IETF Logo Mail Archive

Re: [Lsr] [spring] FlexAlgo and Global Adj-SIDs

"Les Ginsberg (ginsberg)" <ginsberg@cisco.com> Tue, 05 March 2019 16:37 UTC

Return-Path: <ginsberg@cisco.com>
X-Original-To: lsr@ietfa.amsl.com
Delivered-To: lsr@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 41EB71200D8; Tue, 5 Mar 2019 08:37:41 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -14.502
X-Spam-Level:
X-Spam-Status: No, score=-14.502 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, USER_IN_DEF_DKIM_WL=-7.5] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=cisco.com header.b=VPIdZG5r; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=VfjvBpHh
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 6-bC6J_NbuGv; Tue, 5 Mar 2019 08:37:39 -0800 (PST)
Received: from rcdn-iport-4.cisco.com (rcdn-iport-4.cisco.com [173.37.86.75]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id EAF28128B36; Tue, 5 Mar 2019 08:37:28 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=2023; q=dns/txt; s=iport; t=1551803849; x=1553013449; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=I2cGn5tdJHdxET8c9YsRtic6bbnSzJkDpbxPSsJBwiY=; b=VPIdZG5rqivvl1YNgy550DT91GZyT9553jrGaf1EEqRuzpqise0sZJxk 5eIO1vS9vrnP/iohrJYJi9AuOKCYH+JT8OsbF8UHS8vqgjoEOAo3nxF3M HNT8WIXNebdOihawOG5a0YSx91MjCoFxCBGG5JfyMsVbkd6vWzrFqbcn9 o=;
IronPort-PHdr: 9a23:SDKslR/iPKQFP/9uRHGN82YQeigqvan1NQcJ650hzqhDabmn44+8ZR7E/fs4iljPUM2b8P9Ch+fM+4HYEW0bqdfk0jgZdYBUERoMiMEYhQslVcGED1bxIeTlRyc7B89FElRi+iLzPA==
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: A0ADAAAcpX5c/5NdJa1kGQEBAQEBAQEBAQEBAQcBAQEBAQGBUQQBAQEBAQsBgTwkLAOBXAQLJ4dPA4RQiwCCV5ghFIEQA1QLAQEshEAChCwiNAkNAQEDAQEDAQMCbRwMhUoBAQEEOgYBATcBCwICAgEIEQQBAQEeEBYcHQgBAQQBDQUIhHgDFQECn1MCihSCIIJ4AQEFhQYYggsIBYEqAYsnF4FAP4EQR4JMhE4BEgEhBR+DFYImihOZdgkCkwuTJ4plkiYCBAIEBQINAQEFgUc4ZXFwFYMnggoMF4NLilNygSiNL4I+AQE
X-IronPort-AV: E=Sophos;i="5.58,444,1544486400"; d="scan'208";a="529342613"
Received: from rcdn-core-11.cisco.com ([173.37.93.147]) by rcdn-iport-4.cisco.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Mar 2019 16:37:27 +0000
Received: from XCH-RCD-015.cisco.com (xch-rcd-015.cisco.com [173.37.102.25]) by rcdn-core-11.cisco.com (8.15.2/8.15.2) with ESMTPS id x25GbRH7018258 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=FAIL); Tue, 5 Mar 2019 16:37:27 GMT
Received: from xhs-rtp-002.cisco.com (64.101.210.229) by XCH-RCD-015.cisco.com (173.37.102.25) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 5 Mar 2019 10:37:26 -0600
Received: from xhs-rtp-002.cisco.com (64.101.210.229) by xhs-rtp-002.cisco.com (64.101.210.229) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 5 Mar 2019 11:37:26 -0500
Received: from NAM01-SN1-obe.outbound.protection.outlook.com (64.101.32.56) by xhs-rtp-002.cisco.com (64.101.210.229) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Tue, 5 Mar 2019 11:37:25 -0500
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cisco.onmicrosoft.com; s=selector1-cisco-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=WH1U9z36nYRWJtCSbYrGLDWtafnONUnkTbXQgR39gwU=; b=VfjvBpHhR+MNgtDgHQ9DawlLfKDVSydYPqzR0w2s9NkFhRBmHYh/UyeIU0UGe+56lPerB6yRUivefyT5UvVGA7fMQqENGHXtfisP/AQ5lD9TkjsDoDmmhOw5swunwddUJp7gKcOaJm5k/ydAoloYfAer4aMCZ0mBOXTCkgESpIE=
Received: from BYAPR11MB3638.namprd11.prod.outlook.com (20.178.237.19) by BYAPR11MB2725.namprd11.prod.outlook.com (52.135.227.155) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1665.16; Tue, 5 Mar 2019 16:37:24 +0000
Received: from BYAPR11MB3638.namprd11.prod.outlook.com ([fe80::b414:f534:f20a:a26d]) by BYAPR11MB3638.namprd11.prod.outlook.com ([fe80::b414:f534:f20a:a26d%3]) with mapi id 15.20.1686.016; Tue, 5 Mar 2019 16:37:24 +0000
From: "Les Ginsberg (ginsberg)" <ginsberg@cisco.com>
To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>, "Peter Psenak (ppsenak)" <ppsenak@cisco.com>
