From nobody Sat Oct 3 19:53:31 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 99FC21B2EF7 for ; Sat, 3 Oct 2015 19:53:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 3.939 X-Spam-Level: *** X-Spam-Status: No, score=3.939 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, CHARSET_FARAWAY_HEADER=3.2, J_CHICKENPOX_26=0.6, MIME_8BIT_HEADER=0.3, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Z-SYp2rvvvUH for ; Sat, 3 Oct 2015 19:53:27 -0700 (PDT) Received: from smfilter2.kt.com (smfilter2.kt.com [14.63.245.209]) by ietfa.amsl.com (Postfix) with ESMTP id 7BE671B2EF6 for ; Sat, 3 Oct 2015 19:53:26 -0700 (PDT) Received: from external ([147.6.42.86]) by smfilter2.kt.com (1.0) id t942rMG00886; Sun, 04 Oct 2015 11:53:22 +0900 Received: by KTEX1.localdomain (Postfix, from userid 0) id 3nT8kp3z2pzPyF4; Sun, 4 Oct 2015 11:53:22 +0900 (KST) Received: from MAIL-FRT-02.corp.ktad.kt.com (unknown [147.6.42.85]) by KTEX1.localdomain (Postfix) with ESMTP id 3nT8kp3q6WzPyDr; Sun, 4 Oct 2015 11:53:22 +0900 (KST) Received: from MAIL-MBX-02.corp.ktad.kt.com ([10.215.33.72]) by MAIL-FRT-02.corp.ktad.kt.com ([10.215.33.52]) with mapi id 14.02.0318.004; Sun, 4 Oct 2015 11:53:22 +0900 From: =?ks_c_5601-1987?B?sK3FwsijKFNETiBQcm9qZWN0KQ==?= To: sfc issue tracker , "draft-ietf-sfc-control-plane@tools.ietf.org" , "mohamed.boucadair@orange.com" Thread-Topic: [sfc] #14 (control-plane): Taeho's Comments Thread-Index: AQHQ8I9T7TcVFn9cV0mTpQZNxo7kn55apC4g Date: Sun, 4 Oct 2015 02:53:21 +0000 Message-ID: References: <066.30544c61f7d483f2c92b00ddfacd598d@tools.ietf.org> In-Reply-To: <066.30544c61f7d483f2c92b00ddfacd598d@tools.ietf.org> Accept-Language: ko-KR, en-US Content-Language: ko-KR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-dispnameaddress: th.kang@kt.com x-originating-ip: [10.214.72.214] Content-Type: text/plain; charset="ks_c_5601-1987" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: "sfc@ietf.org" Subject: Re: [sfc] #14 (control-plane): Taeho's Comments X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 04 Oct 2015 02:53:29 -0000 SGksDQpTb3JyeSBmb3IgbGF0ZSByZWFjdGlvbi4NCg0KUmVzaWxpZW5jeSBhbmQgbG9hZCBiYWxh bmNpbmcgbWlnaHQgYWxzbyBpbmNsdWRlIGFkZGl0aW9uYWwgYXNwZWN0cyBsaWtlIGJlbG93Og0K SW4gc2VjdGlvbiAnNC4xMS4xLiBTZXJ2aWNlIEZ1bmN0aW9uIFBhdGggQWRqdXN0bWVudCcsDQpT RlAgZmFpbG92ZXIgYW5kIFNGL1NGQyBsb2FkIGJhbGFuY2luZyBhcmUgZGlzY3Vzc2VkLg0KDQpJ biBTRlAgZmFpbG92ZXIsDQpkdXJpbmcgdGhlIHByb2Nlc3Mgb2YgcmVwbGFjaW5nIGZhaWxlZCBT 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LS0tLS0tLSstLS0NCg0KVGlja2V0IFVSTDogPGh0dHA6Ly90cmFjLnRvb2xzLmlldGYub3JnL3dn L3NmYy90cmFjL3RpY2tldC8xND4NCnNmYyA8aHR0cDovL3Rvb2xzLmlldGYub3JnL3NmYy8+DQoN Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fDQpzZmMgbWFp bGluZyBsaXN0DQpzZmNAaWV0Zi5vcmcNCmh0dHBzOi8vd3d3LmlldGYub3JnL21haWxtYW4vbGlz dGluZm8vc2ZjDQoNCg0KwMwguN7Az8C6IMH2waS1yCC89sPrwM64uMC7IMCnx9ggwNu8urXHvvrA uLjnLCDB37/kx9EgwaS6uLOqIMD6wNuxx8C7IMb3x9THz7DtIMDWwLsgvPYgwNa9wLTPtNkuIL7u trDH0SCxx8fRIL74wMwsILq7ILmuvK2/oSDG98fUtcggwaS6uMDHIMD8us4gtse0wiDAz7rOuKYg uau03MC4t84gwaYzwNq/obDUILD4sLMsILnoxvcsILq5u+cgtse0wiC757/rx8+0wiCwzcC7IL72 sN3I9yCx3cH2x9W0z7TZLiC4uL7gLCC6uyC43sDPwMwgwN+4+CDA/LzbtcggsOa/7Cwgud+9xcDO ILbHtMIgtOe757+hIL7Lt8HB1r3DsO0sILq7ILjewM/AuyDB773DILvowabHz7+pIMHWvcOx4iC5 2bb4tM+02S4NClRoaXMgRS1tYWlsIG1heSBjb250YWluIGNvbmZpZGVudGlhbCBpbmZvcm1hdGlv biBhbmQvb3IgY29weXJpZ2h0IG1hdGVyaWFsLiBUaGlzIGVtYWlsIGlzIGludGVuZGVkIGZvciB0 aGUgdXNlIG9mIHRoZSBhZGRyZXNzZWUgb25seS4gSWYgeW91IHJlY2VpdmUgdGhpcyBlbWFpbCBi eSBtaXN0YWtlLCBwbGVhc2UgZWl0aGVyIGRlbGV0ZSBpdCB3aXRob3V0IHJlcHJvZHVjaW5nLCBk aXN0cmlidXRpbmcgb3IgcmV0YWluaW5nIGNvcGllcyB0aGVyZW9mIG9yIG5vdGlmeSB0aGUgc2Vu ZGVyIGltbWVkaWF0ZWx5Lg0K From nobody Mon Oct 5 05:51:18 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C36E71A8AE7 for ; Mon, 5 Oct 2015 05:51:16 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rLi60kGYNFgg for ; Mon, 5 Oct 2015 05:51:15 -0700 (PDT) Received: from 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alln-iport-3.cisco.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Oct 2015 12:51:14 +0000 Received: from XCH-RCD-009.cisco.com (xch-rcd-009.cisco.com [173.37.102.19]) by rcdn-core-12.cisco.com (8.14.5/8.14.5) with ESMTP id t95CpEoM011309 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL) for ; Mon, 5 Oct 2015 12:51:14 GMT Received: from xch-rcd-008.cisco.com (173.37.102.18) by XCH-RCD-009.cisco.com (173.37.102.19) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Mon, 5 Oct 2015 07:51:13 -0500 Received: from xch-rcd-008.cisco.com ([173.37.102.18]) by XCH-RCD-008.cisco.com ([173.37.102.18]) with mapi id 15.00.1104.000; Mon, 5 Oct 2015 07:51:13 -0500 From: "Jim Guichard (jguichar)" To: "sfc@ietf.org" Thread-Topic: SFC WG agenda slots - Yokohama Thread-Index: AQHQ/2yEgKKh7mjWjUSUWGp1Wq1how== Date: Mon, 5 Oct 2015 12:51:13 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.4.7.141117 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.98.43.180] Content-Type: multipart/alternative; boundary="_000_D237EA7E28369jguicharciscocom_" MIME-Version: 1.0 Archived-At: Subject: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Oct 2015 12:51:17 -0000 --_000_D237EA7E28369jguicharciscocom_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Greetings WG: Our meeting in Yokohama is fast approaching. As always the goal of the meet= ing will be to make the best use of our limited face-to-face time. With tha= t in mind we welcome requests for agenda time. As we build the meeting agenda our goal will be to select presentations tha= t best further the work of the WG, and that generally means focusing on key= charter deliverables and topics with important open issues to resolve. Whe= n making a request please consider what you think the WG should do with its= content - for example: * Does the document have useful content that should be moved into anoth= er WG document or progress on its own merit * Does the content have a good basis for one of the WG documents per th= e charter * Should the document content be merged with one or more other document= s, so that a combined document could become a WG document Jim & Thomas --_000_D237EA7E28369jguicharciscocom_ Content-Type: text/html; charset="iso-8859-1" Content-ID: <573D2B0ABE53824B8208B415F2492F55@emea.cisco.com> Content-Transfer-Encoding: quoted-printable
Greetings WG:

Our meeting in Yokohama is fast approaching. As always the goal of the= meeting will be to make the best use of our limited face-to-face time. Wit= h that in mind we welcome requests for agenda time. 

As we build the meeting agenda our goal will be to select presentation= s that best further the work of the WG, and that generally means focusing o= n key charter deliverables and topics with important open issues to resolve= . When making a request please consider what you think the WG should do with its content – for example:
  • Does the document have useful content that should be moved into another= WG document or progress on its own merit
  • Does the content have a g= ood basis for one of the WG documents per the charter
  • Should the do= cument content be merged with one or more other documents, so that a combin= ed document could become a WG document
Jim & Thomas
--_000_D237EA7E28369jguicharciscocom_-- From nobody Mon Oct 5 10:46:15 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4D8021B2A7E for ; Mon, 5 Oct 2015 10:46:14 -0700 (PDT) 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=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rckGXJZJSNho for ; Mon, 5 Oct 2015 10:46:12 -0700 (PDT) Received: from mail1.sandvine.com (Mail1.sandvine.com [64.7.137.134]) by ietfa.amsl.com (Postfix) with ESMTP id B49851B2A6B for ; Mon, 5 Oct 2015 10:46:12 -0700 (PDT) Received: from BLR-EXCHP-2.sandvine.com (192.168.196.172) by WTL-EXCHP-2.sandvine.com (192.168.194.177) with Microsoft SMTP Server (TLS) id 14.3.195.1; Mon, 5 Oct 2015 13:46:14 -0400 Received: from WTL-EXCHP-2.sandvine.com ([fe80::68ac:f071:19ff:3455]) by blr-exchp-2.sandvine.com ([fe80::6c6d:7108:c63c:9055%14]) with mapi id 14.03.0181.006; Mon, 5 Oct 2015 13:46:07 -0400 From: Dave Dolson To: "sfc@ietf.org" Thread-Topic: New Version Notification for draft-dolson-sfc-hierarchical-03.txt Thread-Index: AQHQ/lwpnFN/a7K7i0OhzegZz3fUy55dLkew Date: Mon, 5 Oct 2015 17:46:12 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.200.63] Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: [sfc] FW: New Version Notification for draft-dolson-sfc-hierarchical-03.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Oct 2015 17:46:14 -0000 V2UgaGF2ZSB1cGRhdGVkIHRoZSBIaWVyYXJjaGljYWwgU2VydmljZSBGdW5jdGlvbiBDaGFpbmlu ZyBkcmFmdC4NCg0KVGhlcmUgaXMgYSBuZXcgQXBwZW5kaXggQS4yLCAiTWFuYWdpbmcgYSBEaXN0 cmlidXRlZCBEYXRhLUNlbnRlciBOZXR3b3JrIg0KaHR0cHM6Ly90b29scy5pZXRmLm9yZy9odG1s L2RyYWZ0LWRvbHNvbi1zZmMtaGllcmFyY2hpY2FsLTAzI2FwcGVuZGl4LUEuMg0KDQphbmQgbnVt ZXJvdXMgZWRpdG9yaWFsIGltcHJvdmVtZW50cy4NCg0KLURhdmUNCg0KDQoNCi0tLS0tT3JpZ2lu YWwgTWVzc2FnZS0tLS0tDQpGcm9tOiBpbnRlcm5ldC1kcmFmdHNAaWV0Zi5vcmcgW21haWx0bzpp bnRlcm5ldC1kcmFmdHNAaWV0Zi5vcmddIA0KU2VudDogU3VuZGF5LCBPY3RvYmVyIDA0LCAyMDE1 IDEyOjIyIEFNDQpUbzogTW9oYW1lZCBCb3VjYWRhaXI7IFNodW5zdWtlIEhvbW1hOyBEaWVnbyBS LiBMb3BlejsgRGF2ZSBEb2xzb247IERpZWdvIExvcGV6OyBEYXZlIERvbHNvbjsgTW9oYW1lZCBC b3VjYWRhaXI7IERhcGVuZyBMaXU7IFNodW5zdWtlIEhvbW1hOyBEYXBlbmcgTGl1DQpTdWJqZWN0 OiBOZXcgVmVyc2lvbiBOb3RpZmljYXRpb24gZm9yIGRyYWZ0LWRvbHNvbi1zZmMtaGllcmFyY2hp Y2FsLTAzLnR4dA0KDQoNCkEgbmV3IHZlcnNpb24gb2YgSS1ELCBkcmFmdC1kb2xzb24tc2ZjLWhp ZXJhcmNoaWNhbC0wMy50eHQNCmhhcyBiZWVuIHN1Y2Nlc3NmdWxseSBzdWJtaXR0ZWQgYnkgRGF2 aWQgRG9sc29uIGFuZCBwb3N0ZWQgdG8gdGhlDQpJRVRGIHJlcG9zaXRvcnkuDQoNCk5hbWU6CQlk cmFmdC1kb2xzb24tc2ZjLWhpZXJhcmNoaWNhbA0KUmV2aXNpb246CTAzDQpUaXRsZToJCUhpZXJh cmNoaWNhbCBTZXJ2aWNlIEZ1bmN0aW9uIENoYWluaW5nDQpEb2N1bWVudCBkYXRlOgkyMDE1LTEw LTAyDQpHcm91cDoJCUluZGl2aWR1YWwgU3VibWlzc2lvbg0KUGFnZXM6CQkxNw0KVVJMOiAgICAg ICAgICAgIGh0dHBzOi8vd3d3LmlldGYub3JnL2ludGVybmV0LWRyYWZ0cy9kcmFmdC1kb2xzb24t c2ZjLWhpZXJhcmNoaWNhbC0wMy50eHQNClN0YXR1czogICAgICAgICBodHRwczovL2RhdGF0cmFj a2VyLmlldGYub3JnL2RvYy9kcmFmdC1kb2xzb24tc2ZjLWhpZXJhcmNoaWNhbC8NCkh0bWxpemVk OiAgICAgICBodHRwczovL3Rvb2xzLmlldGYub3JnL2h0bWwvZHJhZnQtZG9sc29uLXNmYy1oaWVy YXJjaGljYWwtMDMNCkRpZmY6ICAgICAgICAgICBodHRwczovL3d3dy5pZXRmLm9yZy9yZmNkaWZm P3VybDI9ZHJhZnQtZG9sc29uLXNmYy1oaWVyYXJjaGljYWwtMDMNCg0KQWJzdHJhY3Q6DQogICBI aWVyYXJjaGljYWwgU2VydmljZSBGdW5jdGlvbiBDaGFpbmluZyAoaFNGQykgaXMgYSBuZXR3b3Jr DQogICBhcmNoaXRlY3R1cmUgYWxsb3dpbmcgYW4gb3JnYW5pemF0aW9uIHRvIGNvbXBhcnRtZW50 YWxpemUgYSBsYXJnZS0NCiAgIHNjYWxlIG5ldHdvcmsgaW50byBtdWx0aXBsZSBkb21haW5zIG9m IGFkbWluaXN0cmF0aW9uLg0KDQogICBUaGUgZ29hbHMgb2YgaFNGQyBhcmUgdG8gbWFrZSBhIGxh cmdlLXNjYWxlIG5ldHdvcmsgZWFzaWVyIHRvIHJlYXNvbg0KICAgYWJvdXQsIHNpbXBsZXIgdG8g Y29udHJvbCBhbmQgdG8gc3VwcG9ydCBpbmRlcGVuZGVudCBmdW5jdGlvbmFsDQogICBncm91cHMg d2l0aGluIGxhcmdlIG9wZXJhdG9ycy4NCg0KICAgICAgICAgICAgICAgICAgICAgICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIA0KDQoN ClBsZWFzZSBub3RlIHRoYXQgaXQgbWF5IHRha2UgYSBjb3VwbGUgb2YgbWludXRlcyBmcm9tIHRo ZSB0aW1lIG9mIHN1Ym1pc3Npb24NCnVudGlsIHRoZSBodG1saXplZCB2ZXJzaW9uIGFuZCBkaWZm IGFyZSBhdmFpbGFibGUgYXQgdG9vbHMuaWV0Zi5vcmcuDQoNClRoZSBJRVRGIFNlY3JldGFyaWF0 DQoNCg== From nobody Tue Oct 6 00:38:46 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6223D1B399B for ; Tue, 6 Oct 2015 00:38:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ynxKyrbDpyWj for ; Tue, 6 Oct 2015 00:38:43 -0700 (PDT) Received: from rcdn-iport-9.cisco.com (rcdn-iport-9.cisco.com [173.37.86.80]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 5D1421B3999 for ; Tue, 6 Oct 2015 00:38:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=4167; q=dns/txt; s=iport; t=1444117123; x=1445326723; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=tNCwVWn5aEyRUjklwRvsKvsh1EUoGGw4k+y+5w4R6WY=; b=YDxYYnYIdv8TOFlsos0DJ93sDZ/07b/GX20Hz9CWRK1JomTvUut05de9 EnOKOfTq1Hpa25hjR3pPcU6xbUjQTE9orwxXn157d4HkgtQGzNJWtGic+ Q/heFnYG+pS1ZLtCuDZ+6i5MXqNe8FaqRUK9hiPnU1nugCGdobveTW+fa I=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0AHAgDteRNW/5xdJa1eglpNVF8PBr4XAQ2BWhcBCYV5AoE0OBQBAQEBAQEBgQqEJQEBBAEBAWsLEAIBCAQ7BycLFBECBA4FiC4NvjsBAQEBAQEBAQEBAQEBAQEBAQEBAQETBIkDgm6ENFkHgxqBFAWWAgGNFoFXhDmVXAEfAQFChAJxhnZDgQYBAQE X-IronPort-AV: E=Sophos; i="5.17,642,1437436800"; d="scan'208,217"; a="32953128" Received: from rcdn-core-5.cisco.com ([173.37.93.156]) by rcdn-iport-9.cisco.com with ESMTP; 06 Oct 2015 07:38:42 +0000 Received: from XCH-ALN-015.cisco.com (xch-aln-015.cisco.com [173.36.7.25]) by rcdn-core-5.cisco.com (8.14.5/8.14.5) with ESMTP id t967cgkR003152 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL) for ; Tue, 6 Oct 2015 07:38:42 GMT Received: from xch-rcd-011.cisco.com (173.37.102.21) by XCH-ALN-015.cisco.com (173.36.7.25) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Tue, 6 Oct 2015 02:38:41 -0500 Received: from xch-rcd-011.cisco.com ([173.37.102.21]) by XCH-RCD-011.cisco.com ([173.37.102.21]) with mapi id 15.00.1104.000; Tue, 6 Oct 2015 02:38:41 -0500 From: "Eric Wang (ejwang)" To: "Jim Guichard (jguichar)" Thread-Topic: [sfc] SFC WG agenda slots - Yokohama Thread-Index: AQHQ/2yEgKKh7mjWjUSUWGp1Wq1ho55eaQ4A Date: Tue, 6 Oct 2015 07:38:41 +0000 Message-ID: <6E5D79E1-96D6-46A6-AB3B-5C1FDC3F9FD2@cisco.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.1878.6) x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.19.59.182] Content-Type: multipart/alternative; boundary="_000_6E5D79E196D646A6AB3B5C1FDC3F9FD2ciscocom_" MIME-Version: 1.0 Archived-At: Cc: "sfc@ietf.org" Subject: Re: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Oct 2015 07:38:45 -0000 --_000_6E5D79E196D646A6AB3B5C1FDC3F9FD2ciscocom_ Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Hello Jim & Thomas, We would like to request a slot to present the use cases for network securi= ty, as documented in draft-wang-sfc-ns-use-cases-00. Those use cases raise= d some issues that might be interesting for us to solve as part of the WG. Thanks, -Eric On Oct 5, 2015, at 5:51 AM, Jim Guichard (jguichar) > wrote: Greetings WG: Our meeting in Yokohama is fast approaching. As always the goal of the meet= ing will be to make the best use of our limited face-to-face time. With tha= t in mind we welcome requests for agenda time. As we build the meeting agenda our goal will be to select presentations tha= t best further the work of the WG, and that generally means focusing on key= charter deliverables and topics with important open issues to resolve. Whe= n making a request please consider what you think the WG should do with its= content =96 for example: * Does the document have useful content that should be moved into anoth= er WG document or progress on its own merit * Does the content have a good basis for one of the WG documents per th= e charter * Should the document content be merged with one or more other document= s, so that a combined document could become a WG document Jim & Thomas _______________________________________________ sfc mailing list sfc@ietf.org https://www.ietf.org/mailman/listinfo/sfc --_000_6E5D79E196D646A6AB3B5C1FDC3F9FD2ciscocom_ Content-Type: text/html; charset="Windows-1252" Content-ID: <30C13C38D8672C47A2017A25A6C4DEE2@emea.cisco.com> Content-Transfer-Encoding: quoted-printable Hello Jim & Thomas,

We would like to request a slot to present the use cases for network s= ecurity, as documented in draft-wang-sfc-ns-use-cases-00.  Those use c= ases raised some issues that might be interesting for us to solve as part o= f the WG.

Thanks,
-Eric

  
On Oct 5, 2015, at 5:51 AM, Jim Guichard (jguichar) <jguichar@cisco.com> wrote:

Greetings WG:

Our meeting in Yokohama is fast approaching. As always the goal of the= meeting will be to make the best use of our limited face-to-face time. Wit= h that in mind we welcome requests for agenda time. 

As we build the meeting agenda our goal will be to select presentation= s that best further the work of the WG, and that generally means focusing o= n key charter deliverables and topics with important open issues to resolve= . When making a request please consider what you think the WG should do with its content =96 for example:
  • Does the document have useful content that should be moved into another= WG document or progress on its own merit
  • Does the content have a g= ood basis for one of the WG documents per the charter
  • Should the do= cument content be merged with one or more other documents, so that a combin= ed document could become a WG document
Jim & Thomas
_______________________________________________
sfc mailing list
sfc@ietf.org
https://www.ietf.org/mailman/listinfo/sfc

--_000_6E5D79E196D646A6AB3B5C1FDC3F9FD2ciscocom_-- From nobody Tue Oct 6 06:34:16 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7DCAF1AC3F0 for ; Tue, 6 Oct 2015 06:34:14 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.91 X-Spam-Level: X-Spam-Status: No, score=-6.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id kwXDZdRwuj-Q for ; Tue, 6 Oct 2015 06:34:13 -0700 (PDT) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by ietfa.amsl.com (Postfix) with ESMTP id AA0891AC3E5 for ; Tue, 6 Oct 2015 06:34:09 -0700 (PDT) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP; 06 Oct 2015 06:34:09 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,644,1437462000"; d="scan'208,217";a="804751525" Received: from orsmsx102.amr.corp.intel.com ([10.22.225.129]) by fmsmga001.fm.intel.com with ESMTP; 06 Oct 2015 06:34:06 -0700 Received: from orsmsx114.amr.corp.intel.com ([169.254.8.167]) by ORSMSX102.amr.corp.intel.com ([169.254.1.67]) with mapi id 14.03.0248.002; Tue, 6 Oct 2015 06:34:05 -0700 From: "Elzur, Uri" To: "Eric Wang (ejwang)" , "Jim Guichard (jguichar)" Thread-Topic: [sfc] SFC WG agenda slots - Yokohama - pls schedule earlier in the week Thread-Index: AdEAO3x+5FUWN5WKRJ6XAiqfrOLS+w== Date: Tue, 6 Oct 2015 13:34:05 +0000 Message-ID: <7E05C330D7FD6D4FAD0728C46B89958581DA590E@ORSMSX114.amr.corp.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.22.254.140] Content-Type: multipart/alternative; boundary="_000_7E05C330D7FD6D4FAD0728C46B89958581DA590EORSMSX114amrcor_" MIME-Version: 1.0 Archived-At: Cc: "sfc@ietf.org" Subject: Re: [sfc] SFC WG agenda slots - Yokohama - pls schedule earlier in the week X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Oct 2015 13:34:14 -0000 --_000_7E05C330D7FD6D4FAD0728C46B89958581DA590EORSMSX114amrcor_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi All I've reached out to the SFC chairs to ask for SFC to get more favorable sch= eduling this time around. At IETF Prague, it was on Fri. The Yokohama published agenda shows: SDNRG on Monday, NVO3 on Tuesday, NFV= RG on Wed and SFC on Thu. I assume many on this WG have interest in these W= Gs This time, the IETF meeting is in the week following OpenStack (Also in To= kyo). So this makes for a VERY long trip, for many, and really impossible f= or some. I'd like to ask for your help to get SFC WG scheduled earlier in the week t= o help participation level Thx Uri ("Oo-Ree") C: 949-378-7568 --_000_7E05C330D7FD6D4FAD0728C46B89958581DA590EORSMSX114amrcor_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi All

 

I’ve reached out to the SFC chairs to ask for = SFC to get more favorable scheduling this time around. At IETF Prague, it w= as on Fri.

The Yokohama  published agenda shows: SDNRG on = Monday, NVO3 on Tuesday, NFVRG on Wed and SFC on Thu. I assume many on this= WG have interest in these WGs

This time,  the IETF meeting is in the week fol= lowing OpenStack (Also in Tokyo). So this makes for a VERY long trip, for m= any, and really impossible for some.

 

I’d like to ask for your help to get SFC WG sc= heduled earlier in the week to help participation level

 

Thx

 

Uri (“Oo-Ree”)=

C: 949-378-7568

 

--_000_7E05C330D7FD6D4FAD0728C46B89958581DA590EORSMSX114amrcor_-- From nobody Tue Oct 6 09:51:04 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F0AA51ACEA2 for ; Tue, 6 Oct 2015 09:51:02 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.75 X-Spam-Level: X-Spam-Status: No, score=-1.75 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, SPF_PASS=-0.001] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id YCA1__jh_Y-9 for ; Tue, 6 Oct 2015 09:51:01 -0700 (PDT) Received: from mail-qk0-x22c.google.com (mail-qk0-x22c.google.com [IPv6:2607:f8b0:400d:c09::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 99A201ACE98 for ; Tue, 6 Oct 2015 09:50:58 -0700 (PDT) Received: by qkht68 with SMTP id t68so4068453qkh.3 for ; Tue, 06 Oct 2015 09:50:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:reply-to:in-reply-to:references:date:message-id :subject:from:to:cc:content-type:content-transfer-encoding; bh=GOrbd0gy47EGizTJr4c13QPDDoWc8syZa8YnewD6Wns=; b=CTw8yW76QhEPjx38vDdgXGqKpqbLoQxjzT2J4dwwe3PwuvZRUVjUMWg7U61x4k5E0e pdf7fRSKlwVBvzbCLYxl08S4huTggReO1XdDe7k64Eet/zcwR+q1DoPY5ToDoSnQ3tKe 8mtkn64l76JNNsBAvvEOHUHvP1Pgb5wkn2lKbWvwbiiVYLp01KF5TdA9aWn2lW0A2pVp futpIvFpbmMyYWoKM5hsWCQcNhJOJxLivOsEMwT1vUFaEGP7hdoVTg53jcNNFdDUpx8z XZOH3CHaDpNaAZDlIymCM+7NBHRCYD36w9TKHEc2DjlCdZvZ+KXzd2QplRltHBWbvRNa iUuw== MIME-Version: 1.0 X-Received: by 10.55.192.81 with SMTP id o78mr3751651qki.97.1444150257743; Tue, 06 Oct 2015 09:50:57 -0700 (PDT) Received: by 10.233.216.194 with HTTP; Tue, 6 Oct 2015 09:50:57 -0700 (PDT) In-Reply-To: References: Date: Tue, 6 Oct 2015 11:50:57 -0500 Message-ID: From: Behcet Sarikaya To: "Jim Guichard (jguichar)" Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Archived-At: Cc: Mohamed Boucadair , "sfc@ietf.org" , "Dirk.von-Hugo@telekom.de" Subject: Re: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: sarikaya@ieee.org List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Oct 2015 16:51:03 -0000 Hi Jim & Thomas, Can we please have a slot to present our draft on SFC Service Header for Host Identification, draft-sarikaya-sfc-hostid-serviceheader-00.txt? Regards, Behcet On Mon, Oct 5, 2015 at 7:51 AM, Jim Guichard (jguichar) wrote: > Greetings WG: > > Our meeting in Yokohama is fast approaching. As always the goal of the > meeting will be to make the best use of our limited face-to-face time. Wi= th > that in mind we welcome requests for agenda time. > > As we build the meeting agenda our goal will be to select presentations t= hat > best further the work of the WG, and that generally means focusing on key > charter deliverables and topics with important open issues to resolve. Wh= en > making a request please consider what you think the WG should do with its > content =E2=80=93 for example: > > Does the document have useful content that should be moved into another W= G > document or progress on its own merit > Does the content have a good basis for one of the WG documents per the > charter > Should the document content be merged with one or more other documents, s= o > that a combined document could become a WG document > > Jim & Thomas > > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc > From nobody Tue Oct 6 22:41:31 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id EA35E1A8A0F for ; Tue, 6 Oct 2015 22:41:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.011 X-Spam-Level: X-Spam-Status: No, score=-2.011 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07:20:41 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E978F1A01F9 for ; Thu, 8 Oct 2015 07:20:38 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -7.01 X-Spam-Level: X-Spam-Status: No, score=-7.01 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Y0u7qbi2cNTg for ; Thu, 8 Oct 2015 07:20:33 -0700 (PDT) Received: from ausxippc101.us.dell.com (ausxippc101.us.dell.com [143.166.85.207]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E4E851A01F7 for ; Thu, 8 Oct 2015 07:20:32 -0700 (PDT) DomainKey-Signature: s=smtpout; d=dell.com; c=nofws; q=dns; h=X-LoopCount0:X-IronPort-AV:From:To:CC:Date:Subject: Thread-Topic:Thread-Index:Message-ID:References: In-Reply-To:Accept-Language:Content-Language: X-MS-Has-Attach:X-MS-TNEF-Correlator:acceptlanguage: Content-Type:MIME-Version; b=M8pMewrMiKnHmZ+wiRVHeSI5VinpAzpRCosaV0NawihClOcKTLno1uMV W6PxOMwITfn4/+BwQX9hIwIxJC6Q1EirSZBvVly0ticFB9DNKLDSq+25j wTAV2odu8s7m/qRIh2nONilH/ArJrYq/yCUE5ckHX2TChZKpdBAGzQ+TD o=; X-LoopCount0: from 10.170.28.41 X-IronPort-AV: E=Sophos;i="5.17,655,1437454800"; d="scan'208,217";a="716872148" From: To: , , Date: Thu, 8 Oct 2015 09:20:30 -0500 Thread-Topic: [sfc] SFC WG agenda slots - Yokohama - pls schedule earlier in the week Thread-Index: AdEAO3x+5FUWN5WKRJ6XAiqfrOLS+wBmPspw Message-ID: References: <7E05C330D7FD6D4FAD0728C46B89958581DA590E@ORSMSX114.amr.corp.intel.com> In-Reply-To: <7E05C330D7FD6D4FAD0728C46B89958581DA590E@ORSMSX114.amr.corp.intel.com> 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_DF91EBC32A031943A8B78D81D40122BC065B70DE59AUSX7MCPC103A_" MIME-Version: 1.0 Archived-At: Cc: sfc@ietf.org Subject: Re: [sfc] SFC WG agenda slots - Yokohama - pls schedule earlier in the week X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Oct 2015 14:20:39 -0000 --_000_DF91EBC32A031943A8B78D81D40122BC065B70DE59AUSX7MCPC103A_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable +1. From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Elzur, Uri Sent: Tuesday, October 06, 2015 6:34 AM To: Eric Wang (ejwang); Jim Guichard (jguichar) Cc: sfc@ietf.org Subject: Re: [sfc] SFC WG agenda slots - Yokohama - pls schedule earlier in= the week Hi All I've reached out to the SFC chairs to ask for SFC to get more favorable sch= eduling this time around. At IETF Prague, it was on Fri. The Yokohama published agenda shows: SDNRG on Monday, NVO3 on Tuesday, NFV= RG on Wed and SFC on Thu. I assume many on this WG have interest in these W= Gs This time, the IETF meeting is in the week following OpenStack (Also in To= kyo). So this makes for a VERY long trip, for many, and really impossible f= or some. I'd like to ask for your help to get SFC WG scheduled earlier in the week t= o help participation level Thx Uri ("Oo-Ree") C: 949-378-7568 --_000_DF91EBC32A031943A8B78D81D40122BC065B70DE59AUSX7MCPC103A_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

+1.

 

From: sfc [mailto:sfc-bounces@ietf.org] On Behal= f Of Elzur, Uri
Sent: Tuesday, October 06, 2015 6:34 AM
To: Eric Wang (ejwang); Jim Guichard (jguichar)
Cc: sfc@ietf= .org
Subject: Re: [sfc] SFC WG agenda slots - Yokohama - pls sche= dule earlier in the week

 

H= i All

 

I’ve reached out = to the SFC chairs to ask for SFC to get more favorable scheduling this time= around. At IETF Prague, it was on Fri.

The Yokohama  published agenda shows: SDNRG on Monday, NVO3 on Tuesda= y, NFVRG on Wed and SFC on Thu. I assume many on this WG have interest in t= hese WGs

 

This time,  the IETF meeting is in the week following Ope= nStack (Also in Tokyo). So this makes for a VERY long trip, for many, and r= eally impossible for some.

 

I’d like to ask for your help to get SFC= WG scheduled earlier in the week to help participation level

 

Thx

 

Uri (“Oo-Ree”)

C: 949-378-7568

 

<= /html>= --_000_DF91EBC32A031943A8B78D81D40122BC065B70DE59AUSX7MCPC103A_-- From nobody Thu Oct 8 09:23:20 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E7C141A9104 for ; Thu, 8 Oct 2015 09:23:18 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.199 X-Spam-Level: X-Spam-Status: No, score=-4.199 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id M-0muBE9zyZn for ; Thu, 8 Oct 2015 09:23:16 -0700 (PDT) Received: from g2t2352.austin.hp.com (g2t2352.austin.hp.com [15.217.128.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 522971A9101 for ; Thu, 8 Oct 2015 09:23:16 -0700 (PDT) Received: from G2W4316.americas.hpqcorp.net (g2w4316.austin.hp.com [16.197.9.73]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by g2t2352.austin.hp.com (Postfix) with ESMTPS id 794B054; Thu, 8 Oct 2015 16:23:15 +0000 (UTC) Received: from G2W4312.americas.hpqcorp.net (16.197.24.214) by G2W4316.americas.hpqcorp.net (16.197.9.73) with Microsoft SMTP Server (TLS) id 14.3.169.1; Thu, 8 Oct 2015 16:20:43 +0000 Received: from G2W2435.americas.hpqcorp.net ([169.254.5.134]) by G2W4312.americas.hpqcorp.net ([16.197.24.214]) with mapi id 14.03.0169.001; Thu, 8 Oct 2015 16:20:43 +0000 From: "Bottorff, Paul" To: "Jim Guichard (jguichar)" , "sfc@ietf.org" Thread-Topic: SFC WG agenda slots - Yokohama Thread-Index: AQHQ/2yEgKKh7mjWjUSUWGp1Wq1ho55eqJFQgAMjBSA= Date: Thu, 8 Oct 2015 16:20:43 +0000 Message-ID: <94DA9C7F532AD946852C9C55271952392548A527@G2W2435.americas.hpqcorp.net> References: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [16.193.232.28] Content-Type: multipart/alternative; boundary="_000_94DA9C7F532AD946852C9C55271952392548A527G2W2435americas_" MIME-Version: 1.0 Archived-At: Cc: "Fedyk, Don" Subject: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Oct 2015 16:23:19 -0000 --_000_94DA9C7F532AD946852C9C55271952392548A527G2W2435americas_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Jim and Thomas: Don Fedyk and I would like a slot to introduce draft-fedyk-sfc-mac-chain-00= . The MAC Chai= ning technology can be very effective for building SFCs in some settings, p= articularly in data centers and enterprise networks. Cheers, Paul From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Jim Guichard (jguichar= ) Sent: Monday, October 05, 2015 5:51 AM To: sfc@ietf.org Subject: [sfc] SFC WG agenda slots - Yokohama Greetings WG: Our meeting in Yokohama is fast approaching. As always the goal of the meet= ing will be to make the best use of our limited face-to-face time. With tha= t in mind we welcome requests for agenda time. As we build the meeting agenda our goal will be to select presentations tha= t best further the work of the WG, and that generally means focusing on key= charter deliverables and topics with important open issues to resolve. Whe= n making a request please consider what you think the WG should do with its= content - for example: * Does the document have useful content that should be moved into anoth= er WG document or progress on its own merit * Does the content have a good basis for one of the WG documents per th= e charter * Should the document content be merged with one or more other document= s, so that a combined document could become a WG document Jim & Thomas --_000_94DA9C7F532AD946852C9C55271952392548A527G2W2435americas_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Jim and Thomas:<= /p>

 

Don Fedyk and I would like a slot to = introduce draft-fedyk-sfc= -mac-chain-00. The MAC Chaining technology can be very effective for building SFCs in some settings, particularly in = data centers and enterprise networks.

 

Cheers,

 

Paul

 

From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Jim Guichard (jguichar)
Sent: Monday, October 05, 2015 5:51 AM
To: sfc@ietf.org
Subject: [sfc] SFC WG agenda slots - Yokohama

 

Greetings WG:

 

Our meeting in Yokohama is fast approac= hing. As always the goal of the meeting will be to make the best use of our= limited face-to-face time. With that in mind we welcome requests for agenda time. 

 

As we build the meeting agenda our goal= will be to select presentations that best further the work of the WG, and = that generally means focusing on key charter deliverables and topics with important open issues to resolve. When making a request pl= ease consider what you think the WG should do with its content – for = example:

  • Does the document have useful content that should be moved into another WG= document or progress on its own merit
  • Does the content have a good basis for one of the WG documents per the cha= rter
  • Should the document content be merged with one or more other documents, so= that a combined document could become a WG document
    • =

Jim & Thomas

--_000_94DA9C7F532AD946852C9C55271952392548A527G2W2435americas_-- From nobody Fri Oct 9 14:09:29 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 596261B4C82 for ; Fri, 9 Oct 2015 14:09:29 -0700 (PDT) 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=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id alnMFBcg7pRQ for ; Fri, 9 Oct 2015 14:09:25 -0700 (PDT) Received: from smtpjc.telefonica.com (smtpjc.telefonica.com [81.47.204.76]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 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SFS:(10019020)(199003)(189002)(252514010)(53754006)(24454002)(66066001)(2950100001)(40100003)(86362001)(50986999)(5008740100001)(54356999)(64706001)(5001960100002)(110136002)(122556002)(19580405001)(83716003)(19580395003)(10400500002)(36756003)(11100500001)(15975445007)(5002640100001)(97736004)(19617315012)(81156007)(105586002)(106356001)(102836002)(33656002)(92566002)(76176999)(77096005)(189998001)(87936001)(5007970100001)(46102003)(2900100001)(82746002)(101416001)(5004730100002)(16236675004)(104396002); DIR:OUT; SFP:1102; SCL:1; SRVR:DB4PR06MB0624; H:DB4PR06MB0624.eurprd06.prod.outlook.com; FPR:; SPF:None; PTR:InfoNoRecords; A:1; MX:1; LANG:en; received-spf: None (protection.outlook.com: telefonica.com does not designate permitted sender hosts) spamdiagnosticoutput: 1:23 spamdiagnosticmetadata: NSPM Content-Type: multipart/alternative; boundary="_000_1B3D2ADFE4B6400B835C4FD2C2CEADF9telefonicacom_" MIME-Version: 1.0 X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Oct 2015 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E=Sophos;i="5.17,659,1437462000"; d="scan'208,217";a="661324922" Received: from orsmsx105.amr.corp.intel.com ([10.22.225.132]) by orsmga003.jf.intel.com with ESMTP; 09 Oct 2015 14:33:29 -0700 Received: from orsmsx114.amr.corp.intel.com ([169.254.8.29]) by ORSMSX105.amr.corp.intel.com ([169.254.4.217]) with mapi id 14.03.0248.002; Fri, 9 Oct 2015 14:32:34 -0700 From: "Elzur, Uri" To: DIEGO LOPEZ GARCIA Thread-Topic: [sfc] SFC WG agenda slots - Yokohama - pls schedule earlier in the week Thread-Index: AdEAO3x+5FUWN5WKRJ6XAiqfrOLS+wCm0VqAAADMSOA= Date: Fri, 9 Oct 2015 21:32:33 +0000 Message-ID: <7E05C330D7FD6D4FAD0728C46B89958581DEA9A0@ORSMSX114.amr.corp.intel.com> References: <7E05C330D7FD6D4FAD0728C46B89958581DA590E@ORSMSX114.amr.corp.intel.com> <1B3D2ADF-E4B6-400B-835C-4FD2C2CEADF9@telefonica.com> In-Reply-To: <1B3D2ADF-E4B6-400B-835C-4FD2C2CEADF9@telefonica.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.22.254.140] 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RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id vvP-miFkEz8D for ; Mon, 12 Oct 2015 04:31:09 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 51FD91ACE71 for ; Mon, 12 Oct 2015 04:31:08 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml403-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CCL13335; Mon, 12 Oct 2015 11:31:05 +0000 (GMT) Received: from SZXEMA414-HUB.china.huawei.com (10.82.72.73) by lhreml403-hub.china.huawei.com (10.201.5.217) with Microsoft SMTP Server (TLS) id 14.3.235.1; Mon, 12 Oct 2015 12:31:04 +0100 Received: from SZXEMA506-MBS.china.huawei.com ([169.254.4.235]) by SZXEMA414-HUB.china.huawei.com ([10.82.72.73]) with mapi id 14.03.0235.001; Mon, 12 Oct 2015 19:30:54 +0800 From: Jiangyuanlong To: "Jim Guichard (jguichar)" , "sfc@ietf.org" Thread-Topic: SFC WG agenda slots - Yokohama Thread-Index: AQHQ/2yEgKKh7mjWjUSUWGp1Wq1ho55nwlIg Date: Mon, 12 Oct 2015 11:30:54 +0000 Message-ID: <3B0A1BED22CAD649A1B3E97BE5DDD68B6827D45A@szxema506-mbs.china.huawei.com> References: In-Reply-To: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.66.76.118] Content-Type: multipart/alternative; boundary="_000_3B0A1BED22CAD649A1B3E97BE5DDD68B6827D45Aszxema506mbschi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Cc: "Xuweiping \(A\)" Subject: Re: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Oct 2015 11:31:12 -0000 --_000_3B0A1BED22CAD649A1B3E97BE5DDD68B6827D45Aszxema506mbschi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Jim & Thomas, We will update our draft-jxc-sfc-fm (on SFC OAM) to a new version soon. Cou= ld you please allocate a slot for us to present it? Regards, Yuanlong & Weiping From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Jim Guichard (jguichar= ) Sent: Monday, October 05, 2015 8:51 PM To: sfc@ietf.org Subject: [sfc] SFC WG agenda slots - Yokohama Greetings WG: Our meeting in Yokohama is fast approaching. As always the goal of the meet= ing will be to make the best use of our limited face-to-face time. With tha= t in mind we welcome requests for agenda time. As we build the meeting agenda our goal will be to select presentations tha= t best further the work of the WG, and that generally means focusing on key= charter deliverables and topics with important open issues to resolve. Whe= n making a request please consider what you think the WG should do with its= content - for example: * Does the document have useful content that should be moved into a= nother WG document or progress on its own merit * Does the content have a good basis for one of the WG documents pe= r the charter * Should the document content be merged with one or more other docu= ments, so that a combined document could become a WG document Jim & Thomas --_000_3B0A1BED22CAD649A1B3E97BE5DDD68B6827D45Aszxema506mbschi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Jim & Thomas,

 

We will update our draft-jxc-sfc-fm (on SFC OAM) to a new version soon. = Could you please allocate a slot for us to present it?

 

Regards,

Yuanlong & Weiping

 

 = ;

From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Jim Guichard (jguich= ar)
Sent: Monday, October 05, 2015 8:51 PM
To: sfc@ietf.org
Subject: [sfc] SFC WG agenda slots - Yokohama

 

Greetings WG:

 

Our meeting in Yokohama is fast approaching. As always the goal of the meeting will be to make the best use of our limited= face-to-face time. With that in mind we welcome requests for agenda time.&= nbsp;

 

As we build the meeting agenda our goal will be to select presentations that best further the work of the WG, and that gen= erally means focusing on key charter deliverables and topics with important= open issues to resolve. When making a request please consider what you thi= nk the WG should do with its content – for example:

·=    &n= bsp;     Does the document have usef= ul content that should be moved into another WG document or progress on its own merit

·=    &n= bsp;     Does the content have a goo= d basis for one of the WG documents per the charter

·=    &n= bsp;     Should the document content= be merged with one or more other documents, so that a combined document could become a WG document

Jim & Thomas

--_000_3B0A1BED22CAD649A1B3E97BE5DDD68B6827D45Aszxema506mbschi_-- From nobody Tue Oct 13 19:18:12 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 929FD1A90C9 for ; Tue, 13 Oct 2015 19:18:10 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id cXZD3tUD3hk8 for ; Tue, 13 Oct 2015 19:18:08 -0700 (PDT) Received: from alln-iport-6.cisco.com (alln-iport-6.cisco.com [173.37.142.93]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 5997B1A00BE for ; Tue, 13 Oct 2015 19:18:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=12424; q=dns/txt; s=iport; t=1444789088; x=1445998688; h=from:to:subject:date:message-id:references:in-reply-to: mime-version; bh=3GeluAc+ng5tOj7GbRjEvqXw/aza33idjJ+s3y8Kgk4=; b=GdPwzzipMa4qivMBzlVSW0KGbNikMEABLCFs8hf4q1Vg0cE/j3+Vpvl5 uAYrs9d6EeUGusAawiSzvqY58TpppC0K5oPBrs/D9AUqgX4HzqEge/RWi lnsbreoZvzkLlwxxHw/eQJP6yuIlAplJdAH/aU96DPUDi/VVEj+pzFr8d A=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0DiAgAbux1W/4sNJK1egllNVG4GvgsBDYFaIYJyggp/AoFCOBQBAQEBAQEBgQqEJgEBAQQtXAIBCBEEAQEoBzIUCQgCBAESCIgmDcJaAQEBAQEBAQEBAQEBAQEBAQEBAQEBEwSLc4Q0VQoBhC4FklaDQAGFGId6gV+EOpV1AR8BAUKEAnGFKEOBBgEBAQ X-IronPort-AV: E=Sophos;i="5.17,681,1437436800"; d="scan'208,217";a="197599922" Received: from alln-core-6.cisco.com ([173.36.13.139]) by alln-iport-6.cisco.com with ESMTP; 14 Oct 2015 02:18:07 +0000 Received: from XCH-ALN-010.cisco.com (xch-aln-010.cisco.com [173.36.7.20]) by alln-core-6.cisco.com (8.14.5/8.14.5) with ESMTP id t9E2I7YW006232 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL) for ; Wed, 14 Oct 2015 02:18:07 GMT Received: from xch-rcd-020.cisco.com (173.37.102.30) by XCH-ALN-010.cisco.com (173.36.7.20) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Tue, 13 Oct 2015 21:17:53 -0500 Received: from xch-rcd-020.cisco.com ([173.37.102.30]) by XCH-RCD-020.cisco.com ([173.37.102.30]) with mapi id 15.00.1104.000; Tue, 13 Oct 2015 21:17:53 -0500 From: "Surendra Kumar (smkumar)" To: "Jim Guichard (jguichar)" , "sfc@ietf.org" Thread-Topic: SFC WG agenda slots - Yokohama Thread-Index: AQHQ/2yEgKKh7mjWjUSUWGp1Wq1ho55qS8Pg Date: Wed, 14 Oct 2015 02:17:53 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.37.131] Content-Type: multipart/alternative; boundary="_000_b63f6c88f4ec4de8b86b1c9fb71b29efXCHRCD020ciscocom_" MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Oct 2015 02:18:10 -0000 --_000_b63f6c88f4ec4de8b86b1c9fb71b29efXCHRCD020ciscocom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello Charis, We would like to request a slot to present the UDP Transport Encapsulation = for NSH: https://datatracker.ietf.org/doc/draft-kumar-sfc-nsh-udp-transport= / We presented this at RTG WG this summer. Based on the guidance, we would li= ke to present the draft in its home WG. Surendra. From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Jim Guichard (jguichar= ) Sent: Monday, October 05, 2015 5:51 AM To: sfc@ietf.org Subject: [sfc] SFC WG agenda slots - Yokohama Greetings WG: Our meeting in Yokohama is fast approaching. As always the goal of the meet= ing will be to make the best use of our limited face-to-face time. With tha= t in mind we welcome requests for agenda time. As we build the meeting agenda our goal will be to select presentations tha= t best further the work of the WG, and that generally means focusing on key= charter deliverables and topics with important open issues to resolve. Whe= n making a request please consider what you think the WG should do with its= content - for example: * Does the document have useful content that should be moved into anoth= er WG document or progress on its own merit * Does the content have a good basis for one of the WG documents per th= e charter * Should the document content be merged with one or more other document= s, so that a combined document could become a WG document Jim & Thomas --_000_b63f6c88f4ec4de8b86b1c9fb71b29efXCHRCD020ciscocom_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hello Charis,

 

We would like to request a slot to present the UDP = Transport Encapsulation for NSH: https://datatracker.ietf.org/doc/draft-kumar-sfc-nsh-udp-transport/

We presented this at RTG WG this summer. Based on t= he guidance, we would like to present the draft in its home WG.<= /span>

 

Surendra.

 

From: sfc [mailto:sfc-bounces@ietf.o= rg] On Behalf Of Jim Guichard (jguichar)
Sent: Monday, October 05, 2015 5:51 AM
To: sfc@ietf.org
Subject: [sfc] SFC WG agenda slots - Yokohama

 

Greetings WG:

 

Our meeting in Yokohama is fast approac= hing. As always the goal of the meeting will be to make the best use of our= limited face-to-face time. With that in mind we welcome requests for agenda time. 

