From nobody Mon Nov 2 00:16:17 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9278C1A1B29; Mon, 2 Nov 2015 00:16:14 -0800 (PST) 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 OOj5SY2uBFDC; Mon, 2 Nov 2015 00:16:12 -0800 (PST) Received: from rcdn-iport-4.cisco.com (rcdn-iport-4.cisco.com [173.37.86.75]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 30F761A9170; Mon, 2 Nov 2015 00:16:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=1930; q=dns/txt; s=iport; t=1446452172; x=1447661772; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=zISXITe6lgMmnx5pTc3bONYmsrq2UmiJXp1Z6bIaX2Q=; b=lSj7SZe5f1tU7P7vib9FDpQ2OATzh9cj3NEcLCT5VmeUmNwfecbjzvib /8FhghJOXO0eo7fR1r4Nmf4cHhobD8WTwf28ng28yY9eXpKjvtEJwWeSl +BNLgH6f4efOYCEV+LNmV/e2ohKewcFTx9QvsHp8AbjdEp9N0w4pvZkkw Y=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0AeAgCeGjdW/4ENJK1egztTbwa/NgENgVoXCoV4AhyBDTgUAQEBAQEBAYEKhDUBAQEDAQEBASAROgsFCwIBCBgCAiYCAgIlCxUQAQEEDgWIKAgNsEKQWAEBAQEBAQEBAQEBAQEBAQEBAQEBARQEgSKFVYIQgm6HezGBFAEElkMBjSScOQEfAQFCghEdFoFAcoR3gQcBAQE X-IronPort-AV: E=Sophos;i="5.20,233,1444694400"; d="scan'208";a="43000517" Received: from alln-core-9.cisco.com ([173.36.13.129]) by rcdn-iport-4.cisco.com with ESMTP; 02 Nov 2015 08:16:11 +0000 Received: from XCH-RTP-008.cisco.com (xch-rtp-008.cisco.com [64.101.220.148]) by alln-core-9.cisco.com (8.14.5/8.14.5) with ESMTP id tA28GA3u025538 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Mon, 2 Nov 2015 08:16:11 GMT Received: from xch-rtp-010.cisco.com (64.101.220.150) by XCH-RTP-008.cisco.com (64.101.220.148) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Mon, 2 Nov 2015 03:16:10 -0500 Received: from xch-rtp-010.cisco.com ([64.101.220.150]) by XCH-RTP-010.cisco.com ([64.101.220.150]) with mapi id 15.00.1104.000; Mon, 2 Nov 2015 03:16:10 -0500 From: "Stefano Previdi (sprevidi)" To: Lizhenbin Thread-Topic: [Pce] Solicit Comments on draft-li-spring-tunnel-segment-00 and draft-li-pce-tunnel-segment-00 Thread-Index: AdEUbsVrrzrcOCTPSMquLzMmIS+JkwBAd08A Date: Mon, 2 Nov 2015 08:16:10 +0000 Message-ID: <779EF7E7-FC53-4BE0-94E4-374618483A12@cisco.com> References: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA5EE97@nkgeml506-mbx.china.huawei.com> In-Reply-To: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA5EE97@nkgeml506-mbx.china.huawei.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: [10.61.99.112] Content-Type: text/plain; charset="utf-8" Content-ID: <02C5900B69BE8946B0AEA5FD9DAB9FC2@emea.cisco.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: "spring@ietf.org" , "Clarence Filsfils \(cfilsfil\)" , "Siva Sivabalan \(msiva\)" , "Chenxia \(D\)" , "Wunan \(Eric\)" , "pce@ietf.org" Subject: Re: [spring] [Pce] Solicit Comments on draft-li-spring-tunnel-segment-00 and draft-li-pce-tunnel-segment-00 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Nov 2015 08:16:14 -0000 SeKAmWQgc3VnZ2VzdCB5b3UgdG8gaGF2ZSBhIGxvb2sgYXQgZHJhZnQtc2l2YWJhbGFuLXBjZS1i aW5kaW5nLWxhYmVsLXNpZC0wMC50eHQNCg0KVGhhbmtzLg0Kcy4NCg0KDQo+IE9uIE5vdiAxLCAy MDE1LCBhdCA3OjM5IEFNLCBMaXpoZW5iaW4gPGxpemhlbmJpbkBodWF3ZWkuY29tPiB3cm90ZToN Cj4gDQo+IEhpIEZvbGtzLA0KPiBXZSBwcm9wb3NlcyB0d28gZHJhZnRzIG9uIHRoZSBuZXcgdHlw ZSBvZiBzZWdtZW50IGluIHRoZSBzZWdtZW50IHJvdXRpbmc6IGRyYWZ0LWxpLXNwcmluZy10dW5u ZWwtc2VnbWVudC0wMCBhbmQgZHJhZnQtbGktcGNlLXR1bm5lbC1zZWdtZW50LTAwLg0KPiAtLSBk cmFmdC1saS1zcHJpbmctdHVubmVsLXNlZ21lbnQtMDAgcHJvcG9zZXMgdGhlIHBvc3NpYmxlIHVz ZWNhc2VzIHN1Y2ggYXMgcmVkdWNlIFNJRCBzdGFjayBkZXB0aCBvZiBTUiBwYXRoLCBzcGFuIHRo ZSBub24tU1IgZG9tYWluIG9yIHByb3ZpZGUgZGlmZmVyZW50aWF0ZWQgc2VydmljZXMuIFRoaXMg ZG9jdW1lbnQgYWxzbyBwcm9wb3NlcyB0aGUgZGlmZmVyZW5jZSBiZXR3ZWVuIHRoZSBhZGphY2Vu Y3kgc2VnbWVudCBhbmQgdGhlIHR1bm5lbCBzZWdtZW50LiBUaGVzZSB3b3JrIHdpbGwgaGVscCB0 byB1bmRlcnN0YW5kIHRoZSBuZWNlc3NpdHkgYW5kIGFkdmFudGFnZXMgb2YgdHVubmVsIHNlZ21l bnQgaW4gc29tZSBhcHBsaWNhdGlvbiBzY2VuYXJpb3MuIFRoZW4gd2UgZGVmaW5lIHRoZSBmb3J3 YXJkaW5nIG1lY2hhbmlzbSBhbmQgcHJvdG9jb2wgZXh0ZW5zaW9ucyByZXF1aXJlbWVudHMgb24g dHVubmVsIHNlZ21lbnQuDQo+IC0tIGRyYWZ0LWxpLXBjZS10dW5uZWwtc2VnbWVudC0wMCBwcm9w b3NlcyB0aGUgcG9zc2JpbGUgUENFUCBwcm90b2NvbCBleHRlbnNpb25zIGZvciB0aGUgdHVubmVs IHNlZ21lbnQgYmFzZWQgb24gZHJhZnQtbGktc3ByaW5nLXR1bm5lbC1zZWdtZW50LTAwLiBUaGUg cHJvdG9jb2wgZXh0ZW5zaW9ucyBhcmUgaW50cm9kdWNlZCBmb3IgdHdvIGRpZmZlcmVudCBhcHBs aWNhdGlvbnM6IDEuIFBDRVAgZXh0ZW5zaW9zbiBmcm9tIFBDQyB0byBQQ0U7IDIuIFBDRVAgZXh0 ZW5zaW9ucyBmcm9tIFBDRSB0byBQQ0MuIA0KPiAgDQo+IEhvcGUgeW91IGNvdWxkIGhhdmUgaW50 ZXJlc3QgaW4gdGhlc2UgZHJhZnRzLCBoZWxwIHJldmlldyBvciByZWZpbmUuIFlvdSBjb21tZW50 cyB3aWxsIGJlIGFwcHJlY2lhdGVkLg0KPiAgDQo+ICANCj4gIA0KPiBUaGFua3MgJiBSZWdhcmRz LA0KPiBaaGVuYmluIChSb2JpbikNCj4gX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX18NCj4gUGNlIG1haWxpbmcgbGlzdA0KPiBQY2VAaWV0Zi5vcmcNCj4gaHR0 cHM6Ly93d3cuaWV0Zi5vcmcvbWFpbG1hbi9saXN0aW5mby9wY2UNCg0K From nobody Mon Nov 2 17:21:52 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 2CBF61ACD95 for ; Mon, 2 Nov 2015 17:21:51 -0800 (PST) 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 w4tUSgDRdB0i for ; Mon, 2 Nov 2015 17:21:48 -0800 (PST) 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 09C6E1ACD81 for ; Mon, 2 Nov 2015 17:21:47 -0800 (PST) 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 BZV62938; Tue, 03 Nov 2015 01:21:45 +0000 (GMT) Received: from nkgeml409-hub.china.huawei.com (10.98.56.40) by lhreml403-hub.china.huawei.com (10.201.5.217) with Microsoft SMTP Server (TLS) id 14.3.235.1; Tue, 3 Nov 2015 01:21:44 +0000 Received: from NKGEML506-MBX.china.huawei.com ([169.254.3.20]) by nkgeml409-hub.china.huawei.com ([10.98.56.40]) with mapi id 14.03.0235.001; Tue, 3 Nov 2015 09:21:37 +0800 From: Lizhenbin To: "spring@ietf.org" Thread-Topic: Implementation Report on draft-ietf-spring-segment-routing-ldp-interop Thread-Index: AQHRFdX75NXDqyLenEuz0po0oqbOjg== Date: Tue, 3 Nov 2015 01:21:36 +0000 Message-ID: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA61266@nkgeml506-mbx.china.huawei.com> Accept-Language: zh-CN, en-US Content-Language: zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.194.185.169] Content-Type: multipart/alternative; boundary="_000_5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA61266nkgeml506mbxchi_" MIME-Version: 1.0 X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090201.56380C2A.0013, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=169.254.3.20, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: de95779b20f0cf3e6447a82f2805a94f Archived-At: Subject: [spring] Implementation Report on draft-ietf-spring-segment-routing-ldp-interop X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." 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Hi Folks,

I proposed my concern on the implementation of interoperability between = LDP and SR again in IETF. I also would like to remind you of my draft again= :

https://tools.ietf.org/html/draft-li-spring-compare-sr-ldp-rsvpte-= 00

In this draft I explained the possible challenges of SR comparing LDP. A= nd in sec 6 I summary the possible challenge of Interoperability between SR= and LDP/RSVP-TE. Until now I believe that there will be much challege for = the implementation. In fact in order to solve the possbile issue I mentioned in the draft, the mapping server h= as been introduced. Is it some central-control based solution in the IGP/LD= P distributed environment? I worried that there still more issues which hav= e to be solved and propose great challenge for the implementor on the feature and when new mechanisms are i= ntroduced they will propose new challenges again. If so, this may be nightm= are for the developer of the feature. Hope if there were the implementation= the implementation report on draft-ietf-spring-segment-routing-ldp-interop= -00 can be publised accomanying the draft to demonstrate what can be done and = maye what can not be done. This will be much helpful to the implementors an= d operators to consider their possible choice to cope with this interop iss= ue: take the challenge, leave it or replace the LDP network with SR all at once without introducing the intero= perability issue.

 

 

Best Regards,

Zhenbin(Robin)

