
Daniele

&n= bsp;

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

&n= bsp;

From: Dhruv Dhody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments o= n the proposed charter.

 

* Do we need some text in c= harter also to specify what we consider as Transport networks?

 

YOUNG>> That may clar= ify the scope. Do you have any suggestion?  One definition from the Pr= oblem Statement draft (https://datatracker.ietf.org/doc/draft-leeki= ng-actn-problem-statement/) is as follows. Would this be good enough or need more work?

 

T= ransport networks are defined as network infrastructure that

&= nbsp;  provides connectivity and bandwidth for customer services. They=

&= nbsp;  are characterized by their ability to support server layer

&= nbsp;  provisioning and traffic engineering for client layer serv= ices,

&= nbsp;  such that resource guarantees may be provided to their cus= tomers.

&= nbsp;  Transport networks in this document refer to a set of different=

&= nbsp;  type of connection-oriented networks, which include Connection-=

&= nbsp;  Oriented Circuit Switched (CO-CS) networks and Connection-=

&= nbsp;  Oriented Packet Switched (CO-PS) networks. This implies that at

&= nbsp;  least the following transport networks are in scope of the=

&= nbsp;  discussion of this draft: Layer 1 (L1) optical networks (e.g.,

&= nbsp;  Optical Transport Networks (OTN) and Wavelength Switched O= ptical

&= nbsp;  Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerg= ing

&= nbsp;  network technologies with connection-oriented behavior.

 

 

[Dhruv]: Yes that would be good with Eve suggestion and removing ‘= in the document’/’of this draft’.

 

 

* “Transport networks= have a variety of mechanisms to:

-    &n= bsp;          Facilitate separ= ation of data plane and control plane,

-    &n= bsp;          Allow for distri= buted or centralized signaling  for path setup and protection, and

-    &n= bsp;          Provide traffic = engineering mechanism via centralized path computation.”

 

Term ‘centralized sig= naling’ is confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can r= eword the second point: “Allow for distributed signaling or an NMS-ba= sed centralized signaling for set up….”

 

[Dhruv]: That works!

-= ---------------------------

 

* “The architecture w= ork will lead to requirements for information models and protocol extension= s between the virtual network controller and the physical network domain controllers and between the virtual network controller and multi-te= nant customer controllers.”

 

It would be nice to add = 220;multi-domain coordinator” with “virtual network controller&= #8221; to explicitly link them together. Also multi-tenant customer control= lers doesn’t convey the intention to have different customer controllers for each tenan= t, how about…

 

“The architecture wor= k will lead to requirements for information models and protocol extensions = between the virtual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the v= irtual network controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds g= ood to me. Thanks.

 

* “The working group = will determine if new protocol extensions are necessary. If the working gro= up determines they are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other wor= king groups to enhance existing protocols where possible.”=

 

Suggest to re-word this as = it’s not clear – is it about extension to existing protocols or= new protocol and where that work might be taken up. Also Protocol extensio= ns is mentioned as a work item after re-chartering.  <= /p>

 

YOUNG>> New protocol = extensions mean a brand new protocol (say, “ACTN” protocol per = se) that cannot be extended from existing protocols. But there may be some = areas where we need to expand from existing protocols. In such case, we need to = interact with the corresponding WGs. Perhaps an analogy would be that CCAMP= WG is chartered to work on OPSF-TE for specific technologies while OSPF WG= needs to be informed of the protocol changes.

 

[Dhruv]: How about we rewor= d this to – “The working group will determine if new protocol o= r extensions to existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within t= he working group, on the other hand any extensions to existing protocols wo= uld be done  with interactions with other working groups where possibl= e.”

 

* You may want to do charter text formatting in RFC text format taking = care of word-wraps and indentation

YOUNG>> Not sure what you meant here. Please clarify it for me.

[Dhruv]: Refer attachment, this format would help when we upload it to = the data tracker and charter diff tool can help track it better.  

This version has all the changes suggested by me and Eve.

Regards,

Dhruv

Hope you find them useful i= n making the charter text crisp.

 

YOUNG>> Definitely. T= hanks a lot for your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, = I forgot the Subject of this email. Here’s a retransmission with the = subject.

&n= bsp;

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a = good one.

 

We’d like to give you som= e updates and plans on the ACTN work. We are going to request a formal BoF = in Honolulu IETF meeting. In doing so, we need a charter draft as part of t= he due diligence. Here’s an initial charter draft developed by the small set of proponents of the work based on the di= scussions and use-cases and other published documents.  We hope this c= aptures a workable ACTN scope.  This version 1.0 draft charter is also= posted in the wiki: https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be= greatly appreciated to come up with a good charter developed by the commun= ity of interest.  

 

Best regards,=

Young (on behalf of the propone= nts)

 

-------------------------------= draft charter 1.0 ---------------------------------------------------------= -------------------------------------------

 

Transport networks have a variety of mec= hanisms to:

-F= acilitate separation of data plane and control plane,

-A= llow for distributed or centralized signaling  for path setup and prot= ection, and

-     &= nbsp;  P= rovide traffic engineering mechanism via centralized path computation.

 

These represent key technologies for ena= bling flexible and dynamic networking, and efficient control and recovery of resources. Although these tech= nologies provide significant benefits within a single domain control bounda= ry, they do not meet the growing need for transport network virtualization = in multi-domain transport networks. More and more network operators are building and operating on multi-domain= transport networks. These domains (collections of links and nodes) may be = each of a different technology, administrative zones, or vendor-specific is= lands. Establishment of end-to-end connections spanning multiple domains is a perpetual problem for operators= because of both operational concerns (control plane and management plane) = and interoperability issues (control plane and data plane).  Due to th= ese issues, new services that require connections that traverse multiple domains need significant planning and o= ften manual operations to interface different vendor equipment and technolo= gy.

 

The aim of Abstraction and Control of Transpo= rt Networks (ACTN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to= view and control multi-subnet, multi-technology, multi-vendor domain netwo= rks. Abstraction of transport networks also allows operators to consolidate= their network services into multi-tenant virtual transport networks. This will enable rapid service deployment of n= ew dynamic and elastic services, and will improve overall network operation= s and scaling of existing services. Discussion with operators has also high= lighted a need for virtual network operation based on the abstraction of underlying technology and vendor dom= ains.

 

Multi-domain network coordination function in= ACTN is built on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control pl= ane, SDN controller) for abstracting network resource information to provid= e virtual network control functions. This virtual network control functions= are embedded in a multi-domain network coordinator to support various services/clients/applications to cr= eate and manage their own virtual networks that share the common transport = network resources.

 

The ACTN working group will work to develo= p a high-level architecture for transport network abstraction and control that facilitates seamless vertical service coordination across= multi-tenant customers (primarily internal service organizations with resp= ect to a network operator), the virtual network control and the physical ne= twork domain controls as well as a horizontal E2E service coordination across multi-domain networks. It wil= l identify key building components and the corresponding interfaces among t= hese components.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer= controllers. Well-defined use cases fr= om operators perspective with clearly stated need for transport network vir= tualization are critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;  Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;  Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;  Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;  Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o&= nbsp;  Synchronization of network resources view across physical domain= controls and virtual network control. =

o&= nbsp;  Dynamic service control and monitoring across all entities. =

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span lang=3D"EN-US" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif""> 

 

--_000_B9FEE68CE3A78C41A2B3C67549A96F486D51A8C1FR711WXCHMBA05z_-- From nobody Fri Sep 12 08:46:40 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3103E1A0194 for ; Fri, 12 Sep 2014 08:46:39 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LtXTo-Y7XHLz for ; Fri, 12 Sep 2014 08:46:33 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 766181A0162 for ; Fri, 12 Sep 2014 08:46:32 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml405-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJI83749; Fri, 12 Sep 2014 15:46:30 +0000 (GMT) Received: from DFWEML702-CHM.china.huawei.com (10.193.5.72) by lhreml405-hub.china.huawei.com (10.201.5.242) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 12 Sep 2014 16:46:29 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml702-chm ([10.193.5.72]) with mapi id 14.03.0158.001; Fri, 12 Sep 2014 08:46:19 -0700 From: Leeyoung To: Dhruv Dhody , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAA3UaQ Date: Fri, 12 Sep 2014 15:46:18 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2F181@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> In-Reply-To: <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F181dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/x5bFil_yeFmgi9BxrklBaCALVxk Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 15:46:39 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F181dfweml706chm_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Dhruv, Thanks for providing a RFC text format of the charter. Now I understood wha= t you meant in the previous email. Please see inline for my comment. Thanks, Young From: Dhruv Dhody Sent: Thursday, September 11, 2014 9:33 PM To: Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. YOUNG>> Oh yes. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! YOUNG>> As discussed with Daniele, I proposed "Allow for distributed signal= ing or centralized signaling (e.g., an NMS-based, etc.) for set up...." Wou= ld this work for you? * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." YOUNG>> This is clearer to me. With some punctuation change, how about: "Th= e working group will determine if new protocol or extensions to existing pr= otocols are necessary. If the working group determines they are necessary, = then it will develop new protocols within the working group; on the other h= and, any extensions to existing protocols would be done with interactions w= ith other working groups where possible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. YOUNG>> Agree. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F181dfweml706chm_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Dhruv,

 

Thanks for providing a= RFC text format of the charter. Now I understood what you meant in the pre= vious email.

 

Please see inline for = my comment.

 

Thanks,

Young

 

From: Dhruv Dh= ody
Sent: Thursday, September 11, 2014 9:33 PM
To: Leeyoung; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 <= /o:p>

 <= /o:p>

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

YOUNG>> Oh yes. =

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

 

YOUNG>> As di= scussed with Daniele, I proposed “Allow for distributed signaling or = centralized signaling (e.g., an NMS-based, etc.) for set up….” = Would this work for you?

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”

 

YOUNG>> This = is clearer to me. With some punctuation change, how about: “The working group will determine if new prot= ocol or extensions to existing protocols are necessary. If the working grou= p determines they are necessary, then it will develop new protocols within the working group; on the other hand, any extensions to existing pr= otocols would be done with interactions with other working groups where pos= sible.”

 

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

YOUNG>> Agree.

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv<= /o:p>

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F181dfweml706chm_-- From nobody Fri Sep 12 09:37:45 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C14B11A6FC7 for ; Fri, 12 Sep 2014 09:37:39 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kwpy4V95GcjC for ; Fri, 12 Sep 2014 09:37:31 -0700 (PDT) Received: from sesbmg23.ericsson.net (sesbmg23.ericsson.net [193.180.251.37]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C8BDD1A6FA1 for ; Fri, 12 Sep 2014 09:37:29 -0700 (PDT) X-AuditID: c1b4fb25-f791c6d00000617b-d3-54132147d76b Received: from ESESSHC016.ericsson.se (Unknown_Domain [153.88.253.124]) by sesbmg23.ericsson.net (Symantec Mail Security) with SMTP id 25.0B.24955.74123145; Fri, 12 Sep 2014 18:37:27 +0200 (CEST) Received: from ESESSMB301.ericsson.se ([169.254.1.77]) by ESESSHC016.ericsson.se ([153.88.183.66]) with mapi id 14.03.0174.001; Fri, 12 Sep 2014 18:37:27 +0200 From: Daniele Ceccarelli To: "BELOTTI, SERGIO (SERGIO)" , Leeyoung Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAAl1QIAAFp9Q Date: Fri, 12 Sep 2014 16:37:27 +0000 Message-ID: <4A1562797D64E44993C5CBF38CF1BE4812760363@ESESSMB301.ericsson.se> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> In-Reply-To: Accept-Language: it-IT, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [153.88.183.149] Content-Type: multipart/alternative; boundary="_000_4A1562797D64E44993C5CBF38CF1BE4812760363ESESSMB301erics_" MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprGIsWRmVeSWpSXmKPExsUyM+Jvja67onCIwbp2C4stPRfYLPpXnGGx mDbP1WLZ5t/sDiwerc/2snq0HHnL6rFkyU+mAOYoLpuU1JzMstQifbsErozul/tZChadZak4 8fILWwPj2w6WLkZODgkBE4k1PbfZIGwxiQv31gPZXBxCAkcZJdbOX8kK4SxmlPi8fhmQw8HB JmAl8eSQD0iDiECKxP4TR1lBbGYBT4n/Hx4ygtjCAnISXx+eYIeokZc49eUZM4QdJbHj1gOw xSwCqhJL2zeB1fMK+EpM+n2QCWLXS2aJP0++gQ3lFIiVmHh6L1gRo4CsxITdixghlolL3Hoy nwniagGJJXvOM0PYohIvH/9jhbCVJNYe3s4CUZ8vsfTeZTaIZYISJ2c+YZnAKDoLyahZSMpm ISmDiOtJ3Jg6hQ3C1pZYtvA1M4StKzHj3yEWZPEFjOyrGEWLU4uTctONjPVSizKTi4vz8/Ty Uks2MQIj8uCW36o7GC+/cTzEKMDBqMTDm2AlGCLEmlhWXJl7iFGag0VJnHfhuXnBQgLpiSWp 2ampBalF8UWlOanFhxiZODilGhjFpjgpTvwkI/G0a/HX4/3elQvk3UTv8IqlzXxy4j87r/ld z+V/RSTjeOa7+ElnqB15K+Z5r2FhKccDO8Fmt/vbw9s+/Gt9f7BdkF+oPnXRAeWLfYE+T418 Ps6NMD0ZnXaw/umN/H8srQvf/FmuxvLOLqmw7YD6Sefkkx6zvzBv9g8XzP8b6q3EUpyRaKjF XFScCADthIMsqQIAAA== Archived-At: http://mailarchive.ietf.org/arch/msg/actn/Urwro9QFFGwqSZX4esxXF7P9qZI Cc: "actn@ietf.org" , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 16:37:40 -0000 --_000_4A1562797D64E44993C5CBF38CF1BE4812760363ESESSMB301erics_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Good proposal Sergio, I like it. BR Daniele From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com] Sent: venerd=EC 12 settembre 2014 17:34 To: Leeyoung Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Daniele Please see in line . Thanks Sergio From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: venerd=EC 12 settembre 2014 17:08 To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized= signaling means. NMS based is one of the possibilities but it's not limite= d to NMS. A network implementing e.g. Open Flow or any other similar protoc= ol should be considered as well IMHO. Here I'm not sure whether we can spea= k about centralized signaling in both cases or not. In the case of NMS we u= se the management plane to dynamically provision connectivity (whatever pro= tocol is used). In the case of e.g. Open Flow can we speak about management= plane or is something else? Please note that I speak about OF as it's the = only example that comes to my mind but any other possibility can/must be co= nsidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." SB> I have still problems with this definition. In my view when you think a= bout to an NMS based path setup, I have a centralized station that is provi= ding command towards managed equipment functions that are virtualized in a = MIB , and these command provide the "resource reservation" phase (not only = but just to make the comparison with normal signaling protocol) using a "ve= rtical" management protocol . There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." 2. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draf= t saying what is centralized and what is distributed. E.g. VPN prefixes exc= hange could be distributed (controllers speaking MP-BGP with each other) wh= ile provisioning could be hierarchical (i.e. the coordinator asks controlle= r A to provision a path with domain A and asks controller B to provide a pa= th within B so to have an end to end path crossing domains A and B)...H-PCE= like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_4A1562797D64E44993C5CBF38CF1BE4812760363ESESSMB301erics_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Good proposal Sergio, = I like it.

 

BR
Daniele

 

From: BELOTTI,= SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com]
Sent: venerd=EC 12 settembre 2014 17:34
To: Leeyoung
Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Young, Daniele=

 

Please see in line .

 

Thanks

Sergio

 

 = ;

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 12 settembre 2014 17:08
To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Daniele,=

 

Thanks for providing y= our good comments here. Some of your comment (1) is for charter discussion = while the others (2 & 3) are architecture discussion. As a few folks ar= e already working on the architecture document, we may start a new email thread on architecture discussion while developin= g the draft.

 

Please see inline for = my response.

 

Regards,

Young

 

From: Daniele = Ceccarelli [mailto:danie= le.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@iet= f.org
Subject: RE: ACTN charter v1.0

 

Dhruv, Young,

 

Excellent progresses!<= o:p>

Let me just add some n= otes/questions.

I’m collecting t= hem here and not inline as the reading of the whole thread is becoming pret= ty complex.

 

1.&= nbsp;     On centralized= signaling: We need to clearly state what centralized signaling means. NMS = based is one of the possibilities but it’s not limited to NMS. A netw= ork implementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here I’m not sur= e whether we can speak about centralized signaling in both cases or not. In= the case of NMS we use the management plane to dynamically provision conne= ctivity (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plane or is somet= hing else? Please note that I speak about OF as it’s the only example= that comes to my mind but any other possibility can/must be considered.

 

YOUNG>> The inte= ntion here was giving some overview of the tools that current transport net= works have. Of course thing are quickly changing with other initiatives lik= e OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps good compromis= e would be putting NMS based as an example. How about restating like:<= /o:p>

 

Allow for distributed signaling or central= ized signaling (e.g., an NMS-based, etc.) for set up….”   

 

SB> I have still proble= ms with this definition. In my view when you think about to an NMS based pa= th setup, I have a centralized station that is providing command towards ma= naged equipment functions that are virtualized in a MIB , and these command provide the “resource reservation”= ; phase (not only but just to make the comparison with normal signaling pro= tocol) using a “vertical” management protocol .

There is no signaling in m= y view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

 

 

2.&= nbsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.<= o:p>

 

YOUNG>> These op= tions seem to be detailed architecture that the upcoming architecture docum= ent should address in detail. My personal opinion is that both architecture= s need to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial = baseline architecture.

 

3.&= nbsp;     Again on multi= odomain: maybe we could improve the architecture draft saying what is centr= alized and what is distributed. E.g. VPN prefixes exchange could be distrib= uted (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordi= nator asks controller A to provision a path with domain A and asks controll= er B to provide a path within B so to have an end to end path crossing doma= ins A and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

 

BR
Daniele

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 <= /o:p>

 <= /o:p>

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

----------------= ------------

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv<= /o:p>

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_4A1562797D64E44993C5CBF38CF1BE4812760363ESESSMB301erics_-- From nobody Fri Sep 12 12:01:44 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0459A1A7028 for ; Fri, 12 Sep 2014 12:01:43 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id MkoBjpdeQJF5 for ; Fri, 12 Sep 2014 12:01:36 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0D3FC1A86E2 for ; Fri, 12 Sep 2014 12:01:21 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml402-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJI93761; Fri, 12 Sep 2014 19:01:20 +0000 (GMT) Received: from DFWEML705-CHM.china.huawei.com (10.193.5.142) by lhreml402-hub.china.huawei.com (10.201.5.241) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 12 Sep 2014 20:01:16 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml705-chm ([10.193.5.142]) with mapi id 14.03.0158.001; Fri, 12 Sep 2014 12:01:09 -0700 From: Leeyoung To: Daniele Ceccarelli , "Varma, Eve L (Eve)" , Dhruv Dhody , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAABNQAIABdgnAgABBcpA= Date: Fri, 12 Sep 2014 19:01:07 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <6D32668528F93D449A073F45707153D82C4BE1D7@US70UWXCHMBA05.zam.alcatel-lucent.com> <4A1562797D64E44993C5CBF38CF1BE4812760054@ESESSMB301.ericsson.se> In-Reply-To: <4A1562797D64E44993C5CBF38CF1BE4812760054@ESESSMB301.ericsson.se> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/LPWMVTr1Z60rNXG647PS0sjLhVk Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 19:01:43 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3dfweml706chm_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Daniele, I think Segment Routing is a TE technique that can improve MPLS-TE networks= , but not sure if it in itself is a connection-oriented technologies. From = a signaling standpoint, it may be regarded as a derivative of MPLS-TE. Plea= se correct if I am wrong. Thanks, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Good catch Eve, Could we include also segment routing into the list of connection oriented = technologies? I don't know whether it could be considered as part of the MP= LS-TE or not (don't think so). BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve) Sent: gioved=EC 11 settembre 2014 18:09 To: Leeyoung; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi, Just a quick terminology comment - the wording below infers OTN is only L1,= when it is both L1 and L0 :) So I would suggest to reword as "This implie= s that at least the following transport networks are in scope of the discus= sion of this draft: Layer 1 (L1) and Layer 0 (L0) optical networks (e.g., O= TN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other emerging network tech= nologies with connection-oriented behavior". Best regards, Eve From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Thursday, September 11, 2014 11:17 AM To: Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Dhruv, Thanks for providing your valuable comment. Please see inline for my response. Thanks. Young From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3dfweml706chm_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Daniele,=

 

I think Segment Routin= g is a TE technique that can improve MPLS-TE networks, but not sure if it i= n itself is a connection-oriented technologies. From a signaling standpoint= , it may be regarded as a derivative of MPLS-TE. Please correct if I am wrong.

 

Thanks,

Young

 

From: Daniele = Ceccarelli [mailto:daniele.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Good catch Eve,=

 

Could we include also = segment routing into the list of connection oriented technologies? I don= 217;t know whether it could be considered as part of the MPLS-TE or not (do= n’t think so).

 

BR
Daniele

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve)
Sent: gioved=EC 11 settembre 2014 18:09
To: Leeyoung; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi,

 

Just a quick terminology comme= nt - the wording below infers OTN is only L1, when it is both L1 and L0 J  So I would suggest to reword as ̶= 0;This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) and Layer 0 (L0) optic= al networks (e.g., OTN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other e= merging network technologies with connection-oriented behavior”.

 

Best regards,

Eve

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Thursday, September 11, 2014 11:17 AM
To: Dhruv Dhody; actn@ietf.org<= br> Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dhruv,<= /o:p>

 

Thanks for providing y= our valuable comment.

 

Please see inline for = my response. Thanks.

 

Young

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.=

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-       Facilitate separ= ation of data plane and control plane,

-       Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-       High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-       Operator-driven use cases to address the following initial items= :

o   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o   Synchronization of network resources view across physical domain= controls and virtual network control.

o   Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-       Evaluation of Information model/data model to support the use ca= ses.

-       Requirements to support APIs/protocols, encoding languages, and = data models

-       Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-       Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

 

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3dfweml706chm_-- From nobody Fri Sep 12 12:11:13 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A3FB51A8547 for ; Fri, 12 Sep 2014 12:11:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3VWWpw1yeyAX for ; Fri, 12 Sep 2014 12:11:05 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by 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Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B60861A8707 for ; Fri, 12 Sep 2014 12:22:54 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml406-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMM55486; Fri, 12 Sep 2014 19:22:53 +0000 (GMT) Received: from DFWEML701-CHM.china.huawei.com (10.193.5.50) by lhreml406-hub.china.huawei.com (10.201.5.243) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 12 Sep 2014 20:22:52 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml701-chm ([10.193.5.50]) with mapi id 14.03.0158.001; Fri, 12 Sep 2014 12:22:41 -0700 From: Leeyoung To: "BELOTTI, SERGIO (SERGIO)" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAAl1QIAARW8Q Date: Fri, 12 Sep 2014 19:22:40 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2F30D@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F30Ddfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/8KABBjz7RaMHaap3ixgkCgNicUo Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 19:23:12 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F30Ddfweml706chm_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Sergio, I am OK with your suggested wording. Thanks. Young From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com] Sent: Friday, September 12, 2014 10:34 AM To: Leeyoung Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Daniele Please see in line . Thanks Sergio From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: venerd=EC 12 settembre 2014 17:08 To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized= signaling means. NMS based is one of the possibilities but it's not limite= d to NMS. A network implementing e.g. Open Flow or any other similar protoc= ol should be considered as well IMHO. Here I'm not sure whether we can spea= k about centralized signaling in both cases or not. In the case of NMS we u= se the management plane to dynamically provision connectivity (whatever pro= tocol is used). In the case of e.g. Open Flow can we speak about management= plane or is something else? Please note that I speak about OF as it's the = only example that comes to my mind but any other possibility can/must be co= nsidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." SB> I have still problems with this definition. In my view when you think a= bout to an NMS based path setup, I have a centralized station that is provi= ding command towards managed equipment functions that are virtualized in a = MIB , and these command provide the "resource reservation" phase (not only = but just to make the comparison with normal signaling protocol) using a "ve= rtical" management protocol . There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." 2. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draf= t saying what is centralized and what is distributed. E.g. VPN prefixes exc= hange could be distributed (controllers speaking MP-BGP with each other) wh= ile provisioning could be hierarchical (i.e. the coordinator asks controlle= r A to provision a path with domain A and asks controller B to provide a pa= th within B so to have an end to end path crossing domains A and B)...H-PCE= like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F30Ddfweml706chm_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Sergio, =

 

I am OK with your sugg= ested wording. Thanks.

 

Young

 

From: BELOTTI,= SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com]
Sent: Friday, September 12, 2014 10:34 AM
To: Leeyoung
Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Young, Daniele=

 

Please see in line .

 

Thanks

Sergio

 

 = ;

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 12 settembre 2014 17:08
To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Daniele,=

 

Thanks for providing y= our good comments here. Some of your comment (1) is for charter discussion = while the others (2 & 3) are architecture discussion. As a few folks ar= e already working on the architecture document, we may start a new email thread on architecture discussion while developin= g the draft.

 

Please see inline for = my response.

 

Regards,

Young

 

From: Daniele = Ceccarelli [mailto:danie= le.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@iet= f.org
Subject: RE: ACTN charter v1.0

 

Dhruv, Young,

 

Excellent progresses!<= o:p>

Let me just add some n= otes/questions.

I’m collecting t= hem here and not inline as the reading of the whole thread is becoming pret= ty complex.

 

1.&n= bsp;     On centralized= signaling: We need to clearly state what centralized signaling means. NMS = based is one of the possibilities but it’s not limited to NMS. A netw= ork implementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here I’m not sur= e whether we can speak about centralized signaling in both cases or not. In= the case of NMS we use the management plane to dynamically provision conne= ctivity (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plane or is somet= hing else? Please note that I speak about OF as it’s the only example= that comes to my mind but any other possibility can/must be considered.

 

YOUNG>> The inte= ntion here was giving some overview of the tools that current transport net= works have. Of course thing are quickly changing with other initiatives lik= e OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps good compromis= e would be putting NMS based as an example. How about restating like:<= /o:p>

 

Allow for distributed signaling or central= ized signaling (e.g., an NMS-based, etc.) for set up….”   

 

SB> I have still proble= ms with this definition. In my view when you think about to an NMS based pa= th setup, I have a centralized station that is providing command towards ma= naged equipment functions that are virtualized in a MIB , and these command provide the “resource reservation”= ; phase (not only but just to make the comparison with normal signaling pro= tocol) using a “vertical” management protocol .

There is no signaling in m= y view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

 

 

2.&n= bsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.

 

YOUNG>> These op= tions seem to be detailed architecture that the upcoming architecture docum= ent should address in detail. My personal opinion is that both architecture= s need to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial = baseline architecture.

 

3.&n= bsp;     Again on multi= odomain: maybe we could improve the architecture draft saying what is centr= alized and what is distributed. E.g. VPN prefixes exchange could be distrib= uted (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordi= nator asks controller A to provision a path with domain A and asks controll= er B to provide a path within B so to have an end to end path crossing doma= ins A and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

 

BR
Daniele

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 <= /o:p>

 <= /o:p>

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

----------------= ------------

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv<= /o:p>

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F30Ddfweml706chm_-- From nobody Fri Sep 12 12:50:22 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CE0061A00D2 for ; Fri, 12 Sep 2014 12:50:20 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.977 X-Spam-Level: X-Spam-Status: No, score=-1.977 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FM_FORGED_GMAIL=0.622, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id miPuyKJ6de_3 for ; Fri, 12 Sep 2014 12:50:18 -0700 (PDT) Received: from mail-lb0-f177.google.com (mail-lb0-f177.google.com [209.85.217.177]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 650401A00B7 for ; Fri, 12 Sep 2014 12:50:18 -0700 (PDT) Received: by mail-lb0-f177.google.com with SMTP id l4so1525957lbv.22 for ; Fri, 12 Sep 2014 12:50:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-type; bh=uzSKOsBX9xCr3HITQ8cE0jJp/10XTNL3ftJ0Cxh1f4g=; b=PTPIEpqsxnpIS5SLs0iCa64s/Zsthi3J5rdhwWjV9IPHjFd1fXJwe4wWGwkQMHdqeu mJFJbQ6W0cgn9iQjdqn3omWChrVU/hsnSLODimBLyIL4b9k2e+Fc2CQ5/3h62uQnII5e 3vOkvDo8/ZTBGIdxkeUc1lZWJkTvis0QJYk3i7yK63nKfcaD1xN/XDdLgp/eLG4YY9rE sO9HLrbdx1Felju9HtOOqcRjyvgxAjsJ1QVnUuYYj9uVcDkxfWW1FUc+9fQ7IWbZazus wAvAr6I4ooKbnfkeWNfavmqwPZBc8JSuSYc6GJXHhpRBDqOnZK18ouRGw6TblYWKY3/R kIjA== X-Gm-Message-State: ALoCoQnpT3995fSkRKF5+SheLy7K3Xib9JmMR7OjnLHMJoBbWcVzzD/4A0lhR5jHkKV2OZD/4t1a X-Received: by 10.152.170.130 with SMTP id am2mr11196786lac.78.1410551416639; Fri, 12 Sep 2014 12:50:16 -0700 (PDT) MIME-Version: 1.0 Received: by 10.112.84.11 with HTTP; Fri, 12 Sep 2014 12:49:56 -0700 (PDT) X-Originating-IP: [72.192.183.77] In-Reply-To: <4A1562797D64E44993C5CBF38CF1BE481276004B@ESESSMB301.ericsson.se> References: <4A1562797D64E44993C5CBF38CF1BE481276004B@ESESSMB301.ericsson.se> From: Mike Mossbarger Date: Fri, 12 Sep 2014 12:49:56 -0700 Message-ID: To: Daniele Ceccarelli Content-Type: multipart/alternative; boundary=089e0116156820648f0502e39804 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/-P6OJ4xeYrTW_c4X2piHN8mHOGc Cc: "actn@ietf.org" Subject: Re: [Actn] Joining the group X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 19:50:20 -0000 --089e0116156820648f0502e39804 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Danielle, Thanks for the response. I looked into both of those efforts and I don't see much related to bridging roots of trust across control domains. We are creating the type of documentation you mention as part of the testbed effort so I should be able to submit those once completed. Thanks again. Best, Michael Mossbarger Executive Director *ENT Foundation* *Resilient. Global. Identity.mike@ent.net * www.ENT.net 619-794-6677 Mobile On Fri, Sep 12, 2014 at 7:26 AM, Daniele Ceccarelli < daniele.ceccarelli@ericsson.com> wrote: > Hi Mike, > > > > Glad to hear there are always new use cases related to ACTN. It seems you= r > use case is something similar to security issues that have been addressed > in the past by the PCE and CCAMP WGs when speaking about connectivity > between PCEs from different vendors/operators or e.g. multi domain > signaling/routing. > > > > Maybe the issue can be solved with some pointer or references to existing > work or maybe it will need a dedicated effort from the ACTN community, bu= t > in any case it is worth having it noted down and tracked. My suggestion i= s > to write a draft with you use cases, specifying the issues to be addresse= d > and possibly an evaluation of existing mechanisms or contact the authors = of > an existing draft to ask to include it in an existing document. > > > > BR > Daniele > > > > *From:* ACTN [mailto:actn-bounces@ietf.org] *On Behalf Of *Mike Mossbarge= r > *Sent:* gioved=C3=AC 11 settembre 2014 18:34 > *To:* actn@ietf.org > *Subject:* [Actn] Joining the group > > > > Hello All, > > I am new to this conversation and was thrilled to find it so directly in > line with work that I am currently involved in at the Industrial Internet > Consortium. We have a use case on Connectivity that many of us are keen t= o > move towards a testbed - the problem is complex. > > One key factor that must be addressed are roots of trust used for > credentialing systems across these different domains. Abstraction in a > standard way can be achieved (with some work) but quantifying 'trust' > across domain boundaries requires common roots of trust so that > cryptographic substantiation of identity is uniform. There is work along > the lines of Roots of Trust for Cyber-Physical Systems going on at the > Cyber Security Research Alliance although their work is focused on PKI, a > cryptosystem that can't support cross-domain trust. > > > > Best, > > > > Michael Mossbarger > Executive Director > *ENT Foundation* > > > *Resilient. Global. Identity. mike@ent.net * > > > www.ENT.net > 619-794-6677 Mobile > --089e0116156820648f0502e39804 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi Danielle,

Thanks for the response. I looked into both= of those efforts and I don't see much related to bridging roots of tru= st across control domains. We are creating the type of documentation you me= ntion as part of the testbed effort so I should be able to submit those onc= e completed.

Thanks again.


Best,
=
=C2=A0
=
Michael Mo= ssbarger
Executive Director
ENT Foundation
<= /span>
Resilient. Global. Identity.
mike@ent.net

www.ENT.net
619-794-6677 Mobile


On Fri, Sep 12, 2014 at 7:26 AM, Daniele= Ceccarelli <daniele.ceccarelli@ericsson.com> = wrote:

Hi Mike,

=C2=A0

Glad to hear there are al= ways new use cases related to ACTN. It seems your use case is something sim= ilar to security issues that have been addressed in the past by the PCE and CCAMP WGs when speaking about connectivity between PCE= s from different vendors/operators or e.g. multi domain signaling/routing.<= u>

=C2=A0

Maybe the issue can be so= lved with some pointer or references to existing work or maybe it will need= a dedicated effort from the ACTN community, but in any case it is worth having it noted down and tracked. My suggestion is to wri= te a draft with you use cases, specifying the issues to be addressed and po= ssibly an evaluation of existing mechanisms or contact the authors of an ex= isting draft to ask to include it in an existing document.

=C2=A0

BR
Daniele

=C2=A0

From: ACTN [ma= ilto:actn-bounce= s@ietf.org] On Behalf Of Mike Mossbarger
Sent: gioved=C3=AC 11 settembre 2014 18:34
To: actn@ietf.org=
Subject: [Actn] Joining the group

=C2=A0

Hello All,<= /span>

I am new to this conversa= tion and was thrilled to find it so directly in line with work that I am cu= rrently involved in at the Industrial Internet Consortium. We have a use case on Connectivity that many of us are keen to move toward= s a testbed - the problem is complex.

One key factor that must be addressed are roots of trust= used for credentialing systems across these different domains. Abstraction= in a standard way can be achieved (with some work) but quantifying 'trust' across domain boundaries requires common roots= of trust so that cryptographic substantiation of identity is uniform. Ther= e is work along the lines of Roots of Trust for Cyber-Physical Systems goin= g on at the Cyber Security Research Alliance although their work is focused on PKI, a cryptosystem that can't suppo= rt cross-domain trust.

=C2=A0

Best,

=C2=A0

Michael Mossbarger
Executive Director
ENT Foundation

Resilient. Global. Identity.
mike@ent.net


www.ENT.net
619-794-6677 Mobile


--089e0116156820648f0502e39804-- From nobody Fri Sep 12 13:06:34 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9A75E1A006F for ; Fri, 12 Sep 2014 13:06:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.901 X-Spam-Level: X-Spam-Status: No, score=-1.901 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id o0SIHGkAbBeO for ; Fri, 12 Sep 2014 13:06:23 -0700 (PDT) Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2on0130.outbound.protection.outlook.com [207.46.100.130]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 78ABC1A004C for ; Fri, 12 Sep 2014 13:06:23 -0700 (PDT) Received: from BL2PR03MB372.namprd03.prod.outlook.com (10.141.89.15) by BL2PR03MB369.namprd03.prod.outlook.com (10.141.89.12) with Microsoft SMTP Server (TLS) id 15.0.1019.16; Fri, 12 Sep 2014 20:06:20 +0000 Received: from BL2PR03MB372.namprd03.prod.outlook.com ([10.141.89.15]) by BL2PR03MB372.namprd03.prod.outlook.com ([10.141.89.15]) with mapi id 15.00.1019.015; Fri, 12 Sep 2014 20:06:20 +0000 From: Luyuan Fang To: Leeyoung , Daniele Ceccarelli , "Varma, Eve L (Eve)" , Dhruv Dhody , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAABNQAIABdgnAgABBcpCAABs94A== Date: Fri, 12 Sep 2014 20:06:19 +0000 Message-ID: References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <6D32668528F93D449A073F45707153D82C4BE1D7@US70UWXCHMBA05.zam.alcatel-lucent.com> <4A1562797D64E44993C5CBF38CF1BE4812760054@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3@dfweml706-chm> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [173.70.160.102] x-microsoft-antispam: BCL:0;PCL:0;RULEID:;UriScan:; x-forefront-prvs: 0332AACBC3 x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(377454003)(164054003)(189002)(57704003)(37854004)(199003)(52604005)(66066001)(86612001)(81542001)(92566001)(95666004)(15202345003)(2656002)(77982001)(76482001)(76176999)(97736003)(64706001)(76576001)(81342001)(54356999)(99286002)(74316001)(33646002)(105586002)(107886001)(79102001)(90102001)(87936001)(19580395003)(80022001)(31966008)(83322001)(4396001)(106116001)(108616004)(86362001)(74502001)(101416001)(85852003)(93886004)(19609705001)(16236675004)(106356001)(19580405001)(20776003)(107046002)(19625215002)(99396002)(85306004)(2501002)(19300405004)(15975445006)(83072002)(46102001)(21056001)(74662001)(19617315012)(50986999)(24736002)(579004); DIR:OUT; SFP:1102; SCL:1; SRVR:BL2PR03MB369; H:BL2PR03MB372.namprd03.prod.outlook.com; FPR:; MLV:sfv; PTR:InfoNoRecords; MX:1; A:1; LANG:en; Content-Type: multipart/alternative; boundary="_000_c68119e7018a431897196eaad39ba0adBL2PR03MB372namprd03pro_" MIME-Version: 1.0 X-OriginatorOrg: microsoft.onmicrosoft.com Archived-At: http://mailarchive.ietf.org/arch/msg/actn/tqltf2KENpW9CpHYGkaoGd3yuYA Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 20:06:32 -0000 --_000_c68119e7018a431897196eaad39ba0adBL2PR03MB372namprd03pro_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I would not categorize segment routing as connection oriented in general. It can use IGP to distribute labels instead of LDP, RSVP, or BGP. In that c= ase, the packet simply follows IGP routes. When supporting TE, it may be considered as derivative or sub-set of MPLS-T= E. It is not fully defined yet. I'd say to leave it out for now. Thanks, Luyuan From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 3:01 PM To: Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, I think Segment Routing is a TE technique that can improve MPLS-TE networks= , but not sure if it in itself is a connection-oriented technologies. From = a signaling standpoint, it may be regarded as a derivative of MPLS-TE. Plea= se correct if I am wrong. Thanks, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Good catch Eve, Could we include also segment routing into the list of connection oriented = technologies? I don't know whether it could be considered as part of the MP= LS-TE or not (don't think so). BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve) Sent: gioved=EC 11 settembre 2014 18:09 To: Leeyoung; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi, Just a quick terminology comment - the wording below infers OTN is only L1,= when it is both L1 and L0 :) So I would suggest to reword as "This implie= s that at least the following transport networks are in scope of the discus= sion of this draft: Layer 1 (L1) and Layer 0 (L0) optical networks (e.g., O= TN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other emerging network tech= nologies with connection-oriented behavior". Best regards, Eve From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Thursday, September 11, 2014 11:17 AM To: Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Dhruv, Thanks for providing your valuable comment. Please see inline for my response. Thanks. Young From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and= protection, and - Provide traffic engineering mechanism via centralized path computa= tion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks t= o enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use case= s. - Requirements to support APIs/protocols, encoding languages, and da= ta models - Gap analysis of existing IETF and other protocols, encoding langua= ges and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_c68119e7018a431897196eaad39ba0adBL2PR03MB372namprd03pro_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I would not categorize= segment routing as connection oriented in general.

It can use IGP to dist= ribute labels instead of LDP, RSVP, or BGP. In that case, the packet simply= follows IGP routes.

When supporting TE, it= may be considered as derivative or sub-set of MPLS-TE. It is not fully def= ined yet.

I’d say to leave= it out for now.

 

Thanks,

Luyuan

 

From: ACTN [mailto:actn-bounces@ietf.org] = On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 3:01 PM
To: Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; actn@ietf.o= rg
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Daniele,=

 

I think Segment Routin= g is a TE technique that can improve MPLS-TE networks, but not sure if it i= n itself is a connection-oriented technologies. From a signaling standpoint= , it may be regarded as a derivative of MPLS-TE. Please correct if I am wrong.

 

Thanks,

Young

 

From: Daniele = Ceccarelli [mailto:danie= le.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Good catch Eve,=

 

Could we include also = segment routing into the list of connection oriented technologies? I don= 217;t know whether it could be considered as part of the MPLS-TE or not (do= n’t think so).

 

BR
Daniele

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve)
Sent: gioved=EC 11 settembre 2014 18:09
To: Leeyoung; Dhruv Dhody; actn@iet= f.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi,

 

Just a quick terminology comme= nt - the wording below infers OTN is only L1, when it is both L1 and L0 J  So I would suggest to reword as ̶= 0;This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) and Layer 0 (L0) optic= al networks (e.g., OTN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other e= merging network technologies with connection-oriented behavior”.

 

Best regards,

Eve

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Thursday, September 11, 2014 11:17 AM
To: Dhruv Dhody; actn@ietf.org<= br> Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dhruv,<= /o:p>

 

Thanks for providing y= our valuable comment.

 

Please see inline for = my response. Thanks.

 

Young

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.=

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-        Facilitate separ= ation of data plane and control plane,

-        Allow for distri= buted or centralized signaling  for path setup and protection, and

-        Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-        High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-        Operator-driven use cases to address the following initial items= :

o   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o   Synchronization of network resources view across physical domain= controls and virtual network control.

o   Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-        Evaluation of Information model/data model to support the use ca= ses.

-        Requirements to support APIs/protocols, encoding languages, and = data models

-        Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-        Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

 

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nobody Fri Sep 12 14:25:42 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B79311A00F6 for ; Fri, 12 Sep 2014 14:25:40 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 9X6gO6hSEUaY for ; Fri, 12 Sep 2014 14:25:30 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 1FE7E1A00A7 for ; Fri, 12 Sep 2014 14:25:28 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml403-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMM60638; Fri, 12 Sep 2014 21:25:27 +0000 (GMT) Received: from DFWEML701-CHM.china.huawei.com (10.193.5.50) by lhreml403-hub.china.huawei.com (10.201.5.217) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 12 Sep 2014 22:25:25 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml701-chm ([10.193.5.50]) with mapi id 14.03.0158.001; Fri, 12 Sep 2014 14:25:23 -0700 From: Leeyoung To: "actn@ietf.org" Thread-Topic: ACTN charter v1.1 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAABNQAIABdgnAgABBcpCAADK24A== Date: Fri, 12 Sep 2014 21:25:22 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2F3B0@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <6D32668528F93D449A073F45707153D82C4BE1D7@US70UWXCHMBA05.zam.alcatel-lucent.com> <4A1562797D64E44993C5CBF38CF1BE4812760054@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3@dfweml706-chm> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/mixed; boundary="_005_7AEB3D6833318045B4AE71C2C87E8E1729C2F3B0dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/fFNLbe-NmXN3xzbXeel_yMeLhy4 Subject: [Actn] ACTN charter v1.1 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 21:25:41 -0000 --_005_7AEB3D6833318045B4AE71C2C87E8E1729C2F3B0dfweml706chm_ Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F3B0dfweml706chm_" --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F3B0dfweml706chm_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, We have had pretty good discussions on ACTN charter 1.0. Thanks to all who = provided good comments and suggestions. At the close of the week, I had chance to update the charter (v1.1) based o= n agree-upon discussion points (there are still some unresolved points). Here's the output. Please refer to this version for any subsequent discussi= ons. Also attached is the Word document that shows the diff marks. I may ha= ve missed some points you raised. Please raise them again if that is the ca= se. Thanks & have a good weekend! Young From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 2:01 PM To: Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, I think Segment Routing is a TE technique that can improve MPLS-TE networks= , but not sure if it in itself is a connection-oriented technologies. From = a signaling standpoint, it may be regarded as a derivative of MPLS-TE. Plea= se correct if I am wrong. Thanks, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Good catch Eve, Could we include also segment routing into the list of connection oriented = technologies? I don't know whether it could be considered as part of the MP= LS-TE or not (don't think so). BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve) Sent: gioved=EC 11 settembre 2014 18:09 To: Leeyoung; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi, Just a quick terminology comment - the wording below infers OTN is only L1,= when it is both L1 and L0 :) So I would suggest to reword as "This implie= s that at least the following transport networks are in scope of the discus= sion of this draft: Layer 1 (L1) and Layer 0 (L0) optical networks (e.g., O= TN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other emerging network tech= nologies with connection-oriented behavior". Best regards, Eve From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Thursday, September 11, 2014 11:17 AM To: Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Dhruv, Thanks for providing your valuable comment. Please see inline for my response. Thanks. Young From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F3B0dfweml706chm_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi,<= /p>

 

We have had pretty goo= d discussions on ACTN charter 1.0. Thanks to all who provided good comments= and suggestions.

