From C.Peoples@ulster.ac.uk Tue Nov 1 03:27:25 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F40D421F8F12 for ; Tue, 1 Nov 2011 03:27:24 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.202 X-Spam-Level: X-Spam-Status: No, score=-5.202 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HTML_MESSAGE=0.001, MIME_QP_LONG_LINE=1.396, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XUxfvUEZF21i for ; Tue, 1 Nov 2011 03:27:23 -0700 (PDT) Received: from e4.ulster.ac.uk (e4.ulster.ac.uk [194.80.87.111]) by ietfa.amsl.com (Postfix) with ESMTP id 9C31F21F8E8A for ; Tue, 1 Nov 2011 03:27:23 -0700 (PDT) Received: from m0.ulster.ac.uk (m0.ulster.ac.uk [194.80.87.153]) by e4.ulster.ac.uk (UU/BC) with ESMTP id pA1ARMoN020841 for ; Tue, 1 Nov 2011 10:27:22 GMT Received: from jnexc09.ad.ulster.ac.uk (jnexc09.ad.ulster.ac.uk [193.61.128.156]) by m0.ulster.ac.uk (UU/BC) with ESMTP id pA1ARM3t025879 for ; Tue, 1 Nov 2011 10:27:22 GMT (envelope-from e10415079@uucde.ulst.ac.uk) X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01CC9880.D78E4D70" Date: Tue, 1 Nov 2011 10:27:22 -0000 Message-ID: <5BEE8418A733624688A183865F7E22DC03057755@jnexc09.ad.ulster.ac.uk> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [CfP] IEEE/IFIP International Workshop on Management of the Future Internet (ManFI 2012) - April 16, 2012 - Maui, Hawaii, USA Thread-Index: AcyYgNeOQOVKdVPvRBKApXwfvJ5iHw== From: "Peoples, Cathryn" To: X-Mailman-Approved-At: Tue, 01 Nov 2011 07:29:40 -0700 Subject: [armd] [CfP] IEEE/IFIP International Workshop on Management of the Future Internet (ManFI 2012) - April 16, 2012 - Maui, Hawaii, USA X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Nov 2011 10:27:25 -0000 This is a multi-part message in MIME format. ------_=_NextPart_001_01CC9880.D78E4D70 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable -------------------------------------------------------------------------= ---------------------------- Please accept our apologies if you receive multiple copies of this CfP -------------------------------------------------------------------------= ---------------------------- IEEE/IFIP International Workshop on Management of the Future Internet = (ManFI 2012)=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=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=3D= =3D=3D=3D=3D=3D=3D=3D 16 April 2012 Maui, Hawaii, USA http://www.manfi.org = =20 CALL FOR PAPERS --------------- The Fourth IEEE/IFIP International Workshop on Management of the Future = Internet (ManFI 2012) will be held in conjunction with IEEE/IFIP NOMS = 2012 in Maui, Hawaii, USA, from April 16-20, 2012. The workshop is = sponsored by the IEEE Communications Society (ComSoc) and supported by = POSTECH ITCE, Ghent University-IBBT, NEC, and Ericsson LM. The workshop = is endorsed by the Technical Committee on Network Operations and = Management (CNOM). It is widely agreed that, despite its many successes, the current = Internet also has a set of systemic problems, ranging from an upcoming = shortage of IP addresses to insufficient security. However, the lack of = scalable and agile manageability is arguably more important, as without = management, it is impossible to build systems that adapt the services = and resources offered in a context-dependent manner. In either case (clean slate vs. evolution vs. revolution) we must = consider the manageability of the Future Internet from the beginning. = Following the success of the three previous editions of this workshop, = held in conjunction with IM 2009, NOMS 2010 and IM 2011, ManFI 2012 aims = at providing an international forum for researchers in these and similar = areas. ManFI 2012 will combine original full paper presentations with a = motivating keynote, quick hot topic presentations and a panel discussion = to thoroughly explore this challenging topic. Topics of interest ------------------ Authors are invited to submit papers that fall into or are related to = the topic areas listed below: - Architectural Issues * Advantages and disadvantages of revolutionary, evolutionary, and = other approaches to managing the Future Internet * Separation of data, control, and management planes * Design of architectural building blocks for managing the Future = Internet * Advances in measurement, management, security, accounting, = mobility, and other functions * Virtualization of resources and services * Dynamic composition of management and operational functionality * Mechanisms for managing interconnected computational = infrastructures (e.g. elastic clouds, federated clouds) in the Future = Internet * Implications of social network success on the Future Internet = architecture - Design and Implementation Issues * Abstractions for programmable network elements * Accommodating context-awareness in management * Applying situation awareness to network management * Federation between administrative domains and support of all = constituencies * The role of models, ontologies, and other knowledge abstractions in = the Future Internet * Uncertainty and probabilistic approaches to management of the = Future Internet * Approaches for the organization of management data, data analytics = and visualization * Experience reports from Future Internet experimental facilities = set-up and results - Economic Issues * Economic aspects driving the deployment of Future Internet = management technology * Economic opportunities and challenges for management technology * Experience reports from management in test beds Paper submission ---------------- Paper submissions must present original, research or experiences. = Late-breaking advances and work-in-progress reports from ongoing = research are also encouraged. Only original papers that have not been = published or submitted for publication elsewhere can be submitted. Each = submission must be written in English, accompanied by a 75 to 200 word = abstract that clearly outlines the scope and contributions of the paper, = and a list of up to 5 key words. There is a length limitation of 6 pages = (including title, abstract, all figures, tables, and references) for = regular conference papers, and 4 pages for short papers. Submissions = must be in IEEE 2-column style. Papers exceeding these limits, multiple = submissions, and self-plagiarized papers will be rejected without = further review. Authors should submit their papers in PDF, postscript, = or Word formats via JEMS: (https://submissoes.sbc.org.br/ = ). Proceedings ----------- Papers accepted for ManFI 2012 will be included in the conference = proceedings, IEEE Xplore, and EI Index. The IEEE reserves the right to = remove any paper from IEEE Xplore if the paper is not presented at the = workshop. Awards will be presented to the best paper and to the best = student paper at the workshop. Furthermore, we plan to work with a = leading journal, such as JNSM, TNSM and IJNM, to solicit extended = versions of the best papers of ManFI 2012 to be submitted for review. Workshop Co-Chairs ------------------ - Prof. James Won-Ki Hong, POSTECH, Korea - Prof. Filip De Turck, Ghent University - IBBT, Belgium - Dr. Yoshiaki Kiriha, NEC, Japan - Dr. Sven van der Meer, Ericsson LM, Ireland Publicity Co-Chairs ------------------- - Leonidas Lymberopoulos, National Technical University of Athens, = Greece=20 - Cathryn Peoples, University of Ulster, UK=20 Important dates --------------- - Abstract registration deadline: December 14, 2011 - Paper submission: December 20, 2011 - Notification of acceptance: January 31, 2012 - Final version of papers due: February 15, 2012 - Workshop date: April 16, 2012 For more information, please contact one of the Workshop Co-Chairs at = tpcchairs@manfi2012.org ------_=_NextPart_001_01CC9880.D78E4D70 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable =0A= =0A= =0A= =0A=
=0A=
------------------------------------------------------------= -----------------------------------------
 Please accept our = apologies if you receive multiple copies of this = CfP
------------------------------------------------------------------= -----------------------------------
=0A=

IEEE/IFIP International = Workshop on Management of the Future Internet (ManFI 2012) =
=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=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=3D=3D=3D=3D=3D=3D=3D=3D
16 April 2012
Maui, Hawaii, USA
http://www.manfi.org

=0A=

CALL FOR PAPERS
---------------
The Fourth IEEE/IFIP = International Workshop on Management of the Future Internet (ManFI 2012) = will be held in conjunction with IEEE/IFIP NOMS 2012 in Maui, Hawaii, = USA, from April 16-20, 2012. The workshop is sponsored by the IEEE = Communications Society (ComSoc) and supported by POSTECH ITCE, Ghent = University-IBBT, NEC, and Ericsson LM. The workshop is endorsed by the = Technical Committee on Network Operations and Management (CNOM).
=0A=
It is widely agreed that, despite its many successes, the current = Internet also has a set of systemic problems, ranging from an upcoming = shortage of IP addresses to insufficient security. However, the lack of = scalable and agile manageability is arguably more important, as without = management, it is impossible to build systems that adapt the services = and resources offered in a context-dependent manner.
=0A=
In either case (clean slate vs. evolution vs. revolution) we must = consider the manageability of the Future Internet from the beginning. = Following the success of the three previous editions of this workshop, = held in conjunction with IM 2009, NOMS 2010 and IM 2011, ManFI 2012 aims = at providing an international forum for researchers in these and similar = areas. ManFI 2012 will combine original full paper presentations with a = motivating keynote, quick hot topic presentations and a panel discussion = to thoroughly explore this challenging topic.
=0A=

Topics of interest
------------------
Authors are invited = to submit papers that fall into or are related to the topic areas listed = below:
- Architectural Issues
   * Advantages and = disadvantages of revolutionary, evolutionary, and other approaches to = managing the Future Internet
   * Separation of data, = control, and management planes
   * Design of architectural = building blocks for managing the Future Internet
   * = Advances in measurement, management, security, accounting, mobility, and = other functions
   * Virtualization of resources and = services
   * Dynamic composition of management and = operational functionality
   * Mechanisms for managing = interconnected computational infrastructures (e.g. elastic clouds, = federated clouds) in the Future Internet
   * Implications = of social network success on the Future Internet architecture
- = Design and Implementation Issues
   * Abstractions for = programmable network elements
   * Accommodating = context-awareness in management
   * Applying  = situation awareness to network management
   * Federation = between administrative domains and support of all = constituencies
   * The role of models, ontologies, and = other knowledge abstractions in the Future Internet
   * = Uncertainty and probabilistic approaches to management of the Future = Internet
   * Approaches for the organization of management = data, data analytics and visualization
   * Experience = reports from Future Internet experimental facilities set-up and = results
- Economic Issues
   * Economic aspects driving = the deployment of Future Internet management technology
   = * Economic opportunities and challenges for management = technology
   * Experience reports from management in test = beds
=0A=

Paper submission
----------------
Paper submissions must = present original, research or experiences. Late-breaking advances and = work-in-progress reports from ongoing research are also encouraged. Only = original papers that have not been published or submitted for = publication elsewhere can be submitted. Each submission must be written = in English, accompanied by a 75 to 200 word abstract that clearly = outlines the scope and contributions of the paper, and a list of up to 5 = key words. There is a length limitation of 6 pages (including title, = abstract, all figures, tables, and references) for regular conference = papers, and 4 pages for short papers. Submissions must be in IEEE = 2-column style. Papers exceeding these limits, multiple submissions, and = self-plagiarized papers will be rejected without further review. Authors = should submit their papers in PDF, postscript, or Word formats via JEMS: = (https://submissoes.sbc.org.br/).
=0A=

Proceedings
-----------
Papers accepted for ManFI 2012 = will be included in the conference proceedings, IEEE Xplore, and EI = Index. The IEEE reserves the right to remove any paper from IEEE Xplore = if the paper is not presented at the workshop. Awards will be presented = to the best paper and to the best student paper at the workshop. = Furthermore, we plan to work with a leading journal, such as JNSM, TNSM = and IJNM, to solicit extended versions of the best papers of ManFI 2012 = to be submitted for review.
=0A=

Workshop Co-Chairs
------------------
- Prof. James = Won-Ki Hong, POSTECH, Korea
- Prof. Filip De Turck, Ghent University = - IBBT, Belgium
- Dr. Yoshiaki Kiriha, NEC, Japan
- Dr. Sven van = der Meer, Ericsson LM, Ireland
=0A=

Publicity Co-Chairs
-------------------
- Leonidas = Lymberopoulos, National Technical University of Athens, Greece
- = Cathryn Peoples, University of Ulster, UK
=0A=

Important dates
---------------
- Abstract registration = deadline: December 14, 2011
- Paper submission: December 20, = 2011
- Notification of acceptance: January 31, 2012
- Final = version of papers due: February 15, 2012
- Workshop date: April 16, = 2012
=0A=

For more information, please contact one of the Workshop = Co-Chairs at tpcchairs@manfi2012.org
------_=_NextPart_001_01CC9880.D78E4D70-- From linda.dunbar@huawei.com Thu Nov 3 09:54:27 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BF99F11E80DC for ; Thu, 3 Nov 2011 09:54:27 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.483 X-Spam-Level: X-Spam-Status: No, score=-6.483 tagged_above=-999 required=5 tests=[AWL=0.115, BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qhFJwnG428fG for ; Thu, 3 Nov 2011 09:54:26 -0700 (PDT) Received: from usaga04-in.huawei.com (usaga04-in.huawei.com [206.16.17.180]) by ietfa.amsl.com (Postfix) with ESMTP id 835D111E80C5 for ; Thu, 3 Nov 2011 09:54:26 -0700 (PDT) Received: from huawei.com (usaga04-in [172.18.4.101]) by usaga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LU300ABIGAOVI@usaga04-in.huawei.com> for armd@ietf.org; Thu, 03 Nov 2011 11:54:25 -0500 (CDT) Received: from dfweml201-edg.china.huawei.com ([172.18.4.104]) by usaga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LU300FS9GAO0U@usaga04-in.huawei.com> for armd@ietf.org; Thu, 03 Nov 2011 11:54:24 -0500 (CDT) Received: from DFWEML402-HUB.china.huawei.com (10.193.5.102) by dfweml201-edg.china.huawei.com (172.18.9.107) with Microsoft SMTP Server (TLS) id 14.1.270.1; Thu, 03 Nov 2011 09:54:18 -0700 Received: from DFWEML505-MBX.china.huawei.com ([10.124.31.100]) by DFWEML402-HUB.china.huawei.com ([::1]) with mapi id 14.01.0270.001; Thu, 03 Nov 2011 09:54:18 -0700 Date: Thu, 03 Nov 2011 16:54:14 +0000 From: Linda Dunbar X-Originating-IP: [10.192.11.155] To: Thomas Narten Message-id: <4A95BA014132FF49AE685FAB4B9F17F6120B1FB3@dfweml505-mbx> MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_YkUf0gvIpNNyK0K2HvU1bQ)" Content-language: en-US Accept-Language: en-US Thread-topic: comments to "draft-ietf-armd-problem-statement-00" Thread-index: AcyaSTkBg2zmVh+lS7S9ZCFPnIBJmw== X-MS-Has-Attach: X-MS-TNEF-Correlator: Cc: "armd@ietf.org" Subject: [armd] comments to "draft-ietf-armd-problem-statement-00" X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 03 Nov 2011 16:54:27 -0000 --Boundary_(ID_YkUf0gvIpNNyK0K2HvU1bQ) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT Thomas, Thanks for the good draft has captured the ARP/ND scaling issues in data center really well. A few more minor comments to the draft: - Section 4.1, second paragraph: should indicate the inconvenience when there is no "VM move" involved. E.g. "One of the disadvantages is that a server can't be re-loaded with a different application in different IP subnet without IP address re-configuration on switches". - Section 3, second paragraph: Why do you say "servers are often pre-configured to run with a given set of IP addresses"? Do you mean "servers often have to run with a fixed set of IP addresses depending on which access switches they are under"? - Section 3, second paragraph: "if each top of rack switch is placed within it is own subnet", do you mean "if all the servers in one subnet are under one ToR"? - Page 5, the last sentence of the Second paragraph: "all servers on a single large L2 network": many people interpret "a single large L2 network" as one large broadcast domain (and forget there could be many VLANs). To be more accurate: "management is simplified if each ToR enables all VLANs (with each VLAN commonly mapped to one subnet) so that servers can be placed anywhere" - Section 1: last sentence of the first paragraph: Should "L2 Link" be "L2 Links"? Linda --Boundary_(ID_YkUf0gvIpNNyK0K2HvU1bQ) Content-type: text/html; charset=us-ascii Content-transfer-encoding: quoted-printable

Thomas,

 

Thanks for the good draft has captured the ARP/ND sc= aling issues in data center really well.

 

A few more minor comments to the draft:

 

-     &= nbsp;  Section 4.1, second paragraph: should indicate the = inconvenience when there is  no “VM move” involved. E.g. &= #8220;One of the disadvantages is that a server can’t be re-loaded wi= th a different application in different IP subnet without IP address re-configuration on switches”.

 

-     &= nbsp;  Section 3, second paragraph: Why do you say “= servers are often pre-configured to run with a given set of IP addresses= 221;?  Do you mean “servers often have to run with a fixed set o= f IP addresses depending on which access switches they are under”?

 

-     &= nbsp;  Section 3, second paragraph: “if each top of = rack switch is placed within it is own subnet”, do you mean “if= all the servers in one subnet are under one ToR”?  <= /p>

 

-     &= nbsp;  Page 5, the last sentence of the  Second parag= raph: “all servers on a single large L2 network”: many people i= nterpret “a single large L2 network”  as one large broadca= st domain (and forget there could be many VLANs).

 

To be more accurate: = ;

“management is simp= lified if each ToR enables all VLANs (with each VLAN  commonly mapped = to one subnet) so that servers can be placed anywhere”

 

-     &= nbsp;  Section 1: last sentence of the first paragraph: Sh= ould  “L2 Link”  be “L2 Links”?  

 

Linda

--Boundary_(ID_YkUf0gvIpNNyK0K2HvU1bQ)-- From d3e3e3@gmail.com Thu Nov 3 10:41:07 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F152C1F0C7C for ; Thu, 3 Nov 2011 10:41:06 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -104.128 X-Spam-Level: X-Spam-Status: No, score=-104.128 tagged_above=-999 required=5 tests=[AWL=-0.529, BAYES_00=-2.599, RCVD_IN_DNSWL_LOW=-1, USER_IN_WHITELIST=-100] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id xDhxS4qj9GtS for ; Thu, 3 Nov 2011 10:41:06 -0700 (PDT) Received: from mail-fx0-f44.google.com (mail-fx0-f44.google.com [209.85.161.44]) by ietfa.amsl.com (Postfix) with ESMTP id 860CE1F0C76 for ; Thu, 3 Nov 2011 10:41:05 -0700 (PDT) Received: by faas12 with SMTP id s12so2163909faa.31 for ; Thu, 03 Nov 2011 10:41:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; bh=dLox7xiQK+DPiZKqsEwwfQqeSJozjBGOToIPMTZj3qM=; b=LMvGRT/gTBxo2eQPcwe1lzjzeM7oOsSikzPxPUsOgSK/KSNRn4WJpXVmfEI7REJeUE fTRfC1tgwp6qpPGfYxCIS/ZwmDLbQNXlAA+2gNvK9CFCgSTLOJmZxUaVm4vnGrjzEmtd t2GSr1c7lMexHBqaRtIHlhBP6rZ4O6HX4do+g= Received: by 10.223.1.137 with SMTP id 9mr17359742faf.19.1320341878287; Thu, 03 Nov 2011 10:37:58 -0700 (PDT) MIME-Version: 1.0 Received: by 10.152.43.4 with HTTP; Thu, 3 Nov 2011 10:37:37 -0700 (PDT) In-Reply-To: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> From: Donald Eastlake Date: Thu, 3 Nov 2011 13:37:37 -0400 Message-ID: To: Linda Dunbar Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable Cc: Thomas Narten , "armd@ietf.org" Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 03 Nov 2011 17:41:07 -0000 You might have an 802.1D network without VLANs so I would suggest, as a general definition, something like: "The set of all links and switches that are traversed by a broadcast frame, that is, a frame with the broadcast destination L2 address. This is normally confined to a single VLAN." Thanks, Donald =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 =A0Donald E. Eastlake 3rd=A0=A0 +1-508-333-2270 (cell) =A0155 Beaver Street,=A0Milford, MA 01757 USA =A0d3e3e3@gmail.com On Thu, Oct 27, 2011 at 5:23 PM, Linda Dunbar wro= te: > draft-ietf-armd-problem-statement-00 has the following definition for > Broadcast Domain: > > > > Broadcast Domain: The set of all links and switches that are > > traversed in order to reach all nodes that are members of a given > > L2 domain. For example, when sending a broadcast packet on a > > VLAN, the domain would include all the links and switches that the > > packet traverses when broadcast traffic is sent. > > > > The phrase of =93are members of a given L2 domain=94 is a bit confusing b= ecause > L2 domain could have up to 4095 VLANS, with each one being its own broadc= ast > domain. > > > > Therefore, I think it is more accurate to say =93The set of all links and > switches that are traversed in order to reach all nodes that are members = of > a given VLAN of a L2 domain.=94 > > > > Any other suggestions? > > > > Linda > > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd > > From bschlies@cisco.com Thu Nov 3 11:56:35 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2BA8611E80AE for ; Thu, 3 Nov 2011 11:56:35 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.235 X-Spam-Level: X-Spam-Status: No, score=-6.235 tagged_above=-999 required=5 tests=[AWL=0.363, BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id j-UTMUrkp-2c for ; Thu, 3 Nov 2011 11:56:34 -0700 (PDT) Received: from mtv-iport-3.cisco.com (mtv-iport-3.cisco.com [173.36.130.14]) by ietfa.amsl.com (Postfix) with ESMTP id B374D1F0CBA for ; Thu, 3 Nov 2011 11:56:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=bschlies@cisco.com; l=4814; q=dns/txt; s=iport; t=1320346594; x=1321556194; h=from:subject:date:message-id:to:mime-version; bh=PKmdK/ccDYZUZMIYVaZoH+amB9eJO0PyGr8x7Vpak7s=; b=EFfw3jZKHFDmC+hAg4Bv7j4cOC3fjYEnTonYzxuQeNf39GI8WFJk1dJ9 3d3rm5qqeMBOOI+4oXiHOIxI3v0gThcxEeVdA796ZGHzD9S0sXZ/iPU35 PYhZ2it3EEmdPsFOsK6DXc8Cg5dElASgrRIYDsagfGRqwvePAipJx7u2c U=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AmYIAGbjsk6rRDoG/2dsb2JhbABEmkqHRAGGU4EhgQWCCwFbgVwJGYdolGKBJgGeb4g9YgSICIwQkgM X-IronPort-AV: E=Sophos;i="4.69,451,1315180800"; d="scan'208,217";a="12206204" Received: from mtv-core-1.cisco.com ([171.68.58.6]) by mtv-iport-3.cisco.com with ESMTP; 03 Nov 2011 18:56:33 +0000 Received: from sjc-bschlies-89112.cisco.com (sjc-bschlies-89112.cisco.com [10.20.217.237]) by mtv-core-1.cisco.com (8.14.3/8.14.3) with ESMTP id pA3IuXiV023342 for ; Thu, 3 Nov 2011 18:56:33 GMT From: Benson Schliesser Content-Type: multipart/alternative; boundary=Apple-Mail-10-589492720 Date: Thu, 3 Nov 2011 13:56:32 -0500 Message-Id: <2591DB96-1968-41CC-8CF7-A84EC852697D@cisco.com> To: armd@ietf.org Mime-Version: 1.0 (Apple Message framework v1084) X-Mailer: Apple Mail (2.1084) Subject: [armd] draft ARMD agenda for IETF-82 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 03 Nov 2011 18:56:35 -0000 --Apple-Mail-10-589492720 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii The draft agenda for ARMD at the IETF-82 meeting has been posted at = http://www.ietf.org/proceedings/82/agenda/armd.html ARMD Working Group - IETF 82 - Agenda Address Resolution for Massive numbers of hosts in the Data center = (ARMD) Location: 101B meeting room, Taipei International Convention Center = (TICC), Taipei, Taiwan Time: 15-Nov-2011, 1710-1810 - Tuesday, Afternoon Session III Chairs: Benson Schliesser (bschlies@cisco.com) & Linda Dunbar = (linda.dunbar@huawei.com) Jabber: armd@jabber.ietf.org URL: http://tools.ietf.org/wg/armd/ A. Meeting Administrivia (chairs - 05 min) Welcome Mailing list and URL Minutes Scribe Jabber Scribe Blue Sheets B. Data Center Reference Architectures (Manish Karir - 15 min) draft-armd-datacenter-reference-arch-01 C. Problem Statement for ARMD (Thomas Narten - 15 min) draft-ietf-armd-problem-statement-00 D. ARMD Work Plan (chairs - 20 min) Version 0, published 03-Nov-2011 --Apple-Mail-10-589492720 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii
The draft agenda for ARMD at = the IETF-82 meeting has been posted at http://www.ie= tf.org/proceedings/82/agenda/armd.html

ARMD Working Group - IETF 82 = - Agenda
Address Resolution for Massive numbers of hosts in the = Data center (ARMD)
Location:  101B meeting room, Taipei International = Convention Center (TICC), Taipei, Taiwan
Time:     =  15-Nov-2011, 1710-1810 - Tuesday, Afternoon Session = III
Chairs:    Benson Schliesser (bschlies@cisco.com) & Linda = Dunbar (linda.dunbar@huawei.com)
Jabber: =    armd@jabber.ietf.org
=

  A. Meeting Administrivia (chairs - 05 = min)
      Welcome
      Mailing = list and URL
      Minutes = Scribe
      Jabber = Scribe
      Blue Sheets

  B. Data Center = Reference Architectures (Manish Karir - 15 min)
      = draft-armd-datacenter-reference-arch-01

  C. Problem Statement = for ARMD (Thomas Narten - 15 min)
      = draft-ietf-armd-problem-statement-00

  D. ARMD Work Plan = (chairs - 20 min)

Version 0, published = 03-Nov-2011


= --Apple-Mail-10-589492720-- From mkarir@merit.edu Fri Nov 4 07:59:50 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3269C21F8C73 for ; Fri, 4 Nov 2011 07:59:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yOTBwiDrYs6H for ; Fri, 4 Nov 2011 07:59:49 -0700 (PDT) Received: from merit-proxy01.merit.edu (merit-proxy01.merit.edu [207.75.116.193]) by ietfa.amsl.com (Postfix) with ESMTP id 2EAD921F8C5E for ; Fri, 4 Nov 2011 07:59:49 -0700 (PDT) Received: from localhost (localhost.localdomain [127.0.0.1]) by merit-proxy01.merit.edu (Postfix) with ESMTP id 45E0D2039875; Fri, 4 Nov 2011 10:59:40 -0400 (EDT) X-Virus-Scanned: amavisd-new at merit-proxy01.merit.edu Received: from merit-proxy01.merit.edu ([127.0.0.1]) by localhost (merit-proxy01.merit.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GpXXkTI0OXSB; Fri, 4 Nov 2011 10:59:34 -0400 (EDT) Received: from dhcp60-218.merit.edu (dhcp60-218.merit.edu [198.108.60.218]) by merit-proxy01.merit.edu (Postfix) with ESMTPSA id 3A837203984C; Fri, 4 Nov 2011 10:59:34 -0400 (EDT) Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii From: Manish Karir In-Reply-To: <4EAEE8E4.90302@bogus.com> Date: Fri, 4 Nov 2011 10:59:34 -0400 Content-Transfer-Encoding: quoted-printable Message-Id: References: <905C201F-E6DD-4FA2-A65A-38472BA39571@merit.edu> <4EAEE8E4.90302@bogus.com> To: Joel jaeggli X-Mailer: Apple Mail (2.1084) Cc: armd@ietf.org Subject: Re: [armd] datacenter reference architecture draft X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Nov 2011 14:59:50 -0000 Hi Joel, The goal of 3.4.1-3.4.4 was to discuss variations on how L2/L3 = topologies can=20 vary from one data center to the next even with the generic data center logical model. These came out of various discussions at previous = ietf/nanog meetings and offline discussion. Some may not make sense to us, but = were the perfect solution to others who needed to solve a particular problem. = I think what we wanted to do with this draft is put these discussions down = in=20 one place to make sure we were all aware of what architectural decisions (tricks?) different people use to solve their application requirements. Hope this helps clarify things? =20 Also, is the basic description here consistent from what you have seen=20= in terms of data center architectures? What do you think is missing = here? Are there any other particularly interesting designs that you have come = across that should be included here? Thanks for your help. -manish On Oct 31, 2011, at 2:28 PM, Joel jaeggli wrote: > so, I looked at it for a while... >=20 > I'm a bit mystified by 3.4.1-3.4.4 >=20 > we've already arrived I guess at what we conclude is the ideal = topology, > and a particular model of mobility. >=20 > When faced with this choice and a desire to constrain both the > complexity and the diameter failure domain one response is to not make > the network the arbiter of mobility, e.g. move that to provisioning or > the application layer. the result is a lot closer to 3.4.1 than it is > the others. >=20 > One of he problems I have with managing a large l2 domain, = particularly > one constructed as an overlay is that there's effectively no upper = bound > appart from physics and good taste for how far it can spread, first = they > want across the rack, the module, then across the whole datacenter, = then > to the adjacent datacenter, across the country, to other cloud > providers, etc. if you constrain it sufficiently small that > availability is not a design consideration (1 or 2 switches is big l2 > domain) then it doesn't become a dependency. >=20 > Insisting that ip addresses move around with virtualized machines is = one > way to view the world but it not the only way. nor is constraining > tenets to common l2 buckets the only way to segment applications from > each other, the hosts for the virtual machines can just as well be = (are) > policy enforcement points. >=20 > On 10/28/11 09:01 , Manish Karir wrote: >>=20 >> The following draft was submitted to hopefully help focus the ARMD = discussion around a common architecture. >>=20 >> Comments and feedback are welcome. The goal of the writeup really is = to abstract away specific datacenter designs >> each of which focuses on solving a particular application/traffic = pattern by trying to talk about what is common between=20 >> the various designs. Hopefully this will help some of the very = varied discussion that has taken place in this WG so far. >>=20 >> Thanks. >> -manish >>=20 >> http://www.ietf.org/id/draft-armd-datacenter-reference-arch-01.txt >> ----------------------------------------- >> Filename: draft-karir-armd-datacenter-reference-arch >> Revision: 00 >> Title: Data Center Reference Architectures >> Creation date: 2011-10-24 >> WG ID: Individual Submission >> Number of pages: 11 >>=20 >> Abstract: >> The continued growth of large-scale data centers has resulted in a >> wide range of architectures and designs. Each design is tuned to >> address the challenges and requirements of the specific applications >> and workload that the data is being built for. Each design evolves >> as engineering solutions are developed to workaround limitations of >> existing protocols, hardware, as well as software implementations. >>=20 >> The goal of this document is to characterize this problem space in >> detail in order to better understand if there is any gap in making >> address resolution scale in various network designs for data >> centers. In particular it is our goal to peel back the various >> optimization and engineering solutions to develop generalized >> reference architectures for a data center. We also discuss the >> various factors that influence design choices in developing various >> data center designs. >> = --------------------------------------------------------------------------= >> _______________________________________________ >> armd mailing list >> armd@ietf.org >> https://www.ietf.org/mailman/listinfo/armd >>=20 >=20 From linda.dunbar@huawei.com Fri Nov 4 08:22:28 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7336421F8B50 for ; Fri, 4 Nov 2011 08:22:28 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.373 X-Spam-Level: X-Spam-Status: No, score=-6.373 tagged_above=-999 required=5 tests=[AWL=0.225, BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id OAljr9dBxNm6 for ; Fri, 4 Nov 2011 08:22:27 -0700 (PDT) Received: from usaga04-in.huawei.com (usaga04-in.huawei.com [206.16.17.180]) by ietfa.amsl.com (Postfix) with ESMTP id 88B4521F84A0 for ; Fri, 4 Nov 2011 08:22:27 -0700 (PDT) Received: from huawei.com (usaga04-in [172.18.4.101]) by usaga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LU500BCS6P75X@usaga04-in.huawei.com> for armd@ietf.org; Fri, 04 Nov 2011 10:22:20 -0500 (CDT) Received: from dfweml201-edg.china.huawei.com ([172.18.4.104]) by usaga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LU500IBT6P7JV@usaga04-in.huawei.com> for armd@ietf.org; Fri, 04 Nov 2011 10:22:19 -0500 (CDT) Received: from DFWEML404-HUB.china.huawei.com (10.193.5.203) by dfweml201-edg.china.huawei.com (172.18.9.107) with Microsoft SMTP Server (TLS) id 14.1.270.1; Fri, 04 Nov 2011 08:22:12 -0700 Received: from DFWEML505-MBX.china.huawei.com ([10.124.31.100]) by dfweml404-hub.china.huawei.com ([10.193.5.203]) with mapi id 14.01.0270.001; Fri, 04 Nov 2011 08:22:12 -0700 Date: Fri, 04 Nov 2011 15:22:05 +0000 From: Linda Dunbar X-Originating-IP: [10.192.11.155] To: "armd@ietf.org" Message-id: <4A95BA014132FF49AE685FAB4B9F17F6120B2751@dfweml505-mbx> MIME-version: 1.0 Content-type: multipart/alternative; boundary="Boundary_(ID_3tOf4yfrwReGhA2dKQAiuQ)" Content-language: en-US Accept-Language: en-US, zh-CN Thread-topic: Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-index: AcybBYYs4NlKLo5lSs+2Ulw1rfpnYQ== X-MS-Has-Attach: X-MS-TNEF-Correlator: Subject: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Nov 2011 15:22:28 -0000 --Boundary_(ID_3tOf4yfrwReGhA2dKQAiuQ) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT To make ARMD WG session more productive, please review the ARMD WG problem statement draft. A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Address Resolution for Massive numbers of hosts in the Data center Working Group of the IETF. Title : Problem Statement for ARMD Author(s) : Thomas Narten Filename : draft-ietf-armd-problem-statement-00.txt Pages : 11 Date : 2011-10-17 This document examines issues related to the massive scaling of data centers. Our initial scope is relatively narrow. Specifically, we focus on address resolution (ARP and ND) within the data center. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.txt Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ This Internet-Draft can be retrieved at: ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.txt --Boundary_(ID_3tOf4yfrwReGhA2dKQAiuQ) Content-type: text/html; charset=us-ascii Content-transfer-encoding: 7BIT

To make ARMD WG session more productive, please review the ARMD WG problem statement draft.

 

A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Address Resolution for Massive numbers of hosts in the Data center Working Group of the IETF.
 
        Title           : Problem Statement for ARMD
        Author(s)       : Thomas Narten
        Filename        : draft-ietf-armd-problem-statement-00.txt
        Pages           : 11
        Date            : 2011-10-17
 
   This document examines issues related to the massive scaling of data
   centers.  Our initial scope is relatively narrow.  Specifically, we
   focus on address resolution (ARP and ND) within the data center.
 
 
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.txt
 
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
 
This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.txt

 

--Boundary_(ID_3tOf4yfrwReGhA2dKQAiuQ)-- From prvs=42898f9db1=hshah@ciena.com Fri Nov 4 16:18:57 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 511BA21F8AD9 for ; Fri, 4 Nov 2011 16:18:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.811 X-Spam-Level: X-Spam-Status: No, score=-1.811 tagged_above=-999 required=5 tests=[AWL=-0.967, BAYES_00=-2.599, EXTRA_MPART_TYPE=1, HTML_MESSAGE=0.001, IP_NOT_FRIENDLY=0.334, RCVD_IN_DNSWL_LOW=-1, SARE_GIF_ATTACH=1.42] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qXl6QqsNSHoX for ; Fri, 4 Nov 2011 16:18:55 -0700 (PDT) Received: from mx0b-00103a01.pphosted.com (mx0b-00103a01.pphosted.com [67.231.152.227]) by ietfa.amsl.com (Postfix) with ESMTP id B08C921F8AD1 for ; Fri, 4 Nov 2011 16:18:55 -0700 (PDT) Received: from pps.filterd (m0001124 [127.0.0.1]) by mx0b-00103a01.pphosted.com (8.14.3/8.14.3) with SMTP id pA4NA2Jw019188; Fri, 4 Nov 2011 19:18:51 -0400 Received: from mdwexght01.ciena.com (LIN1-118-36-28.ciena.com [63.118.36.28]) by mx0b-00103a01.pphosted.com with ESMTP id 10vqcsrae3-1 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NOT); Fri, 04 Nov 2011 19:18:50 -0400 Received: from MDWEXGMB02.ciena.com ([::1]) by MDWEXGHT01.ciena.com ([::1]) with mapi; Fri, 4 Nov 2011 19:18:51 -0400 From: "Shah, Himanshu" To: Benson Schliesser , "armd@ietf.org" Content-Class: urn:content-classes:message Date: Fri, 4 Nov 2011 19:18:48 -0400 Thread-Topic: [armd] draft ARMD agenda for IETF-82 Thread-Index: AcyaWlQZ6ewNOjXxRuKxWswEaZJ/yAA68v2g Message-ID: References: <2591DB96-1968-41CC-8CF7-A84EC852697D@cisco.com> In-Reply-To: <2591DB96-1968-41CC-8CF7-A84EC852697D@cisco.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: acceptlanguage: en-US x-tm-as-product-ver: SMEX-10.0.0.1412-6.800.1017-18494.001 x-tm-as-result: No--50.859100-8.000000-31 x-tm-as-user-approved-sender: No x-tm-as-user-blocked-sender: No Content-Type: multipart/related; boundary="_004_B37E6A2CE5957F4E83C1D9845A0FFE388887BFA8MDWEXGMB02ciena_"; type="multipart/alternative" MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.4.6813, 1.0.211, 0.0.0000 definitions=2011-11-04_10:2011-11-04, 2011-11-04, 1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 ipscore=0 suspectscore=2 phishscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx engine=6.0.2-1012030000 definitions=main-1111040260 Subject: Re: [armd] draft ARMD agenda for IETF-82 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Nov 2011 23:18:57 -0000 --_004_B37E6A2CE5957F4E83C1D9845A0FFE388887BFA8MDWEXGMB02ciena_ Content-Type: multipart/alternative; boundary="_000_B37E6A2CE5957F4E83C1D9845A0FFE388887BFA8MDWEXGMB02ciena_" --_000_B37E6A2CE5957F4E83C1D9845A0FFE388887BFA8MDWEXGMB02ciena_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Ben and others - We did request a timeslot to present a light-weight 'solution'. I know 'solution' is a dirty word for the ARMD WG and we had some offline email discussions about this. Despite that, we would like a chance to present and let participants decide if fatigue has set in with 'problem discussions' and like to move on to solution phase. Perhaps this will serve as a springboard for moving the ARMD WG to another = area?? So here is the request - 20min Nabil Bitar (VZ) to present - http://www.ietf.org/id/draft-shah-armd-arp-re= duction-02.txt Thanks, himanshu [cid:image92d8c2.gif@75e89869.95c84952] From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of Ben= son Schliesser Sent: Thursday, November 03, 2011 2:57 PM To: armd@ietf.org Subject: [armd] draft ARMD agenda for IETF-82 The draft agenda for ARMD at the IETF-82 meeting has been posted at http://= www.ietf.org/proceedings/82/agenda/armd.html ARMD Working Group - IETF 82 - Agenda Address Resolution for Massive numbers of hosts in the Data center (ARMD) Location: 101B meeting room, Taipei International Convention Center (TICC)= , Taipei, Taiwan Time: 15-Nov-2011, 1710-1810 - Tuesday, Afternoon Session III Chairs: Benson Schliesser (bschlies@cisco.com= ) & Linda Dunbar (linda.dunbar@huawei.com) Jabber: armd@jabber.ietf.org URL: http://tools.ietf.org/wg/armd/ A. Meeting Administrivia (chairs - 05 min) Welcome Mailing list and URL Minutes Scribe Jabber Scribe Blue Sheets B. Data Center Reference Architectures (Manish Karir - 15 min) draft-armd-datacenter-reference-arch-01 C. Problem Statement for ARMD (Thomas Narten - 15 min) draft-ietf-armd-problem-statement-00 D. ARMD Work Plan (chairs - 20 min) Version 0, published 03-Nov-2011 --_000_B37E6A2CE5957F4E83C1D9845A0FFE388887BFA8MDWEXGMB02ciena_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <= meta content=3D"Microsoft Word 12 (filtered medium)" name=3DGenerator>
Hi Ben and others –

 

We did request a timeslot to present a light-weight= ‘solution’.

<= span style=3D'font-size:11.0pt;font-family:"Candara","sans-serif";color:#00= 66FF'>I know ‘solution’ is a dirty word for the ARMD WG and we = had some

offline em= ail discussions about this. Despite that, we would like a

chance to present and let participa= nts decide if fatigue has set in with

‘problem discussions’ and like to move on to= solution phase.

Pe= rhaps this will serve as a springboard for moving the ARMD WG to another ar= ea??