--_000_5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA61266nkgeml506mbxchi_-- From nobody Mon Nov 2 21:08:46 2015 Return-Path: X-Original-To: spring@ietf.org Delivered-To: spring@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 8E50F1B2CEF for ; Mon, 2 Nov 2015 20:10:55 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: X-Test-IDTracker: no X-IETF-IDTracker: 6.8.0 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <20151103041055.21925.37188.idtracker@ietfa.amsl.com> Date: Mon, 02 Nov 2015 20:10:55 -0800 From: IETF Secretariat Archived-At: X-Mailman-Approved-At: Mon, 02 Nov 2015 21:08:45 -0800 Subject: [spring] Milestones changed for spring WG X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Nov 2015 04:10:55 -0000 Changed milestone "One or more documents describing SPRING use cases.", set due date to November 2014 from July 2014, resolved as "Done", added draft-ietf-spring-problem-statement to milestone. URL: https://datatracker.ietf.org/wg/spring/charter/ From nobody Mon Nov 2 21:08:48 2015 Return-Path: X-Original-To: spring@ietf.org Delivered-To: spring@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id 2B7C51B2DFD for ; Mon, 2 Nov 2015 20:53:06 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: X-Test-IDTracker: no X-IETF-IDTracker: 6.8.0 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <20151103045306.23784.28949.idtracker@ietfa.amsl.com> Date: Mon, 02 Nov 2015 20:53:06 -0800 From: IETF Secretariat Archived-At: X-Mailman-Approved-At: Mon, 02 Nov 2015 21:08:45 -0800 Subject: [spring] Milestones changed for spring WG X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Nov 2015 04:53:06 -0000 Deleted milestone "Specification of any required new procedures to support SPRING use cases.". Deleted milestone "Management requirements document.". Changed milestone "One or more control protocol extensions requirements documents. ", set due date to December 2015 from July 2015, added draft-ietf-spring-segment-routing to milestone. Changed milestone "Specification of a high-level abstract architecture for SPRING.", set due date to December 2015 from November 2014, added draft-ietf-spring-segment-routing to milestone. Changed milestone "Document inter-working and co-existence between the new procedures and the existing signalling and routing protocols.", set due date to April 2016 from November 2015, added draft-ietf-spring-segment-routing-ldp-interop to milestone. Changed milestone "Requirements for modifications if any to IPv6 architecture to support SPRING use cases.", set due date to April 2016 from January 2015, added draft-ietf-spring-ipv6-use-cases, draft-ietf-spring-segment-routing, draft-previdi-6man-segment-routing-header to milestone. Changed milestone "Requirements for modifications if any to MPLS architecture to support SPRING use cases.", set due date to April 2016 from December 2014, added draft-ietf-spring-segment-routing-mpls to milestone. Changed milestone "Specify the OAM mechanisms needed to support SPRING.", set due date to August 2016 from November 2015, added draft-ietf-spring-sr-oam-requirement, draft-kumarkini-mpls-spring-lsp-ping to milestone. Changed milestone "Recharter or close WG.", set due date to November 2016 from February 2016. URL: https://datatracker.ietf.org/wg/spring/charter/ From nobody Mon Nov 2 21:10:54 2015 Return-Path: X-Original-To: spring@ietf.org Delivered-To: spring@ietfa.amsl.com Received: from ietfa.amsl.com (localhost [IPv6:::1]) by ietfa.amsl.com (Postfix) with ESMTP id DF7E81B2E6E for ; Mon, 2 Nov 2015 21:10:52 -0800 (PST) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit To: X-Test-IDTracker: no X-IETF-IDTracker: 6.8.0 Auto-Submitted: auto-generated Precedence: bulk Message-ID: <20151103051052.2703.26617.idtracker@ietfa.amsl.com> Date: Mon, 02 Nov 2015 21:10:52 -0800 From: IETF Secretariat Archived-At: Subject: [spring] Milestones changed for spring WG X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Nov 2015 05:10:53 -0000 Changed milestone "One or more documents describing SPRING use cases.", set due date to November 2015 from November 2014. URL: https://datatracker.ietf.org/wg/spring/charter/ From nobody Tue Nov 3 07:23:44 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 611AD1A1EFE; Tue, 3 Nov 2015 07:23:43 -0800 (PST) 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 DQ0uFwNoaskO; Tue, 3 Nov 2015 07:23:41 -0800 (PST) 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 B71491A1EF7; Tue, 3 Nov 2015 07:23:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=10018; q=dns/txt; s=iport; t=1446564220; x=1447773820; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=H73psq39cXqxPvW1vmQlljsOGB8mnGO8diL4tny8mE4=; b=NROy/SAK6GEnRttWCWy9457nz59notivZPZIAMpyRTOfab/8Frgj8TsC g9ZT31rclEhNmM1wcvjNCnE6k/0eJAaeSPjVnxr8lx3DHHPJFoHX0wZMY aFtbUQeiJR+/arwPE7lowg9OmfWqVKD42pW37/C5UikqahlzuaXp8/BJy s=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D+AQBU0ThW/4kNJK1egztTbwa9SQENgV0XCoVzAhyBHjgUAQEBAQEBAYEKhDUBAQEDAQEBASAROgsFCwIBCBgCAiYCAgIlCxUQAgQOBYgmCA2wVZByAQEBAQEBAQEBAQEBAQEBAQEBAQEBFASBEIVUghCCboRxgwUxgRQFh0SPAgGIDIUWgVqSEYhSAR8BAUKCER2BVnKEd4EHAQEB X-IronPort-AV: E=Sophos;i="5.20,239,1444694400"; d="scan'208";a="47216023" Received: from alln-core-4.cisco.com ([173.36.13.137]) by rcdn-iport-1.cisco.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 03 Nov 2015 15:23:16 +0000 Received: from XCH-RTP-006.cisco.com (xch-rtp-006.cisco.com [64.101.220.146]) by alln-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id tA3FNFOv014307 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Tue, 3 Nov 2015 15:23:16 GMT Received: from xch-rtp-010.cisco.com (64.101.220.150) by XCH-RTP-006.cisco.com (64.101.220.146) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Tue, 3 Nov 2015 10:23:14 -0500 Received: from xch-rtp-010.cisco.com ([64.101.220.150]) by XCH-RTP-010.cisco.com ([64.101.220.150]) with mapi id 15.00.1104.000; Tue, 3 Nov 2015 10:23:14 -0500 From: "Stefano Previdi (sprevidi)" To: Eric C Rosen Thread-Topic: [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 Thread-Index: AQHRDQaNSu+O5jvuAkmSupOY8ZJPb56K0N6A Date: Tue, 3 Nov 2015 15:23:14 +0000 Message-ID: <7580D432-CB5A-4E9C-ABC4-0F9FDBC68505@cisco.com> References: <56294416.8030807@juniper.net> In-Reply-To: <56294416.8030807@juniper.net> 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: [10.61.78.21] Content-Type: text/plain; charset="utf-8" Content-ID: <1D4498BB9909BC4CBCB2668F049983EC@emea.cisco.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: idr wg , SPRING WG Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." 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bWFpbG1hbi9saXN0aW5mby9pZHINCg0K From nobody Wed Nov 4 17:46:51 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 821EA1B3645 for ; Wed, 4 Nov 2015 17:46:50 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.212 X-Spam-Level: X-Spam-Status: No, score=-4.212 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, 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 t2t0g9c0oTkv for ; Wed, 4 Nov 2015 17:46:49 -0800 (PST) Received: from puck.nether.net (puck.nether.net [204.42.254.5]) by ietfa.amsl.com (Postfix) with ESMTP id 519361B3631 for ; Wed, 4 Nov 2015 17:46:49 -0800 (PST) Received: by puck.nether.net (Postfix, from userid 507) id 0CD62540DC4; Wed, 4 Nov 2015 20:46:48 -0500 (EST) Date: Wed, 4 Nov 2015 20:46:48 -0500 From: Jon Mitchell To: Lizhenbin Message-ID: <20151105014648.GB25194@puck.nether.net> References: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA61266@nkgeml506-mbx.china.huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA61266@nkgeml506-mbx.china.huawei.com> User-Agent: Mutt/1.5.24 (2015-08-30) Archived-At: Cc: "spring@ietf.org" Subject: Re: [spring] Implementation Report on draft-ietf-spring-segment-routing-ldp-interop X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Nov 2015 01:46:50 -0000 On 03/11/15 01:21 +0000, Lizhenbin wrote: > Hi Folks, > > I proposed my concern on the implementation of interoperability between LDP and SR again in IETF. I also would like to remind you of my draft again: > > https://tools.ietf.org/html/draft-li-spring-compare-sr-ldp-rsvpte-00 > With the hopes of clarifying Lizhenbin's comments which I found a bit hard to follow both at the mic and in this email I went through this draft and found the most applicable section to be 4.2 (proxy egress) in the draft above versus Section 6 which he referenced. I believe this is the concern he is raising (Lizhenbin - please feel free to correct me). In inter-as option C and like technologies, there are two ways to distribute received label information from ASBR/PE to other PE's, either via BGP label-unicast or IGP (make other networks PE's look similar to this network's PE from label stack standpoint by redistribute prefixes into IGP and have PE advertise via LDP which results in a 2 label approach versus 3 label in BGP case). I'll refer to these as C1 (IGP) and C2 (BGP). draft-ietf-spring-segment-routing-ldp-interop-00 already does a good job of describing that option C/CsC/Seamless MPLS can be supported in it's Section 6 (using C2), but it could add a bit more text I think admitting that it can't support using a C1 model as many providers have deployed and therefore an extra label will be incurred. At least I can't think of an easy way to support having multiple ASBR's handle mapping these dynamically learned prefixes from the other AS to the same SID... -Jon From nobody Thu Nov 5 08:05:43 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 64C861A1ABF for ; Thu, 5 Nov 2015 08:05:42 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, UNPARSEABLE_RELAY=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 Af_9CprzWNdv for ; Thu, 5 Nov 2015 08:05:38 -0800 (PST) Received: from relais-inet.francetelecom.com (relais-ias244.francetelecom.com [80.12.204.244]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id F02221A1AB6 for ; Thu, 5 Nov 2015 08:05:37 -0800 (PST) Received: from omfeda08.si.francetelecom.fr (unknown [xx.xx.xx.201]) by omfeda13.si.francetelecom.fr (ESMTP service) with ESMTP id 725461902CE for ; Thu, 5 Nov 2015 17:05:36 +0100 (CET) Received: from Exchangemail-eme2.itn.ftgroup (unknown [10.114.31.17]) by omfeda08.si.francetelecom.fr (ESMTP service) with ESMTP id 58CAB384071 for ; Thu, 5 Nov 2015 17:05:33 +0100 (CET) Received: from OPEXCLILM21.corporate.adroot.infra.ftgroup ([fe80::e92a:c932:907e:8f06]) by OPEXCLILM24.corporate.adroot.infra.ftgroup ([fe80::a1e6:3e6a:1f68:5f7e%19]) with mapi id 14.03.0248.002; Thu, 5 Nov 2015 17:05:33 +0100 From: To: "spring@ietf.org" Thread-Topic: Minutes Thread-Index: AdEX40rQtk4jyuO+T8yR9qVu3jJg7g== Date: Thu, 5 Nov 2015 16:05:32 +0000 Message-ID: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.168.234.3] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-PMX-Version: 6.2.1.2478543, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2015.11.5.153615 Archived-At: Subject: [spring] Minutes X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 Nov 2015 16:05:42 -0000 Hi Folks, The minutes have been posted. Thanks to Jon Mitchell and Ignas Bagdonas for taking them. https://www.ietf.org/proceedings/94/minutes/minutes-94-spring Please review for any errors. Thanks, Bruno. ___________________________________________________________________________= ______________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confiden= tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu= ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el= ectroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou = falsifie. Merci. This message and its attachments may contain confidential or privileged inf= ormation that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and dele= te this message and its attachments. As emails may be altered, Orange is not liable for messages that have been = modified, changed or falsified. Thank you. From nobody Fri Nov 6 05:18:27 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id AE25D1A89F2; Fri, 6 Nov 2015 05:18:24 -0800 (PST) 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 cHlRa_fpnV-7; Fri, 6 Nov 2015 05:18:21 -0800 (PST) Received: from alln-iport-4.cisco.com (alln-iport-4.cisco.com [173.37.142.91]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 4FEF21A8A04; Fri, 6 Nov 2015 05:18:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=22705; q=dns/txt; s=iport; t=1446815901; x=1448025501; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=zaKZ5yGd7e0Jc5kJqopC4h69S1lxWPX8wDPhT8/0ln4=; b=gXoO7GKTVHb/3fEWZ8GOyxjUMHtmLdMOD9CkBGpQybBGu13MVmBH5nDn /W4yhqFgicPbxFTyU++uerCvfGQyTYcdY3KWSbu//j+Wt+y3UspPsEtKb LCMy3ZnzYIBPmpckzlX7vwKJQFIObh0Cx5bUIGjSTDeE+jDJwUwF0jyZj A=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D+AQBwpzxW/5BdJa1egztTbwa+IAENgWAXAQmFbwKBOTgUAQEBAQEBAYEKhDYBAQQBAQFrCxACAQg/BycLFBECBA4FiC4NwUIBAQEBAQEBAQEBAQEBAQEBAQEBAQEUBIZUghCCbogkgRUFh0SLI4NhAYgMhRiBW5IWiFIBHwEBQoIRHYFWcoQNgQcBAQE X-IronPort-AV: E=Sophos;i="5.20,252,1444694400"; d="scan'208,217";a="205027930" Received: from rcdn-core-8.cisco.com ([173.37.93.144]) by alln-iport-4.cisco.com with ESMTP; 06 Nov 2015 13:18:20 +0000 Received: from XCH-RTP-010.cisco.com (xch-rtp-010.cisco.com [64.101.220.150]) by rcdn-core-8.cisco.com (8.14.5/8.14.5) with ESMTP id tA6DIJ2l023919 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Fri, 6 Nov 2015 13:18:20 GMT Received: from xch-rtp-010.cisco.com (64.101.220.150) by XCH-RTP-010.cisco.com (64.101.220.150) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Fri, 6 Nov 2015 08:18:19 -0500 Received: from xch-rtp-010.cisco.com ([64.101.220.150]) by XCH-RTP-010.cisco.com ([64.101.220.150]) with mapi id 15.00.1104.000; Fri, 6 Nov 2015 08:18:19 -0500 From: "Stefano Previdi (sprevidi)" To: Eric C Rosen Thread-Topic: [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 Thread-Index: AQHRDQaNSu+O5jvuAkmSupOY8ZJPb56PZPUA Date: Fri, 6 Nov 2015 13:18:19 +0000 Message-ID: <5104A350-EA8D-4824-A396-1DC46140BA5D@cisco.com> References: <56294416.8030807@juniper.net> In-Reply-To: <56294416.8030807@juniper.net> 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: [10.61.161.25] Content-Type: multipart/alternative; boundary="_000_5104A350EA8D4824A3961DC46140BA5Dciscocom_" MIME-Version: 1.0 Archived-At: Cc: idr wg , SPRING WG Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Nov 2015 13:18:24 -0000 --_000_5104A350EA8D4824A3961DC46140BA5Dciscocom_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Eric, the proposed text looks good but with one question below. On Oct 22, 2015, at 10:16 PM, Eric C Rosen > wrote: I'd like to make some suggestions for textual changes to sections 3.1 and 4.3 of draft-ietf-idr-prefix-sid. The main purpose of these suggestions is to clarify the use of the Originator SRGB TLV, and to remove what I think is an excessive and distracting amount of repetition about the inadvisability of allowing different nodes to use different SRGBs. My proposal for the text of these sections follows. In addition to the changes I mentioned above, some typos in the original text are fixed, and there is a suggestion (explained below in brackets) for slightly modifying the text about the AFI/SAFIs with which the Prefix-SID attribute may be used. A few other explanations can be found in brackets below inside the proposed text. -------------------- 3.1. MPLS Prefix Segment In this document, we specify "MPLS Prefix Segments" only for BGP routes that have an AFI/SAFI of 1/4 or 2/4. The applicability of MPLS prefix segments to other AFI/SAFIs is outside the scope of this document. [The original text said "A Multiprotocol BGP labeled IPv4/IPv6 Unicast ([RFC3107]) session type is required", I don't think that is quite precise. If a session has multiple AFI/SAFIs, including 1/4, I don't think we want t= o say that the attribute can be placed in any UPDATE on that session. Also, it's not quite accurate to say that RFC3107 is restricted to 1/4 and 2/4; RFC3107 doesn't mention the AFI. And we may want to leave it open that the Prefix Segment notion may eventually be applied somehow to SAFI-128 routes.= ] The BGP Prefix Segment is realized on the MPLS dataplane in the following way: As described in [I-D.ietf-spring-segment-routing-msdc] the operator assigns a globally unique "index", L_I, to a locally sourced prefix of a BGP speaker N which is advertised to all other BGP speakers in the SR domain. According to [I-D.ietf-spring-segment-routing], each BGP speaker is configured with a label block called the Segment Routing Global Block (SRGB). (While it is recommended to use the same SRGB across all the nodes within the SR domain, the SRGB of a node is a local property and could be different on different speakers). The index L_I is a 32 bit offset in the SRGB. Each BGP speaker derives its local MPLS label, L, by adding L_I to the start value of its own SRGB, and programs L in its MPLS dataplane as its incoming/local label for the prefix. (See section 5.1 for more details.) [Added reference to section 5.1.] The outgoing label for the prefix is found in the NLRI of the Multiprotocol BGP labeled IPv4/IPv6 Unicast prefix advertisement. The index L_I is only used as a hint to derive the local/incoming label. Section 4.1 of this document specifies the Label-Index TLV of the BGP Prefix-SID attribute; this TLV can be used to advertise the label index of a given prefix. If the BGP speakers are not all configured with the same SRGB, and if traffic-engineering within the SR domain is required, each node may be required to advertise its local SRGB. One way of advertising the local SRGB is to use the segment routing extensions of BGP-LS (draft-gredler-idr-bgp-ls-segment-routing-ext-00.txt). An alternative option is to use the Originator SRGB TLV of the prefix-SID attribute, as specified in Section 4.3 of this document. [Rearranged last paragraphs slightly to improve flow, imo.] 4.3. Originator SRGB TLV The Originator SRGB TLV is an optional TLV and has the following format: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | Flags | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Flags | +-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | SRGB 1 (6 octets) | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | SRGB n (6 octets) | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ [I can rarely get the ascii art to render correctly, but the diagram above is supposed to be unchanged from what appears in the draft.] where: o Type is 3. o Length is the total length of the value portion of the TLV: 2 + multiple of 6. o Flags: 16 bits of flags. None are defined in this document. Flags SHOULD be clear on transmission and MUST be ignored at reception. o SRGB: 3 octets of base followed by 3 octets of range. Note that the SRGB field MAY appear multiple times. If the SRGB field appears multiple times, the SRGB consists of multiple ranges. The meaning of an SRGB with multiple ranges is explained in Section 3.2 ("SID/Label Range TLV") of [I-D.ietf-ospf-segment-routing-extensions]. [Added some text about the semantics of the SRGB field appearing multiple times, with reference to a document that actually explains it.] When a BGP speaker attaches a Prefix-SID attribute to a given route, the Originator SRGB TLV MUST NOT be included in the attribute unless the following conditions hold: - The prefix field of the route's NLRI contains a host address (i.e., a /32 IPv4 address or a /128 IPv6 address). - The value of the Originator SRGB TLV specifies the SRGB of the node that is identified by the prefix field of the NLRI. why would you need such limitation ? A prefix may have a shorter mask than = 32 (or 128) and still be ok for the Originator SRGB to be there. The Originator-SRGB may only be inserted by the originator of the prefix, m= aybe we should emphasize that, but the masklength is mostly irrelevant here= . s. [This paragraph and bullet items are added in order to make clear just what the semantics of the TLV are.] If a BGP route is received that contains a Prefix-SID attribute with an Originator SRGB TLV, but the prefix field of the NLRI does not contain a host address, the attribute SHOULD be regarded as malformed. If a Prefix-SID attribute contains more than one SRGB TLV, it SHOULD be regarded as malformed. See section 7 for the treatment of a malformed Prefix-SID attribute. When a route carrying the Prefix-SID attribute is propagated, the Originator SRGB TLV (if present) MUST NOT be changed. ----------------- _______________________________________________ Idr mailing list Idr@ietf.org https://www.ietf.org/mailman/listinfo/idr --_000_5104A350EA8D4824A3961DC46140BA5Dciscocom_ Content-Type: text/html; charset="us-ascii" Content-ID: Content-Transfer-Encoding: quoted-printable Hi Eric,

the proposed text looks g= ood but with one question below.


On Oct 22, 2015, at 10:16 PM, Eric C R= osen <erosen@juniper.ne= t> wrote:

I'd like to make some suggestions for textual changes to sections 3.1 = and 
4.3 of draft-ietf-idr-prefix-sid.  The main purpose of these sugg= estions is 
to clarify the use of the Originator SRGB TLV, and to remove what I&nb= sp;
think is an excessive and distracting amount of repetition about the&n= bsp;
inadvisability of allowing different nodes to use different SRGBs. 
My proposal for the text of these sections follows.  In addition = to the 
changes I mentioned above, some typos in the original text are fixed, = and 
there is a suggestion (explained below in brackets) for slightly modif= ying 
the text about the AFI/SAFIs with which the Prefix-SID attribute may b= e 
used.  A few other explanations can be found in brackets below in= side the 
proposed text. 

-------------------- 

3.1.  MPLS Prefix Segment 

   In this document, we specify "MPLS Prefix Segments" = only for BGP routes 
   that have an AFI/SAFI of 1/4 or 2/4.  The applicability o= f MPLS prefix 
   segments to other AFI/SAFIs is outside the scope of this = document. 

[The original text said "A Multiprotocol BGP labeled IPv4/IPv6 Un= icast 
([RFC3107]) session type is required", I don't think that is quite&nbs= p;precise. 
If a session has multiple AFI/SAFIs, including 1/4, I don't think we w= ant to 
say that the attribute can be placed in any UPDATE on that session. &n= bsp;Also, 
it's not quite accurate to say that RFC3107 is restricted to 1/4 and 2= /4; 
RFC3107 doesn't mention the AFI.  And we may want to leave it open&nbs= p;that the 
Prefix Segment notion may eventually be applied somehow to SAFI-128 ro= utes.] 

   The BGP Prefix Segment is realized on the MPLS dataplane in th= e 
   following way: 

      As described in [I-D.ietf-spring-segment-routing-msdc]= the 
      operator assigns a globally unique "index", = L_I, to a locally 
      sourced prefix of a BGP speaker N which is advertised = to all other 
      BGP speakers in the SR domain. 

      According to [I-D.ietf-spring-segment-routing], each B= GP speaker 
      is configured with a label block called the Segment Ro= uting Global 
      Block (SRGB).  (While it is recommended to use th= e same SRGB across 
      all the nodes within the SR domain, the SRGB of a node= is a local 
      property and could be different on different speakers)= . 

      The index L_I is a 32 bit offset in the SRGB.  Ea= ch BGP speaker 
      derives its local MPLS label, L, by adding L_I to the = start value 
      of its own SRGB, and programs L in its MPLS dataplane = as its 
      incoming/local label for the prefix.  (See sectio= n 5.1 for more 
      details.) 

[Added reference to section 5.1.] 

      The outgoing label for the prefix is found in the NLRI= of the 
      Multiprotocol BGP labeled IPv4/IPv6 Unicast prefix&nbs= p;advertisement. 
      The index L_I is only used as a hint to derive the&nbs= p;local/incoming 
      label. 

   Section 4.1 of this document specifies the Label-Index TLV of&= nbsp;the BGP 
   Prefix-SID attribute; this TLV can be used to advertise the&nb= sp;label index 
   of a given prefix. 

   If the BGP speakers are not all configured with the same SRGB,=  and if 
   traffic-engineering within the SR domain is required, each nod= e may be 
   required to advertise its local SRGB.  One way of adverti= sing the local 
   SRGB is to use the segment routing extensions of BGP-LS <= br class=3D"">    (draft-gredler-idr-bgp-ls-segment-routing-ext-00.txt). An = ;alternative 
   option is to use the Originator SRGB TLV of the prefix-SID&nbs= p;attribute, as 
   specified in Section 4.3 of this document. 

[Rearranged last paragraphs slightly to improve flow, imo.] 



4.3.  Originator SRGB TLV 

   The Originator SRGB TLV is an optional TLV and has the fo= llowing 
   format: 

     0               &nbs= p;   1 2                  = ; 3 
     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7= 8 9 0 1 
    +-+-+-+-+-+-+-+-+-+-&= #43;-+-+-+-+-+-+-+-+-+-+-+-+= ;-+-+-+-+-+-+-+-+-+-+ 
    |     Type      |     &nbs= p;    Length               | &= nbsp;  Flags      | 
    +-+-+-+-+-+-+-+-+-+-&= #43;-+-+-+-+-+-+-+-+-+-+-+-+= ;-+-+-+-+-+-+-+-+-+-+ 
    |     Flags     | 
    +-+-+-+-+-+-+-+-+ 
    +-+-+-+-+-+-+-+-+-+-&= #43;-+-+-+-+-+-+-+-+-+-+-+-+= ;-+-+-+-+-+-+-+-+-+-+ 
    |         SRGB 1 (6 octets)   &= nbsp;                    =             | 
    |                 &nb= sp;             +-+-+-+-+= -+-+-+-+-+-+-+-+-+-+-+-+&nb= sp;
    |                 &nb= sp;             | 
    +-+-+-+-+-+-+-+-+-+-&= #43;-+-+-+-+-+-+ 

    +-+-+-+-+-+-+-+-+-+-&= #43;-+-+-+-+-+-+-+-+-+-+-+-+= ;-+-+-+-+-+-+-+-+-+-+ 
    |         SRGB n (6 octets)   &= nbsp;                    =             | 
    |                 &nb= sp;             +-+-+-+-+= -+-+-+-+-+-+-+-+-+-+-+-+&nb= sp;
    |                 &nb= sp;             | 
    +-+-+-+-+-+-+-+-+-+-&= #43;-+-+-+-+-+-+ 

[I can rarely get the ascii art to render correctly, but the diagram a= bove 
is supposed to be unchanged from what appears in the draft.] 

   where: 

   o  Type is 3. 

   o  Length is the total length of the value portion of the= TLV: 2 + 
      multiple of 6. 

   o  Flags: 16 bits of flags.  None are defined in thi= s document. 
      Flags SHOULD be clear on transmission and MUST be igno= red at 
      reception. 

   o  SRGB: 3 octets of base followed by 3 octets of range. =  Note that the 
      SRGB field MAY appear multiple times.  If the SRG= B field appears 
      multiple times, the SRGB consists of multiple ranges. =  The meaning of 
      an SRGB with multiple ranges is explained in Section 3= .2 ("SID/Label 
      Range TLV") of [I-D.ietf-ospf-segment-routing-ext= ensions]. 