 

At the close of the we= ek, I had chance to update the charter (v1.1) based on agree-upon discussio= n points (there are still some unresolved points).  =

Here’s the outpu= t. Please refer to this version for any subsequent discussions. Also attach= ed is the Word document that shows the diff marks. I may have missed some p= oints you raised. Please raise them again if that is the case.

 

Thanks & have a go= od weekend!

 

Young

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 2:01 PM
To: Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; actn@ietf.o= rg
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Daniele,=

 

I think Segment Routin= g is a TE technique that can improve MPLS-TE networks, but not sure if it i= n itself is a connection-oriented technologies. From a signaling standpoint= , it may be regarded as a derivative of MPLS-TE. Please correct if I am wrong.

 

Thanks,

Young

 

From: Daniele = Ceccarelli [mailto:daniele.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Good catch Eve,=

 

Could we include also = segment routing into the list of connection oriented technologies? I don= 217;t know whether it could be considered as part of the MPLS-TE or not (do= n’t think so).

 

BR
Daniele

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve)
Sent: gioved=EC 11 settembre 2014 18:09
To: Leeyoung; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi,

 

Just a quick terminology comme= nt - the wording below infers OTN is only L1, when it is both L1 and L0 J  So I would suggest to reword as ̶= 0;This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) and Layer 0 (L0) optic= al networks (e.g., OTN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other e= merging network technologies with connection-oriented behavior”.

 

Best regards,

Eve

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Thursday, September 11, 2014 11:17 AM
To: Dhruv Dhody; actn@ietf.org<= br> Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dhruv,<= /o:p>

 

Thanks for providing y= our valuable comment.

 

Please see inline for = my response. Thanks.

 

Young

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.=

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-       Facilitate separ= ation of data plane and control plane,

-       Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-       High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-       Operator-driven use cases to address the following initial items= :

o   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o   Synchronization of network resources view across physical domain= controls and virtual network control.

o   Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-       Evaluation of Information model/data model to support the use ca= ses.

-       Requirements to support APIs/protocols, encoding languages, and = data models

-       Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-       Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

 

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No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id H3Ouu-bhD3Ys for ; Fri, 12 Sep 2014 14:48:47 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A0B3B1A00F6 for ; Fri, 12 Sep 2014 14:48:45 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml401-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMM61599; Fri, 12 Sep 2014 21:48:44 +0000 (GMT) Received: from DFWEML704-CHM.china.huawei.com (10.193.5.141) by lhreml401-hub.china.huawei.com (10.201.5.240) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 12 Sep 2014 22:48:43 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml704-chm ([10.193.5.141]) with mapi id 14.03.0158.001; Fri, 12 Sep 2014 14:48:32 -0700 From: Leeyoung To: Luyuan Fang , Daniele Ceccarelli , "Varma, Eve L (Eve)" , Dhruv Dhody , "actn@ietf.org" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAABNQAIABdgnAgABBcpCAABs94IAAIGHg Date: Fri, 12 Sep 2014 21:48:31 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C2F3FF@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <6D32668528F93D449A073F45707153D82C4BE1D7@US70UWXCHMBA05.zam.alcatel-lucent.com> <4A1562797D64E44993C5CBF38CF1BE4812760054@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F2C3@dfweml706-chm> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.195] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F3FFdfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/ATGqDFvr8mR5efJyccOE5skC5iA Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 21:48:53 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F3FFdfweml706chm_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Luyuan, Good point. Thanks. Young From: Luyuan Fang [mailto:lufang@microsoft.com] Sent: Friday, September 12, 2014 3:06 PM To: Leeyoung; Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; actn@iet= f.org Subject: RE: ACTN charter v1.0 I would not categorize segment routing as connection oriented in general. It can use IGP to distribute labels instead of LDP, RSVP, or BGP. In that c= ase, the packet simply follows IGP routes. When supporting TE, it may be considered as derivative or sub-set of MPLS-T= E. It is not fully defined yet. I'd say to leave it out for now. Thanks, Luyuan From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 3:01 PM To: Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, I think Segment Routing is a TE technique that can improve MPLS-TE networks= , but not sure if it in itself is a connection-oriented technologies. From = a signaling standpoint, it may be regarded as a derivative of MPLS-TE. Plea= se correct if I am wrong. Thanks, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Good catch Eve, Could we include also segment routing into the list of connection oriented = technologies? I don't know whether it could be considered as part of the MP= LS-TE or not (don't think so). BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve) Sent: gioved=EC 11 settembre 2014 18:09 To: Leeyoung; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi, Just a quick terminology comment - the wording below infers OTN is only L1,= when it is both L1 and L0 :) So I would suggest to reword as "This implie= s that at least the following transport networks are in scope of the discus= sion of this draft: Layer 1 (L1) and Layer 0 (L0) optical networks (e.g., O= TN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other emerging network tech= nologies with connection-oriented behavior". Best regards, Eve From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Thursday, September 11, 2014 11:17 AM To: Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Dhruv, Thanks for providing your valuable comment. Please see inline for my response. Thanks. Young From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and= protection, and - Provide traffic engineering mechanism via centralized path computa= tion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks t= o enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use case= s. - Requirements to support APIs/protocols, encoding languages, and da= ta models - Gap analysis of existing IETF and other protocols, encoding langua= ges and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F3FFdfweml706chm_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Luyuan,<= /span>

 

Good point. Thanks.

 

Young

 

From: Luyuan F= ang [mailto:lufang@microsoft.com]
Sent: Friday, September 12, 2014 3:06 PM
To: Leeyoung; Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; a= ctn@ietf.org
Subject: RE: ACTN charter v1.0

 

I would not categorize= segment routing as connection oriented in general.

It can use IGP to dist= ribute labels instead of LDP, RSVP, or BGP. In that case, the packet simply= follows IGP routes.

When supporting TE, it= may be considered as derivative or sub-set of MPLS-TE. It is not fully def= ined yet.

I’d say to leave= it out for now.

 

Thanks,

Luyuan

 

From: ACTN [mailto:actn-bounces@ietf.org] = On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 3:01 PM
To: Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; actn@ietf.o= rg
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Daniele,=

 

I think Segment Routin= g is a TE technique that can improve MPLS-TE networks, but not sure if it i= n itself is a connection-oriented technologies. From a signaling standpoint= , it may be regarded as a derivative of MPLS-TE. Please correct if I am wrong.

 

Thanks,

Young

 

From: Daniele = Ceccarelli [mailto:danie= le.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Good catch Eve,=

 

Could we include also = segment routing into the list of connection oriented technologies? I don= 217;t know whether it could be considered as part of the MPLS-TE or not (do= n’t think so).

 

BR
Daniele

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve)
Sent: gioved=EC 11 settembre 2014 18:09
To: Leeyoung; Dhruv Dhody; actn@iet= f.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi,

 

Just a quick terminology comme= nt - the wording below infers OTN is only L1, when it is both L1 and L0 J  So I would suggest to reword as ̶= 0;This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) and Layer 0 (L0) optic= al networks (e.g., OTN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other e= merging network technologies with connection-oriented behavior”.

 

Best regards,

Eve

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Thursday, September 11, 2014 11:17 AM
To: Dhruv Dhody; actn@ietf.org<= br> Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dhruv,<= /o:p>

 

Thanks for providing y= our valuable comment.

 

Please see inline for = my response. Thanks.

 

Young

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.=

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-       = ; Facilitate separation of data plane and = control plane,

-       = ; Allow for distributed or centralized sig= naling  for path setup and protection, and

-       = ; Provide traffic engineering mechanism vi= a centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-      &nbs= p; High-level ar= chitecture that describes the basic building blocks to enable transport net= work virtualization to support use cases.

-      &nbs= p; Operator-driv= en use cases to address the following initial items:

o   Virtual netwo= rk control and operation for core transport Packet Optical Integration (POI= ). (e.g., MPLS-TP, OTN/WSON)

o   Virtual netwo= rk control and operation for mobile backhaul multi-technology transport (e.= g., MPLS-TP and MPLS/OTN)

o   Data Center O= perator’s interconnection with optical transport network infrastructu= re providers to support dynamic virtual circuit services.

o   Multi-tenant = support to allow virtual network information query, virtual network negotia= tion, creation/deletion and modification.

o   Synchronizati= on of network resources view across physical domain controls and virtual ne= twork control.

o   Dynamic service control and = monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-      &nbs= p; Evaluation of= Information model/data model to support the use cases.

-      &nbs= p; Requirements = to support APIs/protocols, encoding languages, and data models<= /o:p>

-      &nbs= p; Gap analysis = of existing IETF and other protocols, encoding languages and data models to= fulfill the requirements.

-      &nbs= p; Protocol exte= nsions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

 

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C2F3FFdfweml706chm_-- From nobody Fri Sep 12 15:26:37 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C1D531A00B2 for ; Fri, 12 Sep 2014 15:26:34 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.551 X-Spam-Level: X-Spam-Status: No, score=-3.551 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-1.652] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id G1_Kob2fRyOQ for ; Fri, 12 Sep 2014 15:26:23 -0700 (PDT) Received: from mail3.advaoptical.com (mail3.advaoptical.com [74.202.24.82]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 3711F1A004C for ; Fri, 12 Sep 2014 15:26:23 -0700 (PDT) Received: from atl-srv-mail10.atl.advaoptical.com (atl-srv-mail10.atl.advaoptical.com [172.16.5.39]) by atl-vs-fsmail.advaoptical.com (8.14.5/8.14.5) with ESMTP id s8CMQD2i027557 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Fri, 12 Sep 2014 18:26:13 -0400 Received: from ATL-SRV-MBX1.advaoptical.com (172.16.5.45) by atl-srv-mail10.atl.advaoptical.com (172.16.5.39) with Microsoft SMTP Server (TLS) id 14.3.181.6; Fri, 12 Sep 2014 18:26:13 -0400 Received: from ATL-SRV-MBX1.advaoptical.com (172.16.5.45) by ATL-SRV-MBX1.advaoptical.com (172.16.5.45) with Microsoft SMTP Server (TLS) id 15.0.995.29; Fri, 12 Sep 2014 18:26:12 -0400 Received: from ATL-SRV-MBX1.advaoptical.com ([fe80::6433:f8f:ea41:a6e1]) by ATL-SRV-MBX1.advaoptical.com ([fe80::6433:f8f:ea41:a6e1%14]) with mapi id 15.00.0995.028; Fri, 12 Sep 2014 18:26:12 -0400 From: Aihua Guo To: Leeyoung , "BELOTTI, SERGIO (SERGIO)" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAAl1QIAARW8QgAATiLA= Date: Fri, 12 Sep 2014 22:26:12 +0000 Message-ID: References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <7AEB3D6833318045B4AE71C2C87E8E1729C2F30D@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C2F30D@dfweml706-chm> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.16.5.49] Content-Type: multipart/alternative; boundary="_000_fe537ac16d21465c949196c6b3d8eb32ATLSRVMBX1advaopticalco_" MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.12.52, 1.0.28, 0.0.0000 definitions=2014-09-12_07:2014-09-12,2014-09-12,1970-01-01 signatures=0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/NO0cymUIrajE9W0MOHkvcJal7gM Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 22:26:35 -0000 --_000_fe537ac16d21465c949196c6b3d8eb32ATLSRVMBX1advaopticalco_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Sergio, Regarding your comment, "There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." " Today with e.g. PCEP extensions carrying service related information, servi= ce provisioning requests may be issued from a centralized controller to all= network elements vertically and in parallel. This is IMHO one form of cent= ralized signaling. Service provisioning can be made through NMS, and NMS may or may not includ= e service related information in the management protocols. Hence I still se= e a difference between NMS based and centralized signaling. Would it be wor= th to reflect the difference in the wording with something like this: ? "Allow for distributed signaling or centralized model (e.g.an NMS-based or = centralized signaling) for set up...." Thanks. Aihua From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 3:23 PM To: BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Sergio, I am OK with your suggested wording. Thanks. Young From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com] Sent: Friday, September 12, 2014 10:34 AM To: Leeyoung Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Daniele Please see in line . Thanks Sergio From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: venerd=EC 12 settembre 2014 17:08 To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized= signaling means. NMS based is one of the possibilities but it's not limite= d to NMS. A network implementing e.g. Open Flow or any other similar protoc= ol should be considered as well IMHO. Here I'm not sure whether we can spea= k about centralized signaling in both cases or not. In the case of NMS we u= se the management plane to dynamically provision connectivity (whatever pro= tocol is used). In the case of e.g. Open Flow can we speak about management= plane or is something else? Please note that I speak about OF as it's the = only example that comes to my mind but any other possibility can/must be co= nsidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." SB> I have still problems with this definition. In my view when you think a= bout to an NMS based path setup, I have a centralized station that is provi= ding command towards managed equipment functions that are virtualized in a = MIB , and these command provide the "resource reservation" phase (not only = but just to make the comparison with normal signaling protocol) using a "ve= rtical" management protocol . There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." 2. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draf= t saying what is centralized and what is distributed. E.g. VPN prefixes exc= hange could be distributed (controllers speaking MP-BGP with each other) wh= ile provisioning could be hierarchical (i.e. the coordinator asks controlle= r A to provision a path with domain A and asks controller B to provide a pa= th within B so to have an end to end path crossing domains A and B)...H-PCE= like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optica= l Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-techno= logy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network = infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtu= al network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contr= ols and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_fe537ac16d21465c949196c6b3d8eb32ATLSRVMBX1advaopticalco_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Sergio,<= /span>

 

Regarding your comment= ,

“There is no signaling in my view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

”

 

Today with e.g. PCEP e= xtensions carrying service related information, service provisioning reques= ts may be issued from a centralized controller to all network elements vert= ically and in parallel. This is IMHO one form of centralized signaling.

 

Service provisioning c= an be made through NMS, and NMS may or may not include service related info= rmation in the management protocols. Hence I still see a difference between= NMS based and centralized signaling. Would it be worth to reflect the difference in the wording with something = like this: ?

 

“A= llow for distributed signaling or centralized model (e.g.an NMS-based or ce= ntralized signaling) for set up….”

 

Thanks.

Aihua

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 3:23 PM
To: BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Sergio, =

 

I am OK with your sugg= ested wording. Thanks.

 

Young

 

From: BELOTTI,= SERGIO (SERGIO) [mail= to:sergio.belotti@alcatel-lucent.com]
Sent: Friday, September 12, 2014 10:34 AM
To: Leeyoung
Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Young, Daniele=

 

Please see in line .

 

Thanks

Sergio

 

 = ;

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 12 settembre 2014 17:08
To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Daniele,=

 

Thanks for providing y= our good comments here. Some of your comment (1) is for charter discussion = while the others (2 & 3) are architecture discussion. As a few folks ar= e already working on the architecture document, we may start a new email thread on architecture discussion while developin= g the draft.

 

Please see inline for = my response.

 

Regards,

Young

 

From: Daniele = Ceccarelli [mailto:danie= le.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@iet= f.org
Subject: RE: ACTN charter v1.0

 

Dhruv, Young,

 

Excellent progresses!<= o:p>

Let me just add some n= otes/questions.

I’m collecting t= hem here and not inline as the reading of the whole thread is becoming pret= ty complex.

 

1.&n= bsp;     On centralized= signaling: We need to clearly state what centralized signaling means. NMS = based is one of the possibilities but it’s not limited to NMS. A netw= ork implementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here I’m not sur= e whether we can speak about centralized signaling in both cases or not. In= the case of NMS we use the management plane to dynamically provision conne= ctivity (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plane or is somet= hing else? Please note that I speak about OF as it’s the only example= that comes to my mind but any other possibility can/must be considered.

 

YOUNG>> The inte= ntion here was giving some overview of the tools that current transport net= works have. Of course thing are quickly changing with other initiatives lik= e OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps good compromis= e would be putting NMS based as an example. How about restating like:<= /o:p>

 

Allow for distributed signaling or central= ized signaling (e.g., an NMS-based, etc.) for set up….”   

 

SB> I have still proble= ms with this definition. In my view when you think about to an NMS based pa= th setup, I have a centralized station that is providing command towards ma= naged equipment functions that are virtualized in a MIB , and these command provide the “resource reservation”= ; phase (not only but just to make the comparison with normal signaling pro= tocol) using a “vertical” management protocol .

There is no signaling in m= y view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

 

 

2.&n= bsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.

 

YOUNG>> These op= tions seem to be detailed architecture that the upcoming architecture docum= ent should address in detail. My personal opinion is that both architecture= s need to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial = baseline architecture.

 

3.&n= bsp;     Again on multi= odomain: maybe we could improve the architecture draft saying what is centr= alized and what is distributed. E.g. VPN prefixes exchange could be distrib= uted (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordi= nator asks controller A to provision a path with domain A and asks controll= er B to provide a path within B so to have an end to end path crossing doma= ins A and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

 

BR
Daniele

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 <= /o:p>

 <= /o:p>

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

----------------= ------------

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv<= /o:p>

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-Facilitate separ= ation of data plane and control plane,

-Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.=

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o  &nbs= p; Synchronization of network resources view across physical domain= controls and virtual network control.

o  &nbs= p; Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

&nb= sp;

--_000_fe537ac16d21465c949196c6b3d8eb32ATLSRVMBX1advaopticalco_-- From nobody Fri Sep 12 15:46:47 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 48A091A00A6 for ; Fri, 12 Sep 2014 15:46:43 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.277 X-Spam-Level: X-Spam-Status: No, score=-1.277 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, FM_FORGED_GMAIL=0.622, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, SPF_PASS=-0.001] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LxgeCzlX8qqs for ; Fri, 12 Sep 2014 15:46:39 -0700 (PDT) Received: from mail-ig0-x22d.google.com (mail-ig0-x22d.google.com [IPv6:2607:f8b0:4001:c05::22d]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0E2B81A0077 for ; Fri, 12 Sep 2014 15:46:39 -0700 (PDT) Received: by mail-ig0-f173.google.com with SMTP id l13so1338266iga.6 for ; Fri, 12 Sep 2014 15:46:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=7O+ecyzZ88trTosp2q1p8HoIqBL1vQdM0Gy2POEAyHg=; b=d7Ppozo7EmSKATJaGLmO5/fHn6A08kb5NT/BpEzy0U4JuLHqeBIT1OqNiiBwIE8c1K BSHVixiH926fe99k7IulCHoDI8iFepOFCmCBeM5xJw/jJRH4NcOyJqhLc4KZLhigfpfU Fh3TYw6Oqqk1cYBexFWNK/FVvQHvfx2MGA5MMsUpqlsh5a3lvUQumEcnI8exJAJTU9ys 31H4amrJRt/ggW2khfrHBX3MxmGgtRIQJfmc584M/HsKgq/+FDkxFtZV7h8RynUwoCQ2 lyvLNTQXTOIJNsuOcfkGsRW8M5lKMvu4dVneHdWh6DBdaIh8Cg3a+qajh02D8qD9ysjf Zw5g== MIME-Version: 1.0 X-Received: by 10.43.65.12 with SMTP id xk12mr13049556icb.9.1410561998304; Fri, 12 Sep 2014 15:46:38 -0700 (PDT) Sender: yang.r.yang@gmail.com Received: by 10.107.10.134 with HTTP; Fri, 12 Sep 2014 15:46:38 -0700 (PDT) In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> Date: Fri, 12 Sep 2014 18:46:38 -0400 X-Google-Sender-Auth: SMht7YEVkScwOxyKbc4Nv8LlC6g Message-ID: From: "Y. Richard Yang" To: Leeyoung Content-Type: multipart/alternative; boundary=bcaec51d218cd7be690502e60e68 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/T4cREsDDq3Qu-hiFVyQ_YjiEsuY Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Sep 2014 22:46:43 -0000 --bcaec51d218cd7be690502e60e68 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Young, all, This sure is an active list and it is a bit hard to jump to the discussion! I read charter v1.1 and the discussions followed on the changes. Here are some early comments: - The current version appears to trying to do both (1) imposing an architecture and (2) leaving architecture to the architecture document. For example, I see multiple types of controllers (physical controller for a domain, coordinator for physical controllers, tenant controller for a tenant, ...). I also already see how they may interact (e.g., the hierarchy paragraph). Some email discussion start to touch on this issue. My preference is that it is better to leave the architecture as much as possible to the architecture document, to avoid confusion, because there are so many possibilities (e.g., a controller might be represented by two functions, one for abstraction, one for control), unless the mailing list can reach some agreement soon. - In the document, the word "abstraction" is a keyword, and it is different from "control", which is the other keyword. I am fine with keeping the meaning of abstraction somehow vague, but it may become confusing when there is too much overloading. For example, according to this sentence, "the creation of a virtualized environment allowing operators to view and control multi-subnet, multi-technology, multi-vendor domain networks", abstraction is similar to "view". Then, the following sentence "Abstraction of transport networks also allows operators to consolidate their network services into multi-tenant virtual transport networks." appears to assign abstraction a much stronger meaning. I would suggest revision to keep the meaning of the keywords simple. - The charter uses the word "virtualized" quite a few times. I found that they appear to have different meanings. For example, in this sentence, "Well-defined use cases from operators perspective with clearly stated need for transport network virtualization", does "virtualization" mean abstraction? For this sentence, "a centralized virtual network operation", I cannot fully understand the meaning of the word "virtual". For this sentence, "Multi-tenant support to allow virtual network information query", it appears that virtual means an overlay network, right? - Increasingly, "abstraction" in networking appears to mean (declarative) information model/data models, and this is what I read from this document as well. But abstraction can mean a lot more. A good starting point is the wiki doc (http://en.wikipedia.org/wiki/Abstraction_(computer_science)). I hope that the charter can be stated slightly more broadly (e.g., by stating that the WG will document the challenges of abstracting complex behaviors of transport networks, and identify potential related techniques). Richard On Fri, Sep 12, 2014 at 11:07 AM, Leeyoung wrote: > Hi Daniele, > > > > Thanks for providing your good comments here. Some of your comment (1) is > for charter discussion while the others (2 & 3) are architecture > discussion. As a few folks are already working on the architecture > document, we may start a new email thread on architecture discussion whil= e > developing the draft. > > > > Please see inline for my response. > > > > Regards, > > Young > > > > *From:* Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] > *Sent:* Friday, September 12, 2014 9:27 AM > *To:* Dhruv Dhody; Leeyoung; actn@ietf.org > *Subject:* RE: ACTN charter v1.0 > > > > Dhruv, Young, > > > > Excellent progresses! > > Let me just add some notes/questions. > > I=E2=80=99m collecting them here and not inline as the reading of the who= le thread > is becoming pretty complex. > > > > 1. On centralized signaling: We need to clearly state what > centralized signaling means. NMS based is one of the possibilities but it= =E2=80=99s > not limited to NMS. A network implementing e.g. Open Flow or any other > similar protocol should be considered as well IMHO. Here I=E2=80=99m not = sure > whether we can speak about centralized signaling in both cases or not. In > the case of NMS we use the management plane to dynamically provision > connectivity (whatever protocol is used). In the case of e.g. Open Flow c= an > we speak about management plane or is something else? Please note that I > speak about OF as it=E2=80=99s the only example that comes to my mind but= any other > possibility can/must be considered. > > > > YOUNG>> The intention here was giving some overview of the tools that > current transport networks have. Of course thing are quickly changing wit= h > other initiatives like OF and even PCE based signaling in a research circ= le > that can be viewed as centralized signaling. Perhaps good compromise woul= d > be putting NMS based as an example. How about restating like: > > > > Allow for distributed signaling or centralized signaling (e.g., an > NMS-based, etc.) for set up=E2=80=A6.=E2=80=9D > > > > > > 2. On multidomain issues: One question here: How do we want to > manage multi-domain? I see two ways: > > a. A coordinator of virtual network controllers =E2=80=93 i.e. 1:1 > relationship between virtual network controller and physical network > controller plus a coordinator of virtual network controllers on top > > b. A coordinator of physical network controllers =E2=80=93 i.e. a > coordinator of physical network controllers (1:N relationship between > coordinator and PNCs) with a virtual network controller on top? (1:1 > relationship between PNC coordinator and the VNC) > > Maybe we should consider both architectures, maybe pick one. > > > > YOUNG>> These options seem to be detailed architecture that the upcoming > architecture document should address in detail. My personal opinion is th= at > both architectures need to be considered as a starting point. There may b= e > other variations. Then we may narrow the scope as an initial baseline > architecture. > > > > 3. Again on multiodomain: maybe we could improve the architecture > draft saying what is centralized and what is distributed. E.g. VPN prefix= es > exchange could be distributed (controllers speaking MP-BGP with each othe= r) > while provisioning could be hierarchical (i.e. the coordinator asks > controller A to provision a path with domain A and asks controller B to > provide a path within B so to have an end to end path crossing domains A > and B)=E2=80=A6H-PCE like. > > > > YOUNG>> Good point. I agree that the architecture draft should discuss > these dichotomy of control regimes (e.g., centralized vs. distributed). O= ne > question I have: are you assuming the coordinator also speaks MP-BGP with > lower level PN controllers? If not, would the coordinator need to collect > the VPN prefixes using the interface between the coordinator and each PNC > (that speaks MP-BGP)? Then can this be viewed as a centralized component? > > > > BR > Daniele > > > > *From:* ACTN [mailto:actn-bounces@ietf.org] *On Behalf Of *Dhruv Dhody > *Sent:* venerd=C3=AC 12 settembre 2014 04:33 > *To:* Leeyoung; actn@ietf.org > *Subject:* Re: [Actn] ACTN charter v1.0 > > > > Hi Young, > > > > Please see inline.. > > > > *From:* Dhruv Dhody > *Sent:* Wednesday, September 10, 2014 10:48 PM > *To:* Leeyoung; Leeyoung; actn@ietf.org > *Subject:* RE: ACTN charter v1.0 > > > > Hi Young, > > > > Please find some comments on the proposed charter. > > > > * Do we need some text in charter also to specify what we consider as > Transport networks? > > > > YOUNG>> That may clarify the scope. Do you have any suggestion? One > definition from the Problem Statement draft ( > https://datatracker.ietf.org/doc/draft-leeking-actn-problem-statement/) > is as follows. Would this be good enough or need more work? > > > > Transport networks are defined as network infrastructure that > > provides connectivity and bandwidth for customer services. They > > are characterized by their ability to support server layer > > provisioning and traffic engineering for client layer services, > > such that resource guarantees may be provided to their customers. > > Transport networks in this document refer to a set of different > > type of connection-oriented networks, which include Connection- > > Oriented Circuit Switched (CO-CS) networks and Connection- > > Oriented Packet Switched (CO-PS) networks. This implies that at > > least the following transport networks are in scope of the > > discussion of this draft: Layer 1 (L1) optical networks (e.g., > > Optical Transport Networks (OTN) and Wavelength Switched Optical > > Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging > > network technologies with connection-oriented behavior. > > > > > > [Dhruv]: Yes that would be good with Eve suggestion and removing =E2=80= =98in the > document=E2=80=99/=E2=80=99of this draft=E2=80=99. > > > > > > * =E2=80=9CTransport networks have a variety of mechanisms to: > > - Facilitate separation of data plane and control plane, > > - Allow for distributed or centralized signaling for path > setup and protection, and > > - Provide traffic engineering mechanism via centralized pat= h > computation.=E2=80=9D > > > > Term =E2=80=98centralized signaling=E2=80=99 is confusing to me, do you m= ean, the use of > NMS? > > > > YOUNG>> Yes. We can reword the second point: =E2=80=9CAllow for distribut= ed > signaling or an NMS-based centralized signaling for set up=E2=80=A6.=E2= =80=9D > > > > [Dhruv]: That works! > > *----------------------------* > > > > * =E2=80=9CThe architecture work will lead to requirements for informatio= n models > and protocol extensions between the virtual network controller and the > physical network domain controllers and between the virtual network > controller and multi-tenant customer controllers.=E2=80=9D > > > > It would be nice to add =E2=80=9Cmulti-domain coordinator=E2=80=9D with = =E2=80=9Cvirtual network > controller=E2=80=9D to explicitly link them together. Also multi-tenant c= ustomer > controllers doesn=E2=80=99t convey the intention to have different custom= er > controllers for each tenant, how about=E2=80=A6 > > > > =E2=80=9CThe architecture work will lead to requirements for information = models > and protocol extensions between the virtual network controller (embedded = in > a multi-domain coordinator) and the physical network domain controllers a= nd > between the virtual network controller and multiple tenant customer > controllers.=E2=80=9D > > > > YOUNG>> This sounds good to me. Thanks. > > > > * =E2=80=9CThe working group will determine if new protocol extensions ar= e > necessary. If the working group determines they are necessary, then it wi= ll > develop the new protocols within the working group where necessary, while > interacting with other working groups to enhance existing protocols where > possible.=E2=80=9D > > > > Suggest to re-word this as it=E2=80=99s not clear =E2=80=93 is it about e= xtension to > existing protocols or new protocol and where that work might be taken up. > Also Protocol extensions is mentioned as a work item after re-chartering. > > > > YOUNG>> New protocol extensions mean a brand new protocol (say, =E2=80=9C= ACTN=E2=80=9D > protocol per se) that cannot be extended from existing protocols. But the= re > may be some areas where we need to expand from existing protocols. In suc= h > case, we need to interact with the corresponding WGs. Perhaps an analogy > would be that CCAMP WG is chartered to work on OPSF-TE for specific > technologies while OSPF WG needs to be informed of the protocol changes. > > > > [Dhruv]: How about we reword this to =E2=80=93 =E2=80=9CThe working group= will determine > if new protocol or extensions to existing protocols are necessary. If the > working group determines they are necessary, then it will develop new > protocols within the working group, on the other hand any extensions to > existing protocols would be done with interactions with other working > groups where possible.=E2=80=9D > > > > * You may want to do charter text formatting in RFC text format taking > care of word-wraps and indentation > > YOUNG>> Not sure what you meant here. Please clarify it for me. > > [Dhruv]: Refer attachment, this format would help when we upload it to th= e > data tracker and charter diff tool can help track it better. > > This version has all the changes suggested by me and Eve. > > Regards, > > Dhruv > > Hope you find them useful in making the charter text crisp. > > > > YOUNG>> Definitely. Thanks a lot for your review and great comments. > > > > Dhruv > > > > > > *From:* ACTN [mailto:actn-bounces@ietf.org ] *On > Behalf Of *Leeyoung > *Sent:* 10 September 2014 04:53 > *To:* Leeyoung; actn@ietf.org > *Subject:* [Actn] ACTN charter v1.0 > > > > Sorry, I forgot the Subject of this email. Here=E2=80=99s a retransmissio= n with > the subject. > > > > *From:* Leeyoung > *Sent:* Tuesday, September 09, 2014 3:47 PM > *To:* actn@ietf.org > *Subject:* > > > > Hi, > > > > I hope your summer break was a good one. > > > > We=E2=80=99d like to give you some updates and plans on the ACTN work. We= are > going to request a formal BoF in Honolulu IETF meeting. In doing so, we > need a charter draft as part of the due diligence. Here=E2=80=99s an init= ial > charter draft developed by the small set of proponents of the work based = on > the discussions and use-cases and other published documents. We hope thi= s > captures a workable ACTN scope. This version 1.0 draft charter is also > posted in the wiki: > https://sites.google.com/site/actnbof/home/charter-propor > > > > Your review and comment will be greatly appreciated to come up with a goo= d > charter developed by the community of interest. > > > > Best regards, > > Young (on behalf of the proponents) > > > > -------------------------------draft charter 1.0 > -------------------------------------------------------------------------= --------------------------- > > > > Transport networks have a variety of mechanisms to: > > - Facilitate separation of data plane and control plane, > > - Allow for distributed or centralized signaling for path setup > and protection, and > > - Provide traffic engineering mechanism via centralized path > computation. > > > > These represent key technologies for enabling flexible and dynamic > networking, and efficient control and recovery of resources. Although > these technologies provide significant benefits within a single domain > control boundary, they do not meet the growing need for transport network > virtualization in multi-domain transport networks. More and more network > operators are building and operating on multi-domain transport networks. > These domains (collections of links and nodes) may be each of a different > technology, administrative zones, or vendor-specific islands. Establishme= nt > of end-to-end connections spanning multiple domains is a perpetual proble= m > for operators because of both operational concerns (control plane and > management plane) and interoperability issues (control plane and data > plane). Due to these issues, new services that require connections that > traverse multiple domains need significant planning and often manual > operations to interface different vendor equipment and technology. > > > > The aim of Abstraction and Control of Transport Networks (ACTN) is to > facilitate a centralized virtual network operation: the creation of a > virtualized environment allowing operators to view and control > multi-subnet, multi-technology, multi-vendor domain networks. Abstraction > of transport networks also allows operators to consolidate their network > services into multi-tenant virtual transport networks. This will enable > rapid service deployment of new dynamic and elastic services, and will > improve overall network operations and scaling of existing services. > Discussion with operators has also highlighted a need for virtual network > operation based on the abstraction of underlying technology and vendor > domains. > > > > Multi-domain network coordination function in ACTN is built on a control > hierarchy where a multi-domain coordinator interacts with each domain > controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for > abstracting network resource information to provide virtual network contr= ol > functions. This virtual network control functions are embedded in a > multi-domain network coordinator to support various > services/clients/applications to create and manage their own virtual > networks that share the common transport network resources. > > > > The ACTN working group will work to develop a high-level architecture for > transport network abstraction and control that facilitates seamless > vertical service coordination across multi-tenant customers (primarily > internal service organizations with respect to a network operator), the > virtual network control and the physical network domain controls as well = as > a horizontal E2E service coordination across multi-domain networks. It wi= ll > identify key building components and the corresponding interfaces among > these components. The architecture work will lead to requirements for > information models and protocol extensions between the virtual network > controller and the physical network domain controllers and between the vi= rtual > network controller and multi-tenant customer controllers. Well-defined > use cases from operators perspective with clearly stated need for transpo= rt > network virtualization are critical in scoping the work and thus to achie= ve > the deliverables of the working group. > > > > The working group will work on the following items: > > - High-level architecture that describes the basic building blocks > to enable transport network virtualization to support use cases. > > - Operator-driven use cases to address the following initial items: > > o Virtual network control and operation for core transport Packet > Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON) > > o Virtual network control and operation for mobile backhaul > multi-technology transport (e.g., MPLS-TP and MPLS/OTN) > > o Data Center Operator=E2=80=99s interconnection with optical transpor= t > network infrastructure providers to support dynamic virtual circuit > services. > > o Multi-tenant support to allow virtual network information query, > virtual network negotiation, creation/deletion and modification. > > o Synchronization of network resources view across physical domain > controls and virtual network control. > > o Dynamic service control and monitoring across all entities. > > Initial work within the working group will be limited to a single operato= r > administrative domain with an exception for the Data Center operation use > case. > > - Evaluation of Information model/data model to support the use > cases. > > - Requirements to support APIs/protocols, encoding languages, and > data models > > - Gap analysis of existing IETF and other protocols, encoding > languages and data models to fulfill the requirements. > > - Protocol extensions (if necessary after re-chartering). > > > > The working group will determine if new protocol extensions are necessary= . > If the working group determines they are necessary, then it will develop > the new protocols within the working group where necessary, while > interacting with other working groups to enhance existing protocols where > possible. > > > > > > > > _______________________________________________ > ACTN mailing list > ACTN@ietf.org > https://www.ietf.org/mailman/listinfo/actn > > --=20 --=20 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D | Y. Richard Yang | | Professor of Computer Science | | http://www.cs.yale.edu/~yry/ | =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --bcaec51d218cd7be690502e60e68 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi Young, all,

This sure is an active l= ist and it is a bit hard to jump to the discussion! I read charter v1.1 and= the discussions followed on the changes. Here are some early comments:

- The current version appears to trying to do both (1= ) imposing an architecture and (2) leaving architecture to the architecture= document. For example, I see multiple types of controllers (physical contr= oller for a domain, coordinator for physical controllers, tenant controller= for a tenant, ...). I also already see how they may interact (e.g., the hi= erarchy paragraph). Some email discussion start to touch on this issue. My = preference is that it is better to leave the architecture as much as possib= le to the architecture document, to avoid confusion, because there are so m= any possibilities (e.g., a controller might be represented by two functions= , one for abstraction, one for control), unless the mailing list can reach = some agreement soon.

- In the document, the word &= quot;abstraction" is a keyword, and it is different from "control= ", which is the other keyword. I am fine with keeping the meaning of a= bstraction somehow vague, but it may become confusing when there is too muc= h overloading. For example, according to this sentence, "the creation = of a virtualized environment allowing operators to view and control multi-s= ubnet, multi-technology, multi-vendor domain networks", abstraction is= similar to "view". Then, the following sentence "Abstractio= n of transport networks also allows operators to consolidate their network = services into multi-tenant virtual transport networks." appears to ass= ign abstraction a much stronger meaning. I would suggest revision to keep t= he meaning of the keywords simple.

- The charter u= ses the word "virtualized" quite a few times. I found that they a= ppear to have different meanings. For example, in this sentence, "Well= -defined use cases from operators perspective with=C2=A0
clearly stated= need for transport network virtualization", does "virtualization= " mean abstraction? For this sentence, "a centralized virtual net= work operation", I cannot fully understand the meaning of the word &qu= ot;virtual". For this sentence, "Multi-tenant support to allow vi= rtual network information query", it appears that virtual means an ove= rlay network, right?

- Increasingly, "abstrac= tion" in networking appears to mean (declarative) information model/da= ta models, and this is what I read from this document as well. But abstract= ion can mean a lot more. A good starting point is the wiki doc (http://en.wiki= pedia.org/wiki/Abstraction_(computer_science)). I hope that the charter= can be stated slightly more broadly (e.g., by stating that the WG will doc= ument the challenges of abstracting complex behaviors of transport networks= , and identify potential related techniques).

Rich= ard



On Fri, Sep 12, 2014 at 11:07 AM, Leeyoun= g <leeyoung@huawei.com> wrote:

Hi Daniele,<= /u>

=C2=A0

Thanks for providing y= our good comments here. Some of your comment (1) is for charter discussion = while the others (2 & 3) are architecture discussion. As a few folks ar= e already working on the architecture document, we may start a new email thread on architecture discussion while developin= g the draft.

=C2=A0

Please see inline for = my response.

=C2=A0

Regards,=

Young

=C2=A0

From: Daniele = Ceccarelli [mailto:daniele.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@ietf.org
Subject: RE: ACTN charter v1.0

=C2=A0

Dhruv, Young,

=C2=A0

Excellent progresses!<= u>

Let me just add some n= otes/questions.

I=E2=80=99m collecting= them here and not inline as the reading of the whole thread is becoming pr= etty complex.

=C2=A0

1.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 On centralized si= gnaling: We need to clearly state what centralized signaling means. NMS bas= ed is one of the possibilities but it=E2=80=99s not limited to NMS. A netwo= rk implementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here I=E2=80=99m not s= ure whether we can speak about centralized signaling in both cases or not. = In the case of NMS we use the management plane to dynamically provision con= nectivity (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plane or is somet= hing else? Please note that I speak about OF as it=E2=80=99s the only examp= le that comes to my mind but any other possibility can/must be considered.<= u>

=C2=A0

YOUNG>> T= he intention here was giving some overview of the tools that current transp= ort networks have. Of course thing are quickly changing with other initiati= ves like OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps good compromis= e would be putting NMS based as an example. How about restating like:

=C2=A0

Allow for distributed signaling or central= ized signaling (e.g., an NMS-based, etc.) for set up=E2=80=A6.=E2=80=9D =C2=A0=C2=A0

<= span class=3D"">

=C2=A0

=C2=A0

2.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 On multidomain is= sues: One question here: How do we want to manage multi-domain? I see two w= ays:

a.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 A coordinator of = virtual network controllers =E2=80=93 i.e. 1:1 relationship between virtual= network controller and physical network controller plus a coordinator of v= irtual network controllers on top

b.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 A coordinator of = physical network controllers =E2=80=93 i.e. a coordinator of physical netwo= rk controllers (1:N relationship between coordinator and PNCs) with a virtu= al network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we shoul= d consider both architectures, maybe pick one.

=C2=A0

YOUNG>> T= hese options seem to be detailed architecture that the upcoming architectur= e document should address in detail. My personal opinion is that both archi= tectures need to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial = baseline architecture.

=C2=A0

3.=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Again on multiodo= main: maybe we could improve the architecture draft saying what is centrali= zed and what is distributed. E.g. VPN prefixes exchange could be distribute= d (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordi= nator asks controller A to provision a path with domain A and asks controll= er B to provide a path within B so to have an end to end path crossing doma= ins A and B)=E2=80=A6H-PCE like.

=C2=A0

YOUNG>> G= ood point. I agree that the architecture draft should discuss these dichoto= my of control regimes (e.g., centralized vs. distributed). One question I h= ave: are you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

=C2=A0

BR
Daniele

=C2=A0

From: ACTN [ma= ilto:actn-bounce= s@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=C3=AC 12 settembre 2014 04:33
To: Leeyoung; act= n@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

=C2=A0

Hi Young,

=C2=A0

Please see inline..

=C2=A0

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.org
Subject: RE: ACTN charter v1.0

=C2=A0

Hi Young,

=C2=A0

Please find some comments on the proposed = charter.

=C2=A0

* Do we need some text in charter also to = specify what we consider as Transport networks?

=C2=A0

YOUNG>> That may clarify the scope. = Do you have any suggestion? =C2=A0One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-le= eking-actn-problem-statement/) is as follows. Would this be good enough or need more work? =

=C2=A0

Transport networks are= defined as network infrastructure that

=C2=A0=C2=A0 provides = connectivity and bandwidth for customer services. They

=C2=A0=C2=A0 are chara= cterized by their ability to support server layer

=C2=A0=C2=A0=C2=A0prov= isioning and traffic engineering for client layer services,

=C2=A0=C2=A0=C2=A0such= that resource guarantees may be provided to their customers.=

=C2=A0=C2=A0 Transport= networks in this document refer to a set of different

=C2=A0=C2=A0 type of c= onnection-oriented networks, which include Connection-

=C2=A0=C2=A0 Oriented = Circuit Switched (CO-CS) networks and Connection-

=C2=A0=C2=A0 Oriented = Packet Switched (CO-PS) networks. This implies that at

=C2=A0=C2=A0=C2=A0leas= t the following transport networks are in scope of the

=C2=A0=C2=A0 discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

=C2=A0=C2=A0=C2=A0Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

=C2=A0=C2=A0=C2=A0Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

=C2=A0=C2=A0 network t= echnologies with connection-oriented behavior.

=C2= =A0

=C2= =A0

[Dhruv]: Yes= that would be good with Eve suggestion and removing =E2=80=98in the docume= nt=E2=80=99/=E2=80=99of this draft=E2=80=99.

=C2=A0

=C2=A0

* =E2=80=9CTransport networks have a varie= ty of mechanisms to:

-=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 Facilitate separation of data= plane and control plane,

-=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 Allow for distributed or cent= ralized signaling=C2=A0 for path setup and protection, and

-=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 Provide traffic engineering m= echanism via centralized path computation.=E2=80=9D

=C2=A0

Term =E2=80=98centralized signaling=E2=80= =99 is confusing to me, do you mean, the use of NMS?

=C2=A0

YOUNG>> Yes. We can reword the secon= d point: =E2=80=9CAllow for distributed signaling or an NMS-based centraliz= ed signaling for set up=E2=80=A6.=E2=80=9D

=C2=A0

[Dhruv]: That works!