 

As we build the meeting agenda our goal= will be to select presentations that best further the work of the WG, and = that generally means focusing on key charter deliverables and topics with important open issues to resolve. When making a request pl= ease consider what you think the WG should do with its content – for = example:

  • Does the document have useful content that should be moved into another WG= document or progress on its own merit
  • Does the content have a good basis for one of the WG documents per the cha= rter
  • Should the document content be merged with one or more other documents, so= that a combined document could become a WG document
    • =

Jim & Thomas

--_000_b63f6c88f4ec4de8b86b1c9fb71b29efXCHRCD020ciscocom_-- From nobody Tue Oct 13 19:21:29 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 575961A90C9 for ; Tue, 13 Oct 2015 19:21:27 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.21 X-Spam-Level: X-Spam-Status: No, score=-4.21 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JYVDb_FOvdMh for ; Tue, 13 Oct 2015 19:21:24 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C91011A9054 for ; Tue, 13 Oct 2015 19:21:23 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml401-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CCN13597; Wed, 14 Oct 2015 02:21:21 +0000 (GMT) Received: from nkgeml407-hub.china.huawei.com (10.98.56.38) by lhreml401-hub.china.huawei.com (10.201.5.240) with Microsoft SMTP Server (TLS) id 14.3.235.1; Wed, 14 Oct 2015 03:21:20 +0100 Received: from NKGEML512-MBS.china.huawei.com ([169.254.8.187]) by nkgeml407-hub.china.huawei.com ([10.98.56.38]) with mapi id 14.03.0235.001; Wed, 14 Oct 2015 10:21:17 +0800 From: Xuxiaohu To: "Jim Guichard (jguichar)" , "sfc@ietf.org" Thread-Topic: SFC WG agenda slots - Yokohama Thread-Index: AQHQ/2yEgKKh7mjWjUSUWGp1Wq1ho55qTqIw Date: Wed, 14 Oct 2015 02:21:16 +0000 Message-ID: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB368A7@NKGEML512-MBS.china.huawei.com> References: In-Reply-To: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.111.99.55] Content-Type: multipart/alternative; boundary="_000_1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB368A7NKGEML512MBSchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Subject: Re: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Oct 2015 02:21:27 -0000 --_000_1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB368A7NKGEML512MBSchi_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi co-chairs, I would like to request a 10-min slot for presenting https://tools.ietf.org= /html/draft-xu-sfc-using-mpls-spring-04 Best regards, Xiaohu From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Jim Guichard (jguichar= ) Sent: Monday, October 05, 2015 8:51 PM To: sfc@ietf.org Subject: [sfc] SFC WG agenda slots - Yokohama Greetings WG: Our meeting in Yokohama is fast approaching. As always the goal of the meet= ing will be to make the best use of our limited face-to-face time. With tha= t in mind we welcome requests for agenda time. As we build the meeting agenda our goal will be to select presentations tha= t best further the work of the WG, and that generally means focusing on key= charter deliverables and topics with important open issues to resolve. Whe= n making a request please consider what you think the WG should do with its= content - for example: * Does the document have useful content that should be moved into anoth= er WG document or progress on its own merit * Does the content have a good basis for one of the WG documents per th= e charter * Should the document content be merged with one or more other document= s, so that a combined document could become a WG document Jim & Thomas --_000_1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB368A7NKGEML512MBSchi_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi co-chai= rs,

 = ;

I would li= ke to request a 10-min slot for presenting h= ttps://tools.ietf.org/html/draft-xu-sfc-using-mpls-spring-04=

 = ;

Best regar= ds,

Xiaohu

 = ;

From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Jim Guichard (jguichar)
Sent: Monday, October 05, 2015 8:51 PM
To: sfc@ietf.org
Subject: [sfc] SFC WG agenda slots - Yokohama

 

Greetings WG= :

 <= /o:p>

Our meeting = in Yokohama is fast approaching. As always the goal of the meeting will be = to make the best use of our limited face-to-face time. With that in mind we welcome requests for agenda time. <= /p>

 <= /o:p>

As we build = the meeting agenda our goal will be to select presentations that best furth= er the work of the WG, and that generally means focusing on key charter deliverables and topics with important open issues to resolve.= When making a request please consider what you think the WG should do with= its content – for example:

  • Does the document have useful content that shou= ld be moved into another WG document or progress on its own merit
  • Does the content have a good basis for one of t= he WG documents per the charter
  • Should the document content be merged with one = or more other documents, so that a combined document could become a WG docu= ment

Jim & Th= omas

--_000_1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB368A7NKGEML512MBSchi_-- From nobody Wed Oct 14 01:57:15 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 67CBE1B2CBD for ; Wed, 14 Oct 2015 01:57:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.05 X-Spam-Level: X-Spam-Status: No, score=-2.05 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, MIME_8BIT_HEADER=0.3, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UtB_OG6xo5cO for ; Wed, 14 Oct 2015 01:57:08 -0700 (PDT) Received: from SNT004-OMC2S16.hotmail.com (snt004-omc2s16.hotmail.com [65.55.90.91]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8F1DC1B2CB6 for ; Wed, 14 Oct 2015 01:57:08 -0700 (PDT) Received: from SNT146-DS3 ([65.55.90.71]) by SNT004-OMC2S16.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.23008); Wed, 14 Oct 2015 01:57:07 -0700 X-TMN: [w8D8b4KQg/FSlMbe83e9snsLEdJ4TY+SEypegcJi+50=] X-Originating-Email: [fuqiao1@outlook.com] Message-ID: From: Fu Qiao To: Date: Wed, 14 Oct 2015 16:57:05 +0800 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: AdEGWwGn/YfOcQ3eSn+hCwR6LAK2pgAAA5Mw Content-Language: zh-cn X-OriginalArrivalTime: 14 Oct 2015 08:57:07.0768 (UTC) FILETIME=[4E1D2380:01D1065E] Archived-At: Subject: [sfc] =?utf-8?b?6L2s5Y+ROiBOZXcgVmVyc2lvbiBOb3RpZmljYXRpb24gZm9y?= =?utf-8?q?_draft-fu-sfc-topology-01=2Etxt?= X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Oct 2015 08:57:13 -0000 Hi, all. I have upload a new version of the SFC topology draft. This = draft mainly discusses the deployment topology of SFC in the operators' = network. Comparing with the SFC architecture, this draft tries to = explain the deployment details of SFC in the operator networks. Your comments are more than welcome:) -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6----- =E5=8F=91=E4=BB=B6=E4=BA=BA: internet-drafts@ietf.org = [mailto:internet-drafts@ietf.org]=20 =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: = 2015=E5=B9=B410=E6=9C=8814=E6=97=A5 16:33 =E6=94=B6=E4=BB=B6=E4=BA=BA: Qiao Fu; Hui Deng; Joel. Halpern; Joel M. = Halpern =E4=B8=BB=E9=A2=98: New Version Notification for = draft-fu-sfc-topology-01.txt A new version of I-D, draft-fu-sfc-topology-01.txt has been successfully submitted by Qiao Fu and posted to the IETF repository. Name: draft-fu-sfc-topology Revision: 01 Title: The topology of service function chaining Document date: 2015-10-14 Group: Individual Submission Pages: 10 URL: = https://www.ietf.org/internet-drafts/draft-fu-sfc-topology-01.txt Status: https://datatracker.ietf.org/doc/draft-fu-sfc-topology/ Htmlized: https://tools.ietf.org/html/draft-fu-sfc-topology-01 Diff: = https://www.ietf.org/rfcdiff?url2=3Ddraft-fu-sfc-topology-01 Abstract: This document proposes a deployment topology of Service Function Chaining(SFC). The topology is in accordance with the SFC architecture in [I-D.ietf-sfc-architecture]. Currently, such architecture only includes architectural concepts, principles, and components used in the construction of composite services through deployment of SFCs, without any instruction for the field deployment. It is still difficult to map from the architecture to a real deployment of SFC. In this document, we propose this topology which will give instructions for the field deployments. We further propose a VCPE usecase of SFC in the transport network, which explains the details of the deployment topology. = =20 Please note that it may take a couple of minutes from the time of = submission until the htmlized version and diff are available at tools.ietf.org. The IETF Secretariat From nobody Wed Oct 14 02:22:44 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 817871B2CCD; Wed, 14 Oct 2015 02:22:39 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.9 X-Spam-Level: X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id diD89ZBTQEaA; Wed, 14 Oct 2015 02:22:35 -0700 (PDT) Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 19A351A032D; Wed, 14 Oct 2015 02:22:24 -0700 (PDT) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit From: internet-drafts@ietf.org To: X-Test-IDTracker: no X-IETF-IDTracker: 6.5.1 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <20151014092224.23662.90866.idtracker@ietfa.amsl.com> Date: Wed, 14 Oct 2015 02:22:24 -0700 Archived-At: Cc: sfc@ietf.org Subject: [sfc] I-D Action: draft-ietf-sfc-use-case-mobility-05.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Oct 2015 09:22:39 -0000 A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Service Function Chaining Working Group of the IETF. Title : Service Function Chaining Use Cases in Mobile Networks Authors : Walter Haeffner Jeffrey Napper Martin Stiemerling Diego R. Lopez Jim Uttaro Filename : draft-ietf-sfc-use-case-mobility-05.txt Pages : 26 Date : 2015-10-14 Abstract: This document provides some exemplary use cases for service function chaining in mobile service provider networks. The objective of this draft is not to cover all conceivable service chains in detail. Rather, the intention is to localize and explain the application domain of service chaining within mobile networks as far as it is required to complement the problem statement [RFC7498] and architecture framework [ietf-sfc-arch] of the working group. Service function chains typically reside in a LAN segment which links the mobile access network to the actual application platforms located in the carrier's datacenters or somewhere else in the Internet. Service function chains (SFC) ensure a fair distribution of network resources according to agreed service policies, enhance the performance of service delivery or take care of security and privacy. SFCs may also include Value Added Services (VAS). Commonly, SFCs are typical middle box based services. General considerations and specific use cases are presented in this document to demonstrate the different technical requirements of these goals for service function chaining in mobile service provider networks. The specification of service function chaining for mobile networks must take into account an interaction between service function chains and the 3GPP Policy and Charging Control (PCC) environment. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-ietf-sfc-use-case-mobility/ There's also a htmlized version available at: https://tools.ietf.org/html/draft-ietf-sfc-use-case-mobility-05 A diff from the previous version is available at: https://www.ietf.org/rfcdiff?url2=draft-ietf-sfc-use-case-mobility-05 Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/ From nobody Wed Oct 14 02:27:56 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 009AD1B2D24 for ; Wed, 14 Oct 2015 02:27:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2gA0DOg7aP45 for ; Wed, 14 Oct 2015 02:27:51 -0700 (PDT) Received: from alln-iport-8.cisco.com (alln-iport-8.cisco.com [173.37.142.95]) (using TLSv1 with cipher RC4-SHA (128/128 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<20151014092224.23662.90866.idtracker@ietfa.amsl.com> In-Reply-To: <20151014092224.23662.90866.idtracker@ietfa.amsl.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.61.173.187] Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] I-D Action: draft-ietf-sfc-use-case-mobility-05.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 14 Oct 2015 09:27:55 -0000 VGhpcyB1cGRhdGUgZml4ZXMgc29tZSB0eXBvcyBhbmQgYnJpbmdzIHRoZSBkcmFmdCBpbiBsaW5l IHdpdGggcmVjZW50IGNoYW5nZXMgaW4gM0dQUCB0aGF0IG9jY3VycmVkIHdoaWxlIG91ciBsYXN0 IGRyYWZ0IHdhcyBzdWJtaXR0ZWQuDQoNCkNoZWVycywNCkplZmYNCg0KDQoNCg0KDQoNCg0KT24g 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Zi5vcmcvbWFpbG1hbi9saXN0aW5mby9zZmMNCg== From nobody Wed Oct 14 13:35:10 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A4DBA1A86F2 for ; Wed, 14 Oct 2015 13:35:08 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.51 X-Spam-Level: X-Spam-Status: No, score=-14.51 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id V7URdpBzz7pV for ; Wed, 14 Oct 2015 13:35:07 -0700 (PDT) Received: from alln-iport-2.cisco.com (alln-iport-2.cisco.com [173.37.142.89]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate 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RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RiCpq5IJxhio; Wed, 14 Oct 2015 23:25:36 -0700 (PDT) Received: from SNT004-OMC4S30.hotmail.com (snt004-omc4s30.hotmail.com [65.55.90.233]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EAF4B1B30DD; Wed, 14 Oct 2015 23:25:35 -0700 (PDT) Received: from SNT146-DS6 ([65.55.90.199]) by SNT004-OMC4S30.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.23008); Wed, 14 Oct 2015 23:25:35 -0700 X-TMN: [cxICgsqtCZ+m6VXMiMHzijLdj2z8QU00hwutCcHslqE=] X-Originating-Email: [fuqiao1@outlook.com] Message-ID: From: Fu Qiao To: References: In-Reply-To: Date: Thu, 15 Oct 2015 14:25:34 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00F2_01D10755.5AE581A0" X-Mailer: Microsoft Office Outlook 12.0 thread-index: AdEG+uvpOFzRnXfFThGmGbXzhwd9OgAFQmZg Content-Language: zh-cn X-OriginalArrivalTime: 15 Oct 2015 06:25:35.0460 (UTC) FILETIME=[4D16CA40:01D10712] Archived-At: Cc: sfc@ietf.org, 'sfc' Subject: [sfc] =?gb2312?b?tPC4tDogIDogTmV3IFZlcnNpb24gTm90aWZpY2F0aW9uIGZv?= =?gb2312?b?cglkcmFmdC1mdS1zZmMtdG9wb2xvZ3ktMDEudHh0?= X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Oct 2015 06:25:42 -0000 ------=_NextPart_000_00F2_01D10755.5AE581A0 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: quoted-printable Hi, Cui. Thank you for the comments. Please see the inlines and see if = it explains your questions. =20 =B7=A2=BC=FE=C8=CB: sfc [mailto:sfc-bounces@ietf.org] =B4=FA=B1=ED = wang.cui1@zte.com.cn =B7=A2=CB=CD=CA=B1=BC=E4: 2015=C4=EA10=D4=C215=C8=D5 11:38 =CA=D5=BC=FE=C8=CB: Fu Qiao =B3=AD=CB=CD: sfc; sfc@ietf.org =D6=F7=CC=E2: Re: [sfc] : New Version Notification for = draft-fu-sfc-topology-01.txt =20 Hi Qiao,=20 Thanks for your updating.=20 In the last sentence of Paragraph 2 in section 2, it mentions Multiple SFFs can be deployed after the GW in large scale use cases, so as to = avoid large volume of traffic returning to the GW continuously. You mean = multiple GWs or multiple SFFs? I am not very clear how to avoid large traffic.=20 [fq] Actually I think the SFFs are logical instance. They could be GWs = in real deployment. But these GWs are acting as SFFs in the SFC sense. =20 And the next-to-the-last paragraph in section 5 mentions when = finishing the SFP, the GW will remove the SFC header.... This means the GW is the = last SFF where the last SF attached in the SFP? But commonly, the GW isn't = the last SFF, except there are some additional requirements between the = actually last SFF and the GW.=20 [fq] For this part, I think the SFFs after the GW are actually in the = SFC region. The packets within this region is forwarded according to their = SFC header rather than using its original destination address, that is to = say it is an overlay network. Packets taken off that header will have its = original destination address revealed and should be forwarded to the destination, which maybe an enterprise branch, for example. In the real deployment in = the operators network, we actually only have one GW for the packets to get = in and out of such region. That=A1=AFs why I say it should be the GW to = take off the SFC header rather than the last SFF.=20 As for the details description in section 6, the traditional CPEs in = the MPLS-TP network still do what they do now, configuring the configuration lines and encapsulating the packets with MPLS labels. The difference is = that the traditional CPEs forward the packets to the GW to apply SFC, rather = than forwarding along the MPLS Path. Right?=20 [fq] What we are expecting here, is the traditional CPE should build a = MPLS tunnel to the destination, but such tunnel will certainly pass the = MPLS-GW. The GW should be enhanced to apply the SFC. And then the traffic can get back to the tunnel and get to the destination. We are trying to avoid complicating the function in the traditional CPE, therefore in this deployment, no update should be done on the traditional devices. But we = will have to upgrade the GW to support this. =20 Thanks,=20 Best Wishes,=20 Linda Wang=20 "sfc" =D0=B4=D3=DA 2015/10/14 16:57:05: > Fu Qiao =20 > =B7=A2=BC=FE=C8=CB: "sfc" >=20 > 2015/10/14 16:57=20 >=20 > =CA=D5=BC=FE=C8=CB=20 >=20 > ,=20 >=20 > =B3=AD=CB=CD=20 >=20 > =D6=F7=CC=E2=20 >=20 > [sfc] =D7=AA=B7=A2: New Version Notification for = draft-fu-sfc-topology-01.txt=20 >=20 > Hi, all. I have upload a new version of the SFC topology draft. This > draft mainly discusses the deployment topology of SFC in the=20 > operators' network. Comparing with the SFC architecture, this draft=20 > tries to explain the deployment details of SFC in the operator = networks. > Your comments are more than welcome:) >=20 > -----=D3=CA=BC=FE=D4=AD=BC=FE----- > =B7=A2=BC=FE=C8=CB: internet-drafts@ietf.org [ = mailto:internet-drafts@ietf.org]=20 > =B7=A2=CB=CD=CA=B1=BC=E4: 2015=C4=EA10=D4=C214=C8=D5 16:33 > =CA=D5=BC=FE=C8=CB: Qiao Fu; Hui Deng; Joel. Halpern; Joel M. Halpern > =D6=F7=CC=E2: New Version Notification for = draft-fu-sfc-topology-01.txt >=20 >=20 > A new version of I-D, draft-fu-sfc-topology-01.txt > has been successfully submitted by Qiao Fu and posted to the > IETF repository. >=20 > Name: draft-fu-sfc-topology > Revision: 01 > Title: The topology of service function chaining > Document date: 2015-10-14 > Group: Individual Submission > Pages: 10 > URL: https://www.ietf.org/internet-drafts/draft-fu-sfc- > topology-01.txt > Status: = https://datatracker.ietf.org/doc/draft-fu-sfc-topology/ > Htmlized: = https://tools.ietf.org/html/draft-fu-sfc-topology-01 > Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-fu-sfc-topology-01 >=20 > Abstract: > This document proposes a deployment topology of Service Function > Chaining(SFC). The topology is in accordance with the SFC > architecture in [I-D.ietf-sfc-architecture]. Currently, such > architecture only includes architectural concepts, principles, and > components used in the construction of composite services through > deployment of SFCs, without any instruction for the field = deployment. > It is still difficult to map from the architecture to a real > deployment of SFC. In this document, we propose this topology = which > will give instructions for the field deployments. We further = propose > a VCPE usecase of SFC in the transport network, which explains the > details of the deployment topology. >=20 > >=20 >=20 > Please note that it may take a couple of minutes from the time of submission > until the htmlized version and diff are available at tools.ietf.org. >=20 > The IETF Secretariat >=20 >=20 > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc ------=_NextPart_000_00F2_01D10755.5AE581A0 Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: quoted-printable

Hi, Cui. Thank you for the comments. Please see the inlines and see = if it explains your questions.

 

=B7=A2=BC=FE=C8=CB: sfc [mailto:sfc-bounces@ietf.org] = =B4=FA=B1=ED wang.cui1@zte.com.cn
=B7=A2=CB=CD=CA=B1=BC=E4: 2015=C4=EA10=D4=C215=C8=D5 = 11:38
=CA=D5=BC=FE=C8=CB: Fu = Qiao
=B3=AD=CB=CD: sfc; sfc@ietf.org
=D6=F7=CC=E2: Re: [sfc] : New Version = Notification for = draft-fu-sfc-topology-01.txt

 

Hi = Qiao,

  = Thanks for your updating.

  In = the last sentence of Paragraph 2 in section 2, it mentions Multiple SFFs = can be deployed after the GW in large scale use cases, so as to avoid = large volume of traffic returning to the GW continuously. You mean = multiple GWs or multiple SFFs? I am not very clear how to avoid large = traffic.

[fq] Actually I think the SFFs are logical instance. They could be = GWs in real deployment. But these GWs are acting as SFFs in the SFC = sense.


  =  
  And = the next-to-the-last paragraph in section 5 mentions when finishing the = SFP, the GW will remove the SFC header.... This means the GW is the last = SFF where the last SF attached in the SFP? But commonly, the GW isn't = the last SFF, except there are some additional requirements between the = actually last SFF and the GW.

[fq] For this part, I think the SFFs after the GW are actually in the = SFC region. The packets within this region is forwarded according to = their SFC header rather than using its original destination address, = that is to say it is an overlay network. Packets taken off that header = will have its original destination address revealed and should be = forwarded to the destination, which maybe an enterprise branch, for = example. In the real deployment in the operators network, we actually = only have one GW for the packets to get in and out of such region. = That=A1=AFs why I say it should be the GW to take off the SFC header = rather than the last SFF.



  As = for the details description in section 6, the traditional CPEs in the = MPLS-TP network still do what they do now, configuring the configuration = lines and encapsulating the packets with MPLS labels. The difference is = that the traditional CPEs forward the packets to the GW to apply SFC, = rather than forwarding along the MPLS Path. Right?

[fq] What we are expecting here, is the traditional CPE should build = a MPLS tunnel to the destination, but such tunnel will certainly pass = the MPLS-GW. The GW should be enhanced to apply the SFC. And then the = traffic can get back to the tunnel and get to the destination. We are = trying to avoid complicating the function in the traditional CPE, = therefore in this deployment, no update should be done on the = traditional devices. But we will have to upgrade the GW to support = this.

 =

  = Thanks,

Best = Wishes,
Linda = Wang


"sfc" <sfc-bounces@ietf.org> = =D0=B4=D3=DA 2015/10/14 16:57:05:

> Fu Qiao = <fuqiao1@outlook.com>
> =B7=A2=BC=FE=C8=CB: =  "sfc" = <sfc-bounces@ietf.org>
>
> 2015/10/14 16:57
>
> =CA=D5=BC=FE=C8=CB
>
> <sfc@ietf.org>, =
>
> =B3=AD=CB=CD =
> =
> = =D6=F7=CC=E2
>
> [sfc] =D7=AA=B7=A2: New Version = Notification for draft-fu-sfc-topology-01.txt
>
> Hi, all. I have upload a new = version of the SFC topology draft. This
> draft mainly = discusses the deployment topology of SFC in the
> = operators' network. Comparing with the SFC architecture, this draft =
> tries to explain the deployment details of SFC in the = operator networks.
> Your comments are more than = welcome:)
>
> -----=D3=CA=BC=FE=D4=AD=BC=FE-----
> =B7=A2=BC=FE=C8=CB: = internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] =
> = =B7=A2=CB=CD=CA=B1=BC=E4: = 2015=C4=EA10=D4=C214=C8=D5 = 16:33
> =CA=D5=BC=FE=C8=CB: Qiao = Fu; Hui Deng; Joel. Halpern; Joel M. Halpern
> = =D6=F7=CC=E2: New Version Notification for = draft-fu-sfc-topology-01.txt
>
> =
> A new version of I-D, = draft-fu-sfc-topology-01.txt
> has been successfully = submitted by Qiao Fu and posted to the
> IETF = repository.
>
> Name:     =  draft-fu-sfc-topology
> Revision:   = 01
> Title:      The topology of service = function chaining
> Document date:   = 2015-10-14
> Group:      Individual = Submission
> Pages:     =  10
> URL:           =  https://www.ietf.org/internet-drafts/draft-fu-= sfc-
> topology-01.txt
> = Status:         https://datatracker.ietf.org/doc/draft-fu-sfc-= topology/
> Htmlized:       = https://tools.ietf.org/html/draft-fu-sfc-topol= ogy-01
> Diff:       =     https://www.ietf.org/rfcdiff?url2=3Ddraft-fu-s= fc-topology-01
>
> = Abstract:
>    This document proposes a = deployment topology of Service Function
>   =  Chaining(SFC).  The topology is in accordance with the = SFC
>    architecture in = [I-D.ietf-sfc-architecture].  Currently, such
> =    architecture only includes architectural concepts, = principles, and
>    components used in the = construction of composite services through
>   =  deployment of SFCs, without any instruction for the field = deployment.
>    It is still difficult to map = from the architecture to a real
>    deployment = of SFC.  In this document, we propose this topology = which
>    will give instructions for the field = deployments.  We further propose
>    a = VCPE usecase of SFC in the transport network, which explains = the
>    details of the deployment = topology.
>
>         =                     =                     =                     =          
>
> =
> Please note that it may take a couple of minutes from = the time of submission
> until the htmlized version and = diff are available at tools.ietf.org.
>
> = The IETF Secretariat
>
> =
> = _______________________________________________
> sfc = mailing list
> sfc@ietf.org
> = https://www.ietf.org/mailman/listinfo/sfc

------=_NextPart_000_00F2_01D10755.5AE581A0-- From nobody Thu Oct 15 00:55:36 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 55FF31A87D1 for ; Thu, 15 Oct 2015 00:55:35 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.103 X-Spam-Level: X-Spam-Status: No, score=-0.103 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HELO_EQ_JP=1.244, HOST_EQ_JP=1.265, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id nWDVqp0beKjd for ; Thu, 15 Oct 2015 00:55:33 -0700 (PDT) Received: from tama500.ecl.ntt.co.jp (tama500.ecl.ntt.co.jp [129.60.39.148]) by ietfa.amsl.com (Postfix) with ESMTP id 2E9511A87B2 for ; Thu, 15 Oct 2015 00:55:33 -0700 (PDT) Received: from vc1.ecl.ntt.co.jp (vc1.ecl.ntt.co.jp [129.60.86.153]) by tama500.ecl.ntt.co.jp (8.13.8/8.13.8) with ESMTP id t9F7tWYB013667 for ; Thu, 15 Oct 2015 16:55:32 +0900 Received: from vc1.ecl.ntt.co.jp (localhost [127.0.0.1]) by vc1.ecl.ntt.co.jp (Postfix) with ESMTP id 892B95F623 for ; Thu, 15 Oct 2015 16:55:32 +0900 (JST) Received: from imail3.m.ecl.ntt.co.jp (imail3.m.ecl.ntt.co.jp [129.60.5.248]) by vc1.ecl.ntt.co.jp (Postfix) with ESMTP id 7B7F35F612 for ; Thu, 15 Oct 2015 16:55:32 +0900 (JST) Received: from [IPv6:::1] ([129.60.13.28]) by imail3.m.ecl.ntt.co.jp (8.13.8/8.13.8) with ESMTP id t9F7tI7O027996 for ; Thu, 15 Oct 2015 16:55:32 +0900 References: <20151010015929.14108.56028.idtracker@ietfa.amsl.com> From: Shunsuke Homma X-Forwarded-Message-Id: <20151010015929.14108.56028.idtracker@ietfa.amsl.com> Message-ID: <561F5BFB.7030404@lab.ntt.co.jp> Date: Thu, 15 Oct 2015 16:55:39 +0900 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: <20151010015929.14108.56028.idtracker@ietfa.amsl.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit To: sfc@ietf.org X-TM-AS-MML: disable Archived-At: Subject: [sfc] Fwd: New Version Notification for draft-homma-sfc-forwarding-methods-analysis-04.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Oct 2015 07:55:35 -0000 Hi, We updated "draft-homma-sfc-forwarding-methods-analysis." We received a suggestion about a new method which inserts SPIs/SIs into IPv6 extension headers, and added the analysis on the method. https://datatracker.ietf.org/doc/draft-homma-sfc-forwarding-methods-analysis/ If you have any questions or comments, please let us know. IMHO, SFC, or forwarding with NSH, is not the only approach to provide service oriented packet forwarding. Actually, there are several forwarding methods without NSH, and there are some people who think additional header is not mandatory. Therefore, I think that this draft is useful for showing the advantages of SFC compared with other methods, as informational. I would like to know WG's opinion about this draft. Please comment if you think this draft is worse discussing as a WG draft? Thanks, Shunsuke -------- Forwarded Message -------- Subject: New Version Notification for draft-homma-sfc-forwarding-methods-analysis-04.txt Date: Fri, 09 Oct 2015 18:59:29 -0700 From: internet-drafts@ietf.org To: Alexey Gorbunov , Kengo , Shunsuke Homma , Nicolai Leymann , Kengo Naito , Diego Lopez , Diego R. Lopez , David Dolson A new version of I-D, draft-homma-sfc-forwarding-methods-analysis-04.txt has been successfully submitted by Shunsuke Homma and posted to the IETF repository. Name: draft-homma-sfc-forwarding-methods-analysis Revision: 04 Title: Analysis on Forwarding Methods for Service Chaining Document date: 2015-10-09 Group: Individual Submission Pages: 34 URL: https://www.ietf.org/internet-drafts/draft-homma-sfc-forwarding-methods-analysis-04.txt Status: https://datatracker.ietf.org/doc/draft-homma-sfc-forwarding-methods-analysis/ Htmlized: https://tools.ietf.org/html/draft-homma-sfc-forwarding-methods-analysis-04 Diff: https://www.ietf.org/rfcdiff?url2=draft-homma-sfc-forwarding-methods-analysis-04 Abstract: This document presents the results of analyzing packet forwarding methods and path selection patterns for achieving Service Chaining. In Service Chaining, data packets need to be forwarded to the appropriate service functions deployed in networks based on service provided for the packets, and distribution of the service-oriented route information and steering data packets following the route information would be required. Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org. The IETF Secretariat From nobody Thu Oct 15 01:20:57 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6B5B11A8FD3; Thu, 15 Oct 2015 01:20:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -100.44 X-Spam-Level: X-Spam-Status: No, score=-100.44 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, CN_BODY_35=0.339, HTML_FONT_FACE_BAD=0.981, HTML_MESSAGE=0.001, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UyqqeJs6uhRO; Thu, 15 Oct 2015 01:20:49 -0700 (PDT) Received: from mx5.zte.com.cn (mx5.zte.com.cn [63.217.80.70]) by ietfa.amsl.com (Postfix) with ESMTP id 8C7F31A8F49; Thu, 15 Oct 2015 01:20:49 -0700 (PDT) Received: 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required=5 tests=[BAYES_00=-1.9, CHARSET_FARAWAY_HEADER=3.2, CN_BODY_35=0.339, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, MIME_8BIT_HEADER=0.3, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6CkY6pt-k9rN; Thu, 15 Oct 2015 01:51:24 -0700 (PDT) Received: from SNT004-OMC4S12.hotmail.com (snt004-omc4s12.hotmail.com [65.55.90.215]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 846531A9118; Thu, 15 Oct 2015 01:51:23 -0700 (PDT) Received: from SNT146-DS10 ([65.55.90.199]) by SNT004-OMC4S12.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.23008); Thu, 15 Oct 2015 01:51:22 -0700 X-TMN: [QW+jsvT3/327RS7iVrbHfMreru5sykH+TNTgAQGrwN0=] X-Originating-Email: [fuqiao1@outlook.com] Message-ID: From: Fu Qiao To: References: In-Reply-To: Date: Thu, 15 Oct 2015 16:51:21 +0800 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0150_01D10769.B8C31C10" X-Mailer: Microsoft Office Outlook 12.0 thread-index: AdEHIms+c1Gpr2sJQt2Ce7RSoH0dLgAA3mrw Content-Language: zh-cn X-OriginalArrivalTime: 15 Oct 2015 08:51:22.0744 (UTC) FILETIME=[AAE06780:01D10726] Archived-At: Cc: sfc@ietf.org, 'sfc' Subject: [sfc] =?gb2312?b?tPC4tDogIDogTmV3IFZlcnNpb24gTm90aWZpY2F0aW9uIGZv?= =?gb2312?b?cglkcmFmdC1mdS1zZmMtdG9wb2xvZ3ktMDEudHh0?= X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Oct 2015 08:51:30 -0000 ------=_NextPart_000_0150_01D10769.B8C31C10 Content-Type: text/plain; charset="gb2312" Content-Transfer-Encoding: quoted-printable Hi, Cui. Yes, indeed. That=A1=AFs why I propose this draft. Currently the SFC architecture is a logical architecture. When it comes to real = deployments, there will be some additional requirements for these logical modules in = the SFC architecture. I would like to specify these additional requirements through discussion of real deployments in this draft. =20 =B7=A2=BC=FE=C8=CB: sfc [mailto:sfc-bounces@ietf.org] =B4=FA=B1=ED = wang.cui1@zte.com.cn =B7=A2=CB=CD=CA=B1=BC=E4: 2015=C4=EA10=D4=C215=C8=D5 16:20 =CA=D5=BC=FE=C8=CB: Fu Qiao =B3=AD=CB=CD: 'sfc'; sfc@ietf.org =D6=F7=CC=E2: Re: [sfc] : New Version Notification for = draft-fu-sfc-topology-01.txt =20 Hi Qiao,=20 Thanks for your explanation.=20 In fact, according to SFC architecture, the last SFF is responsible for removing the SFC header and delivering the packet back to the original network. However, here you try to let GW to do the decapsulation. This = is the conflict. So I mention there may be some additional requirements = between the last SFF and the GW.=20 Thanks,=20 Best Regards,=20 Linda Wang=20 =20 =20 Hi, Cui. Thank you for the comments. Please see the inlines and see if = it explains your questions.=20 =20 =B7=A2=BC=FE=C8=CB: sfc [ = mailto:sfc-bounces@ietf.org] =B4=FA =B1=ED wang.cui1@zte.com.cn =B7=A2=CB=CD=CA=B1=BC=E4: 2015=C4=EA10=D4=C215=C8=D5 11:38 =CA=D5=BC=FE=C8=CB: Fu Qiao =B3=AD=CB=CD: sfc; sfc@ietf.org =D6=F7=CC=E2: Re: [sfc] : New Version Notification for = draft-fu-sfc-topology-01.txt=20 =20 Hi Qiao,=20 Thanks for your updating.=20 In the last sentence of Paragraph 2 in section 2, it mentions Multiple = SFFs can be deployed after the GW in large scale use cases, so as to avoid = large volume of traffic returning to the GW continuously. You mean multiple = GWs or multiple SFFs? I am not very clear how to avoid large traffic.=20 [fq] Actually I think the SFFs are logical instance. They could be GWs = in real deployment. But these GWs are acting as SFFs in the SFC sense.=20 =20 And the next-to-the-last paragraph in section 5 mentions when finishing = the SFP, the GW will remove the SFC header.... This means the GW is the last = SFF where the last SF attached in the SFP? But commonly, the GW isn't the = last SFF, except there are some additional requirements between the actually = last SFF and the GW.=20 [fq] For this part, I think the SFFs after the GW are actually in the = SFC region. The packets within this region is forwarded according to their = SFC header rather than using its original destination address, that is to = say it is an overlay network. Packets taken off that header will have its = original destination address revealed and should be forwarded to the destination, which maybe an enterprise branch, for example. In the real deployment in = the operators network, we actually only have one GW for the packets to get = in and out of such region. That=A1=AFs why I say it should be the GW to = take off the SFC header rather than the last SFF.=20 As for the details description in section 6, the traditional CPEs in = the MPLS-TP network still do what they do now, configuring the configuration lines and encapsulating the packets with MPLS labels. The difference is = that the traditional CPEs forward the packets to the GW to apply SFC, rather = than forwarding along the MPLS Path. Right?=20 [fq] What we are expecting here, is the traditional CPE should build a = MPLS tunnel to the destination, but such tunnel will certainly pass the = MPLS-GW. The GW should be enhanced to apply the SFC. And then the traffic can get back to the tunnel and get to the destination. We are trying to avoid complicating the function in the traditional CPE, therefore in this deployment, no update should be done on the traditional devices. But we = will have to upgrade the GW to support this.=20 =20 Thanks,=20 Best Wishes,=20 Linda Wang=20 "sfc" =D0=B4=D3=DA 2015/10/14 16:57:05: > Fu Qiao =20 > =B7=A2=BC=FE=C8=CB: "sfc" >=20 > 2015/10/14 16:57=20 >=20 > =CA=D5=BC=FE=C8=CB=20 >=20 > ,=20 >=20 > =B3=AD=CB=CD=20 >=20 > =D6=F7=CC=E2=20 >=20 > [sfc] =D7=AA=B7=A2: New Version Notification for = draft-fu-sfc-topology-01.txt=20 >=20 > Hi, all. I have upload a new version of the SFC topology draft. This > draft mainly discusses the deployment topology of SFC in the=20 > operators' network. Comparing with the SFC architecture, this draft=20 > tries to explain the deployment details of SFC in the operator = networks. > Your comments are more than welcome:) >=20 > -----=D3=CA=BC=FE=D4=AD=BC=FE----- > =B7=A2=BC=FE=C8=CB: internet-drafts@ietf.org [ = mailto:internet-drafts@ietf.org]=20 > =B7=A2=CB=CD=CA=B1=BC=E4: 2015=C4=EA10=D4=C214=C8=D5 16:33 > =CA=D5=BC=FE=C8=CB: Qiao Fu; Hui Deng; Joel. Halpern; Joel M. Halpern > =D6=F7=CC=E2: New Version Notification for = draft-fu-sfc-topology-01.txt >=20 >=20 > A new version of I-D, draft-fu-sfc-topology-01.txt > has been successfully submitted by Qiao Fu and posted to the > IETF repository. >=20 > Name: draft-fu-sfc-topology > Revision: 01 > Title: The topology of service function chaining > Document date: 2015-10-14 > Group: Individual Submission > Pages: 10 > URL: https://www.ietf.org/internet-drafts/draft-fu-sfc- > topology-01.txt > Status: = https://datatracker.ietf.org/doc/draft-fu-sfc-topology/ > Htmlized: = https://tools.ietf.org/html/draft-fu-sfc-topology-01 > Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-fu-sfc-topology-01 >=20 > Abstract: > This document proposes a deployment topology of Service Function > Chaining(SFC). The topology is in accordance with the SFC > architecture in [I-D.ietf-sfc-architecture]. Currently, such > architecture only includes architectural concepts, principles, and > components used in the construction of composite services through > deployment of SFCs, without any instruction for the field = deployment. > It is still difficult to map from the architecture to a real > deployment of SFC. In this document, we propose this topology = which > will give instructions for the field deployments. We further = propose > a VCPE usecase of SFC in the transport network, which explains the > details of the deployment topology. >=20 > >=20 >=20 > Please note that it may take a couple of minutes from the time of submission > until the htmlized version and diff are available at tools.ietf.org. >=20 > The IETF Secretariat >=20 >=20 > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc=20 ------=_NextPart_000_0150_01D10769.B8C31C10 Content-Type: text/html; charset="gb2312" Content-Transfer-Encoding: quoted-printable

Hi, Cui.

Yes, indeed. That=A1=AFs why I propose this draft. Currently the SFC = architecture is a logical architecture. When it comes to real = deployments, there will be some additional requirements for these = logical modules in the SFC architecture. I would like to specify these = additional requirements through discussion of real deployments in this = draft.

 

=B7=A2=BC=FE=C8=CB: sfc [mailto:sfc-bounces@ietf.org] = =B4=FA=B1=ED wang.cui1@zte.com.cn
=B7=A2=CB=CD=CA=B1=BC=E4: 2015=C4=EA10=D4=C215=C8=D5 = 16:20
=CA=D5=BC=FE=C8=CB: Fu = Qiao
=B3=AD=CB=CD: 'sfc'; sfc@ietf.org
=D6=F7=CC=E2: Re: [sfc] : New Version = Notification for = draft-fu-sfc-topology-01.txt

 

Hi = Qiao,

 Thanks = for your explanation.
 In = fact, according to SFC architecture, the last SFF is responsible for = removing the SFC header and delivering the packet back to the original = network. However, here you try to let GW to do  the decapsulation. = This is the conflict. So I mention there may be some additional = requirements between the last SFF and the GW. =

 Thanks,=

Best = Regards,
Linda = Wang
 =
  =  





Hi, Cui. Thank you for the comments. Please see the inlines and see = if it explains your questions. =
 
=B7=A2=BC=FE=C8=CB: sfc [mailto:sfc-bounces@ietf.org<= span lang=3DEN-US style=3D'font-size:10.0pt'>] =B4=FA=B1=ED wang.cui1@zte.com.cn
=B7=A2=CB=CD=CA=B1=BC=E4: 2015=C4=EA10=D4=C215=C8=D5 = 11:38
=CA=D5=BC=FE=C8=CB: Fu = Qiao
=B3=AD=CB=CD: sfc; = sfc@ietf.org
=D6=F7=CC=E2: Re: [sfc] : New Version = Notification for draft-fu-sfc-topology-01.txt
 
Hi = Qiao,

 Tha= nks for your updating.

 In = the last sentence of Paragraph 2 in section 2, it mentions Multiple SFFs = can be deployed after the GW in large scale use cases, so as to avoid = large volume of traffic returning to the GW continuously. You mean = multiple GWs or multiple SFFs? I am not very clear how to avoid large = traffic.
[fq] Actually I think the SFFs are logical instance. They could be = GWs in real deployment. But these GWs are acting as SFFs in the SFC = sense.

  =  
 And= the next-to-the-last paragraph in section 5 mentions when finishing the = SFP, the GW will remove the SFC header.... This means the GW is the last = SFF where the last SF attached in the SFP? But commonly, the GW isn't = the last SFF, except there are some additional requirements between the = actually last SFF and the GW.
[fq] For this part, I think the SFFs after the GW are actually in the = SFC region. The packets within this region is forwarded according to = their SFC header rather than using its original destination address, = that is to say it is an overlay network. Packets taken off that header = will have its original destination address revealed and should be = forwarded to the destination, which maybe an enterprise branch, for = example. In the real deployment in the operators network, we actually = only have one GW for the packets to get in and out of such region. = That=A1=AFs why I say it should be the GW to take off the SFC header = rather than the last SFF.


 As = for the details description in section 6, the traditional CPEs in the = MPLS-TP network still do what they do now, configuring the configuration = lines and encapsulating the packets with MPLS labels. The difference is = that the traditional CPEs forward the packets to the GW to apply SFC, = rather than forwarding along the MPLS Path. Right?
[fq] What we are expecting here, is the traditional CPE should build = a MPLS tunnel to the destination, but such tunnel will certainly pass = the MPLS-GW. The GW should be enhanced to apply the SFC. And then the = traffic can get back to the tunnel and get to the destination. We are = trying to avoid complicating the function in the traditional CPE, = therefore in this deployment, no update should be done on the = traditional devices. But we will have to upgrade the GW to support = this.
 =

 Tha= nks,

Best = Wishes,
Linda = Wang


"sfc" = <sfc-bounces@ietf.org> =D0=B4=D3=DA 2015/10/14 = 16:57:05:

> Fu Qiao <fuqiao1@outlook.com>
> = =B7=A2=BC=FE=C8=CB:  "sfc" = <sfc-bounces@ietf.org>
>
> 2015/10/14 = 16:57
>
> =CA=D5=BC=FE=C8=CB
>
> <sfc@ietf.org>, =
>
> =B3=AD=CB=CD
>
> =D6=F7=CC=E2
>
> [sfc] =D7=AA=B7=A2: New Version = Notification for draft-fu-sfc-topology-01.txt
>
> Hi, all. I have upload a = new version of the SFC topology draft. This
> draft mainly = discusses the deployment topology of SFC in the
> operators' = network. Comparing with the SFC architecture, this draft
> tries = to explain the deployment details of SFC in the operator = networks.
> Your comments are more than welcome:)
>
> = -----=D3=CA=BC=FE=D4=AD=BC=FE-----
> =B7=A2=BC=FE=C8=CB: = internet-drafts@ietf.org [mailto:internet-drafts@ietf.org]
> =B7=A2=CB=CD=CA=B1=BC=E4: = 2015=C4=EA10=D4=C214=C8=D5 16:33
> = =CA=D5=BC=FE=C8=CB: Qiao Fu; Hui Deng; Joel. = Halpern; Joel M. Halpern
> =D6=F7=CC=E2: = New Version Notification for draft-fu-sfc-topology-01.txt
> =
>
> A new version of I-D, = draft-fu-sfc-topology-01.txt
> has been successfully submitted by = Qiao Fu and posted to the
> IETF repository.
>
> = Name:      draft-fu-sfc-topology
> Revision:   = 01
> Title:      The topology of service function = chaining
> Document date:   2015-10-14
> Group:   =    Individual Submission
> Pages:     =  10
> URL:           =  https://www.ietf.org/internet-drafts/draft-fu-= sfc-
> topology-01.txt
> Status: =         https://datatracker.ietf.org/doc/draft-fu-sfc-= topology/
> Htmlized:       = https://tools.ietf.org/html/draft-fu-sfc-topol= ogy-01
> Diff:         =   https://www.ietf.org/rfcdiff?url2=3Ddraft-fu-s= fc-topology-01
>
> Abstract:
>   =  This document proposes a deployment topology of Service = Function
>    Chaining(SFC).  The topology is in = accordance with the SFC
>    architecture in = [I-D.ietf-sfc-architecture].  Currently, such
>   =  architecture only includes architectural concepts, principles, = and
>    components used in the construction of = composite services through
>    deployment of SFCs, = without any instruction for the field deployment.
>   =  It is still difficult to map from the architecture to a = real
>    deployment of SFC.  In this document, we = propose this topology which
>    will give instructions = for the field deployments.  We further propose
>   =  a VCPE usecase of SFC in the transport network, which explains = the
>    details of the deployment topology.
> =
>                   =                     =                     =                   =  
>
>
> Please note that it may take a couple = of minutes from the time of submission
> until the htmlized = version and diff are available at tools.ietf.org.
>
> The = IETF Secretariat
>
>
> = _______________________________________________
> sfc mailing = list
> sfc@ietf.org
> https://www.ietf.org/mailman/listinfo/sfc