[Added some text about the semantics of the SRGB field appearing multi= ple 
times, with reference to a document that actually explains it.] 

   When a BGP speaker attaches a Prefix-SID attribute to a given&= nbsp;route, the 
   Originator SRGB TLV MUST NOT be included in the attribute = ;unless the 
   following conditions hold: 

   - The prefix field of the route's NLRI contains a host address=  (i.e., a 
     /32 IPv4 address or a /128 IPv6 address). 

   - The value of the Originator SRGB TLV specifies the SRGB of&n= bsp;the node 
     that is identified by the prefix field of the NLRI.&nbs= p;




why would you need such limitation ? A prefix may have a shorter mask than = 32 (or 128) and still be ok for the Originator SRGB to be there.

The Originator-SRGB may o= nly be inserted by the originator of the prefix, maybe we should emphasize = that, but the masklength is mostly irrelevant here.

s.




[This paragraph and bullet items are added in order to make clear just= what 
the semantics of the TLV are.] 

   If a BGP route is received that contains a Prefix-SID attribut= e with an 
   Originator SRGB TLV, but the prefix field of the NLRI does not=  contain a 
   host address, the attribute SHOULD be regarded as malformed. I= f a 
   Prefix-SID attribute contains more than one SRGB TLV, it SHOUL= D be 
   regarded as malformed.  See section 7 for the treatment o= f a malformed 
   Prefix-SID attribute. 

   When a route carrying the Prefix-SID attribute is propagated,&= nbsp;the 
   Originator SRGB TLV (if present) MUST NOT be changed. 
----------------- 