----------------= ------------

=C2=A0

* =E2=80=9CThe architecture work will lead= to requirements for information models and protocol extensions between the= virtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.=E2=80=9D

=C2=A0

It would be nice to add =E2=80=9Cmulti-dom= ain coordinator=E2=80=9D with =E2=80=9Cvirtual network controller=E2=80=9D = to explicitly link them together. Also multi-tenant customer controllers do= esn=E2=80=99t convey the intention to have different customer controllers for each tenant, how = about=E2=80=A6

=C2=A0

=E2=80=9CThe architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.=E2=80=9D

=C2=A0

YOUNG>> This sounds good to me. Than= ks.

=C2=A0

* =E2=80=9CThe working group will determin= e if new protocol extensions are necessary. If the working group determines= they are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.=E2=80=9D

=C2=A0

Suggest to re-word this as it=E2=80=99s no= t clear =E2=80=93 is it about extension to existing protocols or new protoc= ol and where that work might be taken up. Also Protocol extensions is menti= oned as a work item after re-chartering. =C2=A0

=C2=A0

YOUNG>> New protocol extensions mean= a brand new protocol (say, =E2=80=9CACTN=E2=80=9D protocol per se) that ca= nnot be extended from existing protocols. But there may be some areas where= we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

=C2=A0

[Dhruv]: How about we reword this to =E2= =80=93 =E2=80=9CThe working group will determine if new protocol or extensi= ons to existing protocols are necessary. If the working group determines th= ey are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done=C2= =A0 with interactions with other working groups where possible.=E2=80=9D=

=C2=A0

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better. =C2=A0

This versio= n has all the changes suggested by me and Eve.

Regards,=

Dhruv

Hope you find them useful in making the ch= arter text crisp.

=C2=A0

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

=C2=A0

Dhruv

=C2=A0

=C2=A0

From: ACTN [mailto:actn-bounce= s@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; act= n@ietf.org
Subject: [Actn] ACTN charter v1.0

=C2=A0

Sorry, I forgot the Su= bject of this email. Here=E2=80=99s a retransmission with the subject.

=C2=A0

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org=
Subject:

=C2=A0

Hi,

=C2=A0

I hope your summer break was a good one. <= /u>

=C2=A0

We=E2=80=99d like to give you some updates and plans= on the ACTN work. We are going to request a formal BoF in Honolulu IETF me= eting. In doing so, we need a charter draft as part of the due diligence. H= ere=E2=80=99s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents. =C2=A0We hope this captures a workable = ACTN scope. =C2=A0This version 1.0 draft charter is also posted in the wiki= : https://sites.google.com/site/actnbof/home/charter-propor

=C2=A0

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. =C2= =A0

=C2=A0

Best regards,

Young (on behalf of the proponents)

=C2=A0

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

=C2=A0

Transport networks have a variety of mechanisms to:<= /u>

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Facilitate separati= on of data plane and control plane,

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Allow for distribut= ed or centralized signaling=C2=A0 for path setup and protection, and

-=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 Provide traffic eng= ineering mechanism via centralized path computation.

=C2=A0

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).=C2=A0 Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

=C2=A0

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.

=C2=A0

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

=C2=A0

The A= CTN working group will work to develop a high-level architecture for transp= ort network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.=C2=A0 The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

=C2=A0

The working group will work on the following = items:

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Operator-driven use cases to address the following initial items:

o=C2=A0=C2=A0=C2=A0 Virtual network control and operation for core transport Packet Opt= ical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o=C2=A0=C2=A0=C2=A0 Virtual network control and operation for mobile backhaul multi-tec= hnology transport (e.g., MPLS-TP and MPLS/OTN)

o=C2=A0=C2=A0=C2=A0 Data Center Operator=E2=80=99s interconnection with optical transpo= rt network infrastructure providers to support dynamic virtual circuit services.

o=C2=A0=C2=A0=C2=A0 Multi-tenant support to allow virtual network information query, vi= rtual network negotiation, creation/deletion and modification.

o=C2=A0=C2=A0=C2=A0 Synchronization of network resources view across physical domain co= ntrols and virtual network control.

o=C2=A0=C2=A0=C2=A0 Dynamic= service control and monitoring across all entities.

Initial work within the working group will be = limited to a single operator administrative domain with an exception for the Data Center operation use case.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Evaluation of Information model/data model to support the use cases= .

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Requirements to support APIs/protocols, encoding languages, and dat= a models

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements.

-=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 Protocol extensions (if necessary after re-chartering).

=C2=A0

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

=C2=A0

=C2=A0

= =C2=A0


_______________________________________________
ACTN mailing list
ACTN@ietf.org
ht= tps://www.ietf.org/mailman/listinfo/actn




--
--=C2=A0
=C2=A0=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D
| Y. Richa= rd Yang <yry@cs.yal= e.edu> =C2=A0 |
| Professor of Computer Science =C2=A0 =C2=A0 =C2=A0 |
= | http://www.cs.yale.edu/~yry/ =C2=A0 =C2=A0 =C2= =A0 =C2=A0|
=C2=A0= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--bcaec51d218cd7be690502e60e68-- From nobody Sun Sep 14 22:22:52 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4C8681A0653 for ; Sun, 14 Sep 2014 22:22:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.852 X-Spam-Level: X-Spam-Status: No, score=-5.852 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DoCocY2kJve0 for ; Sun, 14 Sep 2014 22:22:47 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 67D1A1A064E for ; Sun, 14 Sep 2014 22:22:46 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml404-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMO05172; Mon, 15 Sep 2014 05:22:45 +0000 (GMT) Received: from SZXEML423-HUB.china.huawei.com (10.82.67.162) by lhreml404-hub.china.huawei.com (10.201.5.218) with Microsoft SMTP Server (TLS) id 14.3.158.1; Mon, 15 Sep 2014 06:22:34 +0100 Received: from szxeml556-mbs.china.huawei.com ([169.254.4.112]) by szxeml423-hub.china.huawei.com ([10.82.67.162]) with mapi id 14.03.0158.001; Mon, 15 Sep 2014 13:22:28 +0800 From: Dhruv Dhody To: Daniele Ceccarelli , "actn@ietf.org" Thread-Topic: ACTN architecture Thread-Index: Ac/Om8qi9g/D/THATIaDRn5wbOi7GACBkWJQ Date: Mon, 15 Sep 2014 05:22:27 +0000 Message-ID: <23CE718903A838468A8B325B80962F9B865F029E@szxeml556-mbs.china.huawei.com> References: <4A1562797D64E44993C5CBF38CF1BE481276015F@ESESSMB301.ericsson.se> In-Reply-To: <4A1562797D64E44993C5CBF38CF1BE481276015F@ESESSMB301.ericsson.se> Accept-Language: en-GB, zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.18.146.248] Content-Type: multipart/alternative; boundary="_000_23CE718903A838468A8B325B80962F9B865F029Eszxeml556mbschi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/gp8hbqAtifga8iEA8LUjGZOxC6c Subject: Re: [Actn] ACTN architecture X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Sep 2014 05:22:50 -0000 --_000_23CE718903A838468A8B325B80962F9B865F029Eszxeml556mbschi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Daniele, Young, See inline.. From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Daniele Ceccarelli Sent: 12 September 2014 23:21 To: actn@ietf.org Subject: [Actn] ACTN architecture Reposting my architecture considerations and Young's replies in a dedicated= thread. 1. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. [[DanCe]] Agree. Let's keep track of both of them. [Dhruv]: In the current architecture document we do not use the term 'coord= inator'; In the charter it says - "Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN = controller) for abstracting network resource information to provide virtual= network control functions. This virtual network control functions are embe= dded in a multi-domain network coordinator to support various services/clie= nts/applications to create and manage their own virtual networks that share= the common transport network resources." To me this reads as the coordinator and virtual network control function ar= e embedded together. If we feel that multiple options are okay and need to = be studied, we should relax the text in the charter. 2. Again on multidomain: maybe we could improve the architecture draft= saying what is centralized and what is distributed. E.g. VPN prefixes exch= ange could be distributed (controllers speaking MP-BGP with each other) whi= le provisioning could be hierarchical (i.e. the coordinator asks controller= A to provision a path with domain A and asks controller B to provide a pat= h within B so to have an end to end path crossing domains A and B)...H-PCE = like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? [[DanCe]] The scenarios that come to my mind are more "horizontal". I would= say the either the nodes speak MP-BGP with each other across the domains = (in case of distributed protocols) or the controllers gets the information = from its own domain and then speak MP-BGP with the other controllers "on be= half of their domains" [Dhruv]: I feel this is highly dependent on the physical network controller= s, if its a PCE it has its own way to do inter-PCE communication and if the= controller runs BGP it may directly interact with other controller. IMHO = the ACTN architecture should not impose any restriction on this interaction= , nor make it a pre-requisite as in some case the two controller may not be= able to interact with each other directly (different technology, vendor sp= ecific NMS etc). BR Daniele --_000_23CE718903A838468A8B325B80962F9B865F029Eszxeml556mbschi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Daniele, Young,

 

See inline..

 

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
Sent: 12 September 2014 23:21
To: actn@ietf.org
Subject: [Actn] ACTN architecture

 

Reposting my architect= ure considerations and Young’s replies in a dedicated thread.

 

 

1.&= nbsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.<= o:p>

 

YOUNG>> These option= s seem to be detailed architecture that the upcoming architecture document = should address in detail. My personal opinion is that both architectures ne= ed to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial baseli= ne architecture.

[[DanCe]] Agree. Let&#= 8217;s keep track of both of them.

[Dhruv]: In the= current architecture document we do not use the term ‘coordinator= 217;;

In the charter = it says – “Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.”  

To me this read= s as the coordinator and virtual network control function are embedded toge= ther. If we feel that multiple options are okay and need to be studied, we should relax the text in the charter.  

 

2.&= nbsp;     Again on multi= domain: maybe we could improve the architecture draft saying what is centra= lized and what is distributed. E.g. VPN prefixes exchange could be distribu= ted (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordinator= asks controller A to provision a path with domain A and asks controller B = to provide a path within B so to have an end to end path crossing domains A= and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

[[DanCe]] The scenario= s that come to my mind are more “horizontal”. I would say the e= ither the nodes speak MP-BGP with each other across the domains  (in c= ase of distributed protocols) or the controllers gets the information from its own domain and then speak MP-BGP with the other c= ontrollers “on behalf of their domains”

 

[Dhruv]: I feel= this is highly dependent on the physical network controllers, if its a PCE= it has its own way to do inter-PCE communication and if the controller runs BGP  it may directly interact with other controller. = IMHO the ACTN architecture should not impose any restriction on this intera= ction, nor make it a pre-requisite as in some case the two controller may n= ot be able to interact with each other directly (different technology, vendor specific NMS etc).

 

BR
Daniele

 

--_000_23CE718903A838468A8B325B80962F9B865F029Eszxeml556mbschi_-- From nobody Mon Sep 15 10:05:55 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 69BB01A89B0 for ; Mon, 15 Sep 2014 10:05:52 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.551 X-Spam-Level: X-Spam-Status: No, score=-3.551 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-1.652] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id HWuM1KVRG0kK for ; Mon, 15 Sep 2014 10:05:38 -0700 (PDT) Received: from smtp-fr.alcatel-lucent.com (fr-hpgre-esg-01.alcatel-lucent.com [135.245.210.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B0AE31A89C7 for ; Mon, 15 Sep 2014 09:32:05 -0700 (PDT) Received: from fr711usmtp1.zeu.alcatel-lucent.com (unknown [135.239.2.122]) by Websense Email Security Gateway with ESMTPS id 7E545DB9123A4; Mon, 15 Sep 2014 16:32:00 +0000 (GMT) Received: from FR711WXCHHUB01.zeu.alcatel-lucent.com (fr711wxchhub01.zeu.alcatel-lucent.com [135.239.2.111]) by fr711usmtp1.zeu.alcatel-lucent.com (GMO) with ESMTP id s8FGVqsZ018640 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Mon, 15 Sep 2014 18:32:02 +0200 Received: from FR711WXCHMBA05.zeu.alcatel-lucent.com ([169.254.1.23]) by FR711WXCHHUB01.zeu.alcatel-lucent.com ([135.239.2.111]) with mapi id 14.03.0195.001; Mon, 15 Sep 2014 18:31:45 +0200 From: "BELOTTI, SERGIO (SERGIO)" To: Aihua Guo , Leeyoung Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAAl1QIAARW8QgAATiLCABG3V0A== Date: Mon, 15 Sep 2014 16:31:45 +0000 Message-ID: References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <7AEB3D6833318045B4AE71C2C87E8E1729C2F30D@dfweml706-chm> In-Reply-To: Accept-Language: it-IT, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [135.239.27.40] Content-Type: multipart/alternative; boundary="_000_B9FEE68CE3A78C41A2B3C67549A96F486D51AF4EFR711WXCHMBA05z_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/V6adbVWfLcAbIU0fcKmPg2UQXjI Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Sep 2014 17:05:52 -0000 --_000_B9FEE68CE3A78C41A2B3C67549A96F486D51AF4EFR711WXCHMBA05z_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Aihua, could you kindly clarify for my knowledge what "PCEP extensions carrying se= rvice related information" you're referring to? If you consider RFC 4655, I do not see any architecture hint that exclude d= istributed signaling as basic method to path setup in a PCE context. On the other hand , the newly draft considering the possibility to use "oth= er" path setup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is introd= ucing a specifc TLV that you need to add if you want to use another method = in your architecture. In fact , the default value proposed for path Setup T= ype field is 0 , implicitly considering RSVP_TE as default setup method. I have difficult to understand what you mean with "service provisioning req= uests may be issued from a centralized controller to all network elements v= ertically and in parallel.". What you mean with vertical and in parallel? On the other hand I do not see when an NMS does not carry service info, whe= ther for service info you consider the path setup info. So I'm still uncomfortable with the term "centralized signaling" in this c= ontext. Thanks Sergio From: Aihua Guo [mailto:AGuo@advaoptical.com] Sent: sabato 13 settembre 2014 00:26 To: Leeyoung; BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio, Regarding your comment, "There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." " Today with e.g. PCEP extensions carrying service related information, servi= ce provisioning requests may be issued from a centralized controller to all= network elements vertically and in parallel. This is IMHO one form of cent= ralized signaling. Service provisioning can be made through NMS, and NMS may or may not includ= e service related information in the management protocols. Hence I still se= e a difference between NMS based and centralized signaling. Would it be wor= th to reflect the difference in the wording with something like this: ? "Allow for distributed signaling or centralized model (e.g.an NMS-based or = centralized signaling) for set up...." Thanks. Aihua From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 3:23 PM To: BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Sergio, I am OK with your suggested wording. Thanks. Young From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com] Sent: Friday, September 12, 2014 10:34 AM To: Leeyoung Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Daniele Please see in line . Thanks Sergio From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: venerd=EC 12 settembre 2014 17:08 To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized = signaling means. NMS based is one of the possibilities but it's not limited= to NMS. A network implementing e.g. Open Flow or any other similar protoco= l should be considered as well IMHO. Here I'm not sure whether we can speak= about centralized signaling in both cases or not. In the case of NMS we us= e the management plane to dynamically provision connectivity (whatever prot= ocol is used). In the case of e.g. Open Flow can we speak about management = plane or is something else? Please note that I speak about OF as it's the o= nly example that comes to my mind but any other possibility can/must be con= sidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." SB> I have still problems with this definition. In my view when you think a= bout to an NMS based path setup, I have a centralized station that is provi= ding command towards managed equipment functions that are virtualized in a = MIB , and these command provide the "resource reservation" phase (not only = but just to make the comparison with normal signaling protocol) using a "ve= rtical" management protocol . There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." 2. On multidomain issues: One question here: How do we want to manage m= ulti-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationship= between virtual network controller and physical network controller plus a = coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator o= f physical network controllers (1:N relationship between coordinator and PN= Cs) with a virtual network controller on top? (1:1 relationship between PNC= coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draft= saying what is centralized and what is distributed. E.g. VPN prefixes exch= ange could be distributed (controllers speaking MP-BGP with each other) whi= le provisioning could be hierarchical (i.e. the coordinator asks controller= A to provision a path with domain A and asks controller B to provide a pat= h within B so to have an end to end path crossing domains A and B)...H-PCE = like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and= protection, and - Provide traffic engineering mechanism via centralized path computa= tion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks t= o enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use case= s. - Requirements to support APIs/protocols, encoding languages, and da= ta models - Gap analysis of existing IETF and other protocols, encoding langua= ges and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_B9FEE68CE3A78C41A2B3C67549A96F486D51AF4EFR711WXCHMBA05z_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Aihua,

 

could y= ou kindly clarify for my knowledge what “PCEP extensions carrying service related informatio= n” you’re referring to?

If you = consider RFC 4655, I do not see any architecture hint that exclude distribu= ted signaling as basic method to path setup in a PCE context.

On the = other hand , the newly draft considering the possibility to use “othe= r” path setup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is i= ntroducing a specifc TLV that you need to add if you want to use another method in your architecture. In fact , the default val= ue proposed for path Setup Type field is 0 , implicitly considering RSVP_TE= as default  setup method.

&n= bsp;

I have = difficult to understand what you mean with “service provisioning requ= ests may be issued from a centralized controller to all network elements ve= rtically and in parallel.”. What you mean with vertical and in parallel?

On the = other hand I do not see when an NMS does not carry service info, whether fo= r service info you consider the path setup info.

So I= 217;m still uncomfortable with the term “centralized signaling”=  in this context.

&n= bsp;

Thanks<= o:p>

Sergio<= o:p>

&n= bsp;

&n= bsp;

From: Aihua Gu= o [mailto:AGuo@advaoptical.com]
Sent: sabato 13 settembre 2014 00:26
To: Leeyoung; BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0

 

Hi Serg= io,

&n= bsp;

Regardi= ng your comment,

“= There is no signaling in my= view .

Another cas= e is PCE: PCE is providing path computation phase , and can exploit on a di= stributed control plane to make a signaling of the setup calculated. But ag= ain , it is not a centralized signaling , signaling is distributed , it is the routing, if anything,  that is= centralized in my view.

 =

So I would = suggest to delete the term signaling associated to centralized and change t= he sentence into:

“Allow for distributed signaling or centralized = model (e.g.an NMS-based) for set up….”

”=

&n= bsp;

Today w= ith e.g. PCEP extensions carrying service related information, service prov= isioning requests may be issued from a centralized controller to all networ= k elements vertically and in parallel. This is IMHO one form of centralized signaling.

&n= bsp;

Service= provisioning can be made through NMS, and NMS may or may not include servi= ce related information in the management protocols. Hence I still see a dif= ference between NMS based and centralized signaling. Would it be worth to reflect the difference in the wording with= something like this: ?

&n= bsp;

“Allow for distributed signaling or centralized = model (e.g.an NMS-based or centralized signaling) for set up….”=

&n= bsp;

Thanks.=

Aihua

&n= bsp;

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 3:23 PM
To: BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Serg= io,

&n= bsp;

I am OK= with your suggested wording. Thanks.

&n= bsp;

Young

&n= bsp;

From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com]
Sent: Friday, September 12, 2014 10:34 AM
To: Leeyoung
Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Youn= g, Daniele

&n= bsp;

Please = see in line .

&n= bsp;

Thanks =

Sergio<= o:p>

&n= bsp;

 

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 12 settembre 2014 17:08
To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dani= ele,

&n= bsp;

Thanks = for providing your good comments here. Some of your comment (1) is for char= ter discussion while the others (2 & 3) are architecture discussion. As= a few folks are already working on the architecture document, we may start a new email thread on architecture discussion while= developing the draft.

&n= bsp;

Please = see inline for my response.

&n= bsp;

Regards= ,

Young

&n= bsp;

From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@iet= f.org
Subject: RE: ACTN charter v1.0

 

Dhruv, = Young,

&n= bsp;

Excelle= nt progresses!

Let me = just add some notes/questions.

I’= ;m collecting them here and not inline as the reading of the whole thread i= s becoming pretty complex.

&n= bsp;

= 1.     On centralized signaling: We need to clearly state what centralized signal= ing means. NMS based is one of the possibilities but it’s not limited= to NMS. A network implementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here= I’m not sure whether we can speak about centralized signaling in bot= h cases or not. In the case of NMS we use the management plane to dynamical= ly provision connectivity (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plan= e or is something else? Please note that I speak about OF as it’s the= only example that comes to my mind but any other possibility can/must be c= onsidered.

&n= bsp;

YOUNG&g= t;> The intention here was giving some overview of the tools that curren= t transport networks have. Of course thing are quickly changing with other = initiatives like OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps = good compromise would be putting NMS based as an example. How about restati= ng like:

&n= bsp;

Allow for distributed signa= ling or centralized signaling (e.g., an NMS-based, etc.) for set up….= ”   =

&n= bsp;

SB> I ha= ve still problems with this definition. In my view when you think about to = an NMS based path setup, I have a centralized station that is providing com= mand towards managed equipment functions that are virtualized in a MIB , and these command provide the “resou= rce reservation” phase (not only but just to make the comparison with= normal signaling protocol) using a “vertical” management proto= col .

There is no= signaling in my view .

Another cas= e is PCE: PCE is providing path computation phase , and can exploit on a di= stributed control plane to make a signaling of the setup calculated. But ag= ain , it is not a centralized signaling , signaling is distributed , it is the routing, if anything,  that is= centralized in my view.

 =

So I would = suggest to delete the term signaling associated to centralized and change t= he sentence into:

“Allow for distributed signaling or centralized = model (e.g.an NMS-based) for set up….”

&n= bsp;

&n= bsp;

= 2.     On multidomain issues: One question here: How do we want to manage multi-d= omain? I see two ways:

a.     A coordinator of virtual network controllers – i.e. 1:1 relationship= between virtual network controller and physical network controller plus a = coordinator of virtual network controllers on top

b.     A coordinator of physical network controllers – i.e. a coordinator o= f physical network controllers (1:N relationship between coordinator and PN= Cs) with a virtual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, m= aybe pick one.

&n= bsp;

YOUNG&g= t;> These options seem to be detailed architecture that the upcoming arc= hitecture document should address in detail. My personal opinion is that bo= th architectures need to be considered as a starting point. There may be other variations. Then we may narrow the scop= e as an initial baseline architecture.

&n= bsp;

= 3.     Again on multiodomain: maybe we could improve the architecture draft sayin= g what is centralized and what is distributed. E.g. VPN prefixes exchange c= ould be distributed (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the= coordinator asks controller A to provision a path with domain A and asks c= ontroller B to provide a path within B so to have an end to end path crossi= ng domains A and B)…H-PCE like.

&n= bsp;

YOUNG&g= t;> Good point. I agree that the architecture draft should discuss these= dichotomy of control regimes (e.g., centralized vs. distributed). One ques= tion I have: are you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coor= dinator need to collect the VPN prefixes using the interface between the co= ordinator and each PNC (that speaks MP-BGP)? Then can this be viewed as a c= entralized component?

&n= bsp;

BR
Daniele

&n= bsp;

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

&n= bsp;

From: Dhruv Dhody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments o= n the proposed charter.

 

* Do we need some text in c= harter also to specify what we consider as Transport networks?

 

YOUNG>> That may clar= ify the scope. Do you have any suggestion?  One definition from the Pr= oblem Statement draft (https://datatracker.ietf.org/doc/draft-leeki= ng-actn-problem-statement/) is as follows. Would this be good enough or need more work?

 

T= ransport networks are defined as network infrastructure that

&= nbsp;  provides connectivity and bandwidth for customer services. They=

&= nbsp;  are characterized by their ability to support server layer

&= nbsp;  provisioning and traffic engineering for client layer serv= ices,

&= nbsp;  such that resource guarantees may be provided to their cus= tomers.

&= nbsp;  Transport networks in this document refer to a set of different=

&= nbsp;  type of connection-oriented networks, which include Connection-=

&= nbsp;  Oriented Circuit Switched (CO-CS) networks and Connection-=

&= nbsp;  Oriented Packet Switched (CO-PS) networks. This implies that at

&= nbsp;  least the following transport networks are in scope of the=

&= nbsp;  discussion of this draft: Layer 1 (L1) optical networks (e.g.,

&= nbsp;  Optical Transport Networks (OTN) and Wavelength Switched O= ptical

&= nbsp;  Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerg= ing

&= nbsp;  network technologies with connection-oriented behavior.

 

 

[Dhruv]: Yes that would be good with Eve suggestion and removing ‘= in the document’/’of this draft’.

 

 

* “Transport networks= have a variety of mechanisms to:

-    &n= bsp;          Facilitate separ= ation of data plane and control plane,

-    &n= bsp;          Allow for distri= buted or centralized signaling  for path setup and protection, and

-    &n= bsp;          Provide traffic = engineering mechanism via centralized path computation.”

 

Term ‘centralized sig= naling’ is confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can r= eword the second point: “Allow for distributed signaling or an NMS-ba= sed centralized signaling for set up….”

 

[Dhruv]: That works!

-= ---------------------------

 

* “The architecture w= ork will lead to requirements for information models and protocol extension= s between the virtual network controller and the physical network domain controllers and between the virtual network controller and multi-te= nant customer controllers.”

 

It would be nice to add = 220;multi-domain coordinator” with “virtual network controller&= #8221; to explicitly link them together. Also multi-tenant customer control= lers doesn’t convey the intention to have different customer controllers for each tenan= t, how about…

 

“The architecture wor= k will lead to requirements for information models and protocol extensions = between the virtual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the v= irtual network controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds g= ood to me. Thanks.

 

* “The working group = will determine if new protocol extensions are necessary. If the working gro= up determines they are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other wor= king groups to enhance existing protocols where possible.”=

 

Suggest to re-word this as = it’s not clear – is it about extension to existing protocols or= new protocol and where that work might be taken up. Also Protocol extensio= ns is mentioned as a work item after re-chartering.  <= /p>

 

YOUNG>> New protocol = extensions mean a brand new protocol (say, “ACTN” protocol per = se) that cannot be extended from existing protocols. But there may be some = areas where we need to expand from existing protocols. In such case, we need to = interact with the corresponding WGs. Perhaps an analogy would be that CCAMP= WG is chartered to work on OPSF-TE for specific technologies while OSPF WG= needs to be informed of the protocol changes.

 

[Dhruv]: How about we rewor= d this to – “The working group will determine if new protocol o= r extensions to existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within t= he working group, on the other hand any extensions to existing protocols wo= uld be done  with interactions with other working groups where possibl= e.”

 

* You may want to do charter text formatting in RFC text format taking = care of word-wraps and indentation

YOUNG>> Not sure what you meant here. Please clarify it for me.

[Dhruv]: Refer attachment, this format would help when we upload it to = the data tracker and charter diff tool can help track it better.  

This version has all the changes suggested by me and Eve.

Regards,

Dhruv

Hope you find them useful i= n making the charter text crisp.

 

YOUNG>> Definitely. T= hanks a lot for your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, = I forgot the Subject of this email. Here’s a retransmission with the = subject.

&n= bsp;

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a = good one.

 

We’d like to give you som= e updates and plans on the ACTN work. We are going to request a formal BoF = in Honolulu IETF meeting. In doing so, we need a charter draft as part of t= he due diligence. Here’s an initial charter draft developed by the small set of proponents of the work based on the di= scussions and use-cases and other published documents.  We hope this c= aptures a workable ACTN scope.  This version 1.0 draft charter is also= posted in the wiki: https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be= greatly appreciated to come up with a good charter developed by the commun= ity of interest.  

 

Best regards,=

Young (on behalf of the propone= nts)

 

-------------------------------= draft charter 1.0 ---------------------------------------------------------= -------------------------------------------

 

Transport networks have a variety of mec= hanisms to:

-F= acilitate separation of data plane and control plane,

-A= llow for distributed or centralized signaling  for path setup and prot= ection, and

-     &= nbsp;  P= rovide traffic engineering mechanism via centralized path computation.

 

These represent key technologies for ena= bling flexible and dynamic networking, and efficient control and recovery of resources. Although these tech= nologies provide significant benefits within a single domain control bounda= ry, they do not meet the growing need for transport network virtualization = in multi-domain transport networks. More and more network operators are building and operating on multi-domain= transport networks. These domains (collections of links and nodes) may be = each of a different technology, administrative zones, or vendor-specific is= lands. Establishment of end-to-end connections spanning multiple domains is a perpetual problem for operators= because of both operational concerns (control plane and management plane) = and interoperability issues (control plane and data plane).  Due to th= ese issues, new services that require connections that traverse multiple domains need significant planning and o= ften manual operations to interface different vendor equipment and technolo= gy.

 

The aim of Abstraction and Control of Transpo= rt Networks (ACTN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to= view and control multi-subnet, multi-technology, multi-vendor domain netwo= rks. Abstraction of transport networks also allows operators to consolidate= their network services into multi-tenant virtual transport networks. This will enable rapid service deployment of n= ew dynamic and elastic services, and will improve overall network operation= s and scaling of existing services. Discussion with operators has also high= lighted a need for virtual network operation based on the abstraction of underlying technology and vendor dom= ains.

 

Multi-domain network coordination function in= ACTN is built on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control pl= ane, SDN controller) for abstracting network resource information to provid= e virtual network control functions. This virtual network control functions= are embedded in a multi-domain network coordinator to support various services/clients/applications to cr= eate and manage their own virtual networks that share the common transport = network resources.

 

The ACTN working group will work to develo= p a high-level architecture for transport network abstraction and control that facilitates seamless vertical service coordination across= multi-tenant customers (primarily internal service organizations with resp= ect to a network operator), the virtual network control and the physical ne= twork domain controls as well as a horizontal E2E service coordination across multi-domain networks. It wil= l identify key building components and the corresponding interfaces among t= hese components.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer= controllers. Well-defined use cases fr= om operators perspective with clearly stated need for transport network vir= tualization are critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;  Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;  Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;  Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;  Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o&= nbsp;  Synchronization of network resources view across physical domain= controls and virtual network control. =

o&= nbsp;  Dynamic service control and monitoring across all entities. =

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span lang=3D"EN-US" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif""> 

 

--_000_B9FEE68CE3A78C41A2B3C67549A96F486D51AF4EFR711WXCHMBA05z_-- From nobody Mon Sep 15 11:15:18 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7AE211A89BB for ; Mon, 15 Sep 2014 11:15:15 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VsaMztthkHBk for ; Mon, 15 Sep 2014 11:15:12 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 785351ACE39 for ; Mon, 15 Sep 2014 10:30:10 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml401-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMQ18868; Mon, 15 Sep 2014 17:30:08 +0000 (GMT) Received: from DFWEML704-CHM.china.huawei.com (10.193.5.141) by lhreml401-hub.china.huawei.com (10.201.5.240) with Microsoft SMTP Server (TLS) id 14.3.158.1; Mon, 15 Sep 2014 18:30:05 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml704-chm ([10.193.5.141]) with mapi id 14.03.0158.001; Mon, 15 Sep 2014 10:29:55 -0700 From: Leeyoung To: Dhruv Dhody , Daniele Ceccarelli , "actn@ietf.org" Thread-Topic: ACTN architecture Thread-Index: Ac/Om8qi9g/D/THATIaDRn5wbOi7GACBkWJQABkBmyA= Date: Mon, 15 Sep 2014 17:29:54 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C348CB@dfweml706-chm> References: <4A1562797D64E44993C5CBF38CF1BE481276015F@ESESSMB301.ericsson.se> <23CE718903A838468A8B325B80962F9B865F029E@szxeml556-mbs.china.huawei.com> In-Reply-To: <23CE718903A838468A8B325B80962F9B865F029E@szxeml556-mbs.china.huawei.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.47.136.164] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C348CBdfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/YVm3LkSewfkhAdp_4tv1UzIXMFQ Subject: Re: [Actn] ACTN architecture X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Sep 2014 18:15:15 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C348CBdfweml706chm_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Dhruv, Here's my comment. Thanks, Young From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: Monday, September 15, 2014 12:22 AM To: Daniele Ceccarelli; actn@ietf.org Subject: Re: [Actn] ACTN architecture Hi Daniele, Young, See inline.. From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Daniele Ceccarelli Sent: 12 September 2014 23:21 To: actn@ietf.org Subject: [Actn] ACTN architecture Reposting my architecture considerations and Young's replies in a dedicated= thread. 1. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. [[DanCe]] Agree. Let's keep track of both of them. [Dhruv]: In the current architecture document we do not use the term 'coord= inator'; In the charter it says - "Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN = controller) for abstracting network resource information to provide virtual= network control functions. This virtual network control functions are embe= dded in a multi-domain network coordinator to support various services/clie= nts/applications to create and manage their own virtual networks that share= the common transport network resources." To me this reads as the coordinator and virtual network control function ar= e embedded together. If we feel that multiple options are okay and need to = be studied, we should relax the text in the charter. YOUNG>> I think VNC-PNC construct is the main architecture interface of ACT= N. Although Architecture document is being prepared, the current assumption= is that PNC has a minimum module as proxy to communicate with VNC. When VN= C deals with multi-domain networks, multi-domain coordination function aris= es within the VNC. I think this is case a (Per Daniele). The coordinator V= NC has to deal with multiple VNCs or PNCs with VN proxy function. For case b (per Daniele), I think we are only concerned about VNC-PNC (as 1= :1) while how the PNC coordinator deals with its domain PNC controller is o= ut of scope of ACTN work in my view. In this case, we are only dealing wi= th the VNC with the PNC coordinator. Multi-domain coordination is "delegat= ed" to the PNC level. So I think your point is that the current charter is more or less case a's = perspective. But I think case a is the base-line case to which ACTN work s= hould be focused on. Case b is subset of case a. Again on multidomain: maybe we could improve the architecture draft saying = is centralized and what is distributed. E.g. VPN prefixes exchange could be= distributed (controllers speaking MP-BGP with each other) while provisioni= ng could be hierarchical (i.e. the coordinator asks controller A to provisi= on a path with domain A and asks controller B to provide a path within B so= to have an end to end path crossing domains A and B)...H-PCE like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? [[DanCe]] The scenarios that come to my mind are more "horizontal". I would= say the either the nodes speak MP-BGP with each other across the domains = (in case of distributed protocols) or the controllers gets the information = from its own domain and then speak MP-BGP with the other controllers "on be= half of their domains" [Dhruv]: I feel this is highly dependent on the physical network controller= s, if its a PCE it has its own way to do inter-PCE communication and if the= controller runs BGP it may directly interact with other controller. IMHO = the ACTN architecture should not impose any restriction on this interaction= , nor make it a pre-requisite as in some case the two controller may not be= able to interact with each other directly (different technology, vendor sp= ecific NMS etc). YOUNG>> I agree with you on this. BR Daniele --_000_7AEB3D6833318045B4AE71C2C87E8E1729C348CBdfweml706chm_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Dhruv,

 

Here’s my commen= t.

 

Thanks,

Young

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: Monday, September 15, 2014 12:22 AM
To: Daniele Ceccarelli; actn@ietf.org
Subject: Re: [Actn] ACTN architecture

 

Hi Daniele, Young,

 

See inline..

 

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
Sent: 12 September 2014 23:21
To: actn@ietf.org
Subject: [Actn] ACTN architecture

 

Reposting my architect= ure considerations and Young’s replies in a dedicated thread.

 

 

1.&n= bsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.

 

YOUNG>> These option= s seem to be detailed architecture that the upcoming architecture document = should address in detail. My personal opinion is that both architectures ne= ed to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial baseli= ne architecture.

[[DanCe]] Agree. Let&#= 8217;s keep track of both of them.

[Dhruv]: In the= current architecture document we do not use the term ‘coordinator= 217;;

In the charter = it says – “Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.”  

To me this read= s as the coordinator and virtual network control function are embedded toge= ther. If we feel that multiple options are okay and need to be studied, we should relax the text in the charter.  

 

YOUNG>> I= think VNC-PNC construct is the main architecture interface of ACTN. Althou= gh Architecture document is being prepared, the current assumption is that PNC has a minimum module as proxy to communicate with VNC. When VN= C deals with multi-domain networks, multi-domain coordination function aris= es within the VNC.  I think this is case a (Per Daniele). The coordina= tor VNC has to deal with multiple VNCs or PNCs with VN proxy function.

 

For case b (per= Daniele), I think we are only concerned about VNC-PNC (as 1:1) while how t= he PNC coordinator deals with its domain PNC controller is out of scope of ACTN work in  my view.  In this case, we are onl= y dealing with the VNC with the PNC coordinator.  Multi-domain coordin= ation is “delegated” to the PNC level.  =

 

So I think your= point is that the current charter is more or less case a’s perspecti= ve.  But I think case a is the base-line case to which ACTN work should be focused on. Case b is subset of case a.

 

Again on multidomain: maybe we could improve the architecture draft sa= ying is centralized and what is distributed. E.g. VPN prefixes exchange cou= ld be distributed (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the= coordinator asks controller A to provision a path with domain A and asks c= ontroller B to provide a path within B so to have an end to end path crossi= ng domains A and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

[[DanCe]] The scenario= s that come to my mind are more “horizontal”. I would say the e= ither the nodes speak MP-BGP with each other across the domains  (in c= ase of distributed protocols) or the controllers gets the information from its own domain and then speak MP-BGP with the other c= ontrollers “on behalf of their domains”

 

[Dhruv]: I feel= this is highly dependent on the physical network controllers, if its a PCE= it has its own way to do inter-PCE communication and if the controller runs BGP  it may directly interact with other controller. = IMHO the ACTN architecture should not impose any restriction on this intera= ction, nor make it a pre-requisite as in some case the two controller may n= ot be able to interact with each other directly (different technology, vendor specific NMS etc).

 

YOUNG>> I= agree with you on this.

 

BR
Daniele

 

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C348CBdfweml706chm_-- From nobody Mon Sep 15 11:57:14 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 159C21A6EE2 for ; Mon, 15 Sep 2014 11:57:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ag_dTa4jef4I for ; Mon, 15 Sep 2014 11:56:59 -0700 (PDT) Received: from ignavia.lancs.ac.uk (ignavia.lancs.ac.uk [148.88.25.16]) by ietfa.amsl.com (Postfix) with ESMTP id 6A0F61A8748 for ; Mon, 15 Sep 2014 11:45:07 -0700 (PDT) Received: from ex-1-ht0.lancs.ac.uk ([10.42.18.57] helo=EX-1-HT0.lancs.local) by ignavia.lancs.ac.uk with esmtp (Exim 4.72) (envelope-from ) id 1XTbGp-0004qT-GM; Mon, 15 Sep 2014 19:45:03 +0100 Received: from EX-0-MB2.lancs.local ([fe80::9d98:936b:54d1:c531]) by EX-1-HT0.lancs.local ([fe80::d9e8:ad10:d075:a6b6%12]) with mapi id 14.03.0174.001; Mon, 15 Sep 2014 19:45:02 +0100 From: "King, Daniel" To: "Y. Richard Yang" , Leeyoung Thread-Topic: [Actn] ACTN charter v1.0 Thread-Index: AQFbR/5w7MfuzrVmHnf/H0kLPTq/RAMiIzy9Acbw7dkB3Bxe8wHQfWyGAg1HGgwCEotQDZyF5bgA Date: Mon, 15 Sep 2014 18:45:02 +0000 Message-ID: <65174429B5AF4C45BD0798810EC48E0A3236576C@EX-0-MB2.lancs.local> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [176.227.128.84] x-iss-local-domain: 1 Content-Type: multipart/alternative; boundary="_000_65174429B5AF4C45BD0798810EC48E0A3236576CEX0MB2lancsloca_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/uX-DfHig1Y489iXqD1JwVr63mvY Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Sep 2014 18:57:11 -0000 --_000_65174429B5AF4C45BD0798810EC48E0A3236576CEX0MB2lancsloca_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 SGkgUmljaGFyZCwNCg0KR29vZCBjb21tZW50cy4gQXMgd2l0aCBtb3N0IGNvbXBsZXggcHJvcG9z YWxzLCBoYXZpbmcgY2xlYXIgZGVmaW5pdGlvbnMsIHRlcm1pbm9sb2d5LCBhbmQgY29uY2VwdHVh bCB2aWV3IGlzIGZ1bmRhbWVudGFsIHRvIHVuZGVyc3RhbmRpbmcgdGhlIHN5c3RlbSBhbmQgc2Nv cGUgb2Ygd29yay4gTXkgc3BlY2lmaWMgY29tbWVudHMgYXJlIGlubGluZSAo4oCcREs+PuKAnSk6 DQoNCkJyLCBEYW4uDQoNCkZyb206IEFDVE4gW21haWx0bzphY3RuLWJvdW5jZXNAaWV0Zi5vcmdd 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X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rhSFwOgMa8KO for ; Mon, 15 Sep 2014 12:02:00 -0700 (PDT) Received: from ignavia.lancs.ac.uk (ignavia.lancs.ac.uk [148.88.25.16]) by ietfa.amsl.com (Postfix) with ESMTP id 2B1811A7000 for ; Mon, 15 Sep 2014 11:51:40 -0700 (PDT) Received: from ex-0-ht0.lancs.ac.uk ([10.42.18.47] helo=EX-0-HT0.lancs.local) by ignavia.lancs.ac.uk with esmtp (Exim 4.72) (envelope-from ) id 1XTbND-0006Is-Ev; Mon, 15 Sep 2014 19:51:39 +0100 Received: from EX-0-MB2.lancs.local ([fe80::9d98:936b:54d1:c531]) by EX-0-HT0.lancs.local ([fe80::7d10:114a:53b0:7f2f%12]) with mapi id 14.03.0174.001; Mon, 15 Sep 2014 19:51:39 +0100 From: "King, Daniel" To: Mike Mossbarger Thread-Topic: [Actn] Joining the group Thread-Index: AQIUIrdXjSeKGNCGl4X/6VdZunIdlgKzsIZyApoYaI2bT3bncA== Date: Mon, 15 Sep 2014 18:51:38 +0000 Message-ID: <65174429B5AF4C45BD0798810EC48E0A3236577E@EX-0-MB2.lancs.local> References: <4A1562797D64E44993C5CBF38CF1BE481276004B@ESESSMB301.ericsson.se> In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [176.227.128.84] x-iss-local-domain: 1 Content-Type: multipart/alternative; boundary="_000_65174429B5AF4C45BD0798810EC48E0A3236577EEX0MB2lancsloca_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/mi8OuT8e6dM6cJiOly4Gnnu7ZDg Cc: "actn@ietf.org" Subject: Re: [Actn] Joining the group X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 15 Sep 2014 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with mapi id 14.03.0158.001; Tue, 16 Sep 2014 17:45:26 +0800 From: Fatai Zhang To: "BELOTTI, SERGIO (SERGIO)" , Aihua Guo , Leeyoung Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAAl1QIAARW8QgAATiLCABG3V0IABJX+g Date: Tue, 16 Sep 2014 09:45:25 +0000 Message-ID: References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <7AEB3D6833318045B4AE71C2C87E8E1729C2F30D@dfweml706-chm> In-Reply-To: Accept-Language: zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.66.72.159] Content-Type: multipart/alternative; boundary="_000_F82A4B6D50F9464B8EBA55651F541CF85CB7B955SZXEMA504MBSchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/nWW57oUGVVtWD07tJt9IiL-VTKw Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Sep 2014 09:45:53 -0000 --_000_F82A4B6D50F9464B8EBA55651F541CF85CB7B955SZXEMA504MBSchi_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Sergio and Aihua, I have the same feeling as Sergio , ie, I am not sure what is "centralized = signaling". Could someone point out where we can find the term about "centralized signa= ling"? Let's have some brainstorm by giving an example. For example, when a MPLS-T= E LSP is to be created by the Openflow controller, can we regard this is "= centralized signaling"? Best Regards Fatai From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of BELOTTI, SERGIO (SER= GIO) Sent: Tuesday, September 16, 2014 12:32 AM To: Aihua Guo; Leeyoung Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Aihua, could you kindly clarify for my knowledge what "PCEP extensions carrying se= rvice related information" you're referring to? If you consider RFC 4655, I do not see any architecture hint that exclude d= istributed signaling as basic method to path setup in a PCE context. On the other hand , the newly draft considering the possibility to use "oth= er" path setup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is introd= ucing a specifc TLV that you need to add if you want to use another method = in your architecture. In fact , the default value proposed for path Setup T= ype field is 0 , implicitly considering RSVP_TE as default setup method. I have difficult to understand what you mean with "service provisioning req= uests may be issued from a centralized controller to all network elements v= ertically and in parallel.". What you mean with vertical and in parallel? On the other hand I do not see when an NMS does not carry service info, whe= ther for service info you consider the path setup info. So I'm still uncomfortable with the term "centralized signaling" in this c= ontext. Thanks Sergio From: Aihua Guo [mailto:AGuo@advaoptical.com] Sent: sabato 13 settembre 2014 00:26 To: Leeyoung; BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio, Regarding your comment, "There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." " Today with e.g. PCEP extensions carrying service related information, servi= ce provisioning requests may be issued from a centralized controller to all= network elements vertically and in parallel. This is IMHO one form of cent= ralized signaling. Service provisioning can be made through NMS, and NMS may or may not includ= e service related information in the management protocols. Hence I still se= e a difference between NMS based and centralized signaling. Would it be wor= th to reflect the difference in the wording with something like this: ? "Allow for distributed signaling or centralized model (e.g.an NMS-based or = centralized signaling) for set up...." Thanks. Aihua From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 3:23 PM To: BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Sergio, I am OK with your suggested wording. Thanks. Young From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com] Sent: Friday, September 12, 2014 10:34 AM To: Leeyoung Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Daniele Please see in line . Thanks Sergio From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: venerd=EC 12 settembre 2014 17:08 To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized = signaling means. NMS based is one of the possibilities but it's not limited= to NMS. A network implementing e.g. Open Flow or any other similar protoco= l should be considered as well IMHO. Here I'm not sure whether we can speak= about centralized signaling in both cases or not. In the case of NMS we us= e the management plane to dynamically provision connectivity (whatever prot= ocol is used). In the case of e.g. Open Flow can we speak about management = plane or is something else? Please note that I speak about OF as it's the o= nly example that comes to my mind but any other possibility can/must be con= sidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." SB> I have still problems with this definition. In my view when you think a= bout to an NMS based path setup, I have a centralized station that is provi= ding command towards managed equipment functions that are virtualized in a = MIB , and these command provide the "resource reservation" phase (not only = but just to make the comparison with normal signaling protocol) using a "ve= rtical" management protocol . There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." 2. On multidomain issues: One question here: How do we want to manage m= ulti-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationship= between virtual network controller and physical network controller plus a = coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator o= f physical network controllers (1:N relationship between coordinator and PN= Cs) with a virtual network controller on top? (1:1 relationship between PNC= coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draft= saying what is centralized and what is distributed. E.g. VPN prefixes exch= ange could be distributed (controllers speaking MP-BGP with each other) whi= le provisioning could be hierarchical (i.e. the coordinator asks controller= A to provision a path with domain A and asks controller B to provide a pat= h within B so to have an end to end path crossing domains A and B)...H-PCE = like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_F82A4B6D50F9464B8EBA55651F541CF85CB7B955SZXEMA504MBSchi_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Sergio and Aihua,

 

I have the same feeling as Sergio , ie, I am not sure what is = 220;centralized signaling”.