 

 

So here is the request – 20min <= o:p>

Nabil Bitar (VZ) to= present - http://www.ietf.org/id/draft-shah-armd-arp-reduction-02.txt

 

Thanks,

<= p class=3DMsoNormal>himanshu

 

 

 


3D"ciena

From: armd-bounces@ietf.org [mailto:armd-bounces@i= etf.org] On Behalf Of Benson Schliesser
Sent: Thursday, No= vember 03, 2011 2:57 PM
To: armd@ietf.org
Subject: [arm= d] draft ARMD agenda for IETF-82

 

The draft agenda for ARMD at the IETF-82 meeting has b= een posted at http://www.ietf.org/proceedings/82/agenda/armd.html=

 

<= p class=3DMsoNormal>ARMD Working Group = - IETF 82 - Agenda

Address Resolution for Massive numbers of = hosts in the Data center (ARMD)

Location:  101B meeting = room, Taipei International Convention Center (TICC), Taipei, Taiwan<= o:p>

Time:      15-Nov-2011, 1710-1810 - Tuesday, Afternoo= n Session III

Chairs:    Benson Schliesser (bschlies@cisco.com) & Linda Dunbar (= linda.dunbar@huawei.com)

 

=

  A. Meeting = Administrivia (chairs - 05 min)

      Welcome<= /span>

      Mailing list and URL

 = ;     Minutes Scribe

      Jabber Sc= ribe

      Blue Sheets

 

  B. Data Center Reference= Architectures (Manish Karir - 15 min)

      d= raft-armd-datacenter-reference-arch-01

 

  C. Problem Statement for ARMD (Thomas= Narten - 15 min)

      draft-ietf-armd-proble= m-statement-00

&n= bsp;

  D. ARMD Work Plan (chairs - 20 min)

 

Version 0, published 03-Nov-2011<= /span>

 

<= /div>

 


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3D18F21F84D5 for ; Sun, 6 Nov 2011 09:03:55 -0800 (PST) Received: from Zorch.local (c-98-234-216-143.hsd1.ca.comcast.net [98.234.216.143]) (authenticated bits=0) by nagasaki.bogus.com (8.14.4/8.14.4) with ESMTP id pA6H3rZX059119 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NOT); Sun, 6 Nov 2011 17:03:54 GMT (envelope-from joelja@bogus.com) Message-ID: <4EB6BDF9.70804@bogus.com> Date: Sun, 06 Nov 2011 09:03:53 -0800 From: Joel jaeggli User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 MIME-Version: 1.0 To: Manish Karir References: <905C201F-E6DD-4FA2-A65A-38472BA39571@merit.edu> <4EAEE8E4.90302@bogus.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.2.7 (nagasaki.bogus.com [147.28.0.81]); Sun, 06 Nov 2011 17:03:54 +0000 (UTC) Cc: armd@ietf.org Subject: Re: [armd] datacenter reference architecture draft X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Nov 2011 17:03:56 -0000 On 11/4/11 07:59 , Manish Karir wrote: > > Hi Joel, > > The goal of 3.4.1-3.4.4 was to discuss variations on how L2/L3 topologies can > vary from one data center to the next even with the generic data center > logical model. These came out of various discussions at previous ietf/nanog > meetings and offline discussion. Some may not make sense to us, but were > the perfect solution to others who needed to solve a particular problem. They make sense to someone. as I noted the authors have in the text come to some conclusions about what model is most appropiate for deploment within a datacenter in order to support a specific problem namely l2 v2 vm mobility. The notion that constraining the l2 domain to a single or two tor is only suitable for static environments is wrong. likewise that virtualization has to necessarily drive l2 mobility, it does not. > I > think what we wanted to do with this draft is put these discussions down in > one place to make sure we were all aware of what architectural decisions > (tricks?) different people use to solve their application requirements. > Hope this helps clarify things? > > Also, is the basic description here consistent from what you have seen > in terms of data center architectures? What do you think is missing here? > Are there any other particularly interesting designs that you have come across > that should be included here? > > Thanks for your help. > > -manish > > > > On Oct 31, 2011, at 2:28 PM, Joel jaeggli wrote: > >> so, I looked at it for a while... >> >> I'm a bit mystified by 3.4.1-3.4.4 >> >> we've already arrived I guess at what we conclude is the ideal topology, >> and a particular model of mobility. >> >> When faced with this choice and a desire to constrain both the >> complexity and the diameter failure domain one response is to not make >> the network the arbiter of mobility, e.g. move that to provisioning or >> the application layer. the result is a lot closer to 3.4.1 than it is >> the others. >> >> One of he problems I have with managing a large l2 domain, particularly >> one constructed as an overlay is that there's effectively no upper bound >> appart from physics and good taste for how far it can spread, first they >> want across the rack, the module, then across the whole datacenter, then >> to the adjacent datacenter, across the country, to other cloud >> providers, etc. if you constrain it sufficiently small that >> availability is not a design consideration (1 or 2 switches is big l2 >> domain) then it doesn't become a dependency. >> >> Insisting that ip addresses move around with virtualized machines is one >> way to view the world but it not the only way. nor is constraining >> tenets to common l2 buckets the only way to segment applications from >> each other, the hosts for the virtual machines can just as well be (are) >> policy enforcement points. >> >> On 10/28/11 09:01 , Manish Karir wrote: >>> >>> The following draft was submitted to hopefully help focus the ARMD discussion around a common architecture. >>> >>> Comments and feedback are welcome. The goal of the writeup really is to abstract away specific datacenter designs >>> each of which focuses on solving a particular application/traffic pattern by trying to talk about what is common between >>> the various designs. Hopefully this will help some of the very varied discussion that has taken place in this WG so far. >>> >>> Thanks. >>> -manish >>> >>> http://www.ietf.org/id/draft-armd-datacenter-reference-arch-01.txt >>> ----------------------------------------- >>> Filename: draft-karir-armd-datacenter-reference-arch >>> Revision: 00 >>> Title: Data Center Reference Architectures >>> Creation date: 2011-10-24 >>> WG ID: Individual Submission >>> Number of pages: 11 >>> >>> Abstract: >>> The continued growth of large-scale data centers has resulted in a >>> wide range of architectures and designs. Each design is tuned to >>> address the challenges and requirements of the specific applications >>> and workload that the data is being built for. Each design evolves >>> as engineering solutions are developed to workaround limitations of >>> existing protocols, hardware, as well as software implementations. >>> >>> The goal of this document is to characterize this problem space in >>> detail in order to better understand if there is any gap in making >>> address resolution scale in various network designs for data >>> centers. In particular it is our goal to peel back the various >>> optimization and engineering solutions to develop generalized >>> reference architectures for a data center. We also discuss the >>> various factors that influence design choices in developing various >>> data center designs. >>> -------------------------------------------------------------------------- >>> _______________________________________________ >>> armd mailing list >>> armd@ietf.org >>> https://www.ietf.org/mailman/listinfo/armd >>> >> > > From warren@kumari.net Sun Nov 6 23:42:52 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 29DE421F8513 for ; Sun, 6 Nov 2011 23:42:52 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -105.936 X-Spam-Level: X-Spam-Status: No, score=-105.936 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, DATE_IN_PAST_03_06=0.044, RCVD_IN_DNSWL_MED=-4, RCVD_IN_SORBS_WEB=0.619, USER_IN_WHITELIST=-100] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EBbT9jM4hyDg for ; Sun, 6 Nov 2011 23:42:51 -0800 (PST) Received: from vimes.kumari.net (vimes.kumari.net [198.186.192.250]) by ietfa.amsl.com (Postfix) with ESMTP id 9AE0921F8512 for ; Sun, 6 Nov 2011 23:42:51 -0800 (PST) Received: from [10.59.76.174] (unknown [210.229.158.64]) by vimes.kumari.net (Postfix) with ESMTPSA id CAB161B40488; Mon, 7 Nov 2011 02:42:45 -0500 (EST) Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=windows-1252 From: Warren Kumari In-Reply-To: Date: Sun, 6 Nov 2011 21:28:59 -0500 Content-Transfer-Encoding: quoted-printable Message-Id: References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> To: Donald Eastlake X-Mailer: Apple Mail (2.1084) Cc: Thomas Narten , "armd@ietf.org" Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Nov 2011 07:42:52 -0000 On Nov 3, 2011, at 1:37 PM, Donald Eastlake wrote: > You might have an 802.1D network without VLANs so I would suggest, as > a general definition, something like: >=20 > "The set of all links and switches that are traversed by a broadcast > frame, that is, a frame > with the broadcast destination L2 address. This is normally confined > to a single VLAN." +1 W >=20 > Thanks, > Donald > =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 > Donald E. Eastlake 3rd +1-508-333-2270 (cell) > 155 Beaver Street, Milford, MA 01757 USA > d3e3e3@gmail.com >=20 >=20 > On Thu, Oct 27, 2011 at 5:23 PM, Linda Dunbar = wrote: >> draft-ietf-armd-problem-statement-00 has the following definition for >> Broadcast Domain: >>=20 >>=20 >>=20 >> Broadcast Domain: The set of all links and switches that are >>=20 >> traversed in order to reach all nodes that are members of a given >>=20 >> L2 domain. For example, when sending a broadcast packet on a >>=20 >> VLAN, the domain would include all the links and switches that the >>=20 >> packet traverses when broadcast traffic is sent. >>=20 >>=20 >>=20 >> The phrase of =93are members of a given L2 domain=94 is a bit = confusing because >> L2 domain could have up to 4095 VLANS, with each one being its own = broadcast >> domain. >>=20 >>=20 >>=20 >> Therefore, I think it is more accurate to say =93The set of all links = and >> switches that are traversed in order to reach all nodes that are = members of >> a given VLAN of a L2 domain.=94 >>=20 >>=20 >>=20 >> Any other suggestions? >>=20 >>=20 >>=20 >> Linda >>=20 >> _______________________________________________ >> armd mailing list >> armd@ietf.org >> https://www.ietf.org/mailman/listinfo/armd >>=20 >>=20 > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd >=20 From ning.so@verizon.com Mon Nov 7 12:30:33 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8E80911E80C8 for ; Mon, 7 Nov 2011 12:30:33 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.889 X-Spam-Level: X-Spam-Status: No, score=-2.889 tagged_above=-999 required=5 tests=[AWL=0.709, BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eA+DvYAZJbgi for ; Mon, 7 Nov 2011 12:30:32 -0800 (PST) Received: from fldsmtpe01.verizon.com (fldsmtpe01.verizon.com [140.108.26.140]) by ietfa.amsl.com (Postfix) with ESMTP id 84BA711E808E for ; Mon, 7 Nov 2011 12:30:32 -0800 (PST) X-IronPort-Anti-Spam-Filtered: false Received: from unknown (HELO fldsmtpi02.verizon.com) ([166.68.71.144]) by fldsmtpe01.verizon.com with ESMTP; 07 Nov 2011 20:30:31 +0000 From: "So, Ning" X-IronPort-AV: E=Sophos;i="4.69,471,1315180800"; d="scan'208,217";a="175241992" Received: from fhdp1lumxc7hb05.verizon.com (HELO FHDP1LUMXC7HB05.us.one.verizon.com) ([166.68.59.192]) by fldsmtpi02.verizon.com with ESMTP; 07 Nov 2011 20:30:31 +0000 Received: from FHDP1LUMXC7V41.us.one.verizon.com ([169.254.1.133]) by FHDP1LUMXC7HB05.us.one.verizon.com ([166.68.59.192]) with mapi; Mon, 7 Nov 2011 15:30:31 -0500 To: "armd@ietf.org" Date: Mon, 7 Nov 2011 15:30:29 -0500 Thread-Topic: Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-Index: AcybBYYs4NlKLo5lSs+2Ulw1rfpnYQCdisnQAAQDXzA= Message-ID: <6665BC1FEA04AB47B1F75FA641C43BC08F9B4FE8@FHDP1LUMXC7V41.us.one.verizon.com> References: <4A95BA014132FF49AE685FAB4B9F17F6120BA8F8@dfweml506-mbx> In-Reply-To: <4A95BA014132FF49AE685FAB4B9F17F6120BA8F8@dfweml506-mbx> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_6665BC1FEA04AB47B1F75FA641C43BC08F9B4FE8FHDP1LUMXC7V41u_" MIME-Version: 1.0 Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 07 Nov 2011 20:30:33 -0000 --_000_6665BC1FEA04AB47B1F75FA641C43BC08F9B4FE8FHDP1LUMXC7V41u_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable All, The problem statement looks like a fine starting point to me. Best regards, Ning So Verizon Corporate Technology (office) 972-729-7905 (Cell) 972-955-0914 From: armd-bounces@ietf.org [mailto:armd-boun= ces@ietf.org] On Behalf Of Linda Dun= bar Sent: Friday, November 04, 2011 10:22 AM To: armd@ietf.org Subject: [armd] Need your action to review draft-ietf-armd-problem-statemen= t-00.txt To make ARMD WG session more productive, please review the ARMD WG problem = statement draft. A New Internet-Draft is available from the on-line Internet-Drafts director= ies. This draft is a work item of the Address Resolution for Massive number= s of hosts in the Data center Working Group of the IETF. Title : Problem Statement for ARMD Author(s) : Thomas Narten Filename : draft-ietf-armd-problem-statement-00.txt Pages : 11 Date : 2011-10-17 This document examines issues related to the massive scaling of data centers. Our initial scope is relatively narrow. Specifically, we focus on address resolution (ARP and ND) within the data center. A URL for this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.tx= t Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ This Internet-Draft can be retrieved at: ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.txt --_000_6665BC1FEA04AB47B1F75FA641C43BC08F9B4FE8FHDP1LUMXC7V41u_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

All,

 

The problem statement looks like a fine starting point = to me. 

 

 

B= est regards,

 

=

Ning So=

Verizon Corporate Technology

(office) 972-729-7905

= (Cell) 972-955-0914<= /p>

 

 

From: armd-bounces@iet= f.org [mailto:armd-bo= unces@ietf.org] On Behalf Of Linda Dunbar
Sent: Friday= , November 04, 2011 10:22 AM
To: armd@ietf.org
Subject: [armd] Need your action to review dra= ft-ietf-armd-problem-statement-00.txt

 

To make ARMD WG = session more productive, please review the ARMD WG problem statement draft.=

 

A New Intern=
et-Draft is available from the on-line Internet-Drafts directories. This dr=
aft is a work item of the Address Resolution for Massive numbers of hosts i=
n the Data center Working Group of the IETF.
&nbs=
p;
        Title &n=
bsp;         : Problem Statement fo=
r ARMD
        Auth=
or(s)       : Thomas Narten
<= pre>        Filename   &n= bsp;    : draft-ietf-armd-problem-statement-00.txt
        Pages  &nb=
sp;        : 11
&nb=
sp;       Date     &=
nbsp;      : 2011-10-17
=
 
   This document examines issues related t=
o the massive scaling of data
   centers.&nb=
sp; Our initial scope is relatively narrow.  Specifically, we
   focus on address resolution (ARP and ND) within t=
he data center.
 
 =
;
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-armd-problem-sta=
tement-00.txt
 
Internet=
-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-draft=
s/
 
This Internet-Draft=
 can be retrieved at:
ftp://ftp.ietf.org/=
internet-drafts/draft-ietf-armd-problem-statement-00.txt
 
= --_000_6665BC1FEA04AB47B1F75FA641C43BC08F9B4FE8FHDP1LUMXC7V41u_-- From thomas.morin@orange.com Tue Nov 8 00:47:21 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 701A721F8C81 for ; Tue, 8 Nov 2011 00:47:21 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.249 X-Spam-Level: X-Spam-Status: No, score=-3.249 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HELO_EQ_FR=0.35, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hk+buPrYxoxK for ; Tue, 8 Nov 2011 00:47:20 -0800 (PST) Received: from p-mail2.rd.francetelecom.com (p-mail2.rd.francetelecom.com [195.101.245.16]) by ietfa.amsl.com (Postfix) with ESMTP id 96E9121F8C3A for ; Tue, 8 Nov 2011 00:47:15 -0800 (PST) Received: from p-mail2.rd.francetelecom.com (localhost.localdomain [127.0.0.1]) by localhost (Postfix) with SMTP id A59DDB58022 for ; Tue, 8 Nov 2011 09:57:22 +0100 (CET) Received: from ftrdsmtp2.rd.francetelecom.fr (unknown [10.192.128.47]) by p-mail2.rd.francetelecom.com (Postfix) with ESMTP id A0B65B5801B for ; Tue, 8 Nov 2011 09:57:22 +0100 (CET) Received: from ftrdmel1.rd.francetelecom.fr ([10.192.128.40]) by ftrdsmtp2.rd.francetelecom.fr with Microsoft SMTPSVC(6.0.3790.4675); Tue, 8 Nov 2011 09:47:14 +0100 X-MimeOLE: Produced By Microsoft Exchange V6.5 Received: from 10.193.21.179 ([10.193.21.179]) by ftrdmel1.rd.francetelecom.fr ([10.192.128.40]) via Exchange Front-End Server owa.rd.francetelecom.fr ([10.192.128.53]) with Microsoft Exchange Server HTTP-DAV ; Tue, 8 Nov 2011 08:47:14 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Organization: France Telecom Orange user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 Content-class: urn:content-classes:message Date: Tue, 8 Nov 2011 09:47:25 +0100 Message-ID: In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 Thread-Index: Acyd8wMgm2wyoCqURueMIEHhjZP1PA== References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> From: To: X-OriginalArrivalTime: 08 Nov 2011 08:47:14.0239 (UTC) FILETIME=[0326CCF0:01CC9DF3] Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." 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Tue, 08 Nov 2011 17:57:58 +0800 (CST) Received: from szxeml208-edg.china.huawei.com ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.1.9-GA) with ESMTP id AEX21377; Tue, 08 Nov 2011 17:57:57 +0800 Received: from SZXEML412-HUB.china.huawei.com (10.82.67.91) by szxeml208-edg.china.huawei.com (172.24.2.60) with Microsoft SMTP Server (TLS) id 14.1.270.1; Tue, 08 Nov 2011 17:57:53 +0800 Received: from SZXEML525-MBS.china.huawei.com ([169.254.8.177]) by szxeml412-hub.china.huawei.com ([10.82.67.91]) with mapi id 14.01.0270.001; Tue, 08 Nov 2011 17:57:49 +0800 Date: Tue, 08 Nov 2011 09:57:48 +0000 From: Xuxiaohu In-reply-to: X-Originating-IP: [10.108.4.59] To: "thomas.morin@orange.com" , "armd@ietf.org" Message-id: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE7477C7@szxeml525-mbs.china.huawei.com> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-language: zh-CN Content-transfer-encoding: base64 Accept-Language: zh-CN, en-US Thread-topic: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 Thread-index: AQHMnfMMcGthMLssuEO+kgLmfUXVupWivP3A X-MS-Has-Attach: X-MS-TNEF-Correlator: X-CFilter-Loop: Reflected References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." 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cm1kIG1haWxpbmcgbGlzdA0KPiBhcm1kQGlldGYub3JnDQo+IGh0dHBzOi8vd3d3LmlldGYub3Jn L21haWxtYW4vbGlzdGluZm8vYXJtZA0K From thomas.morin@orange.com Tue Nov 8 06:44:41 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F2EC821F8CC9 for ; Tue, 8 Nov 2011 06:44:40 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.249 X-Spam-Level: X-Spam-Status: No, score=-3.249 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HELO_EQ_FR=0.35, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 17lMCAxEn0C7 for ; Tue, 8 Nov 2011 06:44:40 -0800 (PST) Received: from p-mail2.rd.francetelecom.com (p-mail2.rd.francetelecom.com [195.101.245.16]) by ietfa.amsl.com (Postfix) with ESMTP id 0C20821F8CC5 for ; Tue, 8 Nov 2011 06:44:40 -0800 (PST) Received: from 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Content-class: urn:content-classes:message Date: Tue, 8 Nov 2011 15:44:50 +0100 Message-ID: In-Reply-To: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE7477C7@szxeml525-mbs.china.huawei.com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 Thread-Index: AcyeJPCzx8mYKyaFSWqd9TO7P46lKA== References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE7477C7@szxeml525-mbs.china.huawei.com> From: To: X-OriginalArrivalTime: 08 Nov 2011 14:44:38.0307 (UTC) FILETIME=[F0CFE730:01CC9E24] Cc: armd@ietf.org Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud 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dy5pZXRmLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2FybWQNCj4+IF9fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fDQo+PiBhcm1kIG1haWxpbmcgbGlzdA0KPj4gYXJt ZEBpZXRmLm9yZw0KPj4gaHR0cHM6Ly93d3cuaWV0Zi5vcmcvbWFpbG1hbi9saXN0aW5mby9hcm1k DQo= From linda.dunbar@huawei.com Tue Nov 8 07:22:16 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 35A0C21F85DB for ; Tue, 8 Nov 2011 07:22:16 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.403 X-Spam-Level: X-Spam-Status: No, score=-6.403 tagged_above=-999 required=5 tests=[AWL=0.196, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id sCgdvjVhQz+m for ; Tue, 8 Nov 2011 07:22:15 -0800 (PST) Received: from usaga02-in.huawei.com (usaga02-in.huawei.com [206.16.17.70]) by 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From: Linda Dunbar In-reply-to: X-Originating-IP: [10.192.11.155] To: "thomas.morin@orange.com" , Xuxiaohu Message-id: <4A95BA014132FF49AE685FAB4B9F17F6120BCFE0@dfweml506-mbx> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-language: en-US Content-transfer-encoding: base64 Accept-Language: en-US Thread-topic: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 Thread-index: AQHMniVdZjZw3DVxykKbX39LPlz2TJWjFDsg X-MS-Has-Attach: X-MS-TNEF-Correlator: References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE7477C7@szxeml525-mbs.china.huawei.com> Cc: "armd@ietf.org" Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data 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Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0D7DD11E8095 for ; Tue, 8 Nov 2011 07:40:45 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.411 X-Spam-Level: X-Spam-Status: No, score=-6.411 tagged_above=-999 required=5 tests=[AWL=0.188, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8npdweNb9uQ5 for ; Tue, 8 Nov 2011 07:40:44 -0800 (PST) Received: from usaga02-in.huawei.com (usaga02-in.huawei.com [206.16.17.70]) by ietfa.amsl.com (Postfix) with ESMTP id 5B6BB11E8083 for ; Tue, 8 Nov 2011 07:40:44 -0800 (PST) Received: from huawei.com (localhost [127.0.0.1]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUC001KALTGMU@usaga02-in.huawei.com> for armd@ietf.org; Tue, 08 Nov 2011 09:32:04 -0600 (CST) Received: from dfweml202-edg.china.huawei.com ([172.18.4.104]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTPS id <0LUC00G0TLTGPM@usaga02-in.huawei.com> for armd@ietf.org; Tue, 08 Nov 2011 09:32:04 -0600 (CST) Received: from DFWEML404-HUB.china.huawei.com (10.193.5.203) by dfweml202-edg.china.huawei.com (172.18.9.108) with Microsoft SMTP Server (TLS) id 14.1.270.1; Tue, 08 Nov 2011 07:32:04 -0800 Received: from DFWEML506-MBX.china.huawei.com ([10.124.31.111]) by dfweml404-hub.china.huawei.com ([10.193.5.203]) with mapi id 14.01.0270.001; Tue, 08 Nov 2011 07:31:48 -0800 Date: Tue, 08 Nov 2011 15:31:52 +0000 From: Linda Dunbar In-reply-to: X-Originating-IP: [10.192.11.155] To: "thomas.morin@orange.com" , "armd@ietf.org" Message-id: <4A95BA014132FF49AE685FAB4B9F17F6120BD01D@dfweml506-mbx> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-language: en-US Content-transfer-encoding: base64 Accept-Language: en-US, zh-CN Thread-topic: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 Thread-index: AQHMnfMLxgfxU4gzHEa/RkGz1/Y1JJWjFzrw X-MS-Has-Attach: X-MS-TNEF-Correlator: References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." 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YXJtZA0K From linda.dunbar@huawei.com Tue Nov 8 07:40:45 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5FD6F11E807F for ; Tue, 8 Nov 2011 07:40:45 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.419 X-Spam-Level: X-Spam-Status: No, score=-6.419 tagged_above=-999 required=5 tests=[AWL=0.180, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cXuYHTgXf6ly for ; Tue, 8 Nov 2011 07:40:44 -0800 (PST) Received: from usaga02-in.huawei.com (usaga02-in.huawei.com [206.16.17.70]) by ietfa.amsl.com (Postfix) with ESMTP id 8254711E808A for ; Tue, 8 Nov 2011 07:40:44 -0800 (PST) Received: from huawei.com (localhost [127.0.0.1]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUC001YBM7TMU@usaga02-in.huawei.com> for armd@ietf.org; Tue, 08 Nov 2011 09:40:41 -0600 (CST) Received: from dfweml201-edg.china.huawei.com ([172.18.4.104]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTPS id <0LUC00GP1M7TPM@usaga02-in.huawei.com> for armd@ietf.org; Tue, 08 Nov 2011 09:40:41 -0600 (CST) Received: from DFWEML402-HUB.china.huawei.com (10.193.5.102) by dfweml201-edg.china.huawei.com (172.18.9.107) with Microsoft SMTP Server (TLS) id 14.1.270.1; Tue, 08 Nov 2011 07:40:37 -0800 Received: from DFWEML506-MBX.china.huawei.com ([10.124.31.111]) by DFWEML402-HUB.china.huawei.com ([::1]) with mapi id 14.01.0270.001; Tue, 08 Nov 2011 07:40:31 -0800 Date: Tue, 08 Nov 2011 15:40:29 +0000 From: Linda Dunbar In-reply-to: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE7477C7@szxeml525-mbs.china.huawei.com> X-Originating-IP: [10.192.11.155] To: Xuxiaohu , "thomas.morin@orange.com" , "armd@ietf.org" Message-id: <4A95BA014132FF49AE685FAB4B9F17F6120BD044@dfweml506-mbx> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-language: en-US Content-transfer-encoding: base64 Accept-Language: en-US Thread-topic: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 Thread-index: AQHMnfMLxgfxU4gzHEa/RkGz1/Y1JJWjQ/MA///XX4A= X-MS-Has-Attach: X-MS-TNEF-Correlator: References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE7477C7@szxeml525-mbs.china.huawei.com> Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." 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dHRwczovL3d3dy5pZXRmLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2FybWQNCg== From bschlies@cisco.com Tue Nov 8 12:35:05 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 41FF011E80C9 for ; Tue, 8 Nov 2011 12:35:05 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.265 X-Spam-Level: X-Spam-Status: No, score=-6.265 tagged_above=-999 required=5 tests=[AWL=0.333, BAYES_00=-2.599, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PDHVT3ykoYFA for ; Tue, 8 Nov 2011 12:35:04 -0800 (PST) Received: from mtv-iport-1.cisco.com (mtv-iport-1.cisco.com [173.36.130.12]) by ietfa.amsl.com (Postfix) with ESMTP id 1625C11E80F8 for ; Tue, 8 Nov 2011 12:35:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=bschlies@cisco.com; l=20737; q=dns/txt; s=iport; t=1320784504; x=1321994104; h=subject:mime-version:from:in-reply-to:date:cc:message-id: references:to; bh=1ujCFMbkMzrY2FmhOi1ynm2mPAnGJM2iVOV0N+18xjw=; b=MlBmeRtmv7S6QqbNekg6jlzafhs3xHw4ZjmudEl2Q0cT41B/TRfmpyQj +LpmTNUj7diGdjDxjhjIUy2Vs5UN17cp6Gyr9Z0yXA65N8ioAUbm7EryS wDjs2LW7ug+OZn+9NzdEfhnSLup83yfSeuSd4/LyuR+geAOpv5xDEnC1l k=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AsEAAKKRuU6rRDoJ/2dsb2JhbABDgk2XUIgKAYZTgSaBBYFyAQEBAwESAVsLBQsLEQQBASEHB0YJCAYTCRIHh2AImF0BnnaISmMEiAuMFpIN X-IronPort-AV: E=Sophos;i="4.69,478,1315180800"; d="scan'208,217";a="11540558" Received: from mtv-core-4.cisco.com ([171.68.58.9]) by mtv-iport-1.cisco.com with ESMTP; 08 Nov 2011 20:35:03 +0000 Received: from sjc-bschlies-89112.cisco.com (sjc-bschlies-89112.cisco.com [10.20.217.237]) by mtv-core-4.cisco.com (8.14.3/8.14.3) with ESMTP id pA8KZ2GM010754; Tue, 8 Nov 2011 20:35:03 GMT Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-16-1027402576 From: Benson Schliesser In-Reply-To: Date: Tue, 8 Nov 2011 14:35:02 -0600 Message-Id: <134F1138-074D-4A1B-8EA3-6E555B66D418@cisco.com> References: <2591DB96-1968-41CC-8CF7-A84EC852697D@cisco.com> To: "Shah, Himanshu" X-Mailer: Apple Mail (2.1084) Cc: armd@ietf.org Subject: Re: [armd] draft ARMD agenda for IETF-82 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Nov 2011 20:35:05 -0000 --Apple-Mail-16-1027402576 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Hi, Himanshu. As I described in our offline email discussion, it is not appropriate = for ARMD to develop solutions. It's not "a dirty word", it is simply = not allowed within the scope of the Ops Area. This is an explicit = instruction from our Area Director. And this restriction is reflected = in our charter. Thus, my response (to your request) is unchanged. Please note that this isn't a criticism of your draft. In fact, I = recommend that all ARMD participants read it, and I'd like to make sure = that it finds an appropriate home for further development. As for moving the WG forward, we (Linda and I) will be discussing this = topic at the IETF-82 meeting. Before then, I will post my thoughts to = the ARMD list for discussion. I hope that you'll provide input. Cheers, -Benson On Nov 4, 2011, at 6:18 PM, Shah, Himanshu wrote: > Hi Ben and others =96 > =20 > We did request a timeslot to present a light-weight =91solution=92. > I know =91solution=92 is a dirty word for the ARMD WG and we had some > offline email discussions about this. Despite that, we would like a > chance to present and let participants decide if fatigue has set in = with > =91problem discussions=92 and like to move on to solution phase. > Perhaps this will serve as a springboard for moving the ARMD WG to = another area?? > =20 > =20 > So here is the request =96 20min > Nabil Bitar (VZ) to present - = http://www.ietf.org/id/draft-shah-armd-arp-reduction-02.txt > =20 > Thanks, > himanshu > =20 > =20 > =20 >=20 > > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf = Of Benson Schliesser > Sent: Thursday, November 03, 2011 2:57 PM > To: armd@ietf.org > Subject: [armd] draft ARMD agenda for IETF-82 > =20 > The draft agenda for ARMD at the IETF-82 meeting has been posted at = http://www.ietf.org/proceedings/82/agenda/armd.html > =20 > ARMD Working Group - IETF 82 - Agenda > Address Resolution for Massive numbers of hosts in the Data center = (ARMD) > Location: 101B meeting room, Taipei International Convention Center = (TICC), Taipei, Taiwan > Time: 15-Nov-2011, 1710-1810 - Tuesday, Afternoon Session III > Chairs: Benson Schliesser (bschlies@cisco.com) & Linda Dunbar = (linda.dunbar@huawei.com) > Jabber: armd@jabber.ietf.org > URL: http://tools.ietf.org/wg/armd/ > =20 > A. Meeting Administrivia (chairs - 05 min) > Welcome > Mailing list and URL > Minutes Scribe > Jabber Scribe > Blue Sheets > =20 > B. Data Center Reference Architectures (Manish Karir - 15 min) > draft-armd-datacenter-reference-arch-01 > =20 > C. Problem Statement for ARMD (Thomas Narten - 15 min) > draft-ietf-armd-problem-statement-00 > =20 > D. ARMD Work Plan (chairs - 20 min) > =20 > Version 0, published 03-Nov-2011 > =20 > =20 >=20 >=20 --Apple-Mail-16-1027402576 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252
Hi, Himanshu.

As I = described in our offline email discussion, it is not appropriate for = ARMD to develop solutions.  It's not "a dirty word", it is simply = not allowed within the scope of the Ops Area.  This is an explicit = instruction from our Area Director.  And this restriction is = reflected in our charter.  Thus, my response (to your request) is = unchanged.

Please note that this isn't a = criticism of your draft.  In fact, I recommend that all ARMD = participants read it, and I'd like to make sure that it finds an = appropriate home for further development.

As = for moving the WG forward, we (Linda and I) will be discussing this = topic at the IETF-82 meeting.  Before then, I will post my thoughts = to the ARMD list for discussion.  I hope that you'll provide = input.

Cheers,
-Benson



On Nov 4, 2011, at 6:18 PM, Shah, = Himanshu wrote:

Hi Ben and others = =96
 
We did request a = timeslot to present a light-weight = =91solution=92.
I know =91solution=92 is a dirty word for the ARMD = WG and we had some
offline email discussions about this. Despite that, = we would like a
chance to present and let participants decide if = fatigue has set in with
=91problem discussions=92 = and like to move on to solution phase.
Perhaps this will serve = as a springboard for moving the ARMD WG to another = area??
 
So here is the request =96 = 20min
Nabil Bitar (VZ) to present - Thanks,
 armd-bounces@ietf.org [mailto:armd-bounces@ietf.org= ] On Behalf Of Benson = Schliesser
Sent: Thursday, November 03, 2011 = 2:57 PM
To: armd@ietf.org
Subject: [armd] draft ARMD agenda = for IETF-82
The draft agenda for ARMD at the IETF-82 meeting has been = posted at  