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--_000_5104A350EA8D4824A3961DC46140BA5Dciscocom_-- From nobody Fri Nov 6 12:26:45 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 42D1F1B301B for ; Fri, 6 Nov 2015 12:26:44 -0800 (PST) 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 UrVe-hMLe4OX for ; Fri, 6 Nov 2015 12:26:42 -0800 (PST) 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 86A6A1B301D for ; Fri, 6 Nov 2015 12:26:42 -0800 (PST) X-AuditID: c618062d-f79ef6d000007f54-da-563cab919853 Received: from EUSAAHC008.ericsson.se (Unknown_Domain [147.117.188.96]) by usevmg20.ericsson.net (Symantec Mail Security) with SMTP id E2.9A.32596.19BAC365; Fri, 6 Nov 2015 14:30:58 +0100 (CET) Received: from EUSAAMB105.ericsson.se ([147.117.188.122]) by EUSAAHC008.ericsson.se ([147.117.188.96]) with mapi id 14.03.0248.002; Fri, 6 Nov 2015 15:26:40 -0500 From: Uma Chunduri To: Jon Mitchell , Lizhenbin Thread-Topic: [spring] Implementation Report on draft-ietf-spring-segment-routing-ldp-interop Thread-Index: AQHRF2vbJmtAt+Wgd028ui6Kz7sDUJ6PcBJA Date: Fri, 6 Nov 2015 20:26:40 +0000 Message-ID: <1B502206DFA0C544B7A6046915200863513DC892@eusaamb105.ericsson.se> References: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA61266@nkgeml506-mbx.china.huawei.com> <20151105014648.GB25194@puck.nether.net> In-Reply-To: <20151105014648.GB25194@puck.nether.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [147.117.188.10] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFmplkeLIzCtJLcpLzFFi42KZXLonQXfSapswg+k7+Sy2TtrKarG78Q+7 xfELvxkdmD1ajrxl9Viy5CeTR2/TNMYA5igum5TUnMyy1CJ9uwSujI4dK9kK5ohUzNk7m7WB cbZAFyMHh4SAicSFk5ldjJxAppjEhXvr2boYuTiEBI4wSrz/NQnKWcYo8anrKRNIFZuAnsTH qT/ZQWwRAV+JyefWgMWZBdQllu2/wAJiCwvESZy8No0NoiZe4vK+J6wQtpHEu9tNzCA2i4CK xJqXX1hAjuAFmrP9gTbErgZGia8fNoPN5xQwlbj7cjHYTEag676fgtklLnHryXwmiKsFJJbs Oc8MYYtKvHz8jxXCVpKYtPQcK0S9jsSC3Z/YIGxtiWULX4PV8woISpyc+YRlAqPYLCRjZyFp mYWkZRaSlgWMLKsYOUqLU8ty040MNjECI+eYBJvuDsY9Ly0PMQpwMCrx8H7Isw4TYk0sK67M PcQowcGsJMLr9cMmTIg3JbGyKrUoP76oNCe1+BCjNAeLkjjv/iX3Q4UE0hNLUrNTUwtSi2Cy TBycUg2MtbOVtF6unOjr2mTtuMt6xvU7mj8PcBa7b55qGMff4iunsWj3xz9cLNvfsmy+y6lm JdvvaZbYcvnXhakK3yU+THdVFDZZa/te9abzJjmR/KXdH7/cy+hbF1LdzrOT2ein+5o19ZPn conwOwQUu9rvuvpROGfzgo1vn53O2eRfXRZ26kTp/NkBSizFGYmGWsxFxYkAjwnMPJgCAAA= Archived-At: Cc: "spring@ietf.org" Subject: Re: [spring] Implementation Report on draft-ietf-spring-segment-routing-ldp-interop X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Nov 2015 20:26:44 -0000 In-line [Uma]: -- Uma C. -----Original Message----- From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Jon Mitchell Sent: Wednesday, November 04, 2015 5:47 PM To: Lizhenbin Cc: spring@ietf.org Subject: Re: [spring] Implementation Report on draft-ietf-spring-segment-ro= uting-ldp-interop On 03/11/15 01:21 +0000, Lizhenbin wrote: > Hi Folks, >=20 > I proposed my concern on the implementation of interoperability between L= DP and SR again in IETF. I also would like to remind you of my draft again: >=20 > https://tools.ietf.org/html/draft-li-spring-compare-sr-ldp-rsvpte-00 >=20 With the hopes of clarifying Lizhenbin's comments which I found a bit hard = to follow both at the mic and in this email I went through this draft and f= ound the most applicable section to be 4.2 (proxy egress) in the draft abov= e versus Section 6 which he referenced. I believe this is the concern he i= s raising (Lizhenbin - please feel free to correct me). In inter-as option C and like technologies, there are two ways to distribut= e received label information from ASBR/PE to other PE's, either via BGP lab= el-unicast or IGP (make other networks PE's look similar to this network's = PE from label stack standpoint by redistribute prefixes into IGP and have P= E advertise via LDP which results in a 2 label approach versus 3 label in B= GP case). I'll refer to these as C1 (IGP) and C2 (BGP). draft-ietf-spring-segment-routing-ldp-interop-00 already does a good job of= describing that option C/CsC/Seamless MPLS can be supported in it's Sectio= n 6 (using C2), but it could add a bit more text I think admitting that it = can't support using a C1 model as many providers have deployed and therefor= e an extra label will be incurred. At least I can't think of an easy way t= o support having multiple ASBR's handle mapping these dynamically learned p= refixes from the other AS to the same SID... [Uma]: "easy way" - fair description. Two not so easy ways for Option C- 2 labels with SR: 1. Make sure all your ASBRs have same SRGB provisioned and make sure sam= e global index is assigned for redistributed PE prefixes from other AS - Only way is to use same vendor nodes( if possible) 2. Use context labels/recursive label lookups using anycast segments - All vendors may not support and support is limited to few platforms = even with the same vendor Apart from the above Section 6 of this draft alludes to few practical issue= s with LFA/RLFA when LDP-SR interworking in place.. -- Uma C. =09 From nobody Fri Nov 6 12:26:57 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 749E51B301B for ; Fri, 6 Nov 2015 12:26:55 -0800 (PST) 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 ytDxGiGYI7yF for ; Fri, 6 Nov 2015 12:26:53 -0800 (PST) Received: from usevmg21.ericsson.net (usevmg21.ericsson.net [198.24.6.65]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 06E361B301D for ; Fri, 6 Nov 2015 12:26:52 -0800 (PST) X-AuditID: c6180641-f792c6d00000686a-36-563c9f7e7507 Received: from EUSAAHC001.ericsson.se (Unknown_Domain [147.117.188.75]) by usevmg21.ericsson.net (Symantec Mail Security) with SMTP id 1E.39.26730.E7F9C365; Fri, 6 Nov 2015 13:39:26 +0100 (CET) Received: from EUSAAMB105.ericsson.se ([147.117.188.122]) by EUSAAHC001.ericsson.se ([147.117.188.75]) with mapi id 14.03.0248.002; Fri, 6 Nov 2015 15:26:46 -0500 From: Uma Chunduri To: "bruno.decraene@orange.com" , "spring@ietf.org" Thread-Topic: Minutes Thread-Index: AdEX40rQtk4jyuO+T8yR9qVu3jJg7gA68b7Q Date: Fri, 6 Nov 2015 20:26:45 +0000 Message-ID: <1B502206DFA0C544B7A6046915200863513DC899@eusaamb105.ericsson.se> References: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> In-Reply-To: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [147.117.188.10] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrPLMWRmVeSWpSXmKPExsUyuXSPt27dfJswg/47IhY/dsxhtjh+4Tej A5PHkiU/mTxanp1kC2CK4rJJSc3JLEst0rdL4MqYdn4eU0EXb8WU9z3sDYx/uboYOTgkBEwk /s9y6mLkBDLFJC7cW8/WxcjFISRwhFHiRk8HO0hCSGAZo8TUBh4Qm01AT+Lj1J9gcRGBJInW CRuZQGxhARGJ/sfnmCDiohLzD++CqjGSmN7WAhZnEVCRmPBqGSvIXl4BX4mmZWEQuzoYJd58 nwa2mFOgk1Hi8kOQKzg5GIEu+n5qDVgzs4C4xK0n85kgLhWQWLLnPDOELSrx8vE/VghbSWLS 0nOsEPU6Egt2f2KDsLUlli18DVbPKyAocXLmE5YJjKKzkIydhaRlFpKWWUhaFjCyrGLkKC1O LctNNzLcxAiMhmMSbI47GBd8sjzEKMDBqMTD+yHPOkyINbGsuDL3EKMEB7OSCK/XD5swId6U xMqq1KL8+KLSnNTiQ4zSHCxK4rzzZtwPFRJITyxJzU5NLUgtgskycXBKNTDKn3LcnZu8QP7x hk0Jr8xyy+aEVzBGa2vMPfWhZ/N69lcz+Yp/ly3mOXuxx+tVndTBmJK8szKm565OSlVh2u5x fuKeySGf5Nw3LfOyePci0l27/OQdifiPG9vNhZc4vbg6x91/qYdew5Xg5w1bp03Yb83s9+dh 8oP6bTkrapY/im0XECstmrVZiaU4I9FQi7moOBEAeGSVioICAAA= Archived-At: Subject: Re: [spring] Minutes X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 06 Nov 2015 20:26:55 -0000 Good to the minutes posted quickly. Thanks for the details.. -- Uma C. -----Original Message----- From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o= range.com Sent: Thursday, November 05, 2015 8:06 AM To: spring@ietf.org Subject: [spring] Minutes Hi Folks, The minutes have been posted. Thanks to Jon Mitchell and Ignas Bagdonas for taking them. https://www.ietf.org/proceedings/94/minutes/minutes-94-spring Please review for any errors. Thanks, Bruno. ___________________________________________________________________________= ______________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confiden= tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou = copies sans autorisation. Si vous avez recu ce message par erreur, veuillez= le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Le= s messages electroniques etant susceptibles d'alteration, Orange decline to= ute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. This message and its attachments may contain confidential or privileged inf= ormation that may be protected by law; they should not be distributed, used= or copied without authorisation. If you have received this email in error, please notify the sender and dele= te this message and its attachments. As emails may be altered, Orange is not liable for messages that have been = modified, changed or falsified. Thank you. _______________________________________________ spring mailing list spring@ietf.org https://www.ietf.org/mailman/listinfo/spring From nobody Mon Nov 9 01:12:06 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 92E8F1B7AC8 for ; Mon, 9 Nov 2015 01:12:04 -0800 (PST) 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 3AkzO1ED-dYe for ; Mon, 9 Nov 2015 01:12:02 -0800 (PST) Received: from rcdn-iport-5.cisco.com (rcdn-iport-5.cisco.com [173.37.86.76]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 229751B7AC5 for ; Mon, 9 Nov 2015 01:12:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=8346; q=dns/txt; s=iport; t=1447060322; x=1448269922; h=from:to:subject:date:message-id:references:in-reply-to: content-transfer-encoding:mime-version; bh=9BF0HQF9J6yUNHG0GXiAU5nfRj2tvTn9/CyQe1eV2fU=; b=ZQV0xo4tyoGloKv7GVehCAbPoi4tR0NpLFPc7GFZJ5ZPZuT3tpo8GvIm kHoQjuWZFyzzVwcXTDU9N8dUKjkM8nSH6VVEr0ZPa2ePVDSCnqwt6fmJA fU/P1hdNJMhcWEk6hHEUOFK2gZc05Hec3SrNB6wifgrEiNYdeUvtn3iLZ 4=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D4AQBCYkBW/49dJa1egztTbwa+MwENgWEXCoUlSgKBMTgUAQEBAQEBAYEKhDUBAQEEAQEBNzQJDgQCAQgOAwEDAQEfCQcnCxQDBggCBAESCAyIGg2/OQEBAQEBAQEBAQEBAQEBAQEBAQEBARiGVIR+iTkFjRuJLQGFHYJwhRKBYkmDd5I4g3EBHwEBQoIRHRaBQHKEX4EHAQEB X-IronPort-AV: E=Sophos;i="5.20,265,1444694400"; d="scan'208";a="45154637" Received: from rcdn-core-7.cisco.com ([173.37.93.143]) by rcdn-iport-5.cisco.com with ESMTP; 09 Nov 2015 09:11:45 +0000 Received: from XCH-RCD-004.cisco.com (xch-rcd-004.cisco.com [173.37.102.14]) by rcdn-core-7.cisco.com (8.14.5/8.14.5) with ESMTP id tA99BjxF012707 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Mon, 9 Nov 2015 09:11:45 GMT Received: from xch-aln-001.cisco.com (173.36.7.11) by XCH-RCD-004.cisco.com (173.37.102.14) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Mon, 9 Nov 2015 03:11:44 -0600 Received: from xch-aln-001.cisco.com ([173.36.7.11]) by XCH-ALN-001.cisco.com ([173.36.7.11]) with mapi id 15.00.1104.000; Mon, 9 Nov 2015 03:11:44 -0600 From: "Les Ginsberg (ginsberg)" To: Chris Bowers , "spring@ietf.org" Thread-Topic: New Version Notification for draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt Thread-Index: AQHQ/6CxHQ8/5U5LHEGhv25qi8GIjJ5dQkDggCwZhxA= Date: Mon, 9 Nov 2015 09:11:44 +0000 Message-ID: References: <20151005190437.7637.79353.idtracker@ietfa.amsl.com> 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: [10.24.9.167] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [spring] New Version Notification for draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Nov 2015 09:12:04 -0000 Chris - I have a number of questions - but in order to properly frame them I need t= o recount some history - please bear with me. In the very early days of SR there was a proposal to reserve a fixed label = range on all routers (16000 - 23999) for the use of SR. This seemed workabl= e but there was concern that the same range would not be available on all r= outers so the SR community agreed that we needed to allow the advertisement= of a different SRGB range on each SR capable router. Then, another concern was raised that a single contiguous range large enoug= h to meet the SR requirements might not be available on all routers and the= refore we needed to support the advertisement of multiple SRGB ranges from = a given node. This capability has been added - though it has also raised ot= her concerns regarding how many ranges might be enough and how to deal with= inconsistencies (overlaps) in the advertised ranges should some error occu= r. Now, in support of multiple algorithms/topologies, this draft proposes that= algorithm/topology specific SRGBs be advertised - and that to fully get th= e benefits of consistent SID assignment for the same prefix across algorith= ms/topologies (the major goal of this draft) that all routers be able to su= pport identical ranges for each algorithm/topology. (Section 5 goes into th= is in detail) - and to be able to allocate new ranges for newly configured = algorithms/topologies on demand. Section 6 goes on to suggest that it woul= d be a wonderful goal if all routers could assign the same base label/range= to each algorithm/topology so that the labels could be derived algorithmic= ally (though you admit this may not always be possible). My first question is how do you reconcile this requirement for consistency = on all nodes with the earlier decisions to support inconsistency as regards= SRGB base values/range sizes? My second question is associated with the assumption of a single "node_inde= x" per node. I for one would be delighted if we could get agreement on usin= g a single host address/node (or at least one per AF) for all traffic to th= at node. But this does not meet the deployment requirements in all cases an= d so we support multiple "node_indeces" for a given node. This means that w= e do not map SIDs to nodes - we map SIDs to prefixes. So it is conceptually= more straightforward and less problematic to configure SIDs for prefix ran= ges. This is in fact how SRMS advertisements are constructed i.e. (Prefix/Prefix length, Starting SID, Range) How would you propose to incorporate this style of SID assignment into your= algorithms? Do you assume a maximum number of node-sids required for every= node in the network and require the range for each algorithm/topology be s= ized large enough for the worst case? This seems potentially wasteful - esp= ecially if a deployment chooses to use a particular address for a topology = as a traffic differentiator. =20 My third question relates to the algorithm/topology independence of the SID= assignment that you propose. Throughout the document you assume that you h= ave a single SID for a given prefix and you simply add the appropriate algo= rithm/topology specific SRGB base value to this SID to derive the forwardin= g label. However, current protocol advertisements for SIDs include both alg= orithm and topology as context for the SID. This reflects the current SR ar= chitecture which has been defined with algorithm/topology as an explicit co= ntext for a SID. Your proposal fundamentally changes this and therefore all= existing encodings of SID advertisements (prefix reachability, SRGB, SRMS = advertisements) would have to be changed in a non-backwards compatible way = in order to support your proposal. Other than definition of a new SRGB adv= ertisement, you do not discuss this in the draft. How do you intend to addr= ess this major issue? Les > -----Original Message----- > From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Chris Bowers > Sent: Monday, October 05, 2015 12:31 PM > To: spring@ietf.org > Subject: [spring] FW: New Version Notification for draft-bowers-spring-ad= v- > per-algorithm-label-blocks-02.txt >=20 > SPRING WG, >=20 > There was quite a lot of discussion in person after we presented draft- > bowers-spring-adv-per-algorithm-label-blocks-01 in Prague, and there was > also much discussion on this list about the issue raised by this draft. = We have > made two main additions to this revision of the draft to further this > discussion. >=20 > 1) We have included discussion of multiple topologies in addition to mult= iple > algorithms, and we have modified the proposed ISIS extension to handle > both multiple topologies and multiple algorithms. >=20 > 2) We have tried to accurately describe a proposal, which was outlined on > this list, for managing the assignment of per-topology/per-algorithm node > index values, which we refer to as the "configured offset mapping method"= . >=20 > We welcome feedback from the working group on this draft. >=20 > Thanks, > Chris >=20 > -----Original Message----- > From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] > Sent: Monday, October 05, 2015 2:05 PM > To: Uma Chunduri ; Hannes Gredler > ; Pushpasis Sarkar ; Chris > Bowers ; Chris Bowers ; > Uma Chunduri ; Pushpasis Sarkar > ; Hannes Gredler > Subject: New Version Notification for draft-bowers-spring-adv-per- > algorithm-label-blocks-02.txt >=20 >=20 > A new version of I-D, draft-bowers-spring-adv-per-algorithm-label-blocks- > 02.txt > has been successfully submitted by Chris Bowers and posted to the IETF > repository. >=20 > Name: draft-bowers-spring-adv-per-algorithm-label-blocks > Revision: 02 > Title: Advertising Per-Topology and Per-Algorithm Label Blocks > Document date: 2015-10-05 > Group: Individual Submission > Pages: 14 > URL: https://www.ietf.org/internet-drafts/draft-bowers-spring-= adv- > per-algorithm-label-blocks-02.txt > Status: https://datatracker.ietf.org/doc/draft-bowers-spring-adv-= per- > algorithm-label-blocks/ > Htmlized: https://tools.ietf.org/html/draft-bowers-spring-adv-per- > algorithm-label-blocks-02 > Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-bowers-spring-a= dv-per- > algorithm-label-blocks-02 >=20 > Abstract: > When segment routing is used in a network that is controlled by a > link state IGP (such as ISIS or OSPF), each node in the network can > be assigned one or more index numbers, known as "node-SIDs". The > node-SIDs are unique within the network, and are known to all the > nodes in the network. If an ingress node has a data packet to be > sent to an egress node, the ingress node may select a node-SID > corresponding to the egress node, and "translate" that node-SID to an > MPLS label. The MPLS label represents a particular path to the > egress node; the path is determined by applying a routing algorithm > to a particular view of the network topology and a particular set of > metric assignments to the links of that topology. The packet can > then be forwarded by pushing the label on the packet's label stack > and transmitting the packet to the next hop on the corresponding path > to the egress node. This document compares two different procedures > for translating a node-SID to the MPLS label that represents a path > chosen by a particular algorithm operating on a particular topology. > It also specifies the ISIS extensions needed to support one of the > procedures (known as the "per-topology/per-algorithm label block" > procedure). >=20 >=20 >=20 >=20 > Please note that it may take a couple of minutes from the time of submiss= ion > until the htmlized version and diff are available at tools.ietf.org. >=20 > The IETF Secretariat >=20 > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring From nobody Mon Nov 9 01:55:01 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id E3F871B7B93 for ; Mon, 9 Nov 2015 01:54:59 -0800 (PST) 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 ZY09j49tk1xT for ; Mon, 9 Nov 2015 01:54:58 -0800 (PST) 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 24DA91B7B92 for ; Mon, 9 Nov 2015 01:54:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=1906; q=dns/txt; s=iport; t=1447062899; x=1448272499; h=from:to:subject:date:message-id:references:in-reply-to: content-transfer-encoding:mime-version; bh=UXrEzf/KAEUc0Xp/OZdBwXCFcqtajXxYyC5w4d5FhfA=; b=bUxGs00ztn13S6vLgjHinmSCfOhExJdc8eEJYNhfOAYgnriZl4aCX11y h5mOBNInNdvngUWbOeAeh5uTOR3X8Qbn/UAlvJNgkwBT8X0N2JoYz8bH6 j0lu1RN+iXMNnAw6dJi8z2gShj5sge5toG4qq9wyWGqrol/Kuh+RvV4T2 4=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0D3AQDJbEBW/5pdJa1egztTbwa+MwENgWEXDoUhSgKBMTgUAQEBAQEBAYEKhDUBAQECAgEBATc0FwQCAQgRBAEBHwkHJwsUCQgBAQQBEgiIJg2/OAEBAQEBAQEBAQEBAQEBAQEBAQEBARiLUoQqEQGEfQWSZ4NhAY0fgWKEQIc1gVmNGwEfAQFChARyAYQkOoEHAQEB X-IronPort-AV: E=Sophos;i="5.20,265,1444694400"; d="scan'208";a="48862786" Received: from rcdn-core-3.cisco.com ([173.37.93.154]) by rcdn-iport-1.cisco.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 09 Nov 2015 09:54:58 +0000 Received: from XCH-ALN-007.cisco.com (xch-aln-007.cisco.com [173.36.7.17]) by rcdn-core-3.cisco.com (8.14.5/8.14.5) with ESMTP id tA99svLc007426 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Mon, 9 Nov 2015 09:54:57 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; Mon, 9 Nov 2015 03:54:56 -0600 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; Mon, 9 Nov 2015 03:54:56 -0600 From: "Roberta Maglione (robmgl)" To: "bruno.decraene@orange.com" , "spring@ietf.org" Thread-Topic: Minutes Thread-Index: AdEX40rQtk4jyuO+T8yR9qVu3jJg7gC8PCVg Date: Mon, 9 Nov 2015 09:54:56 +0000 Message-ID: <6e101e84370646b2980fef2919344bf7@XCH-RCD-009.cisco.com> References: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> In-Reply-To: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> 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: [10.61.109.25] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: Re: [spring] Minutes X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Nov 2015 09:55:00 -0000 Thanks for posting the minutes. The interoperability report mentioned during the meeting is the EANTC docum= ent presented at the last MPLS/SDN Congress in Paris=20 http://www.eantc.de/fileadmin/eantc/downloads/events/2011-2015/MPLSSDN2015/= EANTC-MPLSSDN2015-WhitePaper_online.pdf Thanks Roberta -----Original Message----- From: spring [mailto:spring-bounces@ietf.org] On Behalf Of bruno.decraene@o= range.com Sent: Thursday, November 05, 2015 5:06 PM To: spring@ietf.org Subject: [spring] Minutes Hi Folks, The minutes have been posted. Thanks to Jon Mitchell and Ignas Bagdonas for taking them. https://www.ietf.org/proceedings/94/minutes/minutes-94-spring Please review for any errors. Thanks, Bruno. ___________________________________________________________________________= ______________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confiden= tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou = copies sans autorisation. Si vous avez recu ce message par erreur, veuillez= le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Le= s messages electroniques etant susceptibles d'alteration, Orange decline to= ute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. This message and its attachments may contain confidential or privileged inf= ormation that may be protected by law; they should not be distributed, used= or copied without authorisation. If you have received this email in error, please notify the sender and dele= te this message and its attachments. As emails may be altered, Orange is not liable for messages that have been = modified, changed or falsified. Thank you. _______________________________________________ spring mailing list spring@ietf.org https://www.ietf.org/mailman/listinfo/spring From nobody Mon Nov 9 07:22:15 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id ABF471A01E2; Mon, 9 Nov 2015 07:22:14 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.902 X-Spam-Level: X-Spam-Status: No, score=-1.902 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id Mar8J0P581G2; Mon, 9 Nov 2015 07:22:11 -0800 (PST) Received: from na01-bl2-obe.outbound.protection.outlook.com (mail-bl2on0116.outbound.protection.outlook.com [65.55.169.116]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9CCE51A8A0C; 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CY1PR0501MB2009; 5:ReqK0+oJlOl+XYC9DZIz2i074MvAoqO9YAM0GX4BR2pELhShYsE5TJH82rqZYacOfCCLhGsyL6ehBjOx4N2fyuXjiDEsK8Lv9YaRAIvH3X8aAjiS+/aEPiVHZjw2WNvvuArnInQq1uYV8s8jTO2s+g==; 24:I3873SAVMte6jy4ftDpCYO8BQIS7lzI9InYGCSmWNBNHvYJ8XjMrHhKc7htHFUnhocAHre+UD5eQ/G3wtqhr5xneos0F1ef+PJah/wggP4w=; 20:gYnuqgNUwPqvmLwaa72DcefgEEAaqo5IKsKyOyBcJHIOYdy/XseaACsFtRAKmCQfV7SiOujJ23CR4LFKskV6+Q== SpamDiagnosticOutput: 1:23 SpamDiagnosticMetadata: NSPM X-OriginatorOrg: juniper.net X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Nov 2015 15:22:06.1657 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY1PR0501MB2009 Archived-At: Cc: idr wg , SPRING WG Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Nov 2015 15:22:14 -0000 Hi Stefano, >> If a BGP route is received that contains a Prefix-SID attribute with an >> Originator SRGB TLV, but the prefix field of the NLRI does not contain a >> host address, the attribute SHOULD be regarded as malformed. If a >> Prefix-SID attribute contains more than one SRGB TLV, it SHOULD be >> regarded as malformed. See section 7 for the treatment of a malformed >> Prefix-SID attribute. >> >> When a route carrying the Prefix-SID attribute is propagated, the >> Originator SRGB TLV (if present) MUST NOT be changed. > why would you need such limitation ? A prefix may have a shorter mask > than 32 (or 128) and still be ok for the Originator SRGB to be there. The SRGB is a property of a node, not a property of a prefix. To make use of the "Originator SRGB", you have to know the node whose property it is. And you have to be able to tunnel packets to that node. In the text I wrote above, the prefix field in the NLRI identifies the node to which the "Originator SRGB" belongs, and the prefix-SID field essentially gives you a node-SID that you can use to tunnel to the node in question. > The Originator-SRGB may only be inserted by the originator of the > prefix, maybe we should emphasize that, but the masklength is mostly > irrelevant here. I don't see that the Originator-SRGB TLV is useful without an explicit identification of the node whose SRGB it describes. Certainly if you are trying to set up an explicitly routed path (perhaps as a loose source route) what you need are the node-SIDs are of the hops you want to specify, and the SRGB of each hop. When you talk about "the originator of the prefix", I think what you really mean is "the last node of the BGP prefix segment". But I don't think that that term necessarily denotes a unique node, as there might be multiple ECMP paths to the prefix, and the prefix-SID does not distinguish among them. E.g., the prefix itself might be multi-homed, or there might be multiple exit points from the SR domain, all of which are equidistant from the prefix. In cases like that, you have no way of knowing whether a label computed from the Originator-SRGB is actually going to be correctly interpreted, because you don't really know the path a packet will take when it is labeled with the prefix-SID. Eric From nobody Mon Nov 9 08:02:59 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CE1241B7EA6; Mon, 9 Nov 2015 08:02:56 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -1.902 X-Spam-Level: X-Spam-Status: No, score=-1.902 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001] autolearn=ham Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id CY6hXSAEckoT; Mon, 9 Nov 2015 08:02:55 -0800 (PST) Received: from na01-bl2-obe.outbound.protection.outlook.com (mail-bl2on0128.outbound.protection.outlook.com [65.55.169.128]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 384911B7EA4; Mon, 9 Nov 2015 08:02:54 -0800 (PST) Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=erosen@juniper.net; 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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Nov 2015 16:02:57 -0000 On 11/6/2015 8:18 AM, Stefano Previdi (sprevidi) wrote: > A prefix may have a shorter mask than 32 (or 128) and still be ok for > the Originator SRGB to be there. Stefano, On further thought, I wonder if I misunderstood the point of your question. If all the addresses falling under a given prefix are loopback addresses of the same node, then the same SRGB might apply to all of them. In that case, it might make sense to have a shorter prefix but still advertise the Originator-SRGB. Is that what you're thinking? But on the other hand, if a node has multiple loopback addresses, it probably won't want the same SID assigned to all of them. Eric From nobody Mon Nov 9 16:54:16 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BF9391B2B8C for ; Mon, 9 Nov 2015 16:54:14 -0800 (PST) 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 PfpHCVRxVdV1 for ; Mon, 9 Nov 2015 16:54:12 -0800 (PST) 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 3D9941B2B61 for ; Mon, 9 Nov 2015 16:54:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=9482; q=dns/txt; s=iport; t=1447116852; x=1448326452; h=message-id:date:from:mime-version:to:subject:references: in-reply-to:content-transfer-encoding; bh=egQGzk+ENI6yEXZsUv1jbS6X4mNVC/AaoChz/LvlNw8=; b=mzux5GgINGE4CRsymddjQ9IWMcxG2SF1q9sdWxNqj2MnSm2yFRm88hj1 j/kqVukovmoMAC2sKWC2b4bplfp8aKJvoBngw1zeDQdYgnddGP9kMEJWj maTvFLShHtxTKeWD2P3rJB338XPbXfHTJtEYO/Rcpq+z4A8YGp3Of9Wg/ 0=; X-IronPort-AV: E=Sophos;i="5.20,267,1444694400"; d="scan'208";a="206559709" Received: from alln-core-2.cisco.com ([173.36.13.135]) by alln-iport-5.cisco.com with ESMTP; 10 Nov 2015 00:53:44 +0000 Received: from [10.32.172.32] ([10.32.172.32]) by alln-core-2.cisco.com (8.14.5/8.14.5) with ESMTP id tAA0rgWf028668; Tue, 10 Nov 2015 00:53:42 GMT Message-ID: <56414016.1050109@cisco.com> Date: Mon, 09 Nov 2015 16:53:42 -0800 From: "Ahmed Bashandy (bashandy)" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: "Les Ginsberg (ginsberg)" , Chris Bowers , "spring@ietf.org" References: <20151005190437.7637.79353.idtracker@ietfa.amsl.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Archived-At: Subject: Re: [spring] New Version Notification for draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Nov 2015 00:54:14 -0000 Thanks a lot Les for the elaborate explanation One small addition to what Les mentioned. The functionality proposed by=20 the draft can be achieved by having a base prefix-SID index and then=20 configuring an offset (instead of an SRGB) for each topology/algorithm=20 pair from that base prefix-SID index value. Based on the configured=20 offset, the router would then calculate the corresponding prefix-SID=20 index for each topology/algorithm pair and advertise it using existing=20 mechanisms Note that the above is NOT a suggestion to use the offset mechanism to=20 configure prefix-SID indices. The objective is to show that the draft=20 does not offer enough benefits to warrant all the questions marks that=20 are outlined in Les's email. Thanks Ahmed On 11/9/2015 1:11 AM, Les Ginsberg (ginsberg) wrote: > Chris - > > I have a number of questions - but in order to properly frame them I ne= ed to recount some history - please bear with me. > > In the very early days of SR there was a proposal to reserve a fixed la= bel range on all routers (16000 - 23999) for the use of SR. This seemed w= orkable but there was concern that the same range would not be available = on all routers so the SR community agreed that we needed to allow the adv= ertisement of a different SRGB range on each SR capable router. > > Then, another concern was raised that a single contiguous range large e= nough to meet the SR requirements might not be available on all routers a= nd therefore we needed to support the advertisement of multiple SRGB rang= es from a given node. This capability has been added - though it has also= raised other concerns regarding how many ranges might be enough and how = to deal with inconsistencies (overlaps) in the advertised ranges should s= ome error occur. > > Now, in support of multiple algorithms/topologies, this draft proposes = that algorithm/topology specific SRGBs be advertised - and that to fully = get the benefits of consistent SID assignment for the same prefix across = algorithms/topologies (the major goal of this draft) that all routers be = able to support identical ranges for each algorithm/topology. (Section 5 = goes into this in detail) - and to be able to allocate new ranges for new= ly configured algorithms/topologies on demand. Section 6 goes on to sugg= est that it would be a wonderful goal if all routers could assign the sam= e base label/range to each algorithm/topology so that the labels could be= derived algorithmically (though you admit this may not always be possibl= e). > > My first question is how do you reconcile this requirement for consiste= ncy on all nodes with the earlier decisions to support inconsistency as r= egards SRGB base values/range sizes? > > My second question is associated with the assumption of a single "node_= index" per node. I for one would be delighted if we could get agreement o= n using a single host address/node (or at least one per AF) for all traff= ic to that node. But this does not meet the deployment requirements in al= l cases and so we support multiple "node_indeces" for a given node. This = means that we do not map SIDs to nodes - we map SIDs to prefixes. So it i= s conceptually more straightforward and less problematic to configure SID= s for prefix ranges. This is in fact how SRMS advertisements are construc= ted i.e. > > (Prefix/Prefix length, Starting SID, Range) > > How would you propose to incorporate this style of SID assignment into = your algorithms? Do you assume a maximum number of node-sids required for= every node in the network and require the range for each algorithm/topol= ogy be sized large enough for the worst case? This seems potentially wast= eful - especially if a deployment chooses to use a particular address for= a topology as a traffic differentiator. > > My third question relates to the algorithm/topology independence of the= SID assignment that you propose. Throughout the document you assume that= you have a single SID for a given prefix and you simply add the appropri= ate algorithm/topology specific SRGB base value to this SID to derive the= forwarding label. However, current protocol advertisements for SIDs incl= ude both algorithm and topology as context for the SID. This reflects the= current SR architecture which has been defined with algorithm/topology a= s an explicit context for a SID. Your proposal fundamentally changes this= and therefore all existing encodings of SID advertisements (prefix reach= ability, SRGB, SRMS advertisements) would have to be changed in a non-bac= kwards compatible way in order to support your proposal. Other than defi= nition of a new SRGB advertisement, you do not discuss this in the draft.= How do you intend to address this major issue? > > Les > > >> -----Original Message----- >> From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Chris Bower= s >> Sent: Monday, October 05, 2015 12:31 PM >> To: spring@ietf.org >> Subject: [spring] FW: New Version Notification for draft-bowers-spring= -adv- >> per-algorithm-label-blocks-02.txt >> >> SPRING WG, >> >> There was quite a lot of discussion in person after we presented draft= - >> bowers-spring-adv-per-algorithm-label-blocks-01 in Prague, and there w= as >> also much discussion on this list about the issue raised by this draft= =2E We have >> made two main additions to this revision of the draft to further this >> discussion. >> >> 1) We have included discussion of multiple topologies in addition to m= ultiple >> algorithms, and we have modified the proposed ISIS extension to handle= >> both multiple topologies and multiple algorithms. >> >> 2) We have tried to accurately describe a proposal, which was outlined= on >> this list, for managing the assignment of per-topology/per-algorithm n= ode >> index values, which we refer to as the "configured offset mapping meth= od". >> >> We welcome feedback from the working group on this draft. >> >> Thanks, >> Chris >> >> -----Original Message----- >> From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] >> Sent: Monday, October 05, 2015 2:05 PM >> To: Uma Chunduri ; Hannes Gredler >> ; Pushpasis Sarkar ; Chris >> Bowers ; Chris Bowers ; >> Uma Chunduri ; Pushpasis Sarkar >> ; Hannes Gredler >> Subject: New Version Notification for draft-bowers-spring-adv-per- >> algorithm-label-blocks-02.txt >> >> >> A new version of I-D, draft-bowers-spring-adv-per-algorithm-label-bloc= ks- >> 02.txt >> has been successfully submitted by Chris Bowers and posted to the IETF= >> repository. >> >> Name: draft-bowers-spring-adv-per-algorithm-label-blocks >> Revision: 02 >> Title: Advertising Per-Topology and Per-Algorithm Label Blocks >> Document date: 2015-10-05 >> Group: Individual Submission >> Pages: 14 >> URL: https://www.ietf.org/internet-drafts/draft-bowers-spri= ng-adv- >> per-algorithm-label-blocks-02.txt >> Status: https://datatracker.ietf.org/doc/draft-bowers-spring-a= dv-per- >> algorithm-label-blocks/ >> Htmlized: https://tools.ietf.org/html/draft-bowers-spring-adv-pe= r- >> algorithm-label-blocks-02 >> Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-bowers-sprin= g-adv-per- >> algorithm-label-blocks-02 >> >> Abstract: >> When segment routing is used in a network that is controlled by a >> link state IGP (such as ISIS or OSPF), each node in the network ca= n >> be assigned one or more index numbers, known as "node-SIDs". The >> node-SIDs are unique within the network, and are known to all the >> nodes in the network. If an ingress node has a data packet to be >> sent to an egress node, the ingress node may select a node-SID >> corresponding to the egress node, and "translate" that node-SID to= an >> MPLS label. The MPLS label represents a particular path to the >> egress node; the path is determined by applying a routing algorith= m >> to a particular view of the network topology and a particular set = of >> metric assignments to the links of that topology. The packet can >> then be forwarded by pushing the label on the packet's label stack= >> and transmitting the packet to the next hop on the corresponding p= ath >> to the egress node. This document compares two different procedur= es >> for translating a node-SID to the MPLS label that represents a pat= h >> chosen by a particular algorithm operating on a particular topolog= y. >> It also specifies the ISIS extensions needed to support one of the= >> procedures (known as the "per-topology/per-algorithm label block" >> procedure). >> >> >> >> >> Please note that it may take a couple of minutes from the time of subm= ission >> until the htmlized version and diff are available at tools.ietf.org. >> >> The IETF Secretariat >> >> _______________________________________________ >> spring mailing list >> spring@ietf.org >> https://www.ietf.org/mailman/listinfo/spring > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring From nobody Tue Nov 10 07:41:01 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 02ACF1B3948 for ; Tue, 10 Nov 2015 07:41:00 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: 2.142 X-Spam-Level: ** X-Spam-Status: No, score=2.142 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FH_RELAY_NODNS=1.451, HELO_EQ_DE=0.35, HELO_MISMATCH_DE=1.448, RDNS_NONE=0.793] 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 UOWs5uyvHR1k for ; Tue, 10 Nov 2015 07:40:58 -0800 (PST) Received: from owl2.lab.dtag.de (unknown [194.25.1.238]) by ietfa.amsl.com (Postfix) with ESMTP id C9B371B3946 for ; Tue, 10 Nov 2015 07:40:57 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by owl2.lab.dtag.de (Postfix) with ESMTP id A2718C97E8; Tue, 10 Nov 2015 16:40:54 +0100 (CET) Received: from Martins-MacBook-Air.local (o.Boggart.lab.dtag.de [62.153.176.78]) by owl2.lab.dtag.de (Postfix) with ESMTPSA id 8B078C97E7; Tue, 10 Nov 2015 16:40:54 +0100 (CET) To: bruno.decraene@orange.com, "spring@ietf.org" References: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> From: Martin Horneffer Message-ID: <56421006.2030808@nic.dtag.de> Date: Tue, 10 Nov 2015 16:40:54 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Archived-At: Subject: Re: [spring] Minutes X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Nov 2015 15:41:00 -0000 Hello Bruno, Jon and Ignas, thank you for the quick minutes! One addition please: @@ -65,2 +65,3 @@ Shahram: I advise not to go that route and just mandate everything use same SRGB +Martin Horneffer: This proposal lets devices which can configure a CA-SRGB stay with it. Only devices not supporting the CA-SRGB would need to implement the virtual LFIB in order to still support anycast segments. This really is the best solution possible. John: we can't reopen the discussion on whether this is a global label - resolved discussion in beginning of SR I'm not perfectly sure however whether my comment was before or after John's. Best regards, Martin Am 05.11.15 um 17:05 schrieb bruno.decraene@orange.com: > Hi Folks, > > The minutes have been posted. > Thanks to Jon Mitchell and Ignas Bagdonas for taking them. > > https://www.ietf.org/proceedings/94/minutes/minutes-94-spring > > Please review for any errors. > > Thanks, > Bruno. > > > _________________________________________________________________________________________________________________________ > > Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc > pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler > a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, > Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. > > This message and its attachments may contain confidential or privileged information that may be protected by law; > they should not be distributed, used or copied without authorisation. > If you have received this email in error, please notify the sender and delete this message and its attachments. > As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified. > Thank you. > > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring > From nobody Tue Nov 10 12:00:25 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 510B21B3E6E; Tue, 10 Nov 2015 12:00:24 -0800 (PST) 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 uR_Fhiwfcgj6; Tue, 10 Nov 2015 12:00:22 -0800 (PST) Received: from rcdn-iport-3.cisco.com (rcdn-iport-3.cisco.com [173.37.86.74]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 60C5A1B3E56; Tue, 10 Nov 2015 12:00:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=4086; q=dns/txt; s=iport; t=1447185621; x=1448395221; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=ZcPcolIP3pFzMrEep7w2ffXy8yXTqjZUu0wR8gqftRs=; b=d+pSGAQUs2+kUWRYy94WKR4L1uhvkQOstPWeHpoJcOjneAQ8L9kJ5mSU 3YgqKa9d75VGxofWvqIuPkA+KSFZSjfLc0DYDEy7dFd5O5pKM9c5N+wmn +tTsc5JCKfLEi/0F286cKiLMoOT7qTe7898ty+tk7SAlgPxsNhllV5VtR U=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: A0APAgCgS0JW/5pdJa1egztTbwa+RAENgWUXCoUlSgIcgS84FAEBAQEBAQGBCoQ1AQEDAQEBASAROgsQAgEIGgImAgICJQsVEAIEAQ0FiCYIDbJ/kF0BAQEBAQEBAQEBAQEBAQEBAQEBAQEUBIEBilGEWYMcgUQBBJZIAY0lnEQBHwEBQoIRHYFWcoQngQcBAQE X-IronPort-AV: E=Sophos;i="5.20,271,1444694400"; d="scan'208";a="49137607" Received: from rcdn-core-3.cisco.com ([173.37.93.154]) by rcdn-iport-3.cisco.com with ESMTP; 10 Nov 2015 20:00:20 +0000 Received: from XCH-RTP-006.cisco.com (xch-rtp-006.cisco.com [64.101.220.146]) by rcdn-core-3.cisco.com (8.14.5/8.14.5) with ESMTP id tAAK0K7i004885 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Tue, 10 Nov 2015 20:00:20 GMT Received: from xch-rtp-015.cisco.com (64.101.220.155) by XCH-RTP-006.cisco.com (64.101.220.146) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Tue, 10 Nov 2015 15:00:19 -0500 Received: from xch-rtp-015.cisco.com ([64.101.220.155]) by XCH-RTP-015.cisco.com ([64.101.220.155]) with mapi id 15.00.1104.000; Tue, 10 Nov 2015 15:00:19 -0500 From: "Acee Lindem (acee)" To: Eric C Rosen , "Stefano Previdi (sprevidi)" Thread-Topic: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 Thread-Index: AQHRGwJy6pvfTXZ/qE2W4H0FcAVzPZ6VrscA Date: Tue, 10 Nov 2015 20:00:19 +0000 Message-ID: References: <56294416.8030807@juniper.net> <5104A350-EA8D-4824-A396-1DC46140BA5D@cisco.com> <5640BA18.7060807@juniper.net> In-Reply-To: <5640BA18.7060807@juniper.net> 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: [10.116.152.203] Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: idr wg , SPRING WG Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." 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Wed, 11 Nov 2015 03:00:39 -0500 Received: from xch-rtp-010.cisco.com ([64.101.220.150]) by XCH-RTP-010.cisco.com ([64.101.220.150]) with mapi id 15.00.1104.000; Wed, 11 Nov 2015 03:00:39 -0500 From: "Stefano Previdi (sprevidi)" To: Eric C Rosen Thread-Topic: [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 Thread-Index: AQHRDQaNSu+O5jvuAkmSupOY8ZJPb56PZPUAgATk8YCAAp4BgA== Date: Wed, 11 Nov 2015 08:00:39 +0000 Message-ID: <72BCC203-046B-4CEE-B647-39BD7420D51C@cisco.com> References: <56294416.8030807@juniper.net> <5104A350-EA8D-4824-A396-1DC46140BA5D@cisco.com> <5640C3A3.8070300@juniper.net> In-Reply-To: <5640C3A3.8070300@juniper.net> 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: [10.61.96.73] Content-Type: text/plain; charset="Windows-1252" Content-ID: <85582ABFE852AC4AA96F950A9143C9F5@emea.cisco.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Cc: idr wg , SPRING WG Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Nov 2015 08:00:42 -0000 On Nov 9, 2015, at 5:02 PM, Eric C Rosen wrote: >=20 > On 11/6/2015 8:18 AM, Stefano Previdi (sprevidi) wrote: >> A prefix may have a shorter mask than 32 (or 128) and still be ok for >> the Originator SRGB to be there. >=20 > Stefano, >=20 > On further thought, I wonder if I misunderstood the point of your questio= n. If all the addresses falling under a given prefix are loopback addresse= s of the same node, then the same SRGB might apply to all of them. yes, but note that nothing mandates that we use only loopback addresses and= nothing mandates a loopback address to be a /32. > In that case, it might make sense to have a shorter prefix but still adv= ertise the Originator-SRGB. Is that what you're thinking? yes and more widely, I don=92t want to constrain the advertisement of the O= riginator-SRGB to a /32 (or even to a loopback interface prefix). s. =20 > But on the other hand, if a node has multiple loopback addresses, it pro= bably won't want the same SID assigned to all of them. >=20 > Eric From nobody Thu Nov 12 17:03:49 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id A381A1B3BB5 for ; Thu, 12 Nov 2015 17:03:47 -0800 (PST) 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 yrWe7Eqq8nnE for ; Thu, 12 Nov 2015 17:03:45 -0800 (PST) Received: from rcdn-iport-5.cisco.com (rcdn-iport-5.cisco.com [173.37.86.76]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 99AD81B3BB0 for ; Thu, 12 Nov 2015 17:03:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=7330; q=dns/txt; s=iport; t=1447376625; x=1448586225; h=message-id:date:from:mime-version:to:subject:references: in-reply-to; bh=foX5K2hp8pP4i+uC/ycO+Ip3VvL5km+XhzOB3fbhfpQ=; b=aRpBAExEvGs6XaTmFHWRZMM0DSz5h0cS+GiR1mog2PG0VtqJKDltCWPI pZAQohVKigelMIststuWc6noxFkgm1WfyMA95gDzAdGTupQkJUvQje3pa TZxI5UMhCUEtU4Vpb20y55wuxnldp2hWS30bUnK4Pgrbfe8tr9crrQxUa w=; X-IronPort-AV: E=Sophos; i="5.20,284,1444694400"; d="scan'208,217"; a="46379134" Received: from rcdn-core-6.cisco.com ([173.37.93.157]) by rcdn-iport-5.cisco.com with ESMTP; 13 Nov 2015 01:03:45 +0000 Received: from [10.32.173.22] ([10.32.173.22]) by rcdn-core-6.cisco.com (8.14.5/8.14.5) with ESMTP id tAD13iWQ019142; Fri, 13 Nov 2015 01:03:44 GMT Message-ID: <564536F0.4030209@cisco.com> Date: Thu, 12 Nov 2015 17:03:44 -0800 From: "Ahmed Bashandy (bashandy)" User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Lizhenbin , "spring@ietf.org" References: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA61266@nkgeml506-mbx.china.huawei.com> In-Reply-To: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA61266@nkgeml506-mbx.china.huawei.com> Content-Type: multipart/alternative; boundary="------------080502090600090708040609" Archived-At: Subject: Re: [spring] Implementation Report on draft-ietf-spring-segment-routing-ldp-interop X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Nov 2015 01:03:47 -0000 This is a multi-part message in MIME format. --------------080502090600090708040609 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi Robin The mapping server is already implemented. And it is not that complex at all As for the support of inter-AS option "C", there are two solutions (1) "draft-filsfils-spring-sr-recursing-info-01" provides a way to use the prefix-SID of one address for another one. So refering to the second figure in the your draft "draft-li-spring-compare-sr-ldp-rsvpte-00", ASBR12 can inject the IP addresses of "PE21" and "PE22" in the IGP of AS1 and use the IP address of ASBR11 itself as the "Recursing SID Address". (2) "draft-ietf-spring-segment-routing-ldp-interop" suggests using BGP-LU to distribute the remote domain information as Jon Mitchell mention in his email. At the first glance, it may seem like an issue for some platforms. However, as it is mentioned in "draft-bashandy-rtgwg-bgp-pic-02" which was presented in the last IETF, it is actually very easy to flatten a 2 level recursion into a single level of recursion, thereby supporting any hardware capability Thanks Ahmed On 11/2/2015 5:21 PM, Lizhenbin wrote: > > Hi Folks, > > I proposed my concern on the implementation of interoperability > between LDP and SR again in IETF. I also would like to remind you of > my draft again: > > https://tools.ietf.org/html/draft-li-spring-compare-sr-ldp-rsvpte-00 > > In this draft I explained the possible challenges of SR comparing LDP. > And in sec 6 I summary the possible challenge of Interoperability > between SR and LDP/RSVP-TE. Until now I believe that there will be > much challege for the implementation. In fact in order to solve the > possbile issue I mentioned in the draft, the mapping server has been > introduced. Is it some central-control based solution in the IGP/LDP > distributed environment? I worried that there still more issues which > have to be solved and propose great challenge for the implementor on > the feature and when new mechanisms are introduced they will propose > new challenges again. If so, this may be nightmare for the developer > of the feature. Hope if there were the implementation the > implementation report on > draft-ietf-spring-segment-routing-ldp-interop-00 can be publised > accomanying the draft to demonstrate what can be done and maye what > can not be done. This will be much helpful to the implementors and > operators to consider their possible choice to cope with this interop > issue: take the challenge, leave it or replace the LDP network with SR > all at once without introducing the interoperability issue. > > Best Regards, > > Zhenbin(Robin) > > > > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring --------------080502090600090708040609 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi Robin