------=_NextPart_000_0150_01D10769.B8C31C10-- From nobody Thu Oct 15 02:24:51 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C014A1A9135; Thu, 15 Oct 2015 02:24:50 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -100.44 X-Spam-Level: X-Spam-Status: No, score=-100.44 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, CN_BODY_35=0.339, HTML_FONT_FACE_BAD=0.981, HTML_MESSAGE=0.001, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id e73pZe17PJgl; Thu, 15 Oct 2015 02:24:46 -0700 (PDT) Received: from mx5.zte.com.cn (mx5.zte.com.cn [63.217.80.70]) by ietfa.amsl.com (Postfix) with ESMTP id A76E01A9252; Thu, 15 Oct 2015 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with ESMTP/TLS/DHE-RSA-AES128-SHA; 15 Oct 2015 17:31:04 +0200 X-IronPort-AV: E=Sophos;i="5.17,686,1437429600"; d="scan'208";a="933108285" Received: from he113470.emea1.cds.t-internal.com ([10.134.93.128]) by q4de8psazkj.blf.telekom.de with ESMTP/TLS/AES128-SHA; 15 Oct 2015 17:31:03 +0200 Received: from HE113484.emea1.cds.t-internal.com ([10.134.93.124]) by HE113470.emea1.cds.t-internal.com ([::1]) with mapi; Thu, 15 Oct 2015 17:31:03 +0200 From: To: , , , Date: Thu, 15 Oct 2015 17:31:02 +0200 Thread-Topic: New Non-WG Mailing List: 5gangip -- Discussion of implications of the upcoming 5th Generation (fixed and) Mobile communication systems on IP protocols. Thread-Index: AdECBTbQi+qo3zVYQF6TNeiiAi7GsQFWD1Vw Message-ID: <05C81A773E48DD49B181B04BA21A342A33B15F804F@HE113484.emea1.cds.t-internal.com> References: <20151008200914.12173.16905.idtracker@ietfa.amsl.com> In-Reply-To: <20151008200914.12173.16905.idtracker@ietfa.amsl.com> Accept-Language: de-DE Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: de-DE Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: [sfc] FW: New Non-WG Mailing List: 5gangip -- Discussion of implications of the upcoming 5th Generation (fixed and) Mobile communication systems on IP protocols. X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 15 Oct 2015 15:31:11 -0000 RGVhciBhbGwsDQoNCldpdGggcmVzcGVjdCB0byBjcm9zcyBXRy9SRyBkaXNjdXNzaW9uIG9mIHBy b3RvY29sIGlzc3VlcyByZWdhcmRpbmcgY2hhbGxlbmdlcyBhbmQgaW1wYWN0IG9mIHVwY29taW5n IDVHIHRvcGljcyB3ZSB0aG91Z2h0IGl0IG1pZ2h0IGJlIGZydWl0ZnVsIHRvIHVzZSB0aGlzIG5l dyBNTC4NCkZvciBkZXRhaWxzIHBsZWFzZSBzZWUgYmVsb3cgLi4uDQoNClBsZWFzZSBleGN1c2Ug Zm9yICdzcGFtbWluZycgaW4gY2FzZSB5b3UgYWxyZWFkeSBzdWJzY3JpYmVkIG9yIGNvbnNpZGVy ZWQgc3Vic2NyaXB0aW9uIDstKQ0KLSBBbmQgZmVlbCBmcmVlIHRvIGZvcndhcmQgYWxzbyB0byBv dGhlciBsaXN0cyBub3QgaW5jbHVkZWQuDQogDQpPZiBjb3Vyc2UgYWxzbyBjb250cmFyeSBvcGlu aW9ucyBhcmUgbW9yZSB0aGFuIHdlbGNvbWUhDQoNClRoYW5rcyBhbmQgDQpCZXN0IFJlZ2FyZHMN Cg0KQmVoY2V0IGFuZCBEaXJrIA0KDQotLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KRnJvbTog SUVURiBTZWNyZXRhcmlhdCBbbWFpbHRvOmlldGYtc2VjcmV0YXJpYXRAaWV0Zi5vcmddIA0KU2Vu dDogRG9ubmVyc3RhZywgOC4gT2t0b2JlciAyMDE1IDIyOjA5DQpUbzogSUVURiBBbm5vdW5jZW1l bnQgTGlzdA0KQ2M6IDVnYW5naXBAaWV0Zi5vcmc7IHZvbiBIdWdvLCBEaXJrOyBzYXJpa2F5YUBp ZWVlLm9yZw0KU3ViamVjdDogTmV3IE5vbi1XRyBNYWlsaW5nIExpc3Q6IDVnYW5naXAgLS0gRGlz Y3Vzc2lvbiBvZiBpbXBsaWNhdGlvbnMgb2YgdGhlIHVwY29taW5nIDV0aCBHZW5lcmF0aW9uIChm aXhlZCBhbmQpIE1vYmlsZSBjb21tdW5pY2F0aW9uIHN5c3RlbXMgb24gSVAgcHJvdG9jb2xzLg0K DQpBIG5ldyBJRVRGIG5vbi13b3JraW5nIGdyb3VwIGVtYWlsIGxpc3QgaGFzIGJlZW4gY3JlYXRl ZC4NCg0KTGlzdCBhZGRyZXNzOiA1Z2FuZ2lwQGlldGYub3JnDQpBcmNoaXZlOiBodHRwczovL21h aWxhcmNoaXZlLmlldGYub3JnL2FyY2gvc2VhcmNoLz9lbWFpbF9saXN0PTVnYW5naXANClRvIHN1 YnNjcmliZTogaHR0cHM6Ly93d3cuaWV0Zi5vcmcvbWFpbG1hbi9saXN0aW5mby81Z2FuZ2lwDQoN ClB1cnBvc2U6DQoNCjVHIEFzcGVjdHMgb2YgTmV4dCBHZW5lcmF0aW9uIEludGVybmV0IFByb3Rv Y29scyANCg0KVGhpcyBsaXN0IGlzIGludGVuZGVkIGZvciBkaXNjdXNzaW9ucyByZWxhdGluZyB0 aGUgdXNlIG9mIEludGVybmV0IFByb3RvY29scywgZS5nLiBJUHY2LCBJUCBNdWx0aWNhc3QsIGV0 Yy4gaW4gNUcgbmV0d29ya3MuIEFzIHRoZSBmaWZ0aCBnZW5lcmF0aW9uIG1vYmlsZSB0ZWNobm9s b2d5ICg1RykgYmVnaW5zIHRvIGRyYXcgbW9yZSBhdHRlbnRpb24gaW4gYWxsIG1ham9yIHN0YW5k YXJkcyBkZXZlbG9wbWVudCBvcmdhbml6YXRpb25zIChTRE9zKSBhcyB3ZWxsIGFzIGluIElFVEYs IG1hbnkgYXJlIGludGVyZXN0ZWQgaW4gd29yayBhcm91bmQgNUcuIFR5cGljYWwgdXNlIGNhc2Vz IGFyZSBpbiA1MCsgTWJwcyBFdmVyeXdoZXJlLCBNYXNzaXZlIEludGVybmV0IG9mIFRoaW5ncyAo SW9UKSwgRXh0cmVtZSBSZWFsLVRpbWUgQ29tbXVuaWNhdGlvbnMsIExpZmVsaW5lIENvbW11bmlj YXRpb24sIFVsdHJhLXJlbGlhYmxlIENvbW11bmljYXRpb25zLCBCcm9hZGNhc3QtbGlrZSBTZXJ2 aWNlcy4gDQoNCk1ham9yIGRlc2lnbiBjcml0ZXJpYSBhcmUgdGVjaG5vbG9neSBpbmRlcGVuZGVu Y2UgYW5kIGEgbW9kdWxhciBpbnRlcm9wZXJhYmxlIGFwcHJvYWNoIHRvIGFsbG93IGZvciBmdWxs IHNlcnZpY2UgZmxleGliaWxpdHkuIFRoaXMgZ3JvdXAgaXMgZXhwZWN0ZWQgdG8gY29uY2VudHJh dGUgZXNwZWNpYWxseSBvbiA1RyBhc3BlY3RzIG9mIG5leHQgZ2VuZXJhdGlvbiBJbnRlcm5ldCBQ cm90b2NvbHMgKElQKSBpbmNsdWRpbmcgSVAgTXVsdGljYXN0LiBBcyBzdWNoLCB0aGUgd29yayBk b2VzIG5vdCBoYXZlIGEgY2xlYXJlciBzY29wZSB0aGFuIHRoaXMgeWV0LiA1R2FuZ2lwIGlzIGEg cGxhY2UgdG8gb3JnYW5pemUgdGhpcyBkaXNjdXNzaW9uLiANCg0KDQpGb3IgYWRkaXRpb25hbCBp bmZvcm1hdGlvbiwgcGxlYXNlIGNvbnRhY3QgdGhlIGxpc3QgYWRtaW5pc3RyYXRvcnMuDQo= From nobody Fri Oct 16 03:26:30 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 053DF1A6F9C for ; 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16 Oct 2015 12:19:21 +0200 Received: from HE113484.emea1.cds.t-internal.com ([10.134.93.124]) by HE113443.emea1.cds.t-internal.com ([::1]) with mapi; Fri, 16 Oct 2015 12:19:21 +0200 From: To: Date: Fri, 16 Oct 2015 12:19:19 +0200 Thread-Topic: [sfc] SFC WG agenda slots - Yokohama Thread-Index: AQHQ/2yEgKKh7mjWjUSUWGp1Wq1ho55ejfeAgAKs3wCACbJzkIADCEKg Message-ID: <05C81A773E48DD49B181B04BA21A342A33B16ABBC2@HE113484.emea1.cds.t-internal.com> References: <05C81A773E48DD49B181B04BA21A342A33B1465FC7@HE113484.emea1.cds.t-internal.com> <787AE7BB302AE849A7480A190F8B933008C7331A@OPEXCLILMA3.corporate.adroot.infra.ftgroup> In-Reply-To: <787AE7BB302AE849A7480A190F8B933008C7331A@OPEXCLILMA3.corporate.adroot.infra.ftgroup> Accept-Language: de-DE Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: de-DE Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: sarikaya@ieee.org, mohamed.boucadair@orange.com, sfc@ietf.org Subject: Re: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Oct 2015 10:26:30 -0000 SGkgSmltIGFuZCBUaG9tYXMsDQoNCldlIHdvdWxkIGxpa2UgdG8gYWRkIHRvIG91ciBzbG90IHJl cXVlc3QgYmVsb3cgdGhhdCBkcmFmdC1zYXJpa2F5YS1zZmMtaG9zdGlkLXNlcnZpY2VoZWFkZXIt MDAudHh0IA0KDQotIGNvbnRyaWJ1dGVzIHRvIGNoYXJ0ZXIgaXRlbXMgR2VuZXJpYyBTRkMgRW5j YXBzdWxhdGlvbiBhbmQgQ29udHJvbCBQbGFuZSBNZWNoYW5pc21zIGluIHByb3Bvc2luZyBob3cg dG8gY29udmV5IGNvbnRleHQgaW5mb3JtYXRpb24gZm9yIGV4ZW1wbGFyeSBzZXJ2aWNlcw0KDQot IGFkZHJlc3NlcyBhIHR5cGUgb2YgbWV0YSBkYXRhIHRvIGJlIHBvdGVudGlhbGx5IGluY2x1ZGVk IGluIE5TSCB3aGVyZSBpdCBjb3VsZCBwcm92aWRlIGFkZGl0aW9uYWwgdXNlZnVsIGNvbnNpZGVy YXRpb25zDQoNCi0gdGFja2xlcyBkaWZmZXJlbnQgdXNlIGNhc2VzIGZvciBmaXhlZC9tb2JpbGUg c2VydmljZXMgYW5kIHRodXMgbWF5IGFkZCB0byBvdGhlciB1c2UgY2FzZSBkcmFmdHMNCg0KQW5k IHRodXMgbWF5IGJlIGEgY2FuZGlkYXRlIGZvciBtZXJnaW5nIHNvIHRoYXQgb3ZlcmFsbCBXRyB3 b3JrIGNhcGFjaXR5IGFuZCBkb2N1bWVudHMgZG9uJ3QgZGl2ZXJnZSB0b28gbXVjaC4NCjstKQ0K DQpUaGFua3MhIA0KDQpCZXN0IFJlZ2FyZHMgb24gYmVoYWxmIG9mIGFsbCBjby1hdXRob3JzDQoN CkRpcmsgDQoNCj4gLS0tLS1PcmlnaW5hbCBNZXNzYWdlLS0tLS0NCj4gRnJvbTogQmVoY2V0IFNh cmlrYXlhIFttYWlsdG86c2FyaWtheWEyMDEyQGdtYWlsLmNvbV0NCj4gU2VudDogRGllbnN0YWcs IDYuIE9rdG9iZXIgMjAxNSAxODo1MQ0KPiBUbzogSmltIEd1aWNoYXJkIChqZ3VpY2hhcikNCj4g Q2M6IHNmY0BpZXRmLm9yZzsgTW9oYW1lZCBCb3VjYWRhaXI7IHZvbiBIdWdvLCBEaXJrDQo+IFN1 YmplY3Q6IFJlOiBbc2ZjXSBTRkMgV0cgYWdlbmRhIHNsb3RzIC0gWW9rb2hhbWENCj4gDQo+ICBI aSBKaW0gJiBUaG9tYXMsDQo+IA0KPiBDYW4gd2UgcGxlYXNlIGhhdmUgYSBzbG90IHRvIHByZXNl bnQgb3VyIGRyYWZ0IG9uIFNGQyBTZXJ2aWNlIEhlYWRlciANCj4gZm9yIEhvc3QgSWRlbnRpZmlj YXRpb24sIGRyYWZ0LXNhcmlrYXlhLXNmYy1ob3N0aWQtc2VydmljZWhlYWRlci0wMC50eHQ/DQo+ IA0KPiBSZWdhcmRzLA0KPiANCj4gQmVoY2V0DQo+IA0KPiANCj4gT24gTW9uLCBPY3QgNSwgMjAx NSBhdCA3OjUxIEFNLCBKaW0gR3VpY2hhcmQgKGpndWljaGFyKSANCj4gPGpndWljaGFyQGNpc2Nv LmNvbT4gd3JvdGU6DQo+ID4gR3JlZXRpbmdzIFdHOg0KPiA+DQo+ID4gT3VyIG1lZXRpbmcgaW4g WW9rb2hhbWEgaXMgZmFzdCBhcHByb2FjaGluZy4gQXMgYWx3YXlzIHRoZSBnb2FsIG9mIA0KPiA+ IHRoZSBtZWV0aW5nIHdpbGwgYmUgdG8gbWFrZSB0aGUgYmVzdCB1c2Ugb2Ygb3VyIGxpbWl0ZWQg ZmFjZS10by1mYWNlIHRpbWUuDQo+ID4gV2l0aCB0aGF0IGluIG1pbmQgd2Ugd2VsY29tZSByZXF1 ZXN0cyBmb3IgYWdlbmRhIHRpbWUuDQo+ID4NCj4gPiBBcyB3ZSBidWlsZCB0aGUgbWVldGluZyBh Z2VuZGEgb3VyIGdvYWwgd2lsbCBiZSB0byBzZWxlY3QgDQo+ID4gcHJlc2VudGF0aW9ucyB0aGF0 IGJlc3QgZnVydGhlciB0aGUgd29yayBvZiB0aGUgV0csIGFuZCB0aGF0IA0KPiA+IGdlbmVyYWxs eSBtZWFucyBmb2N1c2luZyBvbiBrZXkgY2hhcnRlciBkZWxpdmVyYWJsZXMgYW5kIHRvcGljcyB3 aXRoIA0KPiA+IGltcG9ydGFudCBvcGVuIGlzc3VlcyB0byByZXNvbHZlLiBXaGVuIG1ha2luZyBh IHJlcXVlc3QgcGxlYXNlIA0KPiA+IGNvbnNpZGVyIHdoYXQgeW91IHRoaW5rIHRoZSBXRyBzaG91 bGQgZG8gd2l0aCBpdHMgY29udGVudCDigJMgZm9yIGV4YW1wbGU6DQo+ID4NCj4gPiBEb2VzIHRo ZSBkb2N1bWVudCBoYXZlIHVzZWZ1bCBjb250ZW50IHRoYXQgc2hvdWxkIGJlIG1vdmVkIGludG8g DQo+ID4gYW5vdGhlciBXRyBkb2N1bWVudCBvciBwcm9ncmVzcyBvbiBpdHMgb3duIG1lcml0IERv ZXMgdGhlIGNvbnRlbnQgDQo+ID4gaGF2ZSBhIGdvb2QgYmFzaXMgZm9yIG9uZSBvZiB0aGUgV0cg ZG9jdW1lbnRzIHBlciB0aGUgY2hhcnRlciBTaG91bGQgDQo+ID4gdGhlIGRvY3VtZW50IGNvbnRl bnQgYmUgbWVyZ2VkIHdpdGggb25lIG9yIG1vcmUgb3RoZXIgZG9jdW1lbnRzLCBzbyANCj4gPiB0 aGF0IGEgY29tYmluZWQgZG9jdW1lbnQgY291bGQgYmVjb21lIGEgV0cgZG9jdW1lbnQNCj4gPg0K PiA+IEppbSAmIFRob21hcw0KPiA+DQo+ID4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18NCj4gPiBzZmMgbWFpbGluZyBsaXN0DQo+ID4gc2ZjQGlldGYub3Jn DQo+ID4gaHR0cHM6Ly93d3cuaWV0Zi5vcmcvbWFpbG1hbi9saXN0aW5mby9zZmMNCj4gPg0K From nobody Fri Oct 16 05:04:47 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F1B101A9174 for ; 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Fri, 16 Oct 2015 07:04:28 -0500 Received: from xch-rcd-008.cisco.com ([173.37.102.18]) by XCH-RCD-008.cisco.com ([173.37.102.18]) with mapi id 15.00.1104.000; Fri, 16 Oct 2015 07:04:28 -0500 From: "Paul Quinn (paulq)" To: "Joel M. Halpern" Thread-Topic: [sfc] #15 (control-plane): Whether the control plane operates on SFC IDs, SFP IDs, etc. Thread-Index: AQHQ8I9TaP+ioWasF0yH+cbhi+fUbJ4/uTKAgAE4bQCAAD5zgIAtWGyA Date: Fri, 16 Oct 2015 12:04:28 +0000 Message-ID: References: <066.a5062f0b71b46ed47abec3662c87c450@tools.ietf.org> <55F9A3A1.8000100@joelhalpern.com> <787AE7BB302AE849A7480A190F8B9330053950B1@OPEXCLILMA3.corporate.adroot.infra.ftgroup> <55FADE19.4000703@joelhalpern.com> In-Reply-To: <55FADE19.4000703@joelhalpern.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.19.17.230] Content-Type: text/plain; charset="Windows-1252" Content-ID: <504C8C527DB59F419E7C8625D9A8DA6E@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Cc: "draft-ietf-sfc-control-plane@tools.ietf.org" , "mohamed.boucadair@orange.com" , sfc issue tracker , "sfc@ietf.org" Subject: Re: [sfc] #15 (control-plane): Whether the control plane operates on SFC IDs, SFP IDs, etc. X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Oct 2015 12:04:47 -0000 Joel, I concur. =20 The data plane deal with paths, not chains. The relationship of paths to c= hains falls squarely in the control plane (or even more likely "policy" pla= ne) realm. The specificity of the path is left to implementation, in the a= rchitecture draft, but that's consistent with your position and provides th= e requisite functionality. =20 Paul > On Sep 17, 2015, at 11:36 AM, Joel M. Halpern wrote= : >=20 > As far as I can tell, there is nothing in the Service Chaining work that = requires correlating service path IDs with service chain IDs within the dat= a plane. Any such relationship exists entirely within the control plane or= above, and would be driven by requirements other than the data plane. Whe= n I look at this document, all of the requirements that talk about service = function chain IDs can be accurately captured, in terms of data plane requi= rements, by service function path IDs. Thus, the requirement that the data= plane has is to see such path IDs. Yes, in some deployments those will be= 1-1 with chain IDs. They are still path IDs. >=20 > Introducing a requirement for the data plane to see and work with chain I= Ds is not grounded in the work of the group. >=20 > Yours, > Joel M. Halpern >=20 > On 9/17/15 7:53 AM, mohamed.boucadair@orange.com wrote: >> Re-, >>=20 >> The control draft as it stands is compliant with the data plane architec= ture document. >>=20 >> Indeed, the arch draft acknowledges the following: >> (1) SFPs are "associated with a given SFC". >> (2) SFPs are presented as a form of constrained SFCs. >> (3) Some deployments may not impose any constraint on the abstract SFC. >> (4) Some others may impose either loose or strict routes. >>=20 >> Requiring SFP IDs for deployments that do not impose any constraint on t= he SFC is an oxymoron because according to the data plane architecture, an = SFP is a "constrained version of the original SFC". >>=20 >> For deployments that do not impose any constraint on the abstract SFC, b= ut adopt a fully distributed SFC forwarding strategy, a chain identifier is= sufficient. >>=20 >> Because an SFP may be associated with several SFCs, the identifier of th= e SFC may be required to associate an SFP with its SFC. >>=20 >> Below an excerpt from the arch draft, fwiw: >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D >> A service function path (SFP) is a mechanism used by service chaining >> to express the result of applying more granular policy and >> operational constraints to the abstract requirements of a service >> chain (SFC). This architecture does not mandate the degree of >> specificity of the SFP. Architecturally, within the same SFC-enabled >> domain, some SFPs may be fully specified, selecting exactly which SFF >> and which SF are to be visited by packets using that SFP, while other >> SFPs may be quite vague, deferring to the SFF the decisions about the >> exact sequence of steps to be used to realize the SFC. The >> specificity may be anywhere in between these extremes. >>=20 >> As an example of such an intermediate specificity, there may be two >> SFPs associated with a given SFC, where one SFP specifies that any >> order of SFF and SF may be used as long as it is within data center >> 1, and where the second SFP allows the same latitude, but only within >> data center 2. >>=20 >> Thus, the policies and logic of SFP selection or creation (depending >> upon the solution) produce what may be thought of as a constrained >> version of the original SFC. Since multiple policies may apply to >> different traffic that uses the same SFC, it also follows that there >> may be multiple SFPs may be associated with a single SFC. >> =3D=3D=3D=3D=3D=3D=3D >>=20 >> Cheers, >> Med >>=20 >>> -----Message d'origine----- >>> De : Joel M. Halpern [mailto:jmh@joelhalpern.com] >>> Envoy=E9 : mercredi 16 septembre 2015 19:15 >>> =C0 : sfc issue tracker; draft-ietf-sfc-control-plane@tools.ietf.org; >>> BOUCADAIR Mohamed IMT/OLN >>> Cc : sfc@ietf.org >>> Objet : Re: [sfc] #15 (control-plane): Whether the control plane operat= es >>> on SFC IDs, SFP IDs, etc. >>>=20 >>> Given that we have an adopted architecture that specifies that the >>> system should function in terms of service function paths, I would >>> prefer that the control requirements draft align with the architecture >>> in that regard. We are, as far as I know, specifying the requirements >>> for control mechanisms in support of the architecture and data plane we >>> standardize. >>>=20 >>> Yours, >>> Joel >>>=20 >>> On 9/16/15 9:46 AM, sfc issue tracker wrote: >>>> #15: Whether the control plane operates on SFC IDs, SFP IDs, etc. >>>>=20 >>>> The draft includes this note: >>>>=20 >>>> [[Note: The question of whether the data plane operates jus= t >>> in >>>> terms of SFP IDs or needs SFC IDs, as described in this >>> version >>>> of the draft, is still under discussion among the authors.]= ] >>>>=20 >>>> The current version of the draft is more generic as it does not >>> preclude >>>> manipulating service chains based on an identifier of the chain. Als= o, >>> it >>>> does not assume that the SFP indirection level is mandatory (SFP IDs= ). >>>>=20 >>>> Note the current version accommodates various deployment contexts: >>> e.g., >>>> rely solely on a chain ID, rely on a chain ID and a SFP, supply a >>> strict >>>> path, supply a loose path, etc. The purpose is to not dictate >>> deployment >>>> choices on how forwarding is actually achieved within an SFC-enabled >>>> domain. >>>>=20 >>>> An identifier of the chain is the minimum information that is needed= , >>> but >>>> other information may be supplied as well. >>>>=20 >>>> Feedback from the WG about which information to supply is needed. >>>>=20 >>>> FWIW, there is a ticket issue for this issue for the nsh spec. >>>>=20 >=20 > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc From nobody Mon Oct 19 00:03:39 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: 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SNT004-OMC2S29.hotmail.com over TLS secured channel with Microsoft SMTPSVC(7.5.7601.23008); Mon, 19 Oct 2015 00:03:31 -0700 X-TMN: [d0Xi6ERXXEPjfNgPbTATDw/kGOhxpz9sFjxvOUmTIAY=] X-Originating-Email: [gurong_cmcc@outlook.com] Message-ID: Content-Type: multipart/alternative; boundary="_8d3a923f-a2eb-4806-9874-14e185f99f55_" From: =?gb2312?B?ucvI1g==?= To: "sfc@ietf.org" Date: Mon, 19 Oct 2015 07:03:31 +0000 Importance: Normal MIME-Version: 1.0 X-OriginalArrivalTime: 19 Oct 2015 07:03:31.0572 (UTC) FILETIME=[4368EB40:01D10A3C] Archived-At: Cc: "gurong@chinamobile.com" , "hamid@broadcom.com" Subject: [sfc] Solict for comments: New Version Notification for draft-gu-sfc-test-report-sfc-nsh-00.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Oct 2015 07:03:38 -0000 --_8d3a923f-a2eb-4806-9874-14e185f99f55_ Content-Type: text/plain; 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with ESMTP id jONqk-ls6IvR for ; Mon, 19 Oct 2015 00:37:06 -0700 (PDT) Received: from mx5.zte.com.cn (mx5.zte.com.cn [63.217.80.70]) by ietfa.amsl.com (Postfix) with ESMTP id B48E31A6F83 for ; Mon, 19 Oct 2015 00:37:05 -0700 (PDT) Received: from mse01.zte.com.cn (unknown [10.30.3.20]) by Websense Email Security Gateway with ESMTPS id 26E6B9FAE5E3E; Mon, 19 Oct 2015 15:37:01 +0800 (CST) Received: from notes_smtp.zte.com.cn ([10.30.1.239]) by mse01.zte.com.cn with ESMTP id t9J7aYjR005840; Mon, 19 Oct 2015 15:36:34 +0800 (GMT-8) (envelope-from wang.cui1@zte.com.cn) In-Reply-To: References: <20150921081357.8630.47947.idtracker@ietfa.amsl.com> <6C7D9374-9A11-4D22-9E3C-7FA1EF2B9A95@cisco.com> <560036AB.1030001@joelhalpern.com> <56003F0B.9040002@joelhalpern.com> To: Sumandra Majee MIME-Version: 1.0 X-KeepSent: 810C88EB:A2BFFFCA-48257EE3:0025447C; type=4; name=$KeepSent X-Mailer: Lotus Notes Release 8.5.3 September 15, 2011 Message-ID: From: wang.cui1@zte.com.cn Date: Mon, 19 Oct 2015 15:36:32 +0800 X-MIMETrack: Serialize by Router on notes_smtp/zte_ltd(Release 8.5.3FP6|November 21, 2013) at 2015-10-19 15:36:22, Serialize complete at 2015-10-19 15:36:22 Content-Type: multipart/alternative; boundary="=_alternative 0029CEBF48257EE3_=" X-MAIL: mse01.zte.com.cn t9J7aYjR005840 Archived-At: Cc: "Carlos Pignataro \(cpignata\)" , "Joel M. Halpern" , "sfc@ietf.org" , Dave Dolson , Wei Meng Subject: Re: [sfc] New Version Notification for draft-wang-sfc-md-type-issues-00.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Oct 2015 07:37:10 -0000 This is a multipart message in MIME format. --=_alternative 0029CEBF48257EE3_= Content-Type: text/plain; charset="GB2312" Content-Transfer-Encoding: base64 RGVhciwNCg0KICAgVGhhbmtzIGZvciB5b3VyIHByZWNpc2UgZGlzY3Vzc2lvbiA6KQ0KDQogICBJ biBvdGhlciB3b3JkLCBldmVuIHVuZGVyIGJpZGlyZWN0aW9uYWwgc2NlbmFyaW8sICB0aGVyZSBp cyBubyBuZWVkIHRvIA0KYWRkIHBlci1TRlAgc3RhdGUgdG8gYXNzaXN0IHRoZSBmb3J3YXJkaW5n IG9uIHRoZSBTRnMuDQogICBUaGVuLCBwbGVhc2UgcmV0dXJuIGJhY2sgdG8gdGhlIHZlcnkgYmVn aW5uaW5nLCBpZiBpbiB0aGUgZGlhZ3JhbSBTRjMgDQpyZWNlaXZlcyB0cmFmZmljIGZyb20gbWl4 ZWQgZW52aXJvbm1lbnRzLCBob3cgU0YzIHRvIGNvcnJlY3RseSBhbmFseXplIHRoZSANCk1hbmRh 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=?euc-kr?B?wMy9wsDN?= To: "sfc@ietf.org" Thread-Topic: New Version Notification for draft-shin-sfc-control-plane-yang-00.txt Thread-Index: AQHRCkz7CwSKN3ApjU+2FnJ5Tu12PQ== Date: Mon, 19 Oct 2015 10:40:20 +0000 Message-ID: References: <20151019090310.1953.7772.idtracker@ietfa.amsl.com> Accept-Language: ko-KR, en-US Content-Language: ko-KR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [129.254.26.37] Content-Type: text/plain; charset="euc-kr" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: Mi-Jung Choi , =?euc-kr?B?vcW47bHi?= Subject: [sfc] Fwd: New Version Notification for draft-shin-sfc-control-plane-yang-00.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Oct 2015 10:40:26 -0000 RGVhciBzZmMgZm9sa3MsDQoNCldlIGhhdmUgc3VibWl0dGVkIGEgbmV3IGRyYWZ0IHdoaWNoIGNv 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ZXNjcmliZXMgY29tcG9uZW50cyBhbmQgcmVxdWlyZW1lbnRzIG9mIFNGQyBjb250cm9sIHBsYW5l Lg0KPiANCj4gDQo+IA0KPiANCj4gUGxlYXNlIG5vdGUgdGhhdCBpdCBtYXkgdGFrZSBhIGNvdXBs ZSBvZiBtaW51dGVzIGZyb20gdGhlIHRpbWUgb2Ygc3VibWlzc2lvbg0KPiB1bnRpbCB0aGUgaHRt bGl6ZWQgdmVyc2lvbiBhbmQgZGlmZiBhcmUgYXZhaWxhYmxlIGF0IHRvb2xzLmlldGYub3JnLg0K PiANCj4gVGhlIElFVEYgU2VjcmV0YXJpYXQNCj4gDQoNCg== From nobody Mon Oct 19 08:09:57 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 3706C1AC3F5 for ; Mon, 19 Oct 2015 08:09:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 3.34 X-Spam-Level: *** X-Spam-Status: No, score=3.34 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, CHARSET_FARAWAY_HEADER=3.2, HTML_MESSAGE=0.001, MIME_8BIT_HEADER=0.3, MIME_CHARSET_FARAWAY=2.45, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from 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New Version Notification for draft-kang-sfc-dynamic-path-selection-01.txt Thread-Index: AQHRCn8gfJPGJev150qgva0oW+Z1eZ5y6wsX Date: Mon, 19 Oct 2015 15:08:32 +0000 Message-ID: References: <20151019150100.30268.62966.idtracker@ietfa.amsl.com> In-Reply-To: <20151019150100.30268.62966.idtracker@ietfa.amsl.com> Accept-Language: ko-KR, en-US Content-Language: ko-KR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.215.33.51] Content-Type: multipart/alternative; boundary="_000_EE1EEAC78A332D40ACF8B5796CBD26AC2916988DMAILMBX02_" MIME-Version: 1.0 Archived-At: Subject: [sfc] =?euc-kr?q?=C0=FC=B4=DE=3A_New_Version_Notification_for_dra?= =?euc-kr?q?ft-kang-sfc-dynamic-path-selection-01=2Etxt?= X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Oct 2015 15:09:55 -0000 --_000_EE1EEAC78A332D40ACF8B5796CBD26AC2916988DMAILMBX02_ 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Hi,

We updated our draft.

Comments are reflected and some minor typo are updated.

Thanks.

 

Best Regards,

Taeho


________________________________________
=BA=B8=B3=BD =BB=E7=B6=F7: internet-drafts@ietf.org
=BA=B8=B3=BD =B3=AF=C2=A5: 2015=B3=E2 10=BF=F9 20=C0=CF =C8=AD=BF=E4=C0=CF = =BF=C0=C0=FC 12:01:00
=B9=DE=B4=C2 =BB=E7=B6=F7: =B9=E9=C0=BA=B0=E6(SDNFV TF); =B9=E9=C0=BA=B0=E6= (SDNFV TF); =B0=AD=C5=C2=C8=A3(SDN Project); =B1=E8=BC=BA=BC=F6(SDN Project= ); =B0=AD=C5=C2=C8=A3(SDN Project); =B1=E8=BC=BA=BC=F6(SDN Project); =B1=E8= =B3=B2=B0=EF(NFV Project); =B1=E8=B3=B2=B0=EF(NFV Project); =C7=D1=BF=B5=C5= =C2(Cloud Infra Project); =C7=D1=BF=B5=C5=C2(Cloud Infra Project)
=C1=A6=B8=F1: New Version Notification for draft-kang-sfc-dynamic-path-sele= ction-01.txt

A new version of I-D, draft-kang-sfc-dynamic-path-selection-01.txt
has been successfully submitted by Taeho Kang and posted to the
IETF repository.

Name: draft-kang-sfc-dynamic-path-selection
Revision: 01
Title: Dynamic Service Path Selection over Multiple Links between SFF and S= F for Enhancing Service Stability
Document date: 2015-10-19
Group: Individual Submission
Pages: 9
URL: https://www.ietf.org/internet-drafts/draft-kang-sfc-dynamic-path-selec= tion-01.txt
Status: https://datatracker.ietf.org/doc/draft-kang-sfc-dynamic-path-select= ion/
Htmlized: https://tools.ietf.org/html/draft-kang-sfc-dynamic-path-selection= -01
Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-kang-sfc-dynamic-path-selec= tion-01

Abstract:
In this document, we use SF classification of 1)indispensible SF for
packet delivery, allegedly mandatory SFs, such as NAT and 2)optional
SFs that a packet can be delivered without them, such as Firewall and
IDS.

The nodes of SFC-enabled domain can be various. Different vendors
make different types of equipments, and this causes performance
issues. Considering this diversity, the kind of SFs can be in myriad
form. Thus, we should distinguish some mandatory SFs from not
mandatory SFs and treat distinctively. Mandatory SFs should be
matched with higher-performance SFF to achieve high availability as
well as lower the probability of failure. Above all, whether each SF
is mandatory or optional should be registered in advance. Mandatory
SFs are to allocated to relatively higher-performance, larger
capacity, more stable SFFs. SFC constructed using this way of
allocation becomes the path for packets and packets are transferred
to classifier through C1 interface, and to SFF through C2 interface,
respectively.




Please note that it may take a couple of minutes from the time of submissio= n
until the htmlized version and diff are available at tools.ietf.org.

The IETF Secretariat

 

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This E-mail may contain confidential information and/or copyright material.= This email is intended for the use of the addressee only. If you receive t= his email by mistake, please either delete it without reproducing, distribu= ting or retaining copies thereof or notify the sender immediately.

--_000_EE1EEAC78A332D40ACF8B5796CBD26AC2916988DMAILMBX02_-- From nobody Tue Oct 20 00:14:32 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6A6ED1ACCE6 for ; Tue, 20 Oct 2015 00:14:31 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.211 X-Spam-Level: X-Spam-Status: No, score=-4.211 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QaIKKro7qcnh for ; Tue, 20 Oct 2015 00:14:29 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id E60E81AC44E for ; Tue, 20 Oct 2015 00:14:28 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml403-hub.china.huawei.com) ([172.18.7.190]) by lhrrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id BZA22894; 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Tue, 20 Oct 2015 08:43:23 +0100 From: Georgios Karagiannis To: "Jim Guichard (jguichar)" , "sfc@ietf.org" Thread-Topic: SFC WG agenda slots - Yokohama Thread-Index: AQHQ/2yEgKKh7mjWjUSUWGp1Wq1ho550FXyA Date: Tue, 20 Oct 2015 07:43:22 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-US, zh-CN Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.221.64.21] Content-Type: multipart/alternative; boundary="_000_C5034E44CD620A44971BAAEB372655DC159E8216lhreml502mbs_" MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Cc: "yangxu \(H\)" , "Zhulei \(MBB Research\)" Subject: Re: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 20 Oct 2015 07:43:41 -0000 --_000_C5034E44CD620A44971BAAEB372655DC159E8216lhreml502mbs_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Jim, Hi Thomas, Please note that we have just submitted draft-yang-sfc-trace-issue-analysis= -00.txt, see: https://www.ietf.org/internet-drafts/draft-yang-sfc-trace-issue-analysis-00= .txt More details on this draft are provided below. This draft can be considered= as a complementary input for draft.penno-sfc-trace-03. We would very much appreciate to receive a time slot of 10 minutes in order= to present this draft. My colleague: Lei Zhu will present this draft. Best regards, Georgios > -----Original Message----- > From: Georgios Karagiannis > Sent: 20 October 2015 09:14 > To: sfc@ietf.org > Cc: Zhulei (MBB Research); yangxu (H) > Subject: FW: New Version Notification for draft-yang-sfc-trace-issue-anal= ysis- > 00.txt (complements draft.penno-sfc-trace) > > Hi all, > > Please note that we have just submitted the draft-yang-sfc-trace-issue- > analysis-00.txt, see below. > This document analyzes and provides solutions for the unaddressed SFC > Traceroute issues. > > In particular, draft-ietf-sfc-oam-framework provides a reference framewor= k for > SFC OAM and lists several OAM functions that help to monitor the SFC > components. The draft.penno-sfc-trace-03 describes a solution of SFC > traceroute based on NSH header, but only a subset of the requirements pro= vided > in draft.ietf-sfc-oam-framework are addressed. The goal of this draft is = to > provide solutions for the rest of the requirements and as well as analyze > other potential issues. > Please consider this draft as a complementary input for draft.penno-sfc-t= race- > 03. > > Best regards, > Georgios > > > > > -----Original Message----- > > From: internet-drafts@ietf.org [mailto= :internet-drafts@ietf.org] > > Sent: 19 October 2015 20:15 > > To: Zhulei (MBB Research); yangxu (H); Georgios Karagiannis > > Subject: New Version Notification for > > draft-yang-sfc-trace-issue-analysis- > > 00.txt > > > > > > A new version of I-D, draft-yang-sfc-trace-issue-analysis-00.txt > > has been successfully submitted by Georgios Karagiannis and posted to > > the IETF repository. > > > > Name: draft-yang-sfc-trace-issue-analysis > > Revision: 00 > > Title: SFC Trace Issue Analysis and Solutions > > Document date: 2015-10-19 > > Group: Individual Submission > > Pages: 10 > > URL: https://www.ietf.org/internet-drafts/draft-yang-sfc-tra= ce-issue-analysis-00.txt > > Status: https://datatracker.ietf.org/doc/draft-yang-sfc-trace-i= ssue-analysis/ > > Htmlized: https://tools.ietf.org/html/draft-yang-sfc-trace-issue-= analysis-00 > > > > > > Abstract: > > This document analyzes and provides solutions for some unaddressed > > SFC Traceroute issues. > > From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Jim Guichard (jguichar= ) Sent: 05 October 2015 14:51 To: sfc@ietf.org Subject: [sfc] SFC WG agenda slots - Yokohama Greetings WG: Our meeting in Yokohama is fast approaching. As always the goal of the meet= ing will be to make the best use of our limited face-to-face time. With tha= t in mind we welcome requests for agenda time. As we build the meeting agenda our goal will be to select presentations tha= t best further the work of the WG, and that generally means focusing on key= charter deliverables and topics with important open issues to resolve. Whe= n making a request please consider what you think the WG should do with its= content - for example: * Does the document have useful content that should be moved into anoth= er WG document or progress on its own merit * Does the content have a good basis for one of the WG documents per th= e charter * Should the document content be merged with one or more other document= s, so that a combined document could become a WG document Jim & Thomas --_000_C5034E44CD620A44971BAAEB372655DC159E8216lhreml502mbs_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Jim, Hi Thomas,

 

Please note that we have just submitted dra= ft-yang-sfc-trace-issue-analysis-00.txt, see:

https://www.ietf.org/internet-drafts/draft-yang-sfc-trace-issue-analysis-= 00.txt

 

More details on this draft are provided bel= ow. This draft can be considered as a complementary input for draft.penno-s= fc-trace-03.

 

We would very much appreciate to receive a tim= e slot of 10 minutes in order to present this draft.

My colleague: Lei Zhu will present this draft.=

 

Best regards,

Georgios

 

 

 

 

> -----Original Message-----

> From: Georgios Karagiannis

> Sent: 20 October 2015 09:14

> To: sfc@ietf.org

> Cc: Zhulei (MBB Research); yangxu (H)

> Subject: FW: New Version Notification for dr= aft-yang-sfc-trace-issue-analysis-

> 00.txt (complements draft.penno-sfc-trace)

>

> Hi all,

>

> Please note that we have just submitted the = draft-yang-sfc-trace-issue-

> analysis-00.txt, see below.

> This document analyzes and provides solution= s for the unaddressed SFC

> Traceroute issues.

>

> In particular, draft-ietf-sfc-oam-framework = provides a reference framework for

> SFC OAM and lists several OAM functions that= help to monitor the SFC

> components. The draft.penno-sfc-trace-03 des= cribes a solution of SFC

> traceroute based on NSH header, but only a s= ubset of the requirements provided

> in draft.ietf-sfc-oam-framework are addresse= d. The goal of this draft is to

> provide solutions for the rest of the requir= ements and as well as analyze

> other potential issues.

> Please consider this draft as a complementar= y input for draft.penno-sfc-trace-

> 03.

>

> Best regards,

> Georgios

>

>

>

> > -----Original Message-----

> > From: internet-d= rafts@ietf.org [mailto:internet-drafts@ie= tf.org]

> > Sent: 19 October 2015 20:15<= /p>

> > To: Zhulei (MBB Research); yangxu (H); = Georgios Karagiannis

> > Subject: New Version Notification for

> > draft-yang-sfc-trace-issue-analysis-

> > 00.txt

> >

> >

> > A new version of I-D, draft-yang-sfc-tr= ace-issue-analysis-00.txt

> > has been successfully submitted by Geor= gios Karagiannis and posted to

> > the IETF repository.

> >

> > Name:     &nbs= p;   draft-yang-sfc-trace-issue-analysis

> > Revision:     00

> > Title:     &nb= sp;  SFC Trace Issue Analysis and Solutions

> > Document date:    &= nbsp; 2015-10-19

> > Group:     &nb= sp;  Individual Submission

> > Pages:     &nb= sp;  10

> > URL:      = ;      https://www.ietf.org/inter= net-drafts/draft-yang-sfc-trace-issue-analysis-00.txt

> > Status:     &n= bsp;   https://datatracker.ietf.org/doc/draft-yang-sfc-trace-issue-analysis/

> > Htmlized:     =   https://tools.ietf.org/html/draft-yang-sfc-trace-issue-analysis-00=

> >

> >

> > Abstract:

> >    This document analyze= s and provides solutions for some unaddressed

> >    SFC Traceroute issues= .

> >

 <= /p>

 <= /p>

From: sfc [mai= lto:sfc-bounces@ietf.org] On Behalf Of Jim Guichard (jguichar)
Sent: 05 October 2015 14:51
To: sfc@ietf.org
Subject: [sfc] SFC WG agenda slots - Yokohama

 

Greetings WG:

 

Our meeting in Yokohama is = fast approaching. As always the goal of the meeting will be to make the bes= t use of our limited face-to-face time. With that in mind we welcome requests for agenda time. 

 

As we build the meeting age= nda our goal will be to select presentations that best further the work of = the WG, and that generally means focusing on key charter deliverables and topics with important open issues to resolve. When making= a request please consider what you think the WG should do with its content= – for example:

  • Does the document have useful content that should be moved int= o another WG document or progress on its own merit
    • Does the content have a good basis for one of the WG documents= per the charter
  • Should the document content be merged with one or more other d= ocuments, so that a combined document could become a WG document=

Jim & Thomas=

--_000_C5034E44CD620A44971BAAEB372655DC159E8216lhreml502mbs_-- From nobody Tue Oct 20 03:26:46 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 37EAB1B324E for ; Tue, 20 Oct 2015 03:26:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.201 X-Spam-Level: X-Spam-Status: No, score=-4.201 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WZmAJx65JO-z for ; Tue, 20 Oct 2015 03:26:43 -0700 (PDT) Received: from usevmg20.ericsson.net (usevmg20.ericsson.net [198.24.6.45]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4298B1B3251 for ; Tue, 20 Oct 2015 03:26:43 -0700 (PDT) X-AuditID: c618062d-f79ef6d000007f54-49-5625b658a2dc Received: from EUSAAHC004.ericsson.se (Unknown_Domain [147.117.188.84]) by usevmg20.ericsson.net (Symantec Mail Security) with SMTP id B2.D8.32596.856B5265; 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Thu, 22 Oct 2015 10:44:55 -0500 Received: from xch-rcd-009.cisco.com ([173.37.102.19]) by XCH-RCD-009.cisco.com ([173.37.102.19]) with mapi id 15.00.1104.000; Thu, 22 Oct 2015 10:44:55 -0500 From: "Reinaldo Penno (repenno)" To: "sfc@ietf.org" Thread-Topic: NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYBw== Date: Thu, 22 Oct 2015 15:44:55 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.5.4.150722 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.66.60] Content-Type: multipart/alternative; boundary="_000_D24E52991BFF7repennociscocom_" MIME-Version: 1.0 Archived-At: Subject: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 15:45:30 -0000 --_000_D24E52991BFF7repennociscocom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hello fellow SFCers, wanted to share implementation experience on NSH Loop prevention topic. I m= ight write a draft about this during/after the IETF but a presentation seem= s fine at this point. This is not really exhaustive, just a summary to gaug= e interest on the topic. https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl=3D0 Thanks, -RP --_000_D24E52991BFF7repennociscocom_ Content-Type: text/html; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable
Hello fellow SFCers,

wanted to share implementation experience on NSH Loop prevention topic= . I might write a draft about this during/after the IETF but a presentation= seems fine at this point. This is not really exhaustive, just a summary to= gauge interest on the topic.