= --Apple-Mail-16-1027402576-- From liyizhou@huawei.com Tue Nov 8 18:05:52 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A04D811E8091 for ; Tue, 8 Nov 2011 18:05:52 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.599 X-Spam-Level: X-Spam-Status: No, score=-6.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZNXBNDzvU59R for ; Tue, 8 Nov 2011 18:05:51 -0800 (PST) Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [119.145.14.67]) by ietfa.amsl.com (Postfix) with ESMTP id 45F4011E8082 for ; Tue, 8 Nov 2011 18:05:51 -0800 (PST) Received: from huawei.com (szxga04-in [172.24.2.12]) by szxga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUD007GNF4SUQ@szxga04-in.huawei.com> for armd@ietf.org; Wed, 09 Nov 2011 10:05:17 +0800 (CST) Received: from szxrg01-dlp.huawei.com ([172.24.2.119]) by szxga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUD00E1VF4S7M@szxga04-in.huawei.com> for armd@ietf.org; Wed, 09 Nov 2011 10:05:16 +0800 (CST) Received: from szxeml203-edg.china.huawei.com ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.1.9-GA) with ESMTP id AEX38628; Wed, 09 Nov 2011 10:04:18 +0800 Received: from SZXEML406-HUB.china.huawei.com (10.82.67.93) by szxeml203-edg.china.huawei.com (172.24.2.55) with Microsoft SMTP Server (TLS) id 14.1.270.1; Wed, 09 Nov 2011 10:04:13 +0800 Received: from l63746 (10.138.41.136) by smtpscn.huawei.com (10.82.67.93) with Microsoft SMTP Server (TLS) id 14.1.270.1; Wed, 09 Nov 2011 10:04:08 +0800 Date: Wed, 09 Nov 2011 10:04:07 +0800 From: Yizhou Li In-reply-to: <4A95BA014132FF49AE685FAB4B9F17F6120BD044@dfweml506-mbx> X-Originating-IP: [10.138.41.136] To: 'Linda Dunbar' , 'Xuxiaohu' , thomas.morin@orange.com, armd@ietf.org Message-id: <00a701cc9e83$dde5efc0$99b1cf40$@com> MIME-version: 1.0 X-Mailer: Microsoft Office Outlook 12.0 Content-type: text/plain; charset=UTF-8 Content-language: zh-cn Content-transfer-encoding: quoted-printable Thread-index: AQHMnfMLxgfxU4gzHEa/RkGz1/Y1JJWjQ/MA///XX4CAAKnIMA== X-CFilter-Loop: Reflected References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE7477C7@szxeml525-mbs.china.huawei.com> <4A95BA014132FF49AE685FAB4B9F17F6120BD044@dfweml506-mbx> Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Nov 2011 02:05:52 -0000 I think it is worthwhile to mention ARP proxy term and its ambiguity in = the problem statement for the following reasons.=20 1. It is ARP related and is a common term people always talk about. 2. It has different interpretations which affects ARP performance = differently. "Proxy ARP" appears in problem statement once and it takes the second = interpretation in Linda's email rather than that from RFC1027.=20 Yizhou -----Original Message----- From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of = Linda Dunbar Sent: Tuesday, November 08, 2011 11:40 PM To: Xuxiaohu; thomas.morin@orange.com; armd@ietf.org Subject: Re: [armd] What is the proper definition for Broadcast Domain? = which is used in draft-ietf-armd-problem-statement-00 The term =E2=80=9CARP Proxy=E2=80=9D is a loaded phrase, with different = interpretations depending on vendors or environments. RFC1027=E2=80=99s = ARP Proxy is for Gateway to return its own MAC address on behalf of = target host, whereas some ARP Proxy approach is for ToR to intercept ARP = requests and return target hosts=E2=80=99 MAC if it is present in = ToR=E2=80=99s ARP cache. [RFC1027] was developed prior to the concepts of VLANs. It is for = gateway to return its own MAC when the requesting host doesn't have = subnet supported.=20 Unknown DA flooding is a pure layer 2 approach for a data frame to reach = its destination when the switch doesn't have the DA in its FDB. Let's = not mix it with address resolution.=20 Linda=20 > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf = Of > Xuxiaohu > Sent: Tuesday, November 08, 2011 3:58 AM > To: thomas.morin@orange.com; armd@ietf.org > Subject: Re: [armd] What is the proper definition for Broadcast = Domain? > which is used in draft-ietf-armd-problem-statement-00 >=20 > Hi Thomas, >=20 > > -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6----- > > =E5=8F=91=E4=BB=B6=E4=BA=BA: armd-bounces@ietf.org = [mailto:armd-bounces@ietf.org] =E4=BB=A3=E8=A1=A8 > > thomas.morin@orange.com > > =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: = 2011=E5=B9=B411=E6=9C=888=E6=97=A5 16:47 > > =E6=94=B6=E4=BB=B6=E4=BA=BA: armd@ietf.org > > =E4=B8=BB=E9=A2=98: Re: [armd] What is the proper definition for = Broadcast Domain? > which is > > used in draft-ietf-armd-problem-statement-00 > > > > Hi, > > > > In the context of ARMD, we could also find it useful to distinguish > the > > broadcast domain (as defined below) and the "ARP/ND domain", which = we > > could define as the set of links and devices that are traversed by = an > > ARP/ND request and/or its reply. Those are distinct things, = generally > > speaking: if for instance ARP proxying is used, the former will be a > > strict superset of the latter. >=20 > If the ARP proxy [RFC 1027] is used, both the unknown unicast = broadcast > domain and the ARP broadcast domain are confined. In addition, the MAC > learning domain is also confined. For more details, please see Virtual > Subnet (http://tools.ietf.org/html/draft-xu-virtual-subnet-06). >=20 > Of course, if what you mean is ARP cache by saying ARP proxying (see > http://tools.ietf.org/html/draft-shah-armd-arp-reduction-02), the ARP > broadcast domain is confined only when there does exist an ARP cache > entry for the requested host. >=20 > In a word, the ARP proxy return its own MAC address while the ARP = cache > return the real MAC of the requested host. >=20 > Best regards, > Xiaohu >=20 > > Then draft-ietf-armd-problem-statement could be revised to talks > about > > ARP/ND domain in places where it would be more precise than = broadcast > > domain. > > > > Thanks, > > > > -Thomas > > > > > > Donald Eastlake: > > > You might have an 802.1D network without VLANs so I would suggest, > as > > > a general definition, something like: > > > > > > "The set of all links and switches that are traversed by a > broadcast > > > frame, that is, a frame > > > with the broadcast destination L2 address. This is normally > confined > > > to a single VLAN." > > > > > > Thanks, > > > Donald > > > = =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 > > > Donald E. Eastlake 3rd +1-508-333-2270 (cell) > > > 155 Beaver Street, Milford, MA 01757 USA > > > d3e3e3@gmail.com > > > > > > > > > On Thu, Oct 27, 2011 at 5:23 PM, Linda > Dunbar > > wrote: > > >> draft-ietf-armd-problem-statement-00 has the following definition > for > > >> Broadcast Domain: > > >> > > >> > > >> > > >> Broadcast Domain: The set of all links and switches that are > > >> > > >> traversed in order to reach all nodes that are members of a given > > >> > > >> L2 domain. For example, when sending a broadcast packet on a > > >> > > >> VLAN, the domain would include all the links and switches that = the > > >> > > >> packet traverses when broadcast traffic is sent. > > >> > > >> > > >> > > >> The phrase of =E2=80=9Care members of a given L2 domain=E2=80=9D = is a bit > confusing > > because > > >> L2 domain could have up to 4095 VLANS, with each one being its = own > > broadcast > > >> domain. > > >> > > >> > > >> > > >> Therefore, I think it is more accurate to say =E2=80=9CThe set of = all > links and > > >> switches that are traversed in order to reach all nodes that are > members of > > >> a given VLAN of a L2 domain.=E2=80=9D > > >> > > >> > > >> > > >> Any other suggestions? > > >> > > >> > > >> > > >> Linda > > >> > > >> _______________________________________________ > > >> armd mailing list > > >> armd@ietf.org > > >> https://www.ietf.org/mailman/listinfo/armd > > >> > > >> > > > _______________________________________________ > > > armd mailing list > > > armd@ietf.org > > > https://www.ietf.org/mailman/listinfo/armd > > _______________________________________________ > > armd mailing list > > armd@ietf.org > > https://www.ietf.org/mailman/listinfo/armd > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd _______________________________________________ armd mailing list armd@ietf.org https://www.ietf.org/mailman/listinfo/armd From skh@ndzh.com Wed Nov 9 08:24:17 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E4B1921F8C88 for ; Wed, 9 Nov 2011 08:24:17 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.018 X-Spam-Level: X-Spam-Status: No, score=0.018 tagged_above=-999 required=5 tests=[AWL=0.001, BAYES_00=-2.599, FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888, HELO_MISMATCH_COM=0.553, HOST_MISMATCH_NET=0.311, RDNS_DYNAMIC=0.1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id gYcjjetvoDnd for ; Wed, 9 Nov 2011 08:24:13 -0800 (PST) Received: from hickoryhill-consulting.com (63-208-161-201.digitalrealm.net [63.208.161.201]) by ietfa.amsl.com (Postfix) with ESMTP id 4CF0421F8B0D for ; Wed, 9 Nov 2011 08:24:13 -0800 (PST) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=63.133.138.150; Received: from SKHPERSONALLT (unverified [63.133.138.150]) by hickoryhill-consulting.com (SurgeMail 5.2a) with ESMTP id 2825040-1945496 for multiple; Wed, 09 Nov 2011 11:24:03 -0500 From: "Susan Hares" To: , References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE7477C7@szxeml525-mbs.china.huawei.com> In-Reply-To: Date: Wed, 9 Nov 2011 11:24:08 -0500 Message-ID: <004a01cc9efc$01f396b0$05dac410$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcyeJPCzx8mYKyaFSWqd9TO7P46lKAA1t4+A Content-Language: en-us X-Authenticated-User: skh@ndzh.com Cc: armd@ietf.org Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Nov 2011 16:24:18 -0000 Thomas:=20 Are you arguing for both definitions (Donald's) and ND/ARP domain or = both? I'm just a bit confused by your request. Sue=20 -----Original Message----- From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of = thomas.morin@orange.com Sent: Tuesday, November 08, 2011 9:45 AM To: xuxiaohu@huawei.com Cc: armd@ietf.org Subject: Re: [armd] What is the proper definition for Broadcast Domain? = which is used in draft-ietf-armd-problem-statement-00 Hi Xuxiaohu, Yes, you are correct that we may have different scopes for broadcast=20 traffic, unknown unicast, ARP/ND request, or even multicast... I would=20 add that for some of these, the scope is not even constant over time=20 (e.g. unknown unicast is not unknown for every device, and not for = ever). My point was that, even though Donald's definition of a broadcast domain = looks very reasonable to me, it strikes me that the "domain" which=20 draft-ietf-armd-problem-statement should talk about is not this domain,=20 but the domain in which ARP or ND spreads. -Thomas 2011-11-08, Xuxiaohu: >Thomas: >> In the context of ARMD, we could also find it useful to distinguish = the >> broadcast domain (as defined below) and the "ARP/ND domain", which we >> could define as the set of links and devices that are traversed by an >> ARP/ND request and/or its reply. Those are distinct things, generally >> speaking: if for instance ARP proxying is used, the former will be a >> strict superset of the latter. > > If the ARP proxy [RFC 1027] is used, both the unknown unicast > broadcast domain and the ARP broadcast domain are confined.In = addition, > the MAC learning domain is also confined. For more details, please see > Virtual Subnet = (http://tools.ietf.org/html/draft-xu-virtual-subnet-06). > > Of course, if what you mean is ARP cache by saying ARP proxying (see > http://tools.ietf.org/html/draft-shah-armd-arp-reduction-02), the ARP > broadcast domain is confined only when there does exist an ARP cache > entry for the requested host. > > In a word, the ARP proxy return its own MAC address while the ARP = cache > return the real MAC of the requested host. > > >> Donald Eastlake: >>> You might have an 802.1D network without VLANs so I would suggest, = as >>> a general definition, something like: >>> >>> "The set of all links and switches that are traversed by a broadcast >>> frame, that is, a frame >>> with the broadcast destination L2 address. This is normally confined >>> to a single VLAN." >>> >>> Thanks, >>> Donald >>> = =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 >>> Donald E. Eastlake 3rd +1-508-333-2270 (cell) >>> 155 Beaver Street, Milford, MA 01757 USA >>> d3e3e3@gmail.com >>> >>> >>> On Thu, Oct 27, 2011 at 5:23 PM, Linda = Dunbar >> wrote: >>>> draft-ietf-armd-problem-statement-00 has the following definition = for >>>> Broadcast Domain: >>>> >>>> >>>> >>>> Broadcast Domain: The set of all links and switches that are >>>> >>>> traversed in order to reach all nodes that are members of a given >>>> >>>> L2 domain. For example, when sending a broadcast packet on a >>>> >>>> VLAN, the domain would include all the links and switches that the >>>> >>>> packet traverses when broadcast traffic is sent. >>>> >>>> >>>> >>>> The phrase of =E2=80=9Care members of a given L2 domain=E2=80=9D is = a bit confusing >> because >>>> L2 domain could have up to 4095 VLANS, with each one being its own >> broadcast >>>> domain. >>>> >>>> >>>> >>>> Therefore, I think it is more accurate to say =E2=80=9CThe set of = all links and >>>> switches that are traversed in order to reach all nodes that are = members of >>>> a given VLAN of a L2 domain.=E2=80=9D >>>> >>>> >>>> >>>> Any other suggestions? >>>> >>>> >>>> >>>> Linda >>>> >>>> _______________________________________________ >>>> armd mailing list >>>> armd@ietf.org >>>> https://www.ietf.org/mailman/listinfo/armd >>>> >>>> >>> _______________________________________________ >>> armd mailing list >>> armd@ietf.org >>> https://www.ietf.org/mailman/listinfo/armd >> _______________________________________________ >> armd mailing list >> armd@ietf.org >> https://www.ietf.org/mailman/listinfo/armd _______________________________________________ armd mailing list armd@ietf.org https://www.ietf.org/mailman/listinfo/armd From pedro.r.marques@gmail.com Wed Nov 9 11:52:02 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EEB8C21F848C; Wed, 9 Nov 2011 11:52:02 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.61 X-Spam-Level: X-Spam-Status: No, score=-2.61 tagged_above=-999 required=5 tests=[AWL=0.389, BAYES_00=-2.599, J_CHICKENPOX_32=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2+0pq750uVCR; Wed, 9 Nov 2011 11:52:02 -0800 (PST) Received: from mail-iy0-f172.google.com (mail-iy0-f172.google.com [209.85.210.172]) by ietfa.amsl.com (Postfix) with ESMTP id 47F9621F848A; Wed, 9 Nov 2011 11:52:02 -0800 (PST) Received: by iaeo4 with SMTP id o4so2690124iae.31 for ; Wed, 09 Nov 2011 11:52:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=a79ejb1F58MgUgbAyMDMUHkCJYubn5OSVkDuL0yNKbs=; b=XrppjTzzMJG+jmuZ3DPrM1xm5EBhM+vIHQEBU9OPx74qEhYR9ITIqiWuzRJwGZGfNA UWuYx5MWFg7eEZ13QkN/KocjK+Cyz6dfRhxXW6R2Zz9zbopnnJH2M7q9EVIbj5tLFv2S ds0azcAWRSkK0tOBbH9G+gA3ETLr6ZdzhPmL8= MIME-Version: 1.0 Received: by 10.231.83.201 with SMTP id g9mr1053454ibl.68.1320868320096; Wed, 09 Nov 2011 11:52:00 -0800 (PST) Received: by 10.231.12.2 with HTTP; Wed, 9 Nov 2011 11:52:00 -0800 (PST) In-Reply-To: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> Date: Wed, 9 Nov 2011 11:52:00 -0800 Message-ID: From: Pedro Marques To: Linda Dunbar Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Wed, 09 Nov 2011 12:05:38 -0800 Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , armd@ietf.org Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Nov 2011 19:52:03 -0000 Linda, I'd like to point out that the problem does not need to be solved if only IP connectivity is required. This I-D: http://tools.ietf.org/html/draft-marques-l3vpn-end-system-02 describes a solution in which address resolution is not required irrespective of the location of the traffic destination. Simply put, traffic can be routed at each hop. As per previous threads in this list, the concept of subnet which is of no practical usefulness in this space. Since VMs can be randomly distributed across the network the subnet does not provide any information aggregation value. Thus there is no need to do address resolution. Pedro. On Wed, Nov 9, 2011 at 11:31 AM, Linda Dunbar wro= te: > For those of you who touch upon Data Center networking or server > virtualization, be it Overlay, VPN4DC, or Application/Software driven > Controller for Data Center, Address Resolution is something Data Center > Gateways =A0will encounter because hosts/applications in data centers do > communicate with peers which are not in the same Overlay, outside the VPN > domain, or from general public. ARMD has published its WG problem stateme= nt > draft. Your comments and suggestions are appreciated (send to > armd@ietf.org). > > > > Thanks, Linda Dunbar > > > > -------------------------------------------------------------------------= ---------- > > > > > > A New Internet-Draft is available from the on-line Internet-Drafts > directories. This draft is a work item of the Address Resolution for Mass= ive > numbers of hosts in the Data center Working Group of the IETF. > > > > =A0=A0=A0=A0=A0=A0=A0 Title=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : Problem State= ment for ARMD > > =A0=A0=A0=A0=A0=A0=A0 Author(s)=A0=A0=A0=A0=A0=A0 : Thomas Narten > > =A0=A0=A0=A0=A0=A0=A0 Filename=A0=A0=A0=A0=A0=A0=A0 : draft-ietf-armd-pro= blem-statement-00.txt > > =A0=A0=A0=A0=A0=A0=A0 Pages=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : 11 > > =A0=A0=A0=A0=A0=A0=A0 Date=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : 2011-10-17 > > > > =A0=A0 This document examines issues related to the massive scaling of da= ta > > =A0=A0 centers.=A0 Our initial scope is relatively narrow.=A0 Specificall= y, we > > =A0=A0 focus on address resolution (ARP and ND) within the data center. > > > > > > A URL for this Internet-Draft is: > > http://www.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.= txt > > > > Internet-Drafts are also available by anonymous FTP at: > > ftp://ftp.ietf.org/internet-drafts/ > > > > This Internet-Draft can be retrieved at: > > ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.t= xt > > From linda.dunbar@huawei.com Wed Nov 9 12:12:26 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8DB191F0C43; Wed, 9 Nov 2011 12:12:26 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.821 X-Spam-Level: X-Spam-Status: No, score=-5.821 tagged_above=-999 required=5 tests=[AWL=-0.422, BAYES_00=-2.599, J_CHICKENPOX_13=0.6, J_CHICKENPOX_32=0.6, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kj6hzNo6IzUQ; Wed, 9 Nov 2011 12:12:25 -0800 (PST) Received: from usaga04-in.huawei.com (usaga04-in.huawei.com [206.16.17.180]) by ietfa.amsl.com (Postfix) with ESMTP id DDE341F0C41; Wed, 9 Nov 2011 12:12:25 -0800 (PST) Received: from huawei.com (usaga04-in [172.18.4.101]) by usaga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUE00B35TGH9K@usaga04-in.huawei.com>; Wed, 09 Nov 2011 14:12:18 -0600 (CST) Received: from dfweml201-edg.china.huawei.com ([172.18.4.104]) by usaga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUE0096HTGE0G@usaga04-in.huawei.com>; Wed, 09 Nov 2011 14:12:17 -0600 (CST) Received: from DFWEML404-HUB.china.huawei.com (10.193.5.203) by dfweml201-edg.china.huawei.com (172.18.9.107) with Microsoft SMTP Server (TLS) id 14.1.270.1; Wed, 09 Nov 2011 12:12:11 -0800 Received: from DFWEML506-MBX.china.huawei.com ([10.124.31.111]) by dfweml404-hub.china.huawei.com ([10.193.5.203]) with mapi id 14.01.0270.001; Wed, 09 Nov 2011 12:11:58 -0800 Date: Wed, 09 Nov 2011 20:12:08 +0000 From: Linda Dunbar In-reply-to: X-Originating-IP: [10.192.11.155] To: Pedro Marques Message-id: <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-language: en-US Content-transfer-encoding: quoted-printable Accept-Language: en-US, zh-CN Thread-topic: Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-index: AQHMnxkRlZozan+p5EmwsYAz13twApWk988g X-MS-Has-Attach: X-MS-TNEF-Correlator: References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Nov 2011 20:12:26 -0000 Pedro,=20 You are absolutely right that there is no ARP/ND scaling issue if IP can be= extended to hosts. Even if IP can be extended to Access switches, there is= not much ARP/ND issues.=20 The draft lists down several common data center network designs, and states= that some of the designs don't have ARP/ND scaling issues (but may have ot= her issues for data centers).=20 That is why I encourage people to read the draft and provides comments.=20 Linda=20 > -----Original Message----- > From: Pedro Marques [mailto:pedro.r.marques@gmail.com] > Sent: Wednesday, November 09, 2011 1:52 PM > To: Linda Dunbar > Cc: l2vpn@ietf.org; L3VPN WG mailing list; sdnp@lucidvision.com; > armd@ietf.org > Subject: Re: Need your action to review draft-ietf-armd-problem- > statement-00.txt >=20 > Linda, > I'd like to point out that the problem does not need to be solved if > only IP connectivity is required. This I-D: > http://tools.ietf.org/html/draft-marques-l3vpn-end-system-02 describes > a solution in which address resolution is not required irrespective of > the location of the traffic destination. Simply put, traffic can be > routed at each hop. >=20 > As per previous threads in this list, the concept of subnet which is > of no practical usefulness in this space. Since VMs can be randomly > distributed across the network the subnet does not provide any > information aggregation value. Thus there is no need to do address > resolution. >=20 > Pedro. >=20 > On Wed, Nov 9, 2011 at 11:31 AM, Linda Dunbar > wrote: > > For those of you who touch upon Data Center networking or server > > virtualization, be it Overlay, VPN4DC, or Application/Software driven > > Controller for Data Center, Address Resolution is something Data > Center > > Gateways =A0will encounter because hosts/applications in data centers > do > > communicate with peers which are not in the same Overlay, outside the > VPN > > domain, or from general public. ARMD has published its WG problem > statement > > draft. Your comments and suggestions are appreciated (send to > > armd@ietf.org). > > > > > > > > Thanks, Linda Dunbar > > > > > > > > --------------------------------------------------------------------- > -------------- > > > > > > > > > > > > A New Internet-Draft is available from the on-line Internet-Drafts > > directories. This draft is a work item of the Address Resolution for > Massive > > numbers of hosts in the Data center Working Group of the IETF. > > > > > > > > =A0=A0=A0=A0=A0=A0=A0 Title=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : Problem Sta= tement for ARMD > > > > =A0=A0=A0=A0=A0=A0=A0 Author(s)=A0=A0=A0=A0=A0=A0 : Thomas Narten > > > > =A0=A0=A0=A0=A0=A0=A0 Filename=A0=A0=A0=A0=A0=A0=A0 : draft-ietf-armd-p= roblem-statement-00.txt > > > > =A0=A0=A0=A0=A0=A0=A0 Pages=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : 11 > > > > =A0=A0=A0=A0=A0=A0=A0 Date=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : 2011-10-1= 7 > > > > > > > > =A0=A0 This document examines issues related to the massive scaling of > data > > > > =A0=A0 centers.=A0 Our initial scope is relatively narrow.=A0 Specifica= lly, > we > > > > =A0=A0 focus on address resolution (ARP and ND) within the data center. > > > > > > > > > > > > A URL for this Internet-Draft is: > > > > http://www.ietf.org/internet-drafts/draft-ietf-armd-problem- > statement-00.txt > > > > > > > > Internet-Drafts are also available by anonymous FTP at: > > > > ftp://ftp.ietf.org/internet-drafts/ > > > > > > > > This Internet-Draft can be retrieved at: > > > > ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-statement- > 00.txt > > > > From skh@ndzh.com Wed Nov 9 12:27:48 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 197171F0C74; Wed, 9 Nov 2011 12:27:48 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.618 X-Spam-Level: X-Spam-Status: No, score=0.618 tagged_above=-999 required=5 tests=[AWL=-0.600, BAYES_00=-2.599, FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888, HELO_MISMATCH_COM=0.553, HOST_MISMATCH_NET=0.311, J_CHICKENPOX_13=0.6, J_CHICKENPOX_32=0.6, RDNS_DYNAMIC=0.1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZkKv3uVmYJ7D; Wed, 9 Nov 2011 12:27:47 -0800 (PST) Received: from hickoryhill-consulting.com (63-208-161-201.digitalrealm.net [63.208.161.201]) by ietfa.amsl.com (Postfix) with ESMTP id 42A561F0C4C; Wed, 9 Nov 2011 12:27:47 -0800 (PST) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=63.133.138.150; Received: from SKHPERSONALLT (unverified [63.133.138.150]) by hickoryhill-consulting.com (SurgeMail 5.2a) with ESMTP id 2825941-1945496 for multiple; Wed, 09 Nov 2011 15:26:58 -0500 From: "Susan Hares" To: "'Linda Dunbar'" , "'Pedro Marques'" References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> In-Reply-To: <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> Date: Wed, 9 Nov 2011 15:27:03 -0500 Message-ID: <000501cc9f1d$f16be5f0$d443b1d0$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AQHMnxkRlZozan+p5EmwsYAz13twApWk988ggAAFvLA= Content-Language: en-us X-Authenticated-User: skh@ndzh.com Cc: l2vpn@ietf.org, sdnp@lucidvision.com, 'L3VPN WG mailing list' , armd@ietf.org Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Nov 2011 20:27:48 -0000 Pedro: Your review of the draft would be especially helpful in the L3 only = design.=20 Sue=20 -----Original Message----- From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of Linda Dunbar Sent: Wednesday, November 09, 2011 3:12 PM To: Pedro Marques Cc: l2vpn@ietf.org; sdnp@lucidvision.com; L3VPN WG mailing list; armd@ietf.org Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt Pedro,=20 You are absolutely right that there is no ARP/ND scaling issue if IP can = be extended to hosts. Even if IP can be extended to Access switches, there = is not much ARP/ND issues.=20 The draft lists down several common data center network designs, and = states that some of the designs don't have ARP/ND scaling issues (but may have other issues for data centers).=20 That is why I encourage people to read the draft and provides comments.=20 Linda=20 > -----Original Message----- > From: Pedro Marques [mailto:pedro.r.marques@gmail.com] > Sent: Wednesday, November 09, 2011 1:52 PM > To: Linda Dunbar > Cc: l2vpn@ietf.org; L3VPN WG mailing list; sdnp@lucidvision.com; > armd@ietf.org > Subject: Re: Need your action to review draft-ietf-armd-problem- > statement-00.txt >=20 > Linda, > I'd like to point out that the problem does not need to be solved if > only IP connectivity is required. This I-D: > http://tools.ietf.org/html/draft-marques-l3vpn-end-system-02 describes > a solution in which address resolution is not required irrespective of > the location of the traffic destination. Simply put, traffic can be > routed at each hop. >=20 > As per previous threads in this list, the concept of subnet which is > of no practical usefulness in this space. Since VMs can be randomly > distributed across the network the subnet does not provide any > information aggregation value. Thus there is no need to do address > resolution. >=20 > Pedro. >=20 > On Wed, Nov 9, 2011 at 11:31 AM, Linda Dunbar = > wrote: > > For those of you who touch upon Data Center networking or server > > virtualization, be it Overlay, VPN4DC, or Application/Software = driven > > Controller for Data Center, Address Resolution is something Data > Center > > Gateways =A0will encounter because hosts/applications in data = centers > do > > communicate with peers which are not in the same Overlay, outside = the > VPN > > domain, or from general public. ARMD has published its WG problem > statement > > draft. Your comments and suggestions are appreciated (send to > > armd@ietf.org). > > > > > > > > Thanks, Linda Dunbar > > > > > > > > = --------------------------------------------------------------------- > -------------- > > > > > > > > > > > > A New Internet-Draft is available from the on-line Internet-Drafts > > directories. This draft is a work item of the Address Resolution for > Massive > > numbers of hosts in the Data center Working Group of the IETF. > > > > > > > > =A0=A0=A0=A0=A0=A0=A0 Title=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : Problem = Statement for ARMD > > > > =A0=A0=A0=A0=A0=A0=A0 Author(s)=A0=A0=A0=A0=A0=A0 : Thomas Narten > > > > =A0=A0=A0=A0=A0=A0=A0 Filename=A0=A0=A0=A0=A0=A0=A0 : = draft-ietf-armd-problem-statement-00.txt > > > > =A0=A0=A0=A0=A0=A0=A0 Pages=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : 11 > > > > =A0=A0=A0=A0=A0=A0=A0 Date=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : = 2011-10-17 > > > > > > > > =A0=A0 This document examines issues related to the massive scaling = of > data > > > > =A0=A0 centers.=A0 Our initial scope is relatively narrow.=A0 = Specifically, > we > > > > =A0=A0 focus on address resolution (ARP and ND) within the data = center. > > > > > > > > > > > > A URL for this Internet-Draft is: > > > > http://www.ietf.org/internet-drafts/draft-ietf-armd-problem- > statement-00.txt > > > > > > > > Internet-Drafts are also available by anonymous FTP at: > > > > ftp://ftp.ietf.org/internet-drafts/ > > > > > > > > This Internet-Draft can be retrieved at: > > > > = ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-statement- > 00.txt > > > > _______________________________________________ armd mailing list armd@ietf.org https://www.ietf.org/mailman/listinfo/armd From pedro.r.marques@gmail.com Wed Nov 9 14:20:56 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 62F1C11E8090; Wed, 9 Nov 2011 14:20:56 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.931 X-Spam-Level: X-Spam-Status: No, score=-2.931 tagged_above=-999 required=5 tests=[AWL=0.668, BAYES_00=-2.599, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6eIqHnYlZcmd; Wed, 9 Nov 2011 14:20:55 -0800 (PST) Received: from mail-iy0-f172.google.com (mail-iy0-f172.google.com [209.85.210.172]) by ietfa.amsl.com (Postfix) with ESMTP id 3D81611E8080; Wed, 9 Nov 2011 14:20:55 -0800 (PST) Received: by iaeo4 with SMTP id o4so2843009iae.31 for ; Wed, 09 Nov 2011 14:20:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; bh=oLwP+ID7yPLVTzPY5yfEGHdExfYTow5LSJdpXQW50Bc=; b=q9ndhoGRRWmmmWeaFlPgfndDnMilZljIqv1diOLeVSujVqVXKbU+IQvuGU1T7cVEKF 7lVlo2ZM6Bsrfjag/b17cGCzCkLb6eamGpxuIMZePTVtv6tCIYoCgM2OjHq3Thp8yQNm pcdkPoWZQJS6Epg1TICS3eZEWjU+Ozw5vD7R0= MIME-Version: 1.0 Received: by 10.42.72.135 with SMTP id o7mr5031566icj.45.1320877253259; Wed, 09 Nov 2011 14:20:53 -0800 (PST) Received: by 10.231.12.2 with HTTP; Wed, 9 Nov 2011 14:20:53 -0800 (PST) In-Reply-To: <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> Date: Wed, 9 Nov 2011 14:20:53 -0800 Message-ID: From: Pedro Marques To: Linda Dunbar Content-Type: text/plain; charset=ISO-8859-1 X-Mailman-Approved-At: Wed, 09 Nov 2011 15:01:10 -0800 Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Nov 2011 22:20:56 -0000 Linda, Please see inline. On Wed, Nov 9, 2011 at 12:12 PM, Linda Dunbar wrote: > Pedro, > > You are absolutely right that there is no ARP/ND scaling issue if IP can be extended to hosts. Even if IP can be extended to Access switches, there is not much ARP/ND issues. The draft is a bit unclear in terms of its assumptions regarding the connectivity of the VMs. It does state that the VMs typically have their own IP and mac addresses but doesn't mention that these are typically also associated with different VLANs. There are multiple proposals (e.g. VXLAN) in which these VLANs are data-center wide. Thus if the VM sees a LAN adjacency to its "subnet" there is an ARP/ND issue to solve. VXLAN for instance assumes that ARP requests will be broadcasted using IP multicast groups per VLAN. You may want to characterize the several 'categories' of proposals that satisfy the requirements of VM mobility and closed user group isolation. For example: L2 approaches: (e.g. VXLAN) These tend towards creating a data-center wide broadcast domain. The broadcast domain can then be used to send ARP/ND requests. Routed L2/L3 approaches (e.g. EVPN): Present an L2 interface to the VM but transform it to a routed approach in a network element and advertise mac (optionally) + ip host prefixes from the network elements. An important sub category here is whether these solutions then assume multicast capability or not in the underlying network. Host based approaches. These can present either an L2 or L3 "service" and assume or not the presence of an underlying multicast service on the part of the underlying "fabric" network. Map service based approaches: Use a query based mechanism rather than a "push" based mechanism like routing to distributed the overlay network information. Each of these has its own way to address ARP/ND related issues. If you your intent is to document the possibilities there is plenty of options to choose from. :-) Pedro. From bschlies@cisco.com Wed Nov 9 20:00:16 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B32B921F84A2 for ; Wed, 9 Nov 2011 20:00:16 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.313 X-Spam-Level: X-Spam-Status: No, score=-6.313 tagged_above=-999 required=5 tests=[AWL=0.286, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6OPDCKw1jsWb for ; Wed, 9 Nov 2011 20:00:15 -0800 (PST) Received: from mtv-iport-1.cisco.com (mtv-iport-1.cisco.com [173.36.130.12]) by ietfa.amsl.com (Postfix) with ESMTP id 3E6BA21F84A3 for ; Wed, 9 Nov 2011 20:00:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=bschlies@cisco.com; l=6134; q=dns/txt; s=iport; t=1320897615; x=1322107215; h=from:content-transfer-encoding:subject:date:message-id: to:mime-version; bh=iBUU+RyzGVtGt+28mx6YQcVrgqDeTSaZrMic7pWdix8=; b=KekMn6GPJ57ZRdDHGPMi9b5IEPiS8BxIjLczz2awTABuhnELX2D2erw0 MXLR32Kz/m5bhfKACtq4eUogaa7FOaLZyJAu0tOgNuhe6RZ1rQOPIu6oO XD135IJX6yMp7tzOq8ptf8aQgU8ILoaYmnqL1keRRX7e4Kbo6DfQA3NmP U=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av0EAFVLu06rRDoG/2dsb2JhbABDqiaBBYILAQUiNDh9QgefRoEmAZ8EiRxjBIgMjBmSEQ X-IronPort-AV: E=Sophos;i="4.69,486,1315180800"; d="scan'208";a="11793802" Received: from mtv-core-1.cisco.com ([171.68.58.6]) by mtv-iport-1.cisco.com with ESMTP; 10 Nov 2011 04:00:14 +0000 Received: from sjc-bschlies-89112.cisco.com (sjc-bschlies-89112.cisco.com [10.20.217.237]) by mtv-core-1.cisco.com (8.14.3/8.14.3) with ESMTP id pAA40EOH006688 for ; Thu, 10 Nov 2011 04:00:14 GMT From: Benson Schliesser Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Date: Wed, 9 Nov 2011 22:00:14 -0600 Message-Id: <5F6E831B-BFD7-4C83-BD37-2FAE5413C054@cisco.com> To: armd@ietf.org Mime-Version: 1.0 (Apple Message framework v1084) X-Mailer: Apple Mail (2.1084) Subject: [armd] ARMD Status and Work Plan X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Nov 2011 04:00:16 -0000 ARMD Participants - Linda and I have been discussing ARMD's progress against our charter and = planning next steps for the WG, and we would like your feedback. This = topic will be discussed at the upcoming IETF-82 meeting in Taipei. But = even if you plan to attend in person, please provide feedback on the = mailing list so that everybody can join the discussion. We apologize for = the length of this message, but hope that you will take the time to = respond to each of the questions below. 1. CURRENT STATUS OF MILESTONES According to our charter we have several milestones that are due. = Specifically, we are overdue to publish a Problem Statement and we are = currently due to publish documents on "statistics collection and = behavior analysis", a "survey of existing implementations", and a = "survey of security". ARMD has a draft for the problem statement = (draft-ietf-armd-problem-statement-00). Also, there is an individual = draft discussing statistics (draft-karir-armd-statistics-01) and there = is an independent draft on datacenter architecture = (draft-armd-datacenter-reference-arch-00). Collectively, these drafts = would seem to satisfy some of our milestones. As a WG we need to decide = on next steps for these documents. As for the other milestones that are not addressed by the existing = drafts, we must decide how to proceed. There is a comment, about = variations of ARP / ND implementations, in = draft-karir-armd-statistics-01 which might apply to the "survey of = existing implementations" milestone. But we do not have an actual survey = per se, with details of the various ARP and ND implementations. Also, = to my knowledge we have no contributions that might apply to the "survey = of security" milestone. The WG needs to decide how to proceed with these = milestones. - Does the WG feel that our Problem Statement is complete? - Does the WG feel that draft-karir-armd-statistics and/or = draft-armd-datacenter-reference-arch should be made WG documents, = incorporated in the Problem Statement, and/or need more work? - Does the WG have interest in pursuing further work on the "survey of = existing implementations" and "survey of security" milestones? 2. NEXT STEPS In addition to the milestones mentioned above, our charter includes two = milestones due in March 2012. These are to document ARMD's = "recommendations" and perform a "gap analysis". Thus far, the chairs have identified two types of recommendation that = ARMD might consider making. The first is an ARP and/or ND = "implementation" BCP, with recommendations for configuring or tuning ARP = and/or ND. This would be much easier if we have a completed ARP/ND = implementation survey. The second is an operational "how to scale" = recommendation. As an illustrative example, this might suggest such = options as A) replace ARP/ND with static entries, B) use L2/L3 = segmentation to fit within specified constraints (smaller L2 domains, L3 = to the access layer, etc), and/or C) deploy ARP/ND proxy functions in = the network. This example isn't meant as a proposal, merely as an = illustration for further discussion. The WG needs to decide what = recommendations to make. As an aside, I would like to point out that ARP Proxy isn't very well = defined. There are multiple variations of ARP Proxy with different = levels of documentation. As examples of different ARP Proxy behaviors, = please see RFC1027 and draft-shah-armd-arp-reduction-02. I also = recommend becoming familiar with draft-hu-trill-rbridge-esadi and = draft-dunbar-trill-directory-assisted-edge, as well as OpenFlow, the = NVO3 effort, etc. If the WG recommends ARP Proxy as described above, = then we may need to survey existing ARP and/or ND Proxy behaviors. Once we have documented our recommendations, the WG will perform a gap = analysis, comparing our recommendations (and the existing solutions) = versus the issues identified by our Problem Statement. If there are = gaps, then the WG should develop a Requirements document, as input to = future work. The development of a solution, based on those requirements, = might happen in a different WG or by a re-chartered ARMD. - Does the WG have interest in developing an "ARP/ND implementation" = recommendation, a "how to scale" recommendation, and/or some other = recommendation(s)? - Does the WG feel that there are gaps between existing solutions and = the issues described by our Problem Statement? If so, what are the = requirements for a solution to the Problem Statement? 3. OTHER TOPICS TO CONSIDER Considering the ARMD charter as a whole, we are not limited to = discussion of ARP and ND, and we may consider other Address Resolution = mechanisms that are applicable to massive datacenters. For example, the work taking place under the name "NVO3" (possibly = including NVGRE, VXLAN, etc) is an example of an overlay approach that = ARMD might consider. Specifically, ARMD might consider issues related to = "inter-layer" address resolution (mapping "inside" addresses to = "outside" addresses). And/or ARMD might consider issues related to = traditional ARP/ND address resolution within an overlay, etc. (Note that = ARMD cannot develop overlay solutions, per our current charter, but it = may be appropriate to investigate the operational issues associated with = them.) As an additional example, ARMD might consider operational issues and/or = requirements related to address resolution in TRILL campuses, OpenFlow = networks, etc. The chairs have not specifically identified these as = topics for ARMD, but rather we hope the WG will decide whether they are = relevant or whether our current scope is adequate. - Does the WG feel that our current Problem Statement scope should = include additional topics, such as those described above and/or others? Thanks for taking the time to read this message. We look forward to = receiving feedback from all ARMD participants. And we look forward to = seeing some of you in Taipei. Cheers, -Benson & Linda From thomas.morin@orange.com Thu Nov 10 07:04:35 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 64BD421F8AFB for ; Thu, 10 Nov 2011 07:04:35 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.249 X-Spam-Level: X-Spam-Status: No, score=-3.249 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, HELO_EQ_FR=0.35, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id haWtBW0JgKCN for ; Thu, 10 Nov 2011 07:04:34 -0800 (PST) Received: from p-mail2.rd.francetelecom.com (p-mail2.rd.francetelecom.com [195.101.245.16]) by ietfa.amsl.com (Postfix) with ESMTP id 2571121F8AF5 for ; Thu, 10 Nov 2011 07:04:34 -0800 (PST) Received: from p-mail2.rd.francetelecom.com (localhost.localdomain [127.0.0.1]) by localhost (Postfix) with SMTP id 1FE1F858005; Thu, 10 Nov 2011 16:14:43 +0100 (CET) Received: from ftrdsmtp1.rd.francetelecom.fr (unknown [10.192.128.46]) by p-mail2.rd.francetelecom.com (Postfix) with ESMTP id 185E8858001; Thu, 10 Nov 2011 16:14:43 +0100 (CET) Received: from ftrdmel1.rd.francetelecom.fr ([10.192.128.40]) by ftrdsmtp1.rd.francetelecom.fr with Microsoft SMTPSVC(6.0.3790.4675); Thu, 10 Nov 2011 16:04:32 +0100 X-MimeOLE: Produced By Microsoft Exchange V6.5 Received: from 10.193.21.179 ([10.193.21.179]) by ftrdmel1.rd.francetelecom.fr ([10.192.128.40]) via Exchange Front-End Server owa.rd.francetelecom.fr ([10.192.128.53]) with Microsoft Exchange Server HTTP-DAV ; Thu, 10 Nov 2011 15:04:31 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Organization: France Telecom Orange user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20111105 Thunderbird/8.0 Content-class: urn:content-classes:message Date: Thu, 10 Nov 2011 16:04:45 +0100 Message-ID: In-Reply-To: <004a01cc9efc$01f396b0$05dac410$@com> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 Thread-Index: AcyfugzvOXS3mQfqQiSse8Q6iUuZ0w== References: <4A95BA014132FF49AE685FAB4B9F17F6120AEBDD@dfweml505-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE7477C7@szxeml525-mbs.china.huawei.com> <004a01cc9efc$01f396b0$05dac410$@com> From: To: X-OriginalArrivalTime: 10 Nov 2011 15:04:32.0154 (UTC) FILETIME=[0D39FFA0:01CC9FBA] Cc: xuxiaohu@huawei.com, armd@ietf.org Subject: Re: [armd] What is the proper definition for Broadcast Domain? which is used in draft-ietf-armd-problem-statement-00 X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." 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Violators will be prosecuted; Thu, 10 Nov 2011 10:49:45 -0500 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by d01relay03.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id pAAFniJO269046; Thu, 10 Nov 2011 10:49:44 -0500 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id pAAFneMY021246; Thu, 10 Nov 2011 08:49:41 -0700 Received: from cichlid.raleigh.ibm.com (sig-9-65-211-231.mts.ibm.com [9.65.211.231]) by d03av02.boulder.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id pAAFndTb021036 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 10 Nov 2011 08:49:40 -0700 Received: from cichlid.raleigh.ibm.com (cichlid.raleigh.ibm.com [127.0.0.1]) by cichlid.raleigh.ibm.com (8.14.4/8.12.5) with ESMTP id pAAFnajV013933; Thu, 10 Nov 2011 10:49:37 -0500 Message-Id: <201111101549.pAAFnajV013933@cichlid.raleigh.ibm.com> To: Pedro Marques In-reply-to: References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> Comments: In-reply-to Pedro Marques message dated "Wed, 09 Nov 2011 14:20:53 -0800." Date: Thu, 10 Nov 2011 10:49:36 -0500 From: Thomas Narten x-cbid: 11111015-9360-0000-0000-0000007CF0E1 Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , "armd@ietf.org" , L3VPN WG mailing list Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Nov 2011 15:49:49 -0000 Hi Pedro. > The draft is a bit unclear in terms of its assumptions regarding the > connectivity of the VMs. It does state that the VMs typically have > their own IP and mac addresses but doesn't mention that these are > typically also associated with different VLANs. Fair enough. I'll look at clarifying this in the next version (though I'm not sure right off how it changes anything). > There are multiple proposals (e.g. VXLAN) in which these VLANs are > data-center wide. Thus if the VM sees a LAN adjacency to its "subnet" > there is an ARP/ND issue to solve. VXLAN for instance assumes that ARP > requests will be broadcasted using IP multicast groups per VLAN. I don't think it is quite right to say that VXLAN uses "data center wide VLANs". VXLAN (and overlay approaches in general) use their own instance identifier space. It is conceptually like a VLAN (in that it groups together related servers). But it is not the same as a VLAN, and using that terminology in the context of VXLAN is probably going to confuse folk. > You may want to characterize the several 'categories' of proposals > that satisfy the requirements of VM mobility and closed user group > isolation. > For example: > L2 approaches: (e.g. VXLAN) > These tend towards creating a data-center wide broadcast domain. The > broadcast domain can then be used to send ARP/ND requests. Correct. But there are also optimizations that can be done (like Proxy ARP) to limit the need to actually broadcast. > Routed L2/L3 approaches (e.g. EVPN): > Present an L2 interface to the VM but transform it to a routed > approach in a network element and advertise mac (optionally) + ip host > prefixes from the network elements. An important sub category here is > whether these solutions then assume multicast capability or not in the > underlying network. And how is VXLAN not a routed approach? It presents an L2 interface to the VM, but everything is routed at L3 from the switch on out. The main differences I see between EVPN and overlay approachs like VXLAN are: 1) VXLAN goes all the way to the hypervisor. It's only the VM->Hypervisor "link" that is L2. 