The mapping server is already implemented. And it is not that complex at all

As for the support of inter-AS option "C", there are two solutions
(1) "draft-filsfils-spring-sr-recursing-info-01" provides a way to use the prefix-SID of one address for another one. So refering to the second figure in the your draft "draft-li-spring-compare-sr-ldp-rsvpte-00", ASBR12 can  inject the IP addresses of "PE21" and "PE22" in the IGP of AS1 and use the IP address of ASBR11 itself as the "Recursing SID Address".
(2) "draft-ietf-spring-segment-routing-ldp-interop" suggests using BGP-LU to distribute the remote domain information as Jon Mitchell mention in his email. At the first glance, it may seem like an issue for some platforms. However, as it is mentioned in "draft-bashandy-rtgwg-bgp-pic-02" which was presented in the last IETF, it is actually very easy to flatten a 2 level recursion into a single level of recursion, thereby supporting any hardware capability

Thanks

Ahmed

 

On 11/2/2015 5:21 PM, Lizhenbin wrote:

Hi Folks,

I proposed my concern on the implementation of interoperability between LDP and SR again in IETF. I also would like to remind you of my draft again:

https://tools.ietf.org/html/draft-li-spring-compare-sr-ldp-rsvpte-00

In this draft I explained the possible challenges of SR comparing LDP. And in sec 6 I summary the possible challenge of Interoperability between SR and LDP/RSVP-TE. Until now I believe that there will be much challege for the implementation. In fact in order to solve the possbile issue I mentioned in the draft, the mapping server has been introduced. Is it some central-control based solution in the IGP/LDP distributed environment? I worried that there still more issues which have to be solved and propose great challenge for the implementor on the feature and when new mechanisms are introduced they will propose new challenges again. If so, this may be nightmare for the developer of the feature. Hope if there were the implementation the implementation report on draft-ietf-spring-segment-routing-ldp-interop-00 can be publised accomanying the draft to demonstrate what can be done and maye what can not be done. This will be much helpful to the implementors and operators to consider their possible choice to cope with this interop issue: take the challenge, leave it or replace the LDP network with SR all at once without introducing the interoperability issue.