https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D0

Thanks,

-RP

--_000_D24E52991BFF7repennociscocom_-- From nobody Thu Oct 22 10:35:59 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F3B291B3A83 for ; Thu, 22 Oct 2015 10:35:57 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.602 X-Spam-Level: X-Spam-Status: No, score=-2.602 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Ww1xnVWGSkcf for ; Thu, 22 Oct 2015 10:35:56 -0700 (PDT) Received: from mailb2.tigertech.net (mailb2.tigertech.net [208.80.4.154]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A5D701B3A7D for ; Thu, 22 Oct 2015 10:35:56 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mailb2.tigertech.net (Postfix) with ESMTP id 8E855760BD8; Thu, 22 Oct 2015 10:35:56 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at b2.tigertech.net Received: from Joels-MacBook-Pro.local (209-255-163-147.ip.mcleodusa.net [209.255.163.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailb2.tigertech.net (Postfix) with ESMTPSA id 360F1760BD6; Thu, 22 Oct 2015 10:35:56 -0700 (PDT) To: "Reinaldo Penno (repenno)" , "sfc@ietf.org" References: From: "Joel M. Halpern" Message-ID: <56291E7B.1070905@joelhalpern.com> Date: Thu, 22 Oct 2015 13:35:55 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 17:35:58 -0000 The description of the problem makes me wonder if we are decrementing the SFP ID in the wrong place. In terms of my implementation, it is helpful to have the SF do the decrementing. But most of these problems disappear if the SFF is responsible for the decrementing. I also have concerns with the material on slides 3 and 5. The disucssion in slide 3 assumes that the outer encaps is IP, and it assumes that the TTL on the outgoing transport header is related to the TTL on the incoming transport header. But there is no reason for there to be a relationship. A perfectly valid implementation strips transport, looks at NSH, then generates transport. If SFF do not decrement SFP ID, and if the SFF are misconfigured, a non-terminating loop results. Slide 5 assumes that the SFF knows, when processing a received packet from an SF, what the index was when it sent the packet to the SF. Even in the case where the outbound processing SFF is the inbound processing SFF, there is no reason it should have saved that state, and the assumed packet matching is neither obvious nor simple. Yours, Joel On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: > Hello fellow SFCers, > > wanted to share implementation experience on NSH Loop prevention topic. > I might write a draft about this during/after the IETF but a > presentation seems fine at this point. This is not really exhaustive, > just a summary to gauge interest on the topic. > > https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl=0 > > Thanks, > > -RP > > > > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc > From nobody Thu Oct 22 10:48:47 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 6BE9F1B3AB7 for ; Thu, 22 Oct 2015 10:48:41 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id eGEjKd3eQb8q for ; Thu, 22 Oct 2015 10:48:37 -0700 (PDT) Received: from alln-iport-5.cisco.com (alln-iport-5.cisco.com [173.37.142.92]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 42CB21B3AC5 for ; Thu, 22 Oct 2015 10:48:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=2469; q=dns/txt; s=iport; t=1445536117; x=1446745717; h=from:to:subject:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=tRkuXU7KU0AilgvBKwlsmyYisLSyazJv2JVwgtuVlVo=; b=Wk5FJ60gExxeQYi9+hntOysFtDKHiEinmjOGA8Vpu46Hrf2oA+gQFo+5 N+gUZdtOzBgzMWVhvXEOfHBUtpyJb90F/0DHlKjWoHbTQaGcl1E7prvrG IQcs+58OWtb3fmL8RYw5IVfjH51+/r0uGGC+7GFtePSH7es6hZs3aBYiW Q=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D1AQDyIClW/4QNJK1egzZUbwa+GwENgVkXCoV8AoFIOBQBAQEBAQEBgQqELwEBBAEBAWsEFwIBCBguJwslAgQBEhuIFQ24BI0kAQEBAQEBAQEBAQEBAQEBAQEBARYEhneEfoRaOoQuBY1NiF4BjR2cJQEfAQFChANyAYU8gQYBAQE X-IronPort-AV: E=Sophos;i="5.20,183,1444694400"; d="scan'208";a="200611737" Received: from alln-core-10.cisco.com ([173.36.13.132]) by alln-iport-5.cisco.com with ESMTP; 22 Oct 2015 17:48:36 +0000 Received: from XCH-ALN-007.cisco.com (xch-aln-007.cisco.com [173.36.7.17]) by alln-core-10.cisco.com (8.14.5/8.14.5) with ESMTP id t9MHmaUx005770 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Thu, 22 Oct 2015 17:48:36 GMT Received: from xch-rcd-009.cisco.com (173.37.102.19) by XCH-ALN-007.cisco.com (173.36.7.17) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Thu, 22 Oct 2015 12:48:16 -0500 Received: from xch-rcd-009.cisco.com ([173.37.102.19]) by XCH-RCD-009.cisco.com ([173.37.102.19]) with mapi id 15.00.1104.000; Thu, 22 Oct 2015 12:48:16 -0500 From: "Reinaldo Penno (repenno)" To: "Joel M. Halpern" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWA//+OL4A= Date: Thu, 22 Oct 2015 17:48:16 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> In-Reply-To: <56291E7B.1070905@joelhalpern.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.5.4.150722 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.232.244] Content-Type: text/plain; charset="iso-8859-1" Content-ID: <84F7E7AEEF1CD841AC50066BD2EF4934@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 17:48:41 -0000 Joel, Thanks for the comments, inline with [RP] On 10/22/15, 10:35 AM, "Joel M. Halpern" wrote: >The description of the problem makes me wonder if we are decrementing >the SFP ID in the wrong place. In terms of my implementation, it is >helpful to have the SF do the decrementing. But most of these problems >disappear if the SFF is responsible for the decrementing. > >I also have concerns with the material on slides 3 and 5. The >disucssion in slide 3 assumes that the outer encaps is IP, [RP] yes, that is the case. Other encaps will most likely solve this in a different way.=20 For example if the outer encap is L2 (ethernet) then STP will probably need to be used.=20 >and it=20 >assumes that the TTL on the outgoing transport header is related to the >TTL on the incoming transport header. But there is no reason for there >to be a relationship. A perfectly valid implementation strips >transport, looks at NSH, then generates transport. If SFF do not >decrement SFP ID, and if the SFF are misconfigured, a non-terminating >loop results. [RP] Yes, that is a valid implementation but what I=B9m suggesting is that if the TTL is not=20 decremented across VXLAN segments than serious problems might happen. Whether the developer want to heed to the advice or not is his(er) choice. > >Slide 5 assumes that the SFF knows, when processing a received packet >from an SF, what the index was when it sent the packet to the SF. Even >in the case where the outbound processing SFF is the inbound processing >SFF, there is no reason it should have saved that state, and the assumed >packet matching is neither obvious nor simple. [RP] yep, correct. Other solutions might be be even more intense in terms of data plane. This is one suggestion. > >Yours, >Joel > >On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >> Hello fellow SFCers, >> >> wanted to share implementation experience on NSH Loop prevention topic. >> I might write a draft about this during/after the IETF but a >> presentation seems fine at this point. This is not really exhaustive, >> just a summary to gauge interest on the topic. >> >> https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl=3D= 0 >> >> Thanks, >> >> -RP >> >> >> >> _______________________________________________ >> sfc mailing list >> sfc@ietf.org >> https://www.ietf.org/mailman/listinfo/sfc >> From nobody Thu Oct 22 11:06:12 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8E9131AC3DF for ; Thu, 22 Oct 2015 11:06:09 -0700 (PDT) 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=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mwl8jGy3KUHj for ; Thu, 22 Oct 2015 11:06:08 -0700 (PDT) Received: from mail1.sandvine.com (Mail1.sandvine.com [64.7.137.134]) by ietfa.amsl.com (Postfix) with ESMTP id C54771A92ED for ; Thu, 22 Oct 2015 11:06:07 -0700 (PDT) Received: from WTL-EXCHP-2.sandvine.com ([fe80::68ac:f071:19ff:3455]) by wtl-exchp-1.sandvine.com ([fe80::ac6b:cc1e:f2ff:93aa%18]) with mapi id 14.03.0195.001; Thu, 22 Oct 2015 14:06:01 -0400 From: Dave Dolson To: "Joel M. Halpern" , "Reinaldo Penno (repenno)" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554CYKA///AVUA= Date: Thu, 22 Oct 2015 18:06:08 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> In-Reply-To: <56291E7B.1070905@joelhalpern.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.200.63] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 18:06:09 -0000 To add to Joel's comments, (which I agree with), 1. This isn't a solution for NSH carried directly in an Ethernet frame or o= ther non-IP encapsulations. 2. If I understand correctly, there is a blatant layering violation. In fac= t, the IP TTL will be decremented by both SFF functions and also by the rou= ters delivering the IP/VxLAN packets between IP end-points. E.g., a single = SFF-to-SFF hop could be up to 255 IP hops. 3. If an SF does not decrement the path index, I see that as a bug in SF im= plementation, not a misconfiguration. So I don't think the slides 5 or 6 cases need to be handled. I do see that loops between SFFs (slide 3) are a real problem caused by mis= configuration of SFF forwarding tables, due to buggy orchestration. What is a best-practice for solving such problems with an SDN mind-set? Clearly it is possible to (mis)configure OpenFlow switches to create an inf= inite packet loop. Is it expected to drop a packet passing too many hops, or merely to detect = a problem? -Dave -----Original Message----- From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern Sent: Thursday, October 22, 2015 1:36 PM To: Reinaldo Penno (repenno); sfc@ietf.org Subject: Re: [sfc] NSH Loop Prevention The description of the problem makes me wonder if we are decrementing=20 the SFP ID in the wrong place. In terms of my implementation, it is=20 helpful to have the SF do the decrementing. But most of these problems=20 disappear if the SFF is responsible for the decrementing. I also have concerns with the material on slides 3 and 5. The=20 disucssion in slide 3 assumes that the outer encaps is IP, and it=20 assumes that the TTL on the outgoing transport header is related to the=20 TTL on the incoming transport header. But there is no reason for there=20 to be a relationship. A perfectly valid implementation strips=20 transport, looks at NSH, then generates transport. If SFF do not=20 decrement SFP ID, and if the SFF are misconfigured, a non-terminating=20 loop results. Slide 5 assumes that the SFF knows, when processing a received packet=20 from an SF, what the index was when it sent the packet to the SF. Even=20 in the case where the outbound processing SFF is the inbound processing=20 SFF, there is no reason it should have saved that state, and the assumed=20 packet matching is neither obvious nor simple. Yours, Joel On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: > Hello fellow SFCers, > > wanted to share implementation experience on NSH Loop prevention topic. > I might write a draft about this during/after the IETF but a > presentation seems fine at this point. This is not really exhaustive, > just a summary to gauge interest on the topic. > > https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl=3D0 > > Thanks, > > -RP > > > > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc > _______________________________________________ sfc mailing list sfc@ietf.org https://www.ietf.org/mailman/listinfo/sfc From nobody Thu Oct 22 11:18:14 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C8FF61B2AB5 for ; Thu, 22 Oct 2015 11:18:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id k7eLuApzByMr for ; Thu, 22 Oct 2015 11:18:12 -0700 (PDT) Received: from rcdn-iport-7.cisco.com (rcdn-iport-7.cisco.com [173.37.86.78]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EB80F1B2AAF for ; Thu, 22 Oct 2015 11:18:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=3666; q=dns/txt; s=iport; t=1445537892; x=1446747492; h=from:to:subject:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=aqsWm2+zma5hFCMoC6V6XhYk4a1bqNQpv1RuTaamJgs=; b=hkDwq1gZ/yS+xUZD56kGFYB4AOy5nb5I4cgWkRQQeVxptKm8qFeubuUs U1cLaYpjhaVW26SQXfZGwe4EhRjNd5gKcy+7uGPxbjnQpylFUh4TnXqQA xRkKbEvf+VCqV6f2WYtXSKK/zeweBq5dmfC4uzFdl4QfWIF+pXse+oE5w 4=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D1AQAMJylW/5ldJa1egzZUbwa+HAENgVkXCoV8AoFLOBQBAQEBAQEBgQqELgEBAQQBAQE3LQcEEwQCAQgOAwQBAQEeCQcnCxQJCAIEARIbiBUNuBSNJQEBAQEBAQEBAQEBAQEBAQEBAQEBARQEhneEfoRaOgaEKAWWKwGNHZwlAR8BAUKEA3IBhTyBBgEBAQ X-IronPort-AV: E=Sophos;i="5.20,183,1444694400"; d="scan'208";a="38105332" Received: from rcdn-core-2.cisco.com ([173.37.93.153]) by rcdn-iport-7.cisco.com with ESMTP; 22 Oct 2015 18:18:11 +0000 Received: from XCH-ALN-010.cisco.com (xch-aln-010.cisco.com [173.36.7.20]) by rcdn-core-2.cisco.com (8.14.5/8.14.5) with ESMTP id t9MIIAWX032514 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Thu, 22 Oct 2015 18:18:11 GMT Received: from xch-rcd-009.cisco.com (173.37.102.19) by XCH-ALN-010.cisco.com (173.36.7.20) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Thu, 22 Oct 2015 13:17:50 -0500 Received: from xch-rcd-009.cisco.com ([173.37.102.19]) by XCH-RCD-009.cisco.com ([173.37.102.19]) with mapi id 15.00.1104.000; Thu, 22 Oct 2015 13:17:50 -0500 From: "Reinaldo Penno (repenno)" To: Dave Dolson , "Joel M. Halpern" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AA== Date: Thu, 22 Oct 2015 18:17:50 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.5.4.150722 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.232.244] Content-Type: text/plain; charset="us-ascii" Content-ID: <12033B68B79C5E4292C3F6DA4F4188CF@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 18:18:14 -0000 On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >To add to Joel's comments, (which I agree with), > >1. This isn't a solution for NSH carried directly in an Ethernet frame or >other non-IP encapsulations. [RP] Answered that one to Joel. > >2. If I understand correctly, there is a blatant layering violation. In >fact, the IP TTL will be decremented by both SFF functions and also by >the routers delivering the IP/VxLAN packets between IP end-points. E.g., >a single SFF-to-SFF hop could be up to 255 IP hops. [RP] This is not clear but a good point for more discussion. > >3. If an SF does not decrement the path index, I see that as a bug in SF >implementation, not a misconfiguration. >So I don't think the slides 5 or 6 cases need to be handled. [RP] Yes, it is a bug but should you protect the network or not? We know that a high speed loop will make the network crawl and crash. > > >I do see that loops between SFFs (slide 3) are a real problem caused by >misconfiguration of SFF forwarding tables, due to buggy orchestration. > >What is a best-practice for solving such problems with an SDN mind-set? >Clearly it is possible to (mis)configure OpenFlow switches to create an >infinite packet loop. >Is it expected to drop a packet passing too many hops, or merely to >detect a problem? [RP] All good points, the purpose of the presentation was to foster this discussion and see what we can do (or suggest should be done) about it > > >-Dave > > > >-----Original Message----- >From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >Sent: Thursday, October 22, 2015 1:36 PM >To: Reinaldo Penno (repenno); sfc@ietf.org >Subject: Re: [sfc] NSH Loop Prevention > >The description of the problem makes me wonder if we are decrementing >the SFP ID in the wrong place. In terms of my implementation, it is >helpful to have the SF do the decrementing. But most of these problems >disappear if the SFF is responsible for the decrementing. > >I also have concerns with the material on slides 3 and 5. The >disucssion in slide 3 assumes that the outer encaps is IP, and it >assumes that the TTL on the outgoing transport header is related to the >TTL on the incoming transport header. But there is no reason for there >to be a relationship. A perfectly valid implementation strips >transport, looks at NSH, then generates transport. If SFF do not >decrement SFP ID, and if the SFF are misconfigured, a non-terminating >loop results. > >Slide 5 assumes that the SFF knows, when processing a received packet >from an SF, what the index was when it sent the packet to the SF. Even >in the case where the outbound processing SFF is the inbound processing >SFF, there is no reason it should have saved that state, and the assumed >packet matching is neither obvious nor simple. > >Yours, >Joel > >On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >> Hello fellow SFCers, >> >> wanted to share implementation experience on NSH Loop prevention topic. >> I might write a draft about this during/after the IETF but a >> presentation seems fine at this point. This is not really exhaustive, >> just a summary to gauge interest on the topic. >> >> https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl=3D= 0 >> >> Thanks, >> >> -RP >> >> >> >> _______________________________________________ >> sfc mailing list >> sfc@ietf.org >> https://www.ietf.org/mailman/listinfo/sfc >> > >_______________________________________________ >sfc mailing list >sfc@ietf.org >https://www.ietf.org/mailman/listinfo/sfc From nobody Thu Oct 22 11:25:30 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 14EBC1A7002 for ; Thu, 22 Oct 2015 11:25:29 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.602 X-Spam-Level: X-Spam-Status: No, score=-2.602 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id W1k9KIcIk3Xc for ; Thu, 22 Oct 2015 11:25:27 -0700 (PDT) Received: from mailb2.tigertech.net (mailb2.tigertech.net [208.80.4.154]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4E29E1A6FAD for ; Thu, 22 Oct 2015 11:25:27 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mailb2.tigertech.net (Postfix) with ESMTP id 2FCDD800CC0; Thu, 22 Oct 2015 11:25:27 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at b2.tigertech.net Received: from Joels-MacBook-Pro.local (209-255-163-147.ip.mcleodusa.net [209.255.163.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailb2.tigertech.net (Postfix) with ESMTPSA id AE3C3800CBE; Thu, 22 Oct 2015 11:25:26 -0700 (PDT) To: "Reinaldo Penno (repenno)" , Dave Dolson , "sfc@ietf.org" References: <56291E7B.1070905@joelhalpern.com> From: "Joel M. Halpern" Message-ID: <56292A15.901@joelhalpern.com> Date: Thu, 22 Oct 2015 14:25:25 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 18:25:29 -0000 In case it was unclear, I very much appreciate your raising the points. I am concerned that we probably need a systemic approach to solving the SFF forwarding loop problem. Solutions which depend upon the combination of transport protocol behaviors and unspecified mechanisms in the SFF (such as relating incoming and outgoing transport TTLs) would seem to indicate that we have an incomplete specification. Yours, Joel On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: > > > On 10/22/15, 11:06 AM, "Dave Dolson" wrote: > >> To add to Joel's comments, (which I agree with), >> >> 1. This isn't a solution for NSH carried directly in an Ethernet frame or >> other non-IP encapsulations. > > [RP] Answered that one to Joel. > >> >> 2. If I understand correctly, there is a blatant layering violation. In >> fact, the IP TTL will be decremented by both SFF functions and also by >> the routers delivering the IP/VxLAN packets between IP end-points. E.g., >> a single SFF-to-SFF hop could be up to 255 IP hops. > > [RP] This is not clear but a good point for more discussion. > >> >> 3. If an SF does not decrement the path index, I see that as a bug in SF >> implementation, not a misconfiguration. >> So I don't think the slides 5 or 6 cases need to be handled. > > > [RP] Yes, it is a bug but should you protect the network or not? We know > that a high speed loop will make the network crawl and crash. > >> >> >> I do see that loops between SFFs (slide 3) are a real problem caused by >> misconfiguration of SFF forwarding tables, due to buggy orchestration. >> >> What is a best-practice for solving such problems with an SDN mind-set? >> Clearly it is possible to (mis)configure OpenFlow switches to create an >> infinite packet loop. >> Is it expected to drop a packet passing too many hops, or merely to >> detect a problem? > > > [RP] All good points, the purpose of the presentation was to foster this > discussion and see what we can do (or suggest should be done) about it > >> >> >> -Dave >> >> >> >> -----Original Message----- >> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >> Sent: Thursday, October 22, 2015 1:36 PM >> To: Reinaldo Penno (repenno); sfc@ietf.org >> Subject: Re: [sfc] NSH Loop Prevention >> >> The description of the problem makes me wonder if we are decrementing >> the SFP ID in the wrong place. In terms of my implementation, it is >> helpful to have the SF do the decrementing. But most of these problems >> disappear if the SFF is responsible for the decrementing. >> >> I also have concerns with the material on slides 3 and 5. The >> disucssion in slide 3 assumes that the outer encaps is IP, and it >> assumes that the TTL on the outgoing transport header is related to the >> TTL on the incoming transport header. But there is no reason for there >> to be a relationship. A perfectly valid implementation strips >> transport, looks at NSH, then generates transport. If SFF do not >> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >> loop results. >> >> Slide 5 assumes that the SFF knows, when processing a received packet >>from an SF, what the index was when it sent the packet to the SF. Even >> in the case where the outbound processing SFF is the inbound processing >> SFF, there is no reason it should have saved that state, and the assumed >> packet matching is neither obvious nor simple. >> >> Yours, >> Joel >> >> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>> Hello fellow SFCers, >>> >>> wanted to share implementation experience on NSH Loop prevention topic. >>> I might write a draft about this during/after the IETF but a >>> presentation seems fine at this point. This is not really exhaustive, >>> just a summary to gauge interest on the topic. >>> >>> https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl=0 >>> >>> Thanks, >>> >>> -RP >>> >>> >>> >>> _______________________________________________ >>> sfc mailing list >>> sfc@ietf.org >>> https://www.ietf.org/mailman/listinfo/sfc >>> >> >> _______________________________________________ >> sfc mailing list >> sfc@ietf.org >> https://www.ietf.org/mailman/listinfo/sfc > > From nobody Thu Oct 22 11:51:05 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 688BF1B3B59 for ; Thu, 22 Oct 2015 11:51:03 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.91 X-Spam-Level: X-Spam-Status: No, score=-1.91 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8ccHsUfQnxHs for ; Thu, 22 Oct 2015 11:51:01 -0700 (PDT) Received: from mail1.sandvine.com (mail1.sandvine.com [64.7.137.165]) by ietfa.amsl.com (Postfix) with ESMTP id 587231B3B57 for ; Thu, 22 Oct 2015 11:51:01 -0700 (PDT) Received: from BLR-EXCHP-2.sandvine.com (192.168.196.172) by WTL-EXCHP-3.sandvine.com (192.168.196.177) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 22 Oct 2015 14:51:00 -0400 Received: from WTL-EXCHP-2.sandvine.com ([fe80::68ac:f071:19ff:3455]) by blr-exchp-2.sandvine.com ([fe80::6c6d:7108:c63c:9055%14]) with mapi id 14.03.0181.006; Thu, 22 Oct 2015 14:51:00 -0400 From: Dave Dolson To: "Joel M. Halpern" , "Reinaldo Penno (repenno)" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554CYKA///AVUCAAEthAIAAAh6A///CL9A= Date: Thu, 22 Oct 2015 18:51:01 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> In-Reply-To: <56292A15.901@joelhalpern.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.200.63] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 18:51:03 -0000 It occurs to me that *both* SFFs and SFs could decrement the Path Index. This makes the longest path to be 127 vs. 255. But the packet would never be placed on the network with the same index twi= ce. I came to my point about not handling bugs by analogy:=20 - if we have routers that do not decrement TTL, there can be loops. But we = don't add another mechanism on top to detect if such buggy routers exist. -----Original Message----- From: Joel M. Halpern [mailto:jmh@joelhalpern.com]=20 Sent: Thursday, October 22, 2015 2:25 PM To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org Subject: Re: [sfc] NSH Loop Prevention In case it was unclear, I very much appreciate your raising the points. I am concerned that we probably need a systemic approach to solving the=20 SFF forwarding loop problem. Solutions which depend upon the=20 combination of transport protocol behaviors and unspecified mechanisms=20 in the SFF (such as relating incoming and outgoing transport TTLs) would=20 seem to indicate that we have an incomplete specification. Yours, Joel On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: > > > On 10/22/15, 11:06 AM, "Dave Dolson" wrote: > >> To add to Joel's comments, (which I agree with), >> >> 1. This isn't a solution for NSH carried directly in an Ethernet frame o= r >> other non-IP encapsulations. > > [RP] Answered that one to Joel. > >> >> 2. If I understand correctly, there is a blatant layering violation. In >> fact, the IP TTL will be decremented by both SFF functions and also by >> the routers delivering the IP/VxLAN packets between IP end-points. E.g., >> a single SFF-to-SFF hop could be up to 255 IP hops. > > [RP] This is not clear but a good point for more discussion. > >> >> 3. If an SF does not decrement the path index, I see that as a bug in SF >> implementation, not a misconfiguration. >> So I don't think the slides 5 or 6 cases need to be handled. > > > [RP] Yes, it is a bug but should you protect the network or not? We know > that a high speed loop will make the network crawl and crash. > >> >> >> I do see that loops between SFFs (slide 3) are a real problem caused by >> misconfiguration of SFF forwarding tables, due to buggy orchestration. >> >> What is a best-practice for solving such problems with an SDN mind-set? >> Clearly it is possible to (mis)configure OpenFlow switches to create an >> infinite packet loop. >> Is it expected to drop a packet passing too many hops, or merely to >> detect a problem? > > > [RP] All good points, the purpose of the presentation was to foster this > discussion and see what we can do (or suggest should be done) about it > >> >> >> -Dave >> >> >> >> -----Original Message----- >> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >> Sent: Thursday, October 22, 2015 1:36 PM >> To: Reinaldo Penno (repenno); sfc@ietf.org >> Subject: Re: [sfc] NSH Loop Prevention >> >> The description of the problem makes me wonder if we are decrementing >> the SFP ID in the wrong place. In terms of my implementation, it is >> helpful to have the SF do the decrementing. But most of these problems >> disappear if the SFF is responsible for the decrementing. >> >> I also have concerns with the material on slides 3 and 5. The >> disucssion in slide 3 assumes that the outer encaps is IP, and it >> assumes that the TTL on the outgoing transport header is related to the >> TTL on the incoming transport header. But there is no reason for there >> to be a relationship. A perfectly valid implementation strips >> transport, looks at NSH, then generates transport. If SFF do not >> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >> loop results. >> >> Slide 5 assumes that the SFF knows, when processing a received packet >>from an SF, what the index was when it sent the packet to the SF. Even >> in the case where the outbound processing SFF is the inbound processing >> SFF, there is no reason it should have saved that state, and the assumed >> packet matching is neither obvious nor simple. >> >> Yours, >> Joel >> >> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>> Hello fellow SFCers, >>> >>> wanted to share implementation experience on NSH Loop prevention topic. >>> I might write a draft about this during/after the IETF but a >>> presentation seems fine at this point. This is not really exhaustive, >>> just a summary to gauge interest on the topic. >>> >>> https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D0 >>> >>> Thanks, >>> >>> -RP >>> >>> >>> >>> _______________________________________________ >>> sfc mailing list >>> sfc@ietf.org >>> https://www.ietf.org/mailman/listinfo/sfc >>> >> >> _______________________________________________ >> sfc mailing list >> sfc@ietf.org >> https://www.ietf.org/mailman/listinfo/sfc > > From nobody Thu Oct 22 12:07:39 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C93671B3C32 for ; Thu, 22 Oct 2015 12:07:37 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id PIe3Zbx1p1z8 for ; Thu, 22 Oct 2015 12:07:35 -0700 (PDT) Received: from alln-iport-7.cisco.com (alln-iport-7.cisco.com [173.37.142.94]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B2DE11B3C05 for ; Thu, 22 Oct 2015 12:07:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=5290; q=dns/txt; s=iport; t=1445540855; x=1446750455; h=from:to:subject:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=H4mR23Rkjz2Og1f5rK0Lzk3bkvvMMj+ZG+0+h3sti5w=; b=RW1EK8h7r3xGGY+3doht3hLj3D5IRBjkfqSy7YURSVlTPfioVxZO0mae 8G+poBsfBC00flKeISyxa9TshCDt/cFK2x1n/z8iHGHsFS3vPDOPm/P9R O1lZvQuOTIB9mzh9Mg2cKhXvhwIivNSYuXAMxbdmw1QXHrBtoV3qbyUXv 8=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D1AQCqMylW/4oNJK1egzZUbwa+GwENgVkXCoV8AoFLOBQBAQEBAQEBgQqELgEBAQQBAQE3LQcEEwQCAQgOAwQBAQEeCQcnCxQJCAIEARIbiBUNuB2NIAEBAQEBAQEBAQEBAQEBAQEBAQEBARQEhneEfoRaOgaEKAWWKwGNHYFYll6DbwEfAQFChANyAYU8gQYBAQE X-IronPort-AV: E=Sophos;i="5.20,184,1444694400"; d="scan'208";a="200739141" Received: from alln-core-5.cisco.com ([173.36.13.138]) by alln-iport-7.cisco.com with ESMTP; 22 Oct 2015 19:07:21 +0000 Received: from XCH-ALN-009.cisco.com (xch-aln-009.cisco.com [173.36.7.19]) by alln-core-5.cisco.com (8.14.5/8.14.5) with ESMTP id t9MJ7LnC014023 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Thu, 22 Oct 2015 19:07:21 GMT Received: from xch-rcd-009.cisco.com (173.37.102.19) by XCH-ALN-009.cisco.com (173.36.7.19) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Thu, 22 Oct 2015 14:07:00 -0500 Received: from xch-rcd-009.cisco.com ([173.37.102.19]) by XCH-RCD-009.cisco.com ([173.37.102.19]) with mapi id 15.00.1104.000; Thu, 22 Oct 2015 14:07:01 -0500 From: "Reinaldo Penno (repenno)" To: Dave Dolson , "Joel M. Halpern" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AIAAd2SAgAAHJ4D//48zgA== Date: Thu, 22 Oct 2015 19:07:00 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.5.4.150722 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.232.244] Content-Type: text/plain; charset="us-ascii" Content-ID: <874996812F7B8041B28E4A8332AD9F48@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 19:07:38 -0000 Yep, it would simplify things, but requires a change to the current proposed protocol.=20 On 10/22/15, 11:51 AM, "Dave Dolson" wrote: >It occurs to me that *both* SFFs and SFs could decrement the Path Index. >This makes the longest path to be 127 vs. 255. >But the packet would never be placed on the network with the same index >twice. > > >I came to my point about not handling bugs by analogy: >- if we have routers that do not decrement TTL, there can be loops. But >we don't add another mechanism on top to detect if such buggy routers >exist. > > > >-----Original Message----- >From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >Sent: Thursday, October 22, 2015 2:25 PM >To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org >Subject: Re: [sfc] NSH Loop Prevention > >In case it was unclear, I very much appreciate your raising the points. > >I am concerned that we probably need a systemic approach to solving the >SFF forwarding loop problem. Solutions which depend upon the >combination of transport protocol behaviors and unspecified mechanisms >in the SFF (such as relating incoming and outgoing transport TTLs) would >seem to indicate that we have an incomplete specification. > >Yours, >Joel > >On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >> >> >> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >> >>> To add to Joel's comments, (which I agree with), >>> >>> 1. This isn't a solution for NSH carried directly in an Ethernet frame >>>or >>> other non-IP encapsulations. >> >> [RP] Answered that one to Joel. >> >>> >>> 2. If I understand correctly, there is a blatant layering violation. In >>> fact, the IP TTL will be decremented by both SFF functions and also by >>> the routers delivering the IP/VxLAN packets between IP end-points. >>>E.g., >>> a single SFF-to-SFF hop could be up to 255 IP hops. >> >> [RP] This is not clear but a good point for more discussion. >> >>> >>> 3. If an SF does not decrement the path index, I see that as a bug in >>>SF >>> implementation, not a misconfiguration. >>> So I don't think the slides 5 or 6 cases need to be handled. >> >> >> [RP] Yes, it is a bug but should you protect the network or not? We know >> that a high speed loop will make the network crawl and crash. >> >>> >>> >>> I do see that loops between SFFs (slide 3) are a real problem caused by >>> misconfiguration of SFF forwarding tables, due to buggy orchestration. >>> >>> What is a best-practice for solving such problems with an SDN mind-set? >>> Clearly it is possible to (mis)configure OpenFlow switches to create an >>> infinite packet loop. >>> Is it expected to drop a packet passing too many hops, or merely to >>> detect a problem? >> >> >> [RP] All good points, the purpose of the presentation was to foster this >> discussion and see what we can do (or suggest should be done) about it >> >>> >>> >>> -Dave >>> >>> >>> >>> -----Original Message----- >>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >>> Sent: Thursday, October 22, 2015 1:36 PM >>> To: Reinaldo Penno (repenno); sfc@ietf.org >>> Subject: Re: [sfc] NSH Loop Prevention >>> >>> The description of the problem makes me wonder if we are decrementing >>> the SFP ID in the wrong place. In terms of my implementation, it is >>> helpful to have the SF do the decrementing. But most of these problems >>> disappear if the SFF is responsible for the decrementing. >>> >>> I also have concerns with the material on slides 3 and 5. The >>> disucssion in slide 3 assumes that the outer encaps is IP, and it >>> assumes that the TTL on the outgoing transport header is related to the >>> TTL on the incoming transport header. But there is no reason for there >>> to be a relationship. A perfectly valid implementation strips >>> transport, looks at NSH, then generates transport. If SFF do not >>> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >>> loop results. >>> >>> Slide 5 assumes that the SFF knows, when processing a received packet >>>from an SF, what the index was when it sent the packet to the SF. Even >>> in the case where the outbound processing SFF is the inbound processing >>> SFF, there is no reason it should have saved that state, and the >>>assumed >>> packet matching is neither obvious nor simple. >>> >>> Yours, >>> Joel >>> >>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>> Hello fellow SFCers, >>>> >>>> wanted to share implementation experience on NSH Loop prevention >>>>topic. >>>> I might write a draft about this during/after the IETF but a >>>> presentation seems fine at this point. This is not really exhaustive, >>>> just a summary to gauge interest on the topic. >>>> >>>>=20 >>>>https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D0 >>>> >>>> Thanks, >>>> >>>> -RP >>>> >>>> >>>> >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>>> >>> >>> _______________________________________________ >>> sfc mailing list >>> sfc@ietf.org >>> https://www.ietf.org/mailman/listinfo/sfc >> >> From nobody Thu Oct 22 12:11:03 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 777E91B3C9E for ; Thu, 22 Oct 2015 12:11:02 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zwRUHR7fiIDQ for ; Thu, 22 Oct 2015 12:11:00 -0700 (PDT) Received: from rcdn-iport-9.cisco.com (rcdn-iport-9.cisco.com [173.37.86.80]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 64B741B3C9A for ; Thu, 22 Oct 2015 12:10:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=6242; q=dns/txt; s=iport; t=1445541048; x=1446750648; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=nb5/urQJUiH7Icmwq3HPxP4B0yn30nTvIuXZwaUuHyU=; b=H94JrikdCJgLUemsmVxjZs5byVJVoDTvut2N8y0B64xEt77GBWyC1J8h sO4ubq6CjkFJcurEcy3X3bw1IO8FfpXIYYqn8etdA875T+xW6VMfxxpju SM2foEd45UtLhI1oKtyJiR7t4SGf5R4COFkyUGbwyeQRZnomIFxfGUt1e k=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D2AQApNClW/40NJK1egzZUbwa+GwENgVkXCoV8AoFLOBQBAQEBAQEBgQqELgEBAQMBAQEBNy0HBAcFBwQCAQgOAwQBAQEeCQcnCxQJCAIEDgUbiA0IDbggjSABAQEBAQEBAQEBAQEBAQEBAQEBAQEUBIkHgm6EWjMHBoQoBZYrAY0dgViWXoNvAR8BAUKEA3IBhTyBBgEBAQ X-IronPort-AV: E=Sophos;i="5.20,184,1444694400"; d="scan'208";a="38173722" Received: from alln-core-8.cisco.com ([173.36.13.141]) by rcdn-iport-9.cisco.com with ESMTP; 22 Oct 2015 19:10:47 +0000 Received: from XCH-RCD-006.cisco.com (xch-rcd-006.cisco.com [173.37.102.16]) by alln-core-8.cisco.com (8.14.5/8.14.5) with ESMTP id t9MJAl84005095 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Thu, 22 Oct 2015 19:10:47 GMT Received: from xch-aln-012.cisco.com (173.36.7.22) by XCH-RCD-006.cisco.com (173.37.102.16) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Thu, 22 Oct 2015 14:10:26 -0500 Received: from xch-aln-012.cisco.com ([173.36.7.22]) by XCH-ALN-012.cisco.com ([173.36.7.22]) with mapi id 15.00.1104.000; Thu, 22 Oct 2015 14:10:26 -0500 From: "Richard Johnson (raj)" To: Dave Dolson Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AIAAd2SAgAAHJ4CAAAWDgA== Date: Thu, 22 Oct 2015 19:10:26 +0000 Message-ID: <7167AD78-CCE7-431A-8D37-613788090200@cisco.com> References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.32.254.180] Content-Type: text/plain; charset="us-ascii" Content-ID: <939A45C44DD9DA4BAB19A52C06AD3841@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Cc: "Joel M. Halpern" , "Reinaldo Penno \(repenno\)" , "sfc@ietf.org" Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 19:11:02 -0000 Having the SFF decrement the index when passing to another SFF would seem t= o be a non-backward-compatible change to the protocol, but it would be usef= ul for detecting loops in this situation. Another thing it would allow would be the creation of one service-chain, wh= ich could then be downloaded to all SFFs. Decrementing when passing to SFF: Index Node 255 SF-a 254 SF-b 253 SFF-2 252 SF-c 251 SFF-3 250 SF-d 249 terminate Not decrementing when passing to SFF requires separate tables: Index Node SFF-1: 255 SF-a 254 SF-b 253 SFF-2 SFF-2: 253 SF-c 252 SFF-3 SFF-3: 252 SF-d 250 terminate /raj > On Oct 22, 2015, at 11:51 AM, Dave Dolson wrote: >=20 > It occurs to me that *both* SFFs and SFs could decrement the Path Index. > This makes the longest path to be 127 vs. 255. > But the packet would never be placed on the network with the same index t= wice. >=20 >=20 > I came to my point about not handling bugs by analogy:=20 > - if we have routers that do not decrement TTL, there can be loops. But w= e don't add another mechanism on top to detect if such buggy routers exist. >=20 >=20 >=20 > -----Original Message----- > From: Joel M. Halpern [mailto:jmh@joelhalpern.com]=20 > Sent: Thursday, October 22, 2015 2:25 PM > To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org > Subject: Re: [sfc] NSH Loop Prevention >=20 > In case it was unclear, I very much appreciate your raising the points. >=20 > I am concerned that we probably need a systemic approach to solving the=20 > SFF forwarding loop problem. Solutions which depend upon the=20 > combination of transport protocol behaviors and unspecified mechanisms=20 > in the SFF (such as relating incoming and outgoing transport TTLs) would= =20 > seem to indicate that we have an incomplete specification. >=20 > Yours, > Joel >=20 > On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >>=20 >>=20 >> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >>=20 >>> To add to Joel's comments, (which I agree with), >>>=20 >>> 1. This isn't a solution for NSH carried directly in an Ethernet frame = or >>> other non-IP encapsulations. >>=20 >> [RP] Answered that one to Joel. >>=20 >>>=20 >>> 2. If I understand correctly, there is a blatant layering violation. In >>> fact, the IP TTL will be decremented by both SFF functions and also by >>> the routers delivering the IP/VxLAN packets between IP end-points. E.g.= , >>> a single SFF-to-SFF hop could be up to 255 IP hops. >>=20 >> [RP] This is not clear but a good point for more discussion. >>=20 >>>=20 >>> 3. If an SF does not decrement the path index, I see that as a bug in S= F >>> implementation, not a misconfiguration. >>> So I don't think the slides 5 or 6 cases need to be handled. >>=20 >>=20 >> [RP] Yes, it is a bug but should you protect the network or not? We know >> that a high speed loop will make the network crawl and crash. >>=20 >>>=20 >>>=20 >>> I do see that loops between SFFs (slide 3) are a real problem caused by >>> misconfiguration of SFF forwarding tables, due to buggy orchestration. >>>=20 >>> What is a best-practice for solving such problems with an SDN mind-set? >>> Clearly it is possible to (mis)configure OpenFlow switches to create an >>> infinite packet loop. >>> Is it expected to drop a packet passing too many hops, or merely to >>> detect a problem? >>=20 >>=20 >> [RP] All good points, the purpose of the presentation was to foster this >> discussion and see what we can do (or suggest should be done) about it >>=20 >>>=20 >>>=20 >>> -Dave >>>=20 >>>=20 >>>=20 >>> -----Original Message----- >>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >>> Sent: Thursday, October 22, 2015 1:36 PM >>> To: Reinaldo Penno (repenno); sfc@ietf.org >>> Subject: Re: [sfc] NSH Loop Prevention >>>=20 >>> The description of the problem makes me wonder if we are decrementing >>> the SFP ID in the wrong place. In terms of my implementation, it is >>> helpful to have the SF do the decrementing. But most of these problems >>> disappear if the SFF is responsible for the decrementing. >>>=20 >>> I also have concerns with the material on slides 3 and 5. The >>> disucssion in slide 3 assumes that the outer encaps is IP, and it >>> assumes that the TTL on the outgoing transport header is related to the >>> TTL on the incoming transport header. But there is no reason for there >>> to be a relationship. A perfectly valid implementation strips >>> transport, looks at NSH, then generates transport. If SFF do not >>> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >>> loop results. >>>=20 >>> Slide 5 assumes that the SFF knows, when processing a received packet >>> from an SF, what the index was when it sent the packet to the SF. Even >>> in the case where the outbound processing SFF is the inbound processing >>> SFF, there is no reason it should have saved that state, and the assume= d >>> packet matching is neither obvious nor simple. >>>=20 >>> Yours, >>> Joel >>>=20 >>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>> Hello fellow SFCers, >>>>=20 >>>> wanted to share implementation experience on NSH Loop prevention topic= . >>>> I might write a draft about this during/after the IETF but a >>>> presentation seems fine at this point. This is not really exhaustive, >>>> just a summary to gauge interest on the topic. >>>>=20 >>>> https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D0 >>>>=20 >>>> Thanks, >>>>=20 >>>> -RP >>>>=20 >>>>=20 >>>>=20 >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>>>=20 >>>=20 >>> _______________________________________________ >>> sfc mailing list >>> sfc@ietf.org >>> https://www.ietf.org/mailman/listinfo/sfc >>=20 >>=20 >=20 > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc From nobody Thu Oct 22 12:21:10 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8CBDA1B3D7E for ; Thu, 22 Oct 2015 12:21:09 -0700 (PDT) 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=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yRZWLvHiymgh for ; Thu, 22 Oct 2015 12:21:07 -0700 (PDT) Received: from mail1.sandvine.com (Mail1.sandvine.com [64.7.137.134]) by ietfa.amsl.com (Postfix) with ESMTP id 5F04F1B3D79 for ; Thu, 22 Oct 2015 12:21:07 -0700 (PDT) Received: from BLR-EXCHP-2.sandvine.com (192.168.196.172) by WTL-EXCHP-2.sandvine.com (192.168.194.177) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 22 Oct 2015 15:21:09 -0400 Received: from WTL-EXCHP-2.sandvine.com ([fe80::68ac:f071:19ff:3455]) by blr-exchp-2.sandvine.com ([fe80::6c6d:7108:c63c:9055%14]) with mapi id 14.03.0181.006; Thu, 22 Oct 2015 15:21:06 -0400 From: Dave Dolson To: "Reinaldo Penno (repenno)" , "Joel M. Halpern" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554CYKA///AVUCAAEthAIAAAh6A///CL9CAAElwAP//wB4g Date: Thu, 22 Oct 2015 19:21:07 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.200.63] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 19:21:09 -0000 I think it is backwards compatible at the NSH specification; however the c= ontrol-plane would need to know which SFFs do the decrement. - the SFs are unaffected - SFFs look up incoming coordinates in table and forward (some classes of S= FF might decrement). -----Original Message----- From: Reinaldo Penno (repenno) [mailto:repenno@cisco.com]=20 Sent: Thursday, October 22, 2015 3:07 PM To: Dave Dolson; Joel M. Halpern; sfc@ietf.org Subject: Re: [sfc] NSH Loop Prevention Yep, it would simplify things, but requires a change to the current proposed protocol.=20 On 10/22/15, 11:51 AM, "Dave Dolson" wrote: >It occurs to me that *both* SFFs and SFs could decrement the Path Index. >This makes the longest path to be 127 vs. 255. >But the packet would never be placed on the network with the same index >twice. > > >I came to my point about not handling bugs by analogy: >- if we have routers that do not decrement TTL, there can be loops. But >we don't add another mechanism on top to detect if such buggy routers >exist. > > > >-----Original Message----- >From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >Sent: Thursday, October 22, 2015 2:25 PM >To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org >Subject: Re: [sfc] NSH Loop Prevention > >In case it was unclear, I very much appreciate your raising the points. > >I am concerned that we probably need a systemic approach to solving the >SFF forwarding loop problem. Solutions which depend upon the >combination of transport protocol behaviors and unspecified mechanisms >in the SFF (such as relating incoming and outgoing transport TTLs) would >seem to indicate that we have an incomplete specification. > >Yours, >Joel > >On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >> >> >> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >> >>> To add to Joel's comments, (which I agree with), >>> >>> 1. This isn't a solution for NSH carried directly in an Ethernet frame >>>or >>> other non-IP encapsulations. >> >> [RP] Answered that one to Joel. >> >>> >>> 2. If I understand correctly, there is a blatant layering violation. In >>> fact, the IP TTL will be decremented by both SFF functions and also by >>> the routers delivering the IP/VxLAN packets between IP end-points. >>>E.g., >>> a single SFF-to-SFF hop could be up to 255 IP hops. >> >> [RP] This is not clear but a good point for more discussion. >> >>> >>> 3. If an SF does not decrement the path index, I see that as a bug in >>>SF >>> implementation, not a misconfiguration. >>> So I don't think the slides 5 or 6 cases need to be handled. >> >> >> [RP] Yes, it is a bug but should you protect the network or not? We know >> that a high speed loop will make the network crawl and crash. >> >>> >>> >>> I do see that loops between SFFs (slide 3) are a real problem caused by >>> misconfiguration of SFF forwarding tables, due to buggy orchestration. >>> >>> What is a best-practice for solving such problems with an SDN mind-set? >>> Clearly it is possible to (mis)configure OpenFlow switches to create an >>> infinite packet loop. >>> Is it expected to drop a packet passing too many hops, or merely to >>> detect a problem? >> >> >> [RP] All good points, the purpose of the presentation was to foster this >> discussion and see what we can do (or suggest should be done) about it >> >>> >>> >>> -Dave >>> >>> >>> >>> -----Original Message----- >>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >>> Sent: Thursday, October 22, 2015 1:36 PM >>> To: Reinaldo Penno (repenno); sfc@ietf.org >>> Subject: Re: [sfc] NSH Loop Prevention >>> >>> The description of the problem makes me wonder if we are decrementing >>> the SFP ID in the wrong place. In terms of my implementation, it is >>> helpful to have the SF do the decrementing. But most of these problems >>> disappear if the SFF is responsible for the decrementing. >>> >>> I also have concerns with the material on slides 3 and 5. The >>> disucssion in slide 3 assumes that the outer encaps is IP, and it >>> assumes that the TTL on the outgoing transport header is related to the >>> TTL on the incoming transport header. But there is no reason for there >>> to be a relationship. A perfectly valid implementation strips >>> transport, looks at NSH, then generates transport. If SFF do not >>> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >>> loop results. >>> >>> Slide 5 assumes that the SFF knows, when processing a received packet >>>from an SF, what the index was when it sent the packet to the SF. Even >>> in the case where the outbound processing SFF is the inbound processing >>> SFF, there is no reason it should have saved that state, and the >>>assumed >>> packet matching is neither obvious nor simple. >>> >>> Yours, >>> Joel >>> >>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>> Hello fellow SFCers, >>>> >>>> wanted to share implementation experience on NSH Loop prevention >>>>topic. >>>> I might write a draft about this during/after the IETF but a >>>> presentation seems fine at this point. This is not really exhaustive, >>>> just a summary to gauge interest on the topic. >>>> >>>>=20 >>>>https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D0 >>>> >>>> Thanks, >>>> >>>> -RP >>>> >>>> >>>> >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>>> >>> >>> _______________________________________________ >>> sfc mailing list >>> sfc@ietf.org >>> https://www.ietf.org/mailman/listinfo/sfc >> >> From nobody Thu Oct 22 12:23:23 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C6A351B3DB7 for ; Thu, 22 Oct 2015 12:23:21 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.602 X-Spam-Level: X-Spam-Status: No, score=-2.602 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ECoQa8A8a4w3 for ; Thu, 22 Oct 2015 12:23:17 -0700 (PDT) Received: from mailb2.tigertech.net (mailb2.tigertech.net [208.80.4.154]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8DD101B3DB4 for ; Thu, 22 Oct 2015 12:23:17 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mailb2.tigertech.net (Postfix) with ESMTP id 4945F8607C3; Thu, 22 Oct 2015 12:23:17 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at b2.tigertech.net Received: from Joels-MacBook-Pro.local (209-255-163-147.ip.mcleodusa.net [209.255.163.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailb2.tigertech.net (Postfix) with ESMTPSA id B6A3F1C00A0; Thu, 22 Oct 2015 12:23:16 -0700 (PDT) To: Dave Dolson , "Reinaldo Penno (repenno)" , "Joel M. Halpern" , "sfc@ietf.org" References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> From: Joel Halpern Direct Message-ID: <562937A3.3090707@joelhalpern.com> Date: Thu, 22 Oct 2015 15:23:15 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 19:23:22 -0000 Why does it matter if it is backwards compatible or not? The working group still owns the specification. There is no RFC. And even if there were, if we found a problem, we would have to fix it. Yours, Joel On 10/22/15 3:21 PM, Dave Dolson wrote: > I think it is backwards compatible at the NSH specification; however the control-plane would need to know which SFFs do the decrement. > - the SFs are unaffected > - SFFs look up incoming coordinates in table and forward (some classes of SFF might decrement). > > > -----Original Message----- > From: Reinaldo Penno (repenno) [mailto:repenno@cisco.com] > Sent: Thursday, October 22, 2015 3:07 PM > To: Dave Dolson; Joel M. Halpern; sfc@ietf.org > Subject: Re: [sfc] NSH Loop Prevention > > Yep, it would simplify things, but requires a change to the current > proposed protocol. > From nobody Thu Oct 22 12:25:46 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B1B0D1B3DD3 for ; Thu, 22 Oct 2015 12:25:44 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IKMTpjltIu1B for ; Thu, 22 Oct 2015 12:25:42 -0700 (PDT) Received: from alln-iport-5.cisco.com (alln-iport-5.cisco.com [173.37.142.92]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8F3231B3DD0 for ; Thu, 22 Oct 2015 12:25:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=6274; q=dns/txt; s=iport; t=1445541943; x=1446751543; h=from:to:subject:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=ztkYjehcY1A3Jhz3oOkgQPRXNQhJa9MN09d4i+FTM1E=; b=hCE0GC4d5Eg8v4DDIb8WVkTiQC7wSz6j75JgRIXNxfAEQm0ttsjmA6Tr NV2Imh1pFD6DrfBbTB76/SGFMipkMasutddR9XZ4WHkMaiWyxztz/eqXG +eY43xyV90XYKwReSY3zGc9SU5+IQDnaEkSDow0nBcUvSOlPeAIwI+/Mn 8=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D1AQDsNilW/4sNJK1egzZUbwa+GwENgVkXCoV8AoFLOBQBAQEBAQEBgQqELgEBAQQBAQE3LQcEEwQCAQgOAwQBAQEeCQcnCxQJCAIEARIbiBUNuByNIQEBAQEBAQEBAQEBAQEBAQEBAQEBARQEhneEfoRaOgaEKAWWKwGNHYFYhD+SH4NvAR8BAUKEA3IBhTyBBgEBAQ X-IronPort-AV: E=Sophos;i="5.20,184,1444694400"; d="scan'208";a="200642814" Received: from alln-core-6.cisco.com ([173.36.13.139]) by alln-iport-5.cisco.com with ESMTP; 22 Oct 2015 19:25:42 +0000 Received: from XCH-RCD-008.cisco.com (xch-rcd-008.cisco.com [173.37.102.18]) by alln-core-6.cisco.com (8.14.5/8.14.5) with ESMTP id t9MJPfO5009608 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Thu, 22 Oct 2015 19:25:41 GMT Received: from xch-rcd-009.cisco.com (173.37.102.19) by XCH-RCD-008.cisco.com (173.37.102.18) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Thu, 22 Oct 2015 14:25:21 -0500 Received: from xch-rcd-009.cisco.com ([173.37.102.19]) by XCH-RCD-009.cisco.com ([173.37.102.19]) with mapi id 15.00.1104.000; Thu, 22 Oct 2015 14:25:21 -0500 From: "Reinaldo Penno (repenno)" To: Dave Dolson , "Joel M. Halpern" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AIAAd2SAgAAHJ4D//48zgIAAeTaA//+L64A= Date: Thu, 22 Oct 2015 19:25:21 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.5.4.150722 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.232.244] Content-Type: text/plain; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 19:25:44 -0000 On 10/22/15, 12:21 PM, "Dave Dolson" wrote: >I think it is backwards compatible at the NSH specification; however the >control-plane would need to know which SFFs do the decrement. >- the SFs are unaffected >- SFFs look up incoming coordinates in table and forward (some classes of >SFF might decrement). [RP] Oh, please, no, no. All SFFs would need to decrement otherwise we would be worse off than when we started this discussion. We would have two code paths, two test suites two types of chains, etc. > > >-----Original Message----- >From: Reinaldo Penno (repenno) [mailto:repenno@cisco.com] >Sent: Thursday, October 22, 2015 3:07 PM >To: Dave Dolson; Joel M. Halpern; sfc@ietf.org >Subject: Re: [sfc] NSH Loop Prevention > >Yep, it would simplify things, but requires a change to the current >proposed protocol. > >On 10/22/15, 11:51 AM, "Dave Dolson" wrote: > >>It occurs to me that *both* SFFs and SFs could decrement the Path Index. >>This makes the longest path to be 127 vs. 255. >>But the packet would never be placed on the network with the same index >>twice. >> >> >>I came to my point about not handling bugs by analogy: >>- if we have routers that do not decrement TTL, there can be loops. But >>we don't add another mechanism on top to detect if such buggy routers >>exist. >> >> >> >>-----Original Message----- >>From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >>Sent: Thursday, October 22, 2015 2:25 PM >>To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org >>Subject: Re: [sfc] NSH Loop Prevention >> >>In case it was unclear, I very much appreciate your raising the points. >> >>I am concerned that we probably need a systemic approach to solving the >>SFF forwarding loop problem. Solutions which depend upon the >>combination of transport protocol behaviors and unspecified mechanisms >>in the SFF (such as relating incoming and outgoing transport TTLs) would >>seem to indicate that we have an incomplete specification. >> >>Yours, >>Joel >> >>On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >>> >>> >>> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >>> >>>> To add to Joel's comments, (which I agree with), >>>> >>>> 1. This isn't a solution for NSH carried directly in an Ethernet frame >>>>or >>>> other non-IP encapsulations. >>> >>> [RP] Answered that one to Joel. >>> >>>> >>>> 2. If I understand correctly, there is a blatant layering violation. >>>>In >>>> fact, the IP TTL will be decremented by both SFF functions and also by >>>> the routers delivering the IP/VxLAN packets between IP end-points. >>>>E.g., >>>> a single SFF-to-SFF hop could be up to 255 IP hops. >>> >>> [RP] This is not clear but a good point for more discussion. >>> >>>> >>>> 3. If an SF does not decrement the path index, I see that as a bug in >>>>SF >>>> implementation, not a misconfiguration. >>>> So I don't think the slides 5 or 6 cases need to be handled. >>> >>> >>> [RP] Yes, it is a bug but should you protect the network or not? We >>>know >>> that a high speed loop will make the network crawl and crash. >>> >>>> >>>> >>>> I do see that loops between SFFs (slide 3) are a real problem caused >>>>by >>>> misconfiguration of SFF forwarding tables, due to buggy orchestration. >>>> >>>> What is a best-practice for solving such problems with an SDN >>>>mind-set? >>>> Clearly it is possible to (mis)configure OpenFlow switches to create >>>>an >>>> infinite packet loop. >>>> Is it expected to drop a packet passing too many hops, or merely to >>>> detect a problem? >>> >>> >>> [RP] All good points, the purpose of the presentation was to foster >>>this >>> discussion and see what we can do (or suggest should be done) about it >>> >>>> >>>> >>>> -Dave >>>> >>>> >>>> >>>> -----Original Message----- >>>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >>>> Sent: Thursday, October 22, 2015 1:36 PM >>>> To: Reinaldo Penno (repenno); sfc@ietf.org >>>> Subject: Re: [sfc] NSH Loop Prevention >>>> >>>> The description of the problem makes me wonder if we are decrementing >>>> the SFP ID in the wrong place. In terms of my implementation, it is >>>> helpful to have the SF do the decrementing. But most of these >>>>problems >>>> disappear if the SFF is responsible for the decrementing. >>>> >>>> I also have concerns with the material on slides 3 and 5. The >>>> disucssion in slide 3 assumes that the outer encaps is IP, and it >>>> assumes that the TTL on the outgoing transport header is related to >>>>the >>>> TTL on the incoming transport header. But there is no reason for >>>>there >>>> to be a relationship. A perfectly valid implementation strips >>>> transport, looks at NSH, then generates transport. If SFF do not >>>> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >>>> loop results. >>>> >>>> Slide 5 assumes that the SFF knows, when processing a received packet >>>>from an SF, what the index was when it sent the packet to the SF. Even >>>> in the case where the outbound processing SFF is the inbound >>>>processing >>>> SFF, there is no reason it should have saved that state, and the >>>>assumed >>>> packet matching is neither obvious nor simple. >>>> >>>> Yours, >>>> Joel >>>> >>>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>>> Hello fellow SFCers, >>>>> >>>>> wanted to share implementation experience on NSH Loop prevention >>>>>topic. >>>>> I might write a draft about this during/after the IETF but a >>>>> presentation seems fine at this point. This is not really exhaustive, >>>>> just a summary to gauge interest on the topic. >>>>> >>>>>=20 >>>>>https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D >>>>>0 >>>>> >>>>> Thanks, >>>>> >>>>> -RP >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> sfc mailing list >>>>> sfc@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/sfc >>>>> >>>> >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>> >>> > From nobody Thu Oct 22 13:13:58 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BD2751B3FEC for ; Thu, 22 Oct 2015 13:13:56 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SxjlRUxTyHD9 for ; Thu, 22 Oct 2015 13:13:54 -0700 (PDT) Received: from rcdn-iport-2.cisco.com (rcdn-iport-2.cisco.com [173.37.86.73]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id B937D1B3FE1 for ; Thu, 22 Oct 2015 13:13:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=5628; q=dns/txt; s=iport; t=1445544834; x=1446754434; h=from:to:subject:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=K8vaH+aATPg9FSGVNxMJUatXj4qLlCS8zTgx5Pf3/xA=; b=e+bqzZNaWYyNwlia4HALTfvmkOoIvWVfPJ3d3MkQpy6ndfgKndkqXHdo Gksebua+riLnbnDOVhh3t31klXvJNR58HAr2Htrse83hBz6ShMsW/Cx2w q1rBrhip4K7JVvqY5H0rtQoXvFE18niiEMFFW6itEWaf0X0cqT0OFZ6lF E=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D1AQArQylW/5JdJa1egzZUbwa+GwENgVkXCoV8AoFMOBQBAQEBAQEBgQqELgEBAQQBAQFkBwQTBAIBCA4DBAEBAScHJwsUCQgCBAESG4gVDbgtjRsBAQEBAQEBAQEBAQEBAQEBAQEBAQEUBIZ3hH6EWjoGhCgFjU2IXgGNHYFYll6DbwEfAQFChANyAYU8gQYBAQE X-IronPort-AV: E=Sophos;i="5.20,184,1444694400"; d="scan'208";a="43221712" Received: from rcdn-core-10.cisco.com ([173.37.93.146]) by rcdn-iport-2.cisco.com with ESMTP; 22 Oct 2015 20:13:37 +0000 Received: from XCH-RCD-009.cisco.com (xch-rcd-009.cisco.com [173.37.102.19]) by rcdn-core-10.cisco.com (8.14.5/8.14.5) with ESMTP id t9MKDbFj008138 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Thu, 22 Oct 2015 20:13:37 GMT Received: from xch-rcd-008.cisco.com (173.37.102.18) by XCH-RCD-009.cisco.com (173.37.102.19) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Thu, 22 Oct 2015 15:13:17 -0500 Received: from xch-rcd-008.cisco.com ([173.37.102.18]) by XCH-RCD-008.cisco.com ([173.37.102.18]) with mapi id 15.00.1104.000; Thu, 22 Oct 2015 15:13:16 -0500 From: "Jim Guichard (jguichar)" To: Dave Dolson , "Joel M. Halpern" , "Reinaldo Penno (repenno)" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AIAAd2SAgAAHJ4D//9QDgA== Date: Thu, 22 Oct 2015 20:13:16 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.4.7.141117 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.98.43.180] Content-Type: text/plain; charset="iso-8859-1" Content-ID: <616F1F1EB8B7014994C3E0A7BE6748DD@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 20:13:56 -0000 I disagree and for me decrementing index at SFF seriously complicates implementation. If the SFF decrements the index then you would have to keep track of =B3received" interface as otherwise how would an SFF know whether to forward to an SF, or decrement and forward to another SF or SFF? Jim On 10/22/15, 2:51 PM, "Dave Dolson" wrote: >It occurs to me that *both* SFFs and SFs could decrement the Path Index. >This makes the longest path to be 127 vs. 255. >But the packet would never be placed on the network with the same index >twice. > > >I came to my point about not handling bugs by analogy: >- if we have routers that do not decrement TTL, there can be loops. But >we don't add another mechanism on top to detect if such buggy routers >exist. > > > >-----Original Message----- >From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >Sent: Thursday, October 22, 2015 2:25 PM >To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org >Subject: Re: [sfc] NSH Loop Prevention > >In case it was unclear, I very much appreciate your raising the points. > >I am concerned that we probably need a systemic approach to solving the >SFF forwarding loop problem. Solutions which depend upon the >combination of transport protocol behaviors and unspecified mechanisms >in the SFF (such as relating incoming and outgoing transport TTLs) would >seem to indicate that we have an incomplete specification. > >Yours, >Joel > >On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >> >> >> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >> >>> To add to Joel's comments, (which I agree with), >>> >>> 1. This isn't a solution for NSH carried directly in an Ethernet frame >>>or >>> other non-IP encapsulations. >> >> [RP] Answered that one to Joel. >> >>> >>> 2. If I understand correctly, there is a blatant layering violation. In >>> fact, the IP TTL will be decremented by both SFF functions and also by >>> the routers delivering the IP/VxLAN packets between IP end-points. >>>E.g., >>> a single SFF-to-SFF hop could be up to 255 IP hops. >> >> [RP] This is not clear but a good point for more discussion. >> >>> >>> 3. If an SF does not decrement the path index, I see that as a bug in >>>SF >>> implementation, not a misconfiguration. >>> So I don't think the slides 5 or 6 cases need to be handled. >> >> >> [RP] Yes, it is a bug but should you protect the network or not? We know >> that a high speed loop will make the network crawl and crash. >> >>> >>> >>> I do see that loops between SFFs (slide 3) are a real problem caused by >>> misconfiguration of SFF forwarding tables, due to buggy orchestration. >>> >>> What is a best-practice for solving such problems with an SDN mind-set? >>> Clearly it is possible to (mis)configure OpenFlow switches to create an >>> infinite packet loop. >>> Is it expected to drop a packet passing too many hops, or merely to >>> detect a problem? >> >> >> [RP] All good points, the purpose of the presentation was to foster this >> discussion and see what we can do (or suggest should be done) about it >> >>> >>> >>> -Dave >>> >>> >>> >>> -----Original Message----- >>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >>> Sent: Thursday, October 22, 2015 1:36 PM >>> To: Reinaldo Penno (repenno); sfc@ietf.org >>> Subject: Re: [sfc] NSH Loop Prevention >>> >>> The description of the problem makes me wonder if we are decrementing >>> the SFP ID in the wrong place. In terms of my implementation, it is >>> helpful to have the SF do the decrementing. But most of these problems >>> disappear if the SFF is responsible for the decrementing. >>> >>> I also have concerns with the material on slides 3 and 5. The >>> disucssion in slide 3 assumes that the outer encaps is IP, and it >>> assumes that the TTL on the outgoing transport header is related to the >>> TTL on the incoming transport header. But there is no reason for there >>> to be a relationship. A perfectly valid implementation strips >>> transport, looks at NSH, then generates transport. If SFF do not >>> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >>> loop results. >>> >>> Slide 5 assumes that the SFF knows, when processing a received packet >>>from an SF, what the index was when it sent the packet to the SF. Even >>> in the case where the outbound processing SFF is the inbound processing >>> SFF, there is no reason it should have saved that state, and the >>>assumed >>> packet matching is neither obvious nor simple. >>> >>> Yours, >>> Joel >>> >>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>> Hello fellow SFCers, >>>> >>>> wanted to share implementation experience on NSH Loop prevention >>>>topic. >>>> I might write a draft about this during/after the IETF but a >>>> presentation seems fine at this point. This is not really exhaustive, >>>> just a summary to gauge interest on the topic. >>>> >>>>=20 >>>>https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D0 >>>> >>>> Thanks, >>>> >>>> -RP >>>> >>>> >>>> >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>>> >>> >>> _______________________________________________ >>> sfc mailing list >>> sfc@ietf.org >>> https://www.ietf.org/mailman/listinfo/sfc >> >> > >_______________________________________________ >sfc mailing list >sfc@ietf.org >https://www.ietf.org/mailman/listinfo/sfc From nobody Thu Oct 22 13:20:34 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id DE4E01B4084 for ; Thu, 22 Oct 2015 13:20:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.602 X-Spam-Level: X-Spam-Status: No, score=-2.602 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DF6xY5MiD6Y7 for ; Thu, 22 Oct 2015 13:20:28 -0700 (PDT) Received: from mailb2.tigertech.net (mailb2.tigertech.net [208.80.4.154]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EC7D61B407E for ; Thu, 22 Oct 2015 13:20:27 -0700 (PDT) Received: from localhost (localhost [127.0.0.1]) by mailb2.tigertech.net (Postfix) with ESMTP id C132AB201C0; Thu, 22 Oct 2015 13:20:27 -0700 (PDT) X-Virus-Scanned: Debian amavisd-new at b2.tigertech.net Received: from Joels-MacBook-Pro.local (209-255-163-147.ip.mcleodusa.net [209.255.163.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mailb2.tigertech.net (Postfix) with ESMTPSA id 2D292B201B5; Thu, 22 Oct 2015 13:20:27 -0700 (PDT) To: "Jim Guichard (jguichar)" , Dave Dolson , "Reinaldo Penno (repenno)" , "sfc@ietf.org" References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> From: "Joel M. Halpern" Message-ID: <5629450A.1090805@joelhalpern.com> Date: Thu, 22 Oct 2015 16:20:26 -0400 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 20:20:33 -0000 It seems to me that if SFF decrement then they should always decrement. Trying for hybrids seems more complex. At which point I do not see value in the SF decrementing. If the SFF always decrement, does that complicate your implementation? It does cause some difficulty for mine, but I am having trouble finding a better answer. Yours, Joel On 10/22/15 4:13 PM, Jim Guichard (jguichar) wrote: > I disagree and for me decrementing index at SFF seriously complicates > implementation. If the SFF decrements the index then you would have to > keep track of ³received" interface as otherwise how would an SFF know > whether to forward to an SF, or decrement and forward to another SF or SFF? > > Jim > > On 10/22/15, 2:51 PM, "Dave Dolson" wrote: > >> It occurs to me that *both* SFFs and SFs could decrement the Path Index. >> This makes the longest path to be 127 vs. 255. >> But the packet would never be placed on the network with the same index >> twice. >> >> >> I came to my point about not handling bugs by analogy: >> - if we have routers that do not decrement TTL, there can be loops. But >> we don't add another mechanism on top to detect if such buggy routers >> exist. >> >> >> >> -----Original Message----- >> From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >> Sent: Thursday, October 22, 2015 2:25 PM >> To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org >> Subject: Re: [sfc] NSH Loop Prevention >> >> In case it was unclear, I very much appreciate your raising the points. >> >> I am concerned that we probably need a systemic approach to solving the >> SFF forwarding loop problem. Solutions which depend upon the >> combination of transport protocol behaviors and unspecified mechanisms >> in the SFF (such as relating incoming and outgoing transport TTLs) would >> seem to indicate that we have an incomplete specification. >> >> Yours, >> Joel >> >> On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >>> >>> >>> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >>> >>>> To add to Joel's comments, (which I agree with), >>>> >>>> 1. This isn't a solution for NSH carried directly in an Ethernet frame >>>> or >>>> other non-IP encapsulations. >>> >>> [RP] Answered that one to Joel. >>> >>>> >>>> 2. If I understand correctly, there is a blatant layering violation. In >>>> fact, the IP TTL will be decremented by both SFF functions and also by >>>> the routers delivering the IP/VxLAN packets between IP end-points. >>>> E.g., >>>> a single SFF-to-SFF hop could be up to 255 IP hops. >>> >>> [RP] This is not clear but a good point for more discussion. >>> >>>> >>>> 3. If an SF does not decrement the path index, I see that as a bug in >>>> SF >>>> implementation, not a misconfiguration. >>>> So I don't think the slides 5 or 6 cases need to be handled. >>> >>> >>> [RP] Yes, it is a bug but should you protect the network or not? We know >>> that a high speed loop will make the network crawl and crash. >>> >>>> >>>> >>>> I do see that loops between SFFs (slide 3) are a real problem caused by >>>> misconfiguration of SFF forwarding tables, due to buggy orchestration. >>>> >>>> What is a best-practice for solving such problems with an SDN mind-set? >>>> Clearly it is possible to (mis)configure OpenFlow switches to create an >>>> infinite packet loop. >>>> Is it expected to drop a packet passing too many hops, or merely to >>>> detect a problem? >>> >>> >>> [RP] All good points, the purpose of the presentation was to foster this >>> discussion and see what we can do (or suggest should be done) about it >>> >>>> >>>> >>>> -Dave >>>> >>>> >>>> >>>> -----Original Message----- >>>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >>>> Sent: Thursday, October 22, 2015 1:36 PM >>>> To: Reinaldo Penno (repenno); sfc@ietf.org >>>> Subject: Re: [sfc] NSH Loop Prevention >>>> >>>> The description of the problem makes me wonder if we are decrementing >>>> the SFP ID in the wrong place. In terms of my implementation, it is >>>> helpful to have the SF do the decrementing. But most of these problems >>>> disappear if the SFF is responsible for the decrementing. >>>> >>>> I also have concerns with the material on slides 3 and 5. The >>>> disucssion in slide 3 assumes that the outer encaps is IP, and it >>>> assumes that the TTL on the outgoing transport header is related to the >>>> TTL on the incoming transport header. But there is no reason for there >>>> to be a relationship. A perfectly valid implementation strips >>>> transport, looks at NSH, then generates transport. If SFF do not >>>> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >>>> loop results. >>>> >>>> Slide 5 assumes that the SFF knows, when processing a received packet >>> >from an SF, what the index was when it sent the packet to the SF. Even >>>> in the case where the outbound processing SFF is the inbound processing >>>> SFF, there is no reason it should have saved that state, and the >>>> assumed >>>> packet matching is neither obvious nor simple. >>>> >>>> Yours, >>>> Joel >>>> >>>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>>> Hello fellow SFCers, >>>>> >>>>> wanted to share implementation experience on NSH Loop prevention >>>>> topic. >>>>> I might write a draft about this during/after the IETF but a >>>>> presentation seems fine at this point. This is not really exhaustive, >>>>> just a summary to gauge interest on the topic. >>>>> >>>>> >>>>> https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl=0 >>>>> >>>>> Thanks, >>>>> >>>>> -RP >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> sfc mailing list >>>>> sfc@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/sfc >>>>> >>>> >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>> >>> >> >> _______________________________________________ >> sfc mailing list >> sfc@ietf.org >> https://www.ietf.org/mailman/listinfo/sfc > > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc > From nobody Thu Oct 22 13:20:50 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8201E1B4085 for ; Thu, 22 Oct 2015 13:20:44 -0700 (PDT) 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=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id SJHYEkYnvtmm for ; Thu, 22 Oct 2015 13:20:36 -0700 (PDT) Received: from mail1.sandvine.com (Mail1.sandvine.com [64.7.137.134]) by ietfa.amsl.com (Postfix) with ESMTP id D69B71B408A for ; Thu, 22 Oct 2015 13:20:35 -0700 (PDT) Received: from BLR-EXCHP-2.sandvine.com (192.168.196.172) by WTL-EXCHP-2.sandvine.com (192.168.194.177) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 22 Oct 2015 16:20:37 -0400 Received: from WTL-EXCHP-2.sandvine.com ([fe80::68ac:f071:19ff:3455]) by blr-exchp-2.sandvine.com ([fe80::6c6d:7108:c63c:9055%14]) with mapi id 14.03.0181.006; Thu, 22 Oct 2015 16:20:35 -0400 From: Dave Dolson To: "Jim Guichard (jguichar)" , "Joel M. Halpern" , "Reinaldo Penno (repenno)" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554CYKA///AVUCAAEthAIAAAh6A///CL9CAAFvzAP//vcFA Date: Thu, 22 Oct 2015 20:20:36 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.200.63] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 20:20:44 -0000 Obviously it would have to be clearly defined as to whether the incrementing happens before or after the next-hop lookup. But once that is clear, the next-hop of any received packet is precisely defined by the look-up table. And also, I think it is a solution to the loop prevention, solved within the NSH layer only. -----Original Message----- From: Jim Guichard (jguichar) [mailto:jguichar@cisco.com]=20 Sent: Thursday, October 22, 2015 4:13 PM To: Dave Dolson; Joel M. Halpern; Reinaldo Penno (repenno); sfc@ietf.org Subject: Re: [sfc] NSH Loop Prevention I disagree and for me decrementing index at SFF seriously complicates implementation. If the SFF decrements the index then you would have to keep track of =B3received" interface as otherwise how would an SFF know whether to forward to an SF, or decrement and forward to another SF or SFF? Jim On 10/22/15, 2:51 PM, "Dave Dolson" wrote: >It occurs to me that *both* SFFs and SFs could decrement the Path Index. >This makes the longest path to be 127 vs. 255. >But the packet would never be placed on the network with the same index >twice. > > >I came to my point about not handling bugs by analogy: >- if we have routers that do not decrement TTL, there can be loops. But >we don't add another mechanism on top to detect if such buggy routers >exist. > > > >-----Original Message----- >From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >Sent: Thursday, October 22, 2015 2:25 PM >To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org >Subject: Re: [sfc] NSH Loop Prevention > >In case it was unclear, I very much appreciate your raising the points. > >I am concerned that we probably need a systemic approach to solving the >SFF forwarding loop problem. Solutions which depend upon the >combination of transport protocol behaviors and unspecified mechanisms >in the SFF (such as relating incoming and outgoing transport TTLs) would >seem to indicate that we have an incomplete specification. > >Yours, >Joel > >On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >> >> >> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >> >>> To add to Joel's comments, (which I agree with), >>> >>> 1. This isn't a solution for NSH carried directly in an Ethernet frame >>>or >>> other non-IP encapsulations. >> >> [RP] Answered that one to Joel. >> >>> >>> 2. If I understand correctly, there is a blatant layering violation. In >>> fact, the IP TTL will be decremented by both SFF functions and also by >>> the routers delivering the IP/VxLAN packets between IP end-points. >>>E.g., >>> a single SFF-to-SFF hop could be up to 255 IP hops. >> >> [RP] This is not clear but a good point for more discussion. >> >>> >>> 3. If an SF does not decrement the path index, I see that as a bug in >>>SF >>> implementation, not a misconfiguration. >>> So I don't think the slides 5 or 6 cases need to be handled. >> >> >> [RP] Yes, it is a bug but should you protect the network or not? We know >> that a high speed loop will make the network crawl and crash. >> >>> >>> >>> I do see that loops between SFFs (slide 3) are a real problem caused by >>> misconfiguration of SFF forwarding tables, due to buggy orchestration. >>> >>> What is a best-practice for solving such problems with an SDN mind-set? >>> Clearly it is possible to (mis)configure OpenFlow switches to create an >>> infinite packet loop. >>> Is it expected to drop a packet passing too many hops, or merely to >>> detect a problem? >> >> >> [RP] All good points, the purpose of the presentation was to foster this >> discussion and see what we can do (or suggest should be done) about it >> >>> >>> >>> -Dave >>> >>> >>> >>> -----Original Message----- >>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >>> Sent: Thursday, October 22, 2015 1:36 PM >>> To: Reinaldo Penno (repenno); sfc@ietf.org >>> Subject: Re: [sfc] NSH Loop Prevention >>> >>> The description of the problem makes me wonder if we are decrementing >>> the SFP ID in the wrong place. In terms of my implementation, it is >>> helpful to have the SF do the decrementing. But most of these problems >>> disappear if the SFF is responsible for the decrementing. >>> >>> I also have concerns with the material on slides 3 and 5. The >>> disucssion in slide 3 assumes that the outer encaps is IP, and it >>> assumes that the TTL on the outgoing transport header is related to the >>> TTL on the incoming transport header. But there is no reason for there >>> to be a relationship. A perfectly valid implementation strips >>> transport, looks at NSH, then generates transport. If SFF do not >>> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >>> loop results. >>> >>> Slide 5 assumes that the SFF knows, when processing a received packet >>>from an SF, what the index was when it sent the packet to the SF. Even >>> in the case where the outbound processing SFF is the inbound processing >>> SFF, there is no reason it should have saved that state, and the >>>assumed >>> packet matching is neither obvious nor simple. >>> >>> Yours, >>> Joel >>> >>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>> Hello fellow SFCers, >>>> >>>> wanted to share implementation experience on NSH Loop prevention >>>>topic. >>>> I might write a draft about this during/after the IETF but a >>>> presentation seems fine at this point. This is not really exhaustive, >>>> just a summary to gauge interest on the topic. >>>> >>>>=20 >>>>https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D0 >>>> >>>> Thanks, >>>> >>>> -RP >>>> >>>> >>>> >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>>> >>> >>> _______________________________________________ >>> sfc mailing list >>> sfc@ietf.org >>> https://www.ietf.org/mailman/listinfo/sfc >> >> > >_______________________________________________ >sfc mailing list >sfc@ietf.org >https://www.ietf.org/mailman/listinfo/sfc From nobody Thu Oct 22 14:15:08 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2D7371B4211 for ; Thu, 22 Oct 2015 14:15:06 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fvz02rBnYu34 for ; Thu, 22 Oct 2015 14:15:04 -0700 (PDT) Received: from rcdn-iport-6.cisco.com (rcdn-iport-6.cisco.com [173.37.86.77]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D468F1B4213 for ; Thu, 22 Oct 2015 14:15:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=9308; q=dns/txt; s=iport; t=1445548503; x=1446758103; h=from:to:subject:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=ZaTVJFPTxkBIJnIFDbxCxvoWOsplvJlDUUeODbzhpkc=; b=GOYbWUpz4fUvWW1kCiWCl8Y9d0xFBoianqdLxQXmnI5r1yyrS2RFEFan vfAIvQTGZfB+8z36K/SDZ6Wqsi+exLOHVeas4PSnjV1tSca5tE2xSDguX nXoHaHPJvWRuuPFyExdqcIIf2nACp4NEsc4RwPu7Yk1iqSQHQcbgLOI9a 8=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D2AQBmUSlW/4QNJK1egzZUbwa+HAENgVkXCoV8AhyBMDgUAQEBAQEBAYEKhC4BAQEEAQEBMTMHBBMEAgEIDgMEAQEBBCMFAgIlCxQJCAIEARIbiBUNlQ6dLwaFXI0UAQEBAQEBAQEBAQEBAQEBAQEBAQEBFASBHIVbhH6EWhgiBoJdgUsFlisBjR2BWJZeg28BHwEBQoIRHYFVcgGFPIEGAQEB X-IronPort-AV: E=Sophos;i="5.20,184,1444694400"; d="scan'208";a="40166791" Received: from alln-core-10.cisco.com ([173.36.13.132]) by rcdn-iport-6.cisco.com with ESMTP; 22 Oct 2015 21:15:02 +0000 Received: from XCH-RCD-010.cisco.com (xch-rcd-010.cisco.com [173.37.102.20]) by alln-core-10.cisco.com (8.14.5/8.14.5) with ESMTP id t9MLF1bE013093 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Thu, 22 Oct 2015 21:15:02 GMT Received: from xch-rcd-009.cisco.com (173.37.102.19) by XCH-RCD-010.cisco.com (173.37.102.20) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Thu, 22 Oct 2015 16:14:41 -0500 Received: from xch-rcd-009.cisco.com ([173.37.102.19]) by XCH-RCD-009.cisco.com ([173.37.102.19]) with mapi id 15.00.1104.000; Thu, 22 Oct 2015 16:14:41 -0500 From: "Reinaldo Penno (repenno)" To: Dave Dolson , "Jim Guichard (jguichar)" , "Joel M. Halpern" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AIAAd2SAgAAHJ4D//9QDgIAARQQA//+Z2YA= Date: Thu, 22 Oct 2015 21:14:41 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.5.4.150722 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.49.24] Content-Type: text/plain; charset="euc-kr" Content-ID: <6A493E0510C9E144A7913B3BD0652F28@emea.cisco.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 21:15:06 -0000 SSBhZ3JlZSB3aXRoIEppbS4gVGhpcyBpcyBtdWNoIGVhc2llciBzYWlkIHRoYW4gZG9uZS4gIEp1 c3QgbG9vayBhcm91bmQNCmhvdyByb3V0ZXJzIGltcGxlbWVudCBkZWNyZW1lbnRpbmcgVFRMLg0K DQpTb21lIHJvdXRlcnMgdGhhdCBkZWNyZW1lbnQgb24gaW50ZXJmYWNlIGluZ3Jlc3MsICBvdGhl cnMgYWZ0ZXIgcm91dGUNCmxvb2t1cCwgb3IgaW50ZXJmYWNlIGVncmVzcywgYW5kIHNvbWV0aW1l cyBldmVuIG1vcmUgdGhhbiBvbmNlLiBBbGwNCnBvc3NpYmxlIHZhcmlhdGlvbnMuDQoNClRoYW5r cywNCg0KLVJQDQoNCk9uIDEwLzIyLzE1LCAxOjIwIFBNLCAiRGF2ZSBEb2xzb24iIDxkZG9sc29u QHNhbmR2aW5lLmNvbT4gd3JvdGU6DQoNCj5PYnZpb3VzbHkgaXQgd291bGQgaGF2ZSB0byBiZSBj bGVhcmx5IGRlZmluZWQgYXMgdG8gd2hldGhlciB0aGUNCj5pbmNyZW1lbnRpbmcgaGFwcGVucyBi ZWZvcmUgb3IgYWZ0ZXIgdGhlIG5leHQtaG9wIGxvb2t1cC4NCj5CdXQgb25jZSB0aGF0IGlzIGNs ZWFyLCB0aGUgbmV4dC1ob3Agb2YgYW55IHJlY2VpdmVkIHBhY2tldA0KPmlzIHByZWNpc2VseSBk ZWZpbmVkIGJ5IHRoZSBsb29rLXVwIHRhYmxlLg0KPg0KPkFuZCBhbHNvLCBJIHRoaW5rIGl0IGlz IGEgc29sdXRpb24gdG8gdGhlIGxvb3AgcHJldmVudGlvbiwgc29sdmVkDQo+d2l0aGluIHRoZSBO 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L3d3dy5pZXRmLm9yZy9tYWlsbWFuL2xpc3RpbmZvL3NmYw0KPj4+DQo+Pj4NCj4+DQo+Pl9fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fDQo+PnNmYyBtYWlsaW5n IGxpc3QNCj4+c2ZjQGlldGYub3JnDQo+Pmh0dHBzOi8vd3d3LmlldGYub3JnL21haWxtYW4vbGlz dGluZm8vc2ZjDQo+DQoNCg== From nobody Thu Oct 22 14:36:27 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C37D71B4296 for ; Thu, 22 Oct 2015 14:36:16 -0700 (PDT) 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=[BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id v3y_VcSQiOUt for ; Thu, 22 Oct 2015 14:36:11 -0700 (PDT) Received: from mail1.sandvine.com (Mail1.sandvine.com [64.7.137.134]) by ietfa.amsl.com (Postfix) with ESMTP id 48FD71B429B for ; Thu, 22 Oct 2015 14:34:40 -0700 (PDT) Received: from WTL-EXCHP-2.sandvine.com ([fe80::68ac:f071:19ff:3455]) by wtl-exchp-1.sandvine.com ([fe80::ac6b:cc1e:f2ff:93aa%18]) with mapi id 14.03.0195.001; Thu, 22 Oct 2015 17:34:34 -0400 From: Dave Dolson To: "Reinaldo Penno (repenno)" , "Jim Guichard (jguichar)" , "Joel M. Halpern" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554CYKA///AVUCAAEthAIAAAh6A///CL9CAAFvzAP//vcFAAAptF4D//8KIiQ== Date: Thu, 22 Oct 2015 21:34:41 +0000 Message-ID: <20151022213437.5697621.29491.42745@sandvine.com> References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> , In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: text/plain; charset="windows-1256" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 21:36:17 -0000 Don't the same questions (and more) exist =FDwith the VxLAN TTL approach? Original Message From: Reinaldo Penno (repenno) Sent: Thursday, October 22, 2015 5:15 PM To: Dave Dolson; Jim Guichard (jguichar); Joel M. Halpern; sfc@ietf.org Subject: Re: [sfc] NSH Loop Prevention I agree with Jim. This is much easier said than done. Just look around how routers implement decrementing TTL. Some routers that decrement on interface ingress, others after route lookup, or interface egress, and sometimes even more than once. All possible variations. Thanks, -RP On 10/22/15, 1:20 PM, "Dave Dolson" wrote: >Obviously it would have to be clearly defined as to whether the >incrementing happens before or after the next-hop lookup. >But once that is clear, the next-hop of any received packet >is precisely defined by the look-up table. > >And also, I think it is a solution to the loop prevention, solved >within the NSH layer only. > > > >-----Original Message----- >From: Jim Guichard (jguichar) [mailto:jguichar@cisco.com] >Sent: Thursday, October 22, 2015 4:13 PM >To: Dave Dolson; Joel M. Halpern; Reinaldo Penno (repenno); sfc@ietf.org >Subject: Re: [sfc] NSH Loop Prevention > >I disagree and for me decrementing index at SFF seriously complicates >implementation. If the SFF decrements the index then you would have to >keep track of =B3received" interface as otherwise how would an SFF know >whether to forward to an SF, or decrement and forward to another SF or >SFF? > >Jim > >On 10/22/15, 2:51 PM, "Dave Dolson" wrote: > >>It occurs to me that *both* SFFs and SFs could decrement the Path Index. >>This makes the longest path to be 127 vs. 255. >>But the packet would never be placed on the network with the same index >>twice. >> >> >>I came to my point about not handling bugs by analogy: >>- if we have routers that do not decrement TTL, there can be loops. But >>we don't add another mechanism on top to detect if such buggy routers >>exist. >> >> >> >>-----Original Message----- >>From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >>Sent: Thursday, October 22, 2015 2:25 PM >>To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org >>Subject: Re: [sfc] NSH Loop Prevention >> >>In case it was unclear, I very much appreciate your raising the points. >> >>I am concerned that we probably need a systemic approach to solving the >>SFF forwarding loop problem. Solutions which depend upon the >>combination of transport protocol behaviors and unspecified mechanisms >>in the SFF (such as relating incoming and outgoing transport TTLs) would >>seem to indicate that we have an incomplete specification. >> >>Yours, >>Joel >> >>On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >>> >>> >>> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >>> >>>> To add to Joel's comments, (which I agree with), >>>> >>>> 1. This isn't a solution for NSH carried directly in an Ethernet frame >>>>or >>>> other non-IP encapsulations. >>> >>> [RP] Answered that one to Joel. >>> >>>> >>>> 2. If I understand correctly, there is a blatant layering violation. >>>>In >>>> fact, the IP TTL will be decremented by both SFF functions and also by >>>> the routers delivering the IP/VxLAN packets between IP end-points. >>>>E.g., >>>> a single SFF-to-SFF hop could be up to 255 IP hops. >>> >>> [RP] This is not clear but a good point for more discussion. >>> >>>> >>>> 3. If an SF does not decrement the path index, I see that as a bug in >>>>SF >>>> implementation, not a misconfiguration. >>>> So I don't think the slides 5 or 6 cases need to be handled. >>> >>> >>> [RP] Yes, it is a bug but should you protect the network or not? We >>>know >>> that a high speed loop will make the network crawl and crash. >>> >>>> >>>> >>>> I do see that loops between SFFs (slide 3) are a real problem caused >>>>by >>>> misconfiguration of SFF forwarding tables, due to buggy orchestration. >>>> >>>> What is a best-practice for solving such problems with an SDN >>>>mind-set? >>>> Clearly it is possible to (mis)configure OpenFlow switches to create >>>>an >>>> infinite packet loop. >>>> Is it expected to drop a packet passing too many hops, or merely to >>>> detect a problem? >>> >>> >>> [RP] All good points, the purpose of the presentation was to foster >>>this >>> discussion and see what we can do (or suggest should be done) about it >>> >>>> >>>> >>>> -Dave >>>> >>>> >>>> >>>> -----Original Message----- >>>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >>>> Sent: Thursday, October 22, 2015 1:36 PM >>>> To: Reinaldo Penno (repenno); sfc@ietf.org >>>> Subject: Re: [sfc] NSH Loop Prevention >>>> >>>> The description of the problem makes me wonder if we are decrementing >>>> the SFP ID in the wrong place. In terms of my implementation, it is >>>> helpful to have the SF do the decrementing. But most of these >>>>problems >>>> disappear if the SFF is responsible for the decrementing. >>>> >>>> I also have concerns with the material on slides 3 and 5. The >>>> disucssion in slide 3 assumes that the outer encaps is IP, and it >>>> assumes that the TTL on the outgoing transport header is related to >>>>the >>>> TTL on the incoming transport header. But there is no reason for >>>>there >>>> to be a relationship. A perfectly valid implementation strips >>>> transport, looks at NSH, then generates transport. If SFF do not >>>> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >>>> loop results. >>>> >>>> Slide 5 assumes that the SFF knows, when processing a received packet >>>>from an SF, what the index was when it sent the packet to the SF. Even >>>> in the case where the outbound processing SFF is the inbound >>>>processing >>>> SFF, there is no reason it should have saved that state, and the >>>>assumed >>>> packet matching is neither obvious nor simple. >>>> >>>> Yours, >>>> Joel >>>> >>>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>>> Hello fellow SFCers, >>>>> >>>>> wanted to share implementation experience on NSH Loop prevention >>>>>topic. >>>>> I might write a draft about this during/after the IETF but a >>>>> presentation seems fine at this point. This is not really exhaustive, >>>>> just a summary to gauge interest on the topic. >>>>> >>>>> >>>>>https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D >>>>>0 >>>>> >>>>> Thanks, >>>>> >>>>> -RP >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> sfc mailing list >>>>> sfc@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/sfc >>>>> >>>> >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>> >>> >> >>_______________________________________________ >>sfc mailing list >>sfc@ietf.org >>https://www.ietf.org/mailman/listinfo/sfc > From nobody Thu Oct 22 14:36:47 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 042B71B42B5 for ; Thu, 22 Oct 2015 14:36:45 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2FXSzKaX3zUJ for ; Thu, 22 Oct 2015 14:36:40 -0700 (PDT) Received: from alln-iport-2.cisco.com (alln-iport-2.cisco.com [173.37.142.89]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C20481B42A5 for ; Thu, 22 Oct 2015 14:35:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=9430; q=dns/txt; s=iport; t=1445549721; x=1446759321; h=from:to:subject:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=jAlu4IniHKh5LbmNBDLYqmggA0BNkcNj8NHo628O/6A=; b=dI1NDXntPvxWtSKA3BdtJPS5x8qfqmfB6c277s35EtvFtCF7kYcC7my/ 9dvopF9CU1HMquygcI0m7n3d/Pba85Ac+l3O9AcjK9oEljtpMx5X5YwdJ sigvsc6Cjv5khvTUi/6/bv/QSjmNTcqEVLnQDnrW7zqi5TTJsOS6wIEoM s=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D2AQCkVSlW/4QNJK1egzZUbwa+HgENgVkXCoV8AhyBMDgUAQEBAQEBAYEKhC4BAQEEAQEBMTMHBBMEAgEIEQQBAQEEIwUCAiULFAkIAgQBEhuIFQ2VFp0vBoVcjRQBAQEBAQEBAQEBAQEBAQEBAQEBAQEUBIEchVuDeIEGhHIiBoJdgUsFlisBjR2BWJZeg28BHwEBQoQDcgGFPIEGAQEB X-IronPort-AV: E=Sophos;i="5.20,184,1444694400"; d="scan'208";a="199612441" Received: from alln-core-10.cisco.com ([173.36.13.132]) by alln-iport-2.cisco.com with ESMTP; 22 Oct 2015 21:35:21 +0000 Received: from XCH-RCD-007.cisco.com (xch-rcd-007.cisco.com [173.37.102.17]) by alln-core-10.cisco.com (8.14.5/8.14.5) with ESMTP id t9MLZJDi026661 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Thu, 22 Oct 2015 21:35:19 GMT Received: from xch-rcd-008.cisco.com (173.37.102.18) by XCH-RCD-007.cisco.com (173.37.102.17) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Thu, 22 Oct 2015 16:34:59 -0500 Received: from xch-rcd-008.cisco.com ([173.37.102.18]) by XCH-RCD-008.cisco.com ([173.37.102.18]) with mapi id 15.00.1104.000; Thu, 22 Oct 2015 16:34:58 -0500 From: "Jim Guichard (jguichar)" To: "Joel M. Halpern" , Dave Dolson , "Reinaldo Penno (repenno)" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AIAAd2SAgAAHJ4D//9QDgIAARPkA///R2YA= Date: Thu, 22 Oct 2015 21:34:58 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> <5629450A.1090805@joelhalpern.com> In-Reply-To: <5629450A.1090805@joelhalpern.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.4.7.141117 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.98.43.180] Content-Type: text/plain; charset="euc-kr" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: 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X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18NCj4+PiBzZmMgbWFp bGluZyBsaXN0DQo+Pj4gc2ZjQGlldGYub3JnDQo+Pj4gaHR0cHM6Ly93d3cuaWV0Zi5vcmcvbWFp bG1hbi9saXN0aW5mby9zZmMNCj4+DQo+PiBfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fXw0KPj4gc2ZjIG1haWxpbmcgbGlzdA0KPj4gc2ZjQGlldGYub3JnDQo+ PiBodHRwczovL3d3dy5pZXRmLm9yZy9tYWlsbWFuL2xpc3RpbmZvL3NmYw0KPj4NCg0K From nobody Thu Oct 22 15:34:31 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B27551B2EA2 for ; Thu, 22 Oct 2015 15:34:30 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from 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17:34:05 -0500 From: "Reinaldo Penno (repenno)" To: Dave Dolson , "Jim Guichard (jguichar)" , "Joel M. Halpern" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AIAAd2SAgAAHJ4D//9QDgIAARQQA//+Z2YAAD1tZgP//m1WA Date: Thu, 22 Oct 2015 22:34:05 +0000 Message-ID: References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> <20151022213437.5697621.29491.42745@sandvine.com> In-Reply-To: <20151022213437.5697621.29491.42745@sandvine.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.5.4.150722 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.235.251] Content-Type: text/plain; charset="euc-kr" Content-ID: <02C372B5BD9B2D41848F288873D404BD@emea.cisco.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining 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T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id fs23SIazXPN2 for ; Thu, 22 Oct 2015 15:43:19 -0700 (PDT) Received: from mail1.sandvine.com (Mail1.sandvine.com [64.7.137.134]) by ietfa.amsl.com (Postfix) with ESMTP id C7DAE1B2E56 for ; Thu, 22 Oct 2015 15:43:18 -0700 (PDT) Received: from BLR-EXCHP-2.sandvine.com (192.168.196.172) by WTL-EXCHP-2.sandvine.com (192.168.194.177) with Microsoft SMTP Server (TLS) id 14.3.195.1; Thu, 22 Oct 2015 18:43:20 -0400 Received: from WTL-EXCHP-2.sandvine.com ([fe80::68ac:f071:19ff:3455]) by blr-exchp-2.sandvine.com ([fe80::6c6d:7108:c63c:9055%14]) with mapi id 14.03.0181.006; Thu, 22 Oct 2015 18:43:17 -0400 From: Dave Dolson To: "Reinaldo Penno (repenno)" , "Jim Guichard (jguichar)" , "Joel M. Halpern" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554CYKA///AVUCAAEthAIAAAh6A///CL9CAAFvzAP//vcFAAAptF4D//8KIiYAAU6eA//+/hl0= Date: Thu, 22 Oct 2015 22:43:18 +0000 Message-ID: <20151022224315.5697621.57557.42754@sandvine.com> References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> <20151022213437.5697621.29491.42745@sandvine.com>, In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: Content-Type: text/plain; charset="euc-kr" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 22:43:21 -0000 QW5vdGhlciBzb2x1dGlvbiBpcyB0byBhZGQgYSBUVEwgdG8gdGhlIE5TSCBoZWFkZXIuDQpEZWNy 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xch-rcd-020.cisco.com (173.37.102.30) by XCH-RCD-007.cisco.com (173.37.102.17) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Fri, 23 Oct 2015 11:06:43 -0500 Received: from xch-rcd-020.cisco.com ([173.37.102.30]) by XCH-RCD-020.cisco.com ([173.37.102.30]) with mapi id 15.00.1104.000; Fri, 23 Oct 2015 11:06:43 -0500 From: "Surendra Kumar (smkumar)" To: "Joel M. Halpern" , "Jim Guichard (jguichar)" , Dave Dolson , "Reinaldo Penno (repenno)" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AIAAd2SAgAAHJ4D//9QDgIAARPkAgADvNzA= Date: Fri, 23 Oct 2015 16:06:43 +0000 Message-ID: <17866bbfdc1b4863a452ecfe3ad40539@XCH-RCD-020.cisco.com> References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> <5629450A.1090805@joelhalpern.com> In-Reply-To: <5629450A.1090805@joelhalpern.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.214.139] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Oct 2015 16:07:20 -0000 Thanks for shining light on NSH service index, it is an important considera= tion and one that needs to be addressed. Slide3, about SFs decrementing SI is in itself a problem. Having SFs interp= ret SPIDs or decrement the index is fraught with problems. Firstly, the SFs now need to be aware of not only the Service Chains but al= so where they are in the service chain. * This blurs the functional lines between SFF and SFs. * Why should a video-optimizer care if it is before or after a firewall or = DPI ? Control plane has to now program SPIDs and SPID/SI specific policies into a= ll the SFs, even though this has nothing to do with the service being deliv= ered by that SF * This again devalues the SFF functionality There is a security implication in allowing SFs decrement the SI. * If an SF decrements more than it should - think of bypassing a firewall, = what good is having an SFF. * This brings up the question of trust domains. Is every SF, third party fo= r instance, part of this trust domain ? * Do we have a mechanism to enforce this ? If the fix, as indicated on slide5/6, is to check the previous index or per= form additional checks, why even allow the SFs to decrement in the first pl= ace ? Having the SFC infra, manage the SPIDs and Service Indices, keeps the bound= aries and the architecture simple. It further allows invariants to be enfor= ced at the infra level while isolating the trust domains. My $.02 Surendra. -----Original Message----- From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern Sent: Thursday, October 22, 2015 1:20 PM To: Jim Guichard (jguichar) ; Dave Dolson ; Reinaldo Penno (repenno) ; sfc@ietf.org Subject: Re: [sfc] NSH Loop Prevention It seems to me that if SFF decrement then they should always decrement.=20 Trying for hybrids seems more complex. At which point I do not see value= in the SF decrementing. If the SFF always decrement, does that complicate your implementation?=20 It does cause some difficulty for mine, but I am having trouble finding a b= etter answer. Yours, Joel On 10/22/15 4:13 PM, Jim Guichard (jguichar) wrote: > I disagree and for me decrementing index at SFF seriously complicates=20 > implementation. If the SFF decrements the index then you would have to=20 > keep track of =B3received" interface as otherwise how would an SFF know=20 > whether to forward to an SF, or decrement and forward to another SF or SF= F? > > Jim > > On 10/22/15, 2:51 PM, "Dave Dolson" wrote: > >> It occurs to me that *both* SFFs and SFs could decrement the Path Index. >> This makes the longest path to be 127 vs. 255. >> But the packet would never be placed on the network with the same=20 >> index twice. >> >> >> I came to my point about not handling bugs by analogy: >> - if we have routers that do not decrement TTL, there can be loops.=20 >> But we don't add another mechanism on top to detect if such buggy=20 >> routers exist. >> >> >> >> -----Original Message----- >> From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >> Sent: Thursday, October 22, 2015 2:25 PM >> To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org >> Subject: Re: [sfc] NSH Loop Prevention >> >> In case it was unclear, I very much appreciate your raising the points. >> >> I am concerned that we probably need a systemic approach to solving=20 >> the SFF forwarding loop problem. Solutions which depend upon the=20 >> combination of transport protocol behaviors and unspecified=20 >> mechanisms in the SFF (such as relating incoming and outgoing=20 >> transport TTLs) would seem to indicate that we have an incomplete specif= ication. >> >> Yours, >> Joel >> >> On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >>> >>> >>> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >>> >>>> To add to Joel's comments, (which I agree with), >>>> >>>> 1. This isn't a solution for NSH carried directly in an Ethernet=20 >>>> frame or other non-IP encapsulations. >>> >>> [RP] Answered that one to Joel. >>> >>>> >>>> 2. If I understand correctly, there is a blatant layering=20 >>>> violation. In fact, the IP TTL will be decremented by both SFF=20 >>>> functions and also by the routers delivering the IP/VxLAN packets betw= een IP end-points. >>>> E.g., >>>> a single SFF-to-SFF hop could be up to 255 IP hops. >>> >>> [RP] This is not clear but a good point for more discussion. >>> >>>> >>>> 3. If an SF does not decrement the path index, I see that as a bug=20 >>>> in SF implementation, not a misconfiguration. >>>> So I don't think the slides 5 or 6 cases need to be handled. >>> >>> >>> [RP] Yes, it is a bug but should you protect the network or not? We kno= w >>> that a high speed loop will make the network crawl and crash. >>> >>>> >>>> >>>> I do see that loops between SFFs (slide 3) are a real problem caused b= y >>>> misconfiguration of SFF forwarding tables, due to buggy orchestration. >>>> >>>> What is a best-practice for solving such problems with an SDN mind-set= ? >>>> Clearly it is possible to (mis)configure OpenFlow switches to create a= n >>>> infinite packet loop. >>>> Is it expected to drop a packet passing too many hops, or merely to >>>> detect a problem? >>> >>> >>> [RP] All good points, the purpose of the presentation was to foster thi= s >>> discussion and see what we can do (or suggest should be done) about it >>> >>>> >>>> >>>> -Dave >>>> >>>> >>>> >>>> -----Original Message----- >>>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern >>>> Sent: Thursday, October 22, 2015 1:36 PM >>>> To: Reinaldo Penno (repenno); sfc@ietf.org >>>> Subject: Re: [sfc] NSH Loop Prevention >>>> >>>> The description of the problem makes me wonder if we are decrementing >>>> the SFP ID in the wrong place. In terms of my implementation, it is >>>> helpful to have the SF do the decrementing. But most of these problem= s >>>> disappear if the SFF is responsible for the decrementing. >>>> >>>> I also have concerns with the material on slides 3 and 5. The >>>> disucssion in slide 3 assumes that the outer encaps is IP, and it >>>> assumes that the TTL on the outgoing transport header is related to th= e >>>> TTL on the incoming transport header. But there is no reason for ther= e >>>> to be a relationship. A perfectly valid implementation strips >>>> transport, looks at NSH, then generates transport. If SFF do not >>>> decrement SFP ID, and if the SFF are misconfigured, a non-terminating >>>> loop results. >>>> >>>> Slide 5 assumes that the SFF knows, when processing a received packet >>> >from an SF, what the index was when it sent the packet to the SF. Eve= n >>>> in the case where the outbound processing SFF is the inbound processin= g >>>> SFF, there is no reason it should have saved that state, and the >>>> assumed >>>> packet matching is neither obvious nor simple. >>>> >>>> Yours, >>>> Joel >>>> >>>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>>> Hello fellow SFCers, >>>>> >>>>> wanted to share implementation experience on NSH Loop prevention >>>>> topic. >>>>> I might write a draft about this during/after the IETF but a >>>>> presentation seems fine at this point. This is not really exhaustive, >>>>> just a summary to gauge interest on the topic. >>>>> >>>>> >>>>> https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx?dl= =3D0 >>>>> >>>>> Thanks, >>>>> >>>>> -RP >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> sfc mailing list >>>>> sfc@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/sfc >>>>> >>>> >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>> >>> >> >> _______________________________________________ >> sfc mailing list >> sfc@ietf.org >> https://www.ietf.org/mailman/listinfo/sfc > > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc > _______________________________________________ sfc mailing list sfc@ietf.org https://www.ietf.org/mailman/listinfo/sfc From nobody Fri Oct 23 09:45:33 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0B0971A7D85 for ; Fri, 23 Oct 2015 09:45:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -5.51 X-Spam-Level: X-Spam-Status: No, score=-5.51 tagged_above=-999 required=5 tests=[BAYES_05=-0.5, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id wvfvmsXtc7mi for ; Fri, 23 Oct 2015 09:45:30 -0700 (PDT) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by ietfa.amsl.com (Postfix) with ESMTP id 5E1B51A7D83 for ; Fri, 23 Oct 2015 09:45:17 -0700 (PDT) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP; 23 Oct 2015 09:45:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,187,1444719600"; d="scan'208,217";a="833983017" Received: from irsmsx153.ger.corp.intel.com ([163.33.192.75]) by fmsmga002.fm.intel.com with ESMTP; 23 Oct 2015 09:45:18 -0700 Received: from irsmsx108.ger.corp.intel.com ([169.254.11.138]) by IRSMSX153.ger.corp.intel.com ([169.254.9.191]) with mapi id 14.03.0248.002; Fri, 23 Oct 2015 17:45:15 +0100 From: "Browne, Rory" To: "sfc@ietf.org" Thread-Topic: NSH Timestamp Thread-Index: AdENsicJjhUXF3fsRGKpi9V4P6fQMw== Date: Fri, 23 Oct 2015 16:45:14 +0000 Message-ID: <798BB24857DDC040825B6C22A8D797C11BC009CB@IRSMSX108.ger.corp.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [163.33.239.180] Content-Type: multipart/alternative; boundary="_000_798BB24857DDC040825B6C22A8D797C11BC009CBIRSMSX108gercor_" MIME-Version: 1.0 Archived-At: Subject: [sfc] NSH Timestamp X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Oct 2015 16:45:32 -0000 --_000_798BB24857DDC040825B6C22A8D797C11BC009CBIRSMSX108gercor_ Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Please see below a link to a draft on performance monitoring of service cha= ins using NSH https://tools.ietf.org/html/draft-browne-ietf-sfc-nsh-timestamp-00 Comments welcome BR Rory -------------------------------------------------------------- Intel Shannon Limited Registered in Ireland Registered Office: Collinstown Industrial Park, Leixlip, County Kildare Registered Number: 308263 Business address: Dromore House, East Park, Shannon, Co. Clare This e-mail and any attachments may contain confidential material for the s= ole use of the intended recipient(s). Any review or distribution by others = is strictly prohibited. If you are not the intended recipient, please conta= ct the sender and delete all copies. --_000_798BB24857DDC040825B6C22A8D797C11BC009CBIRSMSX108gercor_ Content-Type: text/html; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable

Please see below a link to a draft on performance mo= nitoring of service chains using NSH

 

https://tools.ietf.org/html/draft-browne-ietf-sfc-ns= h-timestamp-00

 

Comments welcome

 

BR Rory

 

--------------------------------------------------------------
Intel Shannon Limited
Registered in Ireland
Registered Office: Collinstown Industrial Park, Leixlip, County Kildare
Registered Number: 308263
Business address: Dromore House, East Park, Shannon, Co. Clare

This e-mail and any attachments may contain confidential material for th= e sole use of the intended recipient(s). Any review or distribution by othe= rs is strictly prohibited. If you are not the intended recipient, please co= ntact the sender and delete all copies.

--_000_798BB24857DDC040825B6C22A8D797C11BC009CBIRSMSX108gercor_-- From nobody Fri Oct 23 10:25:08 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4E6551A8865 for ; Fri, 23 Oct 2015 10:25:06 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.6 X-Spam-Level: X-Spam-Status: No, score=-3.6 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, J_CHICKENPOX_22=0.6, RCVD_IN_DNSWL_MED=-2.3] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FpBIzof1Fqu2 for ; Fri, 23 Oct 2015 10:25:03 -0700 (PDT) Received: from g1t5425.austin.hp.com (g1t5425.austin.hp.com [15.216.225.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7C1151A8864 for ; Fri, 23 Oct 2015 10:25:03 -0700 (PDT) Received: from G2W4316.americas.hpqcorp.net (g2w4316.austin.hp.com [16.197.9.73]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by g1t5425.austin.hp.com (Postfix) with ESMTPS id 12AD35E; Fri, 23 Oct 2015 17:25:01 +0000 (UTC) Received: from G2W4313.americas.hpqcorp.net (16.197.24.255) by G2W4316.americas.hpqcorp.net (16.197.9.73) with Microsoft SMTP Server (TLS) id 14.3.169.1; Fri, 23 Oct 2015 17:24:06 +0000 Received: from G1W3656.americas.hpqcorp.net ([169.254.3.159]) by G2W4313.americas.hpqcorp.net ([16.197.24.255]) with mapi id 14.03.0169.001; Fri, 23 Oct 2015 17:24:06 +0000 From: "Bottorff, Paul" To: "Surendra Kumar (smkumar)" , "Joel M. Halpern" , "Jim Guichard (jguichar)" , "Dave Dolson" , "Reinaldo Penno (repenno)" , "sfc@ietf.org" Thread-Topic: [sfc] NSH Loop Prevention Thread-Index: AQHRDOCZNflmCF13HkODj6re4HsYB554GkWAgAAIcgD//43/AIAAd2SAgAAHJ4D//9QDgIAARPkAgADvNzCAABXXYA== Date: Fri, 23 Oct 2015 17:24:05 +0000 Message-ID: <94DA9C7F532AD946852C9C55271952392549C4EC@G1W3656.americas.hpqcorp.net> References: <56291E7B.1070905@joelhalpern.com> <56292A15.901@joelhalpern.com> <5629450A.1090805@joelhalpern.com> <17866bbfdc1b4863a452ecfe3ad40539@XCH-RCD-020.cisco.com> In-Reply-To: <17866bbfdc1b4863a452ecfe3ad40539@XCH-RCD-020.cisco.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [16.193.232.28] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Loop Prevention X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 23 Oct 2015 17:25:06 -0000 This is discussion is enlightening on the use of the service index. It appears we are overloading the use of the service index to both express = the hop count and indicate SF completion. As Surendra has pointed out, using an incrementing index for SF completion = creates both a security problems and control plane problems. In addition, t= he creation of a path as series of index hops makes modification of the cha= in more complex since the entire chain must be re-written to insert or dele= te a SF hop. I believe the SF itself does not need to increment the service index, howev= er it does need to be incremented in the hop to the SF. For instance it cou= ld be incremented by the guest OS or at the vSwitch port (connection point = between vSwitch and vNIC) or at a SFF virtual port. I also agree Dave that the use of IP layer TTL is a layer violation. The next hop and the hop count should be separate fields. It would be bette= r to use the service index strictly as a hop count which should be incremen= ted at both SF(or along the path to SF) and SFF. Cheers, Paul -----Original Message----- From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Surendra Kumar (smkuma= r) Sent: Friday, October 23, 2015 9:07 AM To: Joel M. Halpern; Jim Guichard (jguichar); Dave Dolson; Reinaldo Penno (= repenno); sfc@ietf.org Subject: Re: [sfc] NSH Loop Prevention Thanks for shining light on NSH service index, it is an important considera= tion and one that needs to be addressed. Slide3, about SFs decrementing SI is in itself a problem. Having SFs interp= ret SPIDs or decrement the index is fraught with problems. Firstly, the SFs now need to be aware of not only the Service Chains but al= so where they are in the service chain. * This blurs the functional lines between SFF and SFs. * Why should a video-optimizer care if it is before or after a firewall or = DPI ? Control plane has to now program SPIDs and SPID/SI specific policies into a= ll the SFs, even though this has nothing to do with the service being deliv= ered by that SF * This again devalues the SFF functionality There is a security implication in allowing SFs decrement the SI. * If an SF decrements more than it should - think of bypassing a firewall, = what good is having an SFF. * This brings up the question of trust domains. Is every SF, third party fo= r instance, part of this trust domain ? * Do we have a mechanism to enforce this ? If the fix, as indicated on slide5/6, is to check the previous index or per= form additional checks, why even allow the SFs to decrement in the first pl= ace ? Having the SFC infra, manage the SPIDs and Service Indices, keeps the bound= aries and the architecture simple. It further allows invariants to be enfor= ced at the infra level while isolating the trust domains. My $.02 Surendra. -----Original Message----- From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M. Halpern Sent: Thursday, October 22, 2015 1:20 PM To: Jim Guichard (jguichar) ; Dave Dolson ; Reinaldo Penno (repenno) ; sfc@ietf.org Subject: Re: [sfc] NSH Loop Prevention It seems to me that if SFF decrement then they should always decrement.=20 Trying for hybrids seems more complex. At which point I do not see value= in the SF decrementing. If the SFF always decrement, does that complicate your implementation?=20 It does cause some difficulty for mine, but I am having trouble finding a b= etter answer. Yours, Joel On 10/22/15 4:13 PM, Jim Guichard (jguichar) wrote: > I disagree and for me decrementing index at SFF seriously complicates=20 > implementation. If the SFF decrements the index then you would have to=20 > keep track of =B3received" interface as otherwise how would an SFF know=20 > whether to forward to an SF, or decrement and forward to another SF or SF= F? > > Jim > > On 10/22/15, 2:51 PM, "Dave Dolson" wrote: > >> It occurs to me that *both* SFFs and SFs could decrement the Path Index. >> This makes the longest path to be 127 vs. 255. >> But the packet would never be placed on the network with the same=20 >> index twice. >> >> >> I came to my point about not handling bugs by analogy: >> - if we have routers that do not decrement TTL, there can be loops.=20 >> But we don't add another mechanism on top to detect if such buggy=20 >> routers exist. >> >> >> >> -----Original Message----- >> From: Joel M. Halpern [mailto:jmh@joelhalpern.com] >> Sent: Thursday, October 22, 2015 2:25 PM >> To: Reinaldo Penno (repenno); Dave Dolson; sfc@ietf.org >> Subject: Re: [sfc] NSH Loop Prevention >> >> In case it was unclear, I very much appreciate your raising the points. >> >> I am concerned that we probably need a systemic approach to solving=20 >> the SFF forwarding loop problem. Solutions which depend upon the=20 >> combination of transport protocol behaviors and unspecified=20 >> mechanisms in the SFF (such as relating incoming and outgoing=20 >> transport TTLs) would seem to indicate that we have an incomplete specif= ication. >> >> Yours, >> Joel >> >> On 10/22/15 2:17 PM, Reinaldo Penno (repenno) wrote: >>> >>> >>> On 10/22/15, 11:06 AM, "Dave Dolson" wrote: >>> >>>> To add to Joel's comments, (which I agree with), >>>> >>>> 1. This isn't a solution for NSH carried directly in an Ethernet=20 >>>> frame or other non-IP encapsulations. >>> >>> [RP] Answered that one to Joel. >>> >>>> >>>> 2. If I understand correctly, there is a blatant layering=20 >>>> violation. In fact, the IP TTL will be decremented by both SFF=20 >>>> functions and also by the routers delivering the IP/VxLAN packets betw= een IP end-points. >>>> E.g., >>>> a single SFF-to-SFF hop could be up to 255 IP hops. >>> >>> [RP] This is not clear but a good point for more discussion. >>> >>>> >>>> 3. If an SF does not decrement the path index, I see that as a bug=20 >>>> in SF implementation, not a misconfiguration. >>>> So I don't think the slides 5 or 6 cases need to be handled. >>> >>> >>> [RP] Yes, it is a bug but should you protect the network or not? We=20 >>> know that a high speed loop will make the network crawl and crash. >>> >>>> >>>> >>>> I do see that loops between SFFs (slide 3) are a real problem=20 >>>> caused by misconfiguration of SFF forwarding tables, due to buggy orch= estration. >>>> >>>> What is a best-practice for solving such problems with an SDN mind-set= ? >>>> Clearly it is possible to (mis)configure OpenFlow switches to=20 >>>> create an infinite packet loop. >>>> Is it expected to drop a packet passing too many hops, or merely to=20 >>>> detect a problem? >>> >>> >>> [RP] All good points, the purpose of the presentation was to foster=20 >>> this discussion and see what we can do (or suggest should be done)=20 >>> about it >>> >>>> >>>> >>>> -Dave >>>> >>>> >>>> >>>> -----Original Message----- >>>> From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel M.=20 >>>> Halpern >>>> Sent: Thursday, October 22, 2015 1:36 PM >>>> To: Reinaldo Penno (repenno); sfc@ietf.org >>>> Subject: Re: [sfc] NSH Loop Prevention >>>> >>>> The description of the problem makes me wonder if we are=20 >>>> decrementing the SFP ID in the wrong place. In terms of my=20 >>>> implementation, it is helpful to have the SF do the decrementing. =20 >>>> But most of these problems disappear if the SFF is responsible for the= decrementing. >>>> >>>> I also have concerns with the material on slides 3 and 5. The=20 >>>> disucssion in slide 3 assumes that the outer encaps is IP, and it=20 >>>> assumes that the TTL on the outgoing transport header is related to=20 >>>> the TTL on the incoming transport header. But there is no reason=20 >>>> for there to be a relationship. A perfectly valid implementation=20 >>>> strips transport, looks at NSH, then generates transport. If SFF=20 >>>> do not decrement SFP ID, and if the SFF are misconfigured, a=20 >>>> non-terminating loop results. >>>> >>>> Slide 5 assumes that the SFF knows, when processing a received=20 >>>> packet >>> >from an SF, what the index was when it sent the packet to the SF. =20 >>> >Even >>>> in the case where the outbound processing SFF is the inbound=20 >>>> processing SFF, there is no reason it should have saved that state,=20 >>>> and the assumed packet matching is neither obvious nor simple. >>>> >>>> Yours, >>>> Joel >>>> >>>> On 10/22/15 11:44 AM, Reinaldo Penno (repenno) wrote: >>>>> Hello fellow SFCers, >>>>> >>>>> wanted to share implementation experience on NSH Loop prevention=20 >>>>> topic. >>>>> I might write a draft about this during/after the IETF but a=20 >>>>> presentation seems fine at this point. This is not really=20 >>>>> exhaustive, just a summary to gauge interest on the topic. >>>>> >>>>> >>>>> https://www.dropbox.com/s/ls8utofr1oddqon/nsh_loop_prevention.pptx >>>>> ?dl=3D0 >>>>> >>>>> Thanks, >>>>> >>>>> -RP >>>>> >>>>> >>>>> >>>>> _______________________________________________ >>>>> sfc mailing list >>>>> sfc@ietf.org >>>>> https://www.ietf.org/mailman/listinfo/sfc >>>>> >>>> >>>> _______________________________________________ >>>> sfc mailing list >>>> sfc@ietf.org >>>> https://www.ietf.org/mailman/listinfo/sfc >>> >>> >> >> _______________________________________________ >> sfc mailing list >> sfc@ietf.org >> https://www.ietf.org/mailman/listinfo/sfc > > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc > _______________________________________________ sfc mailing list sfc@ietf.org https://www.ietf.org/mailman/listinfo/sfc _______________________________________________ sfc mailing list sfc@ietf.org https://www.ietf.org/mailman/listinfo/sfc From nobody Sun Oct 25 05:49:23 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 763BA1B2E56; Sun, 25 Oct 2015 05:49:20 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.266 X-Spam-Level: X-Spam-Status: No, score=-2.266 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, IP_NOT_FRIENDLY=0.334, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id DKDaRZMNnCNd; Sun, 25 Oct 2015 05:49:18 -0700 (PDT) Received: from mx0a-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4676A1B2E53; Sun, 25 Oct 2015 05:49:18 -0700 (PDT) Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.15.0.59/8.15.0.59) with SMTP id t9PCj0Ck017608; Sun, 25 Oct 2015 05:49:17 -0700 Received: from il-exch02.marvell.com ([199.203.130.102]) by mx0a-0016f401.pphosted.com with ESMTP id 1xrnjmrvt1-1 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Sun, 25 Oct 2015 05:49:17 -0700 Received: from IL-EXCH01.marvell.com (10.4.102.220) by IL-EXCH02.marvell.com (10.4.102.221) with Microsoft SMTP Server (TLS) id 15.0.1044.25; Sun, 25 Oct 2015 14:49:13 +0200 Received: from IL-EXCH01.marvell.com ([fe80::41:1c9f:8611:3a4a]) by IL-EXCH01.marvell.com ([fe80::41:1c9f:8611:3a4a%20]) with mapi id 15.00.1044.021; Sun, 25 Oct 2015 14:49:13 +0200 From: Tal Mizrahi To: "Browne, Rory" , "sfc@ietf.org" , "tictoc@ietf.org" Thread-Topic: NSH Timestamp Thread-Index: AdENsicJjhUXF3fsRGKpi9V4P6fQMwBbxK5Q Date: Sun, 25 Oct 2015 12:49:13 +0000 Message-ID: References: <798BB24857DDC040825B6C22A8D797C11BC009CB@IRSMSX108.ger.corp.intel.com> In-Reply-To: <798BB24857DDC040825B6C22A8D797C11BC009CB@IRSMSX108.ger.corp.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.4.102.210] Content-Type: multipart/alternative; boundary="_000_e79f0ef0780d45768257d3ebd08f9866ILEXCH01marvellcom_" MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2015-10-25_12:, , signatures=0 X-Proofpoint-Spam-Details: rule=inbound_notspam policy=inbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1507310000 definitions=main-1510250238 Archived-At: Subject: Re: [sfc] NSH Timestamp X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Oct 2015 12:49:20 -0000 --_000_e79f0ef0780d45768257d3ebd08f9866ILEXCH01marvellcom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Rory, I believe that in-band timestamps can certainly be a useful feature in NSH. Major comments: 1. The draft currently does not clarify the use case. While the draft= describes how the timestamp is inserted into the NSH, I could not find a d= escription of how the timestamp is *used*, and what is the expected accurac= y. It is hard to assess whether the solution is adequate without understand= ing the requirement. 2. Why does the draft mandate specific synchronization protocols (NTP= , Sync-E, PTP)? It seems that if you are defining an NSH timestamp TLV, you= can avoid limiting the solution, and leave the synchronization protocol ou= t of scope. 3. The timestamp formats are not clearly defined. Specifically, the t= erm "UTC format" is used throughout the document. I believe UTC defines a t= ime reference, not a timestamp format. Did you mean NTP Timestamp format / = PTP Timestamp format / RFC 3339 / other? Other comments: * Section 3.1: You require both Synchronous Ethernet (2), and IEEE 1588 for frequency dist= ribution (3). These seem like two overlapping requirements. Why do you requ= ire both? Perhap you meant that IEEE 1588 should be used for *time* distrib= ution? * Could you explain why you require very accurate frequency synchro= nization, but inaccurate time synchonization (section 3.1)? * The format of the fields "UTC Reference", "Ingress Timestamp", an= d "Egress Timestamp" is not clear. * Section 3: the terms SCL and FTSN are used before they are define= d. SCL is not defined at all. I guess you mean Service Classifier, but this= should be specified. * The terms "time stamp" and "timestamp" are used intermittently. I= believe "timestamp" is the most common form in IETF documents. * "The FTSN also writes the UTC value into the header so the" - thi= s sentence is not clear at this point. * The terms NTP and IEEE 1588 are used without a reference to the r= elevant standards. * Could you please clarify the following sentence: "the UTC stamp is merely being used as a reference inserted into the TSDB for performance monitoring. It is not a reference for the timestamp itself." Regards, Tal. From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Browne, Rory Sent: Friday, October 23, 2015 7:45 PM To: sfc@ietf.org Subject: [sfc] NSH Timestamp Please see below a link to a draft on performance monitoring of service cha= ins using NSH https://tools.ietf.org/html/draft-browne-ietf-sfc-nsh-timestamp-00 Comments welcome BR Rory -------------------------------------------------------------- Intel Shannon Limited Registered in Ireland Registered Office: Collinstown Industrial Park, Leixlip, County Kildare Registered Number: 308263 Business address: Dromore House, East Park, Shannon, Co. Clare This e-mail and any attachments may contain confidential material for the s= ole use of the intended recipient(s). Any review or distribution by others = is strictly prohibited. If you are not the intended recipient, please conta= ct the sender and delete all copies. --_000_e79f0ef0780d45768257d3ebd08f9866ILEXCH01marvellcom_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Rory,

 

I believe that in-band= timestamps can certainly be a useful feature in NSH.