2) VXLAN uses a different control plane (e.g., IEEE 802 approach) whereas EVPN appears to be BGP based. > Host based approaches. > These can present either an L2 or L3 "service" and assume or not the > presence of an underlying multicast service on the part of the > underlying "fabric" network. Not sure what you mean here. Is this where the Host (VM) itself is aware of the service and interacts directly with it? And wouldn't that require host changes, which IMO is pretty much a non-starter? > Map service based approaches: > Use a query based mechanism rather than a "push" based mechanism > like routing to distributed the overlay network information. > Each of these has its own way to address ARP/ND related issues. If you > your intent is to document the possibilities there is plenty of > options to choose from. :-) Indeed! Thomas From pedro.r.marques@gmail.com Thu Nov 10 08:59:39 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1805621F8AE6; Thu, 10 Nov 2011 08:59:39 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.964 X-Spam-Level: X-Spam-Status: No, score=-2.964 tagged_above=-999 required=5 tests=[AWL=0.635, BAYES_00=-2.599, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 94guZtq+udAm; Thu, 10 Nov 2011 08:59:38 -0800 (PST) Received: from mail-iy0-f172.google.com (mail-iy0-f172.google.com [209.85.210.172]) by ietfa.amsl.com (Postfix) with ESMTP id 0ABED21F8B30; Thu, 10 Nov 2011 08:59:37 -0800 (PST) Received: by iaeo4 with SMTP id o4so4079457iae.31 for ; Thu, 10 Nov 2011 08:59:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=LU8FDDxDJ46LSZ4l5YTLLqvBzdTycUTucfP/wNvyHz0=; b=pd8QEP0XKG+x1SKbqvh95zxTV31M/PkgAVyDzq+j3sBC3UzxptgmdooDGdAGjH5rB+ kOdHosQNrm4F9//e9mf8hJ3q/KUOSUN5CTru8485wDg+jPGykvYYywepO04gGu+juijL CQc6O4L/gu9ORpgCkiObVcRNPOpn9jI5PmEjs= MIME-Version: 1.0 Received: by 10.231.84.135 with SMTP id j7mr1996731ibl.81.1320944377485; Thu, 10 Nov 2011 08:59:37 -0800 (PST) Received: by 10.231.12.2 with HTTP; Thu, 10 Nov 2011 08:59:37 -0800 (PST) In-Reply-To: <201111101549.pAAFnajV013933@cichlid.raleigh.ibm.com> References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> <201111101549.pAAFnajV013933@cichlid.raleigh.ibm.com> Date: Thu, 10 Nov 2011 08:59:37 -0800 Message-ID: From: Pedro Marques To: Thomas Narten Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Mailman-Approved-At: Thu, 10 Nov 2011 09:11:36 -0800 Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , "armd@ietf.org" , L3VPN WG mailing list Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Nov 2011 16:59:39 -0000 Thomas, On Thu, Nov 10, 2011 at 7:49 AM, Thomas Narten wrote: >> There are multiple proposals (e.g. VXLAN) in which these VLANs are >> data-center wide. Thus if the VM sees a LAN adjacency to its "subnet" >> there is an ARP/ND issue to solve. VXLAN for instance assumes that ARP >> requests will be broadcasted using IP multicast groups per VLAN. > > I don't think it is quite right to say that VXLAN uses "data center > wide VLANs". =A0VXLAN (and overlay approaches in general) use their own > instance identifier space. It is conceptually like a VLAN (in that it > groups together related servers). But it is not the same as a VLAN, > and using that terminology in the context of VXLAN is probably going > to confuse folk. The proposal uses a data-center wide broadcast domain. In common terminology people often refer to a broadcast domain as a VLAN. > >> You may want to characterize the several 'categories' of proposals >> that satisfy the requirements of VM mobility and closed user group >> isolation. > >> For example: > >> L2 approaches: (e.g. VXLAN) >> =A0 These tend towards creating a data-center wide broadcast domain. The >> broadcast domain can then be used to send ARP/ND requests. > > Correct. But there are also optimizations that can be done (like Proxy > ARP) to limit the need to actually broadcast. It depends on what action is taken when a VM moves. In what i'm labeling as an "L2 based" approach a VM move is handled by generating a gratuitous ARP reply to update all ARP caches and learning tables. If that is the VM move update mechanism proxy ARP cannot be used. > >> Routed L2/L3 approaches (e.g. EVPN): > >> =A0 Present an L2 interface to the VM but transform it to a routed >> approach in a network element and advertise mac (optionally) + ip host >> prefixes from the network elements. An important sub category here is >> whether these solutions then assume multicast capability or not in the >> underlying network. > > And how is VXLAN not a routed approach? It presents an L2 interface to > the VM, but everything is routed at L3 from the switch on out. The addresses of the overlay network are learned by the egress switches and it depends on a broadcast domain. It sees the underlying "fabric" network as a LAN. This is in contrast with approach in which the information regarding the overlay network is advertised via routing protocols (your get your choice of ISIS variants and BGP). > > The main differences I see between EVPN and overlay approachs like > VXLAN are: > > 1) VXLAN goes all the way to the hypervisor. It's only the > VM->Hypervisor "link" that is L2. > > 2) VXLAN uses a different control plane (e.g., IEEE 802 approach) > whereas EVPN appears to be BGP based. VXLAN treats the underlying DC fabric network as a LAN. And uses learning on the data plane. EVPN only "learns" on the edge facing interface. This has consequences on VM moves for instance. In the second case the move can be done as a "route advertisement". It also has consequences on the operational state. With a learning based approach the actual state of the network is just valid at that precise moment. Which makes it very difficult to understand whether the state is correct or not. That is common with all data-driven approaches. > >> Host based approaches. >> =A0 These can present either an L2 or L3 "service" and assume or not the >> presence of an underlying multicast service on the part of the >> underlying "fabric" network. > > Not sure what you mean here. Is this where the Host (VM) itself is > aware of the service and interacts directly with it? And wouldn't that > require host changes, which IMO is pretty much a non-starter? The Host OS / hypervisor. Not the Guest VM. It is a common practice that the network stack of the host OS is a special purpose stack (e.g. vSwitch style approaches). The network stack is not the only aspect of the VM hosting software that is modified to support this class of applications. Pedro. From bschlies@cisco.com Thu Nov 10 11:02:05 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8B47921F8B16 for ; Thu, 10 Nov 2011 11:02:05 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.332 X-Spam-Level: X-Spam-Status: No, score=-6.332 tagged_above=-999 required=5 tests=[AWL=0.267, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QZEPBqEttBW3 for ; Thu, 10 Nov 2011 11:02:04 -0800 (PST) Received: from mtv-iport-2.cisco.com (mtv-iport-2.cisco.com [173.36.130.13]) by ietfa.amsl.com (Postfix) with ESMTP id 0A95721F8B02 for ; Thu, 10 Nov 2011 11:02:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=bschlies@cisco.com; l=7531; q=dns/txt; s=iport; t=1320951724; x=1322161324; h=mime-version:subject:from:in-reply-to:date: content-transfer-encoding:message-id:references:to; bh=dhhsoPtu/sPJCsVpN73uz+f+rjYFS3pVISLZmunUhEE=; b=IwFULIMJUV5KU9yx7iysXi5A8tHqM2wrBdXYmSUE4HhAjvTFKbGA4wqe PP8+Dm6KW9/5grQcn5qJYOqysQ85tZPhYVGPryqOBJYurRlqCr2YVAe0u 9C9hrBhYNRmnwPeolb9vCRqXAyseRzPMs0MY/rVUJ3Qmnl7e28/jxTg56 Y=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: Av4EAFkfvE6rRDoI/2dsb2JhbABEqiyBBYFyAQEBAwEBAQEPAQUiNBALCxI0JyIOGRsHh2AImTEBnl0EiRtjBIgPjBmSFA X-IronPort-AV: E=Sophos;i="4.69,489,1315180800"; d="scan'208";a="13484691" Received: from mtv-core-3.cisco.com ([171.68.58.8]) by mtv-iport-2.cisco.com with ESMTP; 10 Nov 2011 19:02:03 +0000 Received: from sjc-bschlies-89112.cisco.com (sjc-bschlies-89112.cisco.com [10.20.217.237]) by mtv-core-3.cisco.com (8.14.3/8.14.3) with ESMTP id pAAJ22qH025824 for ; Thu, 10 Nov 2011 19:02:03 GMT Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1084) From: Benson Schliesser In-Reply-To: <5F6E831B-BFD7-4C83-BD37-2FAE5413C054@cisco.com> Date: Thu, 10 Nov 2011 13:02:01 -0600 Content-Transfer-Encoding: quoted-printable Message-Id: References: <5F6E831B-BFD7-4C83-BD37-2FAE5413C054@cisco.com> To: armd@ietf.org X-Mailer: Apple Mail (2.1084) Subject: Re: [armd] ARMD Status and Work Plan X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Nov 2011 19:02:05 -0000 For those of you that might ignore my message as "too long; didn't = read", here is a shorter version just listing the questions: - Does the WG feel that our Problem Statement is complete? - Does the WG feel that draft-karir-armd-statistics and/or = draft-armd-datacenter-reference-arch should be made WG documents, = incorporated in the Problem Statement, and/or need more work? - Does the WG have interest in pursuing further work on the "survey of = existing implementations" and "survey of security" milestones? - Does the WG have interest in developing an "ARP/ND implementation" = recommendation, a "how to scale" recommendation, and/or some other = recommendation(s)? - Does the WG feel that there are gaps between existing solutions and = the issues described by our Problem Statement? If so, what are the = requirements for a solution to the Problem Statement? - Does the WG feel that our current Problem Statement scope should = include additional topics, such as those described [in section 3 below] = and/or others? Cheers, -Benson On Nov 9, 2011, at 10:00 PM, Benson Schliesser wrote: > ARMD Participants - >=20 > Linda and I have been discussing ARMD's progress against our charter = and planning next steps for the WG, and we would like your feedback. = This topic will be discussed at the upcoming IETF-82 meeting in Taipei. = But even if you plan to attend in person, please provide feedback on the = mailing list so that everybody can join the discussion. We apologize for = the length of this message, but hope that you will take the time to = respond to each of the questions below. >=20 > 1. CURRENT STATUS OF MILESTONES >=20 > According to our charter we have several milestones that are due. = Specifically, we are overdue to publish a Problem Statement and we are = currently due to publish documents on "statistics collection and = behavior analysis", a "survey of existing implementations", and a = "survey of security". >=20 > ARMD has a draft for the problem statement = (draft-ietf-armd-problem-statement-00). Also, there is an individual = draft discussing statistics (draft-karir-armd-statistics-01) and there = is an independent draft on datacenter architecture = (draft-armd-datacenter-reference-arch-00). Collectively, these drafts = would seem to satisfy some of our milestones. As a WG we need to decide = on next steps for these documents. >=20 > As for the other milestones that are not addressed by the existing = drafts, we must decide how to proceed. There is a comment, about = variations of ARP / ND implementations, in = draft-karir-armd-statistics-01 which might apply to the "survey of = existing implementations" milestone. But we do not have an actual survey = per se, with details of the various ARP and ND implementations. Also, = to my knowledge we have no contributions that might apply to the "survey = of security" milestone. The WG needs to decide how to proceed with these = milestones. >=20 > - Does the WG feel that our Problem Statement is complete? > - Does the WG feel that draft-karir-armd-statistics and/or = draft-armd-datacenter-reference-arch should be made WG documents, = incorporated in the Problem Statement, and/or need more work? > - Does the WG have interest in pursuing further work on the "survey of = existing implementations" and "survey of security" milestones? >=20 > 2. NEXT STEPS >=20 > In addition to the milestones mentioned above, our charter includes = two milestones due in March 2012. These are to document ARMD's = "recommendations" and perform a "gap analysis". >=20 > Thus far, the chairs have identified two types of recommendation that = ARMD might consider making. The first is an ARP and/or ND = "implementation" BCP, with recommendations for configuring or tuning ARP = and/or ND. This would be much easier if we have a completed ARP/ND = implementation survey. The second is an operational "how to scale" = recommendation. As an illustrative example, this might suggest such = options as A) replace ARP/ND with static entries, B) use L2/L3 = segmentation to fit within specified constraints (smaller L2 domains, L3 = to the access layer, etc), and/or C) deploy ARP/ND proxy functions in = the network. This example isn't meant as a proposal, merely as an = illustration for further discussion. The WG needs to decide what = recommendations to make. >=20 > As an aside, I would like to point out that ARP Proxy isn't very well = defined. There are multiple variations of ARP Proxy with different = levels of documentation. As examples of different ARP Proxy behaviors, = please see RFC1027 and draft-shah-armd-arp-reduction-02. I also = recommend becoming familiar with draft-hu-trill-rbridge-esadi and = draft-dunbar-trill-directory-assisted-edge, as well as OpenFlow, the = NVO3 effort, etc. If the WG recommends ARP Proxy as described above, = then we may need to survey existing ARP and/or ND Proxy behaviors. >=20 > Once we have documented our recommendations, the WG will perform a gap = analysis, comparing our recommendations (and the existing solutions) = versus the issues identified by our Problem Statement. If there are = gaps, then the WG should develop a Requirements document, as input to = future work. The development of a solution, based on those requirements, = might happen in a different WG or by a re-chartered ARMD. >=20 > - Does the WG have interest in developing an "ARP/ND implementation" = recommendation, a "how to scale" recommendation, and/or some other = recommendation(s)? > - Does the WG feel that there are gaps between existing solutions and = the issues described by our Problem Statement? If so, what are the = requirements for a solution to the Problem Statement? >=20 > 3. OTHER TOPICS TO CONSIDER >=20 > Considering the ARMD charter as a whole, we are not limited to = discussion of ARP and ND, and we may consider other Address Resolution = mechanisms that are applicable to massive datacenters. >=20 > For example, the work taking place under the name "NVO3" (possibly = including NVGRE, VXLAN, etc) is an example of an overlay approach that = ARMD might consider. Specifically, ARMD might consider issues related to = "inter-layer" address resolution (mapping "inside" addresses to = "outside" addresses). And/or ARMD might consider issues related to = traditional ARP/ND address resolution within an overlay, etc. (Note that = ARMD cannot develop overlay solutions, per our current charter, but it = may be appropriate to investigate the operational issues associated with = them.) >=20 > As an additional example, ARMD might consider operational issues = and/or requirements related to address resolution in TRILL campuses, = OpenFlow networks, etc. The chairs have not specifically identified = these as topics for ARMD, but rather we hope the WG will decide whether = they are relevant or whether our current scope is adequate. >=20 > - Does the WG feel that our current Problem Statement scope should = include additional topics, such as those described above and/or others? >=20 > Thanks for taking the time to read this message. We look forward to = receiving feedback from all ARMD participants. And we look forward to = seeing some of you in Taipei. >=20 > Cheers, > -Benson & Linda >=20 > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd From adalela@cisco.com Thu Nov 10 17:05:36 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 211821F0C55 for ; Thu, 10 Nov 2011 17:05:36 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.599 X-Spam-Level: X-Spam-Status: No, score=-6.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TN9cCrE6moF9 for ; Thu, 10 Nov 2011 17:05:35 -0800 (PST) Received: from ams-iport-4.cisco.com (ams-iport-4.cisco.com [144.254.224.147]) by ietfa.amsl.com (Postfix) with ESMTP id 6AA771F0C3C for ; Thu, 10 Nov 2011 17:05:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=adalela@cisco.com; l=9288; q=dns/txt; s=iport; t=1320973534; x=1322183134; h=mime-version:content-transfer-encoding:subject:date: message-id:in-reply-to:references:from:to; bh=6nyIjMcobwheFN5sf+zZYsprhxmibFomJ/7M1gYARX8=; b=MOeJm3IcqYSGYj1cA92OD2onvG2DcIs8d+B3WhLjkaYIMQTfGBmN8GJV zkWpXXn/utfIWFONj+l6eLm/82Xe9jP/ekeJOgEUJZ9nL7ClVN9+KW2Y6 rG8mWqYJjonwAr1Vh6hpNH3uzh1YTECTwJPmLeHxBEIxBnRwhy0/PLdic 4=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AskAAHh0vE5Io8US/2dsb2JhbABEmjOPeoEFgXIBAQEBAgEBAQEPAQUYCisIARAHBAIBCBEBAwEBCwYXAQYBJh8DBggBAQQBCggIEweHYAiaQQGeSASJG2MEiA2RXIw8 X-IronPort-AV: E=Sophos;i="4.69,491,1315180800"; d="scan'208";a="2846217" Received: from bgl-core-3.cisco.com ([72.163.197.18]) by ams-iport-4.cisco.com with ESMTP; 11 Nov 2011 01:05:31 +0000 Received: from xbh-bgl-412.cisco.com (xbh-bgl-412.cisco.com [72.163.129.202]) by bgl-core-3.cisco.com (8.14.3/8.14.3) with ESMTP id pAB15UaU022258 for ; Fri, 11 Nov 2011 01:05:30 GMT Received: from xmb-bgl-416.cisco.com ([72.163.129.212]) by xbh-bgl-412.cisco.com with Microsoft SMTPSVC(6.0.3790.4675); Fri, 11 Nov 2011 06:35:30 +0530 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Date: Fri, 11 Nov 2011 06:35:15 +0530 Message-ID: <618BE8B40039924EB9AED233D4A09C510265A245@XMB-BGL-416.cisco.com> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [armd] ARMD Status and Work Plan Thread-Index: Acyf20G6KSh4asg1QDeguoHZfYDOCwALvqxQ References: <5F6E831B-BFD7-4C83-BD37-2FAE5413C054@cisco.com> From: "Ashish Dalela (adalela)" To: "Benson Schliesser (bschlies)" , X-OriginalArrivalTime: 11 Nov 2011 01:05:30.0516 (UTC) FILETIME=[01AF6540:01CCA00E] Subject: Re: [armd] ARMD Status and Work Plan X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Nov 2011 01:05:36 -0000 In the interest of kick-starting a discussion, below are some random thoughts. First, address resolution is comprised of two problems -=20 - at the level of ARP/ND and=20 - at the level of Location/Address binding These two problems can be combined/coupled or kept separate. It might be good to say that there are two types "resolving" and do we want to combine or keep them separate. Combining has backward compatibility issues, but it might be worth determining if the benefits warrant that disruption. Second, there are questions about architecture of address resolution -=20 - distributed at access - distributed all over (e.g. with a hash) - centralized at some points (load-balanced) There can be a discussion of various models, their pros-and-cons, with a recommendation. Third, how does the address resolver get populated? - snoop ARP/ND=20 - rely on conversation learning - use protocols to update addresses This gets into the design of the mechanism, and has implications for convergence/reliability. Fourth, there are issues of security and manageability - can anyone resolve anyone (security)? - how do I know who is resolving whom (which are active flows)? - is address resolution a self-sustaining system, or operator controls it (policy)? Rather than start with a problem statement, it might be good to start with questions, then determine if some of them are problems, then decide if we really want to solve these problems (some problems are best left untouched ;-)). Thanks, Ashish -----Original Message----- From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of Benson Schliesser (bschlies) Sent: Friday, November 11, 2011 12:32 AM To: armd@ietf.org Subject: Re: [armd] ARMD Status and Work Plan For those of you that might ignore my message as "too long; didn't read", here is a shorter version just listing the questions: - Does the WG feel that our Problem Statement is complete? - Does the WG feel that draft-karir-armd-statistics and/or draft-armd-datacenter-reference-arch should be made WG documents, incorporated in the Problem Statement, and/or need more work? - Does the WG have interest in pursuing further work on the "survey of existing implementations" and "survey of security" milestones? - Does the WG have interest in developing an "ARP/ND implementation" recommendation, a "how to scale" recommendation, and/or some other recommendation(s)? - Does the WG feel that there are gaps between existing solutions and the issues described by our Problem Statement? If so, what are the requirements for a solution to the Problem Statement? - Does the WG feel that our current Problem Statement scope should include additional topics, such as those described [in section 3 below] and/or others? Cheers, -Benson On Nov 9, 2011, at 10:00 PM, Benson Schliesser wrote: > ARMD Participants - >=20 > Linda and I have been discussing ARMD's progress against our charter and planning next steps for the WG, and we would like your feedback. This topic will be discussed at the upcoming IETF-82 meeting in Taipei. But even if you plan to attend in person, please provide feedback on the mailing list so that everybody can join the discussion. We apologize for the length of this message, but hope that you will take the time to respond to each of the questions below. >=20 > 1. CURRENT STATUS OF MILESTONES >=20 > According to our charter we have several milestones that are due. Specifically, we are overdue to publish a Problem Statement and we are currently due to publish documents on "statistics collection and behavior analysis", a "survey of existing implementations", and a "survey of security". >=20 > ARMD has a draft for the problem statement (draft-ietf-armd-problem-statement-00). Also, there is an individual draft discussing statistics (draft-karir-armd-statistics-01) and there is an independent draft on datacenter architecture (draft-armd-datacenter-reference-arch-00). Collectively, these drafts would seem to satisfy some of our milestones. As a WG we need to decide on next steps for these documents. >=20 > As for the other milestones that are not addressed by the existing drafts, we must decide how to proceed. There is a comment, about variations of ARP / ND implementations, in draft-karir-armd-statistics-01 which might apply to the "survey of existing implementations" milestone. But we do not have an actual survey per se, with details of the various ARP and ND implementations. Also, to my knowledge we have no contributions that might apply to the "survey of security" milestone. The WG needs to decide how to proceed with these milestones. >=20 > - Does the WG feel that our Problem Statement is complete? > - Does the WG feel that draft-karir-armd-statistics and/or draft-armd-datacenter-reference-arch should be made WG documents, incorporated in the Problem Statement, and/or need more work? > - Does the WG have interest in pursuing further work on the "survey of existing implementations" and "survey of security" milestones? >=20 > 2. NEXT STEPS >=20 > In addition to the milestones mentioned above, our charter includes two milestones due in March 2012. These are to document ARMD's "recommendations" and perform a "gap analysis". >=20 > Thus far, the chairs have identified two types of recommendation that ARMD might consider making. The first is an ARP and/or ND "implementation" BCP, with recommendations for configuring or tuning ARP and/or ND. This would be much easier if we have a completed ARP/ND implementation survey. The second is an operational "how to scale" recommendation. As an illustrative example, this might suggest such options as A) replace ARP/ND with static entries, B) use L2/L3 segmentation to fit within specified constraints (smaller L2 domains, L3 to the access layer, etc), and/or C) deploy ARP/ND proxy functions in the network. This example isn't meant as a proposal, merely as an illustration for further discussion. The WG needs to decide what recommendations to make. >=20 > As an aside, I would like to point out that ARP Proxy isn't very well defined. There are multiple variations of ARP Proxy with different levels of documentation. As examples of different ARP Proxy behaviors, please see RFC1027 and draft-shah-armd-arp-reduction-02. I also recommend becoming familiar with draft-hu-trill-rbridge-esadi and draft-dunbar-trill-directory-assisted-edge, as well as OpenFlow, the NVO3 effort, etc. If the WG recommends ARP Proxy as described above, then we may need to survey existing ARP and/or ND Proxy behaviors. >=20 > Once we have documented our recommendations, the WG will perform a gap analysis, comparing our recommendations (and the existing solutions) versus the issues identified by our Problem Statement. If there are gaps, then the WG should develop a Requirements document, as input to future work. The development of a solution, based on those requirements, might happen in a different WG or by a re-chartered ARMD. >=20 > - Does the WG have interest in developing an "ARP/ND implementation" recommendation, a "how to scale" recommendation, and/or some other recommendation(s)? > - Does the WG feel that there are gaps between existing solutions and the issues described by our Problem Statement? If so, what are the requirements for a solution to the Problem Statement? >=20 > 3. OTHER TOPICS TO CONSIDER >=20 > Considering the ARMD charter as a whole, we are not limited to discussion of ARP and ND, and we may consider other Address Resolution mechanisms that are applicable to massive datacenters. >=20 > For example, the work taking place under the name "NVO3" (possibly including NVGRE, VXLAN, etc) is an example of an overlay approach that ARMD might consider. Specifically, ARMD might consider issues related to "inter-layer" address resolution (mapping "inside" addresses to "outside" addresses). And/or ARMD might consider issues related to traditional ARP/ND address resolution within an overlay, etc. (Note that ARMD cannot develop overlay solutions, per our current charter, but it may be appropriate to investigate the operational issues associated with them.) >=20 > As an additional example, ARMD might consider operational issues and/or requirements related to address resolution in TRILL campuses, OpenFlow networks, etc. The chairs have not specifically identified these as topics for ARMD, but rather we hope the WG will decide whether they are relevant or whether our current scope is adequate. >=20 > - Does the WG feel that our current Problem Statement scope should include additional topics, such as those described above and/or others? >=20 > Thanks for taking the time to read this message. We look forward to receiving feedback from all ARMD participants. And we look forward to seeing some of you in Taipei. >=20 > Cheers, > -Benson & Linda >=20 > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd _______________________________________________ armd mailing list armd@ietf.org https://www.ietf.org/mailman/listinfo/armd From cathryn@infc.ulst.ac.uk Fri Nov 11 01:15:26 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4E92921F8922 for ; Fri, 11 Nov 2011 01:15:26 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.599 X-Spam-Level: X-Spam-Status: No, score=-6.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id boToFPQuB1Tm for ; Fri, 11 Nov 2011 01:15:26 -0800 (PST) Received: from e4.ulster.ac.uk (e4.ulster.ac.uk [194.80.87.111]) by ietfa.amsl.com (Postfix) with ESMTP id D6B9221F849C for ; Fri, 11 Nov 2011 01:15:25 -0800 (PST) Received: from m0.ulster.ac.uk (m0.ulster.ac.uk [194.80.87.153]) by e4.ulster.ac.uk (UU/BC) with ESMTP id pAB9FP21029665 for ; Fri, 11 Nov 2011 09:15:25 GMT Received: from martello.infc.ulst.ac.uk (martello.infc.ulst.ac.uk [193.61.166.223]) by m0.ulster.ac.uk (UU/BC) with ESMTP id pAB9FOaA007244 for ; Fri, 11 Nov 2011 09:15:24 GMT (envelope-from cathryn@infc.ulst.ac.uk) Received: from localhost (localhost.localdomain [127.0.0.1]) by martello.infc.ulst.ac.uk (Postfix) with ESMTP id DE4BA3D06E1 for ; Fri, 11 Nov 2011 09:15:24 +0000 (GMT) X-Virus-Scanned: amavisd-new at martello.infc.ulst.ac.uk Received: from martello.infc.ulst.ac.uk ([127.0.0.1]) by localhost (martello.infc.ulst.ac.uk [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id T1BI6z1I6aGa for ; Fri, 11 Nov 2011 09:15:24 +0000 (GMT) Received: from martello.infc.ulst.ac.uk (martello.infc.ulst.ac.uk [193.61.166.223]) by martello.infc.ulst.ac.uk (Postfix) with ESMTP id CAB933D05BD for ; Fri, 11 Nov 2011 09:15:24 +0000 (GMT) Date: Fri, 11 Nov 2011 09:15:24 +0000 (GMT) From: "Peoples, Cathryn" To: armd@ietf.org Message-ID: <458379262.801321002924767.JavaMail.root@martello.infc.ulst.ac.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [193.61.166.86] X-Mailer: Zimbra 5.0.18_GA_3011.RHEL5_64 (ZimbraWebClient - SAF3 (Win)/5.0.18_GA_3011.RHEL5_64) Subject: [armd] [CfP] IEEE/IFIP International Workshop on Management of the Future Internet (ManFI 2012) - April 16, 2012 - Maui, Hawaii, USA X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 11 Nov 2011 09:15:26 -0000 ----------------------------------------------------------------------------------------------------- Please accept our apologies if you receive multiple copies of this CfP ----------------------------------------------------------------------------------------------------- IEEE/IFIP International Workshop on Management of the Future Internet (ManFI 2012) ================================================================================== 16 April 2012 Maui, Hawaii, USA http://www.manfi.org CALL FOR PAPERS --------------- The Fourth IEEE/IFIP International Workshop on Management of the Future Internet (ManFI 2012) will be held in conjunction with IEEE/IFIP NOMS 2012 in Maui, Hawaii, USA, from April 16-20, 2012. The workshop is sponsored by the IEEE Communications Society (ComSoc) and supported by POSTECH ITCE, Ghent University-IBBT, NEC, and Ericsson LM. The workshop is endorsed by the Technical Committee on Network Operations and Management (CNOM). It is widely agreed that, despite its many successes, the current Internet also has a set of systemic problems, ranging from an upcoming shortage of IP addresses to insufficient security. However, the lack of scalable and agile manageability is arguably more important, as without management, it is impossible to build systems that adapt the services and resources offered in a context-dependent manner. In either case (clean slate vs. evolution vs. revolution) we must consider the manageability of the Future Internet from the beginning. Following the success of the three previous editions of this workshop, held in conjunction with IM 2009, NOMS 2010 and IM 2011, ManFI 2012 aims at providing an international forum for researchers in these and similar areas. ManFI 2012 will combine original full paper presentations with a motivating keynote, quick hot topic presentations and a panel discussion to thoroughly explore this challenging topic. Topics of interest ------------------ Authors are invited to submit papers that fall into or are related to the topic areas listed below: - Architectural Issues * Advantages and disadvantages of revolutionary, evolutionary, and other approaches to managing the Future Internet * Separation of data, control, and management planes * Design of architectural building blocks for managing the Future Internet * Advances in measurement, management, security, accounting, mobility, and other functions * Virtualization of resources and services * Dynamic composition of management and operational functionality * Mechanisms for managing interconnected computational infrastructures (e.g. elastic clouds, federated clouds) in the Future Internet * Implications of social network success on the Future Internet architecture - Design and Implementation Issues * Abstractions for programmable network elements * Accommodating context-awareness in management * Applying situation awareness to network management * Federation between administrative domains and support of all constituencies * The role of models, ontologies, and other knowledge abstractions in the Future Internet * Uncertainty and probabilistic approaches to management of the Future Internet * Approaches for the organization of management data, data analytics and visualization * Experience reports from Future Internet experimental facilities set-up and results - Economic Issues * Economic aspects driving the deployment of Future Internet management technology * Economic opportunities and challenges for management technology * Experience reports from management in test beds Paper submission ---------------- Paper submissions must present original, research or experiences. Late-breaking advances and work-in-progress reports from ongoing research are also encouraged. Only original papers that have not been published or submitted for publication elsewhere can be submitted. Each submission must be written in English, accompanied by a 75 to 200 word abstract that clearly outlines the scope and contributions of the paper, and a list of up to 5 key words. There is a length limitation of 6 pages (including title, abstract, all figures, tables, and references) for regular conference papers, and 4 pages for short papers. Submissions must be in IEEE 2-column style. Papers exceeding these limits, multiple submissions, and self-plagiarized papers will be rejected without further review. Authors should submit their papers in PDF, postscript, or Word formats via JEMS: (https://submissoes.sbc.org.br/). Proceedings ----------- Papers accepted for ManFI 2012 will be included in the conference proceedings, IEEE Xplore, and EI Index. The IEEE reserves the right to remove any paper from IEEE Xplore if the paper is not presented at the workshop. Awards will be presented to the best paper and to the best student paper at the workshop. Furthermore, we plan to work with a leading journal, such as JNSM, TNSM and IJNM, to solicit extended versions of the best papers of ManFI 2012 to be submitted for review. Workshop Co-Chairs ------------------ - Prof. James Won-Ki Hong, POSTECH, Korea - Prof. Filip De Turck, Ghent University - IBBT, Belgium - Dr. Yoshiaki Kiriha, NEC, Japan - Dr. Sven van der Meer, Ericsson LM, Ireland Publicity Co-Chairs ------------------- - Leonidas Lymberopoulos, National Technical University of Athens, Greece - Cathryn Peoples, University of Ulster, UK Important dates --------------- - Abstract registration deadline: December 14, 2011 - Paper submission: December 20, 2011 - Notification of acceptance: January 31, 2012 - Final version of papers due: February 15, 2012 - Workshop date: April 16, 2012 For more information, please contact one of the Workshop Co-Chairs at tpcchairs@manfi2012.org From linda.dunbar@huawei.com Sat Nov 12 00:20:13 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 048E21F0C43 for ; Sat, 12 Nov 2011 00:20:13 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.406 X-Spam-Level: X-Spam-Status: No, score=-6.406 tagged_above=-999 required=5 tests=[AWL=0.193, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id XTDTH2oYqyDU for ; Sat, 12 Nov 2011 00:20:11 -0800 (PST) Received: from usaga02-in.huawei.com (usaga02-in.huawei.com [206.16.17.70]) by ietfa.amsl.com (Postfix) with ESMTP id B90351F0C3E for ; Sat, 12 Nov 2011 00:20:11 -0800 (PST) Received: from huawei.com (localhost [127.0.0.1]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUJ007BEGHMKQ@usaga02-in.huawei.com> for armd@ietf.org; Sat, 12 Nov 2011 02:20:11 -0600 (CST) Received: from dfweml201-edg.china.huawei.com ([172.18.4.104]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTPS id <0LUJ00A0AGHMRA@usaga02-in.huawei.com> for armd@ietf.org; Sat, 12 Nov 2011 02:20:10 -0600 (CST) Received: from DFWEML402-HUB.china.huawei.com (10.193.5.102) by dfweml201-edg.china.huawei.com (172.18.9.107) with Microsoft SMTP Server (TLS) id 14.1.270.1; Sat, 12 Nov 2011 00:20:02 -0800 Received: from DFWEML506-MBX.china.huawei.com ([10.124.31.111]) by DFWEML402-HUB.china.huawei.com ([::1]) with mapi id 14.01.0270.001; Sat, 12 Nov 2011 00:19:45 -0800 Date: Sat, 12 Nov 2011 08:19:45 +0000 From: Linda Dunbar In-reply-to: <618BE8B40039924EB9AED233D4A09C510265A245@XMB-BGL-416.cisco.com> X-Originating-IP: [10.47.112.83] To: "Ashish Dalela (adalela)" , "Benson Schliesser (bschlies)" , "armd@ietf.org" Message-id: <4A95BA014132FF49AE685FAB4B9F17F6120BF946@dfweml506-mbx> MIME-version: 1.0 Content-type: text/plain; charset=Windows-1252 Content-language: en-US Content-transfer-encoding: 7BIT Accept-Language: en-US Thread-topic: [armd] ARMD Status and Work Plan Thread-index: AQHMn11hiEP2PMQnykaHlFs+189VqZWm/dWAgABlfYCAAM9kgA== X-MS-Has-Attach: X-MS-TNEF-Correlator: References: <5F6E831B-BFD7-4C83-BD37-2FAE5413C054@cisco.com> <618BE8B40039924EB9AED233D4A09C510265A245@XMB-BGL-416.cisco.com> Subject: Re: [armd] ARMD Status and Work Plan X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 12 Nov 2011 08:20:13 -0000 Ashish, You are absolutely right that the "Address Resolution" in data center not only involves IP <-> MAC type of Address resolution (ARP/ND) but also has Host <-> Overlay Edge type of resolution due to the trend of Overlay network in data centers. The question is - should the "host (MAC or IP) <-> Overlay Edge" address resolution be a Section in the " draft-ietf-armd-problem-statement", or a separate draft? Any volunteer to write the draft? At this stage of ARMD, we don't really need to address if solution could be "combined/coupled" or kept separate (because ARMD is still in OpArea). As for "snoop ARP/ND", "conversation learning", etc, I've seen them being used today to reduce the ARP/ND processing required on boundary routers. Therefore, they should be included in the ARMD Best Common Practice Recommendation draft. Linda > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of > Ashish Dalela (adalela) > Sent: Thursday, November 10, 2011 7:05 PM > To: Benson Schliesser (bschlies); armd@ietf.org > Subject: Re: [armd] ARMD Status and Work Plan > > > In the interest of kick-starting a discussion, below are some random > thoughts. > > First, address resolution is comprised of two problems - > - at the level of ARP/ND and > - at the level of Location/Address binding > > These two problems can be combined/coupled or kept separate. It might > be > good to say that there are two types "resolving" and do we want to > combine or keep them separate. Combining has backward compatibility > issues, but it might be worth determining if the benefits warrant that > disruption. > > Second, there are questions about architecture of address resolution - > - distributed at access > - distributed all over (e.g. with a hash) > - centralized at some points (load-balanced) > > There can be a discussion of various models, their pros-and-cons, with > a > recommendation. > > Third, how does the address resolver get populated? > - snoop ARP/ND > - rely on conversation learning > - use protocols to update addresses > > This gets into the design of the mechanism, and has implications for > convergence/reliability. > > Fourth, there are issues of security and manageability > - can anyone resolve anyone (security)? > - how do I know who is resolving whom (which are active flows)? > - is address resolution a self-sustaining system, or operator controls > it (policy)? > > Rather than start with a problem statement, it might be good to start > with questions, then determine if some of them are problems, then > decide > if we really want to solve these problems (some problems are best left > untouched ;-)). > > Thanks, Ashish > > > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of > Benson Schliesser (bschlies) > Sent: Friday, November 11, 2011 12:32 AM > To: armd@ietf.org > Subject: Re: [armd] ARMD Status and Work Plan > > For those of you that might ignore my message as "too long; didn't > read", here is a shorter version just listing the questions: > > - Does the WG feel that our Problem Statement is complete? > > - Does the WG feel that draft-karir-armd-statistics and/or > draft-armd-datacenter-reference-arch should be made WG documents, > incorporated in the Problem Statement, and/or need more work? > > - Does the WG have interest in pursuing further work on the "survey of > existing implementations" and "survey of security" milestones? > > - Does the WG have interest in developing an "ARP/ND implementation" > recommendation, a "how to scale" recommendation, and/or some other > recommendation(s)? > > - Does the WG feel that there are gaps between existing solutions and > the issues described by our Problem Statement? If so, what are the > requirements for a solution to the Problem Statement? > > - Does the WG feel that our current Problem Statement scope should > include additional topics, such as those described [in section 3 below] > and/or others? > > Cheers, > -Benson > > > On Nov 9, 2011, at 10:00 PM, Benson Schliesser wrote: > > > ARMD Participants - > > > > Linda and I have been discussing ARMD's progress against our charter > and planning next steps for the WG, and we would like your feedback. > This topic will be discussed at the upcoming IETF-82 meeting in Taipei. > But even if you plan to attend in person, please provide feedback on > the > mailing list so that everybody can join the discussion. We apologize > for > the length of this message, but hope that you will take the time to > respond to each of the questions below. > > > > 1. CURRENT STATUS OF MILESTONES > > > > According to our charter we have several milestones that are due. > Specifically, we are overdue to publish a Problem Statement and we are > currently due to publish documents on "statistics collection and > behavior analysis", a "survey of existing implementations", and a > "survey of security". > > > > ARMD has a draft for the problem statement > (draft-ietf-armd-problem-statement-00). Also, there is an individual > draft discussing statistics (draft-karir-armd-statistics-01) and there > is an independent draft on datacenter architecture > (draft-armd-datacenter-reference-arch-00). Collectively, these drafts > would seem to satisfy some of our milestones. As a WG we need to decide > on next steps for these documents. > > > > As for the other milestones that are not addressed by the existing > drafts, we must decide how to proceed. There is a comment, about > variations of ARP / ND implementations, in > draft-karir-armd-statistics-01 which might apply to the "survey of > existing implementations" milestone. But we do not have an actual > survey > per se, with details of the various ARP and ND implementations. Also, > to my knowledge we have no contributions that might apply to the > "survey > of security" milestone. The WG needs to decide how to proceed with > these > milestones. > > > > - Does the WG feel that our Problem Statement is complete? > > - Does the WG feel that draft-karir-armd-statistics and/or > draft-armd-datacenter-reference-arch should be made WG documents, > incorporated in the Problem Statement, and/or need more work? > > - Does the WG have interest in pursuing further work on the "survey > of > existing implementations" and "survey of security" milestones? > > > > 2. NEXT STEPS > > > > In addition to the milestones mentioned above, our charter includes > two milestones due in March 2012. These are to document ARMD's > "recommendations" and perform a "gap analysis". > > > > Thus far, the chairs have identified two types of recommendation that > ARMD might consider making. The first is an ARP and/or ND > "implementation" BCP, with recommendations for configuring or tuning > ARP > and/or ND. This would be much easier if we have a completed ARP/ND > implementation survey. The second is an operational "how to scale" > recommendation. As an illustrative example, this might suggest such > options as A) replace ARP/ND with static entries, B) use L2/L3 > segmentation to fit within specified constraints (smaller L2 domains, > L3 > to the access layer, etc), and/or C) deploy ARP/ND proxy functions in > the network. This example isn't meant as a proposal, merely as an > illustration for further discussion. The WG needs to decide what > recommendations to make. > > > > As an aside, I would like to point out that ARP Proxy isn't very well > defined. There are multiple variations of ARP Proxy with different > levels of documentation. As examples of different ARP Proxy behaviors, > please see RFC1027 and draft-shah-armd-arp-reduction-02. I also > recommend becoming familiar with draft-hu-trill-rbridge-esadi and > draft-dunbar-trill-directory-assisted-edge, as well as OpenFlow, the > NVO3 effort, etc. If the WG recommends ARP Proxy as described above, > then we may need to survey existing ARP and/or ND Proxy behaviors. > > > > Once we have documented our recommendations, the WG will perform a > gap > analysis, comparing our recommendations (and the existing solutions) > versus the issues identified by our Problem Statement. If there are > gaps, then the WG should develop a Requirements document, as input to > future work. The development of a solution, based on those requirements, > might happen in a different WG or by a re-chartered ARMD. > > > > - Does the WG have interest in developing an "ARP/ND implementation" > recommendation, a "how to scale" recommendation, and/or some other > recommendation(s)? > > - Does the WG feel that there are gaps between existing solutions and > the issues described by our Problem Statement? If so, what are the > requirements for a solution to the Problem Statement? > > > > 3. OTHER TOPICS TO CONSIDER > > > > Considering the ARMD charter as a whole, we are not limited to > discussion of ARP and ND, and we may consider other Address Resolution > mechanisms that are applicable to massive datacenters. > > > > For example, the work taking place under the name "NVO3" (possibly > including NVGRE, VXLAN, etc) is an example of an overlay approach that > ARMD might consider. Specifically, ARMD might consider issues related > to > "inter-layer" address resolution (mapping "inside" addresses to > "outside" addresses). And/or ARMD might consider issues related to > traditional ARP/ND address resolution within an overlay, etc. (Note > that > ARMD cannot develop overlay solutions, per our current charter, but it > may be appropriate to investigate the operational issues associated > with > them.) > > > > As an additional example, ARMD might consider operational issues > and/or requirements related to address resolution in TRILL campuses, > OpenFlow networks, etc. The chairs have not specifically identified > these as topics for ARMD, but rather we hope the WG will decide whether > they are relevant or whether our current scope is adequate. > > > > - Does the WG feel that our current Problem Statement scope should > include additional topics, such as those described above and/or others? > > > > Thanks for taking the time to read this message. We look forward to > receiving feedback from all ARMD participants. And we look forward to > seeing some of you in Taipei. > > > > Cheers, > > -Benson & Linda > > > > _______________________________________________ > > armd mailing list > > armd@ietf.org > > https://www.ietf.org/mailman/listinfo/armd > > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd From adalela@cisco.com Sun Nov 13 20:47:38 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0FE6F11E80F8 for ; Sun, 13 Nov 2011 20:47:38 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -8.599 X-Spam-Level: X-Spam-Status: No, score=-8.599 tagged_above=-999 required=5 tests=[AWL=2.000, BAYES_00=-2.599, RCVD_IN_DNSWL_HI=-8] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id p-MYEW9uvwna for ; Sun, 13 Nov 2011 20:47:36 -0800 (PST) Received: from ams-iport-1.cisco.com (ams-iport-1.cisco.com [144.254.224.140]) by ietfa.amsl.com (Postfix) with ESMTP id 1980911E80F2 for ; Sun, 13 Nov 2011 20:47:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=adalela@cisco.com; l=11544; q=dns/txt; s=iport; t=1321246056; x=1322455656; h=mime-version:content-transfer-encoding:subject:date: message-id:in-reply-to:references:from:to; bh=GDZg78BXzlN591/gxDK00KL7NdAddBbKYJzjtfhv3IM=; b=SKMghKHaUpPWqBYfMz/vGhcjhOWvtY1YU2qHOVXRBaZ3K39ysg1QhgZ0 eHpVMpGNhHbZTZh7IClUMtECxVpwcILT5AW74do2ttNzUaMLKauLXBQaA LsEj/dDPRIIr8aL4SbtruSsmZchRj0Eh3fO0NfgsKqAd8cFaxEYiAJuuV E=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AtYAAOicwE5Io8UR/2dsb2JhbABCmXeQBoEFgXIBAQEEAQEBDwEFDwkKKwgBBhEEAgEIEQEDAQEBCgYXAQYBJh8DBggCBAEKCAgTB4domT4BnUAEiRxjBIgOkWSMPQ X-IronPort-AV: E=Sophos;i="4.69,505,1315180800"; d="scan'208";a="121497628" Received: from bgl-core-2.cisco.com ([72.163.197.17]) by ams-iport-1.cisco.com with ESMTP; 14 Nov 2011 04:47:32 +0000 Received: from xbh-bgl-411.cisco.com (xbh-bgl-411.cisco.com [72.163.129.201]) by bgl-core-2.cisco.com (8.14.3/8.14.3) with ESMTP id pAE4lUEj027623; Mon, 14 Nov 2011 04:47:30 GMT Received: from xmb-bgl-416.cisco.com ([72.163.129.212]) by xbh-bgl-411.cisco.com with Microsoft SMTPSVC(6.0.3790.4675); Mon, 14 Nov 2011 10:17:30 +0530 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Date: Mon, 14 Nov 2011 10:17:28 +0530 Message-ID: <618BE8B40039924EB9AED233D4A09C510265A5F2@XMB-BGL-416.cisco.com> In-Reply-To: <4A95BA014132FF49AE685FAB4B9F17F6120BF946@dfweml506-mbx> X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [armd] ARMD Status and Work Plan Thread-Index: AQHMn11hiEP2PMQnykaHlFs+189VqZWm/dWAgABlfYCAAM9kgIADmzkQ References: <5F6E831B-BFD7-4C83-BD37-2FAE5413C054@cisco.com> <618BE8B40039924EB9AED233D4A09C510265A245@XMB-BGL-416.cisco.com> <4A95BA014132FF49AE685FAB4B9F17F6120BF946@dfweml506-mbx> From: "Ashish Dalela (adalela)" To: "Linda Dunbar" , "Benson Schliesser (bschlies)" , X-OriginalArrivalTime: 14 Nov 2011 04:47:30.0802 (UTC) FILETIME=[846EFD20:01CCA288] Subject: Re: [armd] ARMD Status and Work Plan X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Nov 2011 04:47:38 -0000 Linda, Location resolution isn't necessarily an overlay. Portland/MOOSE do it without overlay by changing L2 headers. In these approaches, address resolution and location resolution are identical. That's an advantage, IMO. Thanks, Ashish -----Original Message----- From: Linda Dunbar [mailto:linda.dunbar@huawei.com]=20 Sent: Saturday, November 12, 2011 1:50 PM To: Ashish Dalela (adalela); Benson Schliesser (bschlies); armd@ietf.org Subject: RE: [armd] ARMD Status and Work Plan Ashish,=20 You are absolutely right that the "Address Resolution" in data center not only involves IP <-> MAC type of Address resolution (ARP/ND) but also has Host <-> Overlay Edge type of resolution due to the trend of Overlay network in data centers.