CC: "lsr@ietf.org" <lsr@ietf.org>, "spring@ietf.org" <spring@ietf.org>, "draft-ietf-isis-segment-routing-extensions.all@ietf.org" <draft-ietf-isis-segment-routing-extensions.all@ietf.org>
Thread-Topic: [spring] FlexAlgo and Global Adj-SIDs
Thread-Index: AdTPjdP9QRfJ5GzARfmqN1/BpEhW0gAEem2AAGBozJQAkaz8AAABfrsgAAC21FA=
Date: Tue, 05 Mar 2019 16:37:24 +0000
Message-ID: <BYAPR11MB3638BD5F65B898D225A8DAC9C1720@BYAPR11MB3638.namprd11.prod.outlook.com>
References: <AM6PR03MB38302990EFFB7482B5C7F55F9D750@AM6PR03MB3830.eurprd03.prod.outlook.com> <20493a62-cf70-a182-900d-e55dd68f5149@cisco.com> <AM0PR03MB38286EFCFC0357EDB1D782679D770@AM0PR03MB3828.eurprd03.prod.outlook.com> <fc1b73eb-d57f-22f5-26c4-ecea60d2c2e3@cisco.com> <VI1PR03MB3839ED3D9E2E1D825F22164D9D720@VI1PR03MB3839.eurprd03.prod.outlook.com>
In-Reply-To: <VI1PR03MB3839ED3D9E2E1D825F22164D9D720@VI1PR03MB3839.eurprd03.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: spf=none (sender IP is ) smtp.mailfrom=ginsberg@cisco.com;
x-originating-ip: [2001:420:30d:1320:a988:c680:96ce:e179]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: 360332f1-7c8b-40d6-60f8-08d6a188d8c6
x-microsoft-antispam: BCL:0; PCL:0; RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600127)(711020)(4605104)(2017052603328)(7153060)(7193020); SRVR:BYAPR11MB2725;
x-ms-traffictypediagnostic: BYAPR11MB2725:
x-ld-processed: 5ae1af62-9505-4097-a69a-c1553ef7840e,ExtAddr
x-microsoft-exchange-diagnostics: 1; BYAPR11MB2725; 23: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
x-microsoft-antispam-prvs: <BYAPR11MB2725CEEB34ABE30FAF3314ABC1720@BYAPR11MB2725.namprd11.prod.outlook.com>
x-forefront-prvs: 0967749BC1
x-forefront-antispam-report: SFV:NSPM; SFS:(10009020)(346002)(376002)(366004)(136003)(39860400002)(396003)(13464003)(199004)(189003)(51874003)(86362001)(71190400001)(71200400001)(106356001)(8936002)(55016002)(105586002)(186003)(33656002)(53936002)(11346002)(446003)(6436002)(97736004)(486006)(229853002)(99286004)(93886005)(52536013)(6246003)(14454004)(46003)(476003)(8676002)(81166006)(81156014)(6636002)(256004)(6506007)(110136005)(9686003)(5660300002)(53546011)(68736007)(54906003)(316002)(102836004)(74316002)(76176011)(4326008)(305945005)(7736002)(6116002)(2906002)(7696005)(25786009)(478600001); DIR:OUT; SFP:1101; SCL:1; SRVR:BYAPR11MB2725; H:BYAPR11MB3638.namprd11.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; A:1; MX:1;
received-spf: None (protection.outlook.com: cisco.com does not designate permitted sender hosts)
x-ms-exchange-senderadcheck: 1
x-microsoft-antispam-message-info: eHROPh4AFnvDdGcRmbVDaTxgCui7zFlHhgNrOpFrBo9ZZXZWXrQm4N7zCLxHSLv/KCAU9fegrK/fe1FToQs7cXW4L3ndLfldZJ9+yVVdav24B6ke38sjc37IrKQSa+GCF9ZGSz3Hd0FktdmyLjgYXmUeUn3V0+Tz66ihVxeow8wWSpIqlmrEivEaZ5NSvdcaHBjAcff1MtZHub7NoGAQTdDDeScuHiafKKoP6gbJPogqM/rt2otdsyNgcrKDYMEL8JHD1OJ11lykNt85RsHyFX7flJlJjgAMcDQDjcZ/FlmTah9HhuF5+LiiofsqAHpnvVRzYifk47qhyP5CP7saQeQHrhzUae1ewue1n0oliMqeLw6rFXufRjpcnZOiyzejicyCwJX/K75BGrmBgjUwDtoj0eGv4p6W6vMHlqaDzuo=
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: 360332f1-7c8b-40d6-60f8-08d6a188d8c6
X-MS-Exchange-CrossTenant-originalarrivaltime: 05 Mar 2019 16:37:24.2656 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 5ae1af62-9505-4097-a69a-c1553ef7840e
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB2725
X-OriginatorOrg: cisco.com
X-Outbound-SMTP-Client: 173.37.102.25, xch-rcd-015.cisco.com
X-Outbound-Node: rcdn-core-11.cisco.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/lsr/DFYEND5tMJbAW4cRjVjcmnM4_Hc>
Subject: Re: [Lsr] [spring] FlexAlgo and Global Adj-SIDs
X-BeenThere: lsr@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Link State Routing Working Group <lsr.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/lsr>, <mailto:lsr-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/lsr/>
List-Post: <mailto:lsr@ietf.org>
List-Help: <mailto:lsr-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/lsr>, <mailto:lsr-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 05 Mar 2019 16:37:41 -0000