 

Major comments:

1.&= nbsp;      The draft currently does not clarify the use case. While the dra= ft describes how the timestamp is inserted into the NSH, I could not find a= description of how the timestamp is *used*, and what is the expected accuracy. It is hard to assess whether th= e solution is adequate without understanding the requirement.

2.&= nbsp;      Why does the draft mandate specific synchronization protocols (N= TP, Sync-E, PTP)? It seems that if you are defining an NSH timestamp TLV, y= ou can avoid limiting the solution, and leave the synchronization protocol out of scope.

3.&= nbsp;      The timestamp formats are not clearly defined. Specifically, the= term "UTC format" is used throughout the document. I believe UTC= defines a time reference, not a timestamp format. Did you mean NTP Timestamp format / PTP Timestamp format / RFC 3339 / othe= r?

 

 

Other comments:

 

·         Section 3.1:

You require bot= h Synchronous Ethernet (2), and IEEE 1588 for frequency distribution (3). T= hese seem like two overlapping requirements. Why do you require both? Perha= p you meant that IEEE 1588 should be used for *time* distribution?

·         Could you explain why you require very accurate frequency synchr= onization, but inaccurate time synchonization (section 3.1)?

·         The format of the fields "UTC Reference", "Ingres= s Timestamp", and "Egress Timestamp" is not clear.

·         Section 3: the terms SCL and FTSN are used before they are defin= ed. SCL is not defined at all. I guess you mean Service Classifier, but thi= s should be specified.

·         The terms "time stamp" and "timestamp" are u= sed intermittently. I believe "timestamp" is the most common form= in IETF documents.

·         "The FTSN also writes the UTC value into the header so the&= quot; - this sentence is not clear at this point.

·         The terms NTP and IEEE 1588 are used without a reference to the = relevant standards.

·         Could you please clarify the following sentence:
     "the UTC stamp is merely being used as a refe= rence inserted into
      the TSDB for performance monitoring. It is n= ot a reference for the
      timestamp itself."

 

Regards,

Tal.=

 

 

From: sfc [mai= lto:sfc-bounces@ietf.org] On Behalf Of Browne, Rory
Sent: Friday, October 23, 2015 7:45 PM
To: sfc@ietf.org
Subject: [sfc] NSH Timestamp

 

Please see below a link to a draft on performance mo= nitoring of service chains using NSH

 

https://tools.ietf.org/html/draft-browne-ietf-sf= c-nsh-timestamp-00

 

Comments welcome

 

BR Rory

 

--------------------------------------------------------------
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Registered Office: Collinstown Industrial Park, Leixlip, County Kildare
Registered Number: 308263
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This e-mail and any attachments may contain confidential material for th= e sole use of the intended recipient(s). Any review or distribution by othe= rs is strictly prohibited. If you are not the intended recipient, please co= ntact the sender and delete all copies.

--_000_e79f0ef0780d45768257d3ebd08f9866ILEXCH01marvellcom_-- From nobody Sun Oct 25 06:21:08 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8E0411B2EAC for ; Sun, 25 Oct 2015 06:21:07 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -14.511 X-Spam-Level: X-Spam-Status: No, score=-14.511 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zNAmEwiIz31w for ; Sun, 25 Oct 2015 06:21:05 -0700 (PDT) Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 430291B2EAA for ; Sun, 25 Oct 2015 06:21:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=3305; q=dns/txt; s=iport; t=1445779265; x=1446988865; h=from:to:subject:date:message-id:references:in-reply-to: content-id:content-transfer-encoding:mime-version; bh=+YMR2iDzkqLGxAGIAhJJbN+JFlQccUq3AWnvxFENKGU=; b=OlAgwmpGaS9dDU4n3SzKvqF+kWWV7V3MDai07IEYD9agJqd7T4QyjNJq yiyIMVxG0+LBvJK0Aa/UtoqGQX5BLO71PdaYT0y58FF86aBAfYz03YzIN RfyrQJvg7QhXIqjvrOJ7OFGIovNaicxV3lWDFJxRN+k1p4gabnynFuA7W s=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0AKAgDE1ixW/5NdJa1egzZUbwa+NgENgVoXDIV6AoEWOBQBAQEBAQEBgQqEMgEBAQQBAQE3NAkSAgEIEQMBAh8QIQYLHQgCBAESiBsDEg2/Rw2EVgEBAQEBAQEBAQEBAQEBAQEBAQEahneEfoJQggo6BoQoBY0YiR4BhRuGEYF1gVlIg3eOSIdOAR8BAUKCRIE/cgGGEYEGAQEB X-IronPort-AV: E=Sophos;i="5.20,196,1444694400"; d="scan'208";a="44628507" Received: from rcdn-core-11.cisco.com ([173.37.93.147]) by rcdn-iport-1.cisco.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 25 Oct 2015 13:21:04 +0000 Received: from XCH-RCD-010.cisco.com (xch-rcd-010.cisco.com [173.37.102.20]) by rcdn-core-11.cisco.com (8.14.5/8.14.5) with ESMTP id t9PDL4a9021448 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Sun, 25 Oct 2015 13:21:04 GMT Received: from xch-rcd-008.cisco.com (173.37.102.18) by XCH-RCD-010.cisco.com (173.37.102.20) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Sun, 25 Oct 2015 08:20:41 -0500 Received: from xch-rcd-008.cisco.com ([173.37.102.18]) by XCH-RCD-008.cisco.com ([173.37.102.18]) with mapi id 15.00.1104.000; Sun, 25 Oct 2015 08:20:41 -0500 From: "Jim Guichard (jguichar)" To: Shunsuke Homma , "sfc@ietf.org" Thread-Topic: [sfc] Fwd: New Version Notification for draft-homma-sfc-forwarding-methods-analysis-04.txt Thread-Index: AQHRBx7dIWUOIRL68UuPvS5c9WAbwZ58Un2A Date: Sun, 25 Oct 2015 13:20:41 +0000 Message-ID: References: <20151010015929.14108.56028.idtracker@ietfa.amsl.com> <561F5BFB.7030404@lab.ntt.co.jp> In-Reply-To: <561F5BFB.7030404@lab.ntt.co.jp> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.4.7.141117 x-ms-exchange-messagesentrepresentingtype: 1 x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.98.43.180] Content-Type: text/plain; charset="us-ascii" Content-ID: <10CB85843F28BF41AAD8E0EB1B6E33AF@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] Fwd: New Version Notification for draft-homma-sfc-forwarding-methods-analysis-04.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Oct 2015 13:21:07 -0000 Hi Shunsuke-san, I believe this is a very useful document (for informational purposes) so I would like to encourage you to continue to enhance it. Jim On 10/15/15, 3:55 AM, "Shunsuke Homma" wrote: >Hi, > >We updated "draft-homma-sfc-forwarding-methods-analysis." We received a >suggestion about a new method which inserts SPIs/SIs into IPv6 extension >headers, and added the analysis on the method. > >https://datatracker.ietf.org/doc/draft-homma-sfc-forwarding-methods-analys >is/ > >If you have any questions or comments, please let us know. > > >IMHO, SFC, or forwarding with NSH, is not the only approach to provide >service oriented packet forwarding. Actually, there are several >forwarding methods without NSH, and there are some people who think >additional header is not mandatory. Therefore, I think that this draft >is useful for showing the advantages of SFC compared with other methods, >as informational. > >I would like to know WG's opinion about this draft. >Please comment if you think this draft is worse discussing as a WG draft? > > >Thanks, >Shunsuke > > >-------- Forwarded Message -------- >Subject: New Version Notification for >draft-homma-sfc-forwarding-methods-analysis-04.txt >Date: Fri, 09 Oct 2015 18:59:29 -0700 >From: internet-drafts@ietf.org >To: Alexey Gorbunov , Kengo >, Shunsuke Homma >, Nicolai Leymann , >Kengo Naito , Diego Lopez >, Diego R. Lopez >, David Dolson > > >A new version of I-D, draft-homma-sfc-forwarding-methods-analysis-04.txt >has been successfully submitted by Shunsuke Homma and posted to the >IETF repository. > >Name: draft-homma-sfc-forwarding-methods-analysis >Revision: 04 >Title: Analysis on Forwarding Methods for Service Chaining >Document date: 2015-10-09 >Group: Individual Submission >Pages: 34 >URL:=20 >https://www.ietf.org/internet-drafts/draft-homma-sfc-forwarding-methods-an >alysis-04.txt >Status:=20 >https://datatracker.ietf.org/doc/draft-homma-sfc-forwarding-methods-analys >is/ >Htmlized:=20 >https://tools.ietf.org/html/draft-homma-sfc-forwarding-methods-analysis-04 >Diff:=20 >https://www.ietf.org/rfcdiff?url2=3Ddraft-homma-sfc-forwarding-methods-ana= ly >sis-04 > >Abstract: > This document presents the results of analyzing packet forwarding > methods and path selection patterns for achieving Service Chaining. > In Service Chaining, data packets need to be forwarded to the > appropriate service functions deployed in networks based on service > provided for the packets, and distribution of the service-oriented > route information and steering data packets following the route > information would be required. > >=20 > > > >Please note that it may take a couple of minutes from the time of >submission >until the htmlized version and diff are available at tools.ietf.org. > >The IETF Secretariat > > > > > > > > >_______________________________________________ >sfc mailing list >sfc@ietf.org >https://www.ietf.org/mailman/listinfo/sfc From nobody Mon Oct 26 15:17:03 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 931241A6FDF for ; Mon, 26 Oct 2015 15:17:02 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.277 X-Spam-Level: X-Spam-Status: No, score=-1.277 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, FM_FORGED_GMAIL=0.622, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, SPF_PASS=-0.001] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WPyXFNE2VsoK for ; Mon, 26 Oct 2015 15:17:01 -0700 (PDT) Received: from mail-wi0-x22c.google.com (mail-wi0-x22c.google.com [IPv6:2a00:1450:400c:c05::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id A45571A6FCF for ; Mon, 26 Oct 2015 15:17:00 -0700 (PDT) Received: by wicll6 with SMTP id ll6so134652725wic.0 for ; Mon, 26 Oct 2015 15:16:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:date:message-id:subject:from:to:content-type; bh=c8HgDbIsHUyWr1DblK631r3iGBxPrV092f5v66yjdt0=; b=HFw2O8kCortbk3iPukkg4xAQ/L25Kgp0R6piqF6z60gDXEfuhnm0uQpWY+uyh7k5sg lIQlJRKYz4KwUzrTU616jrl1bZmQlCxfw1zheiLWsyiYUGmASGVBp04opqO1hSK0RDfP mOk69jRGr/YWNL1XT3MxTmj2ecsFYoQxG6QIQdjjtrYyxvWqRi9h33fHXepxbA7LVBgP w5Wpitn/9H1yFDq2sOY6leDpUVcUZZzdSKLG4kUpKwyQGkI7ehKwVmaYwbK1SrP041w7 9hJwbQNtcDpB7leeO2fGdRYDRGuNafC4a/HT/a0MD6CtVkAC/NKWn4mYqregGEsaylDg +XHQ== MIME-Version: 1.0 X-Received: by 10.194.134.135 with SMTP id pk7mr26964170wjb.48.1445897819015; Mon, 26 Oct 2015 15:16:59 -0700 (PDT) Sender: ghanwani@gmail.com Received: by 10.27.33.4 with HTTP; Mon, 26 Oct 2015 15:16:58 -0700 (PDT) Date: Mon, 26 Oct 2015 15:16:58 -0700 X-Google-Sender-Auth: FnalO5XjY4FB3T-HzQ2aKyFVSzQ Message-ID: From: Anoop Ghanwani To: "sfc@ietf.org" Content-Type: multipart/alternative; boundary=089e01228d9ee25254052309513d Archived-At: Subject: [sfc] comments on draft-fedyk-sfc-mac-chain-00 X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Oct 2015 22:17:02 -0000 --089e01228d9ee25254052309513d Content-Type: text/plain; charset=UTF-8 I have reviewed draft-fedyk-sfc-mac-chain-00, and had the following comments. Thanks, Anoop === >>> Original L2, MAC Chaining without NSH +-------------------------------------------+--------------------+ | Outer Ethernet, ET=0x**** | original L2 frame | +-------------------------------------------+--------------------+ >>> If we have a different Ethertype, then we can't process these frames using existing hardware, so then what's the benefit of this proposal vs just using the NSH? The operations required by Table 5, for instance, are not supported by any existing standards and would most likely require new hardware (for those that want to implement this function in hardware). >>> In all cases of MAC chaining after a frame (L2, L3, etc) has been classified the MAC chain begins by prepending the packet with an Ethernet L2 Frame header. The frame will also have a valid 4 byte CRC checksum. >>> Is this a separate CRC from that of a regular Ethernet frame? >>> The DA is looked up in the context of Port 1 (a VN port) and the subsequent DA prime (DA' a CS-MAC used as the new frame DA if this segment is DA forwarding) and SA' (a CS-MAC used as the new frame SA if this segment is DA/SA forwarding) and egress Port 1 prime (1') are determined by the lookup. >>> What is the significant of DA vs DA/SA forwarding? With DA forwarding, does it mean that the SA remains unchanged? Could that potentially cause problems with MAC learning, especially given that: >>> Devices in the path that are not MAC service chaining aware are free to bridge the frame normally or to route using any underlay Layer 3 or 2.5 VN encapsulation. >>> The document would benefit from a more detailed description for branching in Section 4.2. I couldn't get a good feel what exactly what operations are being done when the branching bit is set. In section 4.2.5 >>> Service Functions using DA/SA MAC chaining require only a single MAC address regardless of the number of chains passing through them. >>> It's not clear how you identify a chain using 2 MAC addresses which are both unique. If I have 2 service functions that are being shared by several chains, how does this work? How can tell the difference between SFC A and SFC B when both of them include the same sequence of service functions, say SF X and SF Y, even though they may have additional service functions either before or after these functions? --089e01228d9ee25254052309513d Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I have reviewed draft-fedyk-sfc-mac-chain-00, and had the = following comments.

Thanks,
Anoop
=3D=3D=3D

>&g=
t;>
  Original L2, MAC Chaining without NS=
H
   +-------------------------------------------+--------------------+
   | Outer Ethernet, ET=3D0x****                 | original L2 frame  |
   +-------------------------------------------+--------------------+


>>>

If we= have a different Ethertype, then we can't process these frames using e= xisting hardware, so then what's the benefit of this proposal vs just u= sing the NSH?=C2=A0 The operations required by Table 5, for instance, are n= ot supported by any existing standards and would most likely require new ha= rdware (for those that want to implement this function in hardware).
>>>=C2=A0
In all =
cases of MAC chaining after a frame (L2, L3, etc) has been
   classified the MAC chain begins by prepending the packet with an
   Ethernet L2 Frame header. The frame will also have a valid 4 byte CRC
   checksum.
>>>

Is this a separate CRC fro= m that of a regular Ethernet frame?

>>>
   The DA

   is looked up in the context of Port 1 (a VN p=
ort) and the subsequent
   DA prime (DA' a CS-MAC used as the new frame DA if this segment is D=
A
   forwarding) and SA' (a CS-MAC used as the new frame SA if this
   segment is DA/SA forwarding) and egress Port 1 prime (1') are
   determined by the lookup.
>>>

What is the significant of DA vs DA/SA forwarding?=C2=A0 With DA fo= rwarding, does it mean that the SA remains unchanged?=C2=A0 Could that pote= ntially cause problems with MAC learning, especially given that:
= >>>
   Devices in the path that are=
 not MAC service
   chaining aware are free to bridge the frame normally or to route
   using any underlay Layer 3 or 2.5 VN encapsulation.
>= >>

The document would benefit from a more de= tailed description for branching in Section 4.2.=C2=A0 I couldn't get a= good feel what exactly what operations are being done when the branching b= it is set.

In section 4.2.5
>>>= 
   Service
   Functions using DA/SA MAC chaining require only a single MAC address
   regardless of the number of chains passing through them.
>>>

It's not clear how you ide= ntify a chain using 2 MAC addresses which are both unique.=C2=A0 If I have = 2 service functions that are being shared by several chains, how does this = work?=C2=A0 How can tell the difference between SFC A and SFC B when both o= f them include the same sequence of service functions, say SF X and SF Y, e= ven though they may have additional service functions either before or afte= r these functions?



<= br>
--089e01228d9ee25254052309513d-- From nobody Mon Oct 26 17:25:56 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5AF9E1B31BD for ; Mon, 26 Oct 2015 17:25:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -3.599 X-Spam-Level: X-Spam-Status: No, score=-3.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, J_CHICKENPOX_22=0.6, RCVD_IN_DNSWL_MED=-2.3] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id upSiFqRRATH0 for ; Mon, 26 Oct 2015 17:25:52 -0700 (PDT) Received: from g1t5424.austin.hp.com (g1t5424.austin.hp.com [15.216.225.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C9A1F1B31C1 for ; Mon, 26 Oct 2015 17:25:47 -0700 (PDT) Received: from G2W4316.americas.hpqcorp.net (g2w4316.austin.hp.com [16.197.9.73]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by g1t5424.austin.hp.com (Postfix) with ESMTPS id AE05056; Tue, 27 Oct 2015 00:25:46 +0000 (UTC) Received: from G1W5783.americas.hpqcorp.net (16.193.26.1) by G2W4316.americas.hpqcorp.net (16.197.9.73) with Microsoft SMTP Server (TLS) id 14.3.169.1; Tue, 27 Oct 2015 00:23:52 +0000 Received: from G1W3656.americas.hpqcorp.net ([169.254.3.159]) by G1W5783.americas.hpqcorp.net ([16.193.26.1]) with mapi id 14.03.0169.001; Tue, 27 Oct 2015 00:23:52 +0000 From: "Bottorff, Paul" To: Anoop Ghanwani , "sfc@ietf.org" Thread-Topic: [sfc] comments on draft-fedyk-sfc-mac-chain-00 Thread-Index: AQHREDwMceBDoSM3z0e0J8Po1jUo3p5+eKmA Date: Tue, 27 Oct 2015 00:23:51 +0000 Message-ID: <94DA9C7F532AD946852C9C55271952392549C89D@G1W3656.americas.hpqcorp.net> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [16.193.232.30] Content-Type: multipart/alternative; boundary="_000_94DA9C7F532AD946852C9C55271952392549C89DG1W3656americas_" MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] comments on draft-fedyk-sfc-mac-chain-00 X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Oct 2015 00:25:54 -0000 --_000_94DA9C7F532AD946852C9C55271952392549C89DG1W3656americas_ Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 SGkgQW5vb3A6DQoNClNlZSBiZWxvdywNCg0KQ2hlZXJzLA0KDQpQYXVsDQoNCkZyb206IHNmYyBb bWFpbHRvOnNmYy1ib3VuY2VzQGlldGYub3JnXSBPbiBCZWhhbGYgT2YgQW5vb3AgR2hhbndhbmkN ClNlbnQ6IE1vbmRheSwgT2N0b2JlciAyNiwgMjAxNSAzOjE3IFBNDQpUbzogc2ZjQGlldGYub3Jn DQpTdWJqZWN0OiBbc2ZjXSBjb21tZW50cyBvbiBkcmFmdC1mZWR5ay1zZmMtbWFjLWNoYWluLTAw 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h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=COmmu0r5F7usxdPM/zKi6jN0dGV3QjZ3H53cMkO4JJU=; b=pXOzvvZ7niHv+H1fW6p0zL0fINDCNMlNqz6/EXj4Mk5NpCKecugxe5ZC4PTWWsdLLm 46sREF/qgk0W6znBKdyPkGlc29ijW5qEya4IgLimoKCSqPMJUeQ9ToAEI69lp15wFXfj e5PQhsMJYRpf5dcYYGAVbqP+0d1LYMq1zkaIg8IFUPBIXuUVlv0MZPllsbotaGrT5Qgx OP+XMYeQHBwd/az/CHPGB9DBL3EXp9lZ9i5gSqgXf+XSJowdGlVsGxTmauL4Uer+U3dW Jlbefy68RWtteorG2TEXSzU0mt+eXiI9OhYUNWYWysHFiTzI1VCkj4AypQDmqDkuJ+Xk e38g== MIME-Version: 1.0 X-Received: by 10.194.134.135 with SMTP id pk7mr28641343wjb.48.1445922916633; Mon, 26 Oct 2015 22:15:16 -0700 (PDT) Sender: ghanwani@gmail.com Received: by 10.27.33.4 with HTTP; Mon, 26 Oct 2015 22:15:16 -0700 (PDT) In-Reply-To: <94DA9C7F532AD946852C9C55271952392549C89D@G1W3656.americas.hpqcorp.net> References: <94DA9C7F532AD946852C9C55271952392549C89D@G1W3656.americas.hpqcorp.net> Date: Mon, 26 Oct 2015 22:15:16 -0700 X-Google-Sender-Auth: E7ZjcFzXuxz_BVJaC0-BwccSz7w Message-ID: From: Anoop Ghanwani To: "Bottorff, Paul" Content-Type: multipart/alternative; boundary=089e01228d9ed194f005230f290e Archived-At: Cc: "sfc@ietf.org" Subject: Re: [sfc] comments on draft-fedyk-sfc-mac-chain-00 X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Oct 2015 05:15:19 -0000 --089e01228d9ed194f005230f290e Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Thanks Paul. Please see inline. Anoop On Mon, Oct 26, 2015 at 5:23 PM, Bottorff, Paul wrote: > Hi Anoop: > > > > See below, > > > > Cheers, > > > > Paul > > > > *From:* sfc [mailto:sfc-bounces@ietf.org] *On Behalf Of *Anoop Ghanwani > *Sent:* Monday, October 26, 2015 3:17 PM > *To:* sfc@ietf.org > *Subject:* [sfc] comments on draft-fedyk-sfc-mac-chain-00 > > > > I have reviewed draft-fedyk-sfc-mac-chain-00, and had the following > comments. > > > > Thanks, > > Anoop > > > > =3D=3D=3D > > > > >>> > > Original L2, MAC Chaining without NSH > > +-------------------------------------------+--------------------+ > > | Outer Ethernet, ET=3D0x**** | original L2 frame | > > +-------------------------------------------+--------------------+ > > > > >>> > > > If we have a different Ethertype, then we can't process these frames usin= g > existing hardware, so then what's the benefit of this proposal vs just > using the NSH? The operations required by Table 5, for instance, are not > supported by any existing standards and would most likely require new > hardware (for those that want to implement this function in hardware). > > PB>In the normal case where we have an L3 service frame no further > encapsulations are required. In addition, L2 cases where the MACs don=E2= =80=99t > need to be preserved also don=E2=80=99t need additional encapsulations. > > [ag] I see this as the main useful use case for something like this. Onc= e we get to new forwarding functions/encapsulations, we might as well use NSH. Is there a reason why I should prefer the MAC based approach with a new encap over NSH? The other concern I would have with this, is that if there are any bridges between the SFFs, how do those learn the MAC addresses? Since chains are typically unidirectional, I may end up in situations where the bridges always have to flood all traffic. (Bunch of other stuff deleted.) --089e01228d9ed194f005230f290e Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Thanks Paul.=C2=A0 Please see inline.

A= noop

On Mon,= Oct 26, 2015 at 5:23 PM, Bottorff, Paul <paul.bottorff@hpe.com>= ; wrote:

Hi Anoop:

=C2=A0

See below,

=C2=A0

Cheers,

=C2=A0

Paul

=C2=A0

From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Anoop Ghanwani
Sent: Monday, October 26, 2015 3:17 PM
To: sfc@ietf.org
Subject: [sfc] comments on draft-fedyk-sfc-mac-chain-00

=C2=A0

I have reviewed draft-fedyk-sfc-mac-chain-00, and ha= d the following comments.

=C2=A0

Thanks,

Anoop

=C2=A0

=3D=3D=3D

=C2=A0

>>>=C2=A0

=C2=A0 Original L2, MAC Chaining without N=
SH


=C2=A0=C2=A0 +----------------------------=
---------------+--------------------+


=C2=A0=C2=A0 | Outer Ethernet, ET=3D0x****=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0 | original L2 frame=C2=A0 |

=C2=A0=C2=A0 +----------------------------=
---------------+--------------------+




=C2=A0




>>>=C2=A0



If we have a different Ethertype, then we can't process these frames us=
ing existing hardware, so then what's the benefit of this proposal vs j=
ust using the NSH?=C2=A0 The operations required by Table 5, for instance, =
are not supported by any existing standards and
 would most likely require new hardware (for those that want to implement t=
his function in hardware).


PB>In the normal case where=
 we have an L3 service frame no further encapsulations are required. In add=
ition, L2 cases where the MACs don=E2=80=99t need to be preserved
 also don=E2=80=99t need additional encapsulations.

(Bunch of other stuff deleted.)