=20 The question is=20 - should the "host (MAC or IP) <-> Overlay Edge" address resolution be a Section in the " draft-ietf-armd-problem-statement", or a separate draft? Any volunteer to write the draft?=20 At this stage of ARMD, we don't really need to address if solution could be "combined/coupled" or kept separate (because ARMD is still in OpArea). =20 As for "snoop ARP/ND", "conversation learning", etc, I've seen them being used today to reduce the ARP/ND processing required on boundary routers. Therefore, they should be included in the ARMD Best Common Practice Recommendation draft.=20 Linda=20 > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of > Ashish Dalela (adalela) > Sent: Thursday, November 10, 2011 7:05 PM > To: Benson Schliesser (bschlies); armd@ietf.org > Subject: Re: [armd] ARMD Status and Work Plan >=20 >=20 > In the interest of kick-starting a discussion, below are some random > thoughts. >=20 > First, address resolution is comprised of two problems - > - at the level of ARP/ND and > - at the level of Location/Address binding >=20 > These two problems can be combined/coupled or kept separate. It might > be > good to say that there are two types "resolving" and do we want to > combine or keep them separate. Combining has backward compatibility > issues, but it might be worth determining if the benefits warrant that > disruption. >=20 > Second, there are questions about architecture of address resolution - > - distributed at access > - distributed all over (e.g. with a hash) > - centralized at some points (load-balanced) >=20 > There can be a discussion of various models, their pros-and-cons, with > a > recommendation. >=20 > Third, how does the address resolver get populated? > - snoop ARP/ND > - rely on conversation learning > - use protocols to update addresses >=20 > This gets into the design of the mechanism, and has implications for > convergence/reliability. >=20 > Fourth, there are issues of security and manageability > - can anyone resolve anyone (security)? > - how do I know who is resolving whom (which are active flows)? > - is address resolution a self-sustaining system, or operator controls > it (policy)? >=20 > Rather than start with a problem statement, it might be good to start > with questions, then determine if some of them are problems, then > decide > if we really want to solve these problems (some problems are best left > untouched ;-)). >=20 > Thanks, Ashish >=20 >=20 > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of > Benson Schliesser (bschlies) > Sent: Friday, November 11, 2011 12:32 AM > To: armd@ietf.org > Subject: Re: [armd] ARMD Status and Work Plan >=20 > For those of you that might ignore my message as "too long; didn't > read", here is a shorter version just listing the questions: >=20 > - Does the WG feel that our Problem Statement is complete? >=20 > - Does the WG feel that draft-karir-armd-statistics and/or > draft-armd-datacenter-reference-arch should be made WG documents, > incorporated in the Problem Statement, and/or need more work? >=20 > - Does the WG have interest in pursuing further work on the "survey of > existing implementations" and "survey of security" milestones? >=20 > - Does the WG have interest in developing an "ARP/ND implementation" > recommendation, a "how to scale" recommendation, and/or some other > recommendation(s)? >=20 > - Does the WG feel that there are gaps between existing solutions and > the issues described by our Problem Statement? If so, what are the > requirements for a solution to the Problem Statement? >=20 > - Does the WG feel that our current Problem Statement scope should > include additional topics, such as those described [in section 3 below] > and/or others? >=20 > Cheers, > -Benson >=20 >=20 > On Nov 9, 2011, at 10:00 PM, Benson Schliesser wrote: >=20 > > ARMD Participants - > > > > Linda and I have been discussing ARMD's progress against our charter > and planning next steps for the WG, and we would like your feedback. > This topic will be discussed at the upcoming IETF-82 meeting in Taipei. > But even if you plan to attend in person, please provide feedback on > the > mailing list so that everybody can join the discussion. We apologize > for > the length of this message, but hope that you will take the time to > respond to each of the questions below. > > > > 1. CURRENT STATUS OF MILESTONES > > > > According to our charter we have several milestones that are due. > Specifically, we are overdue to publish a Problem Statement and we are > currently due to publish documents on "statistics collection and > behavior analysis", a "survey of existing implementations", and a > "survey of security". > > > > ARMD has a draft for the problem statement > (draft-ietf-armd-problem-statement-00). Also, there is an individual > draft discussing statistics (draft-karir-armd-statistics-01) and there > is an independent draft on datacenter architecture > (draft-armd-datacenter-reference-arch-00). Collectively, these drafts > would seem to satisfy some of our milestones. As a WG we need to decide > on next steps for these documents. > > > > As for the other milestones that are not addressed by the existing > drafts, we must decide how to proceed. There is a comment, about > variations of ARP / ND implementations, in > draft-karir-armd-statistics-01 which might apply to the "survey of > existing implementations" milestone. But we do not have an actual > survey > per se, with details of the various ARP and ND implementations. Also, > to my knowledge we have no contributions that might apply to the > "survey > of security" milestone. The WG needs to decide how to proceed with > these > milestones. > > > > - Does the WG feel that our Problem Statement is complete? > > - Does the WG feel that draft-karir-armd-statistics and/or > draft-armd-datacenter-reference-arch should be made WG documents, > incorporated in the Problem Statement, and/or need more work? > > - Does the WG have interest in pursuing further work on the "survey > of > existing implementations" and "survey of security" milestones? > > > > 2. NEXT STEPS > > > > In addition to the milestones mentioned above, our charter includes > two milestones due in March 2012. These are to document ARMD's > "recommendations" and perform a "gap analysis". > > > > Thus far, the chairs have identified two types of recommendation that > ARMD might consider making. The first is an ARP and/or ND > "implementation" BCP, with recommendations for configuring or tuning > ARP > and/or ND. This would be much easier if we have a completed ARP/ND > implementation survey. The second is an operational "how to scale" > recommendation. As an illustrative example, this might suggest such > options as A) replace ARP/ND with static entries, B) use L2/L3 > segmentation to fit within specified constraints (smaller L2 domains, > L3 > to the access layer, etc), and/or C) deploy ARP/ND proxy functions in > the network. This example isn't meant as a proposal, merely as an > illustration for further discussion. The WG needs to decide what > recommendations to make. > > > > As an aside, I would like to point out that ARP Proxy isn't very well > defined. There are multiple variations of ARP Proxy with different > levels of documentation. As examples of different ARP Proxy behaviors, > please see RFC1027 and draft-shah-armd-arp-reduction-02. I also > recommend becoming familiar with draft-hu-trill-rbridge-esadi and > draft-dunbar-trill-directory-assisted-edge, as well as OpenFlow, the > NVO3 effort, etc. If the WG recommends ARP Proxy as described above, > then we may need to survey existing ARP and/or ND Proxy behaviors. > > > > Once we have documented our recommendations, the WG will perform a > gap > analysis, comparing our recommendations (and the existing solutions) > versus the issues identified by our Problem Statement. If there are > gaps, then the WG should develop a Requirements document, as input to > future work. The development of a solution, based on those requirements, > might happen in a different WG or by a re-chartered ARMD. > > > > - Does the WG have interest in developing an "ARP/ND implementation" > recommendation, a "how to scale" recommendation, and/or some other > recommendation(s)? > > - Does the WG feel that there are gaps between existing solutions and > the issues described by our Problem Statement? If so, what are the > requirements for a solution to the Problem Statement? > > > > 3. OTHER TOPICS TO CONSIDER > > > > Considering the ARMD charter as a whole, we are not limited to > discussion of ARP and ND, and we may consider other Address Resolution > mechanisms that are applicable to massive datacenters. > > > > For example, the work taking place under the name "NVO3" (possibly > including NVGRE, VXLAN, etc) is an example of an overlay approach that > ARMD might consider. Specifically, ARMD might consider issues related > to > "inter-layer" address resolution (mapping "inside" addresses to > "outside" addresses). And/or ARMD might consider issues related to > traditional ARP/ND address resolution within an overlay, etc. (Note > that > ARMD cannot develop overlay solutions, per our current charter, but it > may be appropriate to investigate the operational issues associated > with > them.) > > > > As an additional example, ARMD might consider operational issues > and/or requirements related to address resolution in TRILL campuses, > OpenFlow networks, etc. The chairs have not specifically identified > these as topics for ARMD, but rather we hope the WG will decide whether > they are relevant or whether our current scope is adequate. > > > > - Does the WG feel that our current Problem Statement scope should > include additional topics, such as those described above and/or others? > > > > Thanks for taking the time to read this message. We look forward to > receiving feedback from all ARMD participants. And we look forward to > seeing some of you in Taipei. > > > > Cheers, > > -Benson & Linda > > > > _______________________________________________ > > armd mailing list > > armd@ietf.org > > https://www.ietf.org/mailman/listinfo/armd >=20 > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd From yakov@juniper.net Mon Nov 14 12:46:03 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9B8C01F0CE2; Mon, 14 Nov 2011 12:46:03 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -105.899 X-Spam-Level: X-Spam-Status: No, score=-105.899 tagged_above=-999 required=5 tests=[AWL=-0.500, BAYES_00=-2.599, J_CHICKENPOX_13=0.6, J_CHICKENPOX_32=0.6, RCVD_IN_DNSWL_MED=-4, USER_IN_WHITELIST=-100] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fF0u1QMKUvX8; Mon, 14 Nov 2011 12:46:02 -0800 (PST) Received: from exprod7og116.obsmtp.com (exprod7og116.obsmtp.com [64.18.2.219]) by ietfa.amsl.com (Postfix) with ESMTP id 3F4681F0CD6; Mon, 14 Nov 2011 12:45:32 -0800 (PST) Received: from P-EMHUB01-HQ.jnpr.net ([66.129.224.36]) (using TLSv1) by exprod7ob116.postini.com ([64.18.6.12]) with SMTP ID DSNKTsF963T2URePAxuV5U/Y5Wq8bkaBAZfq@postini.com; Mon, 14 Nov 2011 12:46:02 PST Received: from magenta.juniper.net (172.17.27.123) by P-EMHUB01-HQ.jnpr.net (172.24.192.33) with Microsoft SMTP Server (TLS) id 8.3.213.0; Mon, 14 Nov 2011 12:42:02 -0800 Received: from juniper.net (sapphire.juniper.net [172.17.28.108]) by magenta.juniper.net (8.11.3/8.11.3) with ESMTP id pAEKg1h21336; Mon, 14 Nov 2011 12:42:01 -0800 (PST) (envelope-from yakov@juniper.net) Message-ID: <201111142042.pAEKg1h21336@magenta.juniper.net> To: Linda Dunbar In-Reply-To: <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> X-MH-In-Reply-To: Linda Dunbar message dated "Wed, 09 Nov 2011 20:12:08 +0000." MIME-Version: 1.0 Content-Type: text/plain; charset="x-unknown" Content-ID: <42954.1321303321.1@juniper.net> Content-Transfer-Encoding: quoted-printable Date: Mon, 14 Nov 2011 12:42:01 -0800 From: Yakov Rekhter X-Mailman-Approved-At: Mon, 14 Nov 2011 17:02:23 -0800 Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" , yakov@juniper.net, Pedro Marques Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 14 Nov 2011 20:46:03 -0000 Linda, > Pedro, = > = > You are absolutely right that there is no ARP/ND scaling issue if > IP can be extended to hosts. Even if IP can be extended to Access > switches, there is not much ARP/ND issues. > = > The draft lists down several common data center network designs, > and states that some of the designs don't have ARP/ND scaling > issues (but may have other issues for data centers). > = > That is why I encourage people to read the draft and provides > comments. =46rom 4.2 of the draft: 4.2. Scenario 2: L3 Terminates at the Aggregation Switch In Scenario 2, the L3 network extends only to the aggregation switches (or perhaps to routers that connect to the aggregation switches). The aggregation switches (or the routers that connect to multiple aggregation switches) could terminate multiple distinct IP subnets (e.g., one per VLAN) or one large IP subnet. In order to let hosts belonging to different IP subnets be placed under any access switches, it is necessary for access switches to enable multiple VLANs and aggregation switches to enable some VLANs (or subnets) over many physical ports. This configuration breaks the confinement of the VLAN's broadcast domain and makes it equivalent to all the access switches being part of the same L2 broadcast domain (and IP subnet). Thus, this configuration allows VMs to be moved to servers connected to other access switches, but increases the size of the L2 broadcast domain, which can lead to difficulties outlined below. This is the scenario that is used to justify the need for large L2 domain. = The draft assumes that in order to move a given VM from one server to another, where these two servers are connected to different access switches, *all* the access switches must be configured with the VM's IP subnet, and thus *all* the access switches must be part of the VM's L2 broadcast domain. This is even if at any particular point in time the servers hosting all the VMs of that IP subnet are connected to only a subset of these switches. But is it truly necessary, or could the L2 broadcast domain span only the switches connected to the servers that presently host VMs of the IP subnet ? Moreover, even if all the access switches need to be part of the same L2 broadcast domain, the increase in the size of the L2 broadcast domain in the above scenario is caused by the access switches, not by the number of VMs per L2 domain. The difficulies mentioned in the last sentence of the quoted paragraph are due to ARP, but ARP is generated by VMs, not by the access switches. Given that, how the increase in the size of the L2 broadcast domain *due solely to the access switches*, could increase the amount of ARP traffic that routers have to process ? Yakov. > = > > -----Original Message----- > > From: Pedro Marques [mailto:pedro.r.marques@gmail.com] > > Sent: Wednesday, November 09, 2011 1:52 PM > > To: Linda Dunbar > > Cc: l2vpn@ietf.org; L3VPN WG mailing list; sdnp@lucidvision.com; > > armd@ietf.org > > Subject: Re: Need your action to review draft-ietf-armd-problem- > > statement-00.txt > > = > > Linda, > > I'd like to point out that the problem does not need to be solved if > > only IP connectivity is required. This I-D: > > http://tools.ietf.org/html/draft-marques-l3vpn-end-system-02 describes > > a solution in which address resolution is not required irrespective of > > the location of the traffic destination. Simply put, traffic can be > > routed at each hop. > > = > > As per previous threads in this list, the concept of subnet which is > > of no practical usefulness in this space. Since VMs can be randomly > distributed across the network the subnet does not provide any > > information aggregation value. Thus there is no need to do address > > resolution. > > = > > Pedro. > > = > > On Wed, Nov 9, 2011 at 11:31 AM, Linda Dunbar > > wrote: > > > For those of you who touch upon Data Center networking or server > > > virtualization, be it Overlay, VPN4DC, or Application/Software drive= n > > > Controller for Data Center, Address Resolution is something Data > > Center > > > Gateways =A0will encounter because hosts/applications in data center= s > > do > > > communicate with peers which are not in the same Overlay, outside th= e > > VPN > > > domain, or from general public. ARMD has published its WG problem > > statement > > > draft. Your comments and suggestions are appreciated (send to > > > armd@ietf.org). > > > > > > > > > > > > Thanks, Linda Dunbar > > > > > > > > > > > > --------------------------------------------------------------------= - > > -------------- > > > > > > > > > > > > > > > > > > A New Internet-Draft is available from the on-line Internet-Drafts > > > directories. This draft is a work item of the Address Resolution for > > Massive > > > numbers of hosts in the Data center Working Group of the IETF. > > > > > > > > > > > > =A0=A0=A0=A0=A0=A0=A0 Title=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : Problem = Statement for ARMD > > > > > > =A0=A0=A0=A0=A0=A0=A0 Author(s)=A0=A0=A0=A0=A0=A0 : Thomas Narten > > > > > > =A0=A0=A0=A0=A0=A0=A0 Filename=A0=A0=A0=A0=A0=A0=A0 : draft-ietf-arm= d-problem-statement-00.txt > > > > > > =A0=A0=A0=A0=A0=A0=A0 Pages=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : 11 > > > > > > =A0=A0=A0=A0=A0=A0=A0 Date=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 : 2011-1= 0-17 > > > > > > > > > > > > =A0=A0 This document examines issues related to the massive scaling = of > > data > > > > > > =A0=A0 centers.=A0 Our initial scope is relatively narrow.=A0 Specif= ically, > > we > > > > > > =A0=A0 focus on address resolution (ARP and ND) within the data cent= er. > > > > > > > > > > > > > > > > > > A URL for this Internet-Draft is: > > > > > > http://www.ietf.org/internet-drafts/draft-ietf-armd-problem- > > statement-00.txt > > > > > > > > > > > > Internet-Drafts are also available by anonymous FTP at: > > > > > > ftp://ftp.ietf.org/internet-drafts/ > > > > > > > > > > > > This Internet-Draft can be retrieved at: > > > > > > ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-statement= - > > 00.txt > > > > > > > = From bschlies@cisco.com Mon Nov 14 17:51:21 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9C9CB11E80CC for ; Mon, 14 Nov 2011 17:51:21 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.349 X-Spam-Level: X-Spam-Status: No, score=-6.349 tagged_above=-999 required=5 tests=[AWL=0.250, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7w4uxC+YoIiA for ; Mon, 14 Nov 2011 17:51:21 -0800 (PST) Received: from mtv-iport-2.cisco.com (mtv-iport-2.cisco.com [173.36.130.13]) by ietfa.amsl.com (Postfix) with ESMTP id 0842A11E817C for ; Mon, 14 Nov 2011 17:51:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=bschlies@cisco.com; l=202; q=dns/txt; s=iport; t=1321321881; x=1322531481; h=from:content-transfer-encoding:subject:date:message-id: to:mime-version; bh=hl2Shl7jdRFWJCgRLOy1UTv8HErwqISUPAV+RCtXGo0=; b=klEw7kg5vLaU2GVX2vgpPG3US31QTOr+N7XUWip0tBc0pKJbYgJvrvpI 1hhpfO90Jwh9l1P9PGpaHNC0Yfe8OlUGnuGmH1DDu+pee6lgySiDY2R08 zA4Yh54pO8U5ZxXXkv9b0mQBHKiBxToI3H74AEiKYFjJrEtRzvbB15xha 4=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AvwEAGDEwU6rRDoJ/2dsb2JhbABEqWmBBYILASeCMqIJgSYBnn6GaoIyYwSIDowgkgY X-IronPort-AV: E=Sophos;i="4.69,512,1315180800"; d="scan'208";a="14234228" Received: from mtv-core-4.cisco.com ([171.68.58.9]) by mtv-iport-2.cisco.com with ESMTP; 15 Nov 2011 01:51:21 +0000 Received: from dhcp-15f3.meeting.ietf.org (sjc-vpn7-594.cisco.com [10.21.146.82]) by mtv-core-4.cisco.com (8.14.3/8.14.3) with ESMTP id pAF1pKqK025113 for ; Tue, 15 Nov 2011 01:51:20 GMT From: Benson Schliesser Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Date: Tue, 15 Nov 2011 09:51:19 +0800 Message-Id: <6FFED1A6-D54D-4890-9384-87C0544B5915@cisco.com> To: armd@ietf.org Mime-Version: 1.0 (Apple Message framework v1084) X-Mailer: Apple Mail (2.1084) Subject: [armd] notes, jabber scribe for ARMD meeting today X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2011 01:51:21 -0000 We need volunteers for taking notes and scribing to jabber during = today's ARMD meeting. If you are able and willing, please let either of = the chairs know in advance. Thanks, -Benson & Linda From skh@ndzh.com Mon Nov 14 20:28:58 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2349311E80A4 for ; Mon, 14 Nov 2011 20:28:58 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.018 X-Spam-Level: X-Spam-Status: No, score=0.018 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888, HELO_MISMATCH_COM=0.553, HOST_MISMATCH_NET=0.311, RDNS_DYNAMIC=0.1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DoB7xcdhdA4d for ; Mon, 14 Nov 2011 20:28:57 -0800 (PST) Received: from hickoryhill-consulting.com (63-208-161-201.digitalrealm.net [63.208.161.201]) by ietfa.amsl.com (Postfix) with ESMTP id 8C5E111E813A for ; Mon, 14 Nov 2011 20:28:57 -0800 (PST) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=130.129.21.97; Received: from SKHPERSONALLT (unverified [130.129.21.97]) by hickoryhill-consulting.com (SurgeMail 5.2a) with ESMTP id 2841756-1945496 for multiple; Mon, 14 Nov 2011 23:28:54 -0500 From: "Susan Hares" To: "'Benson Schliesser'" , References: <6FFED1A6-D54D-4890-9384-87C0544B5915@cisco.com> In-Reply-To: <6FFED1A6-D54D-4890-9384-87C0544B5915@cisco.com> Date: Mon, 14 Nov 2011 23:28:57 -0500 Message-ID: <00b701cca34f$19ebcf10$4dc36d30$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcyjORPyZA4GhNOXTzi8+FX8f6BZlQAFA++A Content-language: en-us X-Authenticated-User: skh@ndzh.com Subject: Re: [armd] notes, jabber scribe for ARMD meeting today X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2011 04:28:58 -0000 I am willing to volunteer. Sue -----Original Message----- From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of Benson Schliesser Sent: Monday, November 14, 2011 8:51 PM To: armd@ietf.org Subject: [armd] notes, jabber scribe for ARMD meeting today We need volunteers for taking notes and scribing to jabber during today's ARMD meeting. If you are able and willing, please let either of the chairs know in advance. Thanks, -Benson & Linda _______________________________________________ armd mailing list armd@ietf.org https://www.ietf.org/mailman/listinfo/armd From bschlies@cisco.com Mon Nov 14 22:13:54 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B589C11E8291 for ; Mon, 14 Nov 2011 22:13:54 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.364 X-Spam-Level: X-Spam-Status: No, score=-6.364 tagged_above=-999 required=5 tests=[AWL=0.235, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id G0fQV4tpPqZi for ; Mon, 14 Nov 2011 22:13:54 -0800 (PST) Received: from mtv-iport-4.cisco.com (mtv-iport-4.cisco.com [173.36.130.15]) by ietfa.amsl.com (Postfix) with ESMTP id 379D411E811B for ; Mon, 14 Nov 2011 22:13:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=bschlies@cisco.com; l=881; q=dns/txt; s=iport; t=1321337634; x=1322547234; h=mime-version:subject:from:in-reply-to:date: content-transfer-encoding:message-id:references:to; bh=Fj3pItbjfv5y6hmFAK1HgKZwnq+P4BGJhx254Irgsio=; b=FDdl+OcNlhaShOUeGqjyfPwZR41QlwM26SQ5Nr7RgAp3iM8mJXhmWvEe mDzeRYkFoFhFSGpZlMEnPZX7DGlCppSu1qJ2fi53FfoZTMk+jhRaMSiFt kRLmz2W6/5KQpdwfg0NkXE0YEY8ZrVkLst9Rl1WdSB0MwVi7FHj+CAwxg M=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApkAAE4Cwk6rRDoH/2dsb2JhbABEmWSQBYEFgXIBAQEDAQEBAQ8BJzQQBwQLDgMEAQEoBycfCQgGARIih2AInFsBnn4EiSFjBIgPjCGSBw X-IronPort-AV: E=Sophos;i="4.69,513,1315180800"; d="scan'208";a="14320515" Received: from mtv-core-2.cisco.com ([171.68.58.7]) by mtv-iport-4.cisco.com with ESMTP; 15 Nov 2011 06:13:54 +0000 Received: from dhcp-15f3.meeting.ietf.org ([10.21.75.156]) by mtv-core-2.cisco.com (8.14.3/8.14.3) with ESMTP id pAF6DqjB025369; Tue, 15 Nov 2011 06:13:53 GMT Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1084) From: Benson Schliesser In-Reply-To: <00b701cca34f$19ebcf10$4dc36d30$@com> Date: Tue, 15 Nov 2011 14:13:52 +0800 Content-Transfer-Encoding: quoted-printable Message-Id: <730334A3-4A40-47E2-BF4A-FE3B413430CC@cisco.com> References: <6FFED1A6-D54D-4890-9384-87C0544B5915@cisco.com> <00b701cca34f$19ebcf10$4dc36d30$@com> To: Susan Hares , armd@ietf.org X-Mailer: Apple Mail (2.1084) Subject: Re: [armd] notes, jabber scribe for ARMD meeting today X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2011 06:13:54 -0000 Thanks, Sue. Anybody else? In a perfect world we would have 2 more volunteers, = another note-taker and a jabber scribe. Cheers, -Benson On Nov 15, 2011, at 12:28 PM, Susan Hares wrote: > I am willing to volunteer. >=20 > Sue=20 >=20 > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf = Of > Benson Schliesser > Sent: Monday, November 14, 2011 8:51 PM > To: armd@ietf.org > Subject: [armd] notes, jabber scribe for ARMD meeting today >=20 > We need volunteers for taking notes and scribing to jabber during = today's > ARMD meeting. If you are able and willing, please let either of the = chairs > know in advance. >=20 > Thanks, > -Benson & Linda >=20 > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd >=20 From skh@ndzh.com Mon Nov 14 22:21:00 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5F21A1F0CBB; Mon, 14 Nov 2011 22:21:00 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.618 X-Spam-Level: X-Spam-Status: No, score=0.618 tagged_above=-999 required=5 tests=[AWL=-0.600, BAYES_00=-2.599, FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888, HELO_MISMATCH_COM=0.553, HOST_MISMATCH_NET=0.311, J_CHICKENPOX_13=0.6, J_CHICKENPOX_32=0.6, RDNS_DYNAMIC=0.1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id bOsSRqIJe+tN; Mon, 14 Nov 2011 22:20:59 -0800 (PST) Received: from hickoryhill-consulting.com (63-208-161-201.digitalrealm.net [63.208.161.201]) by ietfa.amsl.com (Postfix) with ESMTP id E454D1F0C38; Mon, 14 Nov 2011 22:20:58 -0800 (PST) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=130.129.21.97; Received: from SKHPERSONALLT (unverified [130.129.21.97]) by hickoryhill-consulting.com (SurgeMail 5.2a) with ESMTP id 2841903-1945496 for multiple; Tue, 15 Nov 2011 01:20:16 -0500 From: "Susan Hares" To: "'Yakov Rekhter'" , "'Linda Dunbar'" References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> <201111142042.pAEKg1h21336@magenta.juniper.net> In-Reply-To: <201111142042.pAEKg1h21336@magenta.juniper.net> Date: Tue, 15 Nov 2011 01:20:11 -0500 Message-ID: <011101cca35e$a93be5b0$fbb3b110$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcyjMjzC4vOw03vySeSIsLrY/t0kawAIGRRw Content-language: en-us X-Authenticated-User: skh@ndzh.com Cc: l2vpn@ietf.org, sdnp@lucidvision.com, 'Pedro Marques' , 'L3VPN WG mailing list' , armd@ietf.org Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2011 06:21:00 -0000 Yakov: We are not trying to justify any definition we have, but to report what DC operators have given as the problem in an OPS draft. In many ways, the text has been successful by having you comment on this point so that operators can consider in depth this scenario. With all due respect to you as a grand master of word-smithing, let me restate some of the argument so that I can attempt to inspire discussion. The "all" in this discussion indicates "all" within this domain which crosses the VLANs in the text. The 802.1q VLAN mechanism provides some scoping of broadcast and unicast for an L2 grouping. The IP Subset provides a scoping for scoping for IP (L3 grouping). ARP maps the L2 grouping to the l3 grouping. The growth in the number of nodes (VM or access) in the combined groupings of mapped nodes are the problem. If you want to restrict nodes within this at L2 or L3, you must find a means to determine the L2 grouping. The mapping of the IP to MAC Address is scoped by the combination of L2/L3 grouping. So.. at some point the VM or the real nodes reach an "aggregation grouping" at the access switch or the VMs forming an access switch. This grouping point is stressed by the underlying growth of L2/L3 node combination. On the ARMD BOF/List, Manish Karir (Merit) published a study in looking at the ARP problem using VMs groupings. Some large scale operators stated the VM aggregation I described above did not represent a case widely used. Therefore the discussion focused on the deployed access switches, servers, and VMs as described in the text. Please refer to past discussion from Igor G. on this list or his drafts on solutions/problems. Also, you can refer to NANOG session on this. Yakov - let me know of I am unclear or just misunderstood your discussion point. Linda, Manish, and Igor let me know if I was incorrect in anything I said. Hopefully, I've given the discussion a push. If nothing else, it will Sue -----Original Message----- From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of Yakov Rekhter Sent: Monday, November 14, 2011 3:42 PM To: Linda Dunbar Cc: l2vpn@ietf.org; sdnp@lucidvision.com; L3VPN WG mailing list; armd@ietf.org; yakov@juniper.net; Pedro Marques Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt Linda, > Pedro, > > You are absolutely right that there is no ARP/ND scaling issue if IP > can be extended to hosts. Even if IP can be extended to Access > switches, there is not much ARP/ND issues. > > The draft lists down several common data center network designs, and > states that some of the designs don't have ARP/ND scaling issues (but > may have other issues for data centers). > > That is why I encourage people to read the draft and provides > comments. >From 4.2 of the draft: 4.2. Scenario 2: L3 Terminates at the Aggregation Switch In Scenario 2, the L3 network extends only to the aggregation switches (or perhaps to routers that connect to the aggregation switches). The aggregation switches (or the routers that connect to multiple aggregation switches) could terminate multiple distinct IP subnets (e.g., one per VLAN) or one large IP subnet. In order to let hosts belonging to different IP subnets be placed under any access switches, it is necessary for access switches to enable multiple VLANs and aggregation switches to enable some VLANs (or subnets) over many physical ports. This configuration breaks the confinement of the VLAN's broadcast domain and makes it equivalent to all the access switches being part of the same L2 broadcast domain (and IP subnet). Thus, this configuration allows VMs to be moved to servers connected to other access switches, but increases the size of the L2 broadcast domain, which can lead to difficulties outlined below. This is the scenario that is used to justify the need for large L2 domain. The draft assumes that in order to move a given VM from one server to another, where these two servers are connected to different access switches, *all* the access switches must be configured with the VM's IP subnet, and thus *all* the access switches must be part of the VM's L2 broadcast domain. This is even if at any particular point in time the servers hosting all the VMs of that IP subnet are connected to only a subset of these switches. But is it truly necessary, or could the L2 broadcast domain span only the switches connected to the servers that presently host VMs of the IP subnet ? Moreover, even if all the access switches need to be part of the same L2 broadcast domain, the increase in the size of the L2 broadcast domain in the above scenario is caused by the access switches, not by the number of VMs per L2 domain. The difficulies mentioned in the last sentence of the quoted paragraph are due to ARP, but ARP is generated by VMs, not by the access switches. Given that, how the increase in the size of the L2 broadcast domain *due solely to the access switches*, could increase the amount of ARP traffic that routers have to process ? Yakov. > > > -----Original Message----- > > From: Pedro Marques [mailto:pedro.r.marques@gmail.com] > > Sent: Wednesday, November 09, 2011 1:52 PM > > To: Linda Dunbar > > Cc: l2vpn@ietf.org; L3VPN WG mailing list; sdnp@lucidvision.com; > > armd@ietf.org > > Subject: Re: Need your action to review draft-ietf-armd-problem- > > statement-00.txt > > > > Linda, > > I'd like to point out that the problem does not need to be solved if > > only IP connectivity is required. This I-D: > > http://tools.ietf.org/html/draft-marques-l3vpn-end-system-02 > > describes a solution in which address resolution is not required > > irrespective of the location of the traffic destination. Simply put, > > traffic can be routed at each hop. > > > > As per previous threads in this list, the concept of subnet which is > > of no practical usefulness in this space. Since VMs can be randomly > distributed across the network the subnet does not provide any > > information aggregation value. Thus there is no need to do address > > resolution. > > > > Pedro. > > > > On Wed, Nov 9, 2011 at 11:31 AM, Linda Dunbar > > > > wrote: > > > For those of you who touch upon Data Center networking or server > > > virtualization, be it Overlay, VPN4DC, or Application/Software > > > driven Controller for Data Center, Address Resolution is something > > > Data > > Center > > > Gateways will encounter because hosts/applications in data > > > centers > > do > > > communicate with peers which are not in the same Overlay, outside > > > the > > VPN > > > domain, or from general public. ARMD has published its WG problem > > statement > > > draft. Your comments and suggestions are appreciated (send to > > > armd@ietf.org). > > > > > > > > > > > > Thanks, Linda Dunbar > > > > > > > > > > > > ------------------------------------------------------------------ > > > --- > > -------------- > > > > > > > > > > > > > > > > > > A New Internet-Draft is available from the on-line Internet-Drafts > > > directories. This draft is a work item of the Address Resolution > > > for > > Massive > > > numbers of hosts in the Data center Working Group of the IETF. > > > > > > > > > > > > Title : Problem Statement for ARMD > > > > > > Author(s) : Thomas Narten > > > > > > Filename : draft-ietf-armd-problem-statement-00.txt > > > > > > Pages : 11 > > > > > > Date : 2011-10-17 > > > > > > > > > > > > This document examines issues related to the massive scaling of > > data > > > > > > centers. Our initial scope is relatively narrow. > > > Specifically, > > we > > > > > > focus on address resolution (ARP and ND) within the data center. > > > > > > > > > > > > > > > > > > A URL for this Internet-Draft is: > > > > > > http://www.ietf.org/internet-drafts/draft-ietf-armd-problem- > > statement-00.txt > > > > > > > > > > > > Internet-Drafts are also available by anonymous FTP at: > > > > > > ftp://ftp.ietf.org/internet-drafts/ > > > > > > > > > > > > This Internet-Draft can be retrieved at: > > > > > > ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-stateme > > > nt- > > 00.txt > > > > > > > From pedro.r.marques@gmail.com Tue Nov 15 09:47:02 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9834F1F0C3C; Tue, 15 Nov 2011 09:47:02 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.395 X-Spam-Level: X-Spam-Status: No, score=-2.395 tagged_above=-999 required=5 tests=[AWL=0.004, BAYES_00=-2.599, J_CHICKENPOX_13=0.6, J_CHICKENPOX_32=0.6, RCVD_IN_DNSWL_LOW=-1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id xIiJflHPKYg5; Tue, 15 Nov 2011 09:46:58 -0800 (PST) Received: from mail-iy0-f172.google.com (mail-iy0-f172.google.com [209.85.210.172]) by ietfa.amsl.com (Postfix) with ESMTP id 44DCE1F0C41; Tue, 15 Nov 2011 09:46:52 -0800 (PST) Received: by iaeo4 with SMTP id o4so11278303iae.31 for ; Tue, 15 Nov 2011 09:46:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=eQpeXGh8hWjyUGWx6RruiKeBml2xuTC5z7YrtWFs6kk=; b=A8SQVpxNKnZX3GvTxzZ8Os1IYGnye0VhfDCZ2vCBmbcZtcoJsNUvy5m09dmvXZMsew znXT2gPsT4c6tVDmo0v1ZaPKik7YZ4pnjpmnn74gWowQJX4WdJe6X+cxoP6HjaOENhw4 1xVOodN8nr+XcXVZkDyqzoA/2JK53Tsgs3qE8= MIME-Version: 1.0 Received: by 10.231.8.143 with SMTP id h15mr6454119ibh.94.1321379211837; Tue, 15 Nov 2011 09:46:51 -0800 (PST) Received: by 10.231.12.2 with HTTP; Tue, 15 Nov 2011 09:46:51 -0800 (PST) In-Reply-To: <011101cca35e$a93be5b0$fbb3b110$@com> References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> <201111142042.pAEKg1h21336@magenta.juniper.net> <011101cca35e$a93be5b0$fbb3b110$@com> Date: Tue, 15 Nov 2011 09:46:51 -0800 Message-ID: From: Pedro Marques To: Susan Hares Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: l2vpn@ietf.org, sdnp@lucidvision.com, L3VPN WG mailing list , armd@ietf.org, Yakov Rekhter Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2011 17:47:02 -0000 Sue, I think the following statements capture a common configuration for small / low-bandwidth (1g) / private DCs: - VLANs are used for isolation. - These vlans are locally scoped to a pair of aggregation switches. - They are statically configured at the access switches. - Traffic exchange between vlans is done at the aggregation switches (often subject to service modules). The above is not contentious, i presume. I think that everyone would also agree that: - It is highly desirable to be able to have an application (a process running on a server) to be placed in an arbitrary location of the DC. (which conflicts with vlan locality). - It is expected that the number of application processes that participate in the same isolation domain will grow significantly (due to external factors related to application design). - It is expected that the bandwidth requirements for severs will increase by an order of magnitude (along with higher server utilization). I hope we all agree so far. Now from the 2 sets of premises above it does not directly follow that the answer is to build larger and larger L2 domains. I do understand that to be a common perception but that is actually not necessary and imho not useful. The fundamental misconception is that the application processes (in a VM or other wise) do need VLANs. They do not. They need connectivity; both within an inner level of isolation (today's vlan) and to other services in the data center (which today is routed often subject to security policies). An example of the later would be a set of database servers; database servers are often expensive and shared among different applications. In order to be able to place any VM anywhere, the VM needs to have direct connectivity to multiple isolation domains. isolation domains which are today modeled as L2 and isolation domains that are today modeled as L3. The concept of an L2/L3 boundary is not useful if you assume that a VM can be placed in an arbitrary location. Anywhere you choose to put that "boundary": top-of-rack, aggregation, etc, you are likely to find that the boundary gets in the way of the VMs being able to be located anywhere. At least without causing traffic to cross the core twice which is a non-starter. So to actually solve the problem according to requirements one needs to get rid of the boundary and move to a solution that is all L2 or all L3. And ARP/ND is really not a relevant problem. With an "L2" solution tends to come the assumption that there is a single "isolation" domain... and a single subnet, which doesn't really cut it. "L3" and specially BGP-based IP/VPNs natively support the concept of direct traffic exchanges between different isolation domains, subject to policy. Even if you do decide to select an L2 approach that limits an application to a single isolation domain, the L2 mac information will need to be present at every switch where that L2 VLAN is present. If you follow an approach where there is core-interface to core-interface mac-learning (VXLAN for instance) then indeed you do have ARP broadcasts being used to update forwarding tables. But approaches such as EVPN can perform learning on the edge interface only eliminating the need to generate ARP broadcasts. It is entirely likely that the approaches that attempt to provide for large broadcast domains already contain a solution for L2 address discovery. Conversely it is rather unclear that you can address the ARP/ND scaling issue independently of the design of the L2 solution itself. regards, Pedro. On Mon, Nov 14, 2011 at 10:20 PM, Susan Hares wrote: > Yakov: > > We are not trying to justify any definition we have, but to report what D= C > operators have given as the problem in an OPS draft. > > In many ways, the text has been successful by having you comment on this > point so that operators can consider in depth this scenario. > > With all due respect to you as a grand master of word-smithing, let me > restate some of the argument so that I can attempt to inspire discussion. > > The "all" in this discussion indicates "all" within this domain which > crosses the VLANs in the text. The 802.1q VLAN mechanism provides some > scoping of broadcast and unicast for an L2 grouping. The IP Subset provid= es > a scoping for scoping for IP (L3 grouping). ARP maps the L2 grouping to t= he > l3 grouping. The growth in the number of nodes (VM or access) in the > combined groupings of mapped nodes are the problem. > > If you want to restrict nodes within this at L2 or L3, you must find a me= ans > to determine the L2 grouping. The mapping of the IP to MAC Address is sco= ped > by the combination of L2/L3 grouping. > > So.. at some point the VM or the real nodes reach an "aggregation groupin= g" > at