 

 

Best Regards,

Zhenbin(Robin)



_______________________________________________
spring mailing list
spring@ietf.org
https://www.ietf.org/mailman/listinfo/spring

--------------080502090600090708040609-- From nobody Thu Nov 12 23:15:34 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 9AD9E1B4160 for ; Thu, 12 Nov 2015 23:15:33 -0800 (PST) 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 Nk6AJavE4wMW for ; Thu, 12 Nov 2015 23:15:32 -0800 (PST) Received: from mail-wm0-x22b.google.com (mail-wm0-x22b.google.com [IPv6:2a00:1450:400c:c09::22b]) (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 54AF41B4162 for ; Thu, 12 Nov 2015 23:15:30 -0800 (PST) Received: by wmec201 with SMTP id c201so67392877wme.0 for ; Thu, 12 Nov 2015 23:15:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=Q6P/yAjWkQbM5mVeyHKEuLmCAJnlqCA9+1m11V/u9hM=; b=wW2i4pWu8/jXBbPbZ9jSdCXEKQmUanu82L5E45vzGrjkR2RwgaS9nvxK1QNls6m8R0 XvneaeG1vWi1T/L3TV3g9BVftbhIP4t3VfgnKi7b9NIY7AGgqc8gc0kPfUqWIBqyZ1zd tL+nUTn9dbjPF8XcBz0kw2UC+86zpDz1n8VYp7Y0t6ORf0pKTHGjMqMHmbb9RERW1Opu +3XU3mDpIeqYT3AyUrJBVjM3ZzAhfWDNetGZa4h44243g9k961rWYFmlF6tz1nttd+Fm QqwqL9lq4bpq/SMzs1f1/sLAtkd+M0Cm+KrDgz3dOLANyETeuMgskqGc7HRXErBlgLs4 wMQQ== MIME-Version: 1.0 X-Received: by 10.194.184.7 with SMTP id eq7mr20598926wjc.26.1447398928890; Thu, 12 Nov 2015 23:15:28 -0800 (PST) Sender: rraszuk@gmail.com Received: by 10.194.204.195 with HTTP; Thu, 12 Nov 2015 23:15:28 -0800 (PST) In-Reply-To: <564536F0.4030209@cisco.com> References: <5A5B4DE12C0DAC44AF501CD9A2B01A8D8CA61266@nkgeml506-mbx.china.huawei.com> <564536F0.4030209@cisco.com> Date: Fri, 13 Nov 2015 08:15:28 +0100 X-Google-Sender-Auth: 6nsYNQEKEsI7gifuIiwui5Ls53o Message-ID: From: Robert Raszuk To: "Ahmed Bashandy (bashandy)" Content-Type: multipart/alternative; boundary=047d7b873dd4014607052466d3b8 Archived-At: Cc: "spring@ietf.org" , Lizhenbin Subject: Re: [spring] Implementation Report on draft-ietf-spring-segment-routing-ldp-interop X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Nov 2015 07:15:33 -0000 --047d7b873dd4014607052466d3b8 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable > The mapping server is already implemented. And it is not that complex at > all > =E2=80=8BGreat news ! Can you send link to github containing the src code ? Thx, Robert=E2=80=8B. --047d7b873dd4014607052466d3b8 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
=C2=A0
The mapping server is already implemented. And it is not that complex at all

=E2=80=8BGreat news ! Can you send link to github containing the src c= ode ?=C2=A0

Thx,
=
Robert=E2=80=8B.