--089e01228d9ed194f005230f290e-- From nobody Tue Oct 27 10:11:37 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D156A1ACCEC for ; Tue, 27 Oct 2015 10:11:36 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.999 X-Spam-Level: X-Spam-Status: No, score=-2.999 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, J_CHICKENPOX_22=0.6, J_CHICKENPOX_24=0.6, RCVD_IN_DNSWL_MED=-2.3] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id rwTgp8DikzRU for ; Tue, 27 Oct 2015 10:11:34 -0700 (PDT) Received: from g2t2353.austin.hp.com (g2t2353.austin.hp.com [15.217.128.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 8732A1ACCEB for ; Tue, 27 Oct 2015 10:11:34 -0700 (PDT) Received: from G2W4316.americas.hpqcorp.net (g2w4316.austin.hp.com [16.197.9.73]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by g2t2353.austin.hp.com (Postfix) with ESMTPS id 5258763; Tue, 27 Oct 2015 17:11:33 +0000 (UTC) Received: from G1W5781.americas.hpqcorp.net (16.193.25.255) by G2W4316.americas.hpqcorp.net (16.197.9.73) with Microsoft SMTP Server (TLS) id 14.3.169.1; Tue, 27 Oct 2015 17:10:12 +0000 Received: from G2W2527.americas.hpqcorp.net ([169.254.7.38]) by G1W5781.americas.hpqcorp.net ([16.193.25.255]) with mapi id 14.03.0169.001; Tue, 27 Oct 2015 17:10:13 +0000 From: "Bottorff, Paul" To: Anoop Ghanwani Thread-Topic: [sfc] comments on draft-fedyk-sfc-mac-chain-00 Thread-Index: AQHREDwMceBDoSM3z0e0J8Po1jUo3p5+eKmAgABTzQCAAMRqkA== Date: Tue, 27 Oct 2015 17:10:12 +0000 Message-ID: <94DA9C7F532AD946852C9C5527195239254A08E0@G2W2527.americas.hpqcorp.net> References: 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tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Nejm3nqayB23; Tue, 27 Oct 2015 11:42:47 -0700 (PDT) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by ietfa.amsl.com (Postfix) with ESMTP id 5217F1A064C; Tue, 27 Oct 2015 11:42:47 -0700 (PDT) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga103.fm.intel.com with ESMTP; 27 Oct 2015 11:38:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,206,1444719600"; d="scan'208,217";a="589107909" Received: from irsmsx154.ger.corp.intel.com ([163.33.192.96]) by FMSMGA003.fm.intel.com with ESMTP; 27 Oct 2015 11:38:33 -0700 Received: from irsmsx156.ger.corp.intel.com (10.108.20.68) by IRSMSX154.ger.corp.intel.com (163.33.192.96) with Microsoft SMTP Server (TLS) id 14.3.248.2; Tue, 27 Oct 2015 18:38:30 +0000 Received: from irsmsx108.ger.corp.intel.com ([169.254.11.138]) by IRSMSX156.ger.corp.intel.com ([169.254.3.245]) with mapi id 14.03.0248.002; Tue, 27 Oct 2015 18:38:30 +0000 From: "Browne, Rory" To: Tal Mizrahi , "sfc@ietf.org" , "tictoc@ietf.org" Thread-Topic: NSH Timestamp Thread-Index: AdENsicJjhUXF3fsRGKpi9V4P6fQMwBbxK5QAHDb19A= Date: Tue, 27 Oct 2015 18:38:29 +0000 Message-ID: <798BB24857DDC040825B6C22A8D797C11BC0138B@IRSMSX108.ger.corp.intel.com> References: <798BB24857DDC040825B6C22A8D797C11BC009CB@IRSMSX108.ger.corp.intel.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [163.33.239.182] Content-Type: multipart/alternative; boundary="_000_798BB24857DDC040825B6C22A8D797C11BC0138BIRSMSX108gercor_" MIME-Version: 1.0 Archived-At: Subject: Re: [sfc] NSH Timestamp X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Oct 2015 18:42:51 -0000 --_000_798BB24857DDC040825B6C22A8D797C11BC0138BIRSMSX108gercor_ Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Thanks for the detailed comments Tal Replies inline BR Rory From: Tal Mizrahi [mailto:talmi@marvell.com] Sent: Sunday, October 25, 2015 12:49 PM To: Browne, Rory; sfc@ietf.org; tictoc@ietf.org Subject: RE: NSH Timestamp Hi Rory, I believe that in-band timestamps can certainly be a useful feature in NSH. Major comments: 1. The draft currently does not clarify the use case. While the draft = describes how the timestamp is inserted into the NSH, I could not find a de= scription of how the timestamp is *used*, and what is the expected accuracy= . It is hard to assess whether the solution is adequate without understandi= ng the requirement. RB: We want to be able to tell if a VNF or and underlay segment is misbehav= ing on subscriber traffic. Expected accuracy in the low 10s of microseconds. 2. Why does the draft mandate specific synchronization protocols (NTP,= Sync-E, PTP)? It seems that if you are defining an NSH timestamp TLV, you = can avoid limiting the solution, and leave the synchronization protocol out= of scope. RB: True. We will consider this on next iteration. 3. The timestamp formats are not clearly defined. Specifically, the te= rm "UTC format" is used throughout the document. I believe UTC defines a ti= me reference, not a timestamp format. Did you mean NTP Timestamp format / P= TP Timestamp format / RFC 3339 / other? RB: Sorry - sloppy on our behalf. Yes NTP timestamp format as per section 6= of RFC5905 Other comments: * Section 3.1: You require both Synchronous Ethernet (2), and IEEE 1588 for frequency dist= ribution (3). These seem like two overlapping requirements. Why do you requ= ire both? Perhap you meant that IEEE 1588 should be used for *time* distrib= ution? RB: No we require either * Could you explain why you require very accurate frequency synchron= ization, but inaccurate time synchonization (section 3.1)? RB: The time of day used at the start of the header does not have to be ver= y accurate (Can be 10's of ms out for example) the PTP needs to me more acc= urate (in 10s of microsecond range) * The format of the fields "UTC Reference", "Ingress Timestamp", and= "Egress Timestamp" is not clear. RB: Can you explain * Section 3: the terms SCL and FTSN are used before they are defined= . SCL is not defined at all. I guess you mean Service Classifier, but this = should be specified. RB: FTSN is defined (could be improved though) before usage I think. SCL sh= ould be defined - agreed. * The terms "time stamp" and "timestamp" are used intermittently. I = believe "timestamp" is the most common form in IETF documents. RB: Noted. Will fix this in next revision * "The FTSN also writes the UTC value into the header so the" - this= sentence is not clear at this point. RB: FTSN writes NTP format into the header * The terms NTP and IEEE 1588 are used without a reference to the re= levant standards. RB: Thanks We will reference standards in next revision * Could you please clarify the following sentence: "the UTC stamp is merely being used as a reference inserted into the TSDB for performance monitoring. It is not a reference for the timestamp itself." RB: The NTP stamp is being used by performance management system (PMS) to i= dentify when the monitoring of the flow begun. This is held in the TSDB and= may be retrieved by the PMS for trend analysis of SC performance. Regards, Tal. From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Browne, Rory Sent: Friday, October 23, 2015 7:45 PM To: sfc@ietf.org Subject: [sfc] NSH Timestamp Please see below a link to a draft on performance monitoring of service cha= ins using NSH https://tools.ietf.org/html/draft-browne-ietf-sfc-nsh-timestamp-00 Comments welcome BR Rory -------------------------------------------------------------- Intel Shannon Limited Registered in Ireland Registered Office: Collinstown Industrial Park, Leixlip, County Kildare Registered Number: 308263 Business address: Dromore House, East Park, Shannon, Co. Clare This e-mail and any attachments may contain confidential material for the s= ole use of the intended recipient(s). Any review or distribution by others = is strictly prohibited. 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Wed Oct 28 02:05:36 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A06E71B36C1; Wed, 28 Oct 2015 02:05:34 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.267 X-Spam-Level: X-Spam-Status: No, score=-2.267 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, IP_NOT_FRIENDLY=0.334, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TugxXMrq_cLz; Wed, 28 Oct 2015 02:05:33 -0700 (PDT) Received: from mx0a-0016f401.pphosted.com (mx0a-0016f401.pphosted.com [67.231.148.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 80C4B1B3697; Wed, 28 Oct 2015 02:05:33 -0700 (PDT) Received: from pps.filterd (m0045849.ppops.net [127.0.0.1]) by mx0a-0016f401.pphosted.com (8.15.0.59/8.15.0.59) with SMTP id t9S94uY1021864; Wed, 28 Oct 2015 02:05:33 -0700 Received: from il-exch01.marvell.com ([199.203.130.101]) by mx0a-0016f401.pphosted.com with ESMTP id 1xttdv04na-1 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 28 Oct 2015 02:05:33 -0700 Received: from IL-EXCH01.marvell.com (10.4.102.220) by IL-EXCH01.marvell.com (10.4.102.220) with Microsoft SMTP Server (TLS) id 15.0.1044.25; Wed, 28 Oct 2015 11:05:29 +0200 Received: from IL-EXCH01.marvell.com ([fe80::41:1c9f:8611:3a4a]) by IL-EXCH01.marvell.com ([fe80::41:1c9f:8611:3a4a%20]) with mapi id 15.00.1044.021; Wed, 28 Oct 2015 11:05:29 +0200 From: Tal Mizrahi To: "Browne, Rory" , "sfc@ietf.org" , "tictoc@ietf.org" Thread-Topic: NSH Timestamp Thread-Index: AdENsicJjhUXF3fsRGKpi9V4P6fQMwBbxK5QAHDb19AAHhd7gAAAEiIg Date: Wed, 28 Oct 2015 09:05:28 +0000 Message-ID: References: <798BB24857DDC040825B6C22A8D797C11BC009CB@IRSMSX108.ger.corp.intel.com> <798BB24857DDC040825B6C22A8D797C11BC0138B@IRSMSX108.ger.corp.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [199.203.130.14] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2015-10-28_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=inbound_notspam policy=inbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1507310000 definitions=main-1510280165 Archived-At: Subject: Re: [sfc] NSH Timestamp X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Oct 2015 09:05:34 -0000 Hi Rory, Thanks for the detailed response. A few follow-up questions/comments: >1.=A0=A0=A0=A0=A0 The draft currently does not clarify the use case. While= the draft >describes how the timestamp is inserted into the NSH, I could not find a >description of how the timestamp is *used*, and what is the expected >accuracy. It is hard to assess whether the solution is adequate without >understanding the requirement. > >RB: We want to be able to tell if a VNF or and underlay segment is >misbehaving on subscriber traffic. Expected accuracy in the low 10s of >microseconds. 10s of microsecond: do you see this as a requirement, or is it a best pract= ice based on what common IEEE 1588 equipment can provide? Can you please give a short example that explains why 10s of microseconds i= s necessary? I would strongly recommend to add a section in the draft (preferably at the= beginning) that would describe these use cases and accuracy requirements i= n detail. >.=A0=A0=A0=A0=A0=A0=A0 Could you explain why you require very accurate fre= quency >synchronization, but inaccurate time synchonization (section 3.1)? > >RB: The time of day used at the start of the header does not have to be ve= ry >accurate (Can be 10's of ms out for example) the PTP needs to me more >accurate (in 10s of microsecond range) - Can you please clarify this point: what is the difference between how the= timestamp-at-the-start-of-the-header is used and how the other timestamps = are used? - PTP provides the time-of-day with a microsecond accuracy, so why would we= need an additional less accurate time reference? > >.=A0=A0=A0=A0=A0=A0=A0 The format of the fields "UTC Reference", "Ingress = Timestamp", and >"Egress Timestamp" is not clear. >RB: Can you explain > Based on your response, I understand that uses the NTP 64-b= it timestamp format. Is the same format used also for and = ? This should be defined explicitly in the draft. Cheers, Tal. From nobody Wed Oct 28 03:15:34 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A8E201B4EDC; Wed, 28 Oct 2015 03:15:32 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.911 X-Spam-Level: X-Spam-Status: No, score=-6.911 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2YOWsTufEdMJ; Wed, 28 Oct 2015 03:15:31 -0700 (PDT) Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by ietfa.amsl.com (Postfix) with ESMTP id 6498D1B4EDE; Wed, 28 Oct 2015 03:15:31 -0700 (PDT) Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga103.fm.intel.com with ESMTP; 28 Oct 2015 03:15:31 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,209,1444719600"; d="scan'208";a="821316206" Received: from irsmsx102.ger.corp.intel.com ([163.33.3.155]) by fmsmga001.fm.intel.com with ESMTP; 28 Oct 2015 03:15:30 -0700 Received: from irsmsx108.ger.corp.intel.com ([169.254.11.138]) by IRSMSX102.ger.corp.intel.com ([169.254.2.98]) with mapi id 14.03.0248.002; Wed, 28 Oct 2015 10:15:29 +0000 From: "Browne, Rory" To: Tal Mizrahi , "sfc@ietf.org" , "tictoc@ietf.org" Thread-Topic: NSH Timestamp Thread-Index: AdENsicJjhUXF3fsRGKpi9V4P6fQMwBbxK5QAHDb19AAHhd7gAAAEiIgAAGOwgA= Date: Wed, 28 Oct 2015 10:15:28 +0000 Message-ID: <798BB24857DDC040825B6C22A8D797C11BC015FB@IRSMSX108.ger.corp.intel.com> References: <798BB24857DDC040825B6C22A8D797C11BC009CB@IRSMSX108.ger.corp.intel.com> <798BB24857DDC040825B6C22A8D797C11BC0138B@IRSMSX108.ger.corp.intel.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [163.33.239.182] Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [sfc] NSH Timestamp X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Oct 2015 10:15:32 -0000 More inline Tal BR Rory -----Original Message----- From: Tal Mizrahi [mailto:talmi@marvell.com] = Sent: Wednesday, October 28, 2015 9:05 AM To: Browne, Rory; sfc@ietf.org; tictoc@ietf.org Subject: RE: NSH Timestamp Hi Rory, Thanks for the detailed response. A few follow-up questions/comments: >1.=A0=A0=A0=A0=A0 The draft currently does not clarify the use case. While= the = >draft describes how the timestamp is inserted into the NSH, I could not = >find a description of how the timestamp is *used*, and what is the = >expected accuracy. It is hard to assess whether the solution is = >adequate without understanding the requirement. > >RB: We want to be able to tell if a VNF or and underlay segment is = >misbehaving on subscriber traffic. Expected accuracy in the low 10s of = >microseconds. 10s of microsecond: do you see this as a requirement, or is it a best pract= ice based on what common IEEE 1588 equipment can provide? Can you please give a short example that explains why 10s of microseconds i= s necessary? I would strongly recommend to add a section in the draft (preferably at the= beginning) that would describe these use cases and accuracy requirements i= n detail. RB: That's probably a good idea. 10s of microsecond is a requirement as the= transit times we are seeing for reasonably simple VNFs is in the order of = low 100s of microseconds to over a millisecond depending on packet size, lo= ad etc. So an accuracy in the low 10s of microseconds should be ample to in= dicate user plane performance issues. We will know more once this is coded = and tested. >.=A0=A0=A0=A0=A0=A0=A0 Could you explain why you require very accurate fre= quency = >synchronization, but inaccurate time synchonization (section 3.1)? > >RB: The time of day used at the start of the header does not have to be = >very accurate (Can be 10's of ms out for example) the PTP needs to me = >more accurate (in 10s of microsecond range) - Can you please clarify this point: what is the difference between how the= timestamp-at-the-start-of-the-header is used and how the other timestamps = are used? - PTP provides the time-of-day with a microsecond accuracy, so why would we= need an additional less accurate time reference? RB: The reasoning behind this is if the classifier does not support 1588, b= ut does support NTP. This seems to be the case for some vendors at least wi= th appliance based SCLs. > >.=A0=A0=A0=A0=A0=A0=A0 The format of the fields "UTC Reference", "Ingress = Timestamp", = >and "Egress Timestamp" is not clear. >RB: Can you explain > Based on your response, I understand that uses the NTP 64-b= it timestamp format. Is the same format used also for and = ? This should be defined explicitly in the draft. RB: Agreed Cheers, Tal. -------------------------------------------------------------- Intel Research and Development Ireland Limited Registered in Ireland Registered Office: Collinstown Industrial Park, Leixlip, County Kildare Registered Number: 308263 This e-mail and any attachments may contain confidential material for the s= ole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact = the sender and delete all copies. From nobody Wed Oct 28 09:45:14 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9B03E1B5B2E for ; Wed, 28 Oct 2015 09:45:11 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.911 X-Spam-Level: X-Spam-Status: No, score=-6.911 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=unavailable Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 27rRFecB4kh2 for ; Wed, 28 Oct 2015 09:45:10 -0700 (PDT) Received: from e37.co.us.ibm.com (e37.co.us.ibm.com [32.97.110.158]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 5C75D1B5D13 for ; Wed, 28 Oct 2015 09:29:30 -0700 (PDT) Received: from localhost by e37.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 28 Oct 2015 10:29:28 -0600 X-IBM-Helo: d03dlp01.boulder.ibm.com X-IBM-MailFrom: narten@us.ibm.com X-IBM-RcptTo: mpls@ietf.org;sfc@ietf.org Received: from b03cxnp08025.gho.boulder.ibm.com (b03cxnp08025.gho.boulder.ibm.com [9.17.130.17]) by d03dlp01.boulder.ibm.com (Postfix) with ESMTP id 6758B1FF004C; Wed, 28 Oct 2015 10:17:39 -0600 (MDT) Received: from d03av05.boulder.ibm.com (d03av05.boulder.ibm.com [9.17.195.85]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t9SGS32654001862; Wed, 28 Oct 2015 09:28:03 -0700 Received: from d03av05.boulder.ibm.com (localhost [127.0.0.1]) by d03av05.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t9SGTRA8014828; Wed, 28 Oct 2015 10:29:27 -0600 Received: from cichlid.raleigh.ibm.com ([9.80.99.144]) by d03av05.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t9SGTPMj014677 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 28 Oct 2015 10:29:26 -0600 Received: from cichlid.raleigh.ibm.com.us.ibm.com (localhost.localdomain [127.0.0.1]) by cichlid.raleigh.ibm.com (8.14.4/8.12.5) with ESMTP id t9SGTMEA022375; Wed, 28 Oct 2015 12:29:23 -0400 Date: Wed, 28 Oct 2015 12:21:35 -0400 Message-ID: From: Thomas Narten To: Xuxiaohu In-Reply-To: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB3DFAF@NKGEML512-MBS.china.huawei.com> References: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB3DFAF@NKGEML512-MBS.china.huawei.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL/10.8 EasyPG/1.0.0 Emacs/23.1 (x86_64-redhat-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15102816-0025-0000-0000-00001E52CDB0 Archived-At: Cc: "'mpls@ietf.org'" , "mpls-chairs@tools.ietf.org" , "'sfc@ietf.org'" , "sfc-chairs@tools.ietf.org" Subject: Re: [sfc] New Version Notification for draft-xu-sfc-using-mpls-spring-04.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Oct 2015 16:45:11 -0000 Hi Xiaohu. See below. > I haven't received any response from you yet. Would you please tell us your > thoughts on the new version of this draft. Thanks a lot. > Best regards, Xiaohu (on behalf of all co-authors) > > > -----Original Message----- From: Xuxiaohu Sent: Wednesday, September 09, > > 2015 5:45 PM To: 'sfc@ietf.org'; sfc-chairs@tools.ietf.org Cc: > > 'mpls@ietf.org'; mpls-chairs@tools.ietf.org Subject: FW: New Version > > Notification for draft-xu-sfc-using-mpls-spring-04.txt > > > > Hi all, > > > > Service chaining is an important function for all type of networks including > > those using the source routing paradigm as specified by the SPRING working > > group. This draft is especially focused on the SPRING/MPLS network > > scenario. > > When we posted the early versions (-00 to -02), the feedback from the SFC > > working group chairs was that the solution required changes to the MPLS > > architecture. We discussed this among the authors and posted a new version > > (-03) that does not require any change to the MPLS Architecture anymore. > > Version -04 merely corrects some typos. Good that the document is now consistent with the MPLS architecture. That said, this document is not really core to SFC. E.g., we are focused on being transport independent. This document is MPLS-specific. The key question is how relevant and important it is to the work of this WG. Our read of the mailing list discussions over recent months is that there isn't strong interest in this work. Given the weak interest and lack of clear importance to the WG core deliverables, we do not see justification for taking this on as a WG document. Thomas & Jim > > Now we would like to ask the SFC chairs and WGs if the draft can now be > > considered for adoption by the SFC working group. > > > > Best regards, Xiaohu > > > > > -----Original Message----- From: internet-drafts@ietf.org > > > [mailto:internet-drafts@ietf.org] Sent: Wednesday, September 09, 2015 5:23 > > > PM To: Lizhenbin; Luis M. Contreras; Xuxiaohu; Himanshu C. Shah; Xuxiaohu; > > > Himanshu Shah; Luis M. Contreras; Lizhenbin Subject: New Version > > > Notification for draft-xu-sfc-using-mpls-spring-04.txt > > > > > > > > > A new version of I-D, draft-xu-sfc-using-mpls-spring-04.txt has been > > > successfully submitted by Xiaohu Xu and posted to the IETF > > repository. > > > > > > Name: draft-xu-sfc-using-mpls-spring Revision: 04 Title: Service Function > > > Chaining Using MPLS-SPRING Document date: 2015-09-09 Group: Individual > > > Submission Pages: 7 URL: > > > https://www.ietf.org/internet-drafts/draft-xu-sfc-using-mpls-spring-04 > > > .txt Status: > > > https://datatracker.ietf.org/doc/draft-xu-sfc-using-mpls-spring/ Htmlized: > > > https://tools.ietf.org/html/draft-xu-sfc-using-mpls-spring-04 Diff: > > > https://www.ietf.org/rfcdiff?url2=draft-xu-sfc-using-mpls-spring-04 > > > > > > Abstract: > > > Source Packet Routing in Networking (SPRING) WG specifies a special > > > source routing mechanism. Such source routing mechanism can be > > > leveraged to realize the service path layer functionality of the > > > service function chaining (i.e, steering traffic through a particular > > > service function path) by encoding the service function path or the > > > service function chain information as the explicit path information. > > > This document describes how to leverage the MPLS-based source routing > > > mechanism as developed by the SPRING WG to realize the service path > > > layer functionality of the service function chaining. > > > > > > > > > > > > > > > Please note that it may take a couple of minutes from the time of > > > submission until the htmlized version and diff are available at > > > tools.ietf.org. > > > > > > The IETF Secretariat > From nobody Wed Oct 28 09:54:45 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 11B311A92EC for ; Wed, 28 Oct 2015 09:54:43 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.911 X-Spam-Level: X-Spam-Status: No, score=-6.911 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zeu0hKo-TK5V for ; Wed, 28 Oct 2015 09:54:41 -0700 (PDT) Received: from e38.co.us.ibm.com (e38.co.us.ibm.com [32.97.110.159]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 386681B5B1A for ; Wed, 28 Oct 2015 09:41:50 -0700 (PDT) Received: from localhost by e38.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Wed, 28 Oct 2015 12:41:43 -0400 Date: Wed, 28 Oct 2015 12:41:43 -0400 Message-ID: From: Thomas Narten To: Jiangyuanlong In-Reply-To: <3B0A1BED22CAD649A1B3E97BE5DDD68B6827D45A@szxema506-mbs.china.huawei.com> References: <3B0A1BED22CAD649A1B3E97BE5DDD68B6827D45A@szxema506-mbs.china.huawei.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL/10.8 EasyPG/1.0.0 Emacs/23.1 (x86_64-redhat-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=BIG5 Content-Transfer-Encoding: base64 X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15102816-0029-0000-0000-00000DB5EE73 Archived-At: Cc: "Jim Guichard \(jguichar\)" , "Xuweiping \(A\)" , "sfc@ietf.org" Subject: Re: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Oct 2015 16:54:43 -0000 T24gTW9uLCAxMiBPY3QgMjAxNSAxMTozMDo1NCArMDAwMCwgSmlhbmd5dWFubG9uZyB3cm90ZToN Cg0KPiBXZSB3aWxsIHVwZGF0ZSBvdXIgZHJhZnQtanhjLXNmYy1mbSAob24gU0ZDIE9BTSkgdG8g YSBuZXcgdmVyc2lvbiBzb29uLiBDb3VsZA0KPiB5b3UgcGxlYXNlIGFsbG9jYXRlIGEgc2xvdCBm b3IgdXMgdG8gcHJlc2VudCBpdD8NCg0KVGhhbmsgeW91IGZvciB5b3VyIHJlcXVlc3QuIE91ciBh Z2VuZGEgaXMgZ29pbmcgdG8gYmUgdGlnaHQgKGFzDQphbHdheXMpIGFuZCB0aGVyZSBoYXMgYmVl biBsaXR0bGUgZGlzY3Vzc2lvbiBvZiB0aGlzIGRyYWZ0IG9uIHRoZSBXRw0KbWFpbGluZyBsaXN0 LiAgV2Ugd291bGQgbGlrZSB0byBzZWUgbW9yZSBpbnRlcmVzdCBmcm9tIHRoZSBXRyBiZWZvcmUN CmFsbG9jYXRpbmcgZmFjZS10by1mYWNlIHRpbWUuICBJZiB0aGVyZSB0aGVyZSBpcyBzdWZmaWNp ZW50IGludGVyZXN0DQp3ZSBjYW4gcmV2aXNpdCB0aGlzIGZvciB0aGUgbmV4dCBXRyBtZWV0aW5n IGluIEFyZ2VudGluYS4NCg0KVGhvbWFzICYgSmltLg0KDQoNCj4gDQo+IFJlZ2FyZHMsDQo+IA0K PiBZdWFubG9uZyAmIFdlaXBpbmcNCj4gDQo+IEZyb206IHNmYyBbbWFpbHRvOnNmYy1ib3VuY2Vz QGlldGYub3JnXSBPbiBCZWhhbGYgT2YgSmltIEd1aWNoYXJkIChqZ3VpY2hhcikNCj4gU2VudDog TW9uZGF5LCBPY3RvYmVyIDA1LCAyMDE1IDg6NTEgUE0NCj4gVG86IHNmY0BpZXRmLm9yZw0KPiBT dWJqZWN0OiBbc2ZjXSBTRkMgV0cgYWdlbmRhIHNsb3RzIC0gWW9rb2hhbWENCj4gDQo+IEdyZWV0 aW5ncyBXRzoNCj4gDQo+IE91ciBtZWV0aW5nIGluIFlva29oYW1hIGlzIGZhc3QgYXBwcm9hY2hp bmcuIEFzIGFsd2F5cyB0aGUgZ29hbCBvZiB0aGUgbWVldGluZw0KPiB3aWxsIGJlIHRvIG1ha2Ug dGhlIGJlc3QgdXNlIG9mIG91ciBsaW1pdGVkIGZhY2UtdG8tZmFjZSB0aW1lLiBXaXRoIHRoYXQg aW4NCj4gbWluZCB3ZSB3ZWxjb21lIHJlcXVlc3RzIGZvciBhZ2VuZGEgdGltZS4gDQo+IA0KPiBB cyB3ZSBidWlsZCB0aGUgbWVldGluZyBhZ2VuZGEgb3VyIGdvYWwgd2lsbCBiZSB0byBzZWxlY3Qg cHJlc2VudGF0aW9ucyB0aGF0DQo+IGJlc3QgZnVydGhlciB0aGUgd29yayBvZiB0aGUgV0csIGFu ZCB0aGF0IGdlbmVyYWxseSBtZWFucyBmb2N1c2luZyBvbiBrZXkNCj4gY2hhcnRlciBkZWxpdmVy YWJsZXMgYW5kIHRvcGljcyB3aXRoIGltcG9ydGFudCBvcGVuIGlzc3VlcyB0byByZXNvbHZlLiBX aGVuDQo+IG1ha2luZyBhIHJlcXVlc3QgcGxlYXNlIGNvbnNpZGVyIHdoYXQgeW91IHRoaW5rIHRo ZSBXRyBzaG91bGQgZG8gd2l0aCBpdHMNCj4gY29udGVudCChViBmb3IgZXhhbXBsZToNCj4gDQo+ IKFQICAgICAgICAgRG9lcyB0aGUgZG9jdW1lbnQgaGF2ZSB1c2VmdWwgY29udGVudCB0aGF0IHNo b3VsZCBiZSBtb3ZlZCBpbnRvDQo+IGFub3RoZXIgV0cgZG9jdW1lbnQgb3IgcHJvZ3Jlc3Mgb24g aXRzIG93biBtZXJpdA0KPiANCj4goVAgICAgICAgICBEb2VzIHRoZSBjb250ZW50IGhhdmUgYSBn b29kIGJhc2lzIGZvciBvbmUgb2YgdGhlIFdHIGRvY3VtZW50cyBwZXINCj4gdGhlIGNoYXJ0ZXIN Cj4gDQo+IKFQICAgICAgICAgU2hvdWxkIHRoZSBkb2N1bWVudCBjb250ZW50IGJlIG1lcmdlZCB3 aXRoIG9uZSBvciBtb3JlIG90aGVyDQo+IGRvY3VtZW50cywgc28gdGhhdCBhIGNvbWJpbmVkIGRv Y3VtZW50IGNvdWxkIGJlY29tZSBhIFdHIGRvY3VtZW50DQo+IA0KPiBKaW0gJiBUaG9tYXMNCj4g DQo+IA0KPiBbMiAgPHRleHQvcGxhaW47IHVzLWFzY2lpICg3Yml0KT5dDQo+IF9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fDQo+IHNmYyBtYWlsaW5nIGxpc3QN Cj4gc2ZjQGlldGYub3JnDQo+IGh0dHBzOi8vd3d3LmlldGYub3JnL21haWxtYW4vbGlzdGluZm8v c2ZjDQo= From nobody Wed Oct 28 09:57:49 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1DE1E1A9231 for ; 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Violators will be prosecuted; Wed, 28 Oct 2015 10:51:30 -0600 X-IBM-Helo: d03dlp01.boulder.ibm.com X-IBM-MailFrom: narten@us.ibm.com X-IBM-RcptTo: sfc@ietf.org Received: from b03cxnp07029.gho.boulder.ibm.com (b03cxnp07029.gho.boulder.ibm.com [9.17.130.16]) by d03dlp01.boulder.ibm.com (Postfix) with ESMTP id 61D9A1FF0046 for ; Wed, 28 Oct 2015 10:39:41 -0600 (MDT) Received: from d03av04.boulder.ibm.com (d03av04.boulder.ibm.com [9.17.195.170]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t9SGpT3G64880738 for ; Wed, 28 Oct 2015 09:51:29 -0700 Received: from d03av04.boulder.ibm.com (loopback [127.0.0.1]) by d03av04.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t9SGpTum021098 for ; Wed, 28 Oct 2015 10:51:29 -0600 Received: from cichlid.raleigh.ibm.com ([9.80.99.144]) by d03av04.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t9SGpSYB021019 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Wed, 28 Oct 2015 10:51:29 -0600 Received: from cichlid.raleigh.ibm.com.us.ibm.com (localhost.localdomain [127.0.0.1]) by cichlid.raleigh.ibm.com (8.14.4/8.12.5) with ESMTP id t9SGpRk5025443; Wed, 28 Oct 2015 12:51:27 -0400 Date: Wed, 28 Oct 2015 12:51:27 -0400 Message-ID: From: Thomas Narten To: PEDRO ANDRES ARANDA GUTIERREZ In-Reply-To: References: <20151005055329.29031.27737.idtracker@ietfa.amsl.com> <701F572B-945B-49C4-A61E-BB4E57739F79@telefonica.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL/10.8 EasyPG/1.0.0 Emacs/23.1 (x86_64-redhat-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15102816-0033-0000-0000-000006976C74 Archived-At: Cc: "sfc@ietf.org" Subject: Re: [sfc] FW: New Version Notification for draft-aranda-sf-dp-mobile-00.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Oct 2015 16:57:40 -0000 On Wed, 7 Oct 2015 05:41:20 +0000, PEDRO ANDRES ARANDA GUTIERREZ wrote: > I=E2=80=99m requesting a slot to present this work. I recognise this is n= ew and work > in progress. However, I=E2=80=99m starting to see discussions regarding t= he looks of > future networks under the general =E2=80=985G=E2=80=99 tag in most SDOs a= nd there is a lot of > talk of virtualising everything to the radio access network. I think that= SFC > should, at the very least, be considered as part of the control plane. Let's first see if we can get some discussion on this draft on the list. If there is interest, we can consider a slot at the next IETF meeting. Thomas & Jim >=20 > Thanks, /PA >=20 > PS: my excuses for possible multi-posting. I=E2=80=99m experiencing a lot= of problems > with my email recetly --- Dr. Pedro A. Aranda Guti=C3=A9rrez >=20 > Technology Exploration - Network Innovation & Virtualisation email: pedro= a d0t > aranda At telefonica d0t com Telef=C3=B3nica, Investigaci=C3=B3n y Desarr= ollo C/ > Zurbar=C3=A1n,12 28010 Madrid, Spain >=20 > Fragen sind nicht da, um beantwortet zu werden. Fragen sind da, um geste= llt > zu werden. Georg Kreisler >=20 >=20 >=20 >=20 > > > >-----Mensaje original----- De: "internet-drafts@ietf.org" Fecha: lunes, = 5 de > >octubre de 2015, 7:53 Para: Walter Haeffner, DIEGO LOPEZ GARCIA, paag, D= IEGO > >LOPEZ GARCIA, Walter Haeffner, paag Asunto: New Version Notification for > >draft-aranda-sf-dp-mobile-00.txt > > > >> > >>A new version of I-D, draft-aranda-sf-dp-mobile-00.txt has been success= fully > >>submitted by Pedro A. Aranda and posted to the IETF repository. > >> > >>Name: draft-aranda-sf-dp-mobile Revision: 00 Title: Service Function > >>Chaining Dataplane Elements in Mobile Networks Document date: 2015-10-05 > >>Group: Individual Submission Pages: 11 URL: > >>https://www.ietf.org/internet-drafts/draft-aranda-sf-dp-mobile-00.txt > >>Status: https://datatracker.ietf.org/doc/draft-aranda-sf-dp-mobile/ > >>Htmlized: https://tools.ietf.org/html/draft-aranda-sf-dp-mobile-00 > >> > >> > >>Abstract: > >> The evolution of the network towards 5G implies a challenge for the > >> infrastructure. The targeted services and the full deployment of > >> virtualization in all segments of the network will need service func= tion > >> chains that previously resided in the(local and remote) infrastructu= re of > >> the Network operators to extend to the radio access network (RAN). > >> > >> The objective of this draft is to provide a non-exhaustive but > >> representative list of service functions in 4G and 5G networks. We b= ase > >> on the problem statement [RFC 7498] and architecture framework [SFC-= Arch] > >> of the working group, as well on the existing mobile networks use ca= ses > >> [SFC-mobile-uc] and the requirement gathering process of different > >> initiatives around the world [5GPPP, IMT2020, 5G-FK, IMT2020-CN ] to > >> anticipate network elements that will be needed in 5G networks. > >> > >> > >> > >> > >> > >> > >>Please note that it may take a couple of minutes from the time of submi= ssion > >>until the htmlized version and diff are available at tools.ietf.org. > >> > >>The IETF Secretariat > >> >=20 > ________________________________ >=20 > Este mensaje y sus adjuntos se dirigen exclusivamente a su destinatario, = puede > contener informaci=C3=B3n privilegiada o confidencial y es para uso exclu= sivo de la > persona o entidad de destino. Si no es usted. el destinatario indicado, q= ueda > notificado de que la lectura, utilizaci=C3=B3n, divulgaci=C3=B3n y/o copi= a sin > autorizaci=C3=B3n puede estar prohibida en virtud de la legislaci=C3=B3n = vigente. Si ha > recibido este mensaje por error, le rogamos que nos lo comunique > inmediatamente por esta misma v=C3=ADa y proceda a su destrucci=C3=B3n. >=20 > The information contained in this transmission is privileged and confiden= tial > information intended only for the use of the individual or entity named > above. If the reader of this message is not the intended recipient, you a= re > hereby notified that any dissemination, distribution or copying of this > communication is strictly prohibited. If you have received this transmiss= ion > in error, do not read it. Please immediately reply to the sender that you= have > received this communication in error and then delete it. >=20 > Esta mensagem e seus anexos se dirigem exclusivamente ao seu destinat=C3= =A1rio, > pode conter informa=C3=A7=C3=A3o privilegiada ou confidencial e =C3=A9 pa= ra uso exclusivo da > pessoa ou entidade de destino. Se n=C3=A3o =C3=A9 vossa senhoria o destin= at=C3=A1rio > indicado, fica notificado de que a leitura, utiliza=C3=A7=C3=A3o, divulga= =C3=A7=C3=A3o e/ou c=C3=B3pia > sem autoriza=C3=A7=C3=A3o pode estar proibida em virtude da legisla=C3=A7= =C3=A3o vigente. Se > recebeu esta mensagem por erro, rogamos-lhe que nos o comunique imediatam= ente > por esta mesma via e proceda a sua destrui=C3=A7=C3=A3o > _______________________________________________ sfc mailing list sfc@ietf= .org > https://www.ietf.org/mailman/listinfo/sfc >=20 From nobody Wed Oct 28 13:04:21 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 20D671ACE3C for ; Wed, 28 Oct 2015 13:04:19 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.911 X-Spam-Level: X-Spam-Status: No, score=-6.911 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pXZfh-Idi_gP for ; Wed, 28 Oct 2015 13:04:17 -0700 (PDT) Received: from e35.co.us.ibm.com (e35.co.us.ibm.com [32.97.110.153]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 214D21ACE3B for ; Wed, 28 Oct 2015 13:04:17 -0700 (PDT) Received: from localhost by e35.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 28 Oct 2015 14:04:13 -0600 X-IBM-Helo: d03dlp03.boulder.ibm.com X-IBM-MailFrom: narten@us.ibm.com X-IBM-RcptTo: sfc@ietf.org Received: from b03cxnp08028.gho.boulder.ibm.com (b03cxnp08028.gho.boulder.ibm.com [9.17.130.20]) by d03dlp03.boulder.ibm.com (Postfix) with ESMTP id BD41819D804A for ; Wed, 28 Oct 2015 13:52:22 -0600 (MDT) Received: from d03av05.boulder.ibm.com (d03av05.boulder.ibm.com [9.17.195.85]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t9SK2occ9502980 for ; Wed, 28 Oct 2015 13:02:50 -0700 Received: from d03av05.boulder.ibm.com (localhost [127.0.0.1]) by d03av05.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t9SK4Cj2011781 for ; Wed, 28 Oct 2015 14:04:12 -0600 Received: from cichlid.raleigh.ibm.com ([9.80.99.144]) by d03av05.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t9SK4BJx011673 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Wed, 28 Oct 2015 14:04:12 -0600 Received: from cichlid.raleigh.ibm.com.us.ibm.com (localhost.localdomain [127.0.0.1]) by cichlid.raleigh.ibm.com (8.14.4/8.12.5) with ESMTP id t9SK4A0r021199 for ; Wed, 28 Oct 2015 16:04:11 -0400 Date: Wed, 28 Oct 2015 16:04:10 -0400 Message-ID: From: Thomas Narten To: sfc@ietf.org User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL/10.8 EasyPG/1.0.0 Emacs/23.1 (x86_64-redhat-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15102820-0013-0000-0000-000019C745CF Archived-At: Subject: [sfc] SFC Agenda for Yokohoma X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Oct 2015 20:04:19 -0000 The agenda for Yokohama is been posted at the usual places. E.g., Sfc Status Pages http://tools.ietf.org/wg/sfc/agenda I've included the current contents below. If you are a presenter please plan to send Jim & I slides no later than Monday 11/2 so that we have time to review and post prior to the meeting. Thomas & Jim IETF-94 sfc agenda Session 2015-11-05 0900-1130: Room 502 - Audio stream - sfc chatroom Agenda IETF94 Yokohama SFC Agenda Total time: 2.5 hours 00:00 Introduction (WG-chairs) - [5 minutes] Agenda bashing, note-well, (WG-chairs) - [5 minutes] 00:05 SFC Security Requirements (Presenter + open-mic) - [25 minutes] - SFC Environment Security Requirements (Daniel Migault) - [15 minutes] - http://www.ietf.org/id/draft-mglt-sfc-security-environment-req-00.txt - SFC Security Requirements Q&A (open-mic) - [10 minutes] 00:30 SFC Use Cases (Presenters + open-mic) - [40 minutes] - SFC Use Cases in Mobile Networks (Jeff Napper) - [10 minutes] - https://datatracker.ietf.org/doc/draft-ietf-sfc-use-case-mobility/ - SFC Use Cases for Network Security (Eric Wang) - [10 minutes] - https://www.ietf.org/internet-drafts/draft-wang-sfc-ns-use-cases-00.txt - SFC Use Cases in Broadband (Wei Meng) - [10 minutes] - https://datatracker.ietf.org/doc/draft-meng-sfc-broadband-usecases/ - SFC Use Cases Q&A (open-mic) - [10 minutes] 01:10 SFC Architecture Items (Presenters + open-mic) - [50 Minutes] - UDP Overlay Transport For Network Service Header (Surendra Kumar) - [10 minutes] - https://datatracker.ietf.org/doc/draft-kumar-sfc-nsh-udp-transport/ - Map Assisted SFC Proxy using LISP (Albert Cabellos) - [10 minutes] - https://datatracker.ietf.org/doc/draft-cabellos-sfc-map-assisted-proxy/ - Packet Generation in Service Function Chains (Reinaldo Penno) - [10 minutes] - https://datatracker.ietf.org/doc/draft-penno-sfc-packet/ - Hierarchical Service Function Chaining (Dave Dolson) - [10 minutes] - https://datatracker.ietf.org/doc/draft-dolson-sfc-hierarchical/ - SFC Architecture Items Q&A (open-mic) - [10 minutes] 02:00 SFC Miscellaneous (Presenters + open-mic) - [25 minutes] - SFC Trace Issue Analysis & Solutions (Lei Zhu) - [10 minutes] - https://datatracker.ietf.org/doc/draft-yang-sfc-trace-issue-analysis/ - SFC: Subscriber & Host Identification Considerations (TBD) - [10 minutes] - https://datatracker.ietf.org/doc/draft-sarikaya-sfc-hostid-serviceheader/ - SFC Miscellaneous Q&A (open-mic) - [5 minutes] 02:25 Closing (WG-chairs) - [5 minutes] From nobody Wed Oct 28 17:02:56 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 369301B5F8E for ; Wed, 28 Oct 2015 17:02:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 0.597 X-Spam-Level: X-Spam-Status: No, score=0.597 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HELO_EQ_JP=1.244, HOST_EQ_JP=1.265, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id w2AILPpPWN8B for ; Wed, 28 Oct 2015 17:02:53 -0700 (PDT) Received: from guri.nttv6.jp (guri.nttv6.jp [IPv6:2402:c800:ff06:a::4]) by ietfa.amsl.com (Postfix) with ESMTP id 6ECC01B5F91 for ; Wed, 28 Oct 2015 17:02:53 -0700 (PDT) Received: from z.nttv6.jp (z.nttv6.jp [192.168.8.15]) by guri.nttv6.jp (NTTv6MTA) with ESMTP id A13644E8A5; Thu, 29 Oct 2015 09:02:52 +0900 (JST) Received: from [IPv6:::1] (z.nttv6.jp [IPv6:2402:c800:ff06:6::f]) by z.nttv6.jp (NTTv6MTA) with ESMTPSA id 81A193ACA5; Thu, 29 Oct 2015 09:02:52 +0900 (JST) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 9.1 \(3096.5\)) From: Kengo NAITO In-Reply-To: Date: Thu, 29 Oct 2015 09:02:45 +0900 Content-Transfer-Encoding: quoted-printable Message-Id: References: To: "Jim Guichard (jguichar)" X-Mailer: Apple Mail (2.3096.5) Archived-At: Cc: katsuhiro horiba , "sfc@ietf.org" , =?utf-8?B?5LmF5L+d6IGh5LmL?= , Ayumu Yasuda , =?utf-8?B?5LmF5L+d6IGh5LmL?= , Sekiya Yuji , =?utf-8?B?5pys6ZaT5L+K5LuL?= Subject: Re: [sfc] SFC WG agenda slots - Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Oct 2015 00:02:55 -0000 Hello Jim & Thomas, I and some members from NSP consortium (which is one of the big = organization in Japan who tests all kinds of network virtualization = technologies) formed a team to test a running-code of SFC Proxy at the = IETF hackathon. https://www.ietf.org/registration/MeetingWiki/wiki/94hackathon We would like to introduce our work to SFCers, and would like to ask you = if we can have a slot at SFC meeting in Yokohama. I believe our work would be one good reference to improve SFC. Best Regards, Kengo ------------------------------------------------ Kengo NAITO Technology Development NTT Communications Corporation Tel: +81-50-3813-6053 E-mail: k.naito@nttv6.jp ------------------------------------------------ > 2015/10/05 21:51=E3=80=81Jim Guichard (jguichar) = =E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB=EF=BC=9A >=20 > Greetings WG: >=20 > Our meeting in Yokohama is fast approaching. As always the goal of the = meeting will be to make the best use of our limited face-to-face time. = With that in mind we welcome requests for agenda time.=20 >=20 > As we build the meeting agenda our goal will be to select = presentations that best further the work of the WG, and that generally = means focusing on key charter deliverables and topics with important = open issues to resolve. When making a request please consider what you = think the WG should do with its content =E2=80=93 for example: > =E2=80=A2 Does the document have useful content that should be = moved into another WG document or progress on its own merit > =E2=80=A2 Does the content have a good basis for one of the WG = documents per the charter > =E2=80=A2 Should the document content be merged with one or more = other documents, so that a combined document could become a WG document > Jim & Thomas > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc From nobody Wed Oct 28 18:40:56 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 03D271B6156; Wed, 28 Oct 2015 18:40:55 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.211 X-Spam-Level: X-Spam-Status: No, score=-4.211 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ALoA3B3MLIz9; Wed, 28 Oct 2015 18:40:51 -0700 (PDT) Received: from lhrrgout.huawei.com (lhrrgout.huawei.com [194.213.3.17]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7C2991B6154; Wed, 28 Oct 2015 18:40:49 -0700 (PDT) Received: from 172.18.7.190 (EHLO lhreml401-hub.china.huawei.com) ([172.18.7.190]) by lhrrg01-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id CDF34758; Thu, 29 Oct 2015 01:40:47 +0000 (GMT) Received: from nkgeml407-hub.china.huawei.com (10.98.56.38) by lhreml401-hub.china.huawei.com (10.201.5.240) with Microsoft SMTP Server (TLS) id 14.3.235.1; Thu, 29 Oct 2015 01:40:46 +0000 Received: from NKGEML512-MBS.china.huawei.com ([169.254.8.187]) by nkgeml407-hub.china.huawei.com ([10.98.56.38]) with mapi id 14.03.0235.001; Thu, 29 Oct 2015 09:40:39 +0800 From: Xuxiaohu To: Thomas Narten Thread-Topic: New Version Notification for draft-xu-sfc-using-mpls-spring-04.txt Thread-Index: AQHQ6uEhwUT+nrZsQk6IpAAbYfyXTp4z7JRggEylwuCAAEs5gIABG47w Date: Thu, 29 Oct 2015 01:40:38 +0000 Message-ID: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB3E2EE@NKGEML512-MBS.china.huawei.com> References: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB3DFAF@NKGEML512-MBS.china.huawei.com> In-Reply-To: Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.111.99.55] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-CFilter-Loop: Reflected Archived-At: Cc: "'mpls@ietf.org'" , "mpls-chairs@tools.ietf.org" , "'sfc@ietf.org'" , "sfc-chairs@tools.ietf.org" Subject: Re: [sfc] New Version Notification for draft-xu-sfc-using-mpls-spring-04.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Oct 2015 01:40:55 -0000 Hi Thomas, > -----Original Message----- > From: Thomas Narten [mailto:narten@us.ibm.com] > Sent: Thursday, October 29, 2015 12:22 AM > To: Xuxiaohu > Cc: 'sfc@ietf.org'; sfc-chairs@tools.ietf.org; 'mpls@ietf.org'; > mpls-chairs@tools.ietf.org > Subject: Re: New Version Notification for draft-xu-sfc-using-mpls-spring-= 04.txt >=20 > Hi Xiaohu. >=20 > See below. >=20 > > I haven't received any response from you yet. Would you please tell us > > your thoughts on the new version of this draft. Thanks a lot. >=20 > > Best regards, Xiaohu (on behalf of all co-authors) > > > > > -----Original Message----- From: Xuxiaohu Sent: Wednesday, September > > > 09, > > > 2015 5:45 PM To: 'sfc@ietf.org'; sfc-chairs@tools.ietf.org Cc: > > > 'mpls@ietf.org'; mpls-chairs@tools.ietf.org Subject: FW: New Version > > > Notification for draft-xu-sfc-using-mpls-spring-04.txt > > > > > > Hi all, > > > > > > Service chaining is an important function for all type of networks > > > including those using the source routing paradigm as specified by > > > the SPRING working group. This draft is especially focused on the > > > SPRING/MPLS network scenario. >=20 > > > When we posted the early versions (-00 to -02), the feedback from > > > the SFC working group chairs was that the solution required changes > > > to the MPLS architecture. We discussed this among the authors and > > > posted a new version > > > (-03) that does not require any change to the MPLS Architecture anymo= re. > > > Version -04 merely corrects some typos. >=20 > Good that the document is now consistent with the MPLS architecture. >=20 > That said, this document is not really core to SFC. E.g., we are focused = on being > transport independent. This document is MPLS-specific. In this draft, the SFC encapsulation is implemented in the form of an MPLS = label stack (equivalent to NSH). Such SFC encapsulation could be transporte= d over any transport networks such as IPv4, IPv6, MPLS networks. In a words= , the SFC-encapsulation approach described in this draft is fully transport= -independent indeed. > The key question is how relevant and important it is to the work of this = WG. Our > read of the mailing list discussions over recent months is that there isn= 't strong > interest in this work. By encoding the SFP info by an MPLS label stack (i.e., implementing the SFC= encapsulation in the form of an MPLS label stack), SFF devices could be ea= sily implemented on existing MPLS devices without any change to their data = planes. As a result, there is no need to introduce a totally new SFC encaps= ulation scheme and accordingly there is no need to introduce a totally new = forwarding paradigm (e.g., NSH-based forwarding paradigm) especially when c= onsidering implementing SFFs on hardware platforms due to performance deman= ds. =20 According to the following statement quoted from the current SFC charter: "... The WG will examine existing identifier schemes, if there is a need for such identifiers in the context of the Generic SFC encapsulation, before defining any new identifier scheme. ..." It seems that this MPLS-SPRING-based SFC encapsulation scheme should be rel= evant to the SFC WG. At least, it could be investigated as a light-weight S= FC encapsulation approach (from the aspect of reducing and even avoiding an= y impact on the data plane). Best regards, Xiaohu > Given the weak interest and lack of clear importance to the WG core > deliverables, we do not see justification for taking this on as a WG docu= ment. >=20 > Thomas & Jim >=20 >=20 > > > Now we would like to ask the SFC chairs and WGs if the draft can now > > > be considered for adoption by the SFC working group. >=20 >=20 >=20 > > > > > > Best regards, Xiaohu > > > > > > > -----Original Message----- From: internet-drafts@ietf.org > > > > [mailto:internet-drafts@ietf.org] Sent: Wednesday, September 09, > > > > 2015 5:23 PM To: Lizhenbin; Luis M. Contreras; Xuxiaohu; Himanshu > > > > C. Shah; Xuxiaohu; Himanshu Shah; Luis M. Contreras; Lizhenbin > > > > Subject: New Version Notification for > > > > draft-xu-sfc-using-mpls-spring-04.txt > > > > > > > > > > > > A new version of I-D, draft-xu-sfc-using-mpls-spring-04.txt has > > > > been successfully submitted by Xiaohu Xu and posted to the IETF > > > repository. > > > > > > > > Name: draft-xu-sfc-using-mpls-spring Revision: 04 Title: Service > > > > Function Chaining Using MPLS-SPRING Document date: 2015-09-09 > > > > Group: Individual Submission Pages: 7 URL: > > > > https://www.ietf.org/internet-drafts/draft-xu-sfc-using-mpls-sprin > > > > g-04 > > > > .txt Status: > > > > https://datatracker.ietf.org/doc/draft-xu-sfc-using-mpls-spring/ Ht= mlized: > > > > https://tools.ietf.org/html/draft-xu-sfc-using-mpls-spring-04 Diff: > > > > https://www.ietf.org/rfcdiff?url2=3Ddraft-xu-sfc-using-mpls-spring-= 0 > > > > 4 > > > > > > > > Abstract: > > > > Source Packet Routing in Networking (SPRING) WG specifies a spec= ial > > > > source routing mechanism. Such source routing mechanism can be > > > > leveraged to realize the service path layer functionality of the > > > > service function chaining (i.e, steering traffic through a parti= cular > > > > service function path) by encoding the service function path or = the > > > > service function chain information as the explicit path informat= ion. > > > > This document describes how to leverage the MPLS-based source > routing > > > > mechanism as developed by the SPRING WG to realize the service p= ath > > > > layer functionality of the service function chaining. > > > > > > > > > > > > > > > > > > > > Please note that it may take a couple of minutes from the time of > > > > submission until the htmlized version and diff are available at > > > > tools.ietf.org. > > > > > > > > The IETF Secretariat > > From nobody Thu Oct 29 10:08:24 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com 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d="scan'208";a="350774707" Received: from he113656.emea1.cds.t-internal.com ([10.134.99.16]) by qde0ps.de.t-internal.com with ESMTP/TLS/AES128-SHA; 29 Oct 2015 18:08:10 +0100 Received: from HE113484.emea1.cds.t-internal.com ([10.134.93.124]) by HE113656.emea1.cds.t-internal.com ([10.134.99.16]) with mapi; Thu, 29 Oct 2015 18:08:10 +0100 From: To: , Date: Thu, 29 Oct 2015 18:08:08 +0100 Thread-Topic: [sfc] FW: New Version Notification for draft-aranda-sf-dp-mobile-00.txt Thread-Index: AdERocyPj9ABZtJNR8e5rW+0eg7T2wAyFpcA Message-ID: <05C81A773E48DD49B181B04BA21A342A34F4F30742@HE113484.emea1.cds.t-internal.com> References: <20151005055329.29031.27737.idtracker@ietfa.amsl.com> <701F572B-945B-49C4-A61E-BB4E57739F79@telefonica.com> In-Reply-To: Accept-Language: de-DE Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: de-DE Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: sfc@ietf.org Subject: Re: [sfc] FW: New Version Notification for draft-aranda-sf-dp-mobile-00.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 29 Oct 2015 17:08:23 -0000 RGVhciBhbGwsDQpJIGhhZCBhIGxvb2sgYXQgdGhlIGRyYWZ0IGFuZCB0aGluayBpdCB3b3VsZCBi ZSB3b3J0aCB0byBlbGFib3JhdGUgZnVydGhlciBvbiB0aGlzIC0gYXMgYWxyZWFkeSBtZW50aW9u ZWQgaXQgdGFja2xlcyA1RyBpc3N1ZXMgd2hpY2ggYXJlIGV4cGVjdGVkIHRvIGJlIG9mIG1ham9y IGludGVyZXN0IHRvIGFsbCBtb2JpbGUgYW5kICdpbnRlZ3JhdGVkJyBvcGVyYXRvcnMuDQpNYXli ZSB5b3UgbWlnaHQgYWxzbyBhbm5vdW5jZSB0aGUgZHJhZnQgdG8gdGhlIG5ld2x5IGNyZWF0ZWQg NUdhbmdpcCBkaXNjdXNzaW9uIGxpc3QgKGh0dHBzOi8vd3d3LmlldGYub3JnL21haWxtYW4vbGlz dGluZm8vNWdhbmdpcCkgdG8gZ2V0IGhlbHBmdWwgZmVlZGJhY2suDQoNCkZpcnN0IG9ic2VydmF0 aW9ucyBmcm9tIG15IHNpZGU6IA0KDQpXaHkgaXMgaW4gdGhlIHRpdGxlIG5hbWVkICdEYXRhcGxh bmUnIC0gZG9uJ3QgeW91IGFkZHJlc3MgYm90aCBEUCBhbmQgQ1AgZnVuY3Rpb25zIHRvIGJlIHZp 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X18NCnNmYyBtYWlsaW5nIGxpc3QNCnNmY0BpZXRmLm9yZw0KaHR0cHM6Ly93d3cuaWV0Zi5vcmcv bWFpbG1hbi9saXN0aW5mby9zZmMNCg== From nobody Thu Oct 29 14:26:55 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 013F61B31A0 for ; Thu, 29 Oct 2015 14:26:54 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 1.741 X-Spam-Level: * X-Spam-Status: No, score=1.741 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HTML_MESSAGE=0.001, J_CHICKENPOX_21=0.6, J_CHICKENPOX_31=0.6, MIME_CHARSET_FARAWAY=2.45, T_RP_MATCHES_RCVD=-0.01] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id IZWdWn2vNDfx for ; Thu, 29 Oct 2015 14:26:50 -0700 (PDT) Received: from mail1.sandvine.com (mail1.sandvine.com [64.7.137.165]) by ietfa.amsl.com (Postfix) with ESMTP id C01C41ACEC9 for ; Thu, 29 Oct 2015 14:26:49 -0700 (PDT) Received: from WTL-EXCHP-2.sandvine.com ([fe80::68ac:f071:19ff:3455]) by WTL-EXCHP-3.sandvine.com ([::1]) with mapi id 14.03.0195.001; Thu, 29 Oct 2015 17:26:48 -0400 From: Dave Dolson To: "Reinaldo Penno (repenno)" Thread-Topic: [sfc] in-path packet generation Thread-Index: AQHQ9JdBq4jkPQokAEeBbu3/CXahJ55HilKAgDudL/A= Date: Thu, 29 Oct 2015 21:26:50 +0000 Message-ID: References: <20150921081357.8630.47947.idtracker@ietfa.amsl.com> <6C7D9374-9A11-4D22-9E3C-7FA1EF2B9A95@cisco.com> <560036AB.1030001@joelhalpern.com> <56003F0B.9040002@joelhalpern.com> <5600457E.90604@joelhalpern.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.200.63] Content-Type: multipart/alternative; boundary="_000_E8355113905631478EFF04F5AA706E9830D754ECwtlexchp2sandvi_" MIME-Version: 1.0 Archived-At: Cc: "sfc@ietf.org" Subject: Re: [sfc] in-path packet generation X-BeenThere: sfc@ietf.org 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Reinaldo et al,

 <= /p>

I took another look at dr= aft-penno-sfc-packet-02.

 <= /p>

tl;dr: Overall, I think t= he SF needs to know something about the paths, so the problem cannot be sol= ved entirely in the SFF. So solutions 5.1 and 5.4 are preferable.

 <= /p>

 <= /p>

As I understand section 5= .1, a controller would provide the SF with pairings of complementary path c= oordinates.

E.g.,

Configuration says, =A1= =B0SPI x, SI i  is paired with SPI y, SI j=A1=B1

This would mean that for = a packet with SPI=3Dx and SI=3Di, it can be responded with a packet on SPI= =3Dy and SI=3Dj,

and also the opposite, th= at for a packet with SPI=3Dy and SI=3Dj, it can be responded with a packet = on SPI=3Dx and SI=3Di.

 <= /p>

(In section 5.2, the same= configuration needs to be given to the SFF, I believe, so there is no gett= ing around the data model.)

 <= /p>

In draft-ietf-sfc-control= -plane-00, the C3 interface provides some information to the SF.=

=A1=B0=A1=ADinforms the S= FC-aware SF about the semantics of a context information, which would other= wise have opaque meaning.=A1=B1

I guess this could be rew= orded to be clear about describing the bidirectional semantics of different= NSH coordinates.

 <= /p>

In addition to that descr= iption of C3 interface, I=A1=AFd like to point out another reason why path = information is useful to the SF:

--> some SFs would lik= e to know which side of the flow is internal vs. external=

   - e.g., a fi= rewall provides different policy to outbound packets than inbound packets.<= o:p>

 <= /p>

 <= /p>

I also appreciate the 5.4= algorithmic approach.

In this approach, do you = think it would be reasonable to accept a convention like:=

- paths 1..127 are outbou= nd and

- paths 255..128 are inbo= und?

 <= /p>

(You probably realize thi= s, but it=A1=AFs equivalent view is to treat the SI as a 2=A1=AFs complemen= t signed value. The opposite direction is the negative value.

In your example, the pair= of 6 is calculated as (256-6)=3D250, which is -6.)

 <= /p>

So, from my point of view= , there either needs to be an interface to the SF, or an established conven= tion about path symmetry and packet up/down direction, as well as whether metadata is service-path-invariant.

 <= /p>

-Dave

 <= /p>

 <= /p>

 <= /p>

 <= /p>

From: Reinaldo= Penno (repenno) [mailto:repenno@cisco.com]
Sent: Monday, September 21, 2015 2:06 PM
To: Joel M. Halpern; Dave Dolson
Cc: sfc@ietf.org
Subject: Re: [sfc] in-path packet generation

 

We studied this issue considerably and documented the solutio= ns we implemented here:

 

 

 

 

Abstract:

   Service Functions (e.g., Firewall, NAT, Proxies = and Intrusion

   Prevention Systems) generate packets in the reve= rse flow direction to

   the source of the current in-process packet/flow= .  In this document

   we discuss and propose how to support this requi= red functionality

   within the SFC framework.

 

 

 

 

On 9/21/15, 10:59 AM, "= ;sfc on behalf of Joel M. Halpern" <sfc-bounces@ietf.org on behalf of jmh@joelhalpern.com> wrote:

 

That is an aspect that I ha= d not considered in asking your question.

That is not about symmetry = of SFPs, but about the behavior of service

functions which generate ex= tra packets in each direction.

 

Over all, that is seriously= under-specified, and we should address it.

 

While I don't know what ans= wer the working group will adopt, my

inclination is to say that = such packet generation needs a classifier.

The service function genera= tes the packet with whatever metadata it

wants to attach, and then h= ands it to a classifier to determine what to

do with it.

 

Separately, I would note th= at even if we adopt an SFP-stateful solution

for such service functions,= I would not want the metadata handling to

drive a requirement for suc= h state in all service functions in order to

understand the metadata.

Before someone argues that = this would only be needed in hybrid

deployments, I would observ= e that I expect service functions to be

designed and built to work = in both dedicated and hybrid deployments.

And if MD-1 is a MUST (as i= t currently is written) then they all have to

have this capability.<= /o:p>

 

Yours,

Joel

 

On 9/21/15 1:40 PM, Dave Do= lson wrote:

I might be missing somethin= g, but let's take a very simple case: a proxy SF needs to respond to a SYN = packet received on a SFP with a SYN-ACK. Which SFP should the SYN-ACK be placed on?

 

I've been assuming there ne= eds to be a configuration to pair up left-to-right with right-to-left SFPs,= and that the C3 interface would eventually provide this.=

 

 

-----Original Message-----<= o:p>

From: Joel M. Halpern [mailto:jmh@joelhalpern.com]

Sent: Monday, September 21,= 2015 1:32 PM

To: Dave Dolson; Carlos Pig= nataro (cpignata); wang.cui1@zte.com.cn=

Cc: Wei Meng; sfc@ietf.org

Subject: Re: [sfc] New Vers= ion Notification for draft-wang-sfc-md-type-issues-00.txt=

 

Unless we are using per-sub= scriber SFPs (which scalesvery badly, but you

can do it) I would expect t= hat association to be made on the basis of

subscriber metadata. &= nbsp;In normal circumstances, the path ID is neither

necessary nor sufficient fo= r the service function to enable symmetry.

 

Even if the SFPs are at a g= ranularity so that there are separate SFP IDs

for helping enforce path sy= mmetry, that will not provide the state

needed for the service func= tions.  And the state that is needed for the

service functions is, in al= l cases I can see, sufficeint without

examining the SFP ID.<= /o:p>

 

Yours,

Joel

 

On 9/21/15 1:11 PM, Dave Do= lson wrote:

At least some service funct= ions require per-SFP state to associate bidirectional paths to each other.<= o:p>

 

 

-----Original Message-----<= o:p>

From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Joel = M. Halpern

Sent: Monday, September 21,= 2015 12:56 PM

To: Carlos Pignataro (cpign= ata); wang.cui1@zte.com.cn=

Cc: Wei Meng; sfc@ietf.org

Subject: Re: [sfc] New Vers= ion Notification for draft-wang-sfc-md-type-issues-00.txt=

 

First, if we are doing to a= ssume that Service Functions will use the

SFP-ID to disambiguate type= -1 metadata in mixed environments, we should

say that in the draft.=

 

Second, I am a bit concerne= d by this proposed behavior, because we have

been careful up till now to= have the Service Functions act on metadata

without requiring per-SFP s= tate.  This would mark a significant shift.

 

yours,

Joel

 

On 9/21/15 6:36 AM, Carlos = Pignataro (cpignata) wrote:

Linda,

 

It seems the issue that thi= s draft attempts to raise can be summarized

with this question:

 

"When traffic is steer= ed to SF3, how SF3 to correctly analyze the

Mandatory Context Headers i= n NSH within the arriving traffic?"

 

 

The solution to this, howev= er, is neither of what's presented in

Sections 4.1 and 4.2. The a= nswer is much simpler and already there: the

SFP (by way of the SFP ID) = provides context to understand the format of

the metadata. In other word= s, a given SFP ID will use one of the MD

formats/syntax (DC, Mobilit= y, something else).

 

Thanks,

 

Thumb typed by Carlos Pigna= taro.

Excuze typofraphicak errows=

 

On Sep 21, 2015, at 04:26, = "wang.cui1@zte.com.cn=

 

 

Dear all,=

 

    &nb= sp; Here is a new draft proposed to raise an issue which may exist whe= n

MD Type=3D0x01 is mandatory= .

And to motivate the further= discussion about MD Type. Wish you can pay

attention to this to

continue the discussion and= make a consensus ;)

 

     Th= anks..

 

Best Wishes,

Linda Wang

 

 

 

 

2015/09/21 16:13:57:

 

2015/09/21 16:13=

 

=CA=D5=BC=FE=C8=CB

 

"Cui Wang" <wang.cui1@zte.com.cn <mailto:wang.cui1@zte.com.cn>>= ,

"Wei Meng"

 

=B3=AD=CB=CD

 

=D6=F7=CC=E2

 

New Version Notification fo= r draft-wang-sfc-md-type-issues-00.txt

 

 

A new version of I-D, draft= -wang-sfc-md-type-issues-00.txt

has been successfully submi= tted by Cui Wang and posted to the

IETF repository.=

 

Name:   &nbs= p;  draft-wang-sfc-md-type-issues

Revision:   00

Title:   &nb= sp;  Metadata Type Issues

Document date:   = 2015-09-21

Group:   &nb= sp;  Individual Submission

Pages:   &nb= sp;  14

md-type-issues-00.txt<= /o:p>

type-issues/

 

 

Abstract:=

    &nb= sp; Service function chain is the definition of an ordered set of serv= ice

    &nb= sp; functions.  After instantiated, the service function pat= h is created

    &nb= sp; and the classified traffic is steered through the corresponding

    &nb= sp; service function path and then forwarded to the final destination.=

    &nb= sp; Metadata (MD) is conveyed in SFC data plane which provides the

    &nb= sp; ability to exchange context information between classifiers and SF= s,

    &nb= sp; among SFs, and between external systems and SFs.  This d= ocument is

    &nb= sp; motivated to state an issue when MD Type =3D 0x1 and discuss which=

    &nb= sp; Metadata Type in more appropriate to be mandate in SFC data plane.=

 

 

 

 

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until the htmlized version = and diff are available at tools.ietf.org

 

The IETF Secretariat

 