the access switch or the VMs forming an access switch. This grouping > point is stressed by the underlying growth of L2/L3 node combination. On = the > ARMD BOF/List, Manish Karir (Merit) published a study in looking at the A= RP > problem using VMs groupings. > > Some large scale operators stated the VM aggregation I described above di= d > not represent a case widely used. Therefore the discussion focused on the > deployed access switches, servers, and VMs as described in the text. =A0P= lease > refer to past discussion from Igor G. on this list or his drafts on > solutions/problems. Also, you can refer to NANOG session on this. > > Yakov - let me know of I am unclear or just misunderstood your discussion > point. Linda, Manish, and Igor let me know if I was incorrect in anything= I > said. > > Hopefully, I've given the discussion a push. If nothing else, it will > > Sue > > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of > Yakov Rekhter > Sent: Monday, November 14, 2011 3:42 PM > To: Linda Dunbar > Cc: l2vpn@ietf.org; sdnp@lucidvision.com; L3VPN WG mailing list; > armd@ietf.org; yakov@juniper.net; Pedro Marques > Subject: Re: [armd] Need your action to review > draft-ietf-armd-problem-statement-00.txt > > Linda, > >> Pedro, >> >> You are absolutely right that there is no ARP/ND scaling issue if IP >> can be extended to hosts. Even if IP can be extended to Access >> switches, there is not much ARP/ND issues. >> >> The draft lists down several common data center network designs, and >> states that some of the designs don't have ARP/ND scaling issues (but >> may have other issues for data centers). >> >> That is why I encourage people to read the draft and provides >> comments. > > From 4.2 of the draft: > > =A04.2. =A0Scenario 2: L3 Terminates at the Aggregation Switch > > =A0 In Scenario 2, the L3 network extends only to the aggregation > =A0 switches (or perhaps to routers that connect to the aggregation > =A0 switches). =A0The aggregation switches (or the routers that connect t= o > =A0 multiple aggregation switches) could terminate multiple distinct IP > =A0 subnets (e.g., one per VLAN) or one large IP subnet. =A0In order to l= et > =A0 hosts belonging to different IP subnets be placed under any access > =A0 switches, it is necessary for access switches to enable multiple > =A0 VLANs and aggregation switches to enable some VLANs (or subnets) over > =A0 many physical ports. =A0This configuration breaks the confinement of > =A0 the VLAN's broadcast domain and makes it equivalent to all the access > =A0 switches being part of the same L2 broadcast domain (and IP subnet). > =A0 Thus, this configuration allows VMs to be moved to servers connected > =A0 to other access switches, but increases the size of the L2 broadcast > =A0 domain, which can lead to difficulties outlined below. > > This is the scenario that is used to justify the need for large L2 domain= . > > The draft assumes that in order to move a given VM from one server to > another, where these two servers are connected to different access switch= es, > *all* the access switches must be configured with the VM's IP subnet, and > thus *all* the access switches must be part of the VM's L2 broadcast doma= in. > This is even if at any particular point in time the servers hosting all t= he > VMs of that IP subnet are connected to only a subset of these switches. B= ut > is it truly necessary, or could the L2 broadcast domain span only the > switches connected to the servers that presently host VMs of the IP subne= t ? > > Moreover, even if all the access switches need to be part of the same L2 > broadcast domain, the increase in the size of the L2 broadcast domain in = the > above scenario is caused by the access switches, not by the number of VMs > per L2 domain. The difficulies mentioned in the last sentence of the quot= ed > paragraph are due to ARP, but ARP is generated by VMs, not by the access > switches. Given that, how the increase in the size of the L2 broadcast > domain *due solely to the access switches*, could increase the amount of = ARP > traffic that routers have to process ? > > Yakov. > >> >> > -----Original Message----- >> > From: Pedro Marques [mailto:pedro.r.marques@gmail.com] >> > Sent: Wednesday, November 09, 2011 1:52 PM >> > To: Linda Dunbar >> > Cc: l2vpn@ietf.org; L3VPN WG mailing list; sdnp@lucidvision.com; >> > armd@ietf.org >> > Subject: Re: Need your action to review draft-ietf-armd-problem- >> > statement-00.txt >> > >> > Linda, >> > I'd like to point out that the problem does not need to be solved if >> > only IP connectivity is required. This I-D: >> > http://tools.ietf.org/html/draft-marques-l3vpn-end-system-02 >> > describes a solution in which address resolution is not required >> > irrespective of the location of the traffic destination. Simply put, >> > traffic can be routed at each hop. >> > >> > As per previous threads in this list, the concept of subnet which is >> > of no practical usefulness in this space. Since VMs can be randomly >> distributed across the network the subnet does not provide any >> > information aggregation value. Thus there is no need to do address >> > resolution. >> > >> > =A0 Pedro. >> > >> > On Wed, Nov 9, 2011 at 11:31 AM, Linda Dunbar >> > >> > wrote: >> > > For those of you who touch upon Data Center networking or server >> > > virtualization, be it Overlay, VPN4DC, or Application/Software >> > > driven Controller for Data Center, Address Resolution is something >> > > Data >> > Center >> > > Gateways =A0will encounter because hosts/applications in data >> > > centers >> > do >> > > communicate with peers which are not in the same Overlay, outside >> > > the >> > VPN >> > > domain, or from general public. ARMD has published its WG problem >> > statement >> > > draft. Your comments and suggestions are appreciated (send to >> > > armd@ietf.org). >> > > >> > > >> > > >> > > Thanks, Linda Dunbar >> > > >> > > >> > > >> > > ------------------------------------------------------------------ >> > > --- >> > -------------- >> > > >> > > >> > > >> > > >> > > >> > > A New Internet-Draft is available from the on-line Internet-Drafts >> > > directories. This draft is a work item of the Address Resolution >> > > for >> > Massive >> > > numbers of hosts in the Data center Working Group of the IETF. >> > > >> > > >> > > >> > > =A0 =A0 =A0 =A0 Title =A0 =A0 =A0 =A0 =A0 : Problem Statement for AR= MD >> > > >> > > =A0 =A0 =A0 =A0 Author(s) =A0 =A0 =A0 : Thomas Narten >> > > >> > > =A0 =A0 =A0 =A0 Filename =A0 =A0 =A0 =A0: draft-ietf-armd-problem-st= atement-00.txt >> > > >> > > =A0 =A0 =A0 =A0 Pages =A0 =A0 =A0 =A0 =A0 : 11 >> > > >> > > =A0 =A0 =A0 =A0 Date =A0 =A0 =A0 =A0 =A0 =A0: 2011-10-17 >> > > >> > > >> > > >> > > =A0 =A0This document examines issues related to the massive scaling = of >> > data >> > > >> > > =A0 =A0centers. =A0Our initial scope is relatively narrow. >> > > Specifically, >> > we >> > > >> > > =A0 =A0focus on address resolution (ARP and ND) within the data cent= er. >> > > >> > > >> > > >> > > >> > > >> > > A URL for this Internet-Draft is: >> > > >> > > http://www.ietf.org/internet-drafts/draft-ietf-armd-problem- >> > statement-00.txt >> > > >> > > >> > > >> > > Internet-Drafts are also available by anonymous FTP at: >> > > >> > > ftp://ftp.ietf.org/internet-drafts/ >> > > >> > > >> > > >> > > This Internet-Draft can be retrieved at: >> > > >> > > ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-stateme >> > > nt- >> > 00.txt >> > > >> > > >> > > From skh@ndzh.com Tue Nov 15 10:58:41 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 388C21F0C5B; Tue, 15 Nov 2011 10:58:41 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 1.237 X-Spam-Level: * X-Spam-Status: No, score=1.237 tagged_above=-999 required=5 tests=[AWL=-0.600, BAYES_00=-2.599, FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888, HELO_MISMATCH_COM=0.553, HOST_MISMATCH_NET=0.311, J_CHICKENPOX_13=0.6, J_CHICKENPOX_32=0.6, RCVD_IN_SORBS_WEB=0.619, RDNS_DYNAMIC=0.1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 7ZUyBZjFMjyU; Tue, 15 Nov 2011 10:58:36 -0800 (PST) Received: from hickoryhill-consulting.com (63-208-161-201.digitalrealm.net [63.208.161.201]) by ietfa.amsl.com (Postfix) with ESMTP id 7D9E01F0C4B; Tue, 15 Nov 2011 10:58:35 -0800 (PST) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=61.220.70.183; Received: from SKHPERSONALLT (unverified [61.220.70.183]) by hickoryhill-consulting.com (SurgeMail 5.2a) with ESMTP id 2843982-1945496 for multiple; Tue, 15 Nov 2011 13:57:54 -0500 From: "Susan Hares" To: "'Pedro Marques'" References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> <201111142042.pAEKg1h21336@magenta.juniper.net> <011101cca35e$a93be5b0$fbb3b110$@com> In-Reply-To: Date: Tue, 15 Nov 2011 13:57:52 -0500 Message-ID: <00b601cca3c8$7c40ccf0$74c266d0$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcyjvpU//bdJMvZzS0+sBxAD7KLNVAACXqtw Content-Language: en-us X-Authenticated-User: skh@ndzh.com Cc: l2vpn@ietf.org, sdnp@lucidvision.com, 'L3VPN WG mailing list' , armd@ietf.org, 'Yakov Rekhter' Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2011 18:58:41 -0000 Pedro:=20 In all politeness, let me acknowledge your message. I will respond after = I see if Igor (Yahoo) or other DC/Carrier operators will comment on their viewpoints. Best wishes,=20 Sue=20 -----Original Message----- From: Pedro Marques [mailto:pedro.r.marques@gmail.com]=20 Sent: Tuesday, November 15, 2011 12:47 PM To: Susan Hares Cc: Yakov Rekhter; Linda Dunbar; l2vpn@ietf.org; sdnp@lucidvision.com; = L3VPN WG mailing list; armd@ietf.org Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt Sue, I think the following statements capture a common configuration for small / low-bandwidth (1g) / private DCs: - VLANs are used for isolation. - These vlans are locally scoped to a pair of aggregation switches. - They are statically configured at the access switches. - Traffic exchange between vlans is done at the aggregation switches (often subject to service modules). The above is not contentious, i presume. I think that everyone would also agree that: - It is highly desirable to be able to have an application (a process running on a server) to be placed in an arbitrary location of the DC. (which conflicts with vlan locality). - It is expected that the number of application processes that participate in the same isolation domain will grow significantly (due to external factors related to application design). - It is expected that the bandwidth requirements for severs will increase by an order of magnitude (along with higher server utilization). I hope we all agree so far. Now from the 2 sets of premises above it does not directly follow that the answer is to build larger and larger L2 domains. I do understand that to be a common perception but that is actually not necessary and imho not useful. The fundamental misconception is that the application processes (in a VM or other wise) do need VLANs. They do not. They need connectivity; both within an inner level of isolation (today's vlan) and to other services in the data center (which today is routed often subject to security policies). An example of the later would be a set of database servers; database servers are often expensive and shared among different applications. In order to be able to place any VM anywhere, the VM needs to have direct connectivity to multiple isolation domains. isolation domains which are today modeled as L2 and isolation domains that are today modeled as L3. The concept of an L2/L3 boundary is not useful if you assume that a VM can be placed in an arbitrary location. Anywhere you choose to put that "boundary": top-of-rack, aggregation, etc, you are likely to find that the boundary gets in the way of the VMs being able to be located anywhere. At least without causing traffic to cross the core twice which is a non-starter. So to actually solve the problem according to requirements one needs to get rid of the boundary and move to a solution that is all L2 or all L3. And ARP/ND is really not a relevant problem. With an "L2" solution tends to come the assumption that there is a single "isolation" domain... and a single subnet, which doesn't really cut it. "L3" and specially BGP-based IP/VPNs natively support the concept of direct traffic exchanges between different isolation domains, subject to policy. Even if you do decide to select an L2 approach that limits an application to a single isolation domain, the L2 mac information will need to be present at every switch where that L2 VLAN is present. If you follow an approach where there is core-interface to core-interface mac-learning (VXLAN for instance) then indeed you do have ARP broadcasts being used to update forwarding tables. But approaches such as EVPN can perform learning on the edge interface only eliminating the need to generate ARP broadcasts. It is entirely likely that the approaches that attempt to provide for large broadcast domains already contain a solution for L2 address discovery. Conversely it is rather unclear that you can address the ARP/ND scaling issue independently of the design of the L2 solution itself. regards, Pedro. On Mon, Nov 14, 2011 at 10:20 PM, Susan Hares wrote: > Yakov: > > We are not trying to justify any definition we have, but to report = what DC > operators have given as the problem in an OPS draft. > > In many ways, the text has been successful by having you comment on = this > point so that operators can consider in depth this scenario. > > With all due respect to you as a grand master of word-smithing, let me > restate some of the argument so that I can attempt to inspire = discussion. > > The "all" in this discussion indicates "all" within this domain which > crosses the VLANs in the text. The 802.1q VLAN mechanism provides some > scoping of broadcast and unicast for an L2 grouping. The IP Subset provides > a scoping for scoping for IP (L3 grouping). ARP maps the L2 grouping = to the > l3 grouping. The growth in the number of nodes (VM or access) in the > combined groupings of mapped nodes are the problem. > > If you want to restrict nodes within this at L2 or L3, you must find a means > to determine the L2 grouping. The mapping of the IP to MAC Address is scoped > by the combination of L2/L3 grouping. > > So.. at some point the VM or the real nodes reach an "aggregation grouping" > at the access switch or the VMs forming an access switch. This = grouping > point is stressed by the underlying growth of L2/L3 node combination. = On the > ARMD BOF/List, Manish Karir (Merit) published a study in looking at = the ARP > problem using VMs groupings. > > Some large scale operators stated the VM aggregation I described above = did > not represent a case widely used. Therefore the discussion focused on = the > deployed access switches, servers, and VMs as described in the text. =A0Please > refer to past discussion from Igor G. on this list or his drafts on > solutions/problems. Also, you can refer to NANOG session on this. > > Yakov - let me know of I am unclear or just misunderstood your = discussion > point. Linda, Manish, and Igor let me know if I was incorrect in = anything I > said. > > Hopefully, I've given the discussion a push. If nothing else, it will > > Sue > > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf = Of > Yakov Rekhter > Sent: Monday, November 14, 2011 3:42 PM > To: Linda Dunbar > Cc: l2vpn@ietf.org; sdnp@lucidvision.com; L3VPN WG mailing list; > armd@ietf.org; yakov@juniper.net; Pedro Marques > Subject: Re: [armd] Need your action to review > draft-ietf-armd-problem-statement-00.txt > > Linda, > >> Pedro, >> >> You are absolutely right that there is no ARP/ND scaling issue if IP >> can be extended to hosts. Even if IP can be extended to Access >> switches, there is not much ARP/ND issues. >> >> The draft lists down several common data center network designs, and >> states that some of the designs don't have ARP/ND scaling issues (but >> may have other issues for data centers). >> >> That is why I encourage people to read the draft and provides >> comments. > > From 4.2 of the draft: > > =A04.2. =A0Scenario 2: L3 Terminates at the Aggregation Switch > > =A0 In Scenario 2, the L3 network extends only to the aggregation > =A0 switches (or perhaps to routers that connect to the aggregation > =A0 switches). =A0The aggregation switches (or the routers that = connect to > =A0 multiple aggregation switches) could terminate multiple distinct = IP > =A0 subnets (e.g., one per VLAN) or one large IP subnet. =A0In order = to let > =A0 hosts belonging to different IP subnets be placed under any access > =A0 switches, it is necessary for access switches to enable multiple > =A0 VLANs and aggregation switches to enable some VLANs (or subnets) = over > =A0 many physical ports. =A0This configuration breaks the confinement = of > =A0 the VLAN's broadcast domain and makes it equivalent to all the = access > =A0 switches being part of the same L2 broadcast domain (and IP = subnet). > =A0 Thus, this configuration allows VMs to be moved to servers = connected > =A0 to other access switches, but increases the size of the L2 = broadcast > =A0 domain, which can lead to difficulties outlined below. > > This is the scenario that is used to justify the need for large L2 = domain. > > The draft assumes that in order to move a given VM from one server to > another, where these two servers are connected to different access switches, > *all* the access switches must be configured with the VM's IP subnet, = and > thus *all* the access switches must be part of the VM's L2 broadcast domain. > This is even if at any particular point in time the servers hosting = all the > VMs of that IP subnet are connected to only a subset of these = switches. But > is it truly necessary, or could the L2 broadcast domain span only the > switches connected to the servers that presently host VMs of the IP = subnet ? > > Moreover, even if all the access switches need to be part of the same = L2 > broadcast domain, the increase in the size of the L2 broadcast domain = in the > above scenario is caused by the access switches, not by the number of = VMs > per L2 domain. The difficulies mentioned in the last sentence of the quoted > paragraph are due to ARP, but ARP is generated by VMs, not by the = access > switches. Given that, how the increase in the size of the L2 broadcast > domain *due solely to the access switches*, could increase the amount = of ARP > traffic that routers have to process ? > > Yakov. > >> >> > -----Original Message----- >> > From: Pedro Marques [mailto:pedro.r.marques@gmail.com] >> > Sent: Wednesday, November 09, 2011 1:52 PM >> > To: Linda Dunbar >> > Cc: l2vpn@ietf.org; L3VPN WG mailing list; sdnp@lucidvision.com; >> > armd@ietf.org >> > Subject: Re: Need your action to review draft-ietf-armd-problem- >> > statement-00.txt >> > >> > Linda, >> > I'd like to point out that the problem does not need to be solved = if >> > only IP connectivity is required. This I-D: >> > http://tools.ietf.org/html/draft-marques-l3vpn-end-system-02 >> > describes a solution in which address resolution is not required >> > irrespective of the location of the traffic destination. Simply = put, >> > traffic can be routed at each hop. >> > >> > As per previous threads in this list, the concept of subnet which = is >> > of no practical usefulness in this space. Since VMs can be randomly >> distributed across the network the subnet does not provide any >> > information aggregation value. Thus there is no need to do address >> > resolution. >> > >> > =A0 Pedro. >> > >> > On Wed, Nov 9, 2011 at 11:31 AM, Linda Dunbar >> > >> > wrote: >> > > For those of you who touch upon Data Center networking or server >> > > virtualization, be it Overlay, VPN4DC, or Application/Software >> > > driven Controller for Data Center, Address Resolution is = something >> > > Data >> > Center >> > > Gateways =A0will encounter because hosts/applications in data >> > > centers >> > do >> > > communicate with peers which are not in the same Overlay, outside >> > > the >> > VPN >> > > domain, or from general public. ARMD has published its WG problem >> > statement >> > > draft. Your comments and suggestions are appreciated (send to >> > > armd@ietf.org). >> > > >> > > >> > > >> > > Thanks, Linda Dunbar >> > > >> > > >> > > >> > > = ------------------------------------------------------------------ >> > > --- >> > -------------- >> > > >> > > >> > > >> > > >> > > >> > > A New Internet-Draft is available from the on-line = Internet-Drafts >> > > directories. This draft is a work item of the Address Resolution >> > > for >> > Massive >> > > numbers of hosts in the Data center Working Group of the IETF. >> > > >> > > >> > > >> > > =A0 =A0 =A0 =A0 Title =A0 =A0 =A0 =A0 =A0 : Problem Statement for = ARMD >> > > >> > > =A0 =A0 =A0 =A0 Author(s) =A0 =A0 =A0 : Thomas Narten >> > > >> > > =A0 =A0 =A0 =A0 Filename =A0 =A0 =A0 =A0: = draft-ietf-armd-problem-statement-00.txt >> > > >> > > =A0 =A0 =A0 =A0 Pages =A0 =A0 =A0 =A0 =A0 : 11 >> > > >> > > =A0 =A0 =A0 =A0 Date =A0 =A0 =A0 =A0 =A0 =A0: 2011-10-17 >> > > >> > > >> > > >> > > =A0 =A0This document examines issues related to the massive = scaling of >> > data >> > > >> > > =A0 =A0centers. =A0Our initial scope is relatively narrow. >> > > Specifically, >> > we >> > > >> > > =A0 =A0focus on address resolution (ARP and ND) within the data = center. >> > > >> > > >> > > >> > > >> > > >> > > A URL for this Internet-Draft is: >> > > >> > > http://www.ietf.org/internet-drafts/draft-ietf-armd-problem- >> > statement-00.txt >> > > >> > > >> > > >> > > Internet-Drafts are also available by anonymous FTP at: >> > > >> > > ftp://ftp.ietf.org/internet-drafts/ >> > > >> > > >> > > >> > > This Internet-Draft can be retrieved at: >> > > >> > > = ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-stateme >> > > nt- >> > 00.txt >> > > >> > > >> > > From xuxiaohu@huawei.com Tue Nov 15 17:30:49 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 165031F0C93; Tue, 15 Nov 2011 17:30:49 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 1.079 X-Spam-Level: * X-Spam-Status: No, score=1.079 tagged_above=-999 required=5 tests=[AWL=-2.925, BAYES_00=-2.599, J_CHICKENPOX_13=0.6, J_CHICKENPOX_22=0.6, J_CHICKENPOX_32=0.6, MANGLED_MEDS=2.3, MANGLED_PRBLMS=2.3, MIME_BASE64_TEXT=1.753, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QBj89QQ-GvW5; Tue, 15 Nov 2011 17:30:43 -0800 (PST) Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [119.145.14.67]) by ietfa.amsl.com (Postfix) with ESMTP id 8974B1F0C95; Tue, 15 Nov 2011 17:30:42 -0800 (PST) Received: from huawei.com (szxga04-in [172.24.2.12]) by szxga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUQ00EUHC74J8@szxga04-in.huawei.com>; Wed, 16 Nov 2011 09:30:40 +0800 (CST) Received: from szxrg01-dlp.huawei.com ([172.24.2.119]) by szxga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUQ00DERC6TVQ@szxga04-in.huawei.com>; Wed, 16 Nov 2011 09:30:40 +0800 (CST) Received: from szxeml208-edg.china.huawei.com ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.1.9-GA) with ESMTP id AFB62265; Wed, 16 Nov 2011 09:30:30 +0800 Received: from SZXEML409-HUB.china.huawei.com (10.82.67.136) by szxeml208-edg.china.huawei.com (172.24.2.60) with Microsoft SMTP Server (TLS) id 14.1.323.3; Wed, 16 Nov 2011 09:30:25 +0800 Received: from SZXEML525-MBS.china.huawei.com ([169.254.8.177]) by szxeml409-hub.china.huawei.com ([10.82.67.136]) with mapi id 14.01.0323.003; Wed, 16 Nov 2011 09:30:23 +0800 Date: Wed, 16 Nov 2011 01:30:22 +0000 From: Xuxiaohu In-reply-to: <201111151919.pAFJJJh74426@magenta.juniper.net> X-Originating-IP: [172.24.2.41] To: Yakov Rekhter , Linda Dunbar Message-id: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BDCA@szxeml525-mbs.china.huawei.com> MIME-version: 1.0 Content-type: text/plain; charset=gb2312 Content-language: zh-CN Content-transfer-encoding: base64 Accept-Language: zh-CN, en-US Thread-topic: Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-index: AQHMo8vtYH3v59PbJ0yNrS5G7pYICZWutQxx X-MS-Has-Attach: X-MS-TNEF-Correlator: X-CFilter-Loop: Reflected References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <201111151919.pAFJJJh74426@magenta.juniper.net> Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." 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szxrg01-dlp.huawei.com ([172.24.2.119]) by szxga03-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUQ0061LDNZWM@szxga03-in.huawei.com>; Wed, 16 Nov 2011 10:02:51 +0800 (CST) Received: from szxeml207-edg.china.huawei.com ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.1.9-GA) with ESMTP id AFB64641; Wed, 16 Nov 2011 10:02:51 +0800 Received: from SZXEML407-HUB.china.huawei.com (10.82.67.94) by szxeml207-edg.china.huawei.com (172.24.2.59) with Microsoft SMTP Server (TLS) id 14.1.323.3; Wed, 16 Nov 2011 10:02:47 +0800 Received: from SZXEML525-MBS.china.huawei.com ([169.254.8.177]) by szxeml407-hub.china.huawei.com ([10.82.67.94]) with mapi id 14.01.0323.003; Wed, 16 Nov 2011 10:02:45 +0800 Date: Wed, 16 Nov 2011 02:02:45 +0000 From: Xuxiaohu In-reply-to: X-Originating-IP: [172.24.2.41] To: Pedro Marques , Susan Hares Message-id: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BDE5@szxeml525-mbs.china.huawei.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-language: zh-CN Content-transfer-encoding: 7BIT Accept-Language: zh-CN, en-US Thread-topic: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-index: AQHMo76d77GNeTc5a0yss6siAfODR5Wuu7sI X-MS-Has-Attach: X-MS-TNEF-Correlator: X-CFilter-Loop: Reflected References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> <201111142042.pAEKg1h21336@magenta.juniper.net> <011101cca35e$a93be5b0$fbb3b110$@com> Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 02:03:41 -0000 The concept of an L2/L3 boundary is not useful if you assume that a VM can be placed in an arbitrary location. Anywhere you choose to put that "boundary": top-of-rack, aggregation, etc, you are likely to find that the boundary gets in the way of the VMs being able to be located anywhere. At least without causing traffic to cross the core twice which is a non-starter. Agree. So to actually solve the problem according to requirements one needs to get rid of the boundary and move to a solution that is all L2 or all L3. And ARP/ND is really not a relevant problem. With an "L2" solution tends to come the assumption that there is a single "isolation" domain... and a single subnet, which doesn't really cut it. "L3" and specially BGP-based IP/VPNs natively support the concept of direct traffic exchanges between different isolation domains, subject to policy. Even if you do decide to select an L2 approach that limits an application to a single isolation domain, the L2 mac information will need to be present at every switch where that L2 VLAN is present. If you follow an approach where there is core-interface to core-interface mac-learning (VXLAN for instance) then indeed you do have ARP broadcasts being used to update forwarding tables. But approaches such as EVPN can perform learning on the edge interface only eliminating the need to generate ARP broadcasts. It is entirely likely that the approaches that attempt to provide for large broadcast domains already contain a solution for L2 address discovery. Conversely it is rather unclear that you can address the ARP/ND scaling issue independently of the design of the L2 solution itself. Reasonable. However, the ARP cache mechanism is suitble for most MAC-forwarding based DCN solutions (e.g., VPLS) and much helpful for ARP broadcast reduction unless the L2VPN PE function is pushed to the physical server. Best regards, Xiaohu regards, Pedro. On Mon, Nov 14, 2011 at 10:20 PM, Susan Hares wrote: > Yakov: > > We are not trying to justify any definition we have, but to report what DC > operators have given as the problem in an OPS draft. > > In many ways, the text has been successful by having you comment on this > point so that operators can consider in depth this scenario. > > With all due respect to you as a grand master of word-smithing, let me > restate some of the argument so that I can attempt to inspire discussion. > > The "all" in this discussion indicates "all" within this domain which > crosses the VLANs in the text. The 802.1q VLAN mechanism provides some > scoping of broadcast and unicast for an L2 grouping. The IP Subset provides > a scoping for scoping for IP (L3 grouping). ARP maps the L2 grouping to the > l3 grouping. The growth in the number of nodes (VM or access) in the > combined groupings of mapped nodes are the problem. > > If you want to restrict nodes within this at L2 or L3, you must find a means > to determine the L2 grouping. The mapping of the IP to MAC Address is scoped > by the combination of L2/L3 grouping. > > So.. at some point the VM or the real nodes reach an "aggregation grouping" > at the access switch or the VMs forming an access switch. This grouping > point is stressed by the underlying growth of L2/L3 node combination. On the > ARMD BOF/List, Manish Karir (Merit) published a study in looking at the ARP > problem using VMs groupings. > > Some large scale operators stated the VM aggregation I described above did > not represent a case widely used. Therefore the discussion focused on the > deployed access switches, servers, and VMs as described in the text. Please > refer to past discussion from Igor G. on this list or his drafts on > solutions/problems. Also, you can refer to NANOG session on this. > > Yakov - let me know of I am unclear or just misunderstood your discussion > point. Linda, Manish, and Igor let me know if I was incorrect in anything I > said. > > Hopefully, I've given the discussion a push. If nothing else, it will > > Sue > > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of > Yakov Rekhter > Sent: Monday, November 14, 2011 3:42 PM > To: Linda Dunbar > Cc: l2vpn@ietf.org; sdnp@lucidvision.com; L3VPN WG mailing list; > armd@ietf.org; yakov@juniper.net; Pedro Marques > Subject: Re: [armd] Need your action to review > draft-ietf-armd-problem-statement-00.txt > > Linda, > >> Pedro, >> >> You are absolutely right that there is no ARP/ND scaling issue if IP >> can be extended to hosts. Even if IP can be extended to Access >> switches, there is not much ARP/ND issues. >> >> The draft lists down several common data center network designs, and >> states that some of the designs don't have ARP/ND scaling issues (but >> may have other issues for data centers). >> >> That is why I encourage people to read the draft and provides >> comments. > > From 4.2 of the draft: > > 4.2. Scenario 2: L3 Terminates at the Aggregation Switch > > In Scenario 2, the L3 network extends only to the aggregation > switches (or perhaps to routers that connect to the aggregation > switches). The aggregation switches (or the routers that connect to > multiple aggregation switches) could terminate multiple distinct IP > subnets (e.g., one per VLAN) or one large IP subnet. In order to let > hosts belonging to different IP subnets be placed under any access > switches, it is necessary for access switches to enable multiple > VLANs and aggregation switches to enable some VLANs (or subnets) over > many physical ports. This configuration breaks the confinement of > the VLAN's broadcast domain and makes it equivalent to all the access > switches being part of the same L2 broadcast domain (and IP subnet). > Thus, this configuration allows VMs to be moved to servers connected > to other access switches, but increases the size of the L2 broadcast > domain, which can lead to difficulties outlined below. > > This is the scenario that is used to justify the need for large L2 domain. > > The draft assumes that in order to move a given VM from one server to > another, where these two servers are connected to different access switches, > *all* the access switches must be configured with the VM's IP subnet, and > thus *all* the access switches must be part of the VM's L2 broadcast domain. > This is even if at any particular point in time the servers hosting all the > VMs of that IP subnet are connected to only a subset of these switches. But > is it truly necessary, or could the L2 broadcast domain span only the > switches connected to the servers that presently host VMs of the IP subnet ? > > Moreover, even if all the access switches need to be part of the same L2 > broadcast domain, the increase in the size of the L2 broadcast domain in the > above scenario is caused by the access switches, not by the number of VMs > per L2 domain. The difficulies mentioned in the last sentence of the quoted > paragraph are due to ARP, but ARP is generated by VMs, not by the access > switches. Given that, how the increase in the size of the L2 broadcast > domain *due solely to the access switches*, could increase the amount of ARP > traffic that routers have to process ? > > Yakov. > >> >> > -----Original Message----- >> > From: Pedro Marques [mailto:pedro.r.marques@gmail.com] >> > Sent: Wednesday, November 09, 2011 1:52 PM >> > To: Linda Dunbar >> > Cc: l2vpn@ietf.org; L3VPN WG mailing list; sdnp@lucidvision.com; >> > armd@ietf.org >> > Subject: Re: Need your action to review draft-ietf-armd-problem- >> > statement-00.txt >> > >> > Linda, >> > I'd like to point out that the problem does not need to be solved if >> > only IP connectivity is required. This I-D: >> > http://tools.ietf.org/html/draft-marques-l3vpn-end-system-02 >> > describes a solution in which address resolution is not required >> > irrespective of the location of the traffic destination. Simply put, >> > traffic can be routed at each hop. >> > >> > As per previous threads in this list, the concept of subnet which is >> > of no practical usefulness in this space. Since VMs can be randomly >> distributed across the network the subnet does not provide any >> > information aggregation value. Thus there is no need to do address >> > resolution. >> > >> > Pedro. >> > >> > On Wed, Nov 9, 2011 at 11:31 AM, Linda Dunbar >> > >> > wrote: >> > > For those of you who touch upon Data Center networking or server >> > > virtualization, be it Overlay, VPN4DC, or Application/Software >> > > driven Controller for Data Center, Address Resolution is something >> > > Data >> > Center >> > > Gateways will encounter because hosts/applications in data >> > > centers >> > do >> > > communicate with peers which are not in the same Overlay, outside >> > > the >> > VPN >> > > domain, or from general public. ARMD has published its WG problem >> > statement >> > > draft. Your comments and suggestions are appreciated (send to >> > > armd@ietf.org). >> > > >> > > >> > > >> > > Thanks, Linda Dunbar >> > > >> > > >> > > >> > > ------------------------------------------------------------------ >> > > --- >> > -------------- >> > > >> > > >> > > >> > > >> > > >> > > A New Internet-Draft is available from the on-line Internet-Drafts >> > > directories. This draft is a work item of the Address Resolution >> > > for >> > Massive >> > > numbers of hosts in the Data center Working Group of the IETF. >> > > >> > > >> > > >> > > Title : Problem Statement for ARMD >> > > >> > > Author(s) : Thomas Narten >> > > >> > > Filename : draft-ietf-armd-problem-statement-00.txt >> > > >> > > Pages : 11 >> > > >> > > Date : 2011-10-17 >> > > >> > > >> > > >> > > This document examines issues related to the massive scaling of >> > data >> > > >> > > centers. Our initial scope is relatively narrow. >> > > Specifically, >> > we >> > > >> > > focus on address resolution (ARP and ND) within the data center. >> > > >> > > >> > > >> > > >> > > >> > > A URL for this Internet-Draft is: >> > > >> > > http://www.ietf.org/internet-drafts/draft-ietf-armd-problem- >> > statement-00.txt >> > > >> > > >> > > >> > > Internet-Drafts are also available by anonymous FTP at: >> > > >> > > ftp://ftp.ietf.org/internet-drafts/ >> > > >> > > >> > > >> > > This Internet-Draft can be retrieved at: >> > > >> > > ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-stateme >> > > nt- >> > 00.txt >> > > >> > > >> > > _______________________________________________ armd mailing list armd@ietf.org https://www.ietf.org/mailman/listinfo/armd From kireeti@juniper.net Tue Nov 15 18:04:40 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A63B211E8158 for ; Tue, 15 Nov 2011 18:04:40 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0 X-Spam-Level: X-Spam-Status: No, score=x tagged_above=-999 required=5 tests=[] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Y1-LC7bYLnOP for ; Tue, 15 Nov 2011 18:04:40 -0800 (PST) Received: from exprod7og115.obsmtp.com (exprod7og115.obsmtp.com [64.18.2.217]) by ietfa.amsl.com (Postfix) with ESMTP id 555A91F0C7D for ; Tue, 15 Nov 2011 18:04:39 -0800 (PST) Received: from P-EMHUB01-HQ.jnpr.net ([66.129.224.36]) (using TLSv1) by exprod7ob115.postini.com ([64.18.6.12]) with SMTP ID DSNKTsMaNpoVxh5D4VRmmaCGP7pCB9Z2EfC1@postini.com; Tue, 15 Nov 2011 18:04:39 PST Received: from EMBX01-HQ.jnpr.net ([fe80::c821:7c81:f21f:8bc7]) by P-EMHUB01-HQ.jnpr.net ([fe80::fc92:eb1:759:2c72%11]) with mapi; Tue, 15 Nov 2011 18:00:14 -0800 From: Kireeti Kompella To: "armd@ietf.org" Date: Tue, 15 Nov 2011 18:00:13 -0800 Thread-Topic: 3 tier networks ... Thread-Index: AcykA3qVRqPrZRqDR7OWfFd9KtO04g== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/mixed; boundary="_002_D013F0FAAECF40EAA05283BC95A53951junipernet_" MIME-Version: 1.0 Subject: [armd] 3 tier networks ... X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 02:04:40 -0000 --_002_D013F0FAAECF40EAA05283BC95A53951junipernet_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable To follow up my comments yesterday, I think I understand somewhat better wh= y the 3 tier network "fits most scenarios" (as someone commented at the mik= e) even if those scenarios are not really 3 tier. In fact, the so-called 3= tier network omits the hosts, which add one (sans virtualization) or two (= vSwitch + VMs) more tiers that are of some slight interest to ARMD. The key appears to be that the 3 tier network captures the L2-L3 split that= is all so crucial to the ARMD discussion. Forgive me if this is obvious t= o all, or has been done to death already on this list. The "PE-P" split do= esn't quite capture this. The L2-L3 split is better captured by three tier= s: VM/host; L2 up to L2-L3 boundary; and L3. The L2 bit can be as big as t= he entire network, and as small as two entities (VM/host + access switch). = Correspondingly, the L3 bit can be as small as nothing, or as big as prett= y much the entire DC network. What that says to me is that the canonical picture ("Generalized 3 Layer Da= ta Center Network Architecture" or "typical topology"), from ARMD's pov per= haps should delineate this split, rather than the physical topology. The p= icture in my head (which I am reluctant to depict in an ASCII diagram; atta= ched is a PDF) is an L3 "core" bubble, surrounded by a number of L2 bubbles= , each divided into what Benson referred to as "resolution domains" (instan= tiated today most often as VLANs). This level of abstraction hopefully foc= uses on ARMD's central problem, and doesn't get hung up in details that don= 't matter as much. 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--_002_D013F0FAAECF40EAA05283BC95A53951junipernet_-- From yakov@juniper.net Tue Nov 15 11:22:24 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4BDCC21F89B8; Tue, 15 Nov 2011 11:22:24 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -103.519 X-Spam-Level: X-Spam-Status: No, score=-103.519 tagged_above=-999 required=5 tests=[AWL=-2.720, BAYES_00=-2.599, J_CHICKENPOX_22=0.6, J_CHICKENPOX_32=0.6, MANGLED_MEDS=2.3, MANGLED_PRBLMS=2.3, RCVD_IN_DNSWL_MED=-4, USER_IN_WHITELIST=-100] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DFNrZaLhHhUF; Tue, 15 Nov 2011 11:22:18 -0800 (PST) Received: from exprod7og105.obsmtp.com (exprod7og105.obsmtp.com [64.18.2.163]) by ietfa.amsl.com (Postfix) with ESMTP id 564A711E8081; Tue, 15 Nov 2011 11:21:47 -0800 (PST) Received: from P-EMHUB01-HQ.jnpr.net ([66.129.224.36]) (using TLSv1) by exprod7ob105.postini.com ([64.18.6.12]) with SMTP ID DSNKTsK7yiEIkQhW7dGbkp4id8lgufQR/wuZ@postini.com; Tue, 15 Nov 2011 11:22:18 PST Received: from magenta.juniper.net (172.17.27.123) by P-EMHUB01-HQ.jnpr.net (172.24.192.33) with Microsoft SMTP Server (TLS) id 8.3.213.0; Tue, 15 Nov 2011 11:19:22 -0800 Received: from juniper.net (sapphire.juniper.net [172.17.28.108]) by magenta.juniper.net (8.11.3/8.11.3) with ESMTP id pAFJJJh74426; Tue, 15 Nov 2011 11:19:22 -0800 (PST) (envelope-from yakov@juniper.net) Message-ID: <201111151919.pAFJJJh74426@magenta.juniper.net> To: Linda Dunbar In-Reply-To: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> X-MH-In-Reply-To: Linda Dunbar message dated "Wed, 09 Nov 2011 19:31:33 +0000." MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <93043.1321384759.1@juniper.net> Date: Tue, 15 Nov 2011 11:19:19 -0800 From: Yakov Rekhter X-Mailman-Approved-At: Tue, 15 Nov 2011 18:12:37 -0800 Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , armd@ietf.org Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Nov 2011 19:22:24 -0000 Linda, > For those of you who touch upon Data Center networking or server > virtualization, be it Overlay, VPN4DC, or Application/Software > driven Controller for Data Center, Address Resolution is something > Data Center Gateways will encounter because hosts/applications > in data centers do communicate with peers which are not in the same > Overlay, outside the VPN domain, or from general public. ARMD has > published its WG problem statement draft. Your comments and suggestions > are app reciated (send to armd@ietf.org). Should the overhead due to the broadcast unknown be considered as yet another "pain point" associated with large L2 domains ? Yakov. > > Thanks, Linda Dunbar > > ----------------------------------------------------------------------------- ------ > > > > A New Internet-Draft is available from the on-line Internet-Drafts directorie s. This draft is a work item of the Address Resolution for Massive numbers of h osts in the Data center Working Group of the IETF. > > > > Title : Problem Statement for ARMD > > Author(s) : Thomas Narten > > Filename : draft-ietf-armd-problem-statement-00.txt > > Pages : 11 > > Date : 2011-10-17 > > > > This document examines issues related to the massive scaling of data > > centers. Our initial scope is relatively narrow. Specifically, we > > focus on address resolution (ARP and ND) within the data center. > > > > > > A URL for this Internet-Draft is: > > http://www.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.txt > > > > Internet-Drafts are also available by anonymous FTP at: > > ftp://ftp.ietf.org/internet-drafts/ > > > > This Internet-Draft can be retrieved at: > > ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-statement-00.txt > > > --Boundary_(ID_2xYEQabSJUJeXxiogMJ0fQ) > Content-type: text/html; charset=us-ascii > Content-transfer-encoding: quoted-printable > > osoft-com:office:office" xmlns:w=3D"urn:schemas-microsoft-com:office:word" = > xmlns:x=3D"urn:schemas-microsoft-com:office:excel" xmlns:p=3D"urn:schemas-m= > icrosoft-com:office:powerpoint" xmlns:a=3D"urn:schemas-microsoft-com:office= > :access" xmlns:dt=3D"uuid:C2F41010-65B3-11d1-A29F-00AA00C14882" xmlns:s=3D"= > uuid:BDC6E3F0-6DA3-11d1-A2A3-00AA00C14882" xmlns:rs=3D"urn:schemas-microsof= > t-com:rowset" xmlns:z=3D"#RowsetSchema" xmlns:b=3D"urn:schemas-microsoft-co= > m:office:publisher" xmlns:ss=3D"urn:schemas-microsoft-com:office:spreadshee= > t" xmlns:c=3D"urn:schemas-microsoft-com:office:component:spreadsheet" xmlns= > :odc=3D"urn:schemas-microsoft-com:office:odc" xmlns:oa=3D"urn:schemas-micro= > soft-com:office:activation" xmlns:html=3D"http://www.w3.org/TR/REC-html40" = > xmlns:q=3D"http://schemas.xmlsoap.org/soap/envelope/" xmlns:rtc=3D"http://m= > icrosoft.com/officenet/conferencing" xmlns:D=3D"DAV:" xmlns:Repl=3D"http://= > schemas.microsoft.com/repl/" xmlns:mt=3D"http://schemas.microsoft.com/share= > point/soap/meetings/" xmlns:x2=3D"http://schemas.microsoft.com/office/excel= > /2003/xml" xmlns:ppda=3D"http://www.passport.com/NameSpace.xsd" xmlns:ois= > =3D"http://schemas.microsoft.com/sharepoint/soap/ois/" xmlns:dir=3D"http://= > schemas.microsoft.com/sharepoint/soap/directory/" xmlns:ds=3D"http://www.w3= > .org/2000/09/xmldsig#" xmlns:dsp=3D"http://schemas.microsoft.com/sharepoint= > /dsp" xmlns:udc=3D"http://schemas.microsoft.com/data/udc" xmlns:xsd=3D"http= > ://www.w3.org/2001/XMLSchema" xmlns:sub=3D"http://schemas.microsoft.com/sha= > repoint/soap/2002/1/alerts/" xmlns:ec=3D"http://www.w3.org/2001/04/xmlenc#"= > xmlns:sp=3D"http://schemas.microsoft.com/sharepoint/" xmlns:sps=3D"http://= > schemas.microsoft.com/sharepoint/soap/" xmlns:xsi=3D"http://www.w3.org/2001= > /XMLSchema-instance" xmlns:udcs=3D"http://schemas.microsoft.com/data/udc/so= > ap" xmlns:udcxf=3D"http://schemas.microsoft.com/data/udc/xmlfile" xmlns:udc= > p2p=3D"http://schemas.microsoft.com/data/udc/parttopart" xmlns:wf=3D"http:/= > /schemas.microsoft.com/sharepoint/soap/workflow/" xmlns:dsss=3D"http://sche= > mas.microsoft.com/office/2006/digsig-setup" xmlns:dssi=3D"http://schemas.mi= > crosoft.com/office/2006/digsig" xmlns:mdssi=3D"http://schemas.openxmlformat= > s.org/package/2006/digital-signature" xmlns:mver=3D"http://schemas.openxmlf= > ormats.org/markup-compatibility/2006" xmlns:m=3D"http://schemas.microsoft.c= > om/office/2004/12/omml" xmlns:mrels=3D"http://schemas.openxmlformats.org/pa= > ckage/2006/relationships" xmlns:spwp=3D"http://microsoft.com/sharepoint/web= > partpages" xmlns:ex12t=3D"http://schemas.microsoft.com/exchange/services/20= > 06/types" xmlns:ex12m=3D"http://schemas.microsoft.com/exchange/services/200= > 6/messages" xmlns:pptsl=3D"http://schemas.microsoft.com/sharepoint/soap/Sli= > deLibrary/" xmlns:spsl=3D"http://microsoft.com/webservices/SharePointPortal= > Server/PublishedLinksService" xmlns:Z=3D"urn:schemas-microsoft-com:" xmlns:= > st=3D"" xmlns=3D"http://www.w3.org/TR/REC-html40"> > > > > > > > >
>