Sasha -

draft-ietf-isis-segment-routing-extensions is currently in AD review - and the companion OSPF document has already been approved and is waiting for a dependent draft to progress before publication as an RFC.

It is too late to make significant changes.

Further, while I agree with both your description and Peter's response, agreeing that this "could" be done is not equivalent to having consensus that it "should" be done.
I think a more complete consideration of the deployment cases and the usefulness of such an extension should be discussed by the WG before we decide that we actually want to define such an extension.

  Les


> -----Original Message-----
> From: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
> Sent: Tuesday, March 05, 2019 8:29 AM
> To: Peter Psenak (ppsenak) <ppsenak@cisco.com>
> Cc: lsr@ietf.org; spring@ietf.org; draft-ietf-isis-segment-routing-
> extensions.all@ietf.org
> Subject: RE: [spring] FlexAlgo and Global Adj-SIDs
> 
> Peter,
> Lots of thanks for a prompt and very encouraging response.
> 
> Do you think that the new Algo specific Adj-SID sub-TLV could be added to
> the current IS-IS segment Routing Extensions draft, or should be handled in a
> small dedicated document?
> 
> Regards, and lots of thanks in advance,
> Sasha
> 
> Office: +972-39266302
> Cell:      +972-549266302
> Email:   Alexander.Vainshtein@ecitele.com
> 
> -----Original Message-----
> From: Peter Psenak <ppsenak@cisco.com>
> Sent: Tuesday, March 5, 2019 5:28 PM
> To: Alexander Vainshtein <Alexander.Vainshtein@ecitele.com>
> Cc: lsr@ietf.org; spring@ietf.org; draft-ietf-isis-segment-routing-
> extensions.all@ietf.org
> Subject: Re: [spring] FlexAlgo and Global Adj-SIDs
> 
> Hi Sasha,
> 
> On 02/03/2019 18:57 , Alexander Vainshtein wrote:
> > Peter,
> > Lots of thanks for a prompt and hivhly informative response.
> >
> > It seems that per-FlexAlgo Adj-SIDs can be useful even if they are local

v2.23.0 | Report a Bug | By Email