 

Could someone point out where we can find the term about “c= entralized signaling”?

 

Let’s have some brainstorm by giving an example. For exampl= e, when a MPLS-TE LSP is to be created by the Openflow controller, can we r= egard this  is “centralized signaling”?

&n= bsp;

&n= bsp;

&n= bsp;

&n= bsp;

Best Re= gards

&n= bsp;

Fatai

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of BELOTTI, SERGIO (SERGIO)
Sent: Tuesday, September 16, 2014 12:32 AM
To: Aihua Guo; Leeyoung
Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Aihua,<= o:p>

 = ;

could y= ou kindly clarify for my knowledge what “PCEP extensions carrying ser= vice related information” you’re referring to?

If you = consider RFC 4655, I do not see any architecture hint that exclude distribu= ted signaling as basic method to path setup in a PCE context.

On the = other hand , the newly draft considering the possibility to use “othe= r” path setup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is i= ntroducing a specifc TLV that you need to add if you want to use another method in your architecture. In fact , the default val= ue proposed for path Setup Type field is 0 , implicitly considering RSVP_TE= as default  setup method.

&n= bsp;

I have = difficult to understand what you mean with “service provisioning requ= ests may be issued from a centralized controller to all network elements ve= rtically and in parallel.”. What you mean with vertical and in parallel?

On the = other hand I do not see when an NMS does not carry service info, whether fo= r service info you consider the path setup info.

So I= 217;m still uncomfortable with the term “centralized signaling”=  in this context.

&n= bsp;

Thanks<= o:p>

Sergio<= o:p>

&n= bsp;

&n= bsp;

From: Aihua Guo [mailto:A= Guo@advaoptical.com]
Sent: sabato 13 settembre 2014 00:26
To: Leeyoung; BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0

 

Hi Serg= io,

&n= bsp;

Regardi= ng your comment,

“= There is no signaling in my= view .

Another cas= e is PCE: PCE is providing path computation phase , and can exploit on a di= stributed control plane to make a signaling of the setup calculated. But ag= ain , it is not a centralized signaling , signaling is distributed , it is the routing, if anything,  that is= centralized in my view.

 =

So I would = suggest to delete the term signaling associated to centralized and change t= he sentence into:

“Allow for distributed signaling or centralized = model (e.g.an NMS-based) for set up….”

”=

&n= bsp;

Today w= ith e.g. PCEP extensions carrying service related information, service prov= isioning requests may be issued from a centralized controller to all networ= k elements vertically and in parallel. This is IMHO one form of centralized signaling.

&n= bsp;

Service= provisioning can be made through NMS, and NMS may or may not include servi= ce related information in the management protocols. Hence I still see a dif= ference between NMS based and centralized signaling. Would it be worth to reflect the difference in the wording with= something like this: ?

&n= bsp;

“Allow for distributed signaling or centralized = model (e.g.an NMS-based or centralized signaling) for set up….”=

&n= bsp;

Thanks.=

Aihua

&n= bsp;

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 3:23 PM
To: BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Serg= io,

&n= bsp;

I am OK= with your suggested wording. Thanks.

&n= bsp;

Young

&n= bsp;

From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com]
Sent: Friday, September 12, 2014 10:34 AM
To: Leeyoung
Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Youn= g, Daniele

&n= bsp;

Please = see in line .

&n= bsp;

Thanks =

Sergio<= o:p>

&n= bsp;

 = ;

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 12 settembre 2014 17:08
To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dani= ele,

&n= bsp;

Thanks = for providing your good comments here. Some of your comment (1) is for char= ter discussion while the others (2 & 3) are architecture discussion. As= a few folks are already working on the architecture document, we may start a new email thread on architecture discussion while= developing the draft.

&n= bsp;

Please = see inline for my response.

&n= bsp;

Regards= ,

Young

&n= bsp;

From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@iet= f.org
Subject: RE: ACTN charter v1.0

 

Dhruv, = Young,

&n= bsp;

Excelle= nt progresses!

Let me = just add some notes/questions.

I’= ;m collecting them here and not inline as the reading of the whole thread i= s becoming pretty complex.

&n= bsp;

= 1.     On centralized signaling: We need to clearly state what centralized signal= ing means. NMS based is one of the possibilities but it’s not limited= to NMS. A network implementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here= I’m not sure whether we can speak about centralized signaling in bot= h cases or not. In the case of NMS we use the management plane to dynamical= ly provision connectivity (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plan= e or is something else? Please note that I speak about OF as it’s the= only example that comes to my mind but any other possibility can/must be c= onsidered.

&n= bsp;

YOUNG&g= t;> The intention here was giving some overview of the tools that curren= t transport networks have. Of course thing are quickly changing with other = initiatives like OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps = good compromise would be putting NMS based as an example. How about restati= ng like:

&n= bsp;

Allow for distributed signa= ling or centralized signaling (e.g., an NMS-based, etc.) for set up….= ”   =

&n= bsp;

SB> I ha= ve still problems with this definition. In my view when you think about to = an NMS based path setup, I have a centralized station that is providing com= mand towards managed equipment functions that are virtualized in a MIB , and these command provide the “resou= rce reservation” phase (not only but just to make the comparison with= normal signaling protocol) using a “vertical” management proto= col .

There is no= signaling in my view .

Another cas= e is PCE: PCE is providing path computation phase , and can exploit on a di= stributed control plane to make a signaling of the setup calculated. But ag= ain , it is not a centralized signaling , signaling is distributed , it is the routing, if anything,  that is= centralized in my view.

 =

So I would = suggest to delete the term signaling associated to centralized and change t= he sentence into:

“Allow for distributed signaling or centralized = model (e.g.an NMS-based) for set up….”

&n= bsp;

&n= bsp;

= 2.     On multidomain issues: One question here: How do we want to manage multi-d= omain? I see two ways:

a.     A coordinator of virtual network controllers – i.e. 1:1 relationship= between virtual network controller and physical network controller plus a = coordinator of virtual network controllers on top

b.     A coordinator of physical network controllers – i.e. a coordinator o= f physical network controllers (1:N relationship between coordinator and PN= Cs) with a virtual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, m= aybe pick one.

&n= bsp;

YOUNG&g= t;> These options seem to be detailed architecture that the upcoming arc= hitecture document should address in detail. My personal opinion is that bo= th architectures need to be considered as a starting point. There may be other variations. Then we may narrow the scop= e as an initial baseline architecture.

&n= bsp;

= 3.     Again on multiodomain: maybe we could improve the architecture draft sayin= g what is centralized and what is distributed. E.g. VPN prefixes exchange c= ould be distributed (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the= coordinator asks controller A to provision a path with domain A and asks c= ontroller B to provide a path within B so to have an end to end path crossi= ng domains A and B)…H-PCE like.

&n= bsp;

YOUNG&g= t;> Good point. I agree that the architecture draft should discuss these= dichotomy of control regimes (e.g., centralized vs. distributed). One ques= tion I have: are you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coor= dinator need to collect the VPN prefixes using the interface between the co= ordinator and each PNC (that speaks MP-BGP)? Then can this be viewed as a c= entralized component?

&n= bsp;

BR
Daniele

&n= bsp;

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

&n= bsp;

From: Dhruv Dhody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments o= n the proposed charter.

 

* Do we need some text in c= harter also to specify what we consider as Transport networks?

 

YOUNG>> That may clar= ify the scope. Do you have any suggestion?  One definition from the Pr= oblem Statement draft (https://datatracker.ietf.org/doc/draft-leeki= ng-actn-problem-statement/) is as follows. Would this be good enough or need more work?

 

T= ransport networks are defined as network infrastructure that

&= nbsp;  provides connectivity and bandwidth for customer services. They=

&= nbsp;  are characterized by their ability to support server layer

&= nbsp;  provisioning and traffic engineering for client layer serv= ices,

&= nbsp;  such that resource guarantees may be provided to their cus= tomers.

&= nbsp;  Transport networks in this document refer to a set of different=

&= nbsp;  type of connection-oriented networks, which include Connection-=

&= nbsp;  Oriented Circuit Switched (CO-CS) networks and Connection-=

&= nbsp;  Oriented Packet Switched (CO-PS) networks. This implies that at

&= nbsp;  least the following transport networks are in scope of the=

&= nbsp;  discussion of this draft: Layer 1 (L1) optical networks (e.g.,

&= nbsp;  Optical Transport Networks (OTN) and Wavelength Switched O= ptical

&= nbsp;  Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerg= ing

&= nbsp;  network technologies with connection-oriented behavior.

 

 

[Dhruv]: Yes that would be good with Eve suggestion and removing ‘= in the document’/’of this draft’.

 

 

* “Transport networks= have a variety of mechanisms to:

-    &n= bsp;          Facilitate separ= ation of data plane and control plane,

-    &n= bsp;          Allow for distri= buted or centralized signaling  for path setup and protection, and

-    &n= bsp;          Provide traffic = engineering mechanism via centralized path computation.”

 

Term ‘centralized sig= naling’ is confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can r= eword the second point: “Allow for distributed signaling or an NMS-ba= sed centralized signaling for set up….”

 

[Dhruv]: That works!

-= ---------------------------

 

* “The architecture w= ork will lead to requirements for information models and protocol extension= s between the virtual network controller and the physical network domain controllers and between the virtual network controller and multi-te= nant customer controllers.”

 

It would be nice to add = 220;multi-domain coordinator” with “virtual network controller&= #8221; to explicitly link them together. Also multi-tenant customer control= lers doesn’t convey the intention to have different customer controllers for each tenan= t, how about…

 

“The architecture wor= k will lead to requirements for information models and protocol extensions = between the virtual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the v= irtual network controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds g= ood to me. Thanks.

 

* “The working group = will determine if new protocol extensions are necessary. If the working gro= up determines they are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other wor= king groups to enhance existing protocols where possible.”=

 

Suggest to re-word this as = it’s not clear – is it about extension to existing protocols or= new protocol and where that work might be taken up. Also Protocol extensio= ns is mentioned as a work item after re-chartering.  <= /p>

 

YOUNG>> New protocol = extensions mean a brand new protocol (say, “ACTN” protocol per = se) that cannot be extended from existing protocols. But there may be some = areas where we need to expand from existing protocols. In such case, we need to = interact with the corresponding WGs. Perhaps an analogy would be that CCAMP= WG is chartered to work on OPSF-TE for specific technologies while OSPF WG= needs to be informed of the protocol changes.

 

[Dhruv]: How about we rewor= d this to – “The working group will determine if new protocol o= r extensions to existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within t= he working group, on the other hand any extensions to existing protocols wo= uld be done  with interactions with other working groups where possibl= e.”

 

* You may want to do charter text formatting in RFC text format taking = care of word-wraps and indentation

YOUNG>> Not sure what you meant here. Please clarify it for me.

[Dhruv]: Refer attachment, this format would help when we upload it to = the data tracker and charter diff tool can help track it better.  

This version has all the changes suggested by me and Eve.

Regards,

Dhruv

Hope you find them useful i= n making the charter text crisp.

 

YOUNG>> Definitely. T= hanks a lot for your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, = I forgot the Subject of this email. Here’s a retransmission with the = subject.

&n= bsp;

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a = good one.

 

We’d like to give you som= e updates and plans on the ACTN work. We are going to request a formal BoF = in Honolulu IETF meeting. In doing so, we need a charter draft as part of t= he due diligence. Here’s an initial charter draft developed by the small set of proponents of the work based on the di= scussions and use-cases and other published documents.  We hope this c= aptures a workable ACTN scope.  This version 1.0 draft charter is also= posted in the wiki: https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be= greatly appreciated to come up with a good charter developed by the commun= ity of interest.  

 

Best regards,=

Young (on behalf of the propone= nts)

 

-------------------------------= draft charter 1.0 ---------------------------------------------------------= -------------------------------------------

 

Transport networks have a variety of mec= hanisms to:

-F= acilitate separation of data plane and control plane,

-A= llow for distributed or centralized signaling  for path setup and prot= ection, and

-     &= nbsp; P= rovide traffic engineering mechanism via centralized path computation.

 

These represent key technologies for ena= bling flexible and dynamic networking, and efficient control and recovery of resources. Although these tech= nologies provide significant benefits within a single domain control bounda= ry, they do not meet the growing need for transport network virtualization = in multi-domain transport networks. More and more network operators are building and operating on multi-domain= transport networks. These domains (collections of links and nodes) may be = each of a different technology, administrative zones, or vendor-specific is= lands. Establishment of end-to-end connections spanning multiple domains is a perpetual problem for operators= because of both operational concerns (control plane and management plane) = and interoperability issues (control plane and data plane).  Due to th= ese issues, new services that require connections that traverse multiple domains need significant planning and o= ften manual operations to interface different vendor equipment and technolo= gy.

 

The aim of Abstraction and Control of Transpo= rt Networks (ACTN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to= view and control multi-subnet, multi-technology, multi-vendor domain netwo= rks. Abstraction of transport networks also allows operators to consolidate= their network services into multi-tenant virtual transport networks. This will enable rapid service deployment of n= ew dynamic and elastic services, and will improve overall network operation= s and scaling of existing services. Discussion with operators has also high= lighted a need for virtual network operation based on the abstraction of underlying technology and vendor dom= ains.

 

Multi-domain network coordination function in= ACTN is built on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control pl= ane, SDN controller) for abstracting network resource information to provid= e virtual network control functions. This virtual network control functions= are embedded in a multi-domain network coordinator to support various services/clients/applications to cr= eate and manage their own virtual networks that share the common transport = network resources.

 

The ACTN working group will work to develo= p a high-level architecture for transport network abstraction and control that facilitates seamless vertical service coordination across= multi-tenant customers (primarily internal service organizations with resp= ect to a network operator), the virtual network control and the physical ne= twork domain controls as well as a horizontal E2E service coordination across multi-domain networks. It wil= l identify key building components and the corresponding interfaces among t= hese components.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer= controllers. Well-defined use cases fr= om operators perspective with clearly stated need for transport network vir= tualization are critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-Operator-driven use cases to address the following initial items= :

o&nb= sp;  Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o&nb= sp;  Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o&nb= sp;  Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o&nb= sp;  Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o&= nbsp;  Synchronization of network resources view across physical domain= controls and virtual network control. =

o&= nbsp;  Dynamic service control and monitoring across all entities. =

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-Evaluation of Information model/data model to support the use ca= ses.

-Requirements to support APIs/protocols, encoding languages, and = data models

-Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span lang=3D"EN-US" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif""> 

 

--_000_F82A4B6D50F9464B8EBA55651F541CF85CB7B955SZXEMA504MBSchi_-- From nobody Tue Sep 16 03:01:09 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E5EE01A04AC for ; Tue, 16 Sep 2014 03:01:06 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.852 X-Spam-Level: X-Spam-Status: No, score=-5.852 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mgIUVD6uppze for ; Tue, 16 Sep 2014 03:01:02 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C6FD41A027C for ; Tue, 16 Sep 2014 03:01:01 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml405-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJM81642; Tue, 16 Sep 2014 10:01:00 +0000 (GMT) Received: from SZXEML415-HUB.china.huawei.com (10.82.67.154) by lhreml405-hub.china.huawei.com (10.201.5.242) with Microsoft SMTP Server (TLS) id 14.3.158.1; Tue, 16 Sep 2014 11:00:58 +0100 Received: from szxeml556-mbs.china.huawei.com ([169.254.4.112]) by szxeml415-hub.china.huawei.com ([10.82.67.154]) with mapi id 14.03.0158.001; Tue, 16 Sep 2014 18:00:45 +0800 From: Dhruv Dhody To: Leeyoung , Daniele Ceccarelli , "actn@ietf.org" Thread-Topic: ACTN architecture Thread-Index: Ac/Om8qi9g/D/THATIaDRn5wbOi7GACBkWJQABkBmyAAFQGYgA== Date: Tue, 16 Sep 2014 10:00:45 +0000 Message-ID: <23CE718903A838468A8B325B80962F9B865F50B1@szxeml556-mbs.china.huawei.com> References: <4A1562797D64E44993C5CBF38CF1BE481276015F@ESESSMB301.ericsson.se> <23CE718903A838468A8B325B80962F9B865F029E@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C348CB@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C348CB@dfweml706-chm> Accept-Language: en-GB, zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.18.146.248] Content-Type: multipart/alternative; boundary="_000_23CE718903A838468A8B325B80962F9B865F50B1szxeml556mbschi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/_5-GHyqlKS0pRLiuXtmKNhdfmJY Subject: Re: [Actn] ACTN architecture X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Sep 2014 10:01:07 -0000 --_000_23CE718903A838468A8B325B80962F9B865F50B1szxeml556mbschi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Young, Please see inline, look for [Dhruv2]. From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Daniele Ceccarelli Sent: 12 September 2014 23:21 To: actn@ietf.org Subject: [Actn] ACTN architecture Reposting my architecture considerations and Young's replies in a dedicated= thread. 1. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. [[DanCe]] Agree. Let's keep track of both of them. [Dhruv]: In the current architecture document we do not use the term 'coord= inator'; In the charter it says - "Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN = controller) for abstracting network resource information to provide virtual= network control functions. This virtual network control functions are embe= dded in a multi-domain network coordinator to support various services/clie= nts/applications to create and manage their own virtual networks that share= the common transport network resources." To me this reads as the coordinator and virtual network control function ar= e embedded together. If we feel that multiple options are okay and need to = be studied, we should relax the text in the charter. YOUNG>> I think VNC-PNC construct is the main architecture interface of ACT= N. Although Architecture document is being prepared, the current assumption= is that PNC has a minimum module as proxy to communicate with VNC. When VN= C deals with multi-domain networks, multi-domain coordination function aris= es within the VNC. I think this is case a (Per Daniele). The coordinator V= NC has to deal with multiple VNCs or PNCs with VN proxy function. [Dhruv 2]: In my opinion what Daniele suggest is more like - Daniele Case a: Virtual network Coordinator | | -------------+------------ | | | | | | VNC VNC VNC | | | | | | PNC PNC PNC Daniele Case b: VNC | | Physical network Coordinator | | -------------+------------ | | | | | | PNC PNC PNC Here the key difference is - 'multi-domain coordinator function' to be enga= ging with VNCs or PNCs in the southbound. >From your description I gather that the 'multi-domain coordinator function'= can interact with multiple VNC (case a) or interact with multiple PNC (cas= e b) which I also think is valid. Making this look like.... Multi-domain Coordinator (parent | -VNC) | -------------+------------ | | | | | | VNC VNC VNC | | | | | | PNC PNC PNC VNC | (probably embedded | together) Multi-domain Coordinator | | -------------+------------ | | | | | | PNC PNC PNC For case b (per Daniele), I think we are only concerned about VNC-PNC (as 1= :1) while how the PNC coordinator deals with its domain PNC controller is o= ut of scope of ACTN work in my view. In this case, we are only dealing wi= th the VNC with the PNC coordinator. Multi-domain coordination is "delegat= ed" to the PNC level. [Dhruv 2]: I am not sure what you mean here? So I think your point is that the current charter is more or less case a's = perspective. But I think case a is the base-line case to which ACTN work s= hould be focused on. Case b is subset of case a. I am not to sure The charter text thus seems more closely related to case (b) where a multi-= domain coordinator interacts with domain controllers (PNC) and this functio= n resides with virtual network control function. [Dhruv 2]: Yes. Again on multidomain: maybe we could improve the architecture draft saying = is centralized and what is distributed. E.g. VPN prefixes exchange could be= distributed (controllers speaking MP-BGP with each other) while provisioni= ng could be hierarchical (i.e. the coordinator asks controller A to provisi= on a path with domain A and asks controller B to provide a path within B so= to have an end to end path crossing domains A and B)...H-PCE like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? [[DanCe]] The scenarios that come to my mind are more "horizontal". I would= say the either the nodes speak MP-BGP with each other across the domains = (in case of distributed protocols) or the controllers gets the information = from its own domain and then speak MP-BGP with the other controllers "on be= half of their domains" [Dhruv]: I feel this is highly dependent on the physical network controller= s, if its a PCE it has its own way to do inter-PCE communication and if the= controller runs BGP it may directly interact with other controller. IMHO = the ACTN architecture should not impose any restriction on this interaction= , nor make it a pre-requisite as in some case the two controller may not be= able to interact with each other directly (different technology, vendor sp= ecific NMS etc). YOUNG>> I agree with you on this. BR Daniele --_000_23CE718903A838468A8B325B80962F9B865F50B1szxeml556mbschi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Young,

 

Please see inline, look for [Dhruv2].

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
Sent: 12 September 2014 23:21
To: actn@ietf.org
Subject: [Actn] ACTN architecture

 

Reposting my architect= ure considerations and Young’s replies in a dedicated thread.

 

 

1.&= nbsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.<= o:p>

 

YOUNG>> These option= s seem to be detailed architecture that the upcoming architecture document = should address in detail. My personal opinion is that both architectures ne= ed to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial baseli= ne architecture.

[[DanCe]] Agree. Let&#= 8217;s keep track of both of them.

[Dhruv]: In the= current architecture document we do not use the term ‘coordinator= 217;;

In the charter = it says – “Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.”  

To me this read= s as the coordinator and virtual network control function are embedded toge= ther. If we feel that multiple options are okay and need to be studied, we should relax the text in the charter.  

 

YOUNG>> I= think VNC-PNC construct is the main architecture interface of ACTN. Althou= gh Architecture document is being prepared, the current assumption is that PNC has a minimum module as proxy to communicate with VNC. When VN= C deals with multi-domain networks, multi-domain coordination function aris= es within the VNC.  I think this is case a (Per Daniele). The coordina= tor VNC has to deal with multiple VNCs or PNCs with VN proxy function.

[Dhruv 2]: &nbs= p;In my opinion what Daniele suggest is more like -

Daniele Case a:=

 

  &nb= sp;            =   Virtual network Coordinator

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            VNC&n= bsp;          VNC  &= nbsp;       VNC

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            PNC&n= bsp;          PNC  &= nbsp;       PNC

  &nb= sp;      

 

Daniele Case b:=          

  &nb= sp;            =             &nb= sp; VNC          &nb= sp;

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   Physical network Coordinator

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;             = ;            &n= bsp; |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            PNC&n= bsp;          PNC  &= nbsp;       PNC

 

Here the key difference is – ‘multi-domain coordinator func= tion’ to be engaging with VNCs or PNCs in the southbound.

From your description I gather that the ‘multi-domain coordinator= function’ can interact with multiple VNC (case a) or interact with multiple PNC (case b) which I also think is valid.

Making this look like….

  &nb= sp;            =      Multi-domain Coordinator (parent=

  &nb= sp;            =             &nb= sp;  |          &nbs= p;    -VNC)

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            VNC&n= bsp;          VNC  &= nbsp;       VNC

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            PNC&n= bsp;          PNC  &= nbsp;       PNC     =  

  &nb= sp;            =

  &nb= sp;            =             &nb= sp; 

  &nb= sp;            =             &nb= sp; VNC          &nb= sp;

  &nb= sp;            =             &nb= sp;  | (probably embedded

  &nb= sp;            =             &nb= sp;  |  together)

  &nb= sp;            =     Multi-domain Coordinator     &n= bsp;            = ;            &n= bsp;   

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

   &n= bsp;            = ; PNC          PNC &= nbsp;        PNC

 

 

For case b (per= Daniele), I think we are only concerned about VNC-PNC (as 1:1) while how t= he PNC coordinator deals with its domain PNC controller is out of scope of ACTN work in  my view.  In this case, we are onl= y dealing with the VNC with the PNC coordinator.  Multi-domain coordin= ation is “delegated” to the PNC level.  =

[Dhruv 2]: I am= not sure what you mean here?

 

So I think your= point is that the current charter is more or less case a’s perspecti= ve.  But I think case a is the base-line case to which ACTN work should be focused on. Case b is subset of case a.

 

I am not to sure

 

The charter text thus seems more closely related to case (b) where a mu= lti-domain coordinator interacts with domain controllers (PNC) and this function resides with virtual network control function.

[Dhruv 2]: Yes.

     &nbs= p;         

Again on multidomain: maybe we could improve the architecture draft sa= ying is centralized and what is distributed. E.g. VPN prefixes exchange cou= ld be distributed (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the= coordinator asks controller A to provision a path with domain A and asks c= ontroller B to provide a path within B so to have an end to end path crossi= ng domains A and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

[[DanCe]] The scenario= s that come to my mind are more “horizontal”. I would say the e= ither the nodes speak MP-BGP with each other across the domains  (in c= ase of distributed protocols) or the controllers gets the information from its own domain and then speak MP-BGP with the other c= ontrollers “on behalf of their domains”

 

 

[Dhruv]: I feel= this is highly dependent on the physical network controllers, if its a PCE= it has its own way to do inter-PCE communication and if the controller runs BGP  it may directly interact with other controller. = IMHO the ACTN architecture should not impose any restriction on this intera= ction, nor make it a pre-requisite as in some case the two controller may n= ot be able to interact with each other directly (different technology, vendor specific NMS etc).

 

YOUNG>> I= agree with you on this.

 

BR
Daniele

 

--_000_23CE718903A838468A8B325B80962F9B865F50B1szxeml556mbschi_-- From nobody Tue Sep 16 05:20:27 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4B4111A0697 for ; Tue, 16 Sep 2014 05:18:36 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.996 X-Spam-Level: X-Spam-Status: No, score=-2.996 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HELO_IS_SMALL6=0.556, HTML_FONT_LOW_CONTRAST=0.001, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-1.652, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JANoZ8WUwOJn for ; Tue, 16 Sep 2014 05:18:29 -0700 (PDT) Received: from catr.cn (catrma.catr.cn [219.239.97.64]) by ietfa.amsl.com (Postfix) with ESMTP id 26B7A1A02D4 for ; Tue, 16 Sep 2014 05:18:26 -0700 (PDT) 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http://mailarchive.ietf.org/arch/msg/actn/_ZRZsmsqBoYCe7RAKYjyQ-y2W7o X-Mailman-Approved-At: Tue, 16 Sep 2014 05:20:24 -0700 Cc: zhangguoying Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Sep 2014 12:18:36 -0000 This is a multi-part message in MIME format. ------=_001_NextPart831616431851_=---- Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: base64 aGksIFlvbmcsDQoNClRoZXJlIGFyZSBzb21lIGNvbW1lbnRzIGZvciBBQ1ROIGNoYXJ0ZXIsIHRo YW5rcy4NCg0KMe+8iUl0IGlzIHN1cHBvc2VkIGZvciB0aGUgQUNUTiBjaGFydGVyIHRvIGNhcnJ5 IG9uIHJlc2VhcmNoIG9mIHRoZSBhYnN0cmFjdGlvbiBhbmQgbW9kZWxpbmcgbWV0aG9kIGZvciB0 cmFuc3BvcnQgcmVzb3VyY2VzIGluIG11bHRpLWRvbWFpbiBhbmQgbXVsdGktdmVuZGVyIGVudmly b25tZW50LiBUaGUgdHJhbnNwb3J0IG5ldHdvcmsgcmVzb3VyY2VzIG1vZGVsaW5nIG1ldGhvZCBz 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hi, Yong,

There = are some comments for ACTN charter, thanks.

1=EF=BC=89It is supposed for the ACTN charter to carry on rese= arch of the abstraction and modeling method for transport resources in mul= ti-domain and multi-vender environment. The transport network resources mo= deling method should meet the requirements of each domain controlle= r (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller), such as applic= ation oriented modeling method (from top to bottom) or network resources o= riented modeling methods (from bottom to top).
= 2) For the dynamic service control and monitoring, the alarm and performan= ce data  transfer between different controllers may be based on PUSH = mode or PULL mode, analysis the applicability of these two modes for diffe= rent controllers, the extension based on existing protocol (such as Restfu= l/Openflow) may be developed.
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Best =0ARegards

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Xu =0AYunbin =E5=BE=90=E4=BA=91=E6=96= =8C 

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= =E4=BC=A0=E9= =80=81=E4=B8=8E=E6=8E=A5=E5=85=A5=E7=A0=94=E7=A9=B6=E9=83=A8

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=E5=B7=A5=E4=B8=9A= =E5=92=8C=E4=BF=A1=E6=81=AF=E5=8C=96=E9=83=A8=E7=94=B5=E4=BF=A1=E7=A0=94= =E7=A9=B6=E9=99=A2=E9=80=9A=E4=BF=A1=E6=A0=87=E5=87=86=E7=A0=94=E7=A9=B6= =E6=89=80=EF=BC=88=E5=8E=9F=E5=B7=A5=E4=B8=9A=E5=92=8C=E4=BF=A1=E6=81=AF=E5=8C=96= =E9=83=A8=E7=94=B5=E4=BF=A1=E4=BC=A0=E8=BE=93=E7=A0=94=E7=A9=B6=E6=89=80= =EF=BC=89<= o:p style=3D"FONT-SIZE: 10pt; COLOR: #000080">

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Research =0AInstitute of Telecommunic= ations Transmission (RITT),=

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China =0AA= cademy of Telecom. Research (CATR), MIIT

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TEL: =0A86-10-62300112, 86-18601328841

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E-mail: =0A<= a href=3D"mailto:xuyunbin@ritt.cn" target=3D"_blank">xuyunbin@ritt.cn= =0A,   xuyunbin@catr.cn

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From: Leeyoung
Date: 2= 014-09-11 23:17
Subject: Re: [A= ctn] ACTN charter v1.0
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<= span style=3D"color:#1F497D">Hi Dhruv,

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= =0A

Thanks for pro= viding your valuable comment.=0A

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Please see inline fo= r my response. Thanks.

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=  

=0A

Young

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 =

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From: Dhruv Dhody=0A
=0ASent: Wednes= day, September 10, 2014 10:48 PM
=0ATo: Leeyoung; Leeyoung; actn= @ietf.org
=0ASubject: RE: ACTN charter v1.0=0A

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=0A<= p class=3D"MsoNormal" style=3D"margin: 0px 0in; font-size: 11pt; font-fami= ly: Calibri, sans-serif;">Hi Young,=0A

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Please find some comments on the proposed= charter.

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* Do = we need some text in charter also to specify what we consider as Transport= networks?=0A

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YOU= NG>> That may clarify the scope. Do you have any suggestion?  O= ne definition from the Problem Statement draft (https://datatracker.ietf.org/doc/draft-l= eeking-actn-problem-statement/)=0A is as follows. Would this be good e= nough or need more work?

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T= ransport networks are defined as network infrastructure that=0A

   provides connectivity and band= width for customer services. They

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   are characterized by their ability to support server laye= r=0A

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   provisi= oning and traffic engineering for client layer services,=0A

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   such that resource guarant= ees may be provided to their customers.

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   Transport networks in this document refer to a set = of different

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   type= of connection-oriented networks, which include Connection-

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   Oriented Circuit Switched (CO-C= S) networks and Connection-

=0A

&= nbsp;  Oriented Packet Switched (CO-PS) networks. This implies that a= t=0A

=0A

   least t= he following transport networks are in scope of the

=0A

   discussion of this draft: Layer 1 (L1) = optical networks (e.g.,=0A

=0A

&= nbsp;  Optical Transport Networks (OTN) and Wavelength Switched = Optical=0A

=0A

   N= etworks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging=0A

   network technologies with conn= ection-oriented behavior.

=0A

 

=0A

 

=0A

* = =E2=80=9CTransport networks have a variety of mechanisms to:

=0A

-    =            Facilitate se= paration of data plane and control plane,=0A

=0A

-      &nbs= p;        Allow for distributed or cent= ralized signaling  for path setup and protection, and=0A

=0A

-    = ;           Provide traf= fic engineering mechanism via centralized path computation.=E2=80=9D<= /o:p>

=0A

 =

=0A

Term =E2=80=98centrali= zed signaling=E2=80=99 is confusing to me, do you mean, the use of NMS?

=0A

 

=0A

YOUNG>> Yes. = We can reword the second point: =E2=80=9CAllow for distributed signaling o= r an NMS-based centralized signaling for set up=E2=80=A6.=E2=80=9D=0A=

=0A

 

=0A

* =E2=80=9CThe archit= ecture work will lead to requirements for information models and protocol = extensions between the virtual network controller and the physical network= domain controllers=0A and between the virtual network controller and mult= i-tenant customer controllers.=E2=80=9D=0A

=0A

 

=0A

It would be nice to add =E2=80=9Cmulti-domain co= ordinator=E2=80=9D with =E2=80=9Cvirtual network controller=E2=80=9D to ex= plicitly link them together. Also multi-tenant customer controllers doesn= =E2=80=99t convey=0A the intention to have different customer controllers = for each tenant, how about=E2=80=A6

=0A

 

=0A

=E2=80=9CThe architecture work will lead to requirement= s for information models and protocol extensions between the virtual netwo= rk controller (embedded in a multi-domain coordinator)=0A and the physical= network domain controllers and between the virtual network controller and= multiple tenant customer controllers.=E2=80=9D=0A

= =0A

 

=0AYOUNG>> This sounds good to me. = Thanks.=0A

=0A

=  

=0A

* =E2= =80=9CThe working group will determine if new protocol extensions are nece= ssary. If the working group determines they are necessary, then it will de= velop the new protocols within=0A the working group where necessary, while= interacting with other working groups to enhance existing protocols where= possible.=E2=80=9D

=0A

<= span style=3D"font-family:"Candara","sans-serif";color= :#993366"> 

=0A

Suggest to re-word this as it=E2=80=99s not clear =E2=80=93 is it abo= ut extension to existing protocols or new protocol and where that work mig= ht be taken up. Also Protocol extensions is mentioned=0A as a work item af= ter re-chartering.  

=0A

 

=0A

<= span style=3D"font-family:"Candara","sans-serif";color= :#993366">YOUNG>> New protocol extensions mean a brand new protocol = (say, =E2=80=9CACTN=E2=80=9D protocol per se) that cannot be extended from= existing protocols. But there may be some areas where we=0A need to expan= d from existing protocols. In such case, we need to interact with the corr= esponding WGs. Perhaps an analogy would be that CCAMP WG is chartered to w= ork on OPSF-TE for specific technologies while OSPF WG needs to be informe= d of the protocol changes.=0A

=0A

 

=0A

* You may want to do charter text formatting in RFC text form= at taking care of word-wraps and indentation

=0A

YOUNG>> Not sure what you meant her= e. Please clarify it for me.=0A

=0A

Hope you find them useful in making the charter text c= risp.=0A

=0A

 

=0A

YOUNG>= ;> Definitely. Thanks a lot for your review and great comments.=0A=

=0A

 

=0A

Dhruv

=0A

 =0A

 

=0A<= div style=3D"border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in = 4.0pt">=0A
=0A
=0A

From: ACTN [mailto:actn-bounces@ietf.org]=0AO= n Behalf Of Leeyoung
=0ASent: 10 September 2014 04:53
=0A= To: Leeyoung; actn@ietf.org
=0ASubject: [Actn] ACTN chart= er v1.0

=0A
=0A
=0A

 

=0A

Sorry, I forgot the Subject of this email. Here=E2=80=99s a retr= ansmission with the subject.

=0A

 

=0A
= =0A
=0A

From: Leeyoung=0A
=0ASent: Tuesday, September 09, 2014 = 3:47 PM
=0ATo: actn@ietf.org
=0ASubject:=

=0A
=0A
=0A

<= o:p> 

=0A

Hi,

=0A

 

=0A

I hope your summer break was a good one.

=0A

 

=0A

We=E2=80= =99d like to give you some updates and plans on the ACTN work. We are goin= g to request a formal BoF in Honolulu IETF meeting. In doing so, we need a= charter draft as part of the due diligence. Here=E2=80=99s an initial cha= rter draft developed by=0A the small set of proponents of the work based o= n the discussions and use-cases and other published documents.  We ho= pe this captures a workable ACTN scope.  This version 1.0 draft chart= er is also posted in the wiki:=0Ahttps://sites.google.com/site/actnbof/home/charter-propor=0A

=0A

 

=0A

Your review and comment will be greatly appreciated to = come up with a good charter developed by the community of interest.  =

=0A

 

=0A

Best regards,

=0A

Young (on behalf of the proponents)

=0A

 

=0A

----------= ---------------------draft charter 1.0 -----------------------------------= -----------------------------------------------------------------

=0A

 

=0A

Transport networks have a variety of mechanisms to:=

=0A

=0A-      = =0AFacilitate separation= of data plane and control plane,=0A

=0A

=0A-&= nbsp;     =0AAllow for distributed or centralized signaling  for pat= h setup and protection, and=0A

=0A

=0A-      =0AProvide traffic engineering mechanism via= centralized path computation.=0A

=0A

 

=0A

These= represent key technologies for enabling flexible and dynamic networking, = and efficient control and recovery=0A of resources. Although these technologies provide significant benefits within a si= ngle domain control boundary, they do not meet the growing need for transp= ort network virtualization in multi-domain transport networks. More and mo= re=0A network operators are building and operating on multi-domain transpo= rt networks. These domains (collections of links and nodes) may be each of= a different technology, administrative zones, or vendor-specific islands.= Establishment of end-to-end connections=0A spanning multiple domains is a= perpetual problem for operators because of both operational concerns (con= trol plane and management plane) and interoperability issues (control plan= e and data plane).  Due to these issues, new services that require co= nnections=0A that traverse multiple domains need significant planning and = often manual operations to interface different vendor equipment and techno= logy.=0A

=0A

 

=0A

The aim of Abstraction and Control of Transport Net= works (ACTN) is to facilitate a centralized virtual network operation:=0A = the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstr= action of transport networks also allows operators to consolidate their ne= twork services into multi-tenant virtual=0A transport networks. This will = enable rapid service deployment of new dynamic and elastic services, and w= ill improve overall network operations and scaling of existing services. D= iscussion with operators has also highlighted a need for virtual network o= peration=0A based on the abstraction of underlying technology and vendor d= omains.

=0A

 

= =0A

Multi-domain network coordination function in ACTN is buil= t on a control hierarchy where a multi-domain coordinator interacts=0A wit= h each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN cont= roller) for abstracting network resource information to provide virtual ne= twork control functions. This virtual network control functions are embedd= ed in a multi-domain network coordinator=0A to support various services/cl= ients/applications to create and manage their own virtual networks that sh= are the common transport network resources.=0A

=0A

 

=0A

The ACTN working group w= ill work to develop a high-level architecture for transport network abstra= ction and control=0A that facilitates seamless vertical service coordinati= on across multi-tenant customers (primarily internal service organizations= with respect to a network operator), the virtual network control and the = physical network domain controls as well as a horizontal=0A E2E service co= ordination across multi-domain networks. It will identify key building com= ponents and the corresponding interfaces among these components.  The= architecture work will lead to=0A requirements for information models and protocol e= xtensions between the virtual network controller and the physical network = domain controllers=0A= and between the=0Avirtual network controller=0A= and multi-tenant customer controllers.=0AWell-defined use cases from operators perspective with clearly stated= need for transport network virtualization are critical in scoping the wor= k and thus to achieve the=0A deliverables of the working group.=

=0A

 

=0A<= p class=3D"MsoNormal" style=3D"line-height: 150%; margin: 0px 0in; font-si= ze: 11pt; font-family: Calibri, sans-serif;">The working group will work on the following it= ems:

=0A

=0A-      =0A<= /span>High-= level architecture that describes the basic building blocks to enable tran= sport network virtualization to support use=0A cases.=0A

=0A-      =0AOperator-driven use cases to= address the following initial items:

=0A

= =0A= o   = =0AVirtual network control and operation for core transport Packet Opti= cal Integration (POI). (e.g., MPLS-TP, OTN/WSON)=0A

= =0A

=0Ao&nbs= p;  =0AVirtual network control and operation for mobile backh= aul multi-technology transport (e.g., MPLS-TP and MPLS/OTN)

=0A

=0Ao   =0AData Center Operator=E2=80=99s interconnection = with optical transport network infrastructure providers to support dynamic= virtual=0A circuit services.

=0A

=0Ao   =0AMu= lti-tenant support to allow virtual network information query, virtual net= work negotiation, creation/deletion and modification.=0A

=0Ao  &nbs= p;=0ASynchronization of network resources view across physical domain c= ontrols and virtual network control.=0A

=0A

=0Ao   =0ADynamic service control and monitoring acros= s all entities.=0A<= /o:p>

=0A

Initial work within the working group will be limited to a = single operator administrative=0A domain with an exception for the Data Ce= nter operation use case.

=0A

=0A-    &n= bsp; =0AEvaluation of Information model/data model to support the = use cases.

=0A

=0A-      =0ARequirements to support APIs/protocols, encoding languages, and data mode= ls

=0A

=0A-      =0AGap ana= lysis of existing IETF and other protocols, encoding languages and data mo= dels to fulfill the requirements.=0A

=0A

= =0A-  &= nbsp;   =0AProtocol extensions (if necessary after re-c= hartering).