For those of you who t= > ouch upon Data Center networking or server virtualization, be it Overlay, V= > PN4DC, or Application/Software driven Controller for Data Center, Address R= > esolution is something Data Center Gateways >  will encounter because hosts/applications in data centers do communi= > cate with peers which are not in the same Overlay, outside the VPN domain, = > or from general public. ARMD has published its WG problem statement draft. = > Your comments and suggestions are appreciated > (send to armd@ietf.org). <= > /span>

>

  n>

>

Thanks, Linda Dunbar :p>

>

  n>

>

----------------------= > ------------------------------------------------------------- pan>

>

  n>

>

 

> 
A New Internet-Draft is available from the on-line Internet-Drafts dir=
> ectories. This draft is a work item of the Address Resolution for Massive n=
> umbers of hosts in the Data center Working Group of the IETF. re>
> 
 

> 
        Title   &nbs=
> p;       : Problem Statement for ARMD :p>

> 
        Author(s)   =
>     : Thomas Narten

> 
        Filename   &=
> nbsp;    : draft-ietf-armd-problem-statement-00.txt p>

> 
        Pages   &nbs=
> p;       : 11

> 
        Date    =
> ;        : 2011-10-17

> 
 

> 
   This document examines issues related to the massive scal=
> ing of data

> 
   centers.  Our initial scope is relatively narrow.&nb=
> sp; Specifically, we

> 
   focus on address resolution (ARP and ND) within the data =
> center.

> 
 

> 
 

> 
A URL for this Internet-Draft is:

> 
 -statement-00.txt">http://www.ietf.org/internet-drafts/draft-ietf-armd-prob=
> lem-statement-00.txt

> 
 

> 
Internet-Drafts are also available by anonymous FTP at: e>
> 
ftp://ftp.ietf.org/int=
> ernet-drafts/

> 
 

> 
This Internet-Draft can be retrieved at:

> 
 statement-00.txt">ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-proble=
> m-statement-00.txt