<= /div> --047d7b873dd4014607052466d3b8-- From nobody Sun Nov 15 09:40:39 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 041601A88B2 for ; Sun, 15 Nov 2015 09:40:39 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -4.786 X-Spam-Level: X-Spam-Status: No, score=-4.786 tagged_above=-999 required=5 tests=[BAYES_50=0.8, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-0.585, 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 6I38EJUP_7MX for ; Sun, 15 Nov 2015 09:40:36 -0800 (PST) Received: from smtp-fr.alcatel-lucent.com (fr-hpida-esg-02.alcatel-lucent.com [135.245.210.21]) (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 3A4561A88AF for ; Sun, 15 Nov 2015 09:40:36 -0800 (PST) Received: from fr712usmtp2.zeu.alcatel-lucent.com (unknown [135.239.2.42]) by Websense Email Security Gateway with ESMTPS id 14D36A5A336D9; Sun, 15 Nov 2015 17:40:31 +0000 (GMT) Received: from FR711WXCHHUB01.zeu.alcatel-lucent.com (fr711wxchhub01.zeu.alcatel-lucent.com [135.239.2.111]) by fr712usmtp2.zeu.alcatel-lucent.com (GMO) with ESMTP id tAFHeYmv031694 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Sun, 15 Nov 2015 18:40:34 +0100 Received: from FR711WXCHMBA07.zeu.alcatel-lucent.com ([169.254.3.17]) by FR711WXCHHUB01.zeu.alcatel-lucent.com ([135.239.2.111]) with mapi id 14.03.0195.001; Sun, 15 Nov 2015 18:40:34 +0100 From: "Henderickx, Wim (Wim)" To: "Les Ginsberg (ginsberg)" , Chris Bowers , "spring@ietf.org" Thread-Topic: [spring] New Version Notification for draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt Thread-Index: AQHRH8y6a9wynl6SM0Ovpc6QePupvQ== Date: Sun, 15 Nov 2015 17:40:33 +0000 Message-ID: <2364A0E2-274C-4503-A9DC-74DEE5B32B01@alcatel-lucent.com> Accept-Language: nl-BE, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/0.0.0.151008 x-originating-ip: [135.239.27.39] Content-Type: text/plain; charset="utf-8" Content-ID: <921625C118F9764FAB9C46FB1606583B@exchange.lucent.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: Re: [spring] New Version Notification for draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 15 Nov 2015 17:40:39 -0000 SSBhbHNvIGRvbuKAmXQgc2VlIHRoZSBiaWcgdmFsdWUgYWRkIG9uIHRoaXMgZHJhZnQgZnJvbSB3 aGF0IHdlIGhhdmUuIEdpdmVuIGl0IGludHJvZHVjZXMgYmFja3dhcmQgY29tcGF0aWJpbGl0eSBp c3N1ZXMgZnJvbSBleGlzdGluZyBpbXBsZW1lbnRhdGlvbi9kZXBsb3ltZW50cyBJIGRvbuKAmXQg c2VlIHdoeSB3ZSBzaG91bGQgcHJvY2VlZCB3aXRoIHRoaXMgd29yayBpbiB0aGUgV0cuIA0KDQoN Ck9uIDA5LzExLzE1IDEwOjExLCAic3ByaW5nIG9uIGJlaGFsZiBvZiBMZXMgR2luc2JlcmcgKGdp bnNiZXJnKSIgPHNwcmluZy1ib3VuY2VzQGlldGYub3JnIG9uIGJlaGFsZiBvZiBnaW5zYmVyZ0Bj aXNjby5jb20+IHdyb3RlOg0KDQo+Q2hyaXMgLQ0KPg0KPkkgaGF2ZSBhIG51bWJlciBvZiBxdWVz dGlvbnMgLSBidXQgaW4gb3JkZXIgdG8gcHJvcGVybHkgZnJhbWUgdGhlbSBJIG5lZWQgdG8gcmVj b3VudCBzb21lIGhpc3RvcnkgLSBwbGVhc2UgYmVhciB3aXRoIG1lLg0KPg0KPkluIHRoZSB2ZXJ5 IGVhcmx5IGRheXMgb2YgU1IgdGhlcmUgd2FzIGEgcHJvcG9zYWwgdG8gcmVzZXJ2ZSBhIGZpeGVk IGxhYmVsIHJhbmdlIG9uIGFsbCByb3V0ZXJzICgxNjAwMCAtIDIzOTk5KSBmb3IgdGhlIHVzZSBv 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X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR0501MB2015 Archived-At: Cc: idr wg , SPRING WG Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 16 Nov 2015 14:44:32 -0000 On 11/10/2015 3:00 PM, Acee Lindem (acee) wrote: > I agree the predominant use case will be advertisement of a loopback. > However, independent of whether or not the Originator-SRGB TLV is > included, I see no reason why a BGP Speaker could not associate a > label-index with a locally attached subnet. I agree that a label-index could be associated with a prefix, I didn't mean to suggest otherwise. But what does it mean exactly to associate an originator-SRGB with a prefix (other than a host address)? On 11/11/2015 3:00 AM, Stefano Previdi (sprevidi) wrote: > I don’t want to constrain the advertisement of the Originator-SRGB to > a /32 (or even to a loopback interface prefix). Do you have an example in mind where it is useful to advertise an Originator SRGB when the prefix in the NLRI is not a host address? From nobody Mon Nov 16 23:49:26 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 81EF71B2BEF; Mon, 16 Nov 2015 23:49:23 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -15.086 X-Spam-Level: X-Spam-Status: No, score=-15.086 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, RP_MATCHES_RCVD=-0.585, SPF_PASS=-0.001, 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 GR2F2oOkJHJ3; Mon, 16 Nov 2015 23:49:22 -0800 (PST) Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 6114C1A1A1C; Mon, 16 Nov 2015 23:49:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=1414; q=dns/txt; s=iport; t=1447746562; x=1448956162; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=DpnCjjf6tzsaW6rpQJrl+3GWvV0Ksbqwv7AF/9tA9aM=; b=OXnckV4UMzlS1aExS4NSeD0t+AwthQGAHLvdiEjA+zritSHcYtpGxbg8 x1Ku7ZmkVcSKir25H4T7TtsaMfSpojAVKYT5MP7tjceXvBRx5WCa4flwo jJm5NCfkqTYLIbQnM3Gzwro0PMyyq4bHlyAlSaORpBU40zVbhYGVifg/V c=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0D1AQDV2kpW/4QNJK1egzuBQga+XgENg?= =?us-ascii?q?WWGEAIcgS44FAEBAQEBAQGBCoQ0AQEBAwEjEUUFCwIBCBgCAiYCAgIwFRACBA4?= =?us-ascii?q?FiCYIqnyQQQEBAQEBAQEBAQEBAQEBAQEBAQEBARiBAYVTghCCboRxgwQvgRUBB?= =?us-ascii?q?JZJAY0mnEQBHwEBQoIRHYFWcoQDgQcBAQE?= X-IronPort-AV: E=Sophos;i="5.20,306,1444694400"; d="scan'208";a="51249057" Received: from alln-core-10.cisco.com ([173.36.13.132]) by rcdn-iport-1.cisco.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 17 Nov 2015 07:49:21 +0000 Received: from XCH-RTP-007.cisco.com (xch-rtp-007.cisco.com [64.101.220.147]) by alln-core-10.cisco.com (8.14.5/8.14.5) with ESMTP id tAH7nLn0015340 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Tue, 17 Nov 2015 07:49:21 GMT Received: from xch-rtp-010.cisco.com (64.101.220.150) by XCH-RTP-007.cisco.com (64.101.220.147) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Tue, 17 Nov 2015 02:49:20 -0500 Received: from xch-rtp-010.cisco.com ([64.101.220.150]) by XCH-RTP-010.cisco.com ([64.101.220.150]) with mapi id 15.00.1104.000; Tue, 17 Nov 2015 02:49:20 -0500 From: "Stefano Previdi (sprevidi)" To: Eric C Rosen Thread-Topic: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 Thread-Index: AQHRDQaNSu+O5jvuAkmSupOY8ZJPb56PZPUAgATZkQCAAeAXgIAJFbiAgAEeYoA= Date: Tue, 17 Nov 2015 07:49:20 +0000 Message-ID: <7E84CCA4-1BF7-4D9C-A2AF-EC16877F7A90@cisco.com> References: <56294416.8030807@juniper.net> <5104A350-EA8D-4824-A396-1DC46140BA5D@cisco.com> <5640BA18.7060807@juniper.net> <5649EBC7.5000505@juniper.net> In-Reply-To: <5649EBC7.5000505@juniper.net> 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: [10.61.199.77] Content-Type: text/plain; charset="utf-8" Content-ID: <9349B92819408643AFC6BD847CC398B5@emea.cisco.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: idr wg , SPRING WG , "Acee Lindem \(acee\)" Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." 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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Nov 2015 14:53:09 -0000 [Eric] Do you have an example in mind where it is useful to advertise an Originator SRGB when the prefix in the NLRI is not a host address? [Stefano] in fact I don’t have any good example where a /32 (/128) must be enforced… Well, that's not the question I asked ;-) Given that the SRGB is a property of a node, it seems to make sense to associate an advertised SRGB with the address of a node. As I explained, one can use this by pushing on a label that is computed by combining a domain-wide unique SID with the node's SRGB, and then pushing on a label that causes the packet to be delivered to the node in question. However, I can see Acee's point that (if I understand it correctly) that all the nodes on a given subnet might use the same SRGB. Suppose we modify my suggested text as follows: --------------------------- OLD When a BGP speaker attaches a Prefix-SID attribute to a given route, the Originator SRGB TLV MUST NOT be included in the attribute unless the following conditions hold: - The prefix field of the route's NLRI contains a host address (i.e., a /32 IPv4 address or a /128 IPv6 address). - The value of the Originator SRGB TLV specifies the SRGB of the node that is identified by the prefix field of the NLRI. If a BGP route is received that contains a Prefix-SID attribute with an Originator SRGB TLV, but the prefix field of the NLRI does not contain a host address, the attribute SHOULD be regarded as malformed. If aPrefix-SID attribute contains more than one SRGB TLV, it SHOULD be regarded as malformed. See section 7 for the treatment of a malformed Prefix-SID attribute. When a route carrying the Prefix-SID attribute is propagated, the Originator SRGB TLV (if present) MUST NOT be changed. NEW If a BGP speaker attaches a Prefix-SID attribute to a given route, and if the Prefix-SID attribute includes the Originator SRGB TLV, then: - If the prefix field of the route's NLRI contains a host address (i.e., a /32 IPv4 address or a /128 IPv6 address), the Originator SRGB TLV specifies the SRGB of the node to whom the host address belongs - If the prefix field of the route's NLRI does not contain a host address, the Originator SRGB TLV specifies the SRGB that is used by the set of nodes whose host addresses match the prefix, but for which there is no "more specific" match that specifies a different Originator SRGB. When a route carrying the Prefix-SID attribute is propagated, the Originator SRGB TLV (if present) MUST NOT be changed. -------------------- This new text omits the enforcement, allows an SRGB to be advertised for an entire subnet (as suggested by Acee), but still explains how to figure out which nodes are using the specified SRGB. Does this modification satisfy your objection? From nobody Tue Nov 17 07:31:35 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 4B69A1A9135; Tue, 17 Nov 2015 07:31:34 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -15.086 X-Spam-Level: X-Spam-Status: No, score=-15.086 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, RP_MATCHES_RCVD=-0.585, SPF_PASS=-0.001, 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 EpFoYKpSIDPA; Tue, 17 Nov 2015 07:31:32 -0800 (PST) Received: from rcdn-iport-9.cisco.com (rcdn-iport-9.cisco.com [173.37.86.80]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 40D421A912F; Tue, 17 Nov 2015 07:31:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=4368; q=dns/txt; s=iport; t=1447774292; x=1448983892; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=bnbmOJwTTkbc1ulZTbgEXUTAttGFbSeItJwExWzKyto=; b=myhN7vuRh0vmP3LELruxrIEzaGahXxZiXitZWlqoNruk/z8a7Gwu3djV IcIA8ZP5i+A0ZjUIaeRpLKcxZAuAsFvDj0ZKkECMjjs15nddA8dEGwn9G FnN/V3cM550z+HTykAH8bQwQ8QykefQDlUAmN3HYm1JxHLG11nWw3mGb6 g=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0D+AQDoRktW/5tdJa1egzuBQga+WwENg?= =?us-ascii?q?WWGEAIcgTI4FAEBAQEBAQGBCoQ0AQEBAwEjEUUFCwIBCBgCAiYCAgIwFRACBA4?= =?us-ascii?q?FiCYIq2WQPAEBAQEBAQEBAQEBAQEBAQEBAQEBARiBAYVTghCCboRZgxwvgRUBB?= =?us-ascii?q?IdEjwUBjSqBW5Z4g3EBHwEBQoIRHYFWcoQDgQcBAQE?= X-IronPort-AV: E=Sophos;i="5.20,308,1444694400"; d="scan'208";a="45535123" Received: from rcdn-core-4.cisco.com ([173.37.93.155]) by rcdn-iport-9.cisco.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Nov 2015 15:31:31 +0000 Received: from XCH-RTP-011.cisco.com (xch-rtp-011.cisco.com [64.101.220.151]) by rcdn-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id tAHFVVHB031132 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Tue, 17 Nov 2015 15:31:31 GMT Received: from xch-rtp-010.cisco.com (64.101.220.150) by XCH-RTP-011.cisco.com (64.101.220.151) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Tue, 17 Nov 2015 10:31:30 -0500 Received: from xch-rtp-010.cisco.com ([64.101.220.150]) by XCH-RTP-010.cisco.com ([64.101.220.150]) with mapi id 15.00.1104.000; Tue, 17 Nov 2015 10:31:30 -0500 From: "Stefano Previdi (sprevidi)" To: Eric C Rosen Thread-Topic: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 Thread-Index: AQHRDQaNSu+O5jvuAkmSupOY8ZJPb56PZPUAgATZkQCAAeAXgIAJFbiAgAEeYoCAAHZGAIAACtUA Date: Tue, 17 Nov 2015 15:31:30 +0000 Message-ID: <2F05F2A0-63BF-47EB-9E7B-7F722337FFF5@cisco.com> References: <56294416.8030807@juniper.net> <5104A350-EA8D-4824-A396-1DC46140BA5D@cisco.com> <5640BA18.7060807@juniper.net> <5649EBC7.5000505@juniper.net> <7E84CCA4-1BF7-4D9C-A2AF-EC16877F7A90@cisco.com> <564B3F3A.3070808@juniper.net> In-Reply-To: <564B3F3A.3070808@juniper.net> 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: [10.61.199.77] Content-Type: text/plain; charset="utf-8" Content-ID: <0E72E6F30307FF458980651F24FD3A57@emea.cisco.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: idr wg , SPRING WG , "Acee Lindem \(acee\)" Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." 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Tue, 17 Nov 2015 17:15:46 +0000 To: "Stefano Previdi (sprevidi)" References: <56294416.8030807@juniper.net> <5104A350-EA8D-4824-A396-1DC46140BA5D@cisco.com> <5640BA18.7060807@juniper.net> <5649EBC7.5000505@juniper.net> <7E84CCA4-1BF7-4D9C-A2AF-EC16877F7A90@cisco.com> <564B3F3A.3070808@juniper.net> <2F05F2A0-63BF-47EB-9E7B-7F722337FFF5@cisco.com> From: Eric C Rosen Message-ID: <564B60BF.2050705@juniper.net> Date: Tue, 17 Nov 2015 12:15:43 -0500 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <2F05F2A0-63BF-47EB-9E7B-7F722337FFF5@cisco.com> Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [66.129.241.11] X-ClientProxiedBy: CO2PR05CA011.namprd05.prod.outlook.com (10.141.241.139) To BY2PR0501MB2005.namprd05.prod.outlook.com (25.163.197.16) X-Microsoft-Exchange-Diagnostics: 1; BY2PR0501MB2005; 2:FtsjnSYhhZbnmDKJVJtiMl30Qb+dtEljdmGsinBECnvSSqaiBzO/62wSeuWWfw6gWL0vkS48CpEkFmZQayYEOcqz92byTIDQGoMVryUk5mi+krkFGjuQxJaH9471IZI4Zc01+f/oLOk/85YWE/Cj/+c7Hnxx26SSTFeKHpM6sgQ=; 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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 17 Nov 2015 17:16:07 -0000 On 11/17/2015 10:31 AM, Stefano Previdi (sprevidi) wrote: > to me it makes sense to advertise the SRGB along with ANY prefix > originated by that node, regardless the mask-length. But in that case, you don't know who the originator node is. Could you explain to me how you use an SRGB when you don't know the node to which it belongs? From nobody Tue Nov 17 18:20:02 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 5A2321B3813; Tue, 17 Nov 2015 18:20:00 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -15.086 X-Spam-Level: X-Spam-Status: No, score=-15.086 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, RP_MATCHES_RCVD=-0.585, SPF_PASS=-0.001, 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 P2eYhvRJ-ZNs; Tue, 17 Nov 2015 18:19:59 -0800 (PST) Received: from alln-iport-3.cisco.com (alln-iport-3.cisco.com [173.37.142.90]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 148371B3814; Tue, 17 Nov 2015 18:19:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=2050; q=dns/txt; s=iport; t=1447813199; x=1449022799; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=uiq/wobU6rJiAu6m5V8PQnWW0LJI3JdIZcsTgiMlEbM=; b=EZ6pTPxMCYcnxhHKsmh3j91XsLAaG03IWEQou3WgIZeuVKD8abqvwfrX 0P2tE43sEf/F8PtgAOMMGUqyJCCdGiIzP2g3KS4HljcBNBcSgecU5xy6q /dnXcJIVgkW8O/fOWMHwkZM1IZLWX1qi5TET2uAQwPKXMKaFnVFI8RnFF w=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0D1AQDD30tW/4cNJK1egzuBQga+XgENg?= =?us-ascii?q?WWGDwIcgS84FAEBAQEBAQGBCoQ1AQEEIxFFEAIBCBgCAiYCAgIwFRACBAENBYg?= =?us-ascii?q?urSyQMAEBAQEBAQEBAQEBAQEBAQEBAQEBARiBAYpRhFkYgwSBRAEElkkBjSqcR?= =?us-ascii?q?AEfAQFCghEdgVZyhAWBBwEBAQ?= X-IronPort-AV: E=Sophos;i="5.20,310,1444694400"; d="scan'208";a="208923668" Received: from alln-core-2.cisco.com ([173.36.13.135]) by alln-iport-3.cisco.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 18 Nov 2015 02:19:58 +0000 Received: from XCH-RTP-006.cisco.com (xch-rtp-006.cisco.com [64.101.220.146]) by alln-core-2.cisco.com (8.14.5/8.14.5) with ESMTP id tAI2JwCL025485 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Wed, 18 Nov 2015 02:19:58 GMT Received: from xch-rtp-015.cisco.com (64.101.220.155) by XCH-RTP-006.cisco.com (64.101.220.146) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Tue, 17 Nov 2015 21:19:57 -0500 Received: from xch-rtp-015.cisco.com ([64.101.220.155]) by XCH-RTP-015.cisco.com ([64.101.220.155]) with mapi id 15.00.1104.000; Tue, 17 Nov 2015 21:19:57 -0500 From: "Acee Lindem (acee)" To: Eric C Rosen , "Stefano Previdi (sprevidi)" Thread-Topic: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 Thread-Index: AQHRGwJy6pvfTXZ/qE2W4H0FcAVzPZ6VrscAgAlploCAAR5eAIAAdkoAgAAK1wCAAB0egIAARDcA Date: Wed, 18 Nov 2015 02:19:57 +0000 Message-ID: References: <56294416.8030807@juniper.net> <5104A350-EA8D-4824-A396-1DC46140BA5D@cisco.com> <5640BA18.7060807@juniper.net> <5649EBC7.5000505@juniper.net> <7E84CCA4-1BF7-4D9C-A2AF-EC16877F7A90@cisco.com> <564B3F3A.3070808@juniper.net> <2F05F2A0-63BF-47EB-9E7B-7F722337FFF5@cisco.com> <564B60BF.2050705@juniper.net> In-Reply-To: <564B60BF.2050705@juniper.net> 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: [10.116.152.196] Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: idr wg , SPRING WG Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." 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Wed, 18 Nov 2015 15:55:30 +0000 To: "Acee Lindem (acee)" , "Stefano Previdi (sprevidi)" References: <56294416.8030807@juniper.net> <5104A350-EA8D-4824-A396-1DC46140BA5D@cisco.com> <5640BA18.7060807@juniper.net> <5649EBC7.5000505@juniper.net> <7E84CCA4-1BF7-4D9C-A2AF-EC16877F7A90@cisco.com> <564B3F3A.3070808@juniper.net> <2F05F2A0-63BF-47EB-9E7B-7F722337FFF5@cisco.com> <564B60BF.2050705@juniper.net> From: Eric C Rosen Message-ID: <564C9F6B.8000802@juniper.net> Date: Wed, 18 Nov 2015 10:55:23 -0500 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 8bit X-Originating-IP: [66.129.241.12] X-ClientProxiedBy: CO1PR06CA021.namprd06.prod.outlook.com (10.242.160.11) To BY2PR0501MB2007.namprd05.prod.outlook.com (25.163.197.18) X-Microsoft-Exchange-Diagnostics: 1; BY2PR0501MB2007; 2:6y2bA1XkjptOXD73EJORp0FxMCDS/lKTy8+5MO1ESyD+FSKmlHMWq0HHhLwp4VWYTe38JEaVgSV/ZNhkryXebQzBv8I0zqMhj52T50//72ZqPD4F/c0UjcmeVLhKdUl9uxvq/o8A2a12iKLXH2YwuWcnNwi0aT6EerPJqodnRjo=; 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BY2PR0501MB2007; 5:uEFHf5EtEmBhZVz3zgCGZZ4PyjK7Vj0sYZouyQmFd8BVnBvZdy31WNeIi2k9rkvoA8T07WDSshNDNX2kwwHfoe2lywYsHuzdyMlm9nmFDR4aorrSyQIATOA7lOjGdngwzKp4fe7TM0wTDy6FCz3wYQ==; 24:xUcHetDfLr5Qq7d56tgv5jx02kuP7UiAPJf3PrDAn4zAV5Y9YGHxSZDbzCs4tqPYSaUNkOwWYm1HbrWCUEhllzj0bAlExPPVjBnaDhvvfxk=; 20:q4yv7WMzqTsRAEXpWcJsVRlYTVtXOYsKtfoT0zAuU00TNC6Xq8DJBa9MlCYIL0zd69zbkafnw9YkIR4AGeg1CQ== SpamDiagnosticOutput: 1:23 SpamDiagnosticMetadata: NSPM X-OriginatorOrg: juniper.net X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Nov 2015 15:55:30.4937 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR0501MB2007 Archived-At: Cc: idr wg , SPRING WG Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Nov 2015 15:55:55 -0000 Hi Acee, > However, it still may be simpler operationally to advertise a Global > Prefix-SID for a locally attached subnet comprised of nodes offering > a particular service. I don't think I suggested anything that would prevent one from advertising a domain-wide prefix-SID for a locally attached subnet. > With respect to the Originator SRGB, I never could fully appreciate > the advantages of advertising it. That suggests that you don't really see the use case for it. I believe the intended use case is the following. Suppose node S has a packet to send to prefix D, and S knows (through some magic) that it wants the packet to traverse nodes A, B, and C (i.e., to follow the path S-A-B-C-D), even though this is not the default shortest path from S to D. Let's also suppose that this is a loose source route, i.e., that A is not adjacent to B, B is not adjacent to C, and C is not adjacent to D. In order for S to force a packet through this loose source route, it is necessary for S to push labels on the packet in the following order: 1. Push C's label for D. 2. Push B's label for C. 3. Push A's label for B. 4. Push whatever label will get the packet from S to A. To compute label 1 above, S must know (a) C's SRGB and (b) the (global) prefix-SID for D. To compute label 2 above, S must know (a) B's SRGB and (b) the (global) prefix-SID for C. To compute label 3 above, S must know (a) A's SRGB and (b) the (global) prefix-SID for B. If A, B, and C, each originates a BGP UPDATE with its own loopback address as prefix, then each can advertise its own SRGB by attaching a Prefix-SID attribute to the UPDATE, and specifying its SRGB in the Originator-SRGB field of the Prefix-SID attribute. I think all the use cases for Originator-SRGB will be like this; (a) tunnel to the node whose SRGB it is, and (b) use that node's SRGB to figure out what label to push beneath the labels that get you to the tunnel endpoint. I don't see how you can do this unless you know the address of the node to which you are tunneling, and unless you know that node's SRGB. If you're not trying to do something like this, there is no need for the Originator Sub-TLV. In this example, one could imagine that A, B, C have the same SRGB, and that there is a prefix covering the addresses of A, B, and C. In that case, it might make sense to advertise the Originator-SRGB in a route whose to the covering prefix. So I agree (now) that the prefix need not be a /32 or /128. Naturally, the originator SRGB sub-TLV is just one of several possible ways of allowing a node to advertise its SRGB. Another way for a node to advertise its SRGB would be to use the segment routing extensions of BGP-LS. However, there are scenarios in which BGP-LS is not present, but BGP-LU is in use. There's also a completely different way of figuring out the labels for the traffic engineered path, using the EPE extensions of BGP-LS. Those extensions allow a BGP speaker to advertise a (locally significant) adjacency-SID for each of its BGP neighbors. Since those labels are locally significant, you don't need to know the SRGBs of the transit nodes. But that's a different use case. > If you advertise an Originator SRGB, it implies that there nodes > with differing SRGBs in the BGP Routing Domain. If this is the case, > there is a very good chance that nodes receiving the Prefix-SID > Attribute with the Originator SRGB will not have the same SRGB and > will not have the Originator-SRGB[label-index] label available for > local allocation. Right. In the use case I described above, the Originator-SRGB of a particular node is used only to compute label values for the node whose SRGB it is. No one else uses it for local label allocation. > I can’t really see what different it makes whether or not it is a > host prefix or whether you can ascertain the node to which the SRGB > belongs. Please see the use case described above. > It seems that the key constraint is that the label-index and the SRGB > came from the same node and this is always the case. Now it's my turn to say that I don't understand the use case you have in mind ;-) If all you know is that the SRGB and the Prefix-SID sub-TLVs were created by the same node, I don't see what good it does you to know the SRGB. Eric From nobody Thu Nov 19 04:06:53 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id CE57C1ACE21; Thu, 19 Nov 2015 04:06:41 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -12.786 X-Spam-Level: X-Spam-Status: No, score=-12.786 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, MANGLED_DIET=2.3, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-0.585, SPF_PASS=-0.001, 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 ffnyRoOY3SFk; Thu, 19 Nov 2015 04:06:37 -0800 (PST) Received: from rcdn-iport-7.cisco.com (rcdn-iport-7.cisco.com [173.37.86.78]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id AC3221ACE28; Thu, 19 Nov 2015 04:06:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=6704; q=dns/txt; s=iport; t=1447934797; x=1449144397; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=QoAuTTWDxi21CiygwDWhId79mFfKu2aBi7MVbdHUc3I=; b=KcR1tiZqLz4mM3ri8PMbOipFevw+th78O0hc7wDfhxeUnTRJNFZaUXEA 2dLpPH124F75Xz6kiWONs7MgXqsnu0kGGfTdIO068nRuQ8bMSNhOx8OZK g4pbi3Xj8o2sRUgAMkswp8O0QOmHPCnfhWxuMSbtLEVv28JsosIakavqC M=; X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A0AMAgBIuk1W/5tdJa1egzuBQga+ZwENg?= =?us-ascii?q?WWGDwIcgSs4FAEBAQEBAQGBCoQ1AQEDASMRRRACAQgaAiYCAgIwFRACBAENBYg?= =?us-ascii?q?mCK8XkDMBAQEBAQEBAQEBAQEBAQEBAQEBGoEBilGEWRiDBIFEAQSWTAGIFIUZg?= =?us-ascii?q?VuEQI1YiFMBHwEBQoIRHYFWcoQZgQcBAQE?= X-IronPort-AV: E=Sophos;i="5.20,317,1444694400"; d="scan'208";a="46329574" Received: from rcdn-core-4.cisco.com ([173.37.93.155]) by rcdn-iport-7.cisco.