=0A

 = ;

=0A

The working group will de= termine if new protocol extensions are necessary. If the working group det= ermines=0A they are necessary, then it will develop the new protocols with= in the working group where necessary, while interacting with other working= groups to enhance existing protocols where possible.=0A=

=0A

 

=0A

 

=0A

 

=0A=0A
=0A
=0A ------=_001_NextPart831616431851_=------ From nobody Tue Sep 16 09:36:47 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2D62C1A0392 for ; Tue, 16 Sep 2014 09:36:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.551 X-Spam-Level: X-Spam-Status: No, score=-3.551 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-1.652] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 94CsIUUe8kSe for ; Tue, 16 Sep 2014 09:36:31 -0700 (PDT) Received: from mail3.advaoptical.com (mail3.advaoptical.com [74.202.24.82]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 55CBB1A8704 for ; Tue, 16 Sep 2014 09:36:22 -0700 (PDT) Received: from atl-srv-mail10.atl.advaoptical.com (atl-srv-mail10.atl.advaoptical.com [172.16.5.39]) by atl-vs-fsmail.advaoptical.com (8.14.5/8.14.5) with ESMTP id s8GGa7xx016994 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Tue, 16 Sep 2014 12:36:07 -0400 Received: from ATL-SRV-MBX1.advaoptical.com (172.16.5.45) by atl-srv-mail10.atl.advaoptical.com (172.16.5.39) with Microsoft SMTP Server (TLS) id 14.3.181.6; Tue, 16 Sep 2014 12:36:07 -0400 Received: from ATL-SRV-MBX1.advaoptical.com (172.16.5.45) by ATL-SRV-MBX1.advaoptical.com (172.16.5.45) with Microsoft SMTP Server (TLS) id 15.0.995.29; Tue, 16 Sep 2014 12:36:06 -0400 Received: from ATL-SRV-MBX1.advaoptical.com ([fe80::6433:f8f:ea41:a6e1]) by ATL-SRV-MBX1.advaoptical.com ([fe80::6433:f8f:ea41:a6e1%14]) with mapi id 15.00.0995.028; Tue, 16 Sep 2014 12:36:06 -0400 From: Aihua Guo To: Fatai Zhang , "BELOTTI, SERGIO (SERGIO)" , Leeyoung Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAAl1QIAARW8QgAATiLCABG3V0IABJX+ggABgrwA= Date: Tue, 16 Sep 2014 16:36:05 +0000 Message-ID: References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <7AEB3D6833318045B4AE71C2C87E8E1729C2F30D@dfweml706-chm> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.16.5.49] Content-Type: multipart/alternative; boundary="_000_df57847874454fd9a249111a1e191456ATLSRVMBX1advaopticalco_" MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.12.52, 1.0.28, 0.0.0000 definitions=2014-09-16_05:2014-09-16,2014-09-16,1970-01-01 signatures=0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/uk_pTk6KipDP_2Un4J7CdzmrRrk Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Sep 2014 16:36:45 -0000 --_000_df57847874454fd9a249111a1e191456ATLSRVMBX1advaopticalco_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Sergio and Fatai, What I consider for "centralized signaling" is in a scenario where there is= a centralized service controller and a network consisting of multiple netw= ork elements (NEs). In this scenario, the centralized service controller is= sues "vertical" path setup requests from the controller to all NEs at the s= ame time ("in parallel"). Each network element receives a segment of the pa= th for NE itself. This can be done by using PCEP as a transport protocol ca= rrying either standard or proprietary extensions for services, with other e= xtensions e.g. draft-sivabalan-pce-lsp-setup-type-02.txt to specify alterna= tives other than RSVP-TE for each NE. I am in line with you that there is no signaling with an NMS approach, and = NMS for sure stores service information in some format. My question is if t= he above scenario or the similar is viewed as somewhat different from an NM= S based approach. And also the same question for the Openflow scenario Fatai raised. Thanks. Aihua From: Fatai Zhang [mailto:zhangfatai@huawei.com] Sent: Tuesday, September 16, 2014 5:45 AM To: BELOTTI, SERGIO (SERGIO); Aihua Guo; Leeyoung Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio and Aihua, I have the same feeling as Sergio , ie, I am not sure what is "centralized = signaling". Could someone point out where we can find the term about "centralized signa= ling"? Let's have some brainstorm by giving an example. For example, when a MPLS-T= E LSP is to be created by the Openflow controller, can we regard this is "= centralized signaling"? Best Regards Fatai From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of BELOTTI, SERGIO (SER= GIO) Sent: Tuesday, September 16, 2014 12:32 AM To: Aihua Guo; Leeyoung Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Aihua, could you kindly clarify for my knowledge what "PCEP extensions carrying se= rvice related information" you're referring to? If you consider RFC 4655, I do not see any architecture hint that exclude d= istributed signaling as basic method to path setup in a PCE context. On the other hand , the newly draft considering the possibility to use "oth= er" path setup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is introd= ucing a specifc TLV that you need to add if you want to use another method = in your architecture. In fact , the default value proposed for path Setup T= ype field is 0 , implicitly considering RSVP_TE as default setup method. I have difficult to understand what you mean with "service provisioning req= uests may be issued from a centralized controller to all network elements v= ertically and in parallel.". What you mean with vertical and in parallel? On the other hand I do not see when an NMS does not carry service info, whe= ther for service info you consider the path setup info. So I'm still uncomfortable with the term "centralized signaling" in this c= ontext. Thanks Sergio From: Aihua Guo [mailto:AGuo@advaoptical.com] Sent: sabato 13 settembre 2014 00:26 To: Leeyoung; BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio, Regarding your comment, "There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." " Today with e.g. PCEP extensions carrying service related information, servi= ce provisioning requests may be issued from a centralized controller to all= network elements vertically and in parallel. This is IMHO one form of cent= ralized signaling. Service provisioning can be made through NMS, and NMS may or may not includ= e service related information in the management protocols. Hence I still se= e a difference between NMS based and centralized signaling. Would it be wor= th to reflect the difference in the wording with something like this: ? "Allow for distributed signaling or centralized model (e.g.an NMS-based or = centralized signaling) for set up...." Thanks. Aihua From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 3:23 PM To: BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Sergio, I am OK with your suggested wording. Thanks. Young From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com] Sent: Friday, September 12, 2014 10:34 AM To: Leeyoung Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Daniele Please see in line . Thanks Sergio From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: venerd=EC 12 settembre 2014 17:08 To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized= signaling means. NMS based is one of the possibilities but it's not limite= d to NMS. A network implementing e.g. Open Flow or any other similar protoc= ol should be considered as well IMHO. Here I'm not sure whether we can spea= k about centralized signaling in both cases or not. In the case of NMS we u= se the management plane to dynamically provision connectivity (whatever pro= tocol is used). In the case of e.g. Open Flow can we speak about management= plane or is something else? Please note that I speak about OF as it's the = only example that comes to my mind but any other possibility can/must be co= nsidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." SB> I have still problems with this definition. In my view when you think a= bout to an NMS based path setup, I have a centralized station that is provi= ding command towards managed equipment functions that are virtualized in a = MIB , and these command provide the "resource reservation" phase (not only = but just to make the comparison with normal signaling protocol) using a "ve= rtical" management protocol . There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." 2. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draf= t saying what is centralized and what is distributed. E.g. VPN prefixes exc= hange could be distributed (controllers speaking MP-BGP with each other) wh= ile provisioning could be hierarchical (i.e. the coordinator asks controlle= r A to provision a path with domain A and asks controller B to provide a pa= th within B so to have an end to end path crossing domains A and B)...H-PCE= like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_df57847874454fd9a249111a1e191456ATLSRVMBX1advaopticalco_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi Sergio and Fatai,

 

What I consider for &#= 8220;centralized signaling” is in a scenario where there is a central= ized service controller and a network consisting of multiple network elemen= ts (NEs). In this scenario, the centralized service controller issues “vertical” path setup requests from the cont= roller to all NEs at the same time (“in parallel”). Each networ= k element receives a segment of the path for NE itself. This can be done by= using PCEP as a transport protocol carrying either standard or proprietary extensions for services, with other extensions e.g. = draft-sivabalan-pce-lsp-setup-type-02.txt to = specify alternatives other than RSVP-TE for each NE.

 

I am in line with you = that there is no signaling with an NMS approach, and NMS for sure stores se= rvice information in some format. My question is if the above scenario or t= he similar is viewed as somewhat different from an NMS based approach.

 

And also the same ques= tion for the Openflow scenario Fatai raised.

 

Thanks.

Aihua

 

 

 

From: Fatai Zh= ang [mailto:zhangfatai@huawei.com]
Sent: Tuesday, September 16, 2014 5:45 AM
To: BELOTTI, SERGIO (SERGIO); Aihua Guo; Leeyoung
Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0

 

Hi Se= rgio and Aihua,

 = ;

I hav= e the same feeling as Sergio , ie, I am not sure what is “centralized= signaling”.

 = ;

Could= someone point out where we can find the term about “centralized sign= aling”?

 = ;

Let&#= 8217;s have some brainstorm by giving an example. For example, when a MPLS-= TE LSP is to be created by the Openflow controller, can we regard this &nbs= p;is “centralized signaling”?

 

 

 

 

Best Regards

 

Fatai

 = ;

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of BELOTTI, SERGIO (SERGIO)
Sent: Tuesday, September 16, 2014 12:32 AM
To: Aihua Guo; Leeyoung
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Aihua,<= /span>

 

could you kindly clari= fy for my knowledge what “PCEP extensions carrying service related in= formation” you’re referring to?

If you consider RFC 46= 55, I do not see any architecture hint that exclude distributed signaling a= s basic method to path setup in a PCE context.

On the other hand , th= e newly draft considering the possibility to use “other” path s= etup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is introducing a sp= ecifc TLV that you need to add if you want to use another method in your architecture. In fact , the default value proposed = for path Setup Type field is 0 , implicitly considering RSVP_TE as default =  setup method.

 

I have difficult to un= derstand what you mean with “service provisioning requests may be iss= ued from a centralized controller to all network elements vertically and in= parallel.”. What you mean with vertical and in parallel?

On the other hand I do= not see when an NMS does not carry service info, whether for service info = you consider the path setup info.

So I’m still unc= omfortable with the term “centralized signaling”  in this = context.

 

Thanks

Sergio

 

 

From: Aihua Guo [mailto:A= Guo@advaoptical.com]
Sent: sabato 13 settembre 2014 00:26
To: Leeyoung; BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0

 

Hi Sergio,=

 

Regarding your comment= ,

“There is no signaling in my view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

”

 

Today with e.g. PCEP e= xtensions carrying service related information, service provisioning reques= ts may be issued from a centralized controller to all network elements vert= ically and in parallel. This is IMHO one form of centralized signaling.

 

Service provisioning c= an be made through NMS, and NMS may or may not include service related info= rmation in the management protocols. Hence I still see a difference between= NMS based and centralized signaling. Would it be worth to reflect the difference in the wording with something = like this: ?

 

“A= llow for distributed signaling or centralized model (e.g.an NMS-based or ce= ntralized signaling) for set up….”

 

Thanks.

Aihua

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 3:23 PM
To: BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Sergio,

 

I am OK with your sugg= ested wording. Thanks.

 

Young

 

From: BELOTTI,= SERGIO (SERGIO) [mail= to:sergio.belotti@alcatel-lucent.com]
Sent: Friday, September 12, 2014 10:34 AM
To: Leeyoung
Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Young, Daniele

 

Please see in line .

 

Thanks

Sergio

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 12 settembre 2014 17:08
To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Daniele,

 

Thanks for providing y= our good comments here. Some of your comment (1) is for charter discussion = while the others (2 & 3) are architecture discussion. As a few folks ar= e already working on the architecture document, we may start a new email thread on architecture discussion while developin= g the draft.

 

Please see inline for = my response.

 

Regards,

Young

 

From: Daniele = Ceccarelli [mailto:danie= le.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@iet= f.org
Subject: RE: ACTN charter v1.0

 

Dhruv, Young,

 

Excellent progresses!<= /span>

Let me just add some n= otes/questions.

I’m collecting t= hem here and not inline as the reading of the whole thread is becoming pret= ty complex.

 

1.      On centralized signal= ing: We need to clearly state what centralized signaling means. NMS based i= s one of the possibilities but it’s not limited to NMS. A network imp= lementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here I’m not sure whethe= r we can speak about centralized signaling in both cases or not. In the cas= e of NMS we use the management plane to dynamically provision connectivity = (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plane or is something else= ? Please note that I speak about OF as it’s the only example that com= es to my mind but any other possibility can/must be considered.=

 

YOUNG>> The inte= ntion here was giving some overview of the tools that current transport net= works have. Of course thing are quickly changing with other initiatives lik= e OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps good compromis= e would be putting NMS based as an example. How about restating like:

 

Allow for distributed signaling or central= ized signaling (e.g., an NMS-based, etc.) for set up….”   

 

SB> I have still proble= ms with this definition. In my view when you think about to an NMS based pa= th setup, I have a centralized station that is providing command towards ma= naged equipment functions that are virtualized in a MIB , and these command provide the “resource reservation”= ; phase (not only but just to make the comparison with normal signaling pro= tocol) using a “vertical” management protocol .

There is no signaling in m= y view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

 

 

2.      On multidomain issues= : One question here: How do we want to manage multi-domain? I see two ways:=

a.      A coordinator of virt= ual network controllers – i.e. 1:1 relationship between virtual netwo= rk controller and physical network controller plus a coordinator of virtual= network controllers on top

b.      A coordinator of phys= ical network controllers – i.e. a coordinator of physical network con= trollers (1:N relationship between coordinator and PNCs) with a virtual net= work controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.

 

YOUNG>> These op= tions seem to be detailed architecture that the upcoming architecture docum= ent should address in detail. My personal opinion is that both architecture= s need to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial = baseline architecture.

 

3.      Again on multiodomain= : maybe we could improve the architecture draft saying what is centralized = and what is distributed. E.g. VPN prefixes exchange could be distributed (c= ontrollers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordinator asks= controller A to provision a path with domain A and asks controller B to pr= ovide a path within B so to have an end to end path crossing domains A and = B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

 

BR
Daniele

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

----------------= ------------

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”=

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.=

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-       Facilitate separ= ation of data plane and control plane,

-       Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-       High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-       Operator-driven use cases to address the following initial items= :

o   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o   Synchronization of network resources view across physical domain= controls and virtual network control.

o   Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-       Evaluation of Information model/data model to support the use ca= ses.

-       Requirements to support APIs/protocols, encoding languages, and = data models

-       Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-       Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

 

--_000_df57847874454fd9a249111a1e191456ATLSRVMBX1advaopticalco_-- From nobody Tue Sep 16 10:35:18 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ED8F81A0BEC for ; Tue, 16 Sep 2014 10:35:12 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BRCtPNs2tcgi for ; Tue, 16 Sep 2014 10:35:00 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 530F31A0B01 for ; Tue, 16 Sep 2014 10:34:59 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml403-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMR25281; Tue, 16 Sep 2014 17:34:56 +0000 (GMT) Received: from DFWEML704-CHM.china.huawei.com (10.193.5.141) by lhreml403-hub.china.huawei.com (10.201.5.217) with Microsoft SMTP Server (TLS) id 14.3.158.1; Tue, 16 Sep 2014 18:34:55 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml704-chm ([10.193.5.141]) with mapi id 14.03.0158.001; Tue, 16 Sep 2014 10:34:44 -0700 From: Leeyoung To: Aihua Guo , Fatai Zhang , "BELOTTI, SERGIO (SERGIO)" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAAl1QIAARW8QgAATiLCABG3V0IABJX+ggABgrwCAABfEMA== Date: Tue, 16 Sep 2014 17:34:43 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C36C9D@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <7AEB3D6833318045B4AE71C2C87E8E1729C2F30D@dfweml706-chm> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.47.137.196] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C36C9Ddfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/NkV-Vh6lkxGO4ucDA9mdHmJqNok Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Sep 2014 17:35:13 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C36C9Ddfweml706chm_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi, I think the issue is the term 'signaling' is used in two different context.= There is definitely RSVP-TE like signaling which is hop by hop from ingres= s to egress, which is 'horizontal'. That is what most folks are familiar wi= th and tend to understand signaling from that perspective. On the other han= d, there are several ways to set up path in a 'vertical' fashion. As Aihua = indicated, the centralized entity (e.g., PCE +, or SDN controller) can inde= ed invoke a path setup command to each NE along the path. This vertical ele= ment of path setup can be regarded as 'signaling' in a broader sense. Nonetheless, this portion of the charter statement is not really a central = issue. We are simply discussing some tools available for transport networks= . This is just a background information. So I suggest we move on with the l= atest resolution proposed by Sergio. Will this be agreeable? Thanks, Young From: Aihua Guo [mailto:AGuo@advaoptical.com] Sent: Tuesday, September 16, 2014 11:36 AM To: Fatai Zhang; BELOTTI, SERGIO (SERGIO); Leeyoung Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio and Fatai, What I consider for "centralized signaling" is in a scenario where there is= a centralized service controller and a network consisting of multiple netw= ork elements (NEs). In this scenario, the centralized service controller is= sues "vertical" path setup requests from the controller to all NEs at the s= ame time ("in parallel"). Each network element receives a segment of the pa= th for NE itself. This can be done by using PCEP as a transport protocol ca= rrying either standard or proprietary extensions for services, with other e= xtensions e.g. draft-sivabalan-pce-lsp-setup-type-02.txt to specify alterna= tives other than RSVP-TE for each NE. I am in line with you that there is no signaling with an NMS approach, and = NMS for sure stores service information in some format. My question is if t= he above scenario or the similar is viewed as somewhat different from an NM= S based approach. And also the same question for the Openflow scenario Fatai raised. Thanks. Aihua From: Fatai Zhang [mailto:zhangfatai@huawei.com] Sent: Tuesday, September 16, 2014 5:45 AM To: BELOTTI, SERGIO (SERGIO); Aihua Guo; Leeyoung Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio and Aihua, I have the same feeling as Sergio , ie, I am not sure what is "centralized = signaling". Could someone point out where we can find the term about "centralized signa= ling"? Let's have some brainstorm by giving an example. For example, when a MPLS-T= E LSP is to be created by the Openflow controller, can we regard this is "= centralized signaling"? Best Regards Fatai From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of BELOTTI, SERGIO (SER= GIO) Sent: Tuesday, September 16, 2014 12:32 AM To: Aihua Guo; Leeyoung Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Aihua, could you kindly clarify for my knowledge what "PCEP extensions carrying se= rvice related information" you're referring to? If you consider RFC 4655, I do not see any architecture hint that exclude d= istributed signaling as basic method to path setup in a PCE context. On the other hand , the newly draft considering the possibility to use "oth= er" path setup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is introd= ucing a specifc TLV that you need to add if you want to use another method = in your architecture. In fact , the default value proposed for path Setup T= ype field is 0 , implicitly considering RSVP_TE as default setup method. I have difficult to understand what you mean with "service provisioning req= uests may be issued from a centralized controller to all network elements v= ertically and in parallel.". What you mean with vertical and in parallel? On the other hand I do not see when an NMS does not carry service info, whe= ther for service info you consider the path setup info. So I'm still uncomfortable with the term "centralized signaling" in this c= ontext. Thanks Sergio From: Aihua Guo [mailto:AGuo@advaoptical.com] Sent: sabato 13 settembre 2014 00:26 To: Leeyoung; BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio, Regarding your comment, "There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." " Today with e.g. PCEP extensions carrying service related information, servi= ce provisioning requests may be issued from a centralized controller to all= network elements vertically and in parallel. This is IMHO one form of cent= ralized signaling. Service provisioning can be made through NMS, and NMS may or may not includ= e service related information in the management protocols. Hence I still se= e a difference between NMS based and centralized signaling. Would it be wor= th to reflect the difference in the wording with something like this: ? "Allow for distributed signaling or centralized model (e.g.an NMS-based or = centralized signaling) for set up...." Thanks. Aihua From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 3:23 PM To: BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Sergio, I am OK with your suggested wording. Thanks. Young From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com] Sent: Friday, September 12, 2014 10:34 AM To: Leeyoung Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Daniele Please see in line . Thanks Sergio From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: venerd=EC 12 settembre 2014 17:08 To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized= signaling means. NMS based is one of the possibilities but it's not limite= d to NMS. A network implementing e.g. Open Flow or any other similar protoc= ol should be considered as well IMHO. Here I'm not sure whether we can spea= k about centralized signaling in both cases or not. In the case of NMS we u= se the management plane to dynamically provision connectivity (whatever pro= tocol is used). In the case of e.g. Open Flow can we speak about management= plane or is something else? Please note that I speak about OF as it's the = only example that comes to my mind but any other possibility can/must be co= nsidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." SB> I have still problems with this definition. In my view when you think a= bout to an NMS based path setup, I have a centralized station that is provi= ding command towards managed equipment functions that are virtualized in a = MIB , and these command provide the "resource reservation" phase (not only = but just to make the comparison with normal signaling protocol) using a "ve= rtical" management protocol . There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." 2. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draf= t saying what is centralized and what is distributed. E.g. VPN prefixes exc= hange could be distributed (controllers speaking MP-BGP with each other) wh= ile provisioning could be hierarchical (i.e. the coordinator asks controlle= r A to provision a path with domain A and asks controller B to provide a pa= th within B so to have an end to end path crossing domains A and B)...H-PCE= like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C36C9Ddfweml706chm_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Hi,<= /p>

 

I think the issue is t= he term ‘signaling’ is used in two different context. There is = definitely RSVP-TE like signaling which is hop by hop from ingress to egres= s, which is ‘horizontal’. That is what most folks are familiar with and tend to understand signaling from that perspective. = On the other hand, there are several ways to set up path in a ‘vertic= al’ fashion. As Aihua indicated, the centralized entity (e.g., PCE &#= 43;, or SDN controller) can indeed invoke a path setup command to each NE along the path. This vertical element of path set= up can be regarded as ‘signaling’ in a broader sense.

 

Nonetheless, this port= ion of the charter statement is not really a central issue. We are simply d= iscussing some tools available for transport networks. This is just a backg= round information. So I suggest we move on with the latest resolution proposed by Sergio. Will this be agreeable?<= o:p>

 

Thanks,

Young

 

From: Aihua Gu= o [mailto:AGuo@advaoptical.com]
Sent: Tuesday, September 16, 2014 11:36 AM
To: Fatai Zhang; BELOTTI, SERGIO (SERGIO); Leeyoung
Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0<= o:p>

 

Hi Sergio and Fatai,

 

What I consider for &#= 8220;centralized signaling” is in a scenario where there is a central= ized service controller and a network consisting of multiple network elemen= ts (NEs). In this scenario, the centralized service controller issues “vertical” path setup requests from the cont= roller to all NEs at the same time (“in parallel”). Each networ= k element receives a segment of the path for NE itself. This can be done by= using PCEP as a transport protocol carrying either standard or proprietary extensions for services, with other extensions e.g. draft-s= ivabalan-pce-lsp-setup-type-02.txt to specify alternatives other than RSVP-= TE for each NE.

 

I am in line with you = that there is no signaling with an NMS approach, and NMS for sure stores se= rvice information in some format. My question is if the above scenario or t= he similar is viewed as somewhat different from an NMS based approach.

 

And also the same ques= tion for the Openflow scenario Fatai raised.

 

Thanks.

Aihua

 

 

 

From: Fatai Zh= ang [mailto:zhangfatai@huawei.com]
Sent: Tuesday, September 16, 2014 5:45 AM
To: BELOTTI, SERGIO (SERGIO); Aihua Guo; Leeyoung
Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0

 

Hi Se= rgio and Aihua,

 = ;

I hav= e the same feeling as Sergio , ie, I am not sure what is “centralized= signaling”.

 = ;

Could= someone point out where we can find the term about “centralized sign= aling”?

 = ;

Let&#= 8217;s have some brainstorm by giving an example. For example, when a MPLS-= TE LSP is to be created by the Openflow controller, can we regard this &nbs= p;is “centralized signaling”?

 

 

 

 

Best Regards

 

Fatai

 = ;

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of BELOTTI, SERGIO (SERGIO)
Sent: Tuesday, September 16, 2014 12:32 AM
To: Aihua Guo; Leeyoung
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Aihua,<= /span>

 

could you kindly clari= fy for my knowledge what “PCEP extensions carrying service related in= formation” you’re referring to?

If you consider RFC 46= 55, I do not see any architecture hint that exclude distributed signaling a= s basic method to path setup in a PCE context.

On the other hand , th= e newly draft considering the possibility to use “other” path s= etup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is introducing a sp= ecifc TLV that you need to add if you want to use another method in your architecture. In fact , the default value proposed = for path Setup Type field is 0 , implicitly considering RSVP_TE as default =  setup method.

 

I have difficult to un= derstand what you mean with “service provisioning requests may be iss= ued from a centralized controller to all network elements vertically and in= parallel.”. What you mean with vertical and in parallel?

On the other hand I do= not see when an NMS does not carry service info, whether for service info = you consider the path setup info.

So I’m still unc= omfortable with the term “centralized signaling”  in this = context.

 

Thanks

Sergio

 

 

From: Aihua Guo [mailto:A= Guo@advaoptical.com]
Sent: sabato 13 settembre 2014 00:26
To: Leeyoung; BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0

 

Hi Sergio,=

 

Regarding your comment= ,

“There is no signaling in my view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

”

 

Today with e.g. PCEP e= xtensions carrying service related information, service provisioning reques= ts may be issued from a centralized controller to all network elements vert= ically and in parallel. This is IMHO one form of centralized signaling.

 

Service provisioning c= an be made through NMS, and NMS may or may not include service related info= rmation in the management protocols. Hence I still see a difference between= NMS based and centralized signaling. Would it be worth to reflect the difference in the wording with something = like this: ?

 

“A= llow for distributed signaling or centralized model (e.g.an NMS-based or ce= ntralized signaling) for set up….”

 

Thanks.

Aihua

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 3:23 PM
To: BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Sergio,

 

I am OK with your sugg= ested wording. Thanks.

 

Young

 

From: BELOTTI,= SERGIO (SERGIO) [mail= to:sergio.belotti@alcatel-lucent.com]
Sent: Friday, September 12, 2014 10:34 AM
To: Leeyoung
Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Young, Daniele

 

Please see in line .

 

Thanks

Sergio

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 12 settembre 2014 17:08
To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Daniele,

 

Thanks for providing y= our good comments here. Some of your comment (1) is for charter discussion = while the others (2 & 3) are architecture discussion. As a few folks ar= e already working on the architecture document, we may start a new email thread on architecture discussion while developin= g the draft.

 

Please see inline for = my response.

 

Regards,

Young

 

From: Daniele = Ceccarelli [mailto:danie= le.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@iet= f.org
Subject: RE: ACTN charter v1.0

 

Dhruv, Young,

 

Excellent progresses!<= /span>

Let me just add some n= otes/questions.

I’m collecting t= hem here and not inline as the reading of the whole thread is becoming pret= ty complex.

 

1.      On centralized signal= ing: We need to clearly state what centralized signaling means. NMS based i= s one of the possibilities but it’s not limited to NMS. A network imp= lementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here I’m not sure whethe= r we can speak about centralized signaling in both cases or not. In the cas= e of NMS we use the management plane to dynamically provision connectivity = (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plane or is something else= ? Please note that I speak about OF as it’s the only example that com= es to my mind but any other possibility can/must be considered.=

 

YOUNG>> The inte= ntion here was giving some overview of the tools that current transport net= works have. Of course thing are quickly changing with other initiatives lik= e OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps good compromis= e would be putting NMS based as an example. How about restating like:

 

Allow for distributed signaling or central= ized signaling (e.g., an NMS-based, etc.) for set up….”   

 

SB> I have still proble= ms with this definition. In my view when you think about to an NMS based pa= th setup, I have a centralized station that is providing command towards ma= naged equipment functions that are virtualized in a MIB , and these command provide the “resource reservation”= ; phase (not only but just to make the comparison with normal signaling pro= tocol) using a “vertical” management protocol .

There is no signaling in m= y view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

 

 

2.      On multidomain issues= : One question here: How do we want to manage multi-domain? I see two ways:=

a.      A coordinator of virt= ual network controllers – i.e. 1:1 relationship between virtual netwo= rk controller and physical network controller plus a coordinator of virtual= network controllers on top

b.      A coordinator of phys= ical network controllers – i.e. a coordinator of physical network con= trollers (1:N relationship between coordinator and PNCs) with a virtual net= work controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.

 

YOUNG>> These op= tions seem to be detailed architecture that the upcoming architecture docum= ent should address in detail. My personal opinion is that both architecture= s need to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial = baseline architecture.

 

3.      Again on multiodomain= : maybe we could improve the architecture draft saying what is centralized = and what is distributed. E.g. VPN prefixes exchange could be distributed (c= ontrollers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordinator asks= controller A to provision a path with domain A and asks controller B to pr= ovide a path within B so to have an end to end path crossing domains A and = B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

 

BR
Daniele

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

----------------= ------------

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”=

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.=

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-       Facilitate separ= ation of data plane and control plane,

-       Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-       High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-       Operator-driven use cases to address the following initial items= :

o   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o   Synchronization of network resources view across physical domain= controls and virtual network control.

o   Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-       Evaluation of Information model/data model to support the use ca= ses.

-       Requirements to support APIs/protocols, encoding languages, and = data models

-       Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-       Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

 

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C36C9Ddfweml706chm_-- From nobody Tue Sep 16 10:57:35 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DD1A41A0BEA for ; Tue, 16 Sep 2014 10:57:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.551 X-Spam-Level: X-Spam-Status: No, score=-3.551 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RP_MATCHES_RCVD=-1.652] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Hsr6BncvM25f for ; Tue, 16 Sep 2014 10:57:20 -0700 (PDT) Received: from mail3.advaoptical.com (mail3.advaoptical.com [74.202.24.82]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 77E411A8702 for ; Tue, 16 Sep 2014 10:57:04 -0700 (PDT) Received: from atl-srv-mail10.atl.advaoptical.com (atl-srv-mail10.atl.advaoptical.com [172.16.5.39]) by atl-vs-fsmail.advaoptical.com (8.14.5/8.14.5) with ESMTP id s8GHurfa027395 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Tue, 16 Sep 2014 13:56:53 -0400 Received: from ATL-SRV-MBX2.advaoptical.com (172.16.5.46) by atl-srv-mail10.atl.advaoptical.com (172.16.5.39) with Microsoft SMTP Server (TLS) id 14.3.181.6; Tue, 16 Sep 2014 13:56:52 -0400 Received: from ATL-SRV-MBX1.advaoptical.com (172.16.5.45) by ATL-SRV-MBX2.advaoptical.com (172.16.5.46) with Microsoft SMTP Server (TLS) id 15.0.995.29; Tue, 16 Sep 2014 13:56:52 -0400 Received: from ATL-SRV-MBX1.advaoptical.com ([fe80::6433:f8f:ea41:a6e1]) by ATL-SRV-MBX1.advaoptical.com ([fe80::6433:f8f:ea41:a6e1%14]) with mapi id 15.00.0995.028; Tue, 16 Sep 2014 13:56:52 -0400 From: Aihua Guo To: Leeyoung , Fatai Zhang , "BELOTTI, SERGIO (SERGIO)" Thread-Topic: ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAAl1QIAARW8QgAATiLCABG3V0IABJX+ggABgrwCAABfEMIAAEVQQ Date: Tue, 16 Sep 2014 17:56:51 +0000 Message-ID: References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <7AEB3D6833318045B4AE71C2C87E8E1729C2F30D@dfweml706-chm> <7AEB3D6833318045B4AE71C2C87E8E1729C36C9D@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C36C9D@dfweml706-chm> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [172.16.5.49] Content-Type: multipart/alternative; boundary="_000_cdf3e6d29bb14c69befc53224f5648f0ATLSRVMBX1advaopticalco_" MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.12.52, 1.0.28, 0.0.0000 definitions=2014-09-16_06:2014-09-16,2014-09-16,1970-01-01 signatures=0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/rb7x9OnCAbsOHD5nTFBExx31aQM Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 16 Sep 2014 17:57:33 -0000 --_000_cdf3e6d29bb14c69befc53224f5648f0ATLSRVMBX1advaopticalco_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Agree. It's not a major topic and the clarification of signaling can be sou= ght separately. Aihua From: Leeyoung [mailto:leeyoung@huawei.com] Sent: Tuesday, September 16, 2014 1:35 PM To: Aihua Guo; Fatai Zhang; BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi, I think the issue is the term 'signaling' is used in two different context.= There is definitely RSVP-TE like signaling which is hop by hop from ingres= s to egress, which is 'horizontal'. That is what most folks are familiar wi= th and tend to understand signaling from that perspective. On the other han= d, there are several ways to set up path in a 'vertical' fashion. As Aihua = indicated, the centralized entity (e.g., PCE +, or SDN controller) can inde= ed invoke a path setup command to each NE along the path. This vertical ele= ment of path setup can be regarded as 'signaling' in a broader sense. Nonetheless, this portion of the charter statement is not really a central = issue. We are simply discussing some tools available for transport networks= . This is just a background information. So I suggest we move on with the l= atest resolution proposed by Sergio. Will this be agreeable? Thanks, Young From: Aihua Guo [mailto:AGuo@advaoptical.com] Sent: Tuesday, September 16, 2014 11:36 AM To: Fatai Zhang; BELOTTI, SERGIO (SERGIO); Leeyoung Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio and Fatai, What I consider for "centralized signaling" is in a scenario where there is= a centralized service controller and a network consisting of multiple netw= ork elements (NEs). In this scenario, the centralized service controller is= sues "vertical" path setup requests from the controller to all NEs at the s= ame time ("in parallel"). Each network element receives a segment of the pa= th for NE itself. This can be done by using PCEP as a transport protocol ca= rrying either standard or proprietary extensions for services, with other e= xtensions e.g. draft-sivabalan-pce-lsp-setup-type-02.txt to specify alterna= tives other than RSVP-TE for each NE. I am in line with you that there is no signaling with an NMS approach, and = NMS for sure stores service information in some format. My question is if t= he above scenario or the similar is viewed as somewhat different from an NM= S based approach. And also the same question for the Openflow scenario Fatai raised. Thanks. Aihua From: Fatai Zhang [mailto:zhangfatai@huawei.com] Sent: Tuesday, September 16, 2014 5:45 AM To: BELOTTI, SERGIO (SERGIO); Aihua Guo; Leeyoung Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio and Aihua, I have the same feeling as Sergio , ie, I am not sure what is "centralized = signaling". Could someone point out where we can find the term about "centralized signa= ling"? Let's have some brainstorm by giving an example. For example, when a MPLS-T= E LSP is to be created by the Openflow controller, can we regard this is "= centralized signaling"? Best Regards Fatai From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of BELOTTI, SERGIO (SER= GIO) Sent: Tuesday, September 16, 2014 12:32 AM To: Aihua Guo; Leeyoung Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Aihua, could you kindly clarify for my knowledge what "PCEP extensions carrying se= rvice related information" you're referring to? If you consider RFC 4655, I do not see any architecture hint that exclude d= istributed signaling as basic method to path setup in a PCE context. On the other hand , the newly draft considering the possibility to use "oth= er" path setup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is introd= ucing a specifc TLV that you need to add if you want to use another method = in your architecture. In fact , the default value proposed for path Setup T= ype field is 0 , implicitly considering RSVP_TE as default setup method. I have difficult to understand what you mean with "service provisioning req= uests may be issued from a centralized controller to all network elements v= ertically and in parallel.". What you mean with vertical and in parallel? On the other hand I do not see when an NMS does not carry service info, whe= ther for service info you consider the path setup info. So I'm still uncomfortable with the term "centralized signaling" in this c= ontext. Thanks Sergio From: Aihua Guo [mailto:AGuo@advaoptical.com] Sent: sabato 13 settembre 2014 00:26 To: Leeyoung; BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: RE: ACTN charter v1.0 Hi Sergio, Regarding your comment, "There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." " Today with e.g. PCEP extensions carrying service related information, servi= ce provisioning requests may be issued from a centralized controller to all= network elements vertically and in parallel. This is IMHO one form of cent= ralized signaling. Service provisioning can be made through NMS, and NMS may or may not includ= e service related information in the management protocols. Hence I still se= e a difference between NMS based and centralized signaling. Would it be wor= th to reflect the difference in the wording with something like this: ? "Allow for distributed signaling or centralized model (e.g.an NMS-based or = centralized signaling) for set up...." Thanks. Aihua From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 3:23 PM To: BELOTTI, SERGIO (SERGIO) Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 Hi Sergio, I am OK with your suggested wording. Thanks. Young From: BELOTTI, SERGIO (SERGIO) [mailto:sergio.belotti@alcatel-lucent.com] Sent: Friday, September 12, 2014 10:34 AM To: Leeyoung Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Daniele Please see in line . Thanks Sergio From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: venerd=EC 12 settembre 2014 17:08 To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, Thanks for providing your good comments here. Some of your comment (1) is f= or charter discussion while the others (2 & 3) are architecture discussion.= As a few folks are already working on the architecture document, we may st= art a new email thread on architecture discussion while developing the draf= t. Please see inline for my response. Regards, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Dhruv Dhody; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Dhruv, Young, Excellent progresses! Let me just add some notes/questions. I'm collecting them here and not inline as the reading of the whole thread = is becoming pretty complex. 1. On centralized signaling: We need to clearly state what centralized= signaling means. NMS based is one of the possibilities but it's not limite= d to NMS. A network implementing e.g. Open Flow or any other similar protoc= ol should be considered as well IMHO. Here I'm not sure whether we can spea= k about centralized signaling in both cases or not. In the case of NMS we u= se the management plane to dynamically provision connectivity (whatever pro= tocol is used). In the case of e.g. Open Flow can we speak about management= plane or is something else? Please note that I speak about OF as it's the = only example that comes to my mind but any other possibility can/must be co= nsidered. YOUNG>> The intention here was giving some overview of the tools that curre= nt transport networks have. Of course thing are quickly changing with other= initiatives like OF and even PCE based signaling in a research circle that= can be viewed as centralized signaling. Perhaps good compromise would be p= utting NMS based as an example. How about restating like: Allow for distributed signaling or centralized signaling (e.g., an NMS-base= d, etc.) for set up...." SB> I have still problems with this definition. In my view when you think a= bout to an NMS based path setup, I have a centralized station that is provi= ding command towards managed equipment functions that are virtualized in a = MIB , and these command provide the "resource reservation" phase (not only = but just to make the comparison with normal signaling protocol) using a "ve= rtical" management protocol . There is no signaling in my view . Another case is PCE: PCE is providing path computation phase , and can expl= oit on a distributed control plane to make a signaling of the setup calcula= ted. But again , it is not a centralized signaling , signaling is distribut= ed , it is the routing, if anything, that is centralized in my view. So I would suggest to delete the term signaling associated to centralized a= nd change the sentence into: "Allow for distributed signaling or centralized model (e.g.an NMS-based) fo= r set up...." 2. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. 3. Again on multiodomain: maybe we could improve the architecture draf= t saying what is centralized and what is distributed. E.g. VPN prefixes exc= hange could be distributed (controllers speaking MP-BGP with each other) wh= ile provisioning could be hierarchical (i.e. the coordinator asks controlle= r A to provision a path with domain A and asks controller B to provide a pa= th within B so to have an end to end path crossing domains A and B)...H-PCE= like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody Sent: venerd=EC 12 settembre 2014 04:33 To: Leeyoung; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Young, Please see inline.. From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. [Dhruv]: Yes that would be good with Eve suggestion and removing 'in the do= cument'/'of this draft'. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." [Dhruv]: That works! ---------------------------- * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. [Dhruv]: How about we reword this to - "The working group will determine if= new protocol or extensions to existing protocols are necessary. If the wor= king group determines they are necessary, then it will develop new protocol= s within the working group, on the other hand any extensions to existing pr= otocols would be done with interactions with other working groups where po= ssible." * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. [Dhruv]: Refer attachment, this format would help when we upload it to the = data tracker and charter diff tool can help track it better. This version has all the changes suggested by me and Eve. Regards, Dhruv Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_cdf3e6d29bb14c69befc53224f5648f0ATLSRVMBX1advaopticalco_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Agree. It’s not = a major topic and the clarification of signaling can be sought separately.

 

Aihua

 

From: Leeyoung= [mailto:leeyoung@huawei.com]
Sent: Tuesday, September 16, 2014 1:35 PM
To: Aihua Guo; Fatai Zhang; BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Ceccarelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0

 

Hi,<= /p>

 

I think the issue is t= he term ‘signaling’ is used in two different context. There is = definitely RSVP-TE like signaling which is hop by hop from ingress to egres= s, which is ‘horizontal’. That is what most folks are familiar with and tend to understand signaling from that perspective. = On the other hand, there are several ways to set up path in a ‘vertic= al’ fashion. As Aihua indicated, the centralized entity (e.g., PCE &#= 43;, or SDN controller) can indeed invoke a path setup command to each NE along the path. This vertical element of path set= up can be regarded as ‘signaling’ in a broader sense.

 

Nonetheless, this port= ion of the charter statement is not really a central issue. We are simply d= iscussing some tools available for transport networks. This is just a backg= round information. So I suggest we move on with the latest resolution proposed by Sergio. Will this be agreeable?<= o:p>

 

Thanks,

Young

 

From: Aihua Gu= o [mailto:AGuo@advaoptical.com]
Sent: Tuesday, September 16, 2014 11:36 AM
To: Fatai Zhang; BELOTTI, SERGIO (SERGIO); Leeyoung
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0<= o:p>

 

Hi Sergio and Fatai,

 

What I consider for &#= 8220;centralized signaling” is in a scenario where there is a central= ized service controller and a network consisting of multiple network elemen= ts (NEs). In this scenario, the centralized service controller issues “vertical” path setup requests from the cont= roller to all NEs at the same time (“in parallel”). Each networ= k element receives a segment of the path for NE itself. This can be done by= using PCEP as a transport protocol carrying either standard or proprietary extensions for services, with other extensions e.g. draft-s= ivabalan-pce-lsp-setup-type-02.txt to specify alternatives other than RSVP-= TE for each NE.

 

I am in line with you = that there is no signaling with an NMS approach, and NMS for sure stores se= rvice information in some format. My question is if the above scenario or t= he similar is viewed as somewhat different from an NMS based approach.

 

And also the same ques= tion for the Openflow scenario Fatai raised.

 

Thanks.

Aihua

 

 

 

 

Hi Se= rgio and Aihua,

 = ;

I hav= e the same feeling as Sergio , ie, I am not sure what is “centralized= signaling”.

 = ;

Could= someone point out where we can find the term about “centralized sign= aling”?

 = ;

Let&#= 8217;s have some brainstorm by giving an example. For example, when a MPLS-= TE LSP is to be created by the Openflow controller, can we regard this &nbs= p;is “centralized signaling”?

 

 

 

 

Best Regards

 

Fatai

 = ;

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of BELOTTI, SERGIO (SERGIO)
Sent: Tuesday, September 16, 2014 12:32 AM
To: Aihua Guo; Leeyoung
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Aihua,<= /span>

 

could you kindly clari= fy for my knowledge what “PCEP extensions carrying service related in= formation” you’re referring to?

If you consider RFC 46= 55, I do not see any architecture hint that exclude distributed signaling a= s basic method to path setup in a PCE context.

On the other hand , th= e newly draft considering the possibility to use “other” path s= etup method (draft-sivabalan-pce-lsp-setup-type-02.txt) is introducing a sp= ecifc TLV that you need to add if you want to use another method in your architecture. In fact , the default value proposed = for path Setup Type field is 0 , implicitly considering RSVP_TE as default =  setup method.

 

I have difficult to un= derstand what you mean with “service provisioning requests may be iss= ued from a centralized controller to all network elements vertically and in= parallel.”. What you mean with vertical and in parallel?

On the other hand I do= not see when an NMS does not carry service info, whether for service info = you consider the path setup info.

So I’m still unc= omfortable with the term “centralized signaling”  in this = context.

 

Thanks

Sergio

 

 

From: Aihua Guo [mailto:A= Guo@advaoptical.com]
Sent: sabato 13 settembre 2014 00:26
To: Leeyoung; BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: RE: ACTN charter v1.0

 

Hi Sergio,=

 

Regarding your comment= ,

“There is no signaling in my view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

”

 

Today with e.g. PCEP e= xtensions carrying service related information, service provisioning reques= ts may be issued from a centralized controller to all network elements vert= ically and in parallel. This is IMHO one form of centralized signaling.

 

Service provisioning c= an be made through NMS, and NMS may or may not include service related info= rmation in the management protocols. Hence I still see a difference between= NMS based and centralized signaling. Would it be worth to reflect the difference in the wording with something = like this: ?

 

“A= llow for distributed signaling or centralized model (e.g.an NMS-based or ce= ntralized signaling) for set up….”

 

Thanks.