> 
 

>
> > > > --Boundary_(ID_2xYEQabSJUJeXxiogMJ0fQ)-- > > --Boundary_(ID_pqxZHOFXGA69gJuhLyEG+A) > Content-id: <318D3282CFCD0C45A8C99283FF38289A@huawei.com> > Content-type: text/plain; name=ATT00001.txt > Content-transfer-encoding: 7BIT > Content-disposition: attachment; filename=ATT00001.txt; size=127; > creation-date="Fri, 04 Nov 2011 15:30:31 GMT"; > modification-date="Fri, 04 Nov 2011 15:30:31 GMT" > Content-description: ATT00001.txt > > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd > > --Boundary_(ID_pqxZHOFXGA69gJuhLyEG+A)-- From linda.dunbar@huawei.com Tue Nov 15 18:16:29 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4BDE511E810A; Tue, 15 Nov 2011 18:16:29 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.399 X-Spam-Level: X-Spam-Status: No, score=-6.399 tagged_above=-999 required=5 tests=[AWL=0.200, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nNB61oCxp4oC; Tue, 15 Nov 2011 18:16:28 -0800 (PST) Received: from usaga02-in.huawei.com (usaga02-in.huawei.com [206.16.17.70]) by ietfa.amsl.com (Postfix) with ESMTP id CF4B221F8DEF; Tue, 15 Nov 2011 18:16:28 -0800 (PST) Received: from huawei.com (localhost [127.0.0.1]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUQ0033CEBFGC@usaga02-in.huawei.com>; Tue, 15 Nov 2011 20:16:28 -0600 (CST) Received: from dfweml201-edg.china.huawei.com ([172.18.4.104]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTPS id <0LUQ006O9EBFJF@usaga02-in.huawei.com>; Tue, 15 Nov 2011 20:16:27 -0600 (CST) Received: from DFWEML403-HUB.china.huawei.com (10.193.5.151) by dfweml201-edg.china.huawei.com (172.18.9.107) with Microsoft SMTP Server (TLS) id 14.1.270.1; Tue, 15 Nov 2011 18:16:24 -0800 Received: from DFWEML506-MBX.china.huawei.com ([10.124.31.111]) by dfweml403-hub.china.huawei.com ([10.193.5.151]) with mapi id 14.01.0270.001; Tue, 15 Nov 2011 18:16:02 -0800 Date: Wed, 16 Nov 2011 02:16:02 +0000 From: Linda Dunbar In-reply-to: <201111151919.pAFJJJh74426@magenta.juniper.net> X-Originating-IP: [10.47.141.142] To: Yakov Rekhter Message-id: <4A95BA014132FF49AE685FAB4B9F17F6120C3809@dfweml506-mbx> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-language: en-US Content-transfer-encoding: 7BIT Accept-Language: en-US, zh-CN Thread-topic: Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-index: AQHMo8vVNnT5eJ8uDU6UO66dRJaZAJWvSePw X-MS-Has-Attach: X-MS-TNEF-Correlator: References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <201111151919.pAFJJJh74426@magenta.juniper.net> Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 02:16:29 -0000 Yakov, You are absolutely right. We will make sure it is properly captured in the document. Thanks, Linda > -----Original Message----- > > Should the overhead due to the broadcast unknown be considered as yet > another "pain point" associated with large L2 domains ? > > Yakov. > From xuxiaohu@huawei.com Tue Nov 15 19:24:11 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9C5EE11E809C; Tue, 15 Nov 2011 19:24:11 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.77 X-Spam-Level: X-Spam-Status: No, score=-1.77 tagged_above=-999 required=5 tests=[AWL=0.026, BAYES_00=-2.599, J_CHICKENPOX_13=0.6, MIME_BASE64_TEXT=1.753, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ob2Tcp76FL2j; Tue, 15 Nov 2011 19:24:11 -0800 (PST) Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [119.145.14.67]) by ietfa.amsl.com (Postfix) with ESMTP id 0305C11E8089; Tue, 15 Nov 2011 19:24:11 -0800 (PST) Received: from huawei.com (szxga04-in [172.24.2.12]) by szxga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUQ00EJYHDDJG@szxga04-in.huawei.com>; Wed, 16 Nov 2011 11:22:25 +0800 (CST) Received: from szxrg02-dlp.huawei.com ([172.24.2.119]) by szxga04-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUQ00BQEHDDXF@szxga04-in.huawei.com>; Wed, 16 Nov 2011 11:22:25 +0800 (CST) Received: from szxeml206-edg.china.huawei.com ([172.24.2.119]) by szxrg02-dlp.huawei.com (MOS 4.1.9-GA) with ESMTP id AFA16627; Wed, 16 Nov 2011 11:22:25 +0800 Received: from SZXEML405-HUB.china.huawei.com (10.82.67.60) by szxeml206-edg.china.huawei.com (172.24.2.58) with Microsoft SMTP Server (TLS) id 14.1.323.3; Wed, 16 Nov 2011 11:22:20 +0800 Received: from SZXEML525-MBS.china.huawei.com ([169.254.8.177]) by szxeml405-hub.china.huawei.com ([10.82.67.60]) with mapi id 14.01.0323.003; Wed, 16 Nov 2011 11:21:52 +0800 Date: Wed, 16 Nov 2011 03:22:13 +0000 From: Xuxiaohu In-reply-to: <4A95BA014132FF49AE685FAB4B9F17F6120C3809@dfweml506-mbx> X-Originating-IP: [172.24.2.41] To: Linda Dunbar , Yakov Rekhter Message-id: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BEA6@szxeml525-mbs.china.huawei.com> MIME-version: 1.0 Content-type: text/plain; charset=gb2312 Content-language: zh-CN Content-transfer-encoding: base64 Accept-Language: zh-CN, en-US Thread-topic: Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-index: AQHMpAfDSj1Fik0WlEub2ME5FLnYWJWu1HW5 X-MS-Has-Attach: X-MS-TNEF-Correlator: X-CFilter-Loop: Reflected References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <201111151919.pAFJJJh74426@magenta.juniper.net> <4A95BA014132FF49AE685FAB4B9F17F6120C3809@dfweml506-mbx> Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 03:24:11 -0000 DQpCeSB0aGUgd2F5LCBJIGFsc28gbm90aWNlZCB0aGF0IHRoZSBNQUMgZm9yd2FyZGluZyB0YWJs ZSBzY2FsYWJpbGl0eSBpc3N1ZSBpcyBtZW50aW9uZWQgaW4gdGhlIEFSTUQgcHJvYmxlbSBzdGF0 ZW1lbnQgZG9jLiBTaG91bGQgd2UgZXh0ZW5kIHRoZSBjaGFydGVyIHNjb3BlIG9mIEFSTUQgV0cg b3IgcmUtZm9ybSB0aGUgRENPUFMgV0cgdG8gZGlzY3VzcyBzbyBtYW55IGNoYWxsZW5nZXMgYW5k IHJlcXVpcmVtZW50cyBpbiBkYXRhIGNlbnRlcnM/DQoNCkJlc3QgcmVnYXJkcywNClhpYW9odQ0K X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXw0Kt6K8/sjLOiBsMnZwbi1i b3VuY2VzQGlldGYub3JnIFtsMnZwbi1ib3VuY2VzQGlldGYub3JnXSC0+rHtIExpbmRhIER1bmJh ciBbbGluZGEuZHVuYmFyQGh1YXdlaS5jb21dDQq3osvNyrG85DogMjAxMcTqMTHUwjE2yNUgMTA6 MTYNCrW9OiBZYWtvdiBSZWtodGVyDQpDYzogbDJ2cG5AaWV0Zi5vcmc7IHNkbnBAbHVjaWR2aXNp b24uY29tOyBMM1ZQTiBXRyBtYWlsaW5nIGxpc3Q7IGFybWRAaWV0Zi5vcmcNCtb3zOI6IFJFOiBO ZWVkIHlvdXIgYWN0aW9uIHRvIHJldmlldyAgICAgIGRyYWZ0LWlldGYtYXJtZC1wcm9ibGVtLXN0 YXRlbWVudC0wMC50eHQNCg0KWWFrb3YsDQoNCllvdSBhcmUgYWJzb2x1dGVseSByaWdodC4gV2Ug d2lsbCBtYWtlIHN1cmUgaXQgaXMgcHJvcGVybHkgY2FwdHVyZWQgaW4gdGhlIGRvY3VtZW50Lg0K DQpUaGFua3MsIExpbmRhDQoNCg0KPiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KPg0KPiBT aG91bGQgdGhlIG92ZXJoZWFkIGR1ZSB0byB0aGUgYnJvYWRjYXN0IHVua25vd24gYmUgY29uc2lk ZXJlZCBhcyB5ZXQNCj4gYW5vdGhlciAicGFpbiBwb2ludCIgYXNzb2NpYXRlZCB3aXRoIGxhcmdl IEwyIGRvbWFpbnMgPw0KPg0KPiBZYWtvdi4NCj4NCg== From linda.dunbar@huawei.com Tue Nov 15 19:27:47 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D865811E80CC; Tue, 15 Nov 2011 19:27:47 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.004 X-Spam-Level: X-Spam-Status: No, score=-4.004 tagged_above=-999 required=5 tests=[AWL=-2.208, BAYES_00=-2.599, J_CHICKENPOX_13=0.6, MIME_BASE64_TEXT=1.753, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6rENoKzWDZ2q; Tue, 15 Nov 2011 19:27:47 -0800 (PST) Received: from usaga02-in.huawei.com (usaga02-in.huawei.com [206.16.17.70]) by ietfa.amsl.com (Postfix) with ESMTP id 6338211E8081; Tue, 15 Nov 2011 19:27:47 -0800 (PST) Received: from huawei.com (localhost [127.0.0.1]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUQ003LZHMAGC@usaga02-in.huawei.com>; Tue, 15 Nov 2011 21:27:46 -0600 (CST) Received: from dfweml201-edg.china.huawei.com ([172.18.4.104]) by usaga02-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTPS id <0LUQ00EF0HM9OQ@usaga02-in.huawei.com>; Tue, 15 Nov 2011 21:27:45 -0600 (CST) Received: from DFWEML404-HUB.china.huawei.com (10.193.5.203) by dfweml201-edg.china.huawei.com (172.18.9.107) with Microsoft SMTP Server (TLS) id 14.1.270.1; Tue, 15 Nov 2011 19:27:42 -0800 Received: from DFWEML506-MBX.china.huawei.com ([10.124.31.111]) by dfweml404-hub.china.huawei.com ([10.193.5.203]) with mapi id 14.01.0270.001; Tue, 15 Nov 2011 19:27:01 -0800 Date: Wed, 16 Nov 2011 03:27:33 +0000 From: Linda Dunbar In-reply-to: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BEA6@szxeml525-mbs.china.huawei.com> X-Originating-IP: [10.47.141.142] To: Xuxiaohu , Yakov Rekhter Message-id: <4A95BA014132FF49AE685FAB4B9F17F6120C3940@dfweml506-mbx> MIME-version: 1.0 Content-type: text/plain; charset=gb2312 Content-language: en-US Content-transfer-encoding: base64 Accept-Language: en-US, zh-CN Thread-topic: Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-index: AQHMpA7joFQ3R5rJREugHGM3mM6D1ZWu1wLA X-MS-Has-Attach: X-MS-TNEF-Correlator: References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <201111151919.pAFJJJh74426@magenta.juniper.net> <4A95BA014132FF49AE685FAB4B9F17F6120C3809@dfweml506-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BEA6@szxeml525-mbs.china.huawei.com> Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 03:27:48 -0000 WGlhb0h1LCANCg0KTUFDIGZvcndhcmRpbmcgdGFibGUgc2l6ZSBpc3N1ZXMgYXJlIGFkZHJlc3Nl ZCBieSBJRUVFODAyLjEuIFRoZXJlIGFyZSBzZXZlcmFsIHByb3Bvc2FscyB0aGVyZSB0YXJnZXRp bmcgYXQgdGhlIGlzc3Vlcy4gDQoNCkxpbmRhDQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0t LS0NCj4gRnJvbTogWHV4aWFvaHUNCj4gU2VudDogV2VkbmVzZGF5LCBOb3ZlbWJlciAxNiwgMjAx MSAxMToyMiBBTQ0KPiBUbzogTGluZGEgRHVuYmFyOyBZYWtvdiBSZWtodGVyDQo+IENjOiBsMnZw bkBpZXRmLm9yZzsgc2RucEBsdWNpZHZpc2lvbi5jb207IEwzVlBOIFdHIG1haWxpbmcgbGlzdDsN Cj4gYXJtZEBpZXRmLm9yZw0KPiBTdWJqZWN0OiByZTogTmVlZCB5b3VyIGFjdGlvbiB0byByZXZp ZXcgZHJhZnQtaWV0Zi1hcm1kLXByb2JsZW0tDQo+IHN0YXRlbWVudC0wMC50eHQNCj4gDQo+IA0K PiBCeSB0aGUgd2F5LCBJIGFsc28gbm90aWNlZCB0aGF0IHRoZSBNQUMgZm9yd2FyZGluZyB0YWJs ZSBzY2FsYWJpbGl0eQ0KPiBpc3N1ZSBpcyBtZW50aW9uZWQgaW4gdGhlIEFSTUQgcHJvYmxlbSBz dGF0ZW1lbnQgZG9jLiBTaG91bGQgd2UgZXh0ZW5kDQo+IHRoZSBjaGFydGVyIHNjb3BlIG9mIEFS TUQgV0cgb3IgcmUtZm9ybSB0aGUgRENPUFMgV0cgdG8gZGlzY3VzcyBzbyBtYW55DQo+IGNoYWxs ZW5nZXMgYW5kIHJlcXVpcmVtZW50cyBpbiBkYXRhIGNlbnRlcnM/DQo+IA0KPiBCZXN0IHJlZ2Fy ZHMsDQo+IFhpYW9odQ0KPiBfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f DQo+ILeivP7IyzogbDJ2cG4tYm91bmNlc0BpZXRmLm9yZyBbbDJ2cG4tYm91bmNlc0BpZXRmLm9y Z10gtPqx7SBMaW5kYQ0KPiBEdW5iYXIgW2xpbmRhLmR1bmJhckBodWF3ZWkuY29tXQ0KPiC3osvN yrG85DogMjAxMcTqMTHUwjE2yNUgMTA6MTYNCj4gtb06IFlha292IFJla2h0ZXINCj4gQ2M6IGwy dnBuQGlldGYub3JnOyBzZG5wQGx1Y2lkdmlzaW9uLmNvbTsgTDNWUE4gV0cgbWFpbGluZyBsaXN0 Ow0KPiBhcm1kQGlldGYub3JnDQo+INb3zOI6IFJFOiBOZWVkIHlvdXIgYWN0aW9uIHRvIHJldmll dyAgICAgIGRyYWZ0LWlldGYtYXJtZC1wcm9ibGVtLQ0KPiBzdGF0ZW1lbnQtMDAudHh0DQo+IA0K PiBZYWtvdiwNCj4gDQo+IFlvdSBhcmUgYWJzb2x1dGVseSByaWdodC4gV2Ugd2lsbCBtYWtlIHN1 cmUgaXQgaXMgcHJvcGVybHkgY2FwdHVyZWQgaW4NCj4gdGhlIGRvY3VtZW50Lg0KPiANCj4gVGhh bmtzLCBMaW5kYQ0KPiANCj4gDQo+ID4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gPg0K PiA+IFNob3VsZCB0aGUgb3ZlcmhlYWQgZHVlIHRvIHRoZSBicm9hZGNhc3QgdW5rbm93biBiZSBj b25zaWRlcmVkIGFzIHlldA0KPiA+IGFub3RoZXIgInBhaW4gcG9pbnQiIGFzc29jaWF0ZWQgd2l0 aCBsYXJnZSBMMiBkb21haW5zID8NCj4gPg0KPiA+IFlha292Lg0KPiA+DQo= From kireeti@juniper.net Tue Nov 15 19:33:39 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 46C2B1F0C42 for ; Tue, 15 Nov 2011 19:33:39 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.599 X-Spam-Level: X-Spam-Status: No, score=-6.599 tagged_above=-999 required=5 tests=[BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uaDdPIqZESv3 for ; Tue, 15 Nov 2011 19:33:38 -0800 (PST) Received: from exprod7og119.obsmtp.com (exprod7og119.obsmtp.com [64.18.2.16]) by ietfa.amsl.com (Postfix) with ESMTP id 6CE841F0C35 for ; Tue, 15 Nov 2011 19:33:38 -0800 (PST) Received: from P-EMHUB01-HQ.jnpr.net ([66.129.224.36]) (using TLSv1) by exprod7ob119.postini.com ([64.18.6.12]) with SMTP ID DSNKTsMvEhVpWsBCP1KlE0NA5XcxwcS0Rk32@postini.com; Tue, 15 Nov 2011 19:33:38 PST Received: from EMBX01-HQ.jnpr.net ([fe80::c821:7c81:f21f:8bc7]) by P-EMHUB01-HQ.jnpr.net ([fe80::fc92:eb1:759:2c72%11]) with mapi; Tue, 15 Nov 2011 19:30:07 -0800 From: Kireeti Kompella To: "armd@ietf.org" Date: Tue, 15 Nov 2011 19:30:08 -0800 Thread-Topic: pain points ... Thread-Index: AcykEAnJFBH5skIeS/OCGRUDN/BIeg== Message-ID: <708FCEDA-B59C-4D93-A691-D5527B1AD900@juniper.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: [armd] pain points ... X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 03:33:39 -0000 The discussion of current pain points is important; however, we didn't just= arrive here (well, I did; but most of you have been doing this a while). = What that means is that the current pain points are (to some extent) the re= sult of "solving" earlier pain points. Stepping back might be useful. Freely re-interpreting Pedro, the tussle is between Layer 2 and Layer 3. H= ere's why running the entire DC as a single L2 domain is (perceived as bein= g) good: 1. L2 is "easy" -- plug-n-play, easy to configure, easy to understand, simp= le protocols. 2. L2 has a simple technique of network isolation (i.e., VLAN). 3. L2 isolation domains can be expanded and contracted very easily (add a V= LAN to a port; add a host to a VLAN). 4. VMotion (for those who care) only works in L2 (today). 5. (Legacy) apps are written to run on a LAN (i.e., they expect clients and= servers to live on the same subnet; they use LAN-wide services, e.g., DHCP= ). 6. Storage attaches easily at L2 (well, FC, FCoE, NAS, etc.) [this is NOT i= ntended to start a FCoE vs. iSCSI war!] Add to this the desire for "fungibility" of DC resources -- as Pedro put it= , the desire to place a VM anywhere, and subsequently move it anywhere else= ; same for storage, firewalls, LBs, etc. All this drives to _really_ large= L2 domains. And there begin new pain points =85 So, we need, at one level, to address the pain points of massive DCs today.= But at another level, we need to address the underlying pain points (real= and perceived). I realize fully that I'm stepping off the cliff of ARMD's= charter, but we (IETF) should do what's right, not just what's in this or = that WG's charter. And I agree with Pedro that a large part of that is mov= ing more fully to L3. Kireeti. From xuxiaohu@huawei.com Tue Nov 15 19:37:44 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 51CCB1F0C4B; Tue, 15 Nov 2011 19:37:44 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.771 X-Spam-Level: X-Spam-Status: No, score=-1.771 tagged_above=-999 required=5 tests=[AWL=0.025, BAYES_00=-2.599, J_CHICKENPOX_13=0.6, MIME_BASE64_TEXT=1.753, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 67kbrdVb19nv; Tue, 15 Nov 2011 19:37:43 -0800 (PST) Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [119.145.14.66]) by ietfa.amsl.com (Postfix) with ESMTP id 94A441F0C42; Tue, 15 Nov 2011 19:37:43 -0800 (PST) Received: from huawei.com (szxga03-in [172.24.2.9]) by szxga03-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUQ00DKRHZL47@szxga03-in.huawei.com>; Wed, 16 Nov 2011 11:35:45 +0800 (CST) Received: from szxrg01-dlp.huawei.com ([172.24.2.119]) by szxga03-in.huawei.com (iPlanet Messaging Server 5.2 HotFix 2.14 (built Aug 8 2006)) with ESMTP id <0LUQ00M83HZKX6@szxga03-in.huawei.com>; Wed, 16 Nov 2011 11:35:44 +0800 (CST) Received: from szxeml208-edg.china.huawei.com ([172.24.2.119]) by szxrg01-dlp.huawei.com (MOS 4.1.9-GA) with ESMTP id AFB72050; Wed, 16 Nov 2011 11:35:44 +0800 Received: from SZXEML410-HUB.china.huawei.com (10.82.67.137) by szxeml208-edg.china.huawei.com (172.24.2.60) with Microsoft SMTP Server (TLS) id 14.1.323.3; Wed, 16 Nov 2011 11:35:39 +0800 Received: from SZXEML525-MBS.china.huawei.com ([169.254.8.177]) by szxeml410-hub.china.huawei.com ([10.82.67.137]) with mapi id 14.01.0323.003; Wed, 16 Nov 2011 11:35:38 +0800 Date: Wed, 16 Nov 2011 03:35:37 +0000 From: Xuxiaohu In-reply-to: <4A95BA014132FF49AE685FAB4B9F17F6120C3940@dfweml506-mbx> X-Originating-IP: [172.24.2.41] To: Linda Dunbar , Yakov Rekhter Message-id: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BEE9@szxeml525-mbs.china.huawei.com> MIME-version: 1.0 Content-type: text/plain; charset=gb2312 Content-language: zh-CN Content-transfer-encoding: base64 Accept-Language: zh-CN, en-US Thread-topic: Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-index: AQHMpAfDSj1Fik0WlEub2ME5FLnYWJWu1HW5//98uoCAAIfTMw== X-MS-Has-Attach: X-MS-TNEF-Correlator: X-CFilter-Loop: Reflected References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <201111151919.pAFJJJh74426@magenta.juniper.net> <4A95BA014132FF49AE685FAB4B9F17F6120C3809@dfweml506-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BEA6@szxeml525-mbs.china.huawei.com> <4A95BA014132FF49AE685FAB4B9F17F6120C3940@dfweml506-mbx> Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." 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X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 04:29:58 -0000 Kireeti: Could you update your message to include newer protocols at layer 2 control plane SPBV and SPBM protocols and/or TRILL? These provide multipath at Layer 2, and large controllable Layer 2. Just a note, we have been strongly encouraged by Ron to not go outside our charter until we finish our work at this point. I will follow Ron's instructions. Sue -----Original Message----- From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of Kireeti Kompella Sent: Tuesday, November 15, 2011 10:30 PM To: armd@ietf.org Subject: [armd] pain points ... The discussion of current pain points is important; however, we didn't just arrive here (well, I did; but most of you have been doing this a while). What that means is that the current pain points are (to some extent) the result of "solving" earlier pain points. Stepping back might be useful. Freely re-interpreting Pedro, the tussle is between Layer 2 and Layer 3. Here's why running the entire DC as a single L2 domain is (perceived as being) good: 1. L2 is "easy" -- plug-n-play, easy to configure, easy to understand, simple protocols. 2. L2 has a simple technique of network isolation (i.e., VLAN). 3. L2 isolation domains can be expanded and contracted very easily (add a VLAN to a port; add a host to a VLAN). 4. VMotion (for those who care) only works in L2 (today). 5. (Legacy) apps are written to run on a LAN (i.e., they expect clients and servers to live on the same subnet; they use LAN-wide services, e.g., DHCP). 6. Storage attaches easily at L2 (well, FC, FCoE, NAS, etc.) [this is NOT intended to start a FCoE vs. iSCSI war!] Add to this the desire for "fungibility" of DC resources -- as Pedro put it, the desire to place a VM anywhere, and subsequently move it anywhere else; same for storage, firewalls, LBs, etc. All this drives to _really_ large L2 domains. And there begin new pain points . So, we need, at one level, to address the pain points of massive DCs today. But at another level, we need to address the underlying pain points (real and perceived). I realize fully that I'm stepping off the cliff of ARMD's charter, but we (IETF) should do what's right, not just what's in this or that WG's charter. And I agree with Pedro that a large part of that is moving more fully to L3. Kireeti. _______________________________________________ armd mailing list armd@ietf.org https://www.ietf.org/mailman/listinfo/armd From david.i.allan@ericsson.com Tue Nov 15 21:00:21 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 89C2C1F0CD1; Tue, 15 Nov 2011 21:00:21 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.957 X-Spam-Level: X-Spam-Status: No, score=-3.957 tagged_above=-999 required=5 tests=[AWL=-2.161, BAYES_00=-2.599, J_CHICKENPOX_13=0.6, MIME_BASE64_TEXT=1.753, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id z5w7AMpy1d5L; Tue, 15 Nov 2011 21:00:21 -0800 (PST) Received: from imr4.ericy.com (imr4.ericy.com [198.24.6.9]) by ietfa.amsl.com (Postfix) with ESMTP id 152C21F0CD0; Tue, 15 Nov 2011 21:00:20 -0800 (PST) Received: from eusaamw0707.eamcs.ericsson.se ([147.117.20.32]) by imr4.ericy.com (8.14.3/8.14.3/Debian-9.1ubuntu1) with ESMTP id pAG50D1j026365; Tue, 15 Nov 2011 23:00:15 -0600 Received: from EUSAACMS0703.eamcs.ericsson.se ([169.254.1.64]) by eusaamw0707.eamcs.ericsson.se ([147.117.20.32]) with mapi; Wed, 16 Nov 2011 00:00:10 -0500 From: David Allan I To: Xuxiaohu , Linda Dunbar , Yakov Rekhter Date: Wed, 16 Nov 2011 00:00:07 -0500 Thread-Topic: Need your action to review draft-ietf-armd-problem-statement-00.txt Thread-Index: AQHMpAfDSj1Fik0WlEub2ME5FLnYWJWu1HW5//98uoCAAIfTM4AAFySQ Message-ID: <60C093A41B5E45409A19D42CF7786DFD52272BF746@EUSAACMS0703.eamcs.ericsson.se> References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <201111151919.pAFJJJh74426@magenta.juniper.net> <4A95BA014132FF49AE685FAB4B9F17F6120C3809@dfweml506-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BEA6@szxeml525-mbs.china.huawei.com> <4A95BA014132FF49AE685FAB4B9F17F6120C3940@dfweml506-mbx> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BEE9@szxeml525-mbs.china.huawei.com> In-Reply-To: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE74BEE9@szxeml525-mbs.china.huawei.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Cc: "l2vpn@ietf.org" , "sdnp@lucidvision.com" , L3VPN WG mailing list , "armd@ietf.org" Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 05:00:21 -0000 SU1PIHRoZSBpc3N1ZSBpcyBhbHdheXMgaW4gdGhlIGV5ZXMgb2YgdGhlIGJlaG9sZGVyLiBJRiB3 ZSB3ZXJlIG9ubHkgYWJsZSB0byBldmVyIGRlcGxveSBPTkUgYm94IGluIHNjZW5hcmlvIDIgdGhl cmUgd291bGQgYmUgYW4gaXNzdWUuIEZvcnR1bmF0ZWx5IHdlIGRvIG5vdCBoYXZlIHN1Y2ggYW4g aXJyYXRpb25hbCBsaW1pdGF0aW9uLiBTbyB0aGVyZSBhcmUgb2J2aW91cyBhbmQgdHJpdmlhbCBz b2x1dGlvbnMgdG8gYWRkcmVzc2luZyBNQUMgc2NhbGFiaWxpdHkgb24gYSBzaW5nbGUgcGxhdGZv cm0sIGRlcGxveSBtb3JlIHRoYW4gb25lIGJveCENCg0KU28gaWYgd2Ugd2FudCB0byBmaW5kIHRo aW5ncyB0byB3b3JyeSBhYm91dCwgcGVyaGFwcyB3ZSBzaG91bGQgY2FzdCBvdXIgbmV0cyBlbHNl d2hlcmUuLi4NCg0KRGF2ZQ0KDQotLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KRnJvbTogbDJ2 cG4tYm91bmNlc0BpZXRmLm9yZyBbbWFpbHRvOmwydnBuLWJvdW5jZXNAaWV0Zi5vcmddIE9uIEJl aGFsZiBPZiBYdXhpYW9odQ0KU2VudDogV2VkbmVzZGF5LCBOb3ZlbWJlciAxNiwgMjAxMSAxMToz NiBBTQ0KVG86IExpbmRhIER1bmJhcjsgWWFrb3YgUmVraHRlcg0KQ2M6IGwydnBuQGlldGYub3Jn OyBzZG5wQGx1Y2lkdmlzaW9uLmNvbTsgTDNWUE4gV0cgbWFpbGluZyBsaXN0OyBhcm1kQGlldGYu b3JnDQpTdWJqZWN0OiByZTogTmVlZCB5b3VyIGFjdGlvbiB0byByZXZpZXcgZHJhZnQtaWV0Zi1h cm1kLXByb2JsZW0tc3RhdGVtZW50LTAwLnR4dA0KDQoNClNvLCBkaWQgeW91IG1lYW4gdGhlIGRl c2NyaXB0aW9uIHRleHQgZm9yIHRoZSBNQUMgdGFibGUgc2NhbGFiaWxpdHkgaXNzdWUgc2hvdWxk IGJlIHJlbW92ZWQgZnJvbSB0aGUgQVJNRCBwcm9ibGVtIHN0YXRlbWVudCBkb2M/DQoNCkJlc3Qg cmVnYXJkcywNClhpYW9odQ0KX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f Xw0Kt6K8/sjLOiBMaW5kYSBEdW5iYXINCreiy83KsbzkOiAyMDExxOoxMdTCMTbI1SAxMToyNw0K tb06IFh1eGlhb2h1OyBZYWtvdiBSZWtodGVyDQpDYzogbDJ2cG5AaWV0Zi5vcmc7IHNkbnBAbHVj aWR2aXNpb24uY29tOyBMM1ZQTiBXRyBtYWlsaW5nIGxpc3Q7IGFybWRAaWV0Zi5vcmcNCtb3zOI6 IFJFOiBOZWVkIHlvdXIgYWN0aW9uIHRvIHJldmlldyAgICAgIGRyYWZ0LWlldGYtYXJtZC1wcm9i bGVtLXN0YXRlbWVudC0wMC50eHQNCg0KWGlhb0h1LA0KDQpNQUMgZm9yd2FyZGluZyB0YWJsZSBz aXplIGlzc3VlcyBhcmUgYWRkcmVzc2VkIGJ5IElFRUU4MDIuMS4gVGhlcmUgYXJlIHNldmVyYWwg cHJvcG9zYWxzIHRoZXJlIHRhcmdldGluZyBhdCB0aGUgaXNzdWVzLg0KDQpMaW5kYQ0KDQo+IC0t LS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQo+IEZyb206IFh1eGlhb2h1DQo+IFNlbnQ6IFdlZG5l c2RheSwgTm92ZW1iZXIgMTYsIDIwMTEgMTE6MjIgQU0NCj4gVG86IExpbmRhIER1bmJhcjsgWWFr b3YgUmVraHRlcg0KPiBDYzogbDJ2cG5AaWV0Zi5vcmc7IHNkbnBAbHVjaWR2aXNpb24uY29tOyBM M1ZQTiBXRyBtYWlsaW5nIGxpc3Q7IA0KPiBhcm1kQGlldGYub3JnDQo+IFN1YmplY3Q6IHJlOiBO ZWVkIHlvdXIgYWN0aW9uIHRvIHJldmlldyBkcmFmdC1pZXRmLWFybWQtcHJvYmxlbS0gDQo+IHN0 YXRlbWVudC0wMC50eHQNCj4NCj4NCj4gQnkgdGhlIHdheSwgSSBhbHNvIG5vdGljZWQgdGhhdCB0 aGUgTUFDIGZvcndhcmRpbmcgdGFibGUgc2NhbGFiaWxpdHkgDQo+IGlzc3VlIGlzIG1lbnRpb25l ZCBpbiB0aGUgQVJNRCBwcm9ibGVtIHN0YXRlbWVudCBkb2MuIFNob3VsZCB3ZSBleHRlbmQgDQo+ IHRoZSBjaGFydGVyIHNjb3BlIG9mIEFSTUQgV0cgb3IgcmUtZm9ybSB0aGUgRENPUFMgV0cgdG8g ZGlzY3VzcyBzbyANCj4gbWFueSBjaGFsbGVuZ2VzIGFuZCByZXF1aXJlbWVudHMgaW4gZGF0YSBj ZW50ZXJzPw0KPg0KPiBCZXN0IHJlZ2FyZHMsDQo+IFhpYW9odQ0KPiBfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fDQo+ILeivP7IyzogbDJ2cG4tYm91bmNlc0BpZXRmLm9y ZyBbbDJ2cG4tYm91bmNlc0BpZXRmLm9yZ10gtPqx7SBMaW5kYSBEdW5iYXIgDQo+IFtsaW5kYS5k dW5iYXJAaHVhd2VpLmNvbV0NCj4gt6LLzcqxvOQ6IDIwMTHE6jEx1MIxNsjVIDEwOjE2DQo+ILW9 OiBZYWtvdiBSZWtodGVyDQo+IENjOiBsMnZwbkBpZXRmLm9yZzsgc2RucEBsdWNpZHZpc2lvbi5j b207IEwzVlBOIFdHIG1haWxpbmcgbGlzdDsgDQo+IGFybWRAaWV0Zi5vcmcNCj4g1vfM4jogUkU6 IE5lZWQgeW91ciBhY3Rpb24gdG8gcmV2aWV3ICAgICAgZHJhZnQtaWV0Zi1hcm1kLXByb2JsZW0t DQo+IHN0YXRlbWVudC0wMC50eHQNCj4NCj4gWWFrb3YsDQo+DQo+IFlvdSBhcmUgYWJzb2x1dGVs eSByaWdodC4gV2Ugd2lsbCBtYWtlIHN1cmUgaXQgaXMgcHJvcGVybHkgY2FwdHVyZWQgaW4gDQo+ IHRoZSBkb2N1bWVudC4NCj4NCj4gVGhhbmtzLCBMaW5kYQ0KPg0KPg0KPiA+IC0tLS0tT3JpZ2lu YWwgTWVzc2FnZS0tLS0tDQo+ID4NCj4gPiBTaG91bGQgdGhlIG92ZXJoZWFkIGR1ZSB0byB0aGUg YnJvYWRjYXN0IHVua25vd24gYmUgY29uc2lkZXJlZCBhcyANCj4gPiB5ZXQgYW5vdGhlciAicGFp biBwb2ludCIgYXNzb2NpYXRlZCB3aXRoIGxhcmdlIEwyIGRvbWFpbnMgPw0KPiA+DQo+ID4gWWFr b3YuDQo+ID4NCg== From rbonica@juniper.net Wed Nov 16 01:19:55 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A85FD21F8E62 for ; 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Wed, 16 Nov 2011 04:18:09 -0500 From: Ronald Bonica To: Susan Hares , Kireeti Kompella , "armd@ietf.org" Date: Wed, 16 Nov 2011 04:18:05 -0500 Thread-Topic: [armd] pain points ... Thread-Index: AcykEAnJFBH5skIeS/OCGRUDN/BIegAAynVwAAs2IUA= Message-ID: <13205C286662DE4387D9AF3AC30EF456D74938D2D3@EMBX01-WF.jnpr.net> References: <708FCEDA-B59C-4D93-A691-D5527B1AD900@juniper.net> <002e01cca418$5fc55500$1f4fff00$@com> In-Reply-To: <002e01cca418$5fc55500$1f4fff00$@com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: Re: [armd] pain points ... X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 09:19:55 -0000 Folks, As with any working group, I have instructed ARMD to stay within its charte= r. However, during this IETF, I have seen several WGs and BoFs trying to ident= ify the pain points within the data center. This work should probably be ce= ntralized in one place. Over the next few weeks, I will seek to determine w= here that work should be done. Ron > -----Original Message----- > From: Susan Hares [mailto:skh@ndzh.com] > Sent: Tuesday, November 15, 2011 11:30 PM > To: Kireeti Kompella; armd@ietf.org > Cc: Ronald Bonica > Subject: RE: [armd] pain points ... >=20 > Kireeti: >=20 > Could you update your message to include newer protocols at layer 2 > control > plane SPBV and SPBM protocols and/or TRILL? These provide multipath at > Layer 2, and large controllable Layer 2. >=20 > Just a note, we have been strongly encouraged by Ron to not go outside > our > charter until we finish our work at this point. I will follow Ron's > instructions. >=20 > Sue >=20 >=20 > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of > Kireeti Kompella > Sent: Tuesday, November 15, 2011 10:30 PM > To: armd@ietf.org > Subject: [armd] pain points ... >=20 > The discussion of current pain points is important; however, we didn't > just > arrive here (well, I did; but most of you have been doing this a > while). > What that means is that the current pain points are (to some extent) > the > result of "solving" earlier pain points. Stepping back might be > useful. >=20 > Freely re-interpreting Pedro, the tussle is between Layer 2 and Layer > 3. > Here's why running the entire DC as a single L2 domain is (perceived as > being) good: > 1. L2 is "easy" -- plug-n-play, easy to configure, easy to understand, > simple protocols. > 2. L2 has a simple technique of network isolation (i.e., VLAN). > 3. L2 isolation domains can be expanded and contracted very easily (add > a > VLAN to a port; add a host to a VLAN). > 4. VMotion (for those who care) only works in L2 (today). > 5. (Legacy) apps are written to run on a LAN (i.e., they expect clients > and > servers to live on the same subnet; they use LAN-wide services, e.g., > DHCP). > 6. Storage attaches easily at L2 (well, FC, FCoE, NAS, etc.) [this is > NOT > intended to start a FCoE vs. iSCSI war!] >=20 > Add to this the desire for "fungibility" of DC resources -- as Pedro > put it, > the desire to place a VM anywhere, and subsequently move it anywhere > else; > same for storage, firewalls, LBs, etc. All this drives to _really_ > large L2 > domains. And there begin new pain points . >=20 > So, we need, at one level, to address the pain points of massive DCs > today. > But at another level, we need to address the underlying pain points > (real > and perceived). I realize fully that I'm stepping off the cliff of > ARMD's > charter, but we (IETF) should do what's right, not just what's in this > or > that WG's charter. And I agree with Pedro that a large part of that is > moving more fully to L3. >=20 > Kireeti. >=20 > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd From skh@ndzh.com Wed Nov 16 15:05:58 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EDF3311E808B for ; Wed, 16 Nov 2011 15:05:58 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.837 X-Spam-Level: X-Spam-Status: No, score=0.837 tagged_above=-999 required=5 tests=[AWL=0.200, BAYES_00=-2.599, FH_HOST_EQ_D_D_D_D=0.765, FH_HOST_EQ_D_D_D_DB=0.888, HELO_MISMATCH_COM=0.553, HOST_MISMATCH_NET=0.311, RCVD_IN_SORBS_WEB=0.619, RDNS_DYNAMIC=0.1] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6980ua1Bu5A7 for ; Wed, 16 Nov 2011 15:05:54 -0800 (PST) Received: from hickoryhill-consulting.com (63-208-161-201.digitalrealm.net [63.208.161.201]) by ietfa.amsl.com (Postfix) with ESMTP id 21F1011E8085 for ; Wed, 16 Nov 2011 15:05:54 -0800 (PST) X-Default-Received-SPF: pass (skip=forwardok (res=PASS)) x-ip-name=61.220.70.183; Received: from SKHPERSONALLT (unverified [61.220.70.183]) by hickoryhill-consulting.com (SurgeMail 5.2a) with ESMTP id 2848183-1945496 for multiple; Wed, 16 Nov 2011 18:05:50 -0500 From: "Susan Hares" To: "'Ronald Bonica'" , "'Kireeti Kompella'" , References: <708FCEDA-B59C-4D93-A691-D5527B1AD900@juniper.net> <002e01cca418$5fc55500$1f4fff00$@com> <13205C286662DE4387D9AF3AC30EF456D74938D2D3@EMBX01-WF.jnpr.net> In-Reply-To: <13205C286662DE4387D9AF3AC30EF456D74938D2D3@EMBX01-WF.jnpr.net> Date: Wed, 16 Nov 2011 18:05:51 -0500 Message-ID: <005101cca4b4$4ae7de40$e0b79ac0$@com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: AcykEAnJFBH5skIeS/OCGRUDN/BIegAAynVwAAs2IUAAHQa6QA== Content-Language: en-us X-Authenticated-User: skh@ndzh.com Subject: Re: [armd] pain points ... X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Nov 2011 23:05:59 -0000 Ron: Being slow of understanding, does this mean you are "ok" with me discussing this issues on ARMD until you find another place? Sue -----Original Message----- From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of Ronald Bonica Sent: Wednesday, November 16, 2011 4:18 AM To: Susan Hares; Kireeti Kompella; armd@ietf.org Subject: Re: [armd] pain points ... Folks, As with any working group, I have instructed ARMD to stay within its charter. However, during this IETF, I have seen several WGs and BoFs trying to identify the pain points within the data center. This work should probably be centralized in one place. Over the next few weeks, I will seek to determine where that work should be done. Ron > -----Original Message----- > From: Susan Hares [mailto:skh@ndzh.com] > Sent: Tuesday, November 15, 2011 11:30 PM > To: Kireeti Kompella; armd@ietf.org > Cc: Ronald Bonica > Subject: RE: [armd] pain points ... > > Kireeti: > > Could you update your message to include newer protocols at layer 2 > control > plane SPBV and SPBM protocols and/or TRILL? These provide multipath at > Layer 2, and large controllable Layer 2. > > Just a note, we have been strongly encouraged by Ron to not go outside > our > charter until we finish our work at this point. I will follow Ron's > instructions. > > Sue > > > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of > Kireeti Kompella > Sent: Tuesday, November 15, 2011 10:30 PM > To: armd@ietf.org > Subject: [armd] pain points ... > > The discussion of current pain points is important; however, we didn't > just > arrive here (well, I did; but most of you have been doing this a > while). > What that means is that the current pain points are (to some extent) > the > result of "solving" earlier pain points. Stepping back might be > useful. > > Freely re-interpreting Pedro, the tussle is between Layer 2 and Layer > 3. > Here's why running the entire DC as a single L2 domain is (perceived as > being) good: > 1. L2 is "easy" -- plug-n-play, easy to configure, easy to understand, > simple protocols. > 2. L2 has a simple technique of network isolation (i.e., VLAN). > 3. L2 isolation domains can be expanded and contracted very easily (add > a > VLAN to a port; add a host to a VLAN). > 4. VMotion (for those who care) only works in L2 (today). > 5. (Legacy) apps are written to run on a LAN (i.e., they expect clients > and > servers to live on the same subnet; they use LAN-wide services, e.g., > DHCP). > 6. Storage attaches easily at L2 (well, FC, FCoE, NAS, etc.) [this is > NOT > intended to start a FCoE vs. iSCSI war!] > > Add to this the desire for "fungibility" of DC resources -- as Pedro > put it, > the desire to place a VM anywhere, and subsequently move it anywhere > else; > same for storage, firewalls, LBs, etc. All this drives to _really_ > large L2 > domains. And there begin new pain points . > > So, we need, at one level, to address the pain points of massive DCs > today. > But at another level, we need to address the underlying pain points > (real > and perceived). I realize fully that I'm stepping off the cliff of > ARMD's > charter, but we (IETF) should do what's right, not just what's in this > or > that WG's charter. And I agree with Pedro that a large part of that is > moving more fully to L3. > > Kireeti. > > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd _______________________________________________ armd mailing list armd@ietf.org https://www.ietf.org/mailman/listinfo/armd From rbonica@juniper.net Wed Nov 16 17:58:53 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D12011F0C64 for ; Wed, 16 Nov 2011 17:58:53 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -106.496 X-Spam-Level: X-Spam-Status: No, score=-106.496 tagged_above=-999 required=5 tests=[AWL=0.103, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4, USER_IN_WHITELIST=-100] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 3n5sE9PpOSmk for ; Wed, 16 Nov 2011 17:58:53 -0800 (PST) Received: from exprod7og119.obsmtp.com (exprod7og119.obsmtp.com [64.18.2.16]) by ietfa.amsl.com (Postfix) with ESMTP id C8CDC1F0C44 for ; Wed, 16 Nov 2011 17:58:51 -0800 (PST) Received: from P-EMHUB02-HQ.jnpr.net ([66.129.224.36]) (using TLSv1) by exprod7ob119.postini.com ([64.18.6.12]) with SMTP ID DSNKTsRqWiHaOPCGpcODbHru27Q/TsE0xL8f@postini.com; Wed, 16 Nov 2011 17:58:52 PST Received: from p-emfe02-wf.jnpr.net (172.28.145.25) by P-EMHUB02-HQ.jnpr.net (172.24.192.36) with Microsoft SMTP Server (TLS) id 8.3.213.0; Wed, 16 Nov 2011 17:51:44 -0800 Received: from EMBX01-WF.jnpr.net ([fe80::1914:3299:33d9:e43b]) by p-emfe02-wf.jnpr.net ([fe80::c126:c633:d2dc:8090%11]) with mapi; Wed, 16 Nov 2011 20:51:43 -0500 From: Ronald Bonica To: Susan Hares , Kireeti Kompella , "armd@ietf.org" Date: Wed, 16 Nov 2011 20:51:40 -0500 Thread-Topic: [armd] pain points ... Thread-Index: AcykEAnJFBH5skIeS/OCGRUDN/BIegAAynVwAAs2IUAAHQa6QAAFymRQ Message-ID: <13205C286662DE4387D9AF3AC30EF456D74943F84D@EMBX01-WF.jnpr.net> References: <708FCEDA-B59C-4D93-A691-D5527B1AD900@juniper.net> <002e01cca418$5fc55500$1f4fff00$@com> <13205C286662DE4387D9AF3AC30EF456D74938D2D3@EMBX01-WF.jnpr.net> <005101cca4b4$4ae7de40$e0b79ac0$@com> In-Reply-To: <005101cca4b4$4ae7de40$e0b79ac0$@com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: Re: [armd] pain points ... X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Nov 2011 01:58:53 -0000 Sue, For the time being, please proceed with the discussion. In the next week or= so, we will figure out where the discussion needs to be. Ron > -----Original Message----- > From: Susan Hares [mailto:skh@ndzh.com] > Sent: Wednesday, November 16, 2011 6:06 PM > To: Ronald Bonica; Kireeti Kompella; armd@ietf.org > Subject: RE: [armd] pain points ... >=20 > Ron: >=20 > Being slow of understanding, does this mean you are "ok" with me > discussing > this issues on ARMD until you find another place? >=20 > Sue >=20 > -----Original Message----- > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf Of > Ronald Bonica > Sent: Wednesday, November 16, 2011 4:18 AM > To: Susan Hares; Kireeti Kompella; armd@ietf.org > Subject: Re: [armd] pain points ... >=20 > Folks, >=20 > As with any working group, I have instructed ARMD to stay within its > charter. >=20 > However, during this IETF, I have seen several WGs and BoFs trying to > identify the pain points within the data center. This work should > probably > be centralized in one place. Over the next few weeks, I will seek to > determine where that work should be done. >=20 >=20 > Ron >=20 > > -----Original Message----- > > From: Susan Hares [mailto:skh@ndzh.com] > > Sent: Tuesday, November 15, 2011 11:30 PM > > To: Kireeti Kompella; armd@ietf.org > > Cc: Ronald Bonica > > Subject: RE: [armd] pain points ... > > > > Kireeti: > > > > Could you update your message to include newer protocols at layer 2 > > control > > plane SPBV and SPBM protocols and/or TRILL? These provide multipath > at > > Layer 2, and large controllable Layer 2. > > > > Just a note, we have been strongly encouraged by Ron to not go > outside > > our > > charter until we finish our work at this point. I will follow Ron's > > instructions. > > > > Sue > > > > > > -----Original Message----- > > From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf > Of > > Kireeti Kompella > > Sent: Tuesday, November 15, 2011 10:30 PM > > To: armd@ietf.org > > Subject: [armd] pain points ... > > > > The discussion of current pain points is important; however, we > didn't > > just > > arrive here (well, I did; but most of you have been doing this a > > while). > > What that means is that the current pain points are (to some extent) > > the > > result of "solving" earlier pain points. Stepping back might be > > useful. > > > > Freely re-interpreting Pedro, the tussle is between Layer 2 and Layer > > 3. > > Here's why running the entire DC as a single L2 domain is (perceived > as > > being) good: > > 1. L2 is "easy" -- plug-n-play, easy to configure, easy to > understand, > > simple protocols. > > 2. L2 has a simple technique of network isolation (i.e., VLAN). > > 3. L2 isolation domains can be expanded and contracted very easily > (add > > a > > VLAN to a port; add a host to a VLAN). > > 4. VMotion (for those who care) only works in L2 (today). > > 5. (Legacy) apps are written to run on a LAN (i.e., they expect > clients > > and > > servers to live on the same subnet; they use LAN-wide services, e.g., > > DHCP). > > 6. Storage attaches easily at L2 (well, FC, FCoE, NAS, etc.) [this is > > NOT > > intended to start a FCoE vs. iSCSI war!] > > > > Add to this the desire for "fungibility" of DC resources -- as Pedro > > put it, > > the desire to place a VM anywhere, and subsequently move it anywhere > > else; > > same for storage, firewalls, LBs, etc. All this drives to _really_ > > large L2 > > domains. And there begin new pain points . > > > > So, we need, at one level, to address the pain points of massive DCs > > today. > > But at another level, we need to address the underlying pain points > > (real > > and perceived). I realize fully that I'm stepping off the cliff of > > ARMD's > > charter, but we (IETF) should do what's right, not just what's in > this > > or > > that WG's charter. And I agree with Pedro that a large part of that > is > > moving more fully to L3. > > > > Kireeti. > > > > _______________________________________________ > > armd mailing list > > armd@ietf.org > > https://www.ietf.org/mailman/listinfo/armd >=20 > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd From warren@kumari.net Sat Nov 19 09:41:02 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C894021F86EC; Sat, 19 Nov 2011 09:41:02 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -105.077 X-Spam-Level: X-Spam-Status: No, score=-105.077 tagged_above=-999 required=5 tests=[AWL=-0.322, BAYES_00=-2.599, DATE_IN_PAST_03_06=0.044, J_CHICKENPOX_13=0.6, J_CHICKENPOX_32=0.6, J_CHICKENPOX_61=0.6, RCVD_IN_DNSWL_MED=-4, USER_IN_WHITELIST=-100] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0cUXTVQEVPJI; Sat, 19 Nov 2011 09:41:01 -0800 (PST) Received: from vimes.kumari.net (vimes.kumari.net [198.186.192.250]) by ietfa.amsl.com (Postfix) with ESMTP id 4B89221F86DD; Sat, 19 Nov 2011 09:41:00 -0800 (PST) Received: from [10.242.59.163] (mbc0f36d0.tmodns.net [208.54.15.188]) by vimes.kumari.net (Postfix) with ESMTPSA id 7F7C61B404C7; Sat, 19 Nov 2011 12:40:32 -0500 (EST) Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=windows-1252 From: Warren Kumari In-Reply-To: <00b601cca3c8$7c40ccf0$74c266d0$@com> Date: Sat, 19 Nov 2011 20:32:19 +0800 Content-Transfer-Encoding: quoted-printable Message-Id: <4D8C72F8-D64F-4707-9AA0-A3E9CA487127@kumari.net> References: <4A95BA014132FF49AE685FAB4B9F17F6120BEBC6@dfweml506-mbx> <4A95BA014132FF49AE685FAB4B9F17F6120BEC36@dfweml506-mbx> <201111142042.pAEKg1h21336@magenta.juniper.net> <011101cca35e$a93be5b0$fbb3b110$@com> <00b601cca3c8$7c40ccf0$74c266d0$@com> To: Susan Hares X-Mailer: Apple Mail (2.1084) Cc: l2vpn@ietf.org, sdnp@lucidvision.com, 'L3VPN WG mailing list' , armd@ietf.org, 'Pedro Marques' Subject: Re: [armd] Need your action to review draft-ietf-armd-problem-statement-00.txt X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 19 Nov 2011 17:41:02 -0000 On Nov 16, 2011, at 2:57 AM, Susan Hares wrote: > Pedro:=20 >=20 > In all politeness, let me acknowledge your message. I will respond = after I > see if Igor (Yahoo) or other DC/Carrier operators will comment on = their > viewpoints. Commenting (onna plane back from NRT->SFO so expect some decoherence.) >=20 > Best wishes,=20 >=20 > Sue=20 >=20 > -----Original Message----- > From: Pedro Marques [mailto:pedro.r.marques@gmail.com]=20 > Sent: Tuesday, November 15, 2011 12:47 PM > To: Susan Hares > Cc: Yakov Rekhter; Linda Dunbar; l2vpn@ietf.org; sdnp@lucidvision.com; = L3VPN > WG mailing list; armd@ietf.org > Subject: Re: [armd] Need your action to review > draft-ietf-armd-problem-statement-00.txt >=20 > Sue, >=20 > I think the following statements capture a common configuration for > small / low-bandwidth (1g) / private DCs: > - VLANs are used for isolation. > - These vlans are locally scoped to a pair of aggregation switches. > - They are statically configured at the access switches. > - Traffic exchange between vlans is done at the aggregation switches > (often subject to service modules). >=20 > The above is not contentious, i presume. Nope, not contentious (I personally would have worded bullets 2 and 3 as = one ("configured on the switching infrastructure") to better cover the = folk who collapse the aggregation / access into one device, etc... >=20 > I think that everyone would also agree that: > - It is highly desirable to be able to have an application (a > process running on a server) to be placed in an arbitrary location of > the DC. (which conflicts with vlan locality). > - It is expected that the number of application processes that > participate in the same isolation domain will grow significantly (due > to external factors related to application design). > - It is expected that the bandwidth requirements for severs will > increase by an order of magnitude (along with higher server > utilization). >=20 > I hope we all agree so far. Mostly=85. I question bullet 2 and the relevance to the argument, but not = important... >=20 > Now from the 2 sets of premises above it does not directly follow that > the answer is to build larger and larger L2 domains. Fully, 100% agree. > I do understand > that to be a common perception but that is actually not necessary and > imho not useful. >=20 > The fundamental misconception is that the application processes (in a > VM or other wise) do need VLANs. They do not. They need connectivity; > both within an inner level of isolation (today's vlan) and to other > services in the data center (which today is routed often subject to > security policies). An example of the later would be a set of database > servers; database servers are often expensive and shared among > different applications. >=20 > In order to be able to place any VM anywhere, the VM needs to have > direct connectivity to multiple isolation domains. isolation domains > which are today modeled as L2 and isolation domains that are today > modeled as L3. >=20 > The concept of an L2/L3 boundary is not useful if you assume that a VM > can be placed in an arbitrary location. Anywhere you choose to put > that "boundary": top-of-rack, aggregation, etc, you are likely to find > that the boundary gets in the way of the VMs being able to be located > anywhere. At least without causing traffic to cross the core twice > which is a non-starter. Not quite sure where the "crossing the core twice" pops up, but sure... >=20 > So to actually solve the problem according to requirements one needs > to get rid of the boundary and move to a solution that is all L2 or > all L3. Have to disagree here -- a hybrid approach with small L2 domains also = solves the issue. Not really pushing this, just a sayin'... > And ARP/ND is really not a relevant problem. In *this* design, with this set of problems and solutions, sure. If you have (e.g) already built your datacenter with 4 stinking huge L3 = (or L2) core switches and O(1000) ToR switches you may (do?) have ARP/ND = issues. Waving this away with the "Doctor, doctor" argument, while = tempting, doesn't actually solve the issue=85. >=20 > With an "L2" solution tends to come the assumption that there is a > single "isolation" domain... and a single subnet, which doesn't really > cut it. But, again, some folk have built to this design, and are familiar with = this design, and like this design, and have shown the ability to = actually operate this design at scale. It works for them and declaring = their design invalid because it doesn't match your (and, frankly my) = views of how to build things also doesn't cut it... > "L3" and specially BGP-based IP/VPNs natively support the > concept of direct traffic exchanges between different isolation > domains, subject to policy. As do many other overlay / tunneling solutions, and better design of end = applications (why exactly to customers purchasing VMs / machines in a = datacenter want all of their machines in the same "network"? Largely = because A: this is how they view the world and have the $$$ and B: some = of their apps want the things they talk to in the same subnet=85.) >=20 > Even if you do decide to select an L2 approach that limits an > application to a single isolation domain, the L2 mac information will > need to be present at every switch where that L2 VLAN is present. If > you follow an approach where there is core-interface to core-interface > mac-learning (VXLAN for instance) then indeed you do have ARP > broadcasts being used to update forwarding tables. But approaches such > as EVPN can perform learning on the edge interface only eliminating > the need to generate ARP broadcasts. >=20 > It is entirely likely that the approaches that attempt to provide for > large broadcast domains already contain a solution for L2 address > discovery. Conversely it is rather unclear that you can address the > ARP/ND scaling issue independently of the design of the L2 solution > itself. Hmmm. "unclear" is a squishy word -- I think that the ARP/ND scaling = issue *can* be addressed independently of the design of the L2 solution = -- for example, I can statically configure all ARP on all hosts in a = arbitrary large L2 domain... I guess in summary I largely agree with your mail, but feel that the ARP = scaling (and overlay ideas (and datacenter architecture)) questions are = worth addressing. While simply waving a magic wand and telling folk who have architectured = their datacenter as L2 that they are "doing it wrong" is fun (and Lord = knows I've done this and had some good fights^W debates with at least = one of the other active folk on this list) they may have valid reasons = for needing their design=85 W >=20 > regards, > Pedro. >=20 > On Mon, Nov 14, 2011 at 10:20 PM, Susan Hares wrote: >> Yakov: >>=20 >> We are not trying to justify any definition we have, but to report = what DC >> operators have given as the problem in an OPS draft. >>=20 >> In many ways, the text has been successful by having you comment on = this >> point so that operators can consider in depth this scenario. >>=20 >> With all due respect to you as a grand master of word-smithing, let = me >> restate some of the argument so that I can attempt to inspire = discussion. >>=20 >> The "all" in this discussion indicates "all" within this domain which >> crosses the VLANs in the text. The 802.1q VLAN mechanism provides = some >> scoping of broadcast and unicast for an L2 grouping. The IP Subset > provides >> a scoping for scoping for IP (L3 grouping). ARP maps the L2 grouping = to > the >> l3 grouping. The growth in the number of nodes (VM or access) in the >> combined groupings of mapped nodes are the problem. >>=20 >> If you want to restrict nodes within this at L2 or L3, you must find = a > means >> to determine the L2 grouping. The mapping of the IP to MAC Address is > scoped >> by the combination of L2/L3 grouping. >>=20 >> So.. at some point the VM or the real nodes reach an "aggregation > grouping" >> at the access switch or the VMs forming an access switch. This = grouping >> point is stressed by the underlying growth of L2/L3 node combination. = On > the >> ARMD BOF/List, Manish Karir (Merit) published a study in looking at = the > ARP >> problem using VMs groupings. >>=20 >> Some large scale operators stated the VM aggregation I described = above did >> not represent a case widely used. Therefore the discussion focused on = the >> deployed access switches, servers, and VMs as described in the text. > Please >> refer to past discussion from Igor G. on this list or his drafts on >> solutions/problems. Also, you can refer to NANOG session on this. >>=20 >> Yakov - let me know of I am unclear or just misunderstood your = discussion >> point. Linda, Manish, and Igor let me know if I was incorrect in = anything > I >> said. >>=20 >> Hopefully, I've given the discussion a push. If nothing else, it will >>=20 >> Sue >>=20 >> -----Original Message----- >> From: armd-bounces@ietf.org [mailto:armd-bounces@ietf.org] On Behalf = Of >> Yakov Rekhter >> Sent: Monday, November 14, 2011 3:42 PM >> To: Linda Dunbar >> Cc: l2vpn@ietf.org; sdnp@lucidvision.com; L3VPN WG mailing list; >> armd@ietf.org; yakov@juniper.net; Pedro Marques >> Subject: Re: [armd] Need your action to review >> draft-ietf-armd-problem-statement-00.txt >>=20 >> Linda, >>=20 >>> Pedro, >>>=20 >>> You are absolutely right that there is no ARP/ND scaling issue if IP >>> can be extended to hosts. Even if IP can be extended to Access >>> switches, there is not much ARP/ND issues. >>>=20 >>> The draft lists down several common data center network designs, and >>> states that some of the designs don't have ARP/ND scaling issues = (but >>> may have other issues for data centers). >>>=20 >>> That is why I encourage people to read the draft and provides >>> comments. >>=20 >> =46rom 4.2 of the draft: >>=20 >> 4.2. Scenario 2: L3 Terminates at the Aggregation Switch >>=20 >> In Scenario 2, the L3 network extends only to the aggregation >> switches (or perhaps to routers that connect to the aggregation >> switches). The aggregation switches (or the routers that connect = to >> multiple aggregation switches) could terminate multiple distinct IP >> subnets (e.g., one per VLAN) or one large IP subnet. In order to = let >> hosts belonging to different IP subnets be placed under any access >> switches, it is necessary for access switches to enable multiple >> VLANs and aggregation switches to enable some VLANs (or subnets) = over >> many physical ports. This configuration breaks the confinement of >> the VLAN's broadcast domain and makes it equivalent to all the = access >> switches being part of the same L2 broadcast domain (and IP = subnet). >> Thus, this configuration allows VMs to be moved to servers = connected >> to other access switches, but increases the size of the L2 = broadcast >> domain, which can lead to difficulties outlined below. >>=20 >> This is the scenario that is used to justify the need for large L2 = domain. >>=20 >> The draft assumes that in order to move a given VM from one server to >> another, where these two servers are connected to different access > switches, >> *all* the access switches must be configured with the VM's IP subnet, = and >> thus *all* the access switches must be part of the VM's L2 broadcast > domain. >> This is even if at any particular point in time the servers hosting = all > the >> VMs of that IP subnet are connected to only a subset of these = switches. > But >> is it truly necessary, or could the L2 broadcast domain span only the >> switches connected to the servers that presently host VMs of the IP = subnet > ? >>=20 >> Moreover, even if all the access switches need to be part of the same = L2 >> broadcast domain, the increase in the size of the L2 broadcast domain = in > the >> above scenario is caused by the access switches, not by the number of = VMs >> per L2 domain. The difficulies mentioned in the last sentence of the > quoted >> paragraph are due to ARP, but ARP is generated by VMs, not by the = access >> switches. Given that, how the increase in the size of the L2 = broadcast >> domain *due solely to the access switches*, could increase the amount = of > ARP >> traffic that routers have to process ? >>=20 >> Yakov. >>=20 >>>=20 >>>> -----Original Message----- >>>> From: Pedro Marques [mailto:pedro.r.marques@gmail.com] >>>> Sent: Wednesday, November 09, 2011 1:52 PM >>>> To: Linda Dunbar >>>> Cc: l2vpn@ietf.org; L3VPN WG mailing list; sdnp@lucidvision.com; >>>> armd@ietf.org >>>> Subject: Re: Need your action to review draft-ietf-armd-problem- >>>> statement-00.txt >>>>=20 >>>> Linda, >>>> I'd like to point out that the problem does not need to be solved = if >>>> only IP connectivity is required. This I-D: >>>> http://tools.ietf.org/html/draft-marques-l3vpn-end-system-02 >>>> describes a solution in which address resolution is not required >>>> irrespective of the location of the traffic destination. Simply = put, >>>> traffic can be routed at each hop. >>>>=20 >>>> As per previous threads in this list, the concept of subnet which = is >>>> of no practical usefulness in this space. Since VMs can be randomly >>> distributed across the network the subnet does not provide any >>>> information aggregation value. Thus there is no need to do address >>>> resolution. >>>>=20 >>>> Pedro. >>>>=20 >>>> On Wed, Nov 9, 2011 at 11:31 AM, Linda Dunbar >>>> >>>> wrote: >>>>> For those of you who touch upon Data Center networking or server >>>>> virtualization, be it Overlay, VPN4DC, or Application/Software >>>>> driven Controller for Data Center, Address Resolution is something >>>>> Data >>>> Center >>>>> Gateways will encounter because hosts/applications in data >>>>> centers >>>> do >>>>> communicate with peers which are not in the same Overlay, outside >>>>> the >>>> VPN >>>>> domain, or from general public. ARMD has published its WG problem >>>> statement >>>>> draft. Your comments and suggestions are appreciated (send to >>>>> armd@ietf.org). >>>>>=20 >>>>>=20 >>>>>=20 >>>>> Thanks, Linda Dunbar >>>>>=20 >>>>>=20 >>>>>=20 >>>>> ------------------------------------------------------------------ >>>>> --- >>>> -------------- >>>>>=20 >>>>>=20 >>>>>=20 >>>>>=20 >>>>>=20 >>>>> A New Internet-Draft is available from the on-line Internet-Drafts >>>>> directories. This draft is a work item of the Address Resolution >>>>> for >>>> Massive >>>>> numbers of hosts in the Data center Working Group of the IETF. >>>>>=20 >>>>>=20 >>>>>=20 >>>>> Title : Problem Statement for ARMD >>>>>=20 >>>>> Author(s) : Thomas Narten >>>>>=20 >>>>> Filename : draft-ietf-armd-problem-statement-00.txt >>>>>=20 >>>>> Pages : 11 >>>>>=20 >>>>> Date : 2011-10-17 >>>>>=20 >>>>>=20 >>>>>=20 >>>>> This document examines issues related to the massive scaling of >>>> data >>>>>=20 >>>>> centers. Our initial scope is relatively narrow. >>>>> Specifically, >>>> we >>>>>=20 >>>>> focus on address resolution (ARP and ND) within the data = center. >>>>>=20 >>>>>=20 >>>>>=20 >>>>>=20 >>>>>=20 >>>>> A URL for this Internet-Draft is: >>>>>=20 >>>>> http://www.ietf.org/internet-drafts/draft-ietf-armd-problem- >>>> statement-00.txt >>>>>=20 >>>>>=20 >>>>>=20 >>>>> Internet-Drafts are also available by anonymous FTP at: >>>>>=20 >>>>> ftp://ftp.ietf.org/internet-drafts/ >>>>>=20 >>>>>=20 >>>>>=20 >>>>> This Internet-Draft can be retrieved at: >>>>>=20 >>>>> ftp://ftp.ietf.org/internet-drafts/draft-ietf-armd-problem-stateme >>>>> nt- >>>> 00.txt >>>>>=20 >>>>>=20 >>>=20 >>=20 >>=20 >=20 > _______________________________________________ > armd mailing list > armd@ietf.org > https://www.ietf.org/mailman/listinfo/armd >=20 From cathryn@infc.ulst.ac.uk Fri Nov 25 02:49:08 2011 Return-Path: X-Original-To: armd@ietfa.amsl.com Delivered-To: armd@ietfa.amsl.com Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9E04821F8C13 for ; Fri, 25 Nov 2011 02:49:08 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.238 X-Spam-Level: X-Spam-Status: No, score=-6.238 tagged_above=-999 required=5 tests=[AWL=0.361, BAYES_00=-2.599, RCVD_IN_DNSWL_MED=-4] Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Y1KieC0AvAn2 for ; Fri, 25 Nov 2011 02:49:08 -0800 (PST) Received: from e4.ulster.ac.uk (e4.ulster.ac.uk [194.80.87.111]) by ietfa.amsl.com (Postfix) with ESMTP id 1845321F8C12 for ; Fri, 25 Nov 2011 02:49:07 -0800 (PST) Received: from m0.ulster.ac.uk (m0.ulster.ac.uk [194.80.87.153]) by e4.ulster.ac.uk (UU/BC) with ESMTP id pAPA96TX013019 for ; Fri, 25 Nov 2011 10:09:06 GMT Received: from martello.infc.ulst.ac.uk (martello.infc.ulst.ac.uk [193.61.166.223]) by m0.ulster.ac.uk (UU/BC) with ESMTP id pAPA96Xi023681 for ; Fri, 25 Nov 2011 10:09:06 GMT (envelope-from cathryn@infc.ulst.ac.uk) Received: from localhost (localhost.localdomain [127.0.0.1]) by martello.infc.ulst.ac.uk (Postfix) with ESMTP id 5EC783D06DA for ; Fri, 25 Nov 2011 10:09:06 +0000 (GMT) X-Virus-Scanned: amavisd-new at martello.infc.ulst.ac.uk Received: from martello.infc.ulst.ac.uk ([127.0.0.1]) by localhost (martello.infc.ulst.ac.uk [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id LXOZQj0xEjB0 for ; Fri, 25 Nov 2011 10:09:06 +0000 (GMT) Received: from martello.infc.ulst.ac.uk (martello.infc.ulst.ac.uk [193.61.166.223]) by martello.infc.ulst.ac.uk (Postfix) with ESMTP id 4A7323D05BC for ; Fri, 25 Nov 2011 10:09:06 +0000 (GMT) Date: Fri, 25 Nov 2011 10:09:06 +0000 (GMT) From: "Peoples, Cathryn" To: armd@ietf.org Message-ID: <887279624.1871322215746218.JavaMail.root@martello.infc.ulst.ac.uk> In-Reply-To: <1487366615.1521322215574216.JavaMail.root@martello.infc.ulst.ac.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [193.61.166.86] X-Mailer: Zimbra 5.0.18_GA_3011.RHEL5_64 (ZimbraWebClient - SAF3 (Win)/5.0.18_GA_3011.RHEL5_64) Subject: [armd] [CfP] IEEE/IFIP International Workshop on Management of the Future Internet (ManFI 2012) - April 16, 2012 - Hawaii, USA X-BeenThere: armd@ietf.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: "Discussion of issues associated with large amount of virtual machines being introduced in data centers and virtual hosts introduced by Cloud Computing." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 25 Nov 2011 10:49:08 -0000 ----------------------------------------------------------------------------------------------------- Please accept our apologies if you receive multiple copies of this CfP ----------------------------------------------------------------------------------------------------- IEEE/IFIP International Workshop on Management of the Future Internet (ManFI 2012) ================================================================================== 16 April 2012 Maui, Hawaii, USA http://www.manfi.org CALL FOR PAPERS --------------- The Fourth IEEE/IFIP International Workshop on Management of the Future Internet (ManFI 2012) will be held in conjunction with IEEE/IFIP NOMS 2012 in Maui, Hawaii, USA, from April 16-20, 2012. The workshop is sponsored by the IEEE Communications Society (ComSoc) and supported by POSTECH ITCE, Ghent University-IBBT, NEC, and Ericsson LM. The workshop is endorsed by the Technical Committee on Network Operations and Management (CNOM). It is widely agreed that, despite its many successes, the current Internet also has a set of systemic problems, ranging from an upcoming shortage of IP addresses to insufficient security. However, the lack of scalable and agile manageability is arguably more important, as without management, it is impossible to build systems that adapt the services and resources offered in a context-dependent manner. In either case (clean slate vs. evolution vs. revolution) we must consider the manageability of the Future Internet from the beginning. Following the success of the three previous editions of this workshop, held in conjunction with IM 2009, NOMS 2010 and IM 2011, ManFI 2012 aims at providing an international forum for researchers in these and similar areas. ManFI 2012 will combine original full paper presentations with a motivating keynote, quick hot topic presentations and a panel discussion to thoroughly explore this challenging topic. Topics of interest ------------------ Authors are invited to submit papers that fall into or are related to the topic areas listed below: - Architectural Issues * Advantages and disadvantages of revolutionary, evolutionary, and other approaches to managing the Future Internet * Separation of data, control, and management planes * Design of architectural building blocks for managing the Future Internet * Advances in measurement, management, security, accounting, mobility, and other functions * Virtualization of resources and services * Dynamic composition of management and operational functionality * Mechanisms for managing interconnected computational infrastructures (e.g. elastic clouds, federated clouds) in the Future Internet * Implications of social network success on the Future Internet architecture - Design and Implementation Issues * Abstractions for programmable network elements * Accommodating context-awareness in management * Applying situation awareness to network management * Federation between administrative domains and support of all constituencies * The role of models, ontologies, and other knowledge abstractions in the Future Internet * Uncertainty and probabilistic approaches to management of the Future Internet * Approaches for the organization of management data, data analytics and visualization * Experience reports from Future Internet experimental facilities set-up and results - Economic Issues * Economic aspects driving the deployment of Future Internet management technology * Economic opportunities and challenges for management technology * Experience reports from management in test beds Paper submission ---------------- Paper submissions must present original, research or experiences. Late-breaking advances and work-in-progress reports from ongoing research are also encouraged. Only original papers that have not been published or submitted for publication elsewhere can be submitted. Each submission must be written in English, accompanied by a 75 to 200 word abstract that clearly outlines the scope and contributions of the paper, and a list of up to 5 key words. There is a length limitation of 6 pages (including title, abstract, all figures, tables, and references) for regular conference papers, and 4 pages for short papers. Submissions must be in IEEE 2-column style. Papers exceeding these limits, multiple submissions, and self-plagiarized papers will be rejected without further review. Authors should submit their papers in PDF, postscript, or Word formats via JEMS: (https://submissoes.sbc.org.br/). Proceedings ----------- Papers accepted for ManFI 2012 will be included in the conference proceedings, IEEE Xplore, and EI Index. The IEEE reserves the right to remove any paper from IEEE Xplore if the paper is not presented at the workshop. Awards will be presented to the best paper and to the best student paper at the workshop. Furthermore, we plan to work with a leading journal, such as JNSM, TNSM and IJNM, to solicit extended versions of the best papers of ManFI 2012 to be submitted for review. Workshop Co-Chairs ------------------ - Prof. James Won-Ki Hong, POSTECH, Korea - Prof. Filip De Turck, Ghent University - IBBT, Belgium - Dr. Yoshiaki Kiriha, NEC, Japan - Dr. Sven van der Meer, Ericsson LM, Ireland Publicity Co-Chairs ------------------- - Leonidas Lymberopoulos, National Technical University of Athens, Greece - Cathryn Peoples, University of Ulster, UK Important dates --------------- - Abstract registration deadline: December 14, 2011 - Paper submission: December 20, 2011 - Notification of acceptance: January 31, 2012 - Final version of papers due: February 15, 2012 - Workshop date: April 16, 2012 For more information, please contact one of the Workshop Co-Chairs at tpcchairs@manfi2012.org