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 19 Nov 2015 12:06:36 +0000 Received: from XCH-RTP-010.cisco.com (xch-rtp-010.cisco.com [64.101.220.150]) by rcdn-core-4.cisco.com (8.14.5/8.14.5) with ESMTP id tAJC6ac2009672 (version=TLSv1/SSLv3 cipher=AES256-SHA bits=256 verify=FAIL); Thu, 19 Nov 2015 12:06:36 GMT Received: from xch-rtp-015.cisco.com (64.101.220.155) by XCH-RTP-010.cisco.com (64.101.220.150) with Microsoft SMTP Server (TLS) id 15.0.1104.5; Thu, 19 Nov 2015 07:06:35 -0500 Received: from xch-rtp-015.cisco.com ([64.101.220.155]) by XCH-RTP-015.cisco.com ([64.101.220.155]) with mapi id 15.00.1104.000; Thu, 19 Nov 2015 07:06:35 -0500 From: "Acee Lindem (acee)" To: Eric C Rosen , "Stefano Previdi (sprevidi)" Thread-Topic: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 Thread-Index: AQHRGwJy6pvfTXZ/qE2W4H0FcAVzPZ6VrscAgAlploCAAR5eAIAAdkoAgAAK1wCAAB0egIAARDcAgAE3rICAAP6JAA== Date: Thu, 19 Nov 2015 12:06:35 +0000 Message-ID: References: <56294416.8030807@juniper.net> <5104A350-EA8D-4824-A396-1DC46140BA5D@cisco.com> <5640BA18.7060807@juniper.net> <5649EBC7.5000505@juniper.net> <7E84CCA4-1BF7-4D9C-A2AF-EC16877F7A90@cisco.com> <564B3F3A.3070808@juniper.net> <2F05F2A0-63BF-47EB-9E7B-7F722337FFF5@cisco.com> <564B60BF.2050705@juniper.net> <564C9F6B.8000802@juniper.net> In-Reply-To: <564C9F6B.8000802@juniper.net> 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: [10.116.152.196] Content-Type: text/plain; charset="utf-8" Content-ID: <2B2DF218FF643749B11E99AB25F0F5B3@emea.cisco.com> Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Cc: idr wg , SPRING WG Subject: Re: [spring] [Idr] Comments on draft-ietf-idr-bgp-prefix-sid-01 X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." 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ZXJlbnQgaXQgbWFrZXMgd2hldGhlciBvciBub3QgaXQgaXMgYQ0KPj4gaG9zdCBwcmVmaXggb3Ig d2hldGhlciB5b3UgY2FuIGFzY2VydGFpbiB0aGUgbm9kZSB0byB3aGljaCB0aGUgU1JHQg0KPj4g YmVsb25ncy4NCj4NCj5QbGVhc2Ugc2VlIHRoZSB1c2UgY2FzZSBkZXNjcmliZWQgYWJvdmUuDQo+ DQo+PiBJdCBzZWVtcyB0aGF0IHRoZSBrZXkgY29uc3RyYWludCBpcyB0aGF0IHRoZSBsYWJlbC1p bmRleCBhbmQgdGhlIFNSR0INCj4+IGNhbWUgZnJvbSB0aGUgc2FtZSBub2RlIGFuZCB0aGlzIGlz IGFsd2F5cyB0aGUgY2FzZS4NCj4NCj5Ob3cgaXQncyBteSB0dXJuIHRvIHNheSB0aGF0IEkgZG9u J3QgdW5kZXJzdGFuZCB0aGUgdXNlIGNhc2UgeW91IGhhdmUgaW4NCj5taW5kIDstKSAgSWYgYWxs IHlvdSBrbm93IGlzIHRoYXQgdGhlIFNSR0IgYW5kIHRoZSBQcmVmaXgtU0lEIHN1Yi1UTFZzDQo+ d2VyZSBjcmVhdGVkIGJ5IHRoZSBzYW1lIG5vZGUsIEkgZG9uJ3Qgc2VlIHdoYXQgZ29vZCBpdCBk b2VzIHlvdSB0byBrbm93DQo+dGhlIFNSR0IuDQoNCg0KDQo+DQo+RXJpYw0KPg0KPg0KDQo= From nobody Thu Nov 19 08:13:55 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 540841A6FE0 for ; Thu, 19 Nov 2015 08:13:53 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.484 X-Spam-Level: X-Spam-Status: No, score=-2.484 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FROM=0.001, RP_MATCHES_RCVD=-0.585, SPF_PASS=-0.001, UNPARSEABLE_RELAY=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 n_DZEZlmLOFN for ; Thu, 19 Nov 2015 08:13:51 -0800 (PST) Received: from relais-inet.orange.com (relais-nor34.orange.com [80.12.70.34]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 0EAA01B2C2F for ; Thu, 19 Nov 2015 08:13:41 -0800 (PST) Received: from opfednr02.francetelecom.fr (unknown [xx.xx.xx.66]) by opfednr21.francetelecom.fr (ESMTP service) with ESMTP id 5F76DC03A1 for ; Thu, 19 Nov 2015 17:13:39 +0100 (CET) Received: from Exchangemail-eme2.itn.ftgroup (unknown [xx.xx.31.41]) by opfednr02.francetelecom.fr (ESMTP service) with ESMTP id 38F1A120063 for ; Thu, 19 Nov 2015 17:13:39 +0100 (CET) Received: from OPEXCLILM21.corporate.adroot.infra.ftgroup ([fe80::e92a:c932:907e:8f06]) by OPEXCLILM31.corporate.adroot.infra.ftgroup ([fe80::2cc9:4bac:7b7d:229d%19]) with mapi id 14.03.0248.002; Thu, 19 Nov 2015 17:13:38 +0100 From: To: "spring@ietf.org" Thread-Topic: SPRING Wiki Thread-Index: AdEi5BZV9y9nlJeyR1W+WltDCM+nTw== Date: Thu, 19 Nov 2015 16:13:38 +0000 Message-ID: <4430_1447949619_564DF533_4430_4619_1_53C29892C857584299CBF5D05346208A0F6C1D33@OPEXCLILM21.corporate.adroot.infra.ftgroup> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.168.234.3] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Archived-At: Subject: [spring] SPRING Wiki X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Nov 2015 16:13:53 -0000 Hi all, As discussed in Yokohama, the SPRING wiki has been initiated: http://tools.= ietf.org/wg/spring/trac/wiki It currently has 2 mains sections: - SPRING related drafts in others IETF WG - Implementation reports. A very drafty implementation report of "Segment Routing" and "LDP Interwork= ing" has been initiated based on the EANTC Interop tests (Thanks Roberta). Please feel free to update. Thanks, Bruno ___________________________________________________________________________= ______________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confiden= tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu= ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el= ectroniques etant susceptibles d'alteration, France Telecom - Orange decline toute responsabilite si ce message a ete al= tere, deforme ou falsifie. Merci This message and its attachments may contain confidential or privileged inf= ormation that may be protected by law; they should not be distributed, used or copied without authorization. If you have received this email in error, please notify the sender and dele= te this message and its attachments. As emails may be altered, France Telecom - Orange shall not be liable if th= is message was modified, changed or falsified. Thank you. From nobody Thu Nov 19 08:50:39 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 8779A1B2C97 for ; Thu, 19 Nov 2015 08:50:37 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.599 X-Spam-Level: X-Spam-Status: No, score=-2.599 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, UNPARSEABLE_RELAY=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 YCyCfnIuyJPr for ; Thu, 19 Nov 2015 08:50:34 -0800 (PST) Received: from relais-inet.francetelecom.com (relais-ias91.francetelecom.com [193.251.215.91]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 838BE1B2C9C for ; Thu, 19 Nov 2015 08:50:33 -0800 (PST) Received: from omfedm07.si.francetelecom.fr (unknown [xx.xx.xx.3]) by omfedm10.si.francetelecom.fr (ESMTP service) with ESMTP id C6BB6264446; Thu, 19 Nov 2015 17:50:31 +0100 (CET) Received: from Exchangemail-eme2.itn.ftgroup (unknown [10.114.31.75]) by omfedm07.si.francetelecom.fr (ESMTP service) with ESMTP id A49404C05D; Thu, 19 Nov 2015 17:50:31 +0100 (CET) Received: from OPEXCLILM21.corporate.adroot.infra.ftgroup ([fe80::e92a:c932:907e:8f06]) by OPEXCLILMA4.corporate.adroot.infra.ftgroup ([fe80::65de:2f08:41e6:ebbe%19]) with mapi id 14.03.0248.002; Thu, 19 Nov 2015 17:50:31 +0100 From: To: "Ahmed Bashandy (bashandy)" , "Les Ginsberg (ginsberg)" , Chris Bowers Thread-Topic: [spring] New Version Notification for draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt Thread-Index: AQHQ/6CxHQ8/5U5LHEGhv25qi8GIjJ5dQkDggCwZhxCACzixAIAPPD8Q Date: Thu, 19 Nov 2015 16:50:31 +0000 Message-ID: <21598_1447951831_564DFDD7_21598_448_1_53C29892C857584299CBF5D05346208A0F6C1DBC@OPEXCLILM21.corporate.adroot.infra.ftgroup> References: <20151005190437.7637.79353.idtracker@ietfa.amsl.com> <56414016.1050109@cisco.com> In-Reply-To: <56414016.1050109@cisco.com> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.168.234.3] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-PMX-Version: 6.2.1.2478543, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2015.11.16.111515 Archived-At: Cc: "spring@ietf.org" Subject: Re: [spring] New Version Notification for draft-bowers-spring-adv-per-algorithm-label-blocks-02.txt X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Nov 2015 16:50:37 -0000 Hi all, As a network operator, please see my 2cents inline [Bruno] > From: Ahmed Bashandy (bashandy) > Sent: Tuesday, November 10, 2015 1:54 AM >=20 > Thanks a lot Les for the elaborate explanation >=20 > One small addition to what Les mentioned. The functionality proposed by > the draft can be achieved by having a base prefix-SID index and then > configuring an offset (instead of an SRGB) for each topology/algorithm > pair from that base prefix-SID index value. Based on the configured > offset, the router would then calculate the corresponding prefix-SID > index for each topology/algorithm pair and advertise it using existing > mechanisms [Bruno] This is correct. However, IMO this is a drawback to have: a) the network operator configure a specific value (offset) attached to a s= pecific item (algo/topology) b) the protocol (and hence the logs/show/dumps...) advertise a different va= lue (SID+offset) attached to a different item (prefix) I fear that this would not help the troubleshooting, in particular in diffi= cult situations (e.g. significant network issue, with significant pressure = and possibly with non-expert people involved. e.g. "I know why this does no= t work: the offset configured is not advertised" or "The SID advertised doe= s not match the configured one" ...) So I don't feel that the "offset" proposal is fully equivalent. Thanks -- Bruno=20=20 > Note that the above is NOT a suggestion to use the offset mechanism to > configure prefix-SID indices. The objective is to show that the draft > does not offer enough benefits to warrant all the questions marks that > are outlined in Les's email. >=20 > Thanks >=20 > Ahmed >=20 > On 11/9/2015 1:11 AM, Les Ginsberg (ginsberg) wrote: > > Chris - > > > > I have a number of questions - but in order to properly frame them I ne= ed > to recount some history - please bear with me. > > > > In the very early days of SR there was a proposal to reserve a fixed la= bel > range on all routers (16000 - 23999) for the use of SR. This seemed worka= ble > but there was concern that the same range would not be available on all > routers so the SR community agreed that we needed to allow the > advertisement of a different SRGB range on each SR capable router. > > > > Then, another concern was raised that a single contiguous range large > enough to meet the SR requirements might not be available on all routers = and > therefore we needed to support the advertisement of multiple SRGB ranges > from a given node. This capability has been added - though it has also ra= ised > other concerns regarding how many ranges might be enough and how to deal > with inconsistencies (overlaps) in the advertised ranges should some error > occur. > > > > Now, in support of multiple algorithms/topologies, this draft proposes = that > algorithm/topology specific SRGBs be advertised - and that to fully get t= he > benefits of consistent SID assignment for the same prefix across > algorithms/topologies (the major goal of this draft) that all routers be = able to > support identical ranges for each algorithm/topology. (Section 5 goes int= o this > in detail) - and to be able to allocate new ranges for newly configured > algorithms/topologies on demand. Section 6 goes on to suggest that it wo= uld > be a wonderful goal if all routers could assign the same base label/range= to > each algorithm/topology so that the labels could be derived algorithmical= ly > (though you admit this may not always be possible). > > > > My first question is how do you reconcile this requirement for consiste= ncy > on all nodes with the earlier decisions to support inconsistency as regar= ds > SRGB base values/range sizes? > > > > My second question is associated with the assumption of a single > "node_index" per node. I for one would be delighted if we could get > agreement on using a single host address/node (or at least one per AF) fo= r all > traffic to that node. But this does not meet the deployment requirements = in > all cases and so we support multiple "node_indeces" for a given node. This > means that we do not map SIDs to nodes - we map SIDs to prefixes. So it is > conceptually more straightforward and less problematic to configure SIDs = for > prefix ranges. This is in fact how SRMS advertisements are constructed i.= e. > > > > (Prefix/Prefix length, Starting SID, Range) > > > > How would you propose to incorporate this style of SID assignment into = your > algorithms? Do you assume a maximum number of node-sids required for > every node in the network and require the range for each algorithm/topolo= gy > be sized large enough for the worst case? This seems potentially wasteful= - > especially if a deployment chooses to use a particular address for a topo= logy > as a traffic differentiator. > > > > My third question relates to the algorithm/topology independence of the > SID assignment that you propose. Throughout the document you assume that > you have a single SID for a given prefix and you simply add the appropria= te > algorithm/topology specific SRGB base value to this SID to derive the > forwarding label. However, current protocol advertisements for SIDs inclu= de > both algorithm and topology as context for the SID. This reflects the cur= rent > SR architecture which has been defined with algorithm/topology as an expl= icit > context for a SID. Your proposal fundamentally changes this and therefore= all > existing encodings of SID advertisements (prefix reachability, SRGB, SRMS > advertisements) would have to be changed in a non-backwards compatible > way in order to support your proposal. Other than definition of a new SR= GB > advertisement, you do not discuss this in the draft. How do you intend to > address this major issue? > > > > Les > > > > > >> -----Original Message----- > >> From: spring [mailto:spring-bounces@ietf.org] On Behalf Of Chris Bowers > >> Sent: Monday, October 05, 2015 12:31 PM > >> To: spring@ietf.org > >> Subject: [spring] FW: New Version Notification for draft-bowers-spring- > adv- > >> per-algorithm-label-blocks-02.txt > >> > >> SPRING WG, > >> > >> There was quite a lot of discussion in person after we presented draft- > >> bowers-spring-adv-per-algorithm-label-blocks-01 in Prague, and there w= as > >> also much discussion on this list about the issue raised by this draft= . We > have > >> made two main additions to this revision of the draft to further this > >> discussion. > >> > >> 1) We have included discussion of multiple topologies in addition to > multiple > >> algorithms, and we have modified the proposed ISIS extension to handle > >> both multiple topologies and multiple algorithms. > >> > >> 2) We have tried to accurately describe a proposal, which was outlined= on > >> this list, for managing the assignment of per-topology/per-algorithm n= ode > >> index values, which we refer to as the "configured offset mapping > method". > >> > >> We welcome feedback from the working group on this draft. > >> > >> Thanks, > >> Chris > >> > >> -----Original Message----- > >> From: internet-drafts@ietf.org [mailto:internet-drafts@ietf.org] > >> Sent: Monday, October 05, 2015 2:05 PM > >> To: Uma Chunduri ; Hannes Gredler > >> ; Pushpasis Sarkar ; Chris > >> Bowers ; Chris Bowers ; > >> Uma Chunduri ; Pushpasis Sarkar > >> ; Hannes Gredler > >> Subject: New Version Notification for draft-bowers-spring-adv-per- > >> algorithm-label-blocks-02.txt > >> > >> > >> A new version of I-D, draft-bowers-spring-adv-per-algorithm-label-bloc= ks- > >> 02.txt > >> has been successfully submitted by Chris Bowers and posted to the IETF > >> repository. > >> > >> Name: draft-bowers-spring-adv-per-algorithm-label-blocks > >> Revision: 02 > >> Title: Advertising Per-Topology and Per-Algorithm Label > Blocks > >> Document date: 2015-10-05 > >> Group: Individual Submission > >> Pages: 14 > >> URL: https://www.ietf.org/internet-drafts/draft-bowers-spri= ng-adv- > >> per-algorithm-label-blocks-02.txt > >> Status: https://datatracker.ietf.org/doc/draft-bowers-spring-a= dv-per- > >> algorithm-label-blocks/ > >> Htmlized: https://tools.ietf.org/html/draft-bowers-spring-adv-pe= r- > >> algorithm-label-blocks-02 > >> Diff: https://www.ietf.org/rfcdiff?url2=3Ddraft-bowers-sprin= g-adv-per- > >> algorithm-label-blocks-02 > >> > >> Abstract: > >> When segment routing is used in a network that is controlled by a > >> link state IGP (such as ISIS or OSPF), each node in the network can > >> be assigned one or more index numbers, known as "node-SIDs". The > >> node-SIDs are unique within the network, and are known to all the > >> nodes in the network. If an ingress node has a data packet to be > >> sent to an egress node, the ingress node may select a node-SID > >> corresponding to the egress node, and "translate" that node-SID to= an > >> MPLS label. The MPLS label represents a particular path to the > >> egress node; the path is determined by applying a routing algorithm > >> to a particular view of the network topology and a particular set = of > >> metric assignments to the links of that topology. The packet can > >> then be forwarded by pushing the label on the packet's label stack > >> and transmitting the packet to the next hop on the corresponding p= ath > >> to the egress node. This document compares two different procedur= es > >> for translating a node-SID to the MPLS label that represents a path > >> chosen by a particular algorithm operating on a particular topolog= y. > >> It also specifies the ISIS extensions needed to support one of the > >> procedures (known as the "per-topology/per-algorithm label block" > >> procedure). > >> > >> > >> > >> > >> 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 > >> > >> _______________________________________________ > >> spring mailing list > >> spring@ietf.org > >> https://www.ietf.org/mailman/listinfo/spring > > _______________________________________________ > > spring mailing list > > spring@ietf.org > > https://www.ietf.org/mailman/listinfo/spring >=20 >=20 > _______________________________________________ > spring mailing list > spring@ietf.org > https://www.ietf.org/mailman/listinfo/spring ___________________________________________________________________________= ______________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confiden= tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu= ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el= ectroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou = falsifie. Merci. This message and its attachments may contain confidential or privileged inf= ormation that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and dele= te this message and its attachments. As emails may be altered, Orange is not liable for messages that have been = modified, changed or falsified. Thank you. From nobody Fri Nov 20 07:11:15 2015 Return-Path: X-Original-To: spring@ietfa.amsl.com Delivered-To: spring@ietfa.amsl.com Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 62E651B324C for ; Fri, 20 Nov 2015 07:11:13 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -2.588 X-Spam-Level: X-Spam-Status: No, score=-2.588 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_PASS=-0.001, T_HTML_ATTACH=0.01, UNPARSEABLE_RELAY=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 xZwelc9z457b for ; Fri, 20 Nov 2015 07:11:04 -0800 (PST) Received: from relais-inet.francetelecom.com (relais-ias92.francetelecom.com [193.251.215.92]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 9BAE31B3245 for ; Fri, 20 Nov 2015 07:11:03 -0800 (PST) Received: from omfedm05.si.francetelecom.fr (unknown [xx.xx.xx.1]) by omfedm12.si.francetelecom.fr (ESMTP service) with ESMTP id D9CD918C5DE; Fri, 20 Nov 2015 16:11:01 +0100 (CET) Received: from Exchangemail-eme2.itn.ftgroup (unknown [10.114.31.24]) by omfedm05.si.francetelecom.fr (ESMTP service) with ESMTP id AEF3235C078; Fri, 20 Nov 2015 16:11:01 +0100 (CET) Received: from OPEXCLILM21.corporate.adroot.infra.ftgroup ([fe80::e92a:c932:907e:8f06]) by OPEXCLILM7D.corporate.adroot.infra.ftgroup ([fe80::9044:c5ee:4dd2:4f16%19]) with mapi id 14.03.0248.002; Fri, 20 Nov 2015 16:11:01 +0100 From: To: "spring@ietf.org" , "Henderickx, Wim (Wim)" , "Les Ginsberg (ginsberg)" Thread-Topic: Minutes Thread-Index: AdEX40rQtk4jyuO+T8yR9qVu3jJg7gLtVyrw Date: Fri, 20 Nov 2015 15:11:00 +0000 Message-ID: <30549_1448032261_564F3805_30549_293_1_53C29892C857584299CBF5D05346208A0F6C3873@OPEXCLILM21.corporate.adroot.infra.ftgroup> References: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> In-Reply-To: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.168.234.3] Content-Type: multipart/mixed; boundary="_002_53C29892C857584299CBF5D05346208A0F6C3873OPEXCLILM21corp_" MIME-Version: 1.0 X-PMX-Version: 6.2.1.2478543, Antispam-Engine: 2.7.2.2107409, Antispam-Data: 2015.10.16.122716 Archived-At: Subject: Re: [spring] Minutes X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 Nov 2015 15:11:13 -0000 --_002_53C29892C857584299CBF5D05346208A0F6C3873OPEXCLILM21corp_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi Folks, Minutes have been slightly updated following some comments and after review= ing the video. Please find enclosed the diff for review. In particular, Wim, Les, could you please review the change related to the = discussion on SID conflict resolution? Wim, if you need the audio, your comment start at: http://recs.conf.meetech= o.com/Playout/watch.jsp?recording=3DIETF94_SPRING&chapter=3Dchapter_1&t=3D2= 905 Thanks, -- Bruno > From: bruno.decraene@orange.com > Sent: Thursday, November 05, 2015 5:06 PM >=20 > Hi Folks, >=20 > The minutes have been posted. > Thanks to Jon Mitchell and Ignas Bagdonas for taking them. >=20 > https://www.ietf.org/proceedings/94/minutes/minutes-94-spring >=20 > Please review for any errors. >=20 > Thanks, > Bruno. ___________________________________________________________________________= ______________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confiden= tielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu= ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages el= ectroniques etant susceptibles d'alteration, Orange decline toute responsabilite si ce message a ete altere, deforme ou = falsifie. Merci. This message and its attachments may contain confidential or privileged inf= ormation that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and dele= te this message and its attachments. As emails may be altered, Orange is not liable for messages that have been = modified, changed or falsified. 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[127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 644681B4307 for ; Sat, 21 Nov 2015 01:57:42 -0800 (PST) X-Virus-Scanned: amavisd-new at amsl.com X-Spam-Flag: NO X-Spam-Score: -7.486 X-Spam-Level: X-Spam-Status: No, score=-7.486 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_HI=-5, RP_MATCHES_RCVD=-0.585, 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 yowf6YKfz-0P for ; Sat, 21 Nov 2015 01:57:40 -0800 (PST) Received: from smtp-fr.alcatel-lucent.com (fr-hpida-esg-02.alcatel-lucent.com [135.245.210.21]) (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 7F1981B4305 for ; Sat, 21 Nov 2015 01:57:40 -0800 (PST) Received: from fr712usmtp2.zeu.alcatel-lucent.com (unknown [135.239.2.42]) by Websense Email Security Gateway with ESMTPS id A59DBCBB8D694; Sat, 21 Nov 2015 09:57:36 +0000 (GMT) Received: from FR712WXCHHUB03.zeu.alcatel-lucent.com (fr712wxchhub03.zeu.alcatel-lucent.com [135.239.2.74]) by fr712usmtp2.zeu.alcatel-lucent.com (GMO) with ESMTP id tAL9vcr2009054 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Sat, 21 Nov 2015 10:57:38 +0100 Received: from FR711WXCHMBA07.zeu.alcatel-lucent.com ([169.254.3.17]) by FR712WXCHHUB03.zeu.alcatel-lucent.com ([135.239.2.74]) with mapi id 14.03.0195.001; Sat, 21 Nov 2015 10:57:38 +0100 From: "Henderickx, Wim (Wim)" To: "bruno.decraene@orange.com" , "spring@ietf.org" , "Les Ginsberg (ginsberg)" Thread-Topic: Minutes Thread-Index: AdEX40rQtk4jyuO+T8yR9qVu3jJg7gLtVyrwABe9aIA= Date: Sat, 21 Nov 2015 09:57:37 +0000 Message-ID: <1B4EBF34-E49E-4CB0-9287-0C80DD9A1ABE@alcatel-lucent.com> References: <15883_1446739533_563B7E4D_15883_2399_1_53C29892C857584299CBF5D05346208A0F6AAD47@OPEXCLILM21.corporate.adroot.infra.ftgroup> <30549_1448032261_564F3805_30549_293_1_53C29892C857584299CBF5D05346208A0F6C3873@OPEXCLILM21.corporate.adroot.infra.ftgroup> In-Reply-To: <30549_1448032261_564F3805_30549_293_1_53C29892C857584299CBF5D05346208A0F6C3873@OPEXCLILM21.corporate.adroot.infra.ftgroup> Accept-Language: nl-BE, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/0.0.0.151008 x-originating-ip: [135.239.27.41] Content-Type: text/plain; charset="utf-8" Content-ID: Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: Re: [spring] Minutes X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." 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charset="utf-8" Content-Transfer-Encoding: base64 MIME-Version: 1.0 Archived-At: Subject: Re: [spring] Minutes X-BeenThere: spring@ietf.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Stacked Tunnels for Source Routing \(STATUS\)." 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