Aihua

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 3:23 PM
To: BELOTTI, SERGIO (SERGIO)
Cc: actn@ietf.org; Daniele Cecc= arelli; Dhruv Dhody
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Sergio,

 

I am OK with your sugg= ested wording. Thanks.

 

Young

 

From: BELOTTI,= SERGIO (SERGIO) [mail= to:sergio.belotti@alcatel-lucent.com]
Sent: Friday, September 12, 2014 10:34 AM
To: Leeyoung
Cc: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Hi Young, Daniele

 

Please see in line .

 

Thanks

Sergio

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: venerd=EC 12 settembre 2014 17:08
To: Daniele Ceccarelli; Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Daniele,

 

Thanks for providing y= our good comments here. Some of your comment (1) is for charter discussion = while the others (2 & 3) are architecture discussion. As a few folks ar= e already working on the architecture document, we may start a new email thread on architecture discussion while developin= g the draft.

 

Please see inline for = my response.

 

Regards,

Young

 

From: Daniele = Ceccarelli [mailto:danie= le.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Dhruv Dhody; Leeyoung; actn@iet= f.org
Subject: RE: ACTN charter v1.0

 

Dhruv, Young,

 

Excellent progresses!<= /span>

Let me just add some n= otes/questions.

I’m collecting t= hem here and not inline as the reading of the whole thread is becoming pret= ty complex.

 

1.      On centralized signal= ing: We need to clearly state what centralized signaling means. NMS based i= s one of the possibilities but it’s not limited to NMS. A network imp= lementing e.g. Open Flow or any other similar protocol should be considered as well IMHO. Here I’m not sure whethe= r we can speak about centralized signaling in both cases or not. In the cas= e of NMS we use the management plane to dynamically provision connectivity = (whatever protocol is used). In the case of e.g. Open Flow can we speak about management plane or is something else= ? Please note that I speak about OF as it’s the only example that com= es to my mind but any other possibility can/must be considered.=

 

YOUNG>> The inte= ntion here was giving some overview of the tools that current transport net= works have. Of course thing are quickly changing with other initiatives lik= e OF and even PCE based signaling in a research circle that can be viewed as centralized signaling. Perhaps good compromis= e would be putting NMS based as an example. How about restating like:

 

Allow for distributed signaling or central= ized signaling (e.g., an NMS-based, etc.) for set up….”   

 

SB> I have still proble= ms with this definition. In my view when you think about to an NMS based pa= th setup, I have a centralized station that is providing command towards ma= naged equipment functions that are virtualized in a MIB , and these command provide the “resource reservation”= ; phase (not only but just to make the comparison with normal signaling pro= tocol) using a “vertical” management protocol .

There is no signaling in m= y view .

Another case is PCE: PCE i= s providing path computation phase , and can exploit on a distributed contr= ol plane to make a signaling of the setup calculated. But again , it is not= a centralized signaling , signaling is distributed , it is the routing, if anything,  that is centralized= in my view.

 

So I would suggest to dele= te the term signaling associated to centralized and change the sentence int= o:

“A= llow for distributed signaling or centralized model (e.g.an NMS-based) for = set up….”

 

 

2.      On multidomain issues= : One question here: How do we want to manage multi-domain? I see two ways:=

a.      A coordinator of virt= ual network controllers – i.e. 1:1 relationship between virtual netwo= rk controller and physical network controller plus a coordinator of virtual= network controllers on top

b.      A coordinator of phys= ical network controllers – i.e. a coordinator of physical network con= trollers (1:N relationship between coordinator and PNCs) with a virtual net= work controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.

 

YOUNG>> These op= tions seem to be detailed architecture that the upcoming architecture docum= ent should address in detail. My personal opinion is that both architecture= s need to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial = baseline architecture.

 

3.      Again on multiodomain= : maybe we could improve the architecture draft saying what is centralized = and what is distributed. E.g. VPN prefixes exchange could be distributed (c= ontrollers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the coordinator asks= controller A to provision a path with domain A and asks controller B to pr= ovide a path within B so to have an end to end path crossing domains A and = B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

 

BR
Daniele

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Dhruv Dhody
Sent: venerd=EC 12 settembre 2014 04:33
To: Leeyoung; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Young,

 

Please see inline..

 

From: Dhruv Dh= ody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments on the proposed = charter.

 

* Do we need some text in charter also to = specify what we consider as Transport networks?

 

YOUNG>> That may clarify the scope. = Do you have any suggestion?  One definition from the Problem Statement= draft (https://datatracker.ietf.org/doc/draft-leeking-actn-problem= -statement/) is as follows. Would this be good enough or need more work?

 

Transport networks are= defined as network infrastructure that

   provides = connectivity and bandwidth for customer services. They

   are chara= cterized by their ability to support server layer

   prov= isioning and traffic engineering for client layer services,

   such= that resource guarantees may be provided to their customers.

   Transport= networks in this document refer to a set of different

   type of c= onnection-oriented networks, which include Connection-

   Oriented = Circuit Switched (CO-CS) networks and Connection-

   Oriented = Packet Switched (CO-PS) networks. This implies that at

   leas= t the following transport networks are in scope of the

   discussio= n of this draft: Layer 1 (L1) optical networks (e.g.,

   Opti= cal Transport Networks (OTN) and Wavelength Switched Optical

   Netw= orks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging

   network t= echnologies with connection-oriented behavior.

 

 

[Dhruv]: Yes= that would be good with Eve suggestion and removing ‘in the document= ’/’of this draft’.

 

 

* “Transport networks have a variety= of mechanisms to:

-       = ;        Facilitate separation of data p= lane and control plane,

-       = ;        Allow for distributed or centra= lized signaling  for path setup and protection, and

-       = ;        Provide traffic engineering mec= hanism via centralized path computation.”

 

Term ‘centralized signaling’ i= s confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can reword the secon= d point: “Allow for distributed signaling or an NMS-based centralized= signaling for set up….”

 

[Dhruv]: That works!

----------------= ------------

 

* “The architecture work will lead t= o requirements for information models and protocol extensions between the v= irtual network controller and the physical network domain controllers and between the virtual network controller and multi-tenant customer contr= ollers.”

 

It would be nice to add “multi-domai= n coordinator” with “virtual network controller” to expli= citly link them together. Also multi-tenant customer controllers doesn̵= 7;t convey the intention to have different customer controllers for each tenant, how = about…

 

“The architecture work will lead to = requirements for information models and protocol extensions between the vir= tual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the virtual networ= k controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds good to me. Than= ks.

 

* “The working group will determine = if new protocol extensions are necessary. If the working group determines t= hey are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other working gr= oups to enhance existing protocols where possible.”=

 

Suggest to re-word this as it’s not = clear – is it about extension to existing protocols or new protocol a= nd where that work might be taken up. Also Protocol extensions is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol extensions mean= a brand new protocol (say, “ACTN” protocol per se) that cannot= be extended from existing protocols. But there may be some areas where we need to expand from existing protocols. In such case, we need to interact = with the corresponding WGs. Perhaps an analogy would be that CCAMP WG is ch= artered to work on OPSF-TE for specific technologies while OSPF WG needs to= be informed of the protocol changes.

 

[Dhruv]: How about we reword this to ̵= 1; “The working group will determine if new protocol or extensions to= existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group= , on the other hand any extensions to existing protocols would be done = ; with interactions with other working groups where possible.”=

 

* You may w= ant to do charter text formatting in RFC text format taking care of word-wr= aps and indentation

YOUNG>&g= t; Not sure what you meant here. Please clarify it for me.

[Dhruv]: Re= fer attachment, this format would help when we upload it to the data tracke= r and charter diff tool can help track it better.  <= /p>

This versio= n has all the changes suggested by me and Eve.

Regards,

Dhruv

Hope you find them useful in making the ch= arter text crisp.

 

YOUNG>> Definitely. Thanks a lot for= your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, I forgot the Su= bject of this email. Here’s a retransmission with the subject.=

 

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a good one. =

 

We’d like to give you some updates and plans o= n the ACTN work. We are going to request a formal BoF in Honolulu IETF meet= ing. In doing so, we need a charter draft as part of the due diligence. Her= e’s an initial charter draft developed by the small set of proponents of the work based on the discussions and use-c= ases and other published documents.  We hope this captures a workable = ACTN scope.  This version 1.0 draft charter is also posted in the wiki= : https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be greatly appreciated = to come up with a good charter developed by the community of interest. &nbs= p;

 

Best regards,

Young (on behalf of the proponents)

 

-------------------------------draft charter 1.0 ---= ---------------------------------------------------------------------------= ----------------------

 

Transport networks have a variety of mechanisms to:

-       Facilitate separ= ation of data plane and control plane,

-       Allow for distri= buted or centralized signaling  for path setup and protection, and

-       Provide traffic = engineering mechanism via centralized path computation.

 

These represent key technologies for enabling flexible = and dynamic networking, and efficient control and recovery of resources. Although these technologies prov= ide significant benefits within a single domain control boundary, they do n= ot meet the growing need for transport network virtualization in multi-doma= in transport networks. More and more network operators are building and operating on multi-domain transport net= works. These domains (collections of links and nodes) may be each of a diff= erent technology, administrative zones, or vendor-specific islands. Establi= shment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of = both operational concerns (control plane and management plane) and interope= rability issues (control plane and data plane).  Due to these issues, = new services that require connections that traverse multiple domains need significant planning and often manual = operations to interface different vendor equipment and technology.

 

The aim of Abstraction and Control of Transport Networks (AC= TN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and c= ontrol multi-subnet, multi-technology, multi-vendor domain networks. Abstra= ction of transport networks also allows operators to consolidate their netw= ork services into multi-tenant virtual transport networks. This will enable rapid service deployment of new dynam= ic and elastic services, and will improve overall network operations and sc= aling of existing services. Discussion with operators has also highlighted = a need for virtual network operation based on the abstraction of underlying technology and vendor domains.

 

Multi-domain network coordination function in ACTN is built = on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.

 

The ACTN working group will work to develop a high-level = architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenan= t customers (primarily internal service organizations with respect to a net= work operator), the virtual network control and the physical network domain= controls as well as a horizontal E2E service coordination across multi-domain networks. It will identify ke= y building components and the corresponding interfaces among these componen= ts.  The architecture work will lead to requirements for information models and protocol extensions between the vi= rtual network controller and the physical network domain controllers= and between the virtual netwo= rk controller and multi-tenant customer controllers. Well-defined use cases from operators pe= rspective with clearly stated need for transport network virtualization are= critical in scoping the work and thus to achieve the deliverables of the working group.

 

The working group will work on the following = items:

-       High-level architecture that describes the basic building blocks= to enable transport network virtualization to support use cases.

-       Operator-driven use cases to address the following initial items= :

o   Virtual network control and operation for core transport Packet = Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON)

o   Virtual network control and operation for mobile backhaul multi-= technology transport (e.g., MPLS-TP and MPLS/OTN)

o   Data Center Operator’s interconnection with optical transp= ort network infrastructure providers to support dynamic virtual circuit services.

o   Multi-tenant support to allow virtual network information query,= virtual network negotiation, creation/deletion and modification.

o   Synchronization of network resources view across physical domain= controls and virtual network control.

o   Dyna= mic service control and monitoring across all entities.

<= span lang=3D"EN-GB" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif";color:black">Initial work within t= he working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-       Evaluation of Information model/data model to support the use ca= ses.

-       Requirements to support APIs/protocols, encoding languages, and = data models

-       Gap analysis of existing IETF and other protocols, encoding lang= uages and data models to fulfill the requirements.

-       Protocol extensions (if necessary after re-chartering).

 

The working group will determine if new proto= col extensions are necessary. If the working group determines they are necessary, then it will develop the new protocols within the work= ing group where necessary, while interacting with other working groups to e= nhance existing protocols where possible.

 

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif""> 

 

--_000_cdf3e6d29bb14c69befc53224f5648f0ATLSRVMBX1advaopticalco_-- From nobody Wed Sep 17 11:42:10 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B82301A0894 for ; Wed, 17 Sep 2014 11:41:58 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.851 X-Spam-Level: X-Spam-Status: No, score=-4.851 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-1.652, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0SWbo5BF9tnD for ; Wed, 17 Sep 2014 11:41:49 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 12E181A0432 for ; Wed, 17 Sep 2014 11:41:47 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml401-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMS37726; Wed, 17 Sep 2014 18:41:43 +0000 (GMT) Received: from DFWEML705-CHM.china.huawei.com (10.193.5.142) by lhreml401-hub.china.huawei.com (10.201.5.240) with Microsoft SMTP Server (TLS) id 14.3.158.1; Wed, 17 Sep 2014 19:41:40 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml705-chm ([10.193.5.142]) with mapi id 14.03.0158.001; Wed, 17 Sep 2014 11:41:25 -0700 From: Leeyoung To: "King, Daniel" , "Y. Richard Yang" Thread-Topic: [Actn] ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAP39AIAEc34AgAKX3BA= Date: Wed, 17 Sep 2014 18:41:24 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C3735B@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <65174429B5AF4C45BD0798810EC48E0A3236576C@EX-0-MB2.lancs.local> In-Reply-To: <65174429B5AF4C45BD0798810EC48E0A3236576C@EX-0-MB2.lancs.local> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.47.130.55] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C3735Bdfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/EQ7rC6bk4Rz-K3lQFrZrI0yw-TI Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Sep 2014 18:41:59 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C3735Bdfweml706chm_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 SGkgUmljaGFyZCwNCg0KVGhhbmtzIGZvciBncmVhdCBjb21tZW50cy4gSSB0aGluayBEYW4gcHJv dmlkZWQgZ29vZCByZXNwb25zZXMgdG8geW91ciBjb21tZW50LiBQbGVhc2Ugc2VlIGJlbG93IGZv ciBmdXJ0aGVyIGNsYXJpZmljYXRpb25zIG9uIHNvbWUgb2YgeW91ciBjb21tZW50cy4NCg0KLSBU aGUgY3VycmVudCB2ZXJzaW9uIGFwcGVhcnMgdG8gdHJ5aW5nIHRvIGRvIGJvdGggKDEpIGltcG9z 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HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id St7jomm1Rr22 for ; Wed, 17 Sep 2014 15:58:53 -0700 (PDT) Received: from sideburn.lancs.ac.uk (sideburn.lancs.ac.uk [148.88.17.22]) by ietfa.amsl.com (Postfix) with ESMTP id 6104D1A0AF6 for ; Wed, 17 Sep 2014 15:58:52 -0700 (PDT) Received: from ex-1-ht0.lancs.ac.uk ([10.42.18.57] helo=EX-1-HT0.lancs.local) by sideburn.lancs.ac.uk with esmtp (Exim 4.72) (envelope-from ) id 1XUOBU-0000W8-Eg; Wed, 17 Sep 2014 23:58:48 +0100 Received: from EX-0-MB2.lancs.local ([fe80::9d98:936b:54d1:c531]) by EX-1-HT0.lancs.local ([fe80::d9e8:ad10:d075:a6b6%12]) with mapi id 14.03.0174.001; Wed, 17 Sep 2014 23:58:47 +0100 From: "King, Daniel" To: Leeyoung , "Y. Richard Yang" Thread-Topic: [Actn] ACTN charter v1.0 Thread-Index: AQFbR/5w7MfuzrVmHnf/H0kLPTq/RAMiIzy9Acbw7dkB3Bxe8wHQfWyGAg1HGgwCEotQDZyF5bgAgAMbewCAAE7dUA== Date: Wed, 17 Sep 2014 22:58:47 +0000 Message-ID: <65174429B5AF4C45BD0798810EC48E0A3236609A@EX-0-MB2.lancs.local> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <65174429B5AF4C45BD0798810EC48E0A3236576C@EX-0-MB2.lancs.local> <7AEB3D6833318045B4AE71C2C87E8E1729C3735B@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C3735B@dfweml706-chm> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [176.227.128.84] x-iss-local-domain: 1 Content-Type: multipart/alternative; boundary="_000_65174429B5AF4C45BD0798810EC48E0A3236609AEX0MB2lancsloca_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/-8vvZ5_TYu7fRlBGgljBdtoOji8 Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 17 Sep 2014 22:59:00 -0000 --_000_65174429B5AF4C45BD0798810EC48E0A3236609AEX0MB2lancsloca_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 SGkgWW91bmcgYW5kIFJpY2hhcmQsDQoNCkp1c3QgdG8gYmUgY2xlYXIgdGhlbiwgdGhlIGRlZmlu aXRpb24gZm9yIGFuIOKAnG92ZXJsYXkgbmV0d29ya+KAnSBpcyBhcyBmb2xsb3dzOg0KDQogICBP dmVybGF5IE5ldHdvcms6IEFuIG92ZXJsYXkgbmV0d29yayBydW5zIGluZGVwZW5kZW50bHkgb24g 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[127.0.0.1]) (amavisd-new, port 10024) with ESMTP id lqxw7AeYa_GZ for ; Thu, 18 Sep 2014 14:28:21 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 35D061A6EFB for ; Thu, 18 Sep 2014 14:28:20 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml404-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BMT51913; Thu, 18 Sep 2014 21:28:16 +0000 (GMT) Received: from DFWEML704-CHM.china.huawei.com (10.193.5.141) by lhreml404-hub.china.huawei.com (10.201.5.218) with Microsoft SMTP Server (TLS) id 14.3.158.1; Thu, 18 Sep 2014 22:28:15 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml704-chm ([10.193.5.141]) with mapi id 14.03.0158.001; Thu, 18 Sep 2014 14:27:57 -0700 From: Leeyoung To: "King, Daniel" , "Y. Richard Yang" Thread-Topic: [Actn] ACTN charter v1.0 Thread-Index: AQHPzHABi4JicJmp00eRKwglXOBTVZv7K+VwgADbR+CAALlkwIAAuZBQgAAbLuCAAP39AIAEc34AgAKX3BCAANOzgIAA/yWg Date: Thu, 18 Sep 2014 21:27:56 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C37611@dfweml706-chm> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <65174429B5AF4C45BD0798810EC48E0A3236576C@EX-0-MB2.lancs.local> <7AEB3D6833318045B4AE71C2C87E8E1729C3735B@dfweml706-chm> <65174429B5AF4C45BD0798810EC48E0A3236609A@EX-0-MB2.lancs.local> In-Reply-To: <65174429B5AF4C45BD0798810EC48E0A3236609A@EX-0-MB2.lancs.local> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.47.140.156] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C37611dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/pvFf37iGJ5MiJ5lVPRapysTj3ZQ Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Sep 2014 21:28:28 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C37611dfweml706chm_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 SGkgRGFuLA0KDQpUaGFua3MuIEkgdGhpbmsgd2UgbmVlZCB0byBiZSBhd2FyZSBvZiB0aGUgY29u dGV4dCB0byB3aGljaCBvdmVybGF5IG5ldHdvcmsgYXBwbGllcy4gWW91ciBzdWdnZXN0ZWQgZGVm 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(10.201.5.218) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 19 Sep 2014 02:17:19 +0100 Received: from SZXEMA504-MBX.china.huawei.com ([169.254.7.19]) by SZXEMA401-HUB.china.huawei.com ([10.82.72.33]) with mapi id 14.03.0158.001; Fri, 19 Sep 2014 09:17:09 +0800 From: Zhenghaomian To: Leeyoung , "King, Daniel" , "Y. Richard Yang" Thread-Topic: [Actn] ACTN charter v1.0 Thread-Index: AQHP04eF29AD5T6HuE2uetIrIDSrcpwHpaRg Date: Fri, 19 Sep 2014 01:17:09 +0000 Message-ID: References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <65174429B5AF4C45BD0798810EC48E0A3236576C@EX-0-MB2.lancs.local> <7AEB3D6833318045B4AE71C2C87E8E1729C3735B@dfweml706-chm> <65174429B5AF4C45BD0798810EC48E0A3236609A@EX-0-MB2.lancs.local> <7AEB3D6833318045B4AE71C2C87E8E1729C37611@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C37611@dfweml706-chm> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.66.53.113] 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NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jgn09YRDEoF0 for ; Fri, 19 Sep 2014 01:34:53 -0700 (PDT) Received: from sideburn.lancs.ac.uk (sideburn.lancs.ac.uk [148.88.17.22]) by ietfa.amsl.com (Postfix) with ESMTP id 886DD1A000A for ; Fri, 19 Sep 2014 01:34:50 -0700 (PDT) Received: from ex-1-ht0.lancs.ac.uk ([10.42.18.57] helo=EX-1-HT0.lancs.local) by sideburn.lancs.ac.uk with esmtp (Exim 4.72) (envelope-from ) id 1XUteQ-0004Kb-9w; Fri, 19 Sep 2014 09:34:46 +0100 Received: from EX-0-MB2.lancs.local ([fe80::9d98:936b:54d1:c531]) by EX-1-HT0.lancs.local ([fe80::d9e8:ad10:d075:a6b6%12]) with mapi id 14.03.0174.001; Fri, 19 Sep 2014 09:34:45 +0100 From: "King, Daniel" To: Leeyoung , "Y. Richard Yang" Thread-Topic: [Actn] ACTN charter v1.0 Thread-Index: AQFbR/5w7MfuzrVmHnf/H0kLPTq/RAMiIzy9Acbw7dkB3Bxe8wHQfWyGAg1HGgwCEotQDQFmjABrAURVcAYCqgXz8QHrITninFGB3aA= Date: Fri, 19 Sep 2014 08:34:45 +0000 Message-ID: <65174429B5AF4C45BD0798810EC48E0A32366C08@EX-0-MB2.lancs.local> References: <7AEB3D6833318045B4AE71C2C87E8E1729C2E202@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DED8C@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C2ECCB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865DF376@szxeml556-mbs.china.huawei.com> <4A1562797D64E44993C5CBF38CF1BE481276003B@ESESSMB301.ericsson.se> <7AEB3D6833318045B4AE71C2C87E8E1729C2F12A@dfweml706-chm> <65174429B5AF4C45BD0798810EC48E0A3236576C@EX-0-MB2.lancs.local> <7AEB3D6833318045B4AE71C2C87E8E1729C3735B@dfweml706-chm> <65174429B5AF4C45BD0798810EC48E0A3236609A@EX-0-MB2.lancs.local> <7AEB3D6833318045B4AE71C2C87E8E1729C37611@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C37611@dfweml706-chm> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [176.227.128.84] x-iss-local-domain: 1 Content-Type: multipart/alternative; boundary="_000_65174429B5AF4C45BD0798810EC48E0A32366C08EX0MB2lancsloca_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/pcymLVAWbeEJm4Wd9Q1j9YsYtRo Cc: "actn@ietf.org" , Daniele Ceccarelli , Dhruv Dhody Subject: Re: [Actn] ACTN charter v1.0 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Sep 2014 08:35:00 -0000 --_000_65174429B5AF4C45BD0798810EC48E0A32366C08EX0MB2lancsloca_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 R3JlYXQsIHdlIGFncmVlLiBPYnZpb3VzbHkgQUNUTiBpcyBmaXJtbHkgcm9vdGVkIGluIHRoZSB0 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ESMTP id 1E1FB1A0104 for ; Fri, 19 Sep 2014 08:27:43 -0700 (PDT) Received: from ex-0-ht0.lancs.ac.uk ([10.42.18.47] helo=EX-0-HT0.lancs.local) by sideburn.lancs.ac.uk with esmtp (Exim 4.72) (envelope-from ) id 1XV062-0004Yi-5h; Fri, 19 Sep 2014 16:27:42 +0100 Received: from EX-0-MB2.lancs.local ([fe80::9d98:936b:54d1:c531]) by EX-0-HT0.lancs.local ([fe80::7d10:114a:53b0:7f2f%12]) with mapi id 14.03.0174.001; Fri, 19 Sep 2014 16:27:40 +0100 From: "King, Daniel" To: "actn@ietf.org" Thread-Topic: ACTN charter v1.1 (and previous versions) Thread-Index: Ac/UHgniIgeLYy9mRGOJyuD4pHxRig== Date: Fri, 19 Sep 2014 15:27:40 +0000 Message-ID: <65174429B5AF4C45BD0798810EC48E0A32366FCB@EX-0-MB2.lancs.local> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [176.227.128.84] x-iss-local-domain: 1 Content-Type: multipart/alternative; boundary="_000_65174429B5AF4C45BD0798810EC48E0A32366FCBEX0MB2lancsloca_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/GdYpLd3XJ_OEDQOWZmXiTGOMk2c Cc: Leeyoung Subject: Re: [Actn] ACTN charter v1.1 (and previous versions) X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Sep 2014 15:27:50 -0000 --_000_65174429B5AF4C45BD0798810EC48E0A32366FCBEX0MB2lancsloca_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable All, the latest version (1.1) is now available on the Wiki: https://sites.google.com/site/actnbof/home/charter-proposal Br, Dan. From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 12 September 2014 22:25 To: actn@ietf.org Subject: [Actn] ACTN charter v1.1 Hi, We have had pretty good discussions on ACTN charter 1.0. Thanks to all who = provided good comments and suggestions. At the close of the week, I had chance to update the charter (v1.1) based o= n agree-upon discussion points (there are still some unresolved points). Here's the output. Please refer to this version for any subsequent discussi= ons. Also attached is the Word document that shows the diff marks. I may ha= ve missed some points you raised. Please raise them again if that is the ca= se. Thanks & have a good weekend! Young From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Friday, September 12, 2014 2:01 PM To: Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Daniele, I think Segment Routing is a TE technique that can improve MPLS-TE networks= , but not sure if it in itself is a connection-oriented technologies. From = a signaling standpoint, it may be regarded as a derivative of MPLS-TE. Plea= se correct if I am wrong. Thanks, Young From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com] Sent: Friday, September 12, 2014 9:27 AM To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org Subject: RE: ACTN charter v1.0 Good catch Eve, Could we include also segment routing into the list of connection oriented = technologies? I don't know whether it could be considered as part of the MP= LS-TE or not (don't think so). BR Daniele From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve) Sent: gioved=EC 11 settembre 2014 18:09 To: Leeyoung; Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi, Just a quick terminology comment - the wording below infers OTN is only L1,= when it is both L1 and L0 :) So I would suggest to reword as "This implie= s that at least the following transport networks are in scope of the discus= sion of this draft: Layer 1 (L1) and Layer 0 (L0) optical networks (e.g., O= TN ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other emerging network tech= nologies with connection-oriented behavior". Best regards, Eve From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: Thursday, September 11, 2014 11:17 AM To: Dhruv Dhody; actn@ietf.org Subject: Re: [Actn] ACTN charter v1.0 Hi Dhruv, Thanks for providing your valuable comment. Please see inline for my response. Thanks. Young From: Dhruv Dhody Sent: Wednesday, September 10, 2014 10:48 PM To: Leeyoung; Leeyoung; actn@ietf.org Subject: RE: ACTN charter v1.0 Hi Young, Please find some comments on the proposed charter. * Do we need some text in charter also to specify what we consider as Trans= port networks? YOUNG>> That may clarify the scope. Do you have any suggestion? One defini= tion from the Problem Statement draft (https://datatracker.ietf.org/doc/dra= ft-leeking-actn-problem-statement/) is as follows. Would this be good enoug= h or need more work? Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks in this document refer to a set of different type of connection-oriented networks, which include Connection- Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (L1) optical networks (e.g., Optical Transport Networks (OTN) and Wavelength Switched Optical Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. * "Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path se= tup and protection, and - Provide traffic engineering mechanism via centralized path = computation." Term 'centralized signaling' is confusing to me, do you mean, the use of NM= S? YOUNG>> Yes. We can reword the second point: "Allow for distributed signali= ng or an NMS-based centralized signaling for set up...." * "The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers." It would be nice to add "multi-domain coordinator" with "virtual network co= ntroller" to explicitly link them together. Also multi-tenant customer cont= rollers doesn't convey the intention to have different customer controllers= for each tenant, how about... "The architecture work will lead to requirements for information models and= protocol extensions between the virtual network controller (embedded in a = multi-domain coordinator) and the physical network domain controllers and b= etween the virtual network controller and multiple tenant customer controll= ers." YOUNG>> This sounds good to me. Thanks. * "The working group will determine if new protocol extensions are necessar= y. If the working group determines they are necessary, then it will develop= the new protocols within the working group where necessary, while interact= ing with other working groups to enhance existing protocols where possible.= " Suggest to re-word this as it's not clear - is it about extension to existi= ng protocols or new protocol and where that work might be taken up. Also Pr= otocol extensions is mentioned as a work item after re-chartering. YOUNG>> New protocol extensions mean a brand new protocol (say, "ACTN" prot= ocol per se) that cannot be extended from existing protocols. But there may= be some areas where we need to expand from existing protocols. In such cas= e, we need to interact with the corresponding WGs. Perhaps an analogy would= be that CCAMP WG is chartered to work on OPSF-TE for specific technologies= while OSPF WG needs to be informed of the protocol changes. * You may want to do charter text formatting in RFC text format taking care= of word-wraps and indentation YOUNG>> Not sure what you meant here. Please clarify it for me. Hope you find them useful in making the charter text crisp. YOUNG>> Definitely. Thanks a lot for your review and great comments. Dhruv From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung Sent: 10 September 2014 04:53 To: Leeyoung; actn@ietf.org Subject: [Actn] ACTN charter v1.0 Sorry, I forgot the Subject of this email. Here's a retransmission with the= subject. From: Leeyoung Sent: Tuesday, September 09, 2014 3:47 PM To: actn@ietf.org Subject: Hi, I hope your summer break was a good one. We'd like to give you some updates and plans on the ACTN work. We are going= to request a formal BoF in Honolulu IETF meeting. In doing so, we need a c= harter draft as part of the due diligence. Here's an initial charter draft = developed by the small set of proponents of the work based on the discussio= ns and use-cases and other published documents. We hope this captures a wo= rkable ACTN scope. This version 1.0 draft charter is also posted in the wi= ki: https://sites.google.com/site/actnbof/home/charter-propor Your review and comment will be greatly appreciated to come up with a good = charter developed by the community of interest. Best regards, Young (on behalf of the proponents) -------------------------------draft charter 1.0 --------------------------= -------------------------------------------------------------------------- Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed or centralized signaling for path setup and = protection, and - Provide traffic engineering mechanism via centralized path computat= ion. These represent key technologies for enabling flexible and dynamic networki= ng, and efficient control and recovery of resources. Although these technol= ogies provide significant benefits within a single domain control boundary,= they do not meet the growing need for transport network virtualization in = multi-domain transport networks. More and more network operators are buildi= ng and operating on multi-domain transport networks. These domains (collect= ions of links and nodes) may be each of a different technology, administrat= ive zones, or vendor-specific islands. Establishment of end-to-end connecti= ons spanning multiple domains is a perpetual problem for operators because = of both operational concerns (control plane and management plane) and inter= operability issues (control plane and data plane). Due to these issues, ne= w services that require connections that traverse multiple domains need sig= nificant planning and often manual operations to interface different vendor= equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facil= itate a centralized virtual network operation: the creation of a virtualize= d environment allowing operators to view and control multi-subnet, multi-te= chnology, multi-vendor domain networks. Abstraction of transport networks a= lso allows operators to consolidate their network services into multi-tenan= t virtual transport networks. This will enable rapid service deployment of = new dynamic and elastic services, and will improve overall network operatio= ns and scaling of existing services. Discussion with operators has also hig= hlighted a need for virtual network operation based on the abstraction of u= nderlying technology and vendor domains. Multi-domain network coordination function in ACTN is built on a control hi= erarchy where a multi-domain coordinator interacts with each domain control= ler (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) for abstractin= g network resource information to provide virtual network control functions= . This virtual network control functions are embedded in a multi-domain net= work coordinator to support various services/clients/applications to create= and manage their own virtual networks that share the common transport netw= ork resources. The ACTN working group will work to develop a high-level architecture for t= ransport network abstraction and control that facilitates seamless vertical= service coordination across multi-tenant customers (primarily internal ser= vice organizations with respect to a network operator), the virtual network= control and the physical network domain controls as well as a horizontal E= 2E service coordination across multi-domain networks. It will identify key = building components and the corresponding interfaces among these components= . The architecture work will lead to requirements for information models a= nd protocol extensions between the virtual network controller and the physi= cal network domain controllers and between the virtual network controller a= nd multi-tenant customer controllers. Well-defined use cases from operators= perspective with clearly stated need for transport network virtualization = are critical in scoping the work and thus to achieve the deliverables of th= e working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to= enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Virtual network control and operation for core transport Packet Optical= Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Virtual network control and operation for mobile backhaul multi-technol= ogy transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network i= nfrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtua= l network negotiation, creation/deletion and modification. o Synchronization of network resources view across physical domain contro= ls and virtual network control. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator = administrative domain with an exception for the Data Center operation use c= ase. - Evaluation of Information model/data model to support the use cases= . - Requirements to support APIs/protocols, encoding languages, and dat= a models - Gap analysis of existing IETF and other protocols, encoding languag= es and data models to fulfill the requirements. - Protocol extensions (if necessary after re-chartering). The working group will determine if new protocol extensions are necessary. = If the working group determines they are necessary, then it will develop th= e new protocols within the working group where necessary, while interacting= with other working groups to enhance existing protocols where possible. --_000_65174429B5AF4C45BD0798810EC48E0A32366FCBEX0MB2lancsloca_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

All, the latest version (1.1) is now available on the Wiki:=

 

https://sites.google.com/site/actnbof/home/charter-proposal

 

Br, Dan.  

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 12 September 2014 22:25
To: actn@ietf.org
Subject: [Actn] ACTN charter v1.1

 

Hi,

&n= bsp;

We have= had pretty good discussions on ACTN charter 1.0. Thanks to all who provide= d good comments and suggestions.

&n= bsp;

At the = close of the week, I had chance to update the charter (v1.1) based on agree= -upon discussion points (there are still some unresolved points).  

Here= 217;s the output. Please refer to this version for any subsequent discussio= ns. Also attached is the Word document that shows the diff marks. I may hav= e missed some points you raised. Please raise them again if that is the case.

&n= bsp;

Thanks = & have a good weekend!

&n= bsp;

Young

&n= bsp;

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Friday, September 12, 2014 2:01 PM
To: Daniele Ceccarelli; Varma, Eve L (Eve); Dhruv Dhody; actn@ietf.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dani= ele,

&n= bsp;

I think= Segment Routing is a TE technique that can improve MPLS-TE networks, but n= ot sure if it in itself is a connection-oriented technologies. From a signa= ling standpoint, it may be regarded as a derivative of MPLS-TE. Please correct if I am wrong.

&n= bsp;

Thanks,=

Young

&n= bsp;

From: Daniele Ceccarelli [mailto:daniele.ceccarelli@ericsson.com]
Sent: Friday, September 12, 2014 9:27 AM
To: Varma, Eve L (Eve); Leeyoung; Dhruv Dhody; actn@ietf.org
Subject: RE: ACTN charter v1.0

 

Good ca= tch Eve,

 <= /span>

Could w= e include also segment routing into the list of connection oriented technol= ogies? I don’t know whether it could be considered as part of the MPL= S-TE or not (don’t think so).<= /span>

 <= /span>

BR
Daniele

 <= /span>

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Varma, Eve L (Eve)
Sent: gioved=EC 11 settembre 2014 18:09
To: Leeyoung; Dhruv Dhody; actn@iet= f.org
Subject: Re: [Actn] ACTN charter v1.0

 

Hi,

 

Just a quick te= rminology comment - the wording below infers OTN is only L1, when it is bot= h L1 and L0 J  So I wo= uld suggest to reword as “This implies that at least the following transport networks are in scope of the discussion of this draft: Layer 1 (= L1) and Layer 0 (L0) optical networks (e.g., OTN ODU, OCh/WSON), MPLS-TP, M= PLS-TE, as well as other emerging network technologies with connection-orie= nted behavior”.

 

Best regards,

Eve

 <= /span>

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: Thursday, September 11, 2014 11:17 AM
To: Dhruv Dhody; actn@ietf.org<= br> Subject: Re: [Actn] ACTN charter v1.0

 

Hi Dhru= v,

 <= /span>

Thanks = for providing your valuable comment.

 <= /span>

Please = see inline for my response. Thanks.<= /span>

 <= /span>

Young

 <= /span>

From: Dhruv Dhody
Sent: Wednesday, September 10, 2014 10:48 PM
To: Leeyoung; Leeyoung; actn@ietf.o= rg
Subject: RE: ACTN charter v1.0

 

Hi Young,

 

Please find some comments o= n the proposed charter.

 

* Do we need some text in c= harter also to specify what we consider as Transport networks?

 

YOUNG>> That may clar= ify the scope. Do you have any suggestion?  One definition from the Pr= oblem Statement draft (https://datatracker.ietf.org/doc/draft-leeki= ng-actn-problem-statement/) is as follows. Would this be good enough or need more work?

 

T= ransport networks are defined as network infrastructure that

&= nbsp;  provides connectivity and bandwidth for customer services. They=

&= nbsp;  are characterized by their ability to support server layer

&= nbsp;  provisioning and traffic engineering for client layer serv= ices,

&= nbsp;  such that resource guarantees may be provided to their cus= tomers.

&= nbsp;  Transport networks in this document refer to a set of different=

&= nbsp;  type of connection-oriented networks, which include Connection-=

&= nbsp;  Oriented Circuit Switched (CO-CS) networks and Connection-=

&= nbsp;  Oriented Packet Switched (CO-PS) networks. This implies that at

&= nbsp;  least the following transport networks are in scope of the=

&= nbsp;  discussion of this draft: Layer 1 (L1) optical networks (e.g.,

&= nbsp;  Optical Transport Networks (OTN) and Wavelength Switched O= ptical

&= nbsp;  Networks (WSON)), MPLS-TP, MPLS-TE, as well as other emerg= ing

&= nbsp;  network technologies with connection-oriented behavior.

 

 

* “Transport networks= have a variety of mechanisms to:

-    &n= bsp;          Facilitate separ= ation of data plane and control plane,

-    &n= bsp;          Allow for distri= buted or centralized signaling  for path setup and protection, and

-    &n= bsp;          Provide traffic = engineering mechanism via centralized path computation.”

 

Term ‘centralized sig= naling’ is confusing to me, do you mean, the use of NMS?

 

YOUNG>> Yes. We can r= eword the second point: “Allow for distributed signaling or an NMS-ba= sed centralized signaling for set up….”

 

* “The architecture w= ork will lead to requirements for information models and protocol extension= s between the virtual network controller and the physical network domain controllers and between the virtual network controller and multi-te= nant customer controllers.”

 

It would be nice to add = 220;multi-domain coordinator” with “virtual network controller&= #8221; to explicitly link them together. Also multi-tenant customer control= lers doesn’t convey the intention to have different customer controllers for each tenan= t, how about…

 

“The architecture wor= k will lead to requirements for information models and protocol extensions = between the virtual network controller (embedded in a multi-domain coordinator) and the physical network domain controllers and between the v= irtual network controller and multiple tenant customer controllers.”

 

YOUNG>> This sounds g= ood to me. Thanks.

 

* “The working group = will determine if new protocol extensions are necessary. If the working gro= up determines they are necessary, then it will develop the new protocols within the working group where necessary, while interacting with other wor= king groups to enhance existing protocols where possible.”

 

Suggest to re-word this as = it’s not clear – is it about extension to existing protocols or= new protocol and where that work might be taken up. Also Protocol extensio= ns is mentioned as a work item after re-chartering.  

 

YOUNG>> New protocol = extensions mean a brand new protocol (say, “ACTN” protocol per = se) that cannot be extended from existing protocols. But there may be some = areas where we need to expand from existing protocols. In such case, we need to = interact with the corresponding WGs. Perhaps an analogy would be that CCAMP= WG is chartered to work on OPSF-TE for specific technologies while OSPF WG= needs to be informed of the protocol changes.

 

* You may want to do charter text formatting in RFC text format taking = care of word-wraps and indentation

YOUNG>> Not sure what you meant here. Please clarify it for me.

Hope you find them useful i= n making the charter text crisp.

 

YOUNG>> Definitely. T= hanks a lot for your review and great comments.

 

Dhruv

 

 

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of Leeyoung
Sent: 10 September 2014 04:53
To: Leeyoung; actn@ietf.org
Subject: [Actn] ACTN charter v1.0

 

Sorry, = I forgot the Subject of this email. Here’s a retransmission with the = subject.

 <= /span>

From: Leeyoung
Sent: Tuesday, September 09, 2014 3:47 PM
To: actn@ietf.org
Subject:

 

Hi,

 

I hope your summer break was a = good one.

 

We’d like to give you som= e updates and plans on the ACTN work. We are going to request a formal BoF = in Honolulu IETF meeting. In doing so, we need a charter draft as part of t= he due diligence. Here’s an initial charter draft developed by the small set of proponents of the work based on the di= scussions and use-cases and other published documents.  We hope this c= aptures a workable ACTN scope.  This version 1.0 draft charter is also= posted in the wiki: https= ://sites.google.com/site/actnbof/home/charter-propor

 

Your review and comment will be= greatly appreciated to come up with a good charter developed by the commun= ity of interest.  

 

Best regards,=

Young (on behalf of the propone= nts)

 

-------------------------------= draft charter 1.0 ---------------------------------------------------------= -------------------------------------------

 

Transport networks have a variety of mec= hanisms to:

-     &= nbsp; F= acilitate separation of data plane and control plane,

-     &= nbsp; A= llow for distributed or centralized signaling  for path setup and prot= ection, and

-     &= nbsp; P= rovide traffic engineering mechanism via centralized path computation.

 <= /o:p>

These represent key technologies for ena= bling flexible and dynamic networking, and efficient control and recovery of resources. Although these tech= nologies provide significant benefits within a single domain control bounda= ry, they do not meet the growing need for transport network virtualization = in multi-domain transport networks. More and more network operators are building and operating on multi-domain= transport networks. These domains (collections of links and nodes) may be = each of a different technology, administrative zones, or vendor-specific is= lands. Establishment of end-to-end connections spanning multiple domains is a perpetual problem for operators= because of both operational concerns (control plane and management plane) = and interoperability issues (control plane and data plane).  Due to th= ese issues, new services that require connections that traverse multiple domains need significant planning and o= ften manual operations to interface different vendor equipment and technolo= gy.

 =

The aim of Abstraction and Control of Transpo= rt Networks (ACTN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to= view and control multi-subnet, multi-technology, multi-vendor domain netwo= rks. Abstraction of transport networks also allows operators to consolidate= their network services into multi-tenant virtual transport networks. This will enable rapid service deployment of n= ew dynamic and elastic services, and will improve overall network operation= s and scaling of existing services. Discussion with operators has also high= lighted a need for virtual network operation based on the abstraction of underlying technology and vendor dom= ains.

 =

Multi-domain network coordination function in= ACTN is built on a control hierarchy where a multi-domain coordinator interacts with each domain controller (e.g., EMS/NMS, GMPLS/PCE control pl= ane, SDN controller) for abstracting network resource information to provid= e virtual network control functions. This virtual network control functions= are embedded in a multi-domain network coordinator to support various services/clients/applications to cr= eate and manage their own virtual networks that share the common transport = network resources.

 =

The ACTN working group will work to develo= p a high-level architecture for transport network abstraction and control that facilitates seamless vertical service coordination across= multi-tenant customers (primarily internal service organizations with resp= ect to a network operator), the virtual network control and the physical ne= twork domain controls as well as a horizontal E2E service coordination across multi-domain networks. It wil= l identify key building components and the corresponding interfaces among t= hese components.  The architecture work will lead to requirements for information= models and protocol extensions between the virtual network controller and = the physical network domain controllers and between the virtual network controller and multi-tenant customer= controllers. Well-defined use cases fr= om operators perspective with clearly stated need for transport network vir= tualization are critical in scoping the work and thus to achieve the deliverables of the working group.=

 

The working group will work on the following items:

-     &= nbsp; High= -level architecture that describes the basic building blocks to enable tran= sport network virtualization to support use cases.

-     &= nbsp; Oper= ator-driven use cases to address the following initial items:

o   Virt= ual network control and operation for core transport Packet Optical Integra= tion (POI). (e.g., MPLS-TP, OTN/WSON)

o   Virt= ual network control and operation for mobile backhaul multi-technology tran= sport (e.g., MPLS-TP and MPLS/OTN)

o   Data= Center Operator’s interconnection with optical transport network inf= rastructure providers to support dynamic virtual circuit services.

o   Mult= i-tenant support to allow virtual network information query, virtual networ= k negotiation, creation/deletion and modification.

o   Sync= hronization of network resources view across physical domain controls and v= irtual network control.

o   Dynamic service control and monitoring across all entities.