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--_000_E8355113905631478EFF04F5AA706E9830D754ECwtlexchp2sandvi_-- From nobody Fri Oct 30 05:57:10 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 05BAD1B2BAF for ; Fri, 30 Oct 2015 05:57:09 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.389 X-Spam-Level: X-Spam-Status: No, score=-1.389 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, J_CHICKENPOX_35=0.6, SPF_PASS=-0.001, T_FREEMAIL_DOC_PDF=0.01] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id v6mBntOI4v9a for ; Fri, 30 Oct 2015 05:57:01 -0700 (PDT) Received: from mail-pa0-x235.google.com (mail-pa0-x235.google.com [IPv6:2607:f8b0:400e:c03::235]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 523921B2BAC for ; Fri, 30 Oct 2015 05:57:01 -0700 (PDT) Received: by padhk11 with SMTP id hk11so74387092pad.1 for ; Fri, 30 Oct 2015 05:57:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=w0liIqtowNb5FGo4fxNVWolaWXLR4pvqGJN5ePMKdMA=; b=PftvYsBbATXSERvtppHFJd0ZDefdeJpJRp8Y0z2e6huuZt4b0fFQgTXERfawsmyNzY GVdCCM1PuwR2FPOIBgVjngxAD3FwScz5/Vva9QMv8a9ti2Lw8UH79Zt3LNofeo0qiPRE 6b6t/E9+CR7CEm2JjkwGiojJCqN2ZMFjW3KvIORcatsPN3S6dT5GrOTFw8KpR2mwDGKb TsuB8Neq5VxIKPR0K7aJA7PbagyeOLj96ms/+qAxEBE4gBsEtZ4EZ8WosBWzq8QrG4sf IpmjoHCvmRsSkK/HZ3e7A/fMKuF6UioGSSbnRAD1miNWoxVRAd+4HE7w0lHbkH891gte ZV2w== X-Received: by 10.66.120.136 with SMTP id lc8mr8710507pab.19.1446209820715; Fri, 30 Oct 2015 05:57:00 -0700 (PDT) MIME-Version: 1.0 Received: by 10.66.83.10 with HTTP; Fri, 30 Oct 2015 05:56:19 -0700 (PDT) In-Reply-To: References: From: Sunjai Chalikar Date: Fri, 30 Oct 2015 18:26:19 +0530 Message-ID: To: sfc@ietf.org Content-Type: multipart/mixed; boundary=e89a8ffbac2ba2c4ef052351f678 Archived-At: Subject: Re: [sfc] sfc Digest, Vol 29, Issue 32 X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Oct 2015 12:57:09 -0000 --e89a8ffbac2ba2c4ef052351f678 Content-Type: multipart/alternative; boundary=e89a8ffbac2ba2c4e9052351f676 --e89a8ffbac2ba2c4e9052351f676 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I am an IETF privileged member and have invented IPv8 > Varied Layer Wireless Protocol with 1024 bits of security. pls members of IETF revert back . I am the President & CTO from Peon Level> of my own company named Cisnet Systems + Solutions from India. Also, I have invented CETA bits or bytes after 1trillion of Zetabytes. happy going. Just if u all could spare some time to me checkout my 3 personal websites stated below: http://cisnetsolutions.yolasite.com, http://bramhastra.yolasite.com, http://cisnetsystems.yolasite.com. and my experience sheet is attached. cheers, Mr. Chalikar Sanjay Skype ID: sanjay.chalikare +91 - 9637 436287/ sanjay.chalikar@outlook.com/ sanjaychalikare@gmail.com/ schalikar@gmail.com= / http://lnkd.in/sJm_yE http://www.linkedin.com/pub/sanjay-chalikar/2b/7a3/13a On Thu, Oct 29, 2015 at 10:38 PM, wrote: > Send sfc mailing list submissions to > sfc@ietf.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://www.ietf.org/mailman/listinfo/sfc > or, via email, send a message with subject or body 'help' to > sfc-request@ietf.org > > You can reach the person managing the list at > sfc-owner@ietf.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of sfc digest..." > > Today's Topics: > > 1. SFC Agenda for Yokohoma (Thomas Narten) > 2. Re: SFC WG agenda slots - Yokohama (Kengo NAITO) > 3. Re: New Version Notification for > draft-xu-sfc-using-mpls-spring-04.txt (Xuxiaohu) > 4. Re: FW: New Version Notification for > draft-aranda-sf-dp-mobile-00.txt (Dirk.von-Hugo@telekom.de) > > > ---------- Forwarded message ---------- > From: Thomas Narten > To: sfc@ietf.org > Cc: > Date: Wed, 28 Oct 2015 16:04:10 -0400 > Subject: [sfc] SFC Agenda for Yokohoma > The agenda for Yokohama is been posted at the usual places. E.g., > > Sfc Status Pages > http://tools.ietf.org/wg/sfc/agenda > > I've included the current contents below. > > If you are a presenter please plan to send Jim & I slides no later > than Monday 11/2 so that we have time to review and post prior to the > meeting. > > Thomas & Jim > > > IETF-94 sfc agenda > Session 2015-11-05 0900-1130: Room 502 - Audio stream - sfc chatroom > > Agenda > > > > > IETF94 Yokohama SFC Agenda > Total time: 2.5 hours > > 00:00 Introduction (WG-chairs) - [5 minutes] > Agenda bashing, note-well, (WG-chairs) - [5 minutes] > > 00:05 SFC Security Requirements (Presenter + open-mic) - [25 > minutes] > > - SFC Environment Security Requirements (Daniel Migault= ) > - [15 minutes] > - > http://www.ietf.org/id/draft-mglt-sfc-security-environment-req-00.txt > > - SFC Security Requirements Q&A (open-mic) - [10 minute= s] > > > 00:30 SFC Use Cases (Presenters + open-mic) - [40 minutes] > > - SFC Use Cases in Mobile Networks (Jeff Napper) - [10 > minutes] > - > https://datatracker.ietf.org/doc/draft-ietf-sfc-use-case-mobility/ > > - SFC Use Cases for Network Security (Eric Wang) - [10 > minutes] > - > https://www.ietf.org/internet-drafts/draft-wang-sfc-ns-use-cases-00.txt > > - SFC Use Cases in Broadband (Wei Meng) - [10 minutes] > - > https://datatracker.ietf.org/doc/draft-meng-sfc-broadband-usecases/ > > - SFC Use Cases Q&A (open-mic) - [10 minutes] > > > 01:10 SFC Architecture Items (Presenters + open-mic) - [50 > Minutes] > > - UDP Overlay Transport For Network Service Header > (Surendra Kumar) - [10 minutes] > - > https://datatracker.ietf.org/doc/draft-kumar-sfc-nsh-udp-transport/ > > - Map Assisted SFC Proxy using LISP (Albert Cabellos) - > [10 minutes] > - > https://datatracker.ietf.org/doc/draft-cabellos-sfc-map-assisted-proxy/ > > - Packet Generation in Service Function Chains (Reinald= o > Penno) - [10 minutes] > - > https://datatracker.ietf.org/doc/draft-penno-sfc-packet/ > > - Hierarchical Service Function Chaining (Dave Dolson) = - > [10 minutes] > - > https://datatracker.ietf.org/doc/draft-dolson-sfc-hierarchical/ > > - SFC Architecture Items Q&A (open-mic) - [10 minutes] > > 02:00 SFC Miscellaneous (Presenters + open-mic) - [25 minutes] > > - SFC Trace Issue Analysis & Solutions (Lei Zhu) - [10 > minutes] > - > https://datatracker.ietf.org/doc/draft-yang-sfc-trace-issue-analysis/ > > - SFC: Subscriber & Host Identification Considerations > (TBD) - [10 minutes] > - > https://datatracker.ietf.org/doc/draft-sarikaya-sfc-hostid-serviceheader/ > > - SFC Miscellaneous Q&A (open-mic) - [5 minutes] > > > 02:25 Closing (WG-chairs) - [5 minutes] > > > > > > > > ---------- Forwarded message ---------- > From: Kengo NAITO > To: "Jim Guichard (jguichar)" > Cc: katsuhiro horiba , "sfc@ietf.org" , > "=E4=B9=85=E4=BF=9D=E8=81=A1=E4=B9=8B" , Ayum= u Yasuda , > "=E4=B9=85=E4=BF=9D=E8=81=A1=E4=B9=8B" , Seki= ya Yuji , > "=E6=9C=AC=E9=96=93=E4=BF=8A=E4=BB=8B" > Date: Thu, 29 Oct 2015 09:02:45 +0900 > Subject: Re: [sfc] SFC WG agenda slots - Yokohama > Hello Jim & Thomas, > > I and some members from NSP consortium (which is one of the big > organization in Japan who tests all kinds of network virtualization > technologies) formed a team to test a running-code of SFC Proxy at the IE= TF > hackathon. > > https://www.ietf.org/registration/MeetingWiki/wiki/94hackathon > > We would like to introduce our work to SFCers, and would like to ask you > if we can have a slot at SFC meeting in Yokohama. > I believe our work would be one good reference to improve SFC. > > Best Regards, > Kengo > > ------------------------------------------------ > Kengo NAITO > Technology Development > NTT Communications Corporation > Tel: +81-50-3813-6053 > E-mail: k.naito@nttv6.jp > ------------------------------------------------ > > > 2015/10/05 21:51=E3=80=81Jim Guichard (jguichar) = =E3=81=AE=E3=83=A1=E3=83=BC=E3=83=AB=EF=BC=9A > > > > Greetings WG: > > > > Our meeting in Yokohama is fast approaching. As always the goal of the > meeting will be to make the best use of our limited face-to-face time. Wi= th > that in mind we welcome requests for agenda time. > > > > As we build the meeting agenda our goal will be to select presentations > that best further the work of the WG, and that generally means focusing o= n > key charter deliverables and topics with important open issues to resolve= . > When making a request please consider what you think the WG should do wit= h > its content =E2=80=93 for example: > > =E2=80=A2 Does the document have useful content that should be mo= ved into > another WG document or progress on its own merit > > =E2=80=A2 Does the content have a good basis for one of the WG do= cuments > per the charter > > =E2=80=A2 Should the document content be merged with one or more = other > documents, so that a combined document could become a WG document > > Jim & Thomas > > _______________________________________________ > > sfc mailing list > > sfc@ietf.org > > https://www.ietf.org/mailman/listinfo/sfc > > > > > ---------- Forwarded message ---------- > From: Xuxiaohu > To: Thomas Narten > Cc: "'mpls@ietf.org'" , "mpls-chairs@tools.ietf.org" < > mpls-chairs@tools.ietf.org>, "'sfc@ietf.org'" , " > sfc-chairs@tools.ietf.org" > Date: Thu, 29 Oct 2015 01:40:38 +0000 > Subject: Re: [sfc] New Version Notification for > draft-xu-sfc-using-mpls-spring-04.txt > Hi Thomas, > > > -----Original Message----- > > From: Thomas Narten [mailto:narten@us.ibm.com] > > Sent: Thursday, October 29, 2015 12:22 AM > > To: Xuxiaohu > > Cc: 'sfc@ietf.org'; sfc-chairs@tools.ietf.org; 'mpls@ietf.org'; > > mpls-chairs@tools.ietf.org > > Subject: Re: New Version Notification for > draft-xu-sfc-using-mpls-spring-04.txt > > > > Hi Xiaohu. > > > > See below. > > > > > I haven't received any response from you yet. Would you please tell u= s > > > your thoughts on the new version of this draft. Thanks a lot. > > > > > Best regards, Xiaohu (on behalf of all co-authors) > > > > > > > -----Original Message----- From: Xuxiaohu Sent: Wednesday, Septembe= r > > > > 09, > > > > 2015 5:45 PM To: 'sfc@ietf.org'; sfc-chairs@tools.ietf.org Cc: > > > > 'mpls@ietf.org'; mpls-chairs@tools.ietf.org Subject: FW: New Versio= n > > > > Notification for draft-xu-sfc-using-mpls-spring-04.txt > > > > > > > > Hi all, > > > > > > > > Service chaining is an important function for all type of networks > > > > including those using the source routing paradigm as specified by > > > > the SPRING working group. This draft is especially focused on the > > > > SPRING/MPLS network scenario. > > > > > > When we posted the early versions (-00 to -02), the feedback from > > > > the SFC working group chairs was that the solution required changes > > > > to the MPLS architecture. We discussed this among the authors and > > > > posted a new version > > > > (-03) that does not require any change to the MPLS Architecture > anymore. > > > > Version -04 merely corrects some typos. > > > > Good that the document is now consistent with the MPLS architecture. > > > > That said, this document is not really core to SFC. E.g., we are focuse= d > on being > > transport independent. This document is MPLS-specific. > > In this draft, the SFC encapsulation is implemented in the form of an MPL= S > label stack (equivalent to NSH). Such SFC encapsulation could be > transported over any transport networks such as IPv4, IPv6, MPLS networks= . > In a words, the SFC-encapsulation approach described in this draft is ful= ly > transport-independent indeed. > > > The key question is how relevant and important it is to the work of thi= s > WG. Our > > read of the mailing list discussions over recent months is that there > isn't strong > > interest in this work. > > By encoding the SFP info by an MPLS label stack (i.e., implementing the > SFC encapsulation in the form of an MPLS label stack), SFF devices could = be > easily implemented on existing MPLS devices without any change to their > data planes. As a result, there is no need to introduce a totally new SFC > encapsulation scheme and accordingly there is no need to introduce a > totally new forwarding paradigm (e.g., NSH-based forwarding paradigm) > especially when considering implementing SFFs on hardware platforms due t= o > performance demands. > > According to the following statement quoted from the current SFC charter: > > "... The WG will examine existing identifier schemes, > if there is a need for such identifiers in the context of the Generic S= FC > encapsulation, before defining any new identifier scheme. > ..." > > It seems that this MPLS-SPRING-based SFC encapsulation scheme should be > relevant to the SFC WG. At least, it could be investigated as a > light-weight SFC encapsulation approach (from the aspect of reducing and > even avoiding any impact on the data plane). > > Best regards, > Xiaohu > > > Given the weak interest and lack of clear importance to the WG core > > deliverables, we do not see justification for taking this on as a WG > document. > > > > Thomas & Jim > > > > > > > > Now we would like to ask the SFC chairs and WGs if the draft can no= w > > > > be considered for adoption by the SFC working group. > > > > > > > > > > > > > > Best regards, Xiaohu > > > > > > > > > -----Original Message----- From: internet-drafts@ietf.org > > > > > [mailto:internet-drafts@ietf.org] Sent: Wednesday, September 09, > > > > > 2015 5:23 PM To: Lizhenbin; Luis M. Contreras; Xuxiaohu; Himanshu > > > > > C. Shah; Xuxiaohu; Himanshu Shah; Luis M. Contreras; Lizhenbin > > > > > Subject: New Version Notification for > > > > > draft-xu-sfc-using-mpls-spring-04.txt > > > > > > > > > > > > > > > A new version of I-D, draft-xu-sfc-using-mpls-spring-04.txt has > > > > > been successfully submitted by Xiaohu Xu and posted to the IETF > > > > repository. > > > > > > > > > > Name: draft-xu-sfc-using-mpls-spring Revision: 04 Title: Service > > > > > Function Chaining Using MPLS-SPRING Document date: 2015-09-09 > > > > > Group: Individual Submission Pages: 7 URL: > > > > > https://www.ietf.org/internet-drafts/draft-xu-sfc-using-mpls-spri= n > > > > > g-04 > > > > > .txt Status: > > > > > https://datatracker.ietf.org/doc/draft-xu-sfc-using-mpls-spring/ > Htmlized: > > > > > https://tools.ietf.org/html/draft-xu-sfc-using-mpls-spring-04 > Diff: > > > > > https://www.ietf.org/rfcdiff?url2=3Ddraft-xu-sfc-using-mpls-sprin= g-0 > > > > > 4 > > > > > > > > > > Abstract: > > > > > Source Packet Routing in Networking (SPRING) WG specifies a > special > > > > > source routing mechanism. Such source routing mechanism can b= e > > > > > leveraged to realize the service path layer functionality of t= he > > > > > service function chaining (i.e, steering traffic through a > particular > > > > > service function path) by encoding the service function path o= r > the > > > > > service function chain information as the explicit path > information. > > > > > This document describes how to leverage the MPLS-based source > > routing > > > > > mechanism as developed by the SPRING WG to realize the service > path > > > > > layer functionality of the service function chaining. > > > > > > > > > > > > > > > > > > > > > > > > > Please note that it may take a couple of minutes from the time of > > > > > submission until the htmlized version and diff are available at > > > > > tools.ietf.org. > > > > > > > > > > The IETF Secretariat > > > > > > > > ---------- Forwarded message ---------- > From: > To: , > Cc: sfc@ietf.org > Date: Thu, 29 Oct 2015 18:08:08 +0100 > Subject: Re: [sfc] FW: New Version Notification for > draft-aranda-sf-dp-mobile-00.txt > Dear all, > I had a look at the draft and think it would be worth to elaborate furthe= r > on this - as already mentioned it tackles 5G issues which are expected to > be of major interest to all mobile and 'integrated' operators. > Maybe you might also announce the draft to the newly created 5Gangip > discussion list (https://www.ietf.org/mailman/listinfo/5gangip) to get > helpful feedback. > > First observations from my side: > > Why is in the title named 'Dataplane' - don't you address both DP and CP > functions to be virtualized? > > Sect. 1.3. and ch. 4 are very much similar ... this might be shortened. > > In Ch. 2 shouldn't it read > As the specifications mature, we will provide the updates to the _evolved= _ > LTE _-A/5G_ architecture. ? > > Some nits found in sect. > 1.4: > i) Medium Access Control (MAC) =3D> ii) Medium Access Control (MAC) > > 2.1: > act on user traffic may depend not only depend on subscriber =3D> act on > user traffic may depend not only on subscriber > > 3: > We except the RRC to be integrated =3D> We expect the RRC to be integrate= d > > > Thanks and Best Regards > Dirk > > -----Original Message----- > From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Thomas Narten > Sent: Mittwoch, 28. Oktober 2015 17:51 > To: PEDRO ANDRES ARANDA GUTIERREZ > Cc: sfc@ietf.org > Subject: Re: [sfc] FW: New Version Notification for > draft-aranda-sf-dp-mobile-00.txt > > On Wed, 7 Oct 2015 05:41:20 +0000, PEDRO ANDRES ARANDA GUTIERREZ wrote: > > I=E2=80=99m requesting a slot to present this work. I recognise this is= new > > and work in progress. However, I=E2=80=99m starting to see discussions > > regarding the looks of future networks under the general =E2=80=985G=E2= =80=99 tag in > > most SDOs and there is a lot of talk of virtualising everything to the > > radio access network. I think that SFC should, at the very least, be > considered as part of the control plane. > > Let's first see if we can get some discussion on this draft on the list. > If there is interest, we can consider a slot at the next IETF meeting. > > Thomas & Jim > > > > > Thanks, /PA > > > > PS: my excuses for possible multi-posting. I=E2=80=99m experiencing a l= ot of > > problems with my email recetly --- Dr. Pedro A. Aranda Guti=C3=A9rrez > > > > Technology Exploration - Network Innovation & Virtualisation email: > > pedroa d0t aranda At telefonica d0t com Telef=C3=B3nica, Investigaci=C3= =B3n y > > Desarrollo C/ > > Zurbar=C3=A1n,12 28010 Madrid, Spain > > > > Fragen sind nicht da, um beantwortet zu werden. Fragen sind da, um > > gestellt zu werden. Georg Kreisler > > > > > > > > > > > > > >-----Mensaje original----- De: "internet-drafts@ietf.org" Fecha: > > >lunes, 5 de octubre de 2015, 7:53 Para: Walter Haeffner, DIEGO LOPEZ > > >GARCIA, paag, DIEGO LOPEZ GARCIA, Walter Haeffner, paag Asunto: New > > >Version Notification for draft-aranda-sf-dp-mobile-00.txt > > > > > >> > > >>A new version of I-D, draft-aranda-sf-dp-mobile-00.txt has been > > >>successfully submitted by Pedro A. Aranda and posted to the IETF > repository. > > >> > > >>Name: draft-aranda-sf-dp-mobile Revision: 00 Title: Service Function > > >>Chaining Dataplane Elements in Mobile Networks Document date: > > >>2015-10-05 > > >>Group: Individual Submission Pages: 11 URL: > > >>https://www.ietf.org/internet-drafts/draft-aranda-sf-dp-mobile-00.tx > > >>t > > >>Status: https://datatracker.ietf.org/doc/draft-aranda-sf-dp-mobile/ > > >>Htmlized: https://tools.ietf.org/html/draft-aranda-sf-dp-mobile-00 > > >> > > >> > > >>Abstract: > > >> The evolution of the network towards 5G implies a challenge for th= e > > >> infrastructure. The targeted services and the full deployment of > > >> virtualization in all segments of the network will need service > function > > >> chains that previously resided in the(local and remote) > infrastructure of > > >> the Network operators to extend to the radio access network (RAN). > > >> > > >> The objective of this draft is to provide a non-exhaustive but > > >> representative list of service functions in 4G and 5G networks. We > base > > >> on the problem statement [RFC 7498] and architecture framework > [SFC-Arch] > > >> of the working group, as well on the existing mobile networks use > cases > > >> [SFC-mobile-uc] and the requirement gathering process of different > > >> initiatives around the world [5GPPP, IMT2020, 5G-FK, IMT2020-CN ] = to > > >> anticipate network elements that will be needed in 5G networks. > > >> > > >> > > >> > > >> > > >> > > >> > > >>Please note that it may take a couple of minutes from the time of > > >>submission until the htmlized version and diff are available at > tools.ietf.org. > > >> > > >>The IETF Secretariat > > >> > > > > ________________________________ > > > > Este mensaje y sus adjuntos se dirigen exclusivamente a su > > destinatario, puede contener informaci=C3=B3n privilegiada o confidenci= al y > > es para uso exclusivo de la persona o entidad de destino. Si no es > > usted. el destinatario indicado, queda notificado de que la lectura, > > utilizaci=C3=B3n, divulgaci=C3=B3n y/o copia sin autorizaci=C3=B3n pued= e estar > > prohibida en virtud de la legislaci=C3=B3n vigente. Si ha recibido este > > mensaje por error, le rogamos que nos lo comunique inmediatamente por > esta misma v=C3=ADa y proceda a su destrucci=C3=B3n. > > > > The information contained in this transmission is privileged and > > confidential information intended only for the use of the individual > > or entity named above. If the reader of this message is not the > > intended recipient, you are hereby notified that any dissemination, > > distribution or copying of this communication is strictly prohibited. > > If you have received this transmission in error, do not read it. > > Please immediately reply to the sender that you have received this > communication in error and then delete it. > > > > Esta mensagem e seus anexos se dirigem exclusivamente ao seu > > destinat=C3=A1rio, pode conter informa=C3=A7=C3=A3o privilegiada ou con= fidencial e =C3=A9 > > para uso exclusivo da pessoa ou entidade de destino. Se n=C3=A3o =C3=A9= vossa > > senhoria o destinat=C3=A1rio indicado, fica notificado de que a leitura= , > > utiliza=C3=A7=C3=A3o, divulga=C3=A7=C3=A3o e/ou c=C3=B3pia sem autoriza= =C3=A7=C3=A3o pode estar proibida > > em virtude da legisla=C3=A7=C3=A3o vigente. Se recebeu esta mensagem po= r erro, > > rogamos-lhe que nos o comunique imediatamente por esta mesma via e > > proceda a sua destrui=C3=A7=C3=A3o > > _______________________________________________ sfc mailing list > > sfc@ietf.org https://www.ietf.org/mailman/listinfo/sfc > > > > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc > > _______________________________________________ > sfc mailing list > sfc@ietf.org > https://www.ietf.org/mailman/listinfo/sfc > > --e89a8ffbac2ba2c4e9052351f676 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I am an IETF privileged member and= have invented IPv8 > Varied Layer Wireless Protocol with 1024 bits of s= ecurity. pls members of IETF revert back .=C2=A0

I am the President &= amp; CTO from Peon Level> of my own company named Cisnet Systems + Solut= ions from India.

Al= so, I have invented CETA bits or bytes after 1trillion of Zetabytes. happy = going. Just if u all could spare some time to me checkout my 3 personal web= sites stated below:

http://cisnetsolutions.yol= asite.com, http://bramhastra= .yolasite.com, http://cis= netsystems.yolasite.com.

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http://www.linkedin.com/pub/sanj= ay-chalikar/2b/7a3/13a


On Thu, Oct 29, 2015 at 10:38 PM, <sfc-= request@ietf.org> wrote:
Se= nd sfc mailing list submissions to
=C2=A0 =C2=A0 =C2=A0 =C2=A0 sfc@ietf.org

To subscribe or unsubscribe via the World Wide Web, visit
=C2=A0 =C2=A0 =C2=A0 =C2=A0 https://www.ietf.org/mailman/li= stinfo/sfc
or, via email, send a message with subject or body 'help' to
=C2=A0 =C2=A0 =C2=A0 =C2=A0 sfc-req= uest@ietf.org

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When replying, please edit your Subject line so it is more specific
than "Re: Contents of sfc digest..."

Today's Topics:

=C2=A0 =C2=A01. SFC Agenda for Yokohoma (Thomas Narten)
=C2=A0 =C2=A02. Re: SFC WG agenda slots - Yokohama (Kengo NAITO)
=C2=A0 =C2=A03. Re: New Version Notification for
=C2=A0 =C2=A0 =C2=A0 draft-xu-sfc-using-mpls-spring-04.txt (Xuxiaohu)
=C2=A0 =C2=A04. Re: FW: New Version Notification for
=C2=A0 =C2=A0 =C2=A0 draft-aranda-sf-dp-mobile-00.txt (Dirk.von-Hugo@telekom.de)


---------- Forwarded message ----------
From:=C2=A0Thomas Narten= <narten@us.ibm.com>
To:= =C2=A0sfc@ietf.org
Cc:=C2=A0
Date= :=C2=A0Wed, 28 Oct 2015 16:04:10 -0400
Subject:=C2=A0[sfc] SFC Agenda fo= r Yokohoma
The agenda for Yokohama is been posted at the usual places. E= .g.,

=C2=A0 =C2=A0 Sfc Status Pages
=C2=A0 =C2=A0 http://tools.ietf.org/wg/sfc/agenda

I've included the current contents below.

If you are a presenter please plan to send Jim & I slides no later
than Monday 11/2 so that we have time to review and post prior to the
meeting.

Thomas & Jim


IETF-94 sfc agenda
Session 2015-11-05 0900-1130: Room 502 - Audio stream - sfc chatroom

Agenda




=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 IETF94 Yokohama SFC Agenda
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Total time: 2.5 hours

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 00:00 Introduction (WG-chairs) - [5 minu= tes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0Agenda= bashing, note-well, (WG-chairs) - [5 minutes]

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 00:05 SFC Security Requirements (Present= er + open-mic) - [25 minutes]

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC Enviro= nment Security Requirements (Daniel Migault) - [15 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - http://www.= ietf.org/id/draft-mglt-sfc-security-environment-req-00.txt

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC Securi= ty Requirements Q&A (open-mic) - [10 minutes]


=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 00:30 SFC Use Cases (Presenters + open-m= ic) - [40 minutes]

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC Use Ca= ses in Mobile Networks (Jeff Napper) - [10 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - https://datatr= acker.ietf.org/doc/draft-ietf-sfc-use-case-mobility/

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC Use Ca= ses for Network Security (Eric Wang) - [10 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - https://w= ww.ietf.org/internet-drafts/draft-wang-sfc-ns-use-cases-00.txt

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC Use Ca= ses in Broadband (Wei Meng) - [10 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - https://datat= racker.ietf.org/doc/draft-meng-sfc-broadband-usecases/

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC Use Ca= ses Q&A (open-mic) - [10 minutes]


=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 01:10 SFC Architecture Items (Presenters= + open-mic) - [50 Minutes]

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - UDP Overla= y Transport For Network Service Header (Surendra Kumar) - [10 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - https://datat= racker.ietf.org/doc/draft-kumar-sfc-nsh-udp-transport/

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - Map Assist= ed SFC Proxy using LISP (Albert Cabellos) - [10 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - https://d= atatracker.ietf.org/doc/draft-cabellos-sfc-map-assisted-proxy/

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - Packet Gen= eration in Service Function Chains (Reinaldo Penno) - [10 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - https://datatracker.ietf= .org/doc/draft-penno-sfc-packet/

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - Hierarchic= al Service Function Chaining (Dave Dolson) - [10 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - https://datatrack= er.ietf.org/doc/draft-dolson-sfc-hierarchical/

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC Archit= ecture Items Q&A (open-mic) - [10 minutes]

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 02:00 SFC Miscellaneous (Presenters + op= en-mic) - [25 minutes]

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC Trace = Issue Analysis & Solutions (Lei Zhu) - [10 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - https://dat= atracker.ietf.org/doc/draft-yang-sfc-trace-issue-analysis/

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC: Subsc= riber & Host Identification Considerations (TBD) - [10 minutes]
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2= =A0 =C2=A0 =C2=A0 - https:/= /datatracker.ietf.org/doc/draft-sarikaya-sfc-hostid-serviceheader/

=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 - SFC Miscel= laneous Q&A (open-mic) - [5 minutes]


=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 02:25 Closing (WG-chairs) - [5 minutes]<= br>






---------- Forwarded message ----------
From:=C2=A0Kengo NAITO &= lt;k.naito@nttv6.jp>
To:=C2= =A0"Jim Guichard (jguichar)" <jguichar@cisco.com>
Cc:=C2=A0katsuhiro horiba <qoo@sfc.wide.ad.jp>, "sfc@ietf.org" <sfc@ietf.org>, "=E4=B9=85=E4=BF=9D=E8=81=A1=E4=B9=8B"= ; <toshiyuki.kubo@alaxala.= com>, Ayumu Yasuda <yasuda@ntt= v6.jp>, "=E4=B9=85=E4=BF=9D=E8=81=A1=E4=B9=8B" <toshiyuki.kubo@alaxala.net>, = Sekiya Yuji <sekiya@wide.ad.jp&= gt;, "=E6=9C=AC=E9=96=93=E4=BF=8A=E4=BB=8B" <homma.shunsuke@lab.ntt.co.jp>
Date= :=C2=A0Thu, 29 Oct 2015 09:02:45 +0900
Subject:=C2=A0Re: [sfc] SFC WG ag= enda slots - Yokohama
Hello Jim & Thomas,

I and some members from NSP consortium (which is one of the big organizatio= n in Japan who tests all kinds of network virtualization technologies) form= ed a team to test a running-code of SFC Proxy at the IETF hackathon.

https://www.ietf.org/registration/Meet= ingWiki/wiki/94hackathon

We would like to introduce our work to SFCers, and would like to ask you if= we can have a slot at SFC meeting in Yokohama.
I believe our work would be one good reference to improve SFC.

Best Regards,
Kengo

------------------------------------------------
Kengo NAITO
Technology Development
NTT Communications Corporation
Tel: +81-50-3813-6053
E-mail: k.naito@nttv6.jp
------------------------------------------------

> 2015/10/05 21:51=E3=80=81Jim Guichard (jguichar) <jguichar@cisco.com> =E3=81=AE=E3=83=A1=E3=83=BC= =E3=83=AB=EF=BC=9A
>
> Greetings WG:
>
> Our meeting in Yokohama is fast approaching. As always the goal of the= meeting will be to make the best use of our limited face-to-face time. Wit= h that in mind we welcome requests for agenda time.
>
> As we build the meeting agenda our goal will be to select presentation= s that best further the work of the WG, and that generally means focusing o= n key charter deliverables and topics with important open issues to resolve= . When making a request please consider what you think the WG should do wit= h its content =E2=80=93 for example:
>=C2=A0 =C2=A0 =C2=A0 =C2=A0=E2=80=A2 Does the document have useful cont= ent that should be moved into another WG document or progress on its own me= rit
>=C2=A0 =C2=A0 =C2=A0 =C2=A0=E2=80=A2 Does the content have a good basis= for one of the WG documents per the charter
>=C2=A0 =C2=A0 =C2=A0 =C2=A0=E2=80=A2 Should the document content be mer= ged with one or more other documents, so that a combined document could bec= ome a WG document
> Jim & Thomas
> _______________________________________________
> sfc mailing list
> sfc@ietf.org
> https://www.ietf.org/mailman/listinfo/sfc




---------- Forwarded message ----------
From:=C2=A0Xuxiaohu <= xuxiaohu@huawei.com>
To:= =C2=A0Thomas Narten <narten@us.ibm.= com>
Cc:=C2=A0"'mpls@ie= tf.org'" <mpls@ietf.org>, "mpls-chairs@tool= s.ietf.org" <mpls= -chairs@tools.ietf.org>, "'= sfc@ietf.org'" <sfc@ietf.or= g>, "sfc-chairs@to= ols.ietf.org" <sfc= -chairs@tools.ietf.org>
Date:=C2=A0Thu, 29 Oct 2015 01:40:38 +000= 0
Subject:=C2=A0Re: [sfc] New Version Notification for draft-xu-sfc-usin= g-mpls-spring-04.txt
Hi Thomas,

> -----Original Message-----
> From: Thomas Narten [mailto:narte= n@us.ibm.com]
> Sent: Thursday, October 29, 2015 12:22 AM
> To: Xuxiaohu
> Cc: 'sfc@ietf.org'; sfc-chairs@tools.ietf.org; '= mpls@ietf.org';
> mpls-chairs@tools.ietf.o= rg
> Subject: Re: New Version Notification for draft-xu-sfc-using-mpls-spri= ng-04.txt
>
> Hi Xiaohu.
>
> See below.
>
> > I haven't received any response from you yet. Would you pleas= e tell us
> > your thoughts on the new version of this draft. Thanks a lot.
>
> > Best regards, Xiaohu (on behalf of all co-authors)
> >
> > > -----Original Message----- From: Xuxiaohu Sent: Wednesday, S= eptember
> > > 09,
> > > 2015 5:45 PM To: 'sfc@ie= tf.org'; sfc-chairs@to= ols.ietf.org Cc:
> > > 'mpls@ietf.org'= ; mpls-chairs@tools.ietf.org<= /a> Subject: FW: New Version
> > > Notification for draft-xu-sfc-using-mpls-spring-04.txt
> > >
> > > Hi all,
> > >
> > > Service chaining is an important function for all type of ne= tworks
> > > including those using the source routing paradigm as specifi= ed by
> > > the SPRING working group.=C2=A0 This draft is especially foc= used on the
> > > SPRING/MPLS network scenario.
>
> > > When we posted the early versions (-00 to -02), the feedback= from
> > > the SFC working group chairs was that the solution required = changes
> > > to the MPLS architecture. We discussed this among the author= s and
> > > posted a new version
> > > (-03) that does not require any change to the MPLS Architect= ure anymore.
> > > Version -04 merely corrects some typos.
>
> Good that the document is now consistent with the MPLS architecture. >
> That said, this document is not really core to SFC. E.g., we are focus= ed on being
> transport independent. This document is MPLS-specific.

In this draft, the SFC encapsulation is implemented in the form of an MPLS = label stack (equivalent to NSH). Such SFC encapsulation could be transporte= d over any transport networks such as IPv4, IPv6, MPLS networks. In a words= , the SFC-encapsulation approach described in this draft is fully transport= -independent indeed.

> The key question is how relevant and important it is to the work of th= is WG. Our
> read of the mailing list discussions over recent months is that there = isn't strong
> interest in this work.

By encoding the SFP info by an MPLS label stack (i.e., implementing the SFC= encapsulation in the form of an MPLS label stack), SFF devices could be ea= sily implemented on existing MPLS devices without any change to their data = planes. As a result, there is no need to introduce a totally new SFC encaps= ulation scheme and accordingly there is no need to introduce a totally new = forwarding paradigm (e.g., NSH-based forwarding paradigm) especially when c= onsidering implementing SFFs on hardware platforms due to performance deman= ds.

According to the following statement quoted from the current SFC charter:
"... The WG will examine existing identifier schemes,
=C2=A0 if there is a need for such identifiers in the context of the Generi= c SFC
=C2=A0 encapsulation, before defining any new identifier scheme.
..."

It seems that this MPLS-SPRING-based SFC encapsulation scheme should be rel= evant to the SFC WG. At least, it could be investigated as a light-weight S= FC encapsulation approach (from the aspect of reducing and even avoiding an= y impact on the data plane).

Best regards,
Xiaohu

> Given the weak interest and lack=C2=A0 of clear importance to the WG c= ore
> deliverables, we do not see justification for taking this on as a WG d= ocument.
>
> Thomas & Jim
>
>
> > > Now we would like to ask the SFC chairs and WGs if the draft= can now
> > > be considered for adoption by the SFC working group.
>
>
>
> > >
> > > Best regards, Xiaohu
> > >
> > > > -----Original Message----- From: internet-drafts@ietf.org
> > > > [mailto:int= ernet-drafts@ietf.org] Sent: Wednesday, September 09,
> > > > 2015 5:23 PM To: Lizhenbin; Luis M. Contreras; Xuxiaohu= ; Himanshu
> > > > C. Shah; Xuxiaohu; Himanshu Shah; Luis M. Contreras; Li= zhenbin
> > > > Subject: New Version Notification for
> > > > draft-xu-sfc-using-mpls-spring-04.txt
> > > >
> > > >
> > > > A new version of I-D, draft-xu-sfc-using-mpls-spring-04= .txt has
> > > > been successfully submitted by Xiaohu Xu and posted to = the IETF
> > > repository.
> > > >
> > > > Name: draft-xu-sfc-using-mpls-spring Revision: 04 Title= : Service
> > > > Function Chaining Using MPLS-SPRING Document date: 2015= -09-09
> > > > Group: Individual Submission Pages: 7 URL:
> > > > https://www.ie= tf.org/internet-drafts/draft-xu-sfc-using-mpls-sprin
> > > > g-04
> > > > .txt Status:
> > > > https://datatrac= ker.ietf.org/doc/draft-xu-sfc-using-mpls-spring/ Htmlized:
> > > > https://tools.ietf.= org/html/draft-xu-sfc-using-mpls-spring-04 Diff:
> > > > https://www.= ietf.org/rfcdiff?url2=3Ddraft-xu-sfc-using-mpls-spring-0
> > > > 4
> > > >
> > > > Abstract:
> > > >=C2=A0 =C2=A0 Source Packet Routing in Networking (SPRIN= G) WG specifies a special
> > > >=C2=A0 =C2=A0 source routing mechanism.=C2=A0 Such sourc= e routing mechanism can be
> > > >=C2=A0 =C2=A0 leveraged to realize the service path laye= r functionality of the
> > > >=C2=A0 =C2=A0 service function chaining (i.e, steering t= raffic through a particular
> > > >=C2=A0 =C2=A0 service function path) by encoding the ser= vice function path or the
> > > >=C2=A0 =C2=A0 service function chain information as the = explicit path information.
> > > >=C2=A0 =C2=A0 This document describes how to leverage th= e MPLS-based source
> routing
> > > >=C2=A0 =C2=A0 mechanism as developed by the SPRING WG to= realize the service path
> > > >=C2=A0 =C2=A0 layer functionality of the service functio= n chaining.
> > > >
> > > >
> > > >
> > > >
> > > > Please note that it may take a couple of minutes from t= he time of
> > > > submission until the htmlized version and diff are avai= lable at
> > > > tools.ietf.org.
> > > >
> > > > The IETF Secretariat
> >




---------- Forwarded message ----------
From:=C2=A0<Dirk.von-Hugo@telekom.de>
To= :=C2=A0<narten@us.ibm.com>, = <pedroa.aranda@telefonic= a.com>
Cc:=C2=A0sfc@ietf.org<= br>Date:=C2=A0Thu, 29 Oct 2015 18:08:08 +0100
Subject:=C2=A0Re: [sfc] FW= : New Version Notification for draft-aranda-sf-dp-mobile-00.txt
Dear all= ,
I had a look at the draft and think it would be worth to elaborate further = on this - as already mentioned it tackles 5G issues which are expected to b= e of major interest to all mobile and 'integrated' operators.
Maybe you might also announce the draft to the newly created 5Gangip discus= sion list (https://www.ietf.org/mailman/listinfo/5gangi= p) to get helpful feedback.

First observations from my side:

Why is in the title named 'Dataplane' - don't you address both = DP and CP functions to be virtualized?

Sect. 1.3. and ch. 4 are very much similar ... this might be shortened.

In Ch. 2 shouldn't it read
As the specifications mature, we will provide the updates to the _evolved_ = LTE _-A/5G_ architecture. ?

Some nits found in sect.
=C2=A01.4:
i) Medium Access Control (MAC) =3D> ii) Medium Access Control (MAC)

2.1:
act on user traffic may depend not only depend on subscriber =3D>=C2=A0 = act on user traffic may depend not only on subscriber

3:
We except the RRC to be integrated =3D> We expect the RRC to be integrat= ed


Thanks and Best Regards
Dirk

-----Original Message-----
From: sfc [mailto:sfc-bounces@ietf.= org] On Behalf Of Thomas Narten
Sent: Mittwoch, 28. Oktober 2015 17:51
To: PEDRO ANDRES ARANDA GUTIERREZ
Cc: sfc@ietf.org
Subject: Re: [sfc] FW: New Version Notification for draft-aranda-sf-dp-mobi= le-00.txt

On Wed, 7 Oct 2015 05:41:20 +0000, PEDRO ANDRES ARANDA GUTIERREZ wrote:
> I=E2=80=99m requesting a slot to present this work. I recognise this i= s new
> and work in progress. However, I=E2=80=99m starting to see discussions=
> regarding the looks of future networks under the general =E2=80=985G= =E2=80=99 tag in
> most SDOs and there is a lot of talk of virtualising everything to the=
> radio access network. I think that SFC should, at the very least, be c= onsidered as part of the control plane.

Let's first see if we can get some discussion on this draft on the list= . If there is interest, we can consider a slot at the next IETF meeting.
Thomas & Jim

>
> Thanks, /PA
>
> PS: my excuses for possible multi-posting. I=E2=80=99m experiencing a = lot of
> problems with my email recetly --- Dr. Pedro A. Aranda Guti=C3=A9rrez<= br> >
> Technology Exploration - Network Innovation & Virtualisation email= :
> pedroa d0t aranda At telefonica d0t com Telef=C3=B3nica, Investigaci= =C3=B3n y
> Desarrollo C/
> Zurbar=C3=A1n,12 28010 Madrid, Spain
>
> Fragen sind nicht da, um beantwortet zu werden.=C2=A0 Fragen sind da, = um
> gestellt zu werden.=C2=A0 Georg Kreisler
>
>
>
>
> >
> >-----Mensaje original----- De: "internet-drafts@ietf.org" Fecha:
> >lunes, 5 de octubre de 2015, 7:53 Para: Walter Haeffner, DIEGO LOP= EZ
> >GARCIA, paag, DIEGO LOPEZ GARCIA, Walter Haeffner, paag Asunto: Ne= w
> >Version Notification for draft-aranda-sf-dp-mobile-00.txt
> >
> >>
> >>A new version of I-D, draft-aranda-sf-dp-mobile-00.txt has bee= n
> >>successfully submitted by Pedro A. Aranda and posted to the IE= TF repository.
> >>
> >>Name: draft-aranda-sf-dp-mobile Revision: 00 Title: Service Fu= nction
> >>Chaining Dataplane Elements in Mobile Networks Document date:<= br> > >>2015-10-05
> >>Group: Individual Submission Pages: 11 URL:
> >>https://www.ietf.or= g/internet-drafts/draft-aranda-sf-dp-mobile-00.tx
> >>t
> >>Status: https://datatracker.= ietf.org/doc/draft-aranda-sf-dp-mobile/
> >>Htmlized: https://tools.ietf.or= g/html/draft-aranda-sf-dp-mobile-00
> >>
> >>
> >>Abstract:
> >>=C2=A0 =C2=A0The evolution of the network towards 5G implies a= challenge for the
> >>=C2=A0 =C2=A0infrastructure. The targeted services and the ful= l deployment of
> >>=C2=A0 =C2=A0virtualization in all segments of the network wil= l need service function
> >>=C2=A0 =C2=A0chains that previously resided in the(local and r= emote) infrastructure of
> >>=C2=A0 =C2=A0the Network operators to extend to the radio acce= ss network (RAN).
> >>
> >>=C2=A0 =C2=A0The objective of this draft is to provide a non-e= xhaustive but
> >>=C2=A0 =C2=A0representative list of service functions in 4G an= d 5G networks. We base
> >>=C2=A0 =C2=A0on the problem statement [RFC 7498] and architect= ure framework [SFC-Arch]
> >>=C2=A0 =C2=A0of the working group, as well on the existing mob= ile networks use cases
> >>=C2=A0 =C2=A0[SFC-mobile-uc] and the requirement gathering pro= cess of different
> >>=C2=A0 =C2=A0initiatives around the world [5GPPP, IMT2020, 5G-= FK, IMT2020-CN ] to
> >>=C2=A0 =C2=A0anticipate network elements that will be needed i= n 5G networks.
> >>
> >>
> >>
> >>
> >>
> >>
> >>Please note that it may take a couple of minutes from the time= of
> >>submission until the htmlized version and diff are available a= t to= ols.ietf.org.
> >>
> >>The IETF Secretariat
> >>
>
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Halpern" , "Jim Guichard \(jguichar\)" Subject: [sfc] Chairing of SFC meeting in Yokohama X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Oct 2015 20:14:20 -0000 Neither Jim nor I will be in Yokohama for IETF 94. Joel Halpern and Carlos Pignataro have graciously agreed to chair the Yokohama SFC meeting. (Thanks!) For presenters, please be sure to send presentations to Jim and myself so that we can upload them properly for remote participants before the meeting (Joel and Carlos don't have credentials to do that). For other questions or issues, please contact all four of us so that we may best assist you. Thomas & Jim From nobody Fri Oct 30 15:10:37 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D54C71A90FF for ; Fri, 30 Oct 2015 13:33:13 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -6.911 X-Spam-Level: X-Spam-Status: No, score=-6.911 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id RjN1W7AKy__0 for ; Fri, 30 Oct 2015 13:33:12 -0700 (PDT) Received: from e33.co.us.ibm.com (e33.co.us.ibm.com [32.97.110.151]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 2E63E1A9092 for ; Fri, 30 Oct 2015 13:33:12 -0700 (PDT) Received: from localhost by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 30 Oct 2015 14:33:11 -0600 Received: from d03dlp03.boulder.ibm.com (9.17.202.179) by e33.co.us.ibm.com (192.168.1.133) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Fri, 30 Oct 2015 14:33:10 -0600 X-IBM-Helo: d03dlp03.boulder.ibm.com X-IBM-MailFrom: narten@us.ibm.com X-IBM-RcptTo: mpls@ietf.org;sfc@ietf.org Received: from b03cxnp07029.gho.boulder.ibm.com (b03cxnp07029.gho.boulder.ibm.com [9.17.130.16]) by d03dlp03.boulder.ibm.com (Postfix) with ESMTP id C292C19D8042; Fri, 30 Oct 2015 14:21:18 -0600 (MDT) Received: from d03av04.boulder.ibm.com (d03av04.boulder.ibm.com [9.17.195.170]) by b03cxnp07029.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t9UKX9nA11665848; Fri, 30 Oct 2015 13:33:09 -0700 Received: from d03av04.boulder.ibm.com (loopback [127.0.0.1]) by d03av04.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t9UKX9Jc025176; Fri, 30 Oct 2015 14:33:09 -0600 Received: from cichlid.raleigh.ibm.com ([9.80.96.118]) by d03av04.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t9UKX7nb025081 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 30 Oct 2015 14:33:09 -0600 Received: from cichlid.raleigh.ibm.com.us.ibm.com (localhost.localdomain [127.0.0.1]) by cichlid.raleigh.ibm.com (8.14.4/8.12.5) with ESMTP id t9UKX6h8015866; Fri, 30 Oct 2015 16:33:07 -0400 Date: Fri, 30 Oct 2015 16:33:06 -0400 Message-ID: From: Thomas Narten To: Xuxiaohu In-Reply-To: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB3E2EE@NKGEML512-MBS.china.huawei.com> References: <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB3DFAF@NKGEML512-MBS.china.huawei.com> <1FEE3F8F5CCDE64C9A8E8F4AD27C19EE0CB3E2EE@NKGEML512-MBS.china.huawei.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL/10.8 EasyPG/1.0.0 Emacs/23.1 (x86_64-redhat-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15103020-0009-0000-0000-00000F5D4DA4 Archived-At: Cc: "'mpls@ietf.org'" , "mpls-chairs@tools.ietf.org" , "'sfc@ietf.org'" , "sfc-chairs@tools.ietf.org" Subject: Re: [sfc] New Version Notification for draft-xu-sfc-using-mpls-spring-04.txt X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 30 Oct 2015 20:33:14 -0000 > According to the following statement quoted from the current SFC charter: > > "... The WG will examine existing identifier schemes, > if there is a need for such identifiers in the context of the Generic SFC > encapsulation, before defining any new identifier scheme. > ..." > > It seems that this MPLS-SPRING-based SFC encapsulation scheme should be > relevant to the SFC WG. At least, it could be investigated as a light-weight > SFC encapsulation approach (from the aspect of reducing and even avoiding any > impact on the data plane). The charter also says: 3. Generic SFC Encapsulation: This document will describe a single service-level data plane encapsulation format that: I want to emphasize the term "a single ... encapsulation format" It has been my understanding that the intention of this WG from the beginning was to produce one encapsulation, not multiple ones. I think it has been clear for some time already that the WG has selected the NSH document as its desired approach. Are you suggesting that the WG take on this document as an additional encapsulation for SFC? I do not think that is consistent with the intent of the charter. Also, my read of the overall list discussion with respect to this document is that the WG has not shown a strong interest in this document nor indicated a compelling need for it. If the WG disagrees with this assessment, I expect folk would speak up. Thomas From nobody Sat Oct 31 12:12:03 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9DD5B1B2E37; Mon, 19 Oct 2015 15:57:52 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -106.912 X-Spam-Level: X-Spam-Status: No, score=-106.912 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_RP_MATCHES_RCVD=-0.01, USER_IN_WHITELIST=-100] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FkOHYT9iVKML; Mon, 19 Oct 2015 15:57:46 -0700 (PDT) Received: from rfc-editor.org (rfc-editor.org [4.31.198.49]) by ietfa.amsl.com (Postfix) with ESMTP id 7CD0D1ACE71; Mon, 19 Oct 2015 15:57:43 -0700 (PDT) Received: by rfc-editor.org (Postfix, from userid 30) id B5ADC187DBF; Mon, 19 Oct 2015 15:57:14 -0700 (PDT) To: ietf-announce@ietf.org, rfc-dist@rfc-editor.org X-PHP-Originating-Script: 1005:ams_util_lib.php From: rfc-editor@rfc-editor.org Message-Id: <20151019225714.B5ADC187DBF@rfc-editor.org> Date: Mon, 19 Oct 2015 15:57:14 -0700 (PDT) Archived-At: X-Mailman-Approved-At: Sat, 31 Oct 2015 12:12:01 -0700 Cc: sfc@ietf.org, rfc-editor@rfc-editor.org Subject: [sfc] RFC 7665 on Service Function Chaining (SFC) Architecture X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 19 Oct 2015 22:57:52 -0000 A new Request for Comments is now available in online RFC libraries. RFC 7665 Title: Service Function Chaining (SFC) Architecture Author: J. Halpern, Ed., C. Pignataro, Ed. Status: Informational Stream: IETF Date: October 2015 Mailbox: jmh@joelhalpern.com, cpignata@cisco.com Pages: 32 Characters: 74825 Updates/Obsoletes/SeeAlso: None I-D Tag: draft-ietf-sfc-architecture-11.txt URL: https://www.rfc-editor.org/info/rfc7665 DOI: http://dx.doi.org/10.17487/RFC7665 This document describes an architecture for the specification, creation, and ongoing maintenance of Service Function Chains (SFCs) in a network. It includes architectural concepts, principles, and components used in the construction of composite services through deployment of SFCs, with a focus on those to be standardized in the IETF. This document does not propose solutions, protocols, or extensions to existing protocols. This document is a product of the Service Function Chaining Working Group of the IETF. INFORMATIONAL: This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. This announcement is sent to the IETF-Announce and rfc-dist lists. To subscribe or unsubscribe, see https://www.ietf.org/mailman/listinfo/ietf-announce https://mailman.rfc-editor.org/mailman/listinfo/rfc-dist For searching the RFC series, see https://www.rfc-editor.org/search For downloading RFCs, see https://www.rfc-editor.org/rfc.html Requests for special distribution should be addressed to either the author of the RFC in question, or to rfc-editor@rfc-editor.org. Unless specifically noted otherwise on the RFC itself, all RFCs are for unlimited distribution. The RFC Editor Team Association Management Solutions, LLC From nobody Sat Oct 31 12:12:04 2015 Return-Path: X-Original-To: sfc@ietfa.amsl.com Delivered-To: sfc@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id D5C4D1AC444 for ; Wed, 21 Oct 2015 09:43:14 -0700 (PDT) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -0.03 X-Spam-Level: X-Spam-Status: No, score=-0.03 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, HELO_EQ_IT=0.635, HOST_EQ_IT=1.245, T_RP_MATCHES_RCVD=-0.01] autolearn=no Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0g2bRKcVXuOU for ; Wed, 21 Oct 2015 09:43:12 -0700 (PDT) Received: from av6.sf-csiaf.unifi.it (av6.sf-csiaf.unifi.it [150.217.6.212]) by ietfa.amsl.com (Postfix) with ESMTP id A45AD1A9163 for ; Wed, 21 Oct 2015 09:43:09 -0700 (PDT) Received: from av6.sf-csiaf.unifi.it (av6 [127.0.0.1]) by localhost (Postfix) with SMTP id A47773000D1 for ; Wed, 21 Oct 2015 18:43:08 +0200 (CEST) Received: from [192.168.9.61] (radar2.dinfo.unifi.it [150.217.8.31]) (Authenticated sender: paganelli) by av6.sf-csiaf.unifi.it (Postfix) with ESMTPSA id A86AA3000DB for ; Wed, 21 Oct 2015 18:43:05 +0200 (CEST) To: sfc@ietf.org From: "federica.paganelli@unifi.it" Message-ID: <5627BF57.90301@unifi.it> Date: Wed, 21 Oct 2015 18:37:43 +0200 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Archived-At: X-Mailman-Approved-At: Sat, 31 Oct 2015 12:12:01 -0700 Subject: [sfc] CFP for First IEEE International Workshop on Orchestration for Software-Defined Infrastructures X-BeenThere: sfc@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Network Service Chaining List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 21 Oct 2015 16:43:15 -0000 ------------------------------------------------------------------------- Please accept our apologies if you receive multiple copies of this CFP ------------------------------------------------------------------------- CALL FOR PAPERS First IEEE International Workshop on Orchestration for Software-Defined Infrastructures (O4SDI 2016) To be held in conjunction with the IEEE International Conference on Communications (ICC 2016) May 23-27, 2016 - Kuala Lumpur, Malaysia http://icc2016.ieee-icc.org/cfw http://www.o4sdi.unibo.it#workshop ------------------------------------------------------------------------- IMPORTANT DATES Paper submission deadline: December 4, 2015 Acceptance notification: February 21, 2016 Camera-ready papers: March 13, 2016 SUBMISSION INFORMATION Paper submissions will be handled on-line through the EDAS system. Further information will be soon available at http://icc2016.ieee-icc.org/cfw ----------------------------------------------------------------------- SCOPE The current convergence between computing and networking eco-systems clearly shows that software will play an unprecedented dominant role in future communication environments. Computing, storage, and connectivity services will be deployed as generalized virtual functions within a software-defined infrastructure composed of a "fog" of micro-clouds, typically located at the edge of the network. Suitable orchestration mechanisms must then be devised to facilitate the live deployment and dynamic lifecycle management of these virtual elements, at the application level, the server level, and the network level, within a single domain and across multiple domains. Open issues that must still be addressed include: unified management of computing, storage, and network resources; abstraction models and open standard interfaces; adaptation and optimization mechanisms to be enforced at global and/or local levels. The First IEEE International Workshop on Orchestration for Software- Defined Infrastructures (O4SDI) aims at providing an international forum for researchers and practitioners to discuss and address the challenges that must be faced in order to facilitate orchestration and programmability of generalized virtual functions in Software Defined Infrastructures (SDI). The workshop welcomes contributions from both computing and network-oriented research communities, with the aim of facilitating interdisciplinary discussion, cross-fertilization and exchange of ideas and best practices. ------------------------------------------------------------------------- TOPICS OF INTEREST Due to the highly interdisciplinary scope of the workshop, contributions are expected from both computer science and communications areas. Works that discuss lessons learnt and best practices, describe practical deployment and implementation experiences, and/or demonstrate innovative use-cases are especially encouraged for presentation in the workshop. We are particularly interested in papers that cover, but are not limited to, the following topics: - single domain and cross domain orchestration issues - integrated network and computing resource control and management - control and abstraction of heterogeneous networks - orchestration in SDN/NFV - orchestration for next-generation IP and optical networks - QoS/QoE in software-defined infrastructures - orchestration for high-availability and resilience in software-defined infrastructures - network programmability for service chaining - run-time orchestration - dynamic service composition and delivery - software engineering and operating systems techniques applied to orchestration - description, specification, and abstraction languages for orchestration - optimal orchestration algorithms - context-aware orchestration - functional architectures of orchestrating elements - testbed experiments on orchestrations - performance evaluation of orchestration elements - standardization issues in orchestration O4SDI 2016 will also feature a panel discussing "Orchestration in the context of Software Defined Infrastructures," as well as invited talks. Dr. Stuart Clayman, University College London, will moderate the panel and will also give a talk about the role of abstractions in software which will be particularly important for network orchestration, one of the most important interdisciplinary aspects of the workshop theme. ------------------------------------------------------------------------- WORKSHOP CO-CHAIRS Walter Cerroni, University of Bologna, Italy – walter.cerroni@unibo.it Barbara Martini, CNIT, Pisa, Italy – barbara.martini@cnit.it Federica Paganelli, CNIT, Firenze, Italy – federica.paganelli@cnit.it Additional information on the O4SDI initiative can be found at: http://www.o4sdi.unibo.it ------------------------------------------------------------------------- AUTHOR GUIDELINES Prospective authors are invited to submit high-quality, original technical papers for presentation at the workshop and publication in the IEEE O4SDI 2016 Proceedings and IEEE Xplore. All final submissions should be written in English with a maximum paper length of six (6) printed pages (10-point font). Papers are reviewed on the basis that they do not contain plagiarized material and have not been submitted to any other conference at the same time (double submission). At least one co-author/author of an accepted paper MUST register and present the paper at the workshop for the paper to appear on IEEE Xplore. For additional author guidelines, please refer to: http://icc2016.ieee-icc.org/content/authors-guidelines -- Federica Paganelli, PhD CNIT Researcher Dept. of Electronics and Telecommunications via S. Marta 3 50139 Firenze tel. +39 055 2758596 cell. +39 349 8843383 email: federica.paganelli@cnit.it, federica.paganelli@unifi.it webpage: http://lrst.dinfo.unifi.it/people/Paganelli/index.html

Thanks for the detailed comments Tal

 

Replies inline

 

 

BR Rory

 

From: Tal Mizrahi [mailto:talmi@marvell.com] =
Sent: Sunday, October 25, 2015 12:49 PM
To: Browne, Rory; sfc@ietf.org; tictoc@ietf.org
Subject: RE: NSH Timestamp

 

Hi Rory,

 

I believe that in-band= timestamps can certainly be a useful feature in NSH.

 

Major comments:

1.&n= bsp;     The draft curr= ently does not clarify the use case. While the draft describes how the time= stamp is inserted into the NSH, I could not find a description of how the t= imestamp is *used*, and what is the expected accuracy. It is hard to assess whether the solution is adequate w= ithout understanding the requirement.

 

RB: We want to be able= to tell if a VNF or and underlay segment is misbehaving on subscriber traf= fic. Expected accuracy in the low 10s of microseconds.

 

2.&n= bsp;     Why does the d= raft mandate specific synchronization protocols (NTP, Sync-E, PTP)? It seem= s that if you are defining an NSH timestamp TLV, you can avoid limiting the= solution, and leave the synchronization protocol out of scope.

 

RB: True. We will cons= ider this on next iteration.

 

3.&n= bsp;     The timestamp = formats are not clearly defined. Specifically, the term "UTC format&qu= ot; is used throughout the document. I believe UTC defines a time reference= , not a timestamp format. Did you mean NTP Timestamp format / PTP Timestamp format / RFC 3339 / other?

 

RB: Sorry – slop= py on our behalf. Yes NTP timestamp format as per section 6 of RFC5905=

 

Other comments:

 

·        Section 3.1:

You require bot= h Synchronous Ethernet (2), and IEEE 1588 for frequency distribution (3). T= hese seem like two overlapping requirements. Why do you require both? Perha= p you meant that IEEE 1588 should be used for *time* distribution?

 

RB: No we require either

 

·        Could you expl= ain why you require very accurate frequency synchronization, but inaccurate= time synchonization (section 3.1)?

 

RB: The time of day us= ed at the start of the header does not have to be very accurate (Can be 10&= #8217;s of ms out for example) the PTP needs to me more accurate (in 10s of= microsecond range)

 

·        The format of = the fields "UTC Reference", "Ingress Timestamp", and &q= uot;Egress Timestamp" is not clear.

RB: Can you explain

 

·        Section 3: the= terms SCL and FTSN are used before they are defined. SCL is not defined at= all. I guess you mean Service Classifier, but this should be specified.

 

RB: FTSN is defined (c= ould be improved though) before usage I think. SCL should be defined  = - agreed.

 

·        The terms &quo= t;time stamp" and "timestamp" are used intermittently. I bel= ieve "timestamp" is the most common form in IETF documents.<= /o:p>

 

RB: Noted. Will fix th= is in next revision

 

·        "The FTSN= also writes the UTC value into the header so the" - this sentence is = not clear at this point.

 

RB: FTSN writes NTP fo= rmat into the header

 

·        The terms NTP = and IEEE 1588 are used without a reference to the relevant standards.<= /o:p>

 

RB: Thanks We will ref= erence standards in next revision

 

·        Could you plea= se clarify the following sentence:
     "the UTC stamp is merely being used as a refe= rence inserted into
      the TSDB for performance monitoring. It is n= ot a reference for the
      timestamp itself."

 

RB: The NTP stamp is b= eing used by performance management system (PMS) to identify when the monit= oring of the flow begun. This is held in the TSDB and may be retrieved by t= he PMS for trend analysis of SC performance.

 

Regards,

Tal.=

 

 

From: sfc [mailto:sfc-bounces@ietf.org] On Behalf Of Browne, Rory
Sent: Friday, October 23, 2015 7:45 PM
To: sfc@ietf.org
Subject: [sfc] NSH Timestamp

 

Please see below a link to a draft on performance mo= nitoring of service chains using NSH

 

https://tools.ietf.org/html/draft-browne-ietf-sf= c-nsh-timestamp-00

 

Comments welcome

 

BR Rory

 

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