<= span style=3D"font-size:10.0pt;line-height:150%;font-family:"Arial&quo= t;,"sans-serif";color:black">Initial work within the working grou= p will be limited to a single operator administrative domain with an exception for the Data Center operation use case.

-     &= nbsp; Eval= uation of Information model/data model to support the use cases.

-     &= nbsp; Requ= irements to support APIs/protocols, encoding languages, and data models

-     &= nbsp; Gap = analysis of existing IETF and other protocols, encoding languages and data = models to fulfill the requirements.

-     &= nbsp; Prot= ocol extensions (if necessary after re-chartering).

 

The working group will determine if new protocol extensions = are necessary. If the working group determines they are necessary, then it will develop the new protocols within the working group where nece= ssary, while interacting with other working groups to enhance existing prot= ocols where possible.

 

<= span lang=3D"EN-US" style=3D"font-size:10.0pt;line-height:150%;font-family:= "Arial","sans-serif""> 

 

--_000_65174429B5AF4C45BD0798810EC48E0A32366FCBEX0MB2lancsloca_-- From nobody Fri Sep 19 15:41:44 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F276D1A88F6 for ; Fri, 19 Sep 2014 15:41:42 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.201 X-Spam-Level: X-Spam-Status: No, score=-4.201 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8V2aQzRlYcNP for ; Fri, 19 Sep 2014 15:41:39 -0700 (PDT) Received: from ignavia.lancs.ac.uk (ignavia.lancs.ac.uk [148.88.25.16]) by ietfa.amsl.com (Postfix) with ESMTP id EFEA21A6F34 for ; Fri, 19 Sep 2014 15:41:38 -0700 (PDT) Received: from ex-0-ht0.lancs.ac.uk ([10.42.18.47] helo=EX-0-HT0.lancs.local) by ignavia.lancs.ac.uk with esmtp (Exim 4.72) (envelope-from ) id 1XV6rx-0004wY-SC for actn@ietf.org; Fri, 19 Sep 2014 23:41:37 +0100 Received: from EX-0-MB2.lancs.local ([fe80::9d98:936b:54d1:c531]) by EX-0-HT0.lancs.local ([fe80::7d10:114a:53b0:7f2f%12]) with mapi id 14.03.0174.001; Fri, 19 Sep 2014 23:41:36 +0100 From: "King, Daniel" To: "actn@ietf.org" Thread-Topic: ACTN Charter Proposal v1.2 Thread-Index: Ac/UWtYY6rXvoWDMSAus3ZnpVO8auw== X-VoiceMessageDuration: 1 Date: Fri, 19 Sep 2014 22:41:35 +0000 Message-ID: <65174429B5AF4C45BD0798810EC48E0A32367228@EX-0-MB2.lancs.local> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [176.227.128.84] x-iss-local-domain: 1 Content-Type: multipart/mixed; boundary="_002_65174429B5AF4C45BD0798810EC48E0A32367228EX0MB2lancsloca_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/SVwHWD15SvVLrXWn13PnIh7By9c Subject: [Actn] ACTN Charter Proposal v1.2 X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 19 Sep 2014 22:41:43 -0000 --_002_65174429B5AF4C45BD0798810EC48E0A32367228EX0MB2lancsloca_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi All,=20 Please find version v1.2 of the charter.=20 This version addresses/includes comments from: Dhruv Dhody, Eve Varma, Mike= Mossbarger, Nico Wauters, Daniele Ceccarelli, Sergio Belotti, Aihua Guo, R= ichard Yang, and Xu Yunbin.=20 >> Transport networks are defined as network infrastructure that provides connectivity and bandwidth for customer services. They are characterized by their ability to support server layer provisioning and traffic engineering for client layer services, such that resource guarantees may be provided to their customers. Transport networks here refer to a set of different type of connection-oriented networks, which include Connection-Oriented Circuit Switched (CO-CS) networks and Connection- Oriented Packet Switched (CO-PS) networks. This implies that at least the following transport networks are in scope: Layer 1 (L1) and Layer 0 (L0) optical networks (e.g., OTN, ODU, OCh/WSON), MPLS-TP, MPLS-TE, as well as other emerging network technologies with connection-oriented behavior. Transport networks have a variety of mechanisms to: - Facilitate separation of data plane and control plane, - Allow for distributed signaling or centralized models (e.g., NMS- based or centralized signaling) for path setup and protection, and - Provide traffic engineering mechanism via centralized path computation. These represent key technologies for enabling flexible and dynamic networking, and efficient control and recovery of resources. Although these technologies provide significant benefits within a single domain control boundary, they do not meet the growing need for transport network virtualization in multi-domain transport networks. More and more network operators are building and operating on multi-domain transport networks. These domains (collections of links and nodes) may be each of a different technology, administrative zones, or vendor-specific islands. Establishment of end-to-end connections spanning multiple domains is a perpetual problem for operators because of both operational concerns (control plane and management plane) and interoperability issues (control plane and data plane). Due to these issues, new services that require connections that traverse multiple domains need significant planning and often manual operations to interface different vendor equipment and technology. The aim of Abstraction and Control of Transport Networks (ACTN) is to facilitate a centralized virtual network operation: the creation of a virtualized environment allowing operators to view and control multi- subnet, multi-technology, multi-vendor domain networks. This will enable rapid service deployment of new dynamic and elastic services, and will improve overall network operations and scaling of existing services. Discussion with operators has also highlighted a need for operation of virtual networks based on the abstraction of underlying technology and vendor domains. Abstraction of transport networks also allows operators to consolidate their network services into multi-tenant virtual transport networks. Multi-domain network coordination function in ACTN is built on a control hierarchy where a multi-domain coordinator interacts with the control mechanism for each domain (e.g., EMS/NMS, GMPLS/PCE control plane, SDN controller) to represent abstraction of network resources and to provide control functions for virtual networks. These control functions enable various services/clients/applications to create and manage their own virtual networks that share the common transport network resources. The ACTN working group will work to develop a high-level architecture for transport network abstraction and control that facilitates seamless vertical service coordination across multi-tenant customers (primarily internal service organizations with respect to a network operator), the control of virtual and physical network domains, as well as a horizontal E2E service coordination across multi-domain networks. It will identify key building components and the corresponding interfaces among these components. Key components can be future building block or legacy components existing today. The architecture work will lead to requirements for information models and protocol extensions for communication between the components. Well-defined use cases from operators perspective with clearly stated need for transport network virtualization are critical in scoping the work and thus to achieve the deliverables of the working group. The working group will work on the following items: - High-level architecture that describes the basic building blocks to enable transport network virtualization to support use cases. - Operator-driven use cases to address the following initial items: o Control and operation of virtual networks for core transport Packet Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Control and operation of virtual networks for mobile backhaul multi- technology transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtual network negotiation, creation/deletion and modification. o Synchronization of network resources view across control of physical and virtual networks. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case. - Evaluation of Information model/data model to support the use cases. - Requirements to support APIs/protocols, encoding languages, and data models - Gap analysis of existing IETF and other protocols, encoding languages and data models to fulfil the requirements - Protocol extensions (if necessary after re-chartering) - Issues of security, privacy, and trust in mechanisms that provide control and abstraction across domain boundaries (and therefore across trust boundaries) The working group will determine if new protocol or extensions to existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group; on the other hand, any extensions to existing protocols would be done with interactions with other working groups where possible. Where the need for data models is identified, the working group will first examine data models already developed by other working groups. << The current charter text (and previous versions) is available at https://si= tes.google.com/site/actnbof/home/charter-proposal. 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([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id a2ecDI0fu4nE for ; Thu, 25 Sep 2014 01:29:49 -0700 (PDT) Received: from ignavia.lancs.ac.uk (ignavia.lancs.ac.uk [148.88.25.16]) by ietfa.amsl.com (Postfix) with ESMTP id AE4431A030A for ; Thu, 25 Sep 2014 01:29:48 -0700 (PDT) Received: from ex-1-ht0.lancs.ac.uk ([10.42.18.57] helo=EX-1-HT0.lancs.local) by ignavia.lancs.ac.uk with esmtp (Exim 4.72) (envelope-from ) id 1XX4Qt-00024U-TU for actn@ietf.org; Thu, 25 Sep 2014 09:29:47 +0100 Received: from EX-0-MB2.lancs.local ([fe80::9d98:936b:54d1:c531]) by EX-1-HT0.lancs.local ([fe80::d9e8:ad10:d075:a6b6%12]) with mapi id 14.03.0174.001; Thu, 25 Sep 2014 09:29:47 +0100 From: "King, Daniel" To: "actn@ietf.org" Thread-Topic: New version of the Charter (v1.3) Thread-Index: Ac/Yoqi5HAK1WjshQlmANMfx7Vwj9A== X-VoiceMessageDuration: 1 Date: Thu, 25 Sep 2014 08:29:47 +0000 Message-ID: <65174429B5AF4C45BD0798810EC48E0A3236AECE@EX-0-MB2.lancs.local> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [87.65.165.3] x-iss-local-domain: 1 Content-Type: multipart/alternative; boundary="_000_65174429B5AF4C45BD0798810EC48E0A3236AECEEX0MB2lancsloca_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/O0gD9X7Uv0D1qVoKTHlMrHd1ElY Subject: [Actn] New version of the Charter (v1.3) X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Sep 2014 08:29:50 -0000 --_000_65174429B5AF4C45BD0798810EC48E0A3236AECEEX0MB2lancsloca_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi All, Please find a new version of the ACTN Charter: https://sites.google.com/site/actnbof/home/charter-proposal We are now up to version 1.3. Recent updates include: - Clearer outline of the ACTN architecture and components - More detailed description of the work items - Propose that any protocol work should require a re-charter - Various NITS and grammar updates There has been a significant amount of discussion off list, via an informal= design team. Please move all discussion online so we can share thoughts an= d clarifications with all IETF participants. Br, Dan and Young. --_000_65174429B5AF4C45BD0798810EC48E0A3236AECEEX0MB2lancsloca_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi All,

 

Please find a new version of th= e ACTN Charter:

 

https://sites.google.com/site/actn= bof/home/charter-proposal

 

We are now up to version 1.3. R= ecent updates include:

 

- Clearer outline of the ACTN a= rchitecture and components

- More detailed description of = the work items

- Propose that any protocol wor= k should require a re-charter

- Various NITS and grammar upda= tes

 

There has been a significant am= ount of discussion off list, via an informal design team. Please move all d= iscussion online so we can share thoughts and clarifications with all IETF = participants.   

 

Br, Dan and Young. <= /span>

--_000_65174429B5AF4C45BD0798810EC48E0A3236AECEEX0MB2lancsloca_-- From nobody Thu Sep 25 02:24:38 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 72B6E1A1B7C for ; Thu, 25 Sep 2014 02:24:37 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -101.9 X-Spam-Level: X-Spam-Status: No, score=-101.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, USER_IN_WHITELIST=-100] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IxVxCWaGMFTe for ; Thu, 25 Sep 2014 02:24:35 -0700 (PDT) Received: from asmtp2.iomartmail.com (asmtp2.iomartmail.com [62.128.201.249]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AF02C1A6F02 for ; Thu, 25 Sep 2014 02:24:34 -0700 (PDT) Received: from asmtp2.iomartmail.com (localhost.localdomain [127.0.0.1]) by asmtp2.iomartmail.com (8.13.8/8.13.8) with ESMTP id s8P9OV1R031482 for ; Thu, 25 Sep 2014 10:24:31 +0100 Received: from 950129200 (dsl-sp-81-140-15-32.in-addr.broadbandscope.com [81.140.15.32]) (authenticated bits=0) by asmtp2.iomartmail.com (8.13.8/8.13.8) with ESMTP id s8P9OUtf031465 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO) for ; Thu, 25 Sep 2014 10:24:31 +0100 From: "Adrian Farrel" To: Date: Thu, 25 Sep 2014 10:24:27 +0100 Message-ID: <010201cfd8a2$819aa150$84cfe3f0$@olddog.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 14.0 Thread-Index: Ac/Yon9bHdP/pkGJTA2ObSbVVkCPqw== Content-Language: en-gb X-TM-AS-MML: disable X-TM-AS-Product-Ver: IMSS-7.1.0.1576-7.5.0.1018-20974.006 X-TM-AS-Result: No--8.304-10.0-31-10 X-imss-scan-details: No--8.304-10.0-31-10 X-TMASE-MatchedRID: PiuGJd1Q1uZb+0RgzO6VgJ1U1lojafr/AuQDJRMogRJgOcGYycfRsAV2 5mKnlcPsefe5c4DndPq9DbSdTbglU5eHpCXvaaghU6MXicCWNu6Hxi2fvkKUM2rhyhOS2sZfWbz Y4GA2m4uC21ZBgkEM8e56/5gUD/9t169DiSFaNwGZroPNdqiG89AXIk/QdO2+ClyrX4tOmxSjxY yRBa/qJX3mXSdV7KK4FAX4EtUi0PgLbigRnpKlKSPzRlrdFGDwkn3R5UVd6+7eN8dsI+jw4tR23 aSknAMgWmjpRymge5EaQXmGqcs2Fg== Archived-At: http://mailarchive.ietf.org/arch/msg/actn/P_6NhsHxw9G8yfnV-7ob85w9Oe4 Subject: [Actn] Next steps with ACTN X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: adrian@olddog.co.uk List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Sep 2014 09:24:37 -0000 Hi all, As you'll have seen there is an updated version of a draft charter posted (https://sites.google.com/site/actnbof/home/charter-proposal). There is also a formal request for a BoF (http://trac.tools.ietf.org/bof/trac/). There are quite a number of I-Ds (https://datatracker.ietf.org/doc/search/?name=-actn-&activedrafts=on&olddrafts= on&sort=) but some of them are looking a little stale. It would be good to see you moving these along a bit. There has been some busy discussion on the list in the last two weeks. This has mainly been about the charter text (which is fine) but I would not mind seeing more discussion about the architecture and problem space. The IESG will meet on 1st October to discuss all of the BoF proposals, so now is a good time to express your own opinions about all of this material. Thanks, Adrian From nobody Fri Sep 26 08:48:01 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6B4EE1A8924 for ; Fri, 26 Sep 2014 08:47:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.986 X-Spam-Level: X-Spam-Status: No, score=-3.986 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.786, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id x_w38wGScwTI for ; Fri, 26 Sep 2014 08:47:51 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E4E1E1A7023 for ; Fri, 26 Sep 2014 08:47:49 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml404-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJY70925; Fri, 26 Sep 2014 15:47:48 +0000 (GMT) Received: from DFWEML701-CHM.china.huawei.com (10.193.5.50) by lhreml404-hub.china.huawei.com (10.201.5.218) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 26 Sep 2014 16:47:46 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml701-chm ([10.193.5.50]) with mapi id 14.03.0158.001; Fri, 26 Sep 2014 08:47:29 -0700 From: Leeyoung To: Dhruv Dhody , Daniele Ceccarelli , "actn@ietf.org" Thread-Topic: ACTN architecture Thread-Index: Ac/Om8qi9g/D/THATIaDRn5wbOi7GACBkWJQABkBmyAAFQGYgAIQSSFg Date: Fri, 26 Sep 2014 15:47:27 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C3A082@dfweml706-chm> References: <4A1562797D64E44993C5CBF38CF1BE481276015F@ESESSMB301.ericsson.se> <23CE718903A838468A8B325B80962F9B865F029E@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C348CB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865F50B1@szxeml556-mbs.china.huawei.com> In-Reply-To: <23CE718903A838468A8B325B80962F9B865F50B1@szxeml556-mbs.china.huawei.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.68] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A082dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/v2e91UWqA1Ob94pY59F8ZxCzrTs Subject: Re: [Actn] ACTN architecture X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Sep 2014 15:47:57 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A082dfweml706chm_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Dhruv, It has been a long time since the last discussion. Sorry for my very late r= esponse. Please see inline for my comment. Please also see the updated framework draft in which architecture section w= as updated (See Section 6.1 and 6.5): http://datatracker.ietf.org/doc/draft-ceccarelli-actn-framework/ Thanks, Young From: Dhruv Dhody Sent: Tuesday, September 16, 2014 5:01 AM To: Leeyoung; Daniele Ceccarelli; actn@ietf.org Subject: RE: ACTN architecture Hi Young, Please see inline, look for [Dhruv2]. From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Daniele Ceccarelli Sent: 12 September 2014 23:21 To: actn@ietf.org Subject: [Actn] ACTN architecture Reposting my architecture considerations and Young's replies in a dedicated= thread. 1. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. [[DanCe]] Agree. Let's keep track of both of them. [Dhruv]: In the current architecture document we do not use the term 'coord= inator'; In the charter it says - "Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN = controller) for abstracting network resource information to provide virtual= network control functions. This virtual network control functions are embe= dded in a multi-domain network coordinator to support various services/clie= nts/applications to create and manage their own virtual networks that share= the common transport network resources." To me this reads as the coordinator and virtual network control function ar= e embedded together. If we feel that multiple options are okay and need to = be studied, we should relax the text in the charter. YOUNG>> I think VNC-PNC construct is the main architecture interface of ACT= N. Although Architecture document is being prepared, the current assumption= is that PNC has a minimum module as proxy to communicate with VNC. When VN= C deals with multi-domain networks, multi-domain coordination function aris= es within the VNC. I think this is case a (Per Daniele). The coordinator V= NC has to deal with multiple VNCs or PNCs with VN proxy function. [Dhruv 2]: In my opinion what Daniele suggest is more like - Daniele Case a: Virtual network Coordinator | | -------------+------------ | | | | | | VNC VNC VNC | | | | | | PNC PNC PNC Daniele Case b: VNC | | Physical network Coordinator | | -------------+------------ | | | | | | PNC PNC PNC Here the key difference is - 'multi-domain coordinator function' to be enga= ging with VNCs or PNCs in the southbound. YOUNG 2> Yes. Agree. >From your description I gather that the 'multi-domain coordinator function'= can interact with multiple VNC (case a) or interact with multiple PNC (cas= e b) which I also think is valid. Making this look like.... Multi-domain Coordinator (parent | -VNC) | -------------+------------ | | | | | | VNC VNC VNC | | | | | | PNC PNC PNC YOUNG 2> This above diagram is basically the same as Daniele's Case a. VNC | (probably embedded | together) Multi-domain Coordinator | | -------------+------------ | | | | | | PNC PNC PNC YOUNG 2> This is very close to Daniele's Case b except the 'Multi-dom= ain coordinator' is not explicitly defined as Physical Network Coordinator.= In the charter description, we embedded the multi-domain coordination fun= ction as part of VNC. Here VNC and MD coordinator can be decoupled as anoth= er possibility. The above diagram is different from Daniele's Case b if we= assume the interface between PNCs and the MD coordinator is of physical na= ture or of virtual nature. If this is of physical nature, then this interfa= ce may be slightly different from VNC-PNC interface (which we called VPI fo= r Case a. This is a PNC-PNC interface in a hierarchical fashion, for the la= ck of a better term PPI interface. What is the difference between VNC-PNC = and PNC-PNC interfaces? Since we are dealing with virtualization as the mai= n charter item, I would prefer to focus on VNC-PNC construct as Case a and = also for Case b if we were to interpret the interface between MD Coordinato= r and PNCs is of virtual nature. For case b (per Daniele), I think we are only concerned about VNC-PNC (as 1= :1) while how the PNC coordinator deals with its domain PNC controller is o= ut of scope of ACTN work in my view. In this case, we are only dealing wi= th the VNC with the PNC coordinator. Multi-domain coordination is "delegat= ed" to the PNC level. [Dhruv 2]: I am not sure what you mean here? YOUNG 2> Please see my above comment. So I think your point is that the current charter is more or less case a's = perspective. But I think case a is the base-line case to which ACTN work s= hould be focused on. Case b is subset of case a. I am not to sure The charter text thus seems more closely related to case (b) where a multi-= domain coordinator interacts with domain controllers (PNC) and this functio= n resides with virtual network control function. [Dhruv 2]: Yes. YOUNG 2> Yes, with an understanding that the [VNC+MD Coordinator] is int= erfacing with PNCs in a virtual manner. Again on multidomain: maybe we could improve the architecture draft saying = is centralized and what is distributed. E.g. VPN prefixes exchange could be= distributed (controllers speaking MP-BGP with each other) while provisioni= ng could be hierarchical (i.e. the coordinator asks controller A to provisi= on a path with domain A and asks controller B to provide a path within B so= to have an end to end path crossing domains A and B)...H-PCE like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? [[DanCe]] The scenarios that come to my mind are more "horizontal". I would= say the either the nodes speak MP-BGP with each other across the domains = (in case of distributed protocols) or the controllers gets the information = from its own domain and then speak MP-BGP with the other controllers "on be= half of their domains" [Dhruv]: I feel this is highly dependent on the physical network controller= s, if its a PCE it has its own way to do inter-PCE communication and if the= controller runs BGP it may directly interact with other controller. IMHO = the ACTN architecture should not impose any restriction on this interaction= , nor make it a pre-requisite as in some case the two controller may not be= able to interact with each other directly (different technology, vendor sp= ecific NMS etc). YOUNG>> I agree with you on this. BR Daniele --_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A082dfweml706chm_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Dhruv,

 

It has been a long tim= e since the last discussion. Sorry for my very late response. Please see in= line for my comment.

 

Please also see the up= dated framework draft in which architecture section was updated (See Sectio= n 6.1 and 6.5):

 

http://datatracker.i= etf.org/doc/draft-ceccarelli-actn-framework/

 

Thanks,

Young

 

From: Dhruv Dh= ody
Sent: Tuesday, September 16, 2014 5:01 AM
To: Leeyoung; Daniele Ceccarelli; actn@ietf.org
Subject: RE: ACTN architecture

 

Hi Young,

 

Please see inline, look for [Dhruv2].

 

 

From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Daniele Ceccarelli
Sent: 12 September 2014 23:21
To: actn@ietf.org
Subject: [Actn] ACTN architecture

 

Reposting my architect= ure considerations and Young’s replies in a dedicated thread.

 

 

1.&n= bsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.

 

YOUNG>> These option= s seem to be detailed architecture that the upcoming architecture document = should address in detail. My personal opinion is that both architectures ne= ed to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial baseli= ne architecture.

[[DanCe]] Agree. Let&#= 8217;s keep track of both of them.

[Dhruv]: In the= current architecture document we do not use the term ‘coordinator= 217;;

In the charter = it says – “Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.”  

To me this read= s as the coordinator and virtual network control function are embedded toge= ther. If we feel that multiple options are okay and need to be studied, we should relax the text in the charter.  

 

YOUNG>> I= think VNC-PNC construct is the main architecture interface of ACTN. Althou= gh Architecture document is being prepared, the current assumption is that PNC has a minimum module as proxy to communicate with VNC. When VN= C deals with multi-domain networks, multi-domain coordination function aris= es within the VNC.  I think this is case a (Per Daniele). The coordina= tor VNC has to deal with multiple VNCs or PNCs with VN proxy function.

[Dhruv 2]: &nbs= p;In my opinion what Daniele suggest is more like -

Daniele Case a:=

 

  &nb= sp;            =   Virtual network Coordinator

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            VNC&n= bsp;          VNC  &= nbsp;       VNC

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            PNC&n= bsp;          PNC  &= nbsp;       PNC

  &nb= sp;      

 

Daniele Case b:=          

  &nb= sp;            =             &nb= sp; VNC          &nb= sp;

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   Physical network Coordinator

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;             = ;            &n= bsp; |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            PNC&n= bsp;          PNC  &= nbsp;       PNC

 

Here the key difference is – ‘multi-domain coordinator func= tion’ to be engaging with VNCs or PNCs in the southbound.

 

YOUNG 2> Yes. Agree.

 

From your description I gather that the ‘multi-domain coordinator= function’ can interact with multiple VNC (case a) or interact with multiple PNC (case b) which I also think is valid.

Making this look like….

  &nb= sp;            =      Multi-domain Coordinator (parent=

  &nb= sp;            =             &nb= sp;  |          &nbs= p;    -VNC)

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            VNC&n= bsp;          VNC  &= nbsp;       VNC

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            PNC&n= bsp;          PNC  &= nbsp;       PNC     =  

  &nb= sp;            =

  YOUNG 2> This above diagram is basically the same as= Daniele’s Case a.      

  =             &nb= sp;         =

  &nb= sp;            =             &nb= sp; VNC          &nb= sp;

  &nb= sp;            =             &nb= sp;  | (probably embedded

  &nb= sp;            =             &nb= sp;  |  together)

  &nb= sp;            =     Multi-domain Coordinator     &n= bsp;            = ;            &n= bsp;   

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

   &n= bsp;            = ; PNC          PNC &= nbsp;        PNC

 

  &nb= sp;  YOUNG 2>  This is very close to Daniele’s= Case b except the ‘Multi-domain coordinator’ is not explicitly= defined as Physical Network Coordinator.  In the charter description,= we embedded the multi-domain coordination function as part of VNC. Here VNC and MD coo= rdinator can be decoupled as another possibility.  The above diagram i= s different from Daniele’s Case b if we assume the interface between = PNCs and the MD coordinator is of physical nature or of virtual nature. If this is of physical nature, then this inte= rface may be slightly different from VNC-PNC interface (which we called VPI= for Case a. This is a PNC-PNC interface in a hierarchical fashion, for the= lack of a better term PPI interface.  What is the difference between VNC-PNC and PNC-PNC interfaces? Since we ar= e dealing with virtualization as the main charter item, I would prefer to f= ocus on VNC-PNC construct as Case a and also for Case b if we were to inter= pret the interface between MD Coordinator and PNCs is of virtual nature.  

 <= /o:p>

 <= /o:p>

For case b (per= Daniele), I think we are only concerned about VNC-PNC (as 1:1) while how t= he PNC coordinator deals with its domain PNC controller is out of scope of ACTN work in  my view.  In this case, we are onl= y dealing with the VNC with the PNC coordinator.  Multi-domain coordin= ation is “delegated” to the PNC level.  =

[Dhruv 2]: I am= not sure what you mean here?

 

YOUNG 2> =  Please see my above comment.

 

So I think your= point is that the current charter is more or less case a’s perspecti= ve.  But I think case a is the base-line case to which ACTN work should be focused on. Case b is subset of case a.

 

I am not to sure

 

The charter text thus seems more closely related to case (b) where a mu= lti-domain coordinator interacts with domain controllers (PNC) and this function resides with virtual network control function.

[Dhruv 2]: Yes.

 YOUNG 2&= gt;   Yes, with an understanding that the [VNC+MD Coordinator= ] is interfacing with PNCs in a virtual manner.

     &nbs= p;         

Again on multidomain: maybe we could improve the architecture draft sa= ying is centralized and what is distributed. E.g. VPN prefixes exchange cou= ld be distributed (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the= coordinator asks controller A to provision a path with domain A and asks c= ontroller B to provide a path within B so to have an end to end path crossi= ng domains A and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

[[DanCe]] The scenario= s that come to my mind are more “horizontal”. I would say the e= ither the nodes speak MP-BGP with each other across the domains  (in c= ase of distributed protocols) or the controllers gets the information from its own domain and then speak MP-BGP with the other c= ontrollers “on behalf of their domains”

 

 

[Dhruv]: I feel= this is highly dependent on the physical network controllers, if its a PCE= it has its own way to do inter-PCE communication and if the controller runs BGP  it may directly interact with other controller. = IMHO the ACTN architecture should not impose any restriction on this intera= ction, nor make it a pre-requisite as in some case the two controller may n= ot be able to interact with each other directly (different technology, vendor specific NMS etc).

 

YOUNG>> I= agree with you on this.

 

BR
Daniele

 

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A082dfweml706chm_-- From nobody Fri Sep 26 15:02:33 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 67B131A0104 for ; Fri, 26 Sep 2014 15:02:30 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.986 X-Spam-Level: X-Spam-Status: No, score=-3.986 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.786, SPF_PASS=-0.001] autolearn=unavailable Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sFShYGi20bpH for ; Fri, 26 Sep 2014 15:02:28 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 957961A0164 for ; Fri, 26 Sep 2014 15:02:26 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml405-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJY88337; Fri, 26 Sep 2014 22:02:24 +0000 (GMT) Received: from DFWEML702-CHM.china.huawei.com (10.193.5.72) by lhreml405-hub.china.huawei.com (10.201.5.242) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 26 Sep 2014 23:02:22 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml702-chm ([10.193.5.72]) with mapi id 14.03.0158.001; Fri, 26 Sep 2014 15:02:17 -0700 From: Leeyoung To: "King, Daniel" , "actn@ietf.org" Thread-Topic: New version of the Charter (v1.3) Thread-Index: Ac/Yoqi5HAK1WjshQlmANMfx7Vwj9ABMtE+A Date: Fri, 26 Sep 2014 22:02:16 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9@dfweml706-chm> References: <65174429B5AF4C45BD0798810EC48E0A3236AECE@EX-0-MB2.lancs.local> In-Reply-To: <65174429B5AF4C45BD0798810EC48E0A3236AECE@EX-0-MB2.lancs.local> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.68] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/eTwyFUszmS0PcVBhWSaTEvOX500 Subject: Re: [Actn] New version of the Charter (v1.3) X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Sep 2014 22:02:30 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9dfweml706chm_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Dan, Thanks for uploading the newer version (1.3) of the charter. I just wanted to point out that we do actually propose protocol work within= the scope. If I rehash the exact working in the update, it reads as follow= s: The working group will work on the following items: - Complete the architecture that describes the basic building blocks to enable transport network vitalization to support use cases. - Complete the specification of operator-driven use cases to address the following initial items: o Control and operation of virtual networks for core transport Packet Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Control and operation of virtual networks for mobile backhaul multi- technology transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtual network negotiation, creation/deletion and modification. o Synchronization of network resources view across control of physical and virtual networks. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case. - Evaluate Information models / data models to support the use cases. - Develop requirements to support APIs/protocols, encoding languages, and data models including issues of security, privacy and trust mechanisms that provide control and abstraction across domain boundaries (and therefore across trust boundaries). - Evaluate existing IETF and other protocols, encoding languages and data models to fulfill the requirements. - Develop protocol extensions. The working group will determine if new protocol or extensions to existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group; on the other hand, any extensions to existing protocols would be done with interactions with other working groups where possible. Where the need for data models is identified, the working group will first examine data models already developed by other working groups. Regards, Young From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of King, Daniel Sent: Thursday, September 25, 2014 3:30 AM To: actn@ietf.org Subject: [Actn] New version of the Charter (v1.3) Hi All, Please find a new version of the ACTN Charter: https://sites.google.com/site/actnbof/home/charter-proposal We are now up to version 1.3. Recent updates include: - Clearer outline of the ACTN architecture and components - More detailed description of the work items - Propose that any protocol work should require a re-charter - Various NITS and grammar updates There has been a significant amount of discussion off list, via an informal= design team. Please move all discussion online so we can share thoughts an= d clarifications with all IETF participants. Br, Dan and Young. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9dfweml706chm_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Dan,

 

Thanks for uploading t= he newer version (1.3) of the charter. 

 

I just wanted to point= out that we do actually propose protocol work within the scope. If I rehas= h the exact working in the update, it reads as follows:

 

The working group will work on the follow= ing items:

 

- Complete the architecture that describe= s the basic building blocks to

 enable transport network vitalizati= on to support use cases.

 

- Complete the specification of operator-= driven use cases to address the

 following initial items:=

 o Control and operation of virtual = networks for core transport Packet

 Optical Integration (POI). (e.g., M= PLS-TP, OTN/WSON)

 o Control and operation of virtual = networks for mobile backhaul multi-

 technology transport (e.g., MPLS-TP= and MPLS/OTN)

 o Data Center Operator's interconne= ction with optical transport

 network infrastructure providers to= support dynamic virtual circuit

 services.

 o Multi-tenant support to allow vir= tual network information query,

 virtual network negotiation, creati= on/deletion and modification.

 o Synchronization of network resour= ces view across control of physical

 and virtual networks.

 o Dynamic service control and monit= oring across all entities.

 

 Initial work within the working gro= up will be limited to a single

 operator administrative domain with= an exception for the Data Center

 operation use case.

 

- Evaluate Information models / data mode= ls to support the use cases.

 

- Develop requirements to support APIs/pr= otocols, encoding languages,

 and data models including issues of= security, privacy and trust

 mechanisms that provide control and= abstraction across domain

 boundaries (and therefore across tr= ust boundaries).

 

- Evaluate existing IETF and other protoc= ols, encoding languages and

 data models to fulfill the requirem= ents.

 

- Develop protocol extensions. =

 

The working group will determine if new p= rotocol or extensions to

existing protocols are necessary. If the = working group determines they

are necessary, then it will develop new p= rotocols within the working

group; on the other hand, any extensions = to existing protocols would be

done with interactions with other working= groups where possible.

 

Where the need for data models is identif= ied, the working group will

first examine data models already develop= ed by other working groups.

 

Regards,

Young

 

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of King, Daniel
Sent: Thursday, September 25, 2014 3:30 AM
To: actn@ietf.org
Subject: [Actn] New version of the Charter (v1.3)<= /p>

 

Hi All,

 

Please find a new version of th= e ACTN Charter:

 

https://sites.google.com/site/actn= bof/home/charter-proposal

 

We are now up to version 1.3. R= ecent updates include:

 

- Clearer outline of the ACTN a= rchitecture and components

- More detailed description of = the work items

- Propose that any protocol wor= k should require a re-charter

- Various NITS and grammar upda= tes

 

There has been a significant am= ount of discussion off list, via an informal design team. Please move all d= iscussion online so we can share thoughts and clarifications with all IETF = participants.   

 

Br, Dan and Young. <= /span>

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9dfweml706chm_-- From nobody Fri Sep 26 15:02:37 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 67E461A0162 for ; Fri, 26 Sep 2014 15:02:30 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.986 X-Spam-Level: X-Spam-Status: No, score=-3.986 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.786, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id opHfychC2Vym for ; Fri, 26 Sep 2014 15:02:27 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A1EBD1A004E for ; Fri, 26 Sep 2014 15:02:26 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml404-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BJY88336; Fri, 26 Sep 2014 22:02:24 +0000 (GMT) Received: from DFWEML702-CHM.china.huawei.com (10.193.5.72) by lhreml404-hub.china.huawei.com (10.201.5.218) with Microsoft SMTP Server (TLS) id 14.3.158.1; Fri, 26 Sep 2014 23:02:21 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml702-chm ([10.193.5.72]) with mapi id 14.03.0158.001; Fri, 26 Sep 2014 15:02:17 -0700 From: Leeyoung To: "King, Daniel" , "actn@ietf.org" Thread-Topic: New version of the Charter (v1.3) Thread-Index: Ac/Yoqi5HAK1WjshQlmANMfx7Vwj9ABMtE+A Date: Fri, 26 Sep 2014 22:02:16 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9@dfweml706-chm> References: <65174429B5AF4C45BD0798810EC48E0A3236AECE@EX-0-MB2.lancs.local> In-Reply-To: <65174429B5AF4C45BD0798810EC48E0A3236AECE@EX-0-MB2.lancs.local> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.68] Content-Type: multipart/alternative; boundary="_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9dfweml706chm_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/eTwyFUszmS0PcVBhWSaTEvOX500 Subject: Re: [Actn] New version of the Charter (v1.3) X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 26 Sep 2014 22:02:30 -0000 --_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9dfweml706chm_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Dan, Thanks for uploading the newer version (1.3) of the charter. I just wanted to point out that we do actually propose protocol work within= the scope. If I rehash the exact working in the update, it reads as follow= s: The working group will work on the following items: - Complete the architecture that describes the basic building blocks to enable transport network vitalization to support use cases. - Complete the specification of operator-driven use cases to address the following initial items: o Control and operation of virtual networks for core transport Packet Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Control and operation of virtual networks for mobile backhaul multi- technology transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtual network negotiation, creation/deletion and modification. o Synchronization of network resources view across control of physical and virtual networks. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case. - Evaluate Information models / data models to support the use cases. - Develop requirements to support APIs/protocols, encoding languages, and data models including issues of security, privacy and trust mechanisms that provide control and abstraction across domain boundaries (and therefore across trust boundaries). - Evaluate existing IETF and other protocols, encoding languages and data models to fulfill the requirements. - Develop protocol extensions. The working group will determine if new protocol or extensions to existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group; on the other hand, any extensions to existing protocols would be done with interactions with other working groups where possible. Where the need for data models is identified, the working group will first examine data models already developed by other working groups. Regards, Young From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of King, Daniel Sent: Thursday, September 25, 2014 3:30 AM To: actn@ietf.org Subject: [Actn] New version of the Charter (v1.3) Hi All, Please find a new version of the ACTN Charter: https://sites.google.com/site/actnbof/home/charter-proposal We are now up to version 1.3. Recent updates include: - Clearer outline of the ACTN architecture and components - More detailed description of the work items - Propose that any protocol work should require a re-charter - Various NITS and grammar updates There has been a significant amount of discussion off list, via an informal= design team. Please move all discussion online so we can share thoughts an= d clarifications with all IETF participants. Br, Dan and Young. --_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9dfweml706chm_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Dan,

 

Thanks for uploading t= he newer version (1.3) of the charter. 

 

I just wanted to point= out that we do actually propose protocol work within the scope. If I rehas= h the exact working in the update, it reads as follows:

 

The working group will work on the follow= ing items:

 

- Complete the architecture that describe= s the basic building blocks to

 enable transport network vitalizati= on to support use cases.

 

- Complete the specification of operator-= driven use cases to address the

 following initial items:=

 o Control and operation of virtual = networks for core transport Packet

 Optical Integration (POI). (e.g., M= PLS-TP, OTN/WSON)

 o Control and operation of virtual = networks for mobile backhaul multi-

 technology transport (e.g., MPLS-TP= and MPLS/OTN)

 o Data Center Operator's interconne= ction with optical transport

 network infrastructure providers to= support dynamic virtual circuit

 services.

 o Multi-tenant support to allow vir= tual network information query,

 virtual network negotiation, creati= on/deletion and modification.

 o Synchronization of network resour= ces view across control of physical

 and virtual networks.

 o Dynamic service control and monit= oring across all entities.

 

 Initial work within the working gro= up will be limited to a single

 operator administrative domain with= an exception for the Data Center

 operation use case.

 

- Evaluate Information models / data mode= ls to support the use cases.

 

- Develop requirements to support APIs/pr= otocols, encoding languages,

 and data models including issues of= security, privacy and trust

 mechanisms that provide control and= abstraction across domain

 boundaries (and therefore across tr= ust boundaries).

 

- Evaluate existing IETF and other protoc= ols, encoding languages and

 data models to fulfill the requirem= ents.

 

- Develop protocol extensions. =

 

The working group will determine if new p= rotocol or extensions to

existing protocols are necessary. If the = working group determines they

are necessary, then it will develop new p= rotocols within the working

group; on the other hand, any extensions = to existing protocols would be

done with interactions with other working= groups where possible.

 

Where the need for data models is identif= ied, the working group will

first examine data models already develop= ed by other working groups.

 

Regards,

Young

 

 

From: ACTN [ma= ilto:actn-bounces@ietf.org] On Behalf Of King, Daniel
Sent: Thursday, September 25, 2014 3:30 AM
To: actn@ietf.org
Subject: [Actn] New version of the Charter (v1.3)<= /p>

 

Hi All,

 

Please find a new version of th= e ACTN Charter:

 

https://sites.google.com/site/actn= bof/home/charter-proposal

 

We are now up to version 1.3. R= ecent updates include:

 

- Clearer outline of the ACTN a= rchitecture and components

- More detailed description of = the work items

- Propose that any protocol wor= k should require a re-charter

- Various NITS and grammar upda= tes

 

There has been a significant am= ount of discussion off list, via an informal design team. Please move all d= iscussion online so we can share thoughts and clarifications with all IETF = participants.   

 

Br, Dan and Young. <= /span>

--_000_7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9dfweml706chm_-- From nobody Sat Sep 27 06:45:21 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BDC811A1B25 for ; Sat, 27 Sep 2014 06:45:19 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.2 X-Spam-Level: X-Spam-Status: No, score=-4.2 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id inYmCqolVCw5 for ; Sat, 27 Sep 2014 06:45:17 -0700 (PDT) Received: from sideburn.lancs.ac.uk (sideburn.lancs.ac.uk [148.88.17.22]) by ietfa.amsl.com (Postfix) with ESMTP id B718F1A1B24 for ; Sat, 27 Sep 2014 06:45:16 -0700 (PDT) Received: from ex-1-ht0.lancs.ac.uk ([10.42.18.57] helo=EX-1-HT0.lancs.local) by sideburn.lancs.ac.uk with esmtp (Exim 4.72) (envelope-from ) id 1XXsJF-0003MM-UG; Sat, 27 Sep 2014 14:45:14 +0100 Received: from EX-0-MB2.lancs.local ([fe80::9d98:936b:54d1:c531]) by EX-1-HT0.lancs.local ([fe80::d9e8:ad10:d075:a6b6%12]) with mapi id 14.03.0174.001; Sat, 27 Sep 2014 14:45:12 +0100 From: "King, Daniel" To: Leeyoung , "actn@ietf.org" Thread-Topic: New version of the Charter (v1.3) Thread-Index: Ac/Yoqi5HAK1WjshQlmANMfx7Vwj9ABMtE+AACDmKDA= Date: Sat, 27 Sep 2014 13:45:12 +0000 Message-ID: <65174429B5AF4C45BD0798810EC48E0A3236BA30@EX-0-MB2.lancs.local> References: <65174429B5AF4C45BD0798810EC48E0A3236AECE@EX-0-MB2.lancs.local> <7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C3A4B9@dfweml706-chm> Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [91.15.26.252] x-iss-local-domain: 1 Content-Type: multipart/alternative; boundary="_000_65174429B5AF4C45BD0798810EC48E0A3236BA30EX0MB2lancsloca_" MIME-Version: 1.0 Archived-At: http://mailarchive.ietf.org/arch/msg/actn/_mUMIpi5vfPnzaxG56vEp_1woTc Subject: Re: [Actn] New version of the Charter (v1.3) X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Sep 2014 13:45:19 -0000 --_000_65174429B5AF4C45BD0798810EC48E0A3236BA30EX0MB2lancsloca_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Young, Works for me. Br, Dan, From: Leeyoung [mailto:leeyoung@huawei.com] Sent: 26 September 2014 23:02 To: King, Daniel; actn@ietf.org Subject: RE: New version of the Charter (v1.3) Hi Dan, Thanks for uploading the newer version (1.3) of the charter. I just wanted to point out that we do actually propose protocol work within= the scope. If I rehash the exact working in the update, it reads as follow= s: The working group will work on the following items: - Complete the architecture that describes the basic building blocks to enable transport network vitalization to support use cases. - Complete the specification of operator-driven use cases to address the following initial items: o Control and operation of virtual networks for core transport Packet Optical Integration (POI). (e.g., MPLS-TP, OTN/WSON) o Control and operation of virtual networks for mobile backhaul multi- technology transport (e.g., MPLS-TP and MPLS/OTN) o Data Center Operator's interconnection with optical transport network infrastructure providers to support dynamic virtual circuit services. o Multi-tenant support to allow virtual network information query, virtual network negotiation, creation/deletion and modification. o Synchronization of network resources view across control of physical and virtual networks. o Dynamic service control and monitoring across all entities. Initial work within the working group will be limited to a single operator administrative domain with an exception for the Data Center operation use case. - Evaluate Information models / data models to support the use cases. - Develop requirements to support APIs/protocols, encoding languages, and data models including issues of security, privacy and trust mechanisms that provide control and abstraction across domain boundaries (and therefore across trust boundaries). - Evaluate existing IETF and other protocols, encoding languages and data models to fulfill the requirements. - Develop protocol extensions. The working group will determine if new protocol or extensions to existing protocols are necessary. If the working group determines they are necessary, then it will develop new protocols within the working group; on the other hand, any extensions to existing protocols would be done with interactions with other working groups where possible. Where the need for data models is identified, the working group will first examine data models already developed by other working groups. Regards, Young From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of King, Daniel Sent: Thursday, September 25, 2014 3:30 AM To: actn@ietf.org Subject: [Actn] New version of the Charter (v1.3) Hi All, Please find a new version of the ACTN Charter: https://sites.google.com/site/actnbof/home/charter-proposal We are now up to version 1.3. Recent updates include: - Clearer outline of the ACTN architecture and components - More detailed description of the work items - Propose that any protocol work should require a re-charter - Various NITS and grammar updates There has been a significant amount of discussion off list, via an informal= design team. Please move all discussion online so we can share thoughts an= d clarifications with all IETF participants. Br, Dan and Young. --_000_65174429B5AF4C45BD0798810EC48E0A3236BA30EX0MB2lancsloca_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Young,

 

Works for me.

 

Br, Dan,  

 

From: Leeyoung [mailto:leeyoung@huawei.com]
Sent: 26 September 2014 23:02
To: King, Daniel; actn@ietf.org
Subject: RE: New version of the Charter (v1.3)

 

Hi Dan,=

&n= bsp;

Thanks = for uploading the newer version (1.3) of the charter. 

&n= bsp;

I just = wanted to point out that we do actually propose protocol work within the sc= ope. If I rehash the exact working in the update, it reads as follows:=

&n= bsp;

The working group will wor= k on the following items:

 

- Complete the architectur= e that describes the basic building blocks to

 enable transport net= work vitalization to support use cases.

 

- Complete the specificati= on of operator-driven use cases to address the

 following initial it= ems:

 o Control and operat= ion of virtual networks for core transport Packet

 Optical Integration = (POI). (e.g., MPLS-TP, OTN/WSON)

 o Control and operat= ion of virtual networks for mobile backhaul multi-

 technology transport= (e.g., MPLS-TP and MPLS/OTN)

 o Data Center Operat= or's interconnection with optical transport

 network infrastructu= re providers to support dynamic virtual circuit

 services.=

 o Multi-tenant suppo= rt to allow virtual network information query,

 virtual network nego= tiation, creation/deletion and modification.

 o Synchronization of= network resources view across control of physical

 and virtual networks= .

 o Dynamic service co= ntrol and monitoring across all entities.

 

 Initial work within = the working group will be limited to a single

 operator administrat= ive domain with an exception for the Data Center

 operation use case.<= o:p>

 

- Evaluate Information mod= els / data models to support the use cases.

 

- Develop requirements to = support APIs/protocols, encoding languages,

 and data models incl= uding issues of security, privacy and trust

 mechanisms that prov= ide control and abstraction across domain

 boundaries (and ther= efore across trust boundaries).

 

- Evaluate existing IETF a= nd other protocols, encoding languages and

 data models to fulfi= ll the requirements.

 

- Develop protocol extensi= ons. 

 

The working group will det= ermine if new protocol or extensions to

existing protocols are nec= essary. If the working group determines they

are necessary, then it wil= l develop new protocols within the working

group; on the other hand, = any extensions to existing protocols would be

done with interactions wit= h other working groups where possible.

 

Where the need for data mo= dels is identified, the working group will

first examine data models = already developed by other working groups.

&n= bsp;

Regards= ,

Young

&n= bsp;

&n= bsp;

From: ACTN [mailto= :actn-bounces@ietf.org] On Behalf Of King, Daniel
Sent: Thursday, September 25, 2014 3:30 AM
To: actn@ietf.org
Subject: [Actn] New version of the Charter (v1.3)<= /p>

 

Hi All,

 

Please find a new version of th= e ACTN Charter:

 

https://sites.google.com/site/actn= bof/home/charter-proposal

 

We are now up to version 1.3. R= ecent updates include:

 

- Clearer outline of the ACTN a= rchitecture and components

- More detailed description of = the work items

- Propose that any protocol wor= k should require a re-charter

- Various NITS and grammar upda= tes

 

There has been a significant am= ount of discussion off list, via an informal design team. Please move all d= iscussion online so we can share thoughts and clarifications with all IETF = participants.   

 

Br, Dan and Young. <= /span>

--_000_65174429B5AF4C45BD0798810EC48E0A3236BA30EX0MB2lancsloca_-- From nobody Sun Sep 28 22:05:38 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 626E01A6FB8 for ; Sun, 28 Sep 2014 22:05:35 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.986 X-Spam-Level: X-Spam-Status: No, score=-4.986 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.786, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ezSdHoG77XDz for ; Sun, 28 Sep 2014 22:05:29 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 03DD91A6FB7 for ; Sun, 28 Sep 2014 22:05:27 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml402-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BKA31787; Mon, 29 Sep 2014 05:05:26 +0000 (GMT) Received: from SZXEML422-HUB.china.huawei.com (10.82.67.161) by lhreml402-hub.china.huawei.com (10.201.5.241) with Microsoft SMTP Server (TLS) id 14.3.158.1; Mon, 29 Sep 2014 06:05:24 +0100 Received: from szxeml556-mbs.china.huawei.com ([169.254.4.112]) by szxeml422-hub.china.huawei.com ([10.82.67.161]) with mapi id 14.03.0158.001; Mon, 29 Sep 2014 13:05:14 +0800 From: Dhruv Dhody To: Leeyoung , Daniele Ceccarelli , "actn@ietf.org" Thread-Topic: ACTN architecture Thread-Index: Ac/Om8qi9g/D/THATIaDRn5wbOi7GACBkWJQABkBmyAAFQGYgAIQSSFgAIF+6iA= Date: Mon, 29 Sep 2014 05:05:13 +0000 Message-ID: <23CE718903A838468A8B325B80962F9B86600573@szxeml556-mbs.china.huawei.com> References: <4A1562797D64E44993C5CBF38CF1BE481276015F@ESESSMB301.ericsson.se> <23CE718903A838468A8B325B80962F9B865F029E@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C348CB@dfweml706-chm> <23CE718903A838468A8B325B80962F9B865F50B1@szxeml556-mbs.china.huawei.com> <7AEB3D6833318045B4AE71C2C87E8E1729C3A082@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C3A082@dfweml706-chm> Accept-Language: en-GB, zh-CN, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.18.146.248] Content-Type: multipart/alternative; boundary="_000_23CE718903A838468A8B325B80962F9B86600573szxeml556mbschi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/-lf2qsh2GUV9ouVbXjqLCVTaf4A Subject: Re: [Actn] ACTN architecture X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Sep 2014 05:05:36 -0000 --_000_23CE718903A838468A8B325B80962F9B86600573szxeml556mbschi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Young, Thanks for the update to http://datatracker.ietf.org/doc/draft-ceccarelli-a= ctn-framework/ I will send my comments on the update in a separate thread... Rest inline w= ith tag [Dhruv 3] (snip) Reposting my architecture considerations and Young's replies in a dedicated= thread. 1. On multidomain issues: One question here: How do we want to manage = multi-domain? I see two ways: a. A coordinator of virtual network controllers - i.e. 1:1 relationshi= p between virtual network controller and physical network controller plus a= coordinator of virtual network controllers on top b. A coordinator of physical network controllers - i.e. a coordinator = of physical network controllers (1:N relationship between coordinator and P= NCs) with a virtual network controller on top? (1:1 relationship between PN= C coordinator and the VNC) Maybe we should consider both architectures, maybe pick one. YOUNG>> These options seem to be detailed architecture that the upcoming ar= chitecture document should address in detail. My personal opinion is that b= oth architectures need to be considered as a starting point. There may be o= ther variations. Then we may narrow the scope as an initial baseline archit= ecture. [[DanCe]] Agree. Let's keep track of both of them. [Dhruv]: In the current architecture document we do not use the term 'coord= inator'; In the charter it says - "Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN = controller) for abstracting network resource information to provide virtual= network control functions. This virtual network control functions are embe= dded in a multi-domain network coordinator to support various services/clie= nts/applications to create and manage their own virtual networks that share= the common transport network resources." To me this reads as the coordinator and virtual network control function ar= e embedded together. If we feel that multiple options are okay and need to = be studied, we should relax the text in the charter. YOUNG>> I think VNC-PNC construct is the main architecture interface of ACT= N. Although Architecture document is being prepared, the current assumption= is that PNC has a minimum module as proxy to communicate with VNC. When VN= C deals with multi-domain networks, multi-domain coordination function aris= es within the VNC. I think this is case a (Per Daniele). The coordinator V= NC has to deal with multiple VNCs or PNCs with VN proxy function. [Dhruv 2]: In my opinion what Daniele suggest is more like - Daniele Case a: Virtual network Coordinator | | -------------+------------ | | | | | | VNC VNC VNC | | | | | | PNC PNC PNC Daniele Case b: VNC | | Physical network Coordinator | | -------------+------------ | | | | | | PNC PNC PNC Here the key difference is - 'multi-domain coordinator function' to be enga= ging with VNCs or PNCs in the southbound. YOUNG 2> Yes. Agree. >From your description I gather that the 'multi-domain coordinator function'= can interact with multiple VNC (case a) or interact with multiple PNC (cas= e b) which I also think is valid. Making this look like.... Multi-domain Coordinator (parent | -VNC) | -------------+------------ | | | | | | VNC VNC VNC | | | | | | PNC PNC PNC YOUNG 2> This above diagram is basically the same as Daniele's Case a. VNC | (probably embedded | together) Multi-domain Coordinator | | -------------+------------ | | | | | | PNC PNC PNC YOUNG 2> This is very close to Daniele's Case b except the 'Multi-dom= ain coordinator' is not explicitly defined as Physical Network Coordinator.= In the charter description, we embedded the multi-domain coordination fun= ction as part of VNC. Here VNC and MD coordinator can be decoupled as anoth= er possibility. The above diagram is different from Daniele's Case b if we= assume the interface between PNCs and the MD coordinator is of physical na= ture or of virtual nature. If this is of physical nature, then this interfa= ce may be slightly different from VNC-PNC interface (which we called VPI fo= r Case a. This is a PNC-PNC interface in a hierarchical fashion, for the la= ck of a better term PPI interface. What is the difference between VNC-PNC = and PNC-PNC interfaces? Since we are dealing with virtualization as the mai= n charter item, I would prefer to focus on VNC-PNC construct as Case a and = also for Case b if we were to interpret the interface between MD Coordinato= r and PNCs is of virtual nature. [Dhruv 3]: I completely agree with you on this point. And thus prefer if we= do not dwell much on Daniele Case b, hierarchy among the PNC and PNC-PNC i= nterface being out of scope and focus of ACTN. For case b (per Daniele), I think we are only concerned about VNC-PNC (as 1= :1) while how the PNC coordinator deals with its domain PNC controller is o= ut of scope of ACTN work in my view. In this case, we are only dealing wi= th the VNC with the PNC coordinator. Multi-domain coordination is "delegat= ed" to the PNC level. [Dhruv 2]: I am not sure what you mean here? YOUNG 2> Please see my above comment. So I think your point is that the current charter is more or less case a's = perspective. But I think case a is the base-line case to which ACTN work s= hould be focused on. Case b is subset of case a. I am not to sure The charter text thus seems more closely related to case (b) where a multi-= domain coordinator interacts with domain controllers (PNC) and this functio= n resides with virtual network control function. [Dhruv 2]: Yes. YOUNG 2> Yes, with an understanding that the [VNC+MD Coordinator] is int= erfacing with PNCs in a virtual manner. [Dhruv 3]: we have not used the term 'multi-domain coordinator' in the draf= t-ceccarelli-actn-framework-03; but we use it in charter text, perhaps we c= an relook into this. Again on multidomain: maybe we could improve the architecture draft saying = is centralized and what is distributed. E.g. VPN prefixes exchange could be= distributed (controllers speaking MP-BGP with each other) while provisioni= ng could be hierarchical (i.e. the coordinator asks controller A to provisi= on a path with domain A and asks controller B to provide a path within B so= to have an end to end path crossing domains A and B)...H-PCE like. YOUNG>> Good point. I agree that the architecture draft should discuss thes= e dichotomy of control regimes (e.g., centralized vs. distributed). One que= stion I have: are you assuming the coordinator also speaks MP-BGP with lowe= r level PN controllers? If not, would the coordinator need to collect the V= PN prefixes using the interface between the coordinator and each PNC (that = speaks MP-BGP)? Then can this be viewed as a centralized component? [[DanCe]] The scenarios that come to my mind are more "horizontal". I would= say the either the nodes speak MP-BGP with each other across the domains = (in case of distributed protocols) or the controllers gets the information = from its own domain and then speak MP-BGP with the other controllers "on be= half of their domains" [Dhruv]: I feel this is highly dependent on the physical network controller= s, if its a PCE it has its own way to do inter-PCE communication and if the= controller runs BGP it may directly interact with other controller. IMHO = the ACTN architecture should not impose any restriction on this interaction= , nor make it a pre-requisite as in some case the two controller may not be= able to interact with each other directly (different technology, vendor sp= ecific NMS etc). YOUNG>> I agree with you on this. Regards, Dhruv --_000_23CE718903A838468A8B325B80962F9B86600573szxeml556mbschi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Young,

 

Thanks for the update to http://datatracker.ietf.org/doc/draf= t-ceccarelli-actn-framework/

I will send my comments on the update in a= separate thread… Rest inline with tag [Dhruv 3]

 

(snip)

 

Reposting my architect= ure considerations and Young’s replies in a dedicated thread.

 

 

1.&= nbsp;     On multidomain= issues: One question here: How do we want to manage multi-domain? I see tw= o ways:

a. &nbs= p;    A coordinator = of virtual network controllers – i.e. 1:1 relationship between virtua= l network controller and physical network controller plus a coordinator of = virtual network controllers on top

b. &nbs= p;    A coordinator = of physical network controllers – i.e. a coordinator of physical netw= ork controllers (1:N relationship between coordinator and PNCs) with a virt= ual network controller on top? (1:1 relationship between PNC coordinator and the VNC)

Maybe we should consider both architectures, maybe pick one.<= o:p>

 

YOUNG>> These option= s seem to be detailed architecture that the upcoming architecture document = should address in detail. My personal opinion is that both architectures ne= ed to be considered as a starting point. There may be other variations. Then we may narrow the scope as an initial baseli= ne architecture.

[[DanCe]] Agree. Let&#= 8217;s keep track of both of them.

[Dhruv]: In the= current architecture document we do not use the term ‘coordinator= 217;;

In the charter = it says – “Multi-domain network coordination function in ACT= N is built on a control hierarchy where a multi-domain coordinator interact= s with each domain controller (e.g., EMS/NMS, GMPLS/PCE control plane, SDN c= ontroller) for abstracting network resource information to provide virtual = network control functions. This virtual network control functions are embed= ded in a multi-domain network coordinator to support various services/clients/applications to create and manage thei= r own virtual networks that share the common transport network resources.”  

To me this read= s as the coordinator and virtual network control function are embedded toge= ther. If we feel that multiple options are okay and need to be studied, we should relax the text in the charter.  

 

YOUNG>> I= think VNC-PNC construct is the main architecture interface of ACTN. Althou= gh Architecture document is being prepared, the current assumption is that PNC has a minimum module as proxy to communicate with VNC. When VN= C deals with multi-domain networks, multi-domain coordination function aris= es within the VNC.  I think this is case a (Per Daniele). The coordina= tor VNC has to deal with multiple VNCs or PNCs with VN proxy function.

[Dhruv 2]: &nbs= p;In my opinion what Daniele suggest is more like -

Daniele Case a:=

 

  &nb= sp;            =   Virtual network Coordinator

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            VNC&n= bsp;          VNC  &= nbsp;       VNC

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            PNC&n= bsp;          PNC  &= nbsp;       PNC

  &nb= sp;      

 

Daniele Case b:=          

  &nb= sp;            =             &nb= sp; VNC          &nb= sp;

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   Physical network Coordinator

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;             = ;            &n= bsp; |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            PNC&n= bsp;          PNC  &= nbsp;       PNC

 

Here the key difference is – ‘multi-domain coordinator func= tion’ to be engaging with VNCs or PNCs in the southbound.

 

YOUNG 2> Yes. Agree.

 

From your description I gather that the ‘multi-domain coordinator= function’ can interact with multiple VNC (case a) or interact with multiple PNC (case b) which I also think is valid.

Making this look like….

  &nb= sp;            =      Multi-domain Coordinator (parent=

  &nb= sp;            =             &nb= sp;  |          &nbs= p;    -VNC)

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            VNC&n= bsp;          VNC  &= nbsp;       VNC

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            PNC&n= bsp;          PNC  &= nbsp;       PNC     =  

  &nb= sp;            =

  YOUNG 2> This above diagram is basically the same as= Daniele’s Case a.      

  =             &nb= sp;         =

  &nb= sp;            =             &nb= sp; VNC          &nb= sp;

  &nb= sp;            =             &nb= sp;  | (probably embedded

  &nb= sp;            =             &nb= sp;  |  together)

  &nb= sp;            =     Multi-domain Coordinator     &n= bsp;            = ;            &n= bsp;   

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =             &nb= sp;  |

  &nb= sp;            =   -------------+------------

  &nb= sp;            = |             = |            |<= /o:p>

  &nb= sp;            = |             = |            |<= /o:p>

   &n= bsp;            = ; PNC          PNC &= nbsp;        PNC

 

  &nb= sp;  YOUNG 2>  This is very close to Daniele’s= Case b except the ‘Multi-domain coordinator’ is not explicitly= defined as Physical Network Coordinator.  In the charter description,= we embedded the multi-domain coordination function as part of VNC. Here VNC and MD coo= rdinator can be decoupled as another possibility.  The above diagram i= s different from Daniele’s Case b if we assume the interface between = PNCs and the MD coordinator is of physical nature or of virtual nature. If this is of physical nature, then this inte= rface may be slightly different from VNC-PNC interface (which we called VPI= for Case a. This is a PNC-PNC interface in a hierarchical fashion, for the= lack of a better term PPI interface.  What is the difference between VNC-PNC and PNC-PNC interfaces? Since we ar= e dealing with virtualization as the main charter item, I would prefer to f= ocus on VNC-PNC construct as Case a and also for Case b if we were to inter= pret the interface between MD Coordinator and PNCs is of virtual nature.  

 <= /o:p>

[Dhruv 3]: I completely agree with you = on this point. And thus prefer if we do not dwell much on Daniele Case b, h= ierarchy among the PNC and PNC-PNC interface being out of scope and focus of ACTN.         &= nbsp; 

 <= /o:p>

For case b (per= Daniele), I think we are only concerned about VNC-PNC (as 1:1) while how t= he PNC coordinator deals with its domain PNC controller is out of scope of ACTN work in  my view.  In this case, we are onl= y dealing with the VNC with the PNC coordinator.  Multi-domain coordin= ation is “delegated” to the PNC level.  =

[Dhruv 2]: I am= not sure what you mean here?

 

YOUNG 2> =  Please see my above comment.

 

So I think your= point is that the current charter is more or less case a’s perspecti= ve.  But I think case a is the base-line case to which ACTN work should be focused on. Case b is subset of case a.

 

I am not to sure

 

The charter text thus seems more closely related to case (b) where a mu= lti-domain coordinator interacts with domain controllers (PNC) and this function resides with virtual network control function.

[Dhruv 2]: Yes.

 YOUNG 2&= gt;   Yes, with an understanding that the [VNC+MD Coordinator= ] is interfacing with PNCs in a virtual manner.

 

[Dhruv 3]: we have not used the term &#= 8216;multi-domain coordinator’ in the draft-ceccarelli-actn-framework= -03; but we use it in charter text, perhaps we can relook into this.

     &nbs= p;         

Again on multidomain: maybe we could improve the architecture draft sa= ying is centralized and what is distributed. E.g. VPN prefixes exchange cou= ld be distributed (controllers speaking MP-BGP with each other) while provisioning could be hierarchical (i.e. the= coordinator asks controller A to provision a path with domain A and asks c= ontroller B to provide a path within B so to have an end to end path crossi= ng domains A and B)…H-PCE like.

 

YOUNG>> Good poi= nt. I agree that the architecture draft should discuss these dichotomy of c= ontrol regimes (e.g., centralized vs. distributed). One question I have: ar= e you assuming the coordinator also speaks MP-BGP with lower level PN controllers? If not, would the coordinator need= to collect the VPN prefixes using the interface between the coordinator an= d each PNC (that speaks MP-BGP)? Then can this be viewed as a centralized c= omponent?

[[DanCe]] The scenario= s that come to my mind are more “horizontal”. I would say the e= ither the nodes speak MP-BGP with each other across the domains  (in c= ase of distributed protocols) or the controllers gets the information from its own domain and then speak MP-BGP with the other c= ontrollers “on behalf of their domains”

 

 

[Dhruv]: I feel= this is highly dependent on the physical network controllers, if its a PCE= it has its own way to do inter-PCE communication and if the controller runs BGP  it may directly interact with other controller. = IMHO the ACTN architecture should not impose any restriction on this intera= ction, nor make it a pre-requisite as in some case the two controller may n= ot be able to interact with each other directly (different technology, vendor specific NMS etc).

 

YOUNG>> I= agree with you on this.

 

 

Regards,

Dhruv

--_000_23CE718903A838468A8B325B80962F9B86600573szxeml556mbschi_-- From nobody Mon Sep 29 10:52:54 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EC5F81A8A76 for ; Mon, 29 Sep 2014 10:52:53 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -101.9 X-Spam-Level: X-Spam-Status: No, score=-101.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, USER_IN_WHITELIST=-100] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IPojD65mUvH8 for ; Mon, 29 Sep 2014 10:52:51 -0700 (PDT) Received: from asmtp1.iomartmail.com (asmtp1.iomartmail.com [62.128.201.248]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 592FE1A8A27 for ; Mon, 29 Sep 2014 10:52:51 -0700 (PDT) Received: from asmtp1.iomartmail.com (localhost.localdomain [127.0.0.1]) by asmtp1.iomartmail.com (8.13.8/8.13.8) with ESMTP id s8THqmBr016822; Mon, 29 Sep 2014 18:52:48 +0100 Received: from 950129200 ([12.133.26.10]) (authenticated bits=0) by asmtp1.iomartmail.com (8.13.8/8.13.8) with ESMTP id s8THqkOb016796 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Mon, 29 Sep 2014 18:52:47 +0100 From: "Adrian Farrel" To: Date: Mon, 29 Sep 2014 18:52:42 +0100 Message-ID: <03bc01cfdc0e$2c346d80$849d4880$@olddog.co.uk> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Outlook 14.0 Thread-Index: Ac/cDiPXMQFQG+jkRVKDqJnlOJCGwQ== Content-Language: en-gb X-TM-AS-MML: disable X-TM-AS-Product-Ver: IMSS-7.1.0.1576-7.5.0.1018-20984.001 X-TM-AS-Result: No--4.069-10.0-31-10 X-imss-scan-details: No--4.069-10.0-31-10 X-TMASE-MatchedRID: +f5ozrvXf/Ry8Na/USoDoLiMC5wdwKqdOL9BEHibhsiVEMx1gSjhQHI1 N/jgHoE101tAMl6Pf8/iywZvWifOtPzOShQnsZOJV9LwT29+rzb2kudi1D33EvMuCEhNXx7O6Fl CYbOxk7X6HhZWpEMzZCFSEIgeJrQYO+2+cNh6wvtK2kj7j4ouAL1Mh+qTeDjB1GLJ+o3La/rwVK uSbLr8UrpB4cNTdGWeC7fE9pGtPhMYB2fOueQzjzl/1fD/Gopd2K+lN2ZUJHbEQdG7H66TyHEqm 8QYBtMOGGXZQr51l0l4PS74nR2GWVbzdHinUHJbgsxMJJu14zmDlOaKfgEjf8ZKN6o1k3lMwyom TmOKjjpHEemBoIh+FEsi+OIabS5ZxCoeW0dT2BaH/JCvitQD6SHK6aCMTbp1P5auqMpnWCs= Archived-At: http://mailarchive.ietf.org/arch/msg/actn/1EMCVU2ReGJcnNLyB4iJ_wEG-6g Cc: 'Alia Atlas' Subject: [Actn] ACTN architecture and interfaces X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: adrian@olddog.co.uk List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Sep 2014 17:52:54 -0000 Hi, Thanks for the latest revision of http://www.ietf.org/id/draft-ceccarelli-actn-framework-03.txt I find the new Figure 5 particularly helpful in understanding the potential scope of the ACTN work. And this is important because at this stage if the process we are trying to work out exactly what an ACTN working group might work on if it was created. Looking at the v1.3 draft charter text at https://sites.google.com/site/actnbof/home/charter-proposal I see... > This architecture shows three > control components: the Customer Network Controller (CNC) responsible > for servicing requests from applications (such as OSS/NMS), the Virtual > Network Controller (VNC) responsible for realizing customer networks out > of physical network resources, and the Physical Network Controller (PNC) > responsible for control and provisioning in physical networks. The > architecture shows the need for interfaces between these components. I just want to check what this means. I read it as saying that interfaces B and C as shown on Figure 5 are in scope for an ACTN working group, but all other interfaces shown on the figure are not in scope. I believe this is consistent with Section 6.1.1 of the draft. Can y'all confirm that this is your understanding and what you want to work on and exclude. Thanks, Adrian From nobody Mon Sep 29 11:08:27 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3E4421A883A for ; Mon, 29 Sep 2014 11:08:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.987 X-Spam-Level: X-Spam-Status: No, score=-3.987 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.786, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Cdt5VBSyZEjb for ; Mon, 29 Sep 2014 11:08:17 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id DA4141A1AD2 for ; Mon, 29 Sep 2014 11:08:16 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml403-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BKB07297; Mon, 29 Sep 2014 18:08:15 +0000 (GMT) Received: from DFWEML705-CHM.china.huawei.com (10.193.5.142) by lhreml403-hub.china.huawei.com (10.201.5.217) with Microsoft SMTP Server (TLS) id 14.3.158.1; Mon, 29 Sep 2014 19:07:41 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml705-chm ([10.193.5.142]) with mapi id 14.03.0158.001; Mon, 29 Sep 2014 11:07:35 -0700 From: Leeyoung To: "adrian@olddog.co.uk" , "actn@ietf.org" Thread-Topic: [Actn] ACTN architecture and interfaces Thread-Index: Ac/cDiPXMQFQG+jkRVKDqJnlOJCGwQAAHQEA Date: Mon, 29 Sep 2014 18:07:34 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C3ABB3@dfweml706-chm> References: <03bc01cfdc0e$2c346d80$849d4880$@olddog.co.uk> In-Reply-To: <03bc01cfdc0e$2c346d80$849d4880$@olddog.co.uk> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.192.11.68] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/r43tO5qhm3mVM1NO6YqelszFjrs Cc: 'Alia Atlas' Subject: Re: [Actn] ACTN architecture and interfaces X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Sep 2014 18:08:24 -0000 Hi Adrian, Thanks for your bringing up this architecture discussion to the list. I fee= l it might be useful to bring up here Figure 5: .-------------- ------------- | | Application |-- ------------- | | I/F A -------- v ( ) -------------- - - | Customer | ( Customer ) | Network |--------->( Network ) | Controller | ( ) -------------- - - | ( ) | I/F B -------- v ^ ^ -------------- : : | Virtual | : . | Network | : . | Controller | -------- . I/F E -------------- ( ) . | - - . | I/F C ( Physical ) . v ( Network ) . --------------- ( ) -------- | |-----> - - ( ) -------------- | ( ) - - | Physical |-- -------- ( Physical ) | Network |----------------------->( Network ) | Controller | I/F D ( ) -------------- - - ( ) -------- Figure 5. ACTN Interfaces As you pointed out, the quoted charter and Section 6.1.1 of the framework d= raft are consistent in that both of them limit the scope of ACTN work to I/= F B and I/F C (Figure 5) that correspond to the CNC-VNC and VNC-PNC interfa= ce, respectively. Other interfaces are out of scope. They are shown for an = illustration purpose to give the overarching context of ACTN.=20 Best regards, Young -----Original Message----- From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Adrian Farrel Sent: Monday, September 29, 2014 12:53 PM To: actn@ietf.org Cc: 'Alia Atlas' Subject: [Actn] ACTN architecture and interfaces Hi, Thanks for the latest revision of http://www.ietf.org/id/draft-ceccarelli-actn-framework-03.txt I find the new Figure 5 particularly helpful in understanding the potential= scope of the ACTN work. And this is important because at this stage if the= process we are trying to work out exactly what an ACTN working group might= work on if it was created. Looking at the v1.3 draft charter text at https://sites.google.com/site/act= nbof/home/charter-proposal I see... > This architecture shows three > control components: the Customer Network Controller (CNC) responsible=20 > for servicing requests from applications (such as OSS/NMS), the=20 > Virtual Network Controller (VNC) responsible for realizing customer=20 > networks out of physical network resources, and the Physical Network=20 > Controller (PNC) responsible for control and provisioning in physical=20 > networks. The architecture shows the need for interfaces between these co= mponents. I just want to check what this means. I read it as saying that interfaces B= and C as shown on Figure 5 are in scope for an ACTN working group, but all= other interfaces shown on the figure are not in scope. I believe this is c= onsistent with Section 6.1.1 of the draft. Can y'all confirm that this is your understanding and what you want to work= on and exclude. Thanks, Adrian _______________________________________________ ACTN mailing list ACTN@ietf.org https://www.ietf.org/mailman/listinfo/actn From nobody Mon Sep 29 13:31:52 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B1F4F1ACC8B for ; Mon, 29 Sep 2014 13:31:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.902 X-Spam-Level: X-Spam-Status: No, score=-1.902 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GPO9QOV4hPYu for ; Mon, 29 Sep 2014 13:31:48 -0700 (PDT) Received: from na01-by2-obe.outbound.protection.outlook.com (mail-by2on0125.outbound.protection.outlook.com [207.46.100.125]) (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4E41C1ABD39 for ; 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Mon, 29 Sep 2014 23:02:00 +0200 (CEST) Received: from emea01-am1-obe.outbound.protection.outlook.com (10.92.5.139) by tls.telefonica.com (10.92.6.55) with Microsoft SMTP Server (TLS) id 14.3.195.1; Mon, 29 Sep 2014 23:01:59 +0200 Received: from DB4PR06MB576.eurprd06.prod.outlook.com (10.242.192.23) by DB4PR06MB575.eurprd06.prod.outlook.com (10.242.192.156) with Microsoft SMTP Server (TLS) id 15.0.1039.15; Mon, 29 Sep 2014 21:01:58 +0000 Received: from DB4PR06MB576.eurprd06.prod.outlook.com ([10.242.192.23]) by DB4PR06MB576.eurprd06.prod.outlook.com ([10.242.192.23]) with mapi id 15.00.1039.011; Mon, 29 Sep 2014 21:01:58 +0000 From: LUIS MIGUEL CONTRERAS MURILLO To: Leeyoung , "adrian@olddog.co.uk" , "actn@ietf.org" Thread-Topic: [Actn] ACTN architecture and interfaces Thread-Index: Ac/cDiPXMQFQG+jkRVKDqJnlOJCGwQAAHQEAAAY44bA= Date: Mon, 29 Sep 2014 21:01:58 +0000 Message-ID: <67fc7b199bea4c9f836686a244c6a920@DB4PR06MB576.eurprd06.prod.outlook.com> References: <03bc01cfdc0e$2c346d80$849d4880$@olddog.co.uk> <7AEB3D6833318045B4AE71C2C87E8E1729C3ABB3@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C3ABB3@dfweml706-chm> Accept-Language: es-ES, en-US Content-Language: es-ES X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [79.153.216.241] x-microsoft-antispam: BCL:0;PCL:0;RULEID:;SRVR:DB4PR06MB575; x-forefront-prvs: 034902F5BC x-forefront-antispam-report: SFV:NSPM; SFS:(10019020)(6009001)(164054003)(377454003)(199003)(59124003)(189002)(90102001)(50986999)(15975445006)(66066001)(20776003)(15202345003)(76482002)(99396003)(120916001)(64706001)(10300001)(101416001)(80022003)(83322001)(54356999)(46102003)(77982003)(74502003)(74662003)(79102003)(2201001)(74316001)(19580395003)(76176999)(106356001)(92566001)(81342003)(2656002)(19580405001)(108616004)(81542003)(105586002)(83072002)(33646002)(85306004)(31966008)(95666004)(2501002)(76576001)(97736003)(86362001)(4396001)(561944003)(87936001)(107046002)(21056001)(85852003)(24736002)(16351025005); DIR:OUT; SFP:1102; SCL:1; SRVR:DB4PR06MB575; H:DB4PR06MB576.eurprd06.prod.outlook.com; FPR:; MLV:sfv; PTR:InfoNoRecords; A:1; MX:1; LANG:en; Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: telefonica.com X-TM-AS-MML: No Archived-At: http://mailarchive.ietf.org/arch/msg/actn/Ons1iQLWumeIsZdLdEydjuPOVuA X-Mailman-Approved-At: Mon, 29 Sep 2014 14:10:47 -0700 Cc: 'Alia Atlas' Subject: Re: [Actn] ACTN architecture and interfaces X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Sep 2014 21:02:07 -0000 Hi Young One question raised to me when thinking about recursiveness in this archite= cture. What would be the schema in case where a VNC communicates with anoth= er VNC? This could be an scenario where a virtual network provider builds i= ts offered transport network capabilities total or partially on top of anot= her virtual network provider. There are some alternatives: a) CNC -- (i/f B) -- VNC -- { -- (i/f B) -- VNC -- (i/f C) -- PNC} b) CNC -- (i/f B) -- VNC -- { -- (i/f C) -- VNC -- (i/f C) -- PNC} c) both of them Regards Luis -----Mensaje original----- De: ACTN [mailto:actn-bounces@ietf.org] En nombre de Leeyoung Enviado el: lunes, 29 de septiembre de 2014 20:08 Para: adrian@olddog.co.uk; actn@ietf.org CC: 'Alia Atlas' Asunto: Re: [Actn] ACTN architecture and interfaces Hi Adrian, Thanks for your bringing up this architecture discussion to the list. I fee= l it might be useful to bring up here Figure 5: .-------------- ------------- | | Application |-- ------------- | | I/F A -------- v ( ) -------------- - - | Customer | ( Customer ) | Network |--------->( Network ) | Controller | ( ) -------------- - - | ( ) | I/F B -------- v ^ ^ -------------- : : | Virtual | : . | Network | : . | Controller | -------- . I/F E -------------- ( ) . | - - . | I/F C ( Physical ) . v ( Network ) . --------------- ( ) -------- | |-----> - - ( ) -------------- | ( ) - - | Physical |-- -------- ( Physical ) | Network |----------------------->( Network ) | Controller | I/F D ( ) -------------- - - ( ) -------- Figure 5. ACTN Interfaces As you pointed out, the quoted charter and Section 6.1.1 of the framework d= raft are consistent in that both of them limit the scope of ACTN work to I/= F B and I/F C (Figure 5) that correspond to the CNC-VNC and VNC-PNC interfa= ce, respectively. Other interfaces are out of scope. They are shown for an = illustration purpose to give the overarching context of ACTN. Best regards, Young -----Original Message----- From: ACTN [mailto:actn-bounces@ietf.org] On Behalf Of Adrian Farrel Sent: Monday, September 29, 2014 12:53 PM To: actn@ietf.org Cc: 'Alia Atlas' Subject: [Actn] ACTN architecture and interfaces Hi, Thanks for the latest revision of http://www.ietf.org/id/draft-ceccarelli-actn-framework-03.txt I find the new Figure 5 particularly helpful in understanding the potential= scope of the ACTN work. And this is important because at this stage if the= process we are trying to work out exactly what an ACTN working group might= work on if it was created. Looking at the v1.3 draft charter text at https://sites.google.com/site/act= nbof/home/charter-proposal I see... > This architecture shows three > control components: the Customer Network Controller (CNC) responsible > for servicing requests from applications (such as OSS/NMS), the > Virtual Network Controller (VNC) responsible for realizing customer > networks out of physical network resources, and the Physical Network > Controller (PNC) responsible for control and provisioning in physical > networks. The architecture shows the need for interfaces between these co= mponents. I just want to check what this means. I read it as saying that interfaces B= and C as shown on Figure 5 are in scope for an ACTN working group, but all= other interfaces shown on the figure are not in scope. I believe this is c= onsistent with Section 6.1.1 of the draft. Can y'all confirm that this is your understanding and what you want to work= on and exclude. Thanks, Adrian _______________________________________________ ACTN mailing list ACTN@ietf.org https://www.ietf.org/mailman/listinfo/actn _______________________________________________ ACTN mailing list ACTN@ietf.org https://www.ietf.org/mailman/listinfo/actn ________________________________ Este mensaje y sus adjuntos se dirigen exclusivamente a su destinatario, pu= ede contener informaci=C3=B3n privilegiada o confidencial y es para uso exc= lusivo de la persona o entidad de destino. Si no es usted. el destinatario = indicado, queda notificado de que la lectura, utilizaci=C3=B3n, divulgaci= =C3=B3n y/o copia sin autorizaci=C3=B3n puede estar prohibida en virtud de = la legislaci=C3=B3n vigente. Si ha recibido este mensaje por error, le roga= mos que nos lo comunique inmediatamente por esta misma v=C3=ADa y proceda a= su destrucci=C3=B3n. The information contained in this transmission is privileged and confidenti= al information intended only for the use of the individual or entity named = above. If the reader of this message is not the intended recipient, you are= hereby notified that any dissemination, distribution or copying of this co= mmunication is strictly prohibited. If you have received this transmission = in error, do not read it. Please immediately reply to the sender that you h= ave received this communication in error and then delete it. Esta mensagem e seus anexos se dirigem exclusivamente ao seu destinat=C3=A1= rio, pode conter informa=C3=A7=C3=A3o privilegiada ou confidencial e =C3=A9= para uso exclusivo da pessoa ou entidade de destino. Se n=C3=A3o =C3=A9 vo= ssa senhoria o destinat=C3=A1rio indicado, fica notificado de que a leitura= , utiliza=C3=A7=C3=A3o, divulga=C3=A7=C3=A3o e/ou c=C3=B3pia sem autoriza= =C3=A7=C3=A3o pode estar proibida em virtude da legisla=C3=A7=C3=A3o vigent= e. Se recebeu esta mensagem por erro, rogamos-lhe que nos o comunique imedi= atamente por esta mesma via e proceda a sua destrui=C3=A7=C3=A3o From nobody Mon Sep 29 15:58:16 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AD35C1ACD69 for ; Mon, 29 Sep 2014 15:58:15 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.987 X-Spam-Level: X-Spam-Status: No, score=-3.987 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.999, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.786, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id iqGHOTFqo-Pw for ; Mon, 29 Sep 2014 15:58:13 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 087111ACD68 for ; Mon, 29 Sep 2014 15:58:11 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml403-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BKB20419; Mon, 29 Sep 2014 22:58:10 +0000 (GMT) Received: from DFWEML703-CHM.china.huawei.com (10.193.5.130) by lhreml403-hub.china.huawei.com (10.201.5.217) with Microsoft SMTP Server (TLS) id 14.3.158.1; Mon, 29 Sep 2014 23:58:08 +0100 Received: from DFWEML706-CHM.china.huawei.com ([10.193.5.225]) by dfweml703-chm ([10.193.5.130]) with mapi id 14.03.0158.001; Mon, 29 Sep 2014 15:57:58 -0700 From: Leeyoung To: LUIS MIGUEL CONTRERAS MURILLO , "adrian@olddog.co.uk" , "actn@ietf.org" Thread-Topic: [Actn] ACTN architecture and interfaces Thread-Index: Ac/cDiPXMQFQG+jkRVKDqJnlOJCGwQAAHQEAAAY44bAAAgn18A== Date: Mon, 29 Sep 2014 22:57:57 +0000 Message-ID: <7AEB3D6833318045B4AE71C2C87E8E1729C3AE27@dfweml706-chm> References: <03bc01cfdc0e$2c346d80$849d4880$@olddog.co.uk> <7AEB3D6833318045B4AE71C2C87E8E1729C3ABB3@dfweml706-chm> <67fc7b199bea4c9f836686a244c6a920@DB4PR06MB576.eurprd06.prod.outlook.com> In-Reply-To: <67fc7b199bea4c9f836686a244c6a920@DB4PR06MB576.eurprd06.prod.outlook.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.47.134.88] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/S8EUGFgmmjCiy7Q4MS0RcsyhGE4 Cc: 'Alia Atlas' Subject: Re: [Actn] ACTN architecture and interfaces X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Sep 2014 22:58:15 -0000 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X-MS-TNEF-Correlator: x-originating-ip: [10.47.134.88] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/HIMHGKtvZei8lt-usBUFnob4CTQ Cc: 'Alia Atlas' Subject: Re: [Actn] ACTN architecture and interfaces X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Sep 2014 23:07:59 -0000 SGkgTHVpcywNCg0KSSBtZWFudA0KDQpiKSBWTkMgKFByb3ZpZGVyIFgpIC0tLSBpL2YgQi4xIC0t LS0tIFZOQyAoUHJvdmlkZXIgWCkgLS0tLSBpL2YgQyAtLS0tIFBOQyAoUHJvdmlkZXIgWCkNCg0K U29ycnkuDQpZb3VuZw0KDQotLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KRnJvbTogQUNUTiBb bWFpbHRvOmFjdG4tYm91bmNlc0BpZXRmLm9yZ10gT24gQmVoYWxmIE9mIExlZXlvdW5nDQpTZW50 OiBNb25kYXksIFNlcHRlbWJlciAyOSwgMjAxNCA1OjU4IFBNDQpUbzogTFVJUyBNSUdVRUwgQ09O 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bWFpbG1hbi9saXN0aW5mby9hY3RuDQo= From nobody Mon Sep 29 20:34:48 2014 Return-Path: X-Original-To: actn@ietfa.amsl.com Delivered-To: actn@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5E1121A00FB for ; Mon, 29 Sep 2014 20:34:47 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.687 X-Spam-Level: X-Spam-Status: No, score=-4.687 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, MIME_8BIT_HEADER=0.3, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.786, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hCj1H7HocKqG for ; Mon, 29 Sep 2014 20:34:44 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id ABB4C1A00F9 for ; Mon, 29 Sep 2014 20:34:43 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml404-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BND59863; Tue, 30 Sep 2014 03:34:41 +0000 (GMT) Received: from SZXEMA405-HUB.china.huawei.com (10.82.72.37) by lhreml404-hub.china.huawei.com (10.201.5.218) with Microsoft SMTP Server (TLS) id 14.3.158.1; Tue, 30 Sep 2014 04:34:40 +0100 Received: from SZXEMA504-MBX.china.huawei.com ([169.254.7.19]) by SZXEMA405-HUB.china.huawei.com ([10.82.72.37]) with mapi id 14.03.0158.001; Tue, 30 Sep 2014 11:34:28 +0800 From: Zhenghaomian To: Leeyoung , LUIS MIGUEL CONTRERAS MURILLO , "adrian@olddog.co.uk" , "actn@ietf.org" Thread-Topic: [Actn] ACTN architecture and interfaces Thread-Index: AQHP3DjhqSkKqDhwe0Gy8Xg65nZUwZwY//Rg Date: Tue, 30 Sep 2014 03:34:27 +0000 Message-ID: References: <03bc01cfdc0e$2c346d80$849d4880$@olddog.co.uk> <7AEB3D6833318045B4AE71C2C87E8E1729C3ABB3@dfweml706-chm> <67fc7b199bea4c9f836686a244c6a920@DB4PR06MB576.eurprd06.prod.outlook.com> <7AEB3D6833318045B4AE71C2C87E8E1729C3AE27@dfweml706-chm> In-Reply-To: <7AEB3D6833318045B4AE71C2C87E8E1729C3AE27@dfweml706-chm> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.66.53.113] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: http://mailarchive.ietf.org/arch/msg/actn/50PXB7fmi5S71V0a1r-emdxLc6Q Cc: 'Alia Atlas' Subject: [Actn] =?utf-8?b?562U5aSNOiAgQUNUTiBhcmNoaXRlY3R1cmUgYW5kIGludGVy?= =?utf-8?q?faces?= X-BeenThere: actn@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Abstraction and Control of Transport Networks \(ACTN\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 30 Sep 2014 03:34:47 -0000 SGksIEx1aXMgYW5kIFlvdW5nLA0KDQpUaGlzIGlzIHZlcnkgaW50ZXJlc3RpbmcgdG9waWMsIGZv 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