IETF Logo Mail Archive

Re: [Idr] Does SRGB TLV in draft-ietf-idr-bgp-prefix-sid qualify for BGP Attibute discard?

Eric C Rosen <erosen@juniper.net> Tue, 26 June 2018 19:07 UTC

Return-Path: <erosen@juniper.net>
X-Original-To: idr@ietfa.amsl.com
Delivered-To: idr@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id B54C9131102 for <idr@ietfa.amsl.com>; Tue, 26 Jun 2018 12:07:12 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.7
X-Spam-Level:
X-Spam-Status: No, score=-2.7 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_LOW=-0.7, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=juniper.net
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 kuX-oh1TgTPG for <idr@ietfa.amsl.com>; Tue, 26 Jun 2018 12:07:09 -0700 (PDT)
Received: from mx0b-00273201.pphosted.com (mx0b-00273201.pphosted.com [67.231.152.164]) (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 C1C4F130E1E for <idr@ietf.org>; Tue, 26 Jun 2018 12:07:09 -0700 (PDT)
Received: from pps.filterd (m0108162.ppops.net [127.0.0.1]) by mx0b-00273201.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w5QJ4CXB025408; Tue, 26 Jun 2018 12:07:07 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=juniper.net; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type; s=PPS1017; bh=8HTH1NYvAIqekfNHQk7T2x3aKvje8pCuztanCT9uSPY=; b=C6W8aszAaYkxLFYLwOGnD+oixu9BsazKpW7syW7wa2yQPqvmdaSt/prSBiogjAF7b76W qDtZrH0MnSWx7zHpiopcV+jTpCKSZTnWX652lz/8Y3dr1fRaqmopBgsZcPz1/RdXfYXq QyoORJcBhEU6jfHYwX3sJLBtdcH9hJWwI3ijUlSYtCbf5IsmikmCMNfCI9LUHXZ3nGWy HGaU1dYyteQYlEOGHQvJHIv9qPNoRHECfTw61wT64pv8IiN8QvsR6q2l6i3h/j1ywRud sYxrAvcEn6hpCeVAtBX/LNNuq0JyR5G3Dn7e+1v7K/BWthImu3IoIJRkqGBCHZdthm7O rQ==
Received: from nam04-bn3-obe.outbound.protection.outlook.com (mail-bn3nam04lp0119.outbound.protection.outlook.com [216.32.180.119]) by mx0b-00273201.pphosted.com with ESMTP id 2juqxarcy5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Tue, 26 Jun 2018 12:07:07 -0700
Received: from [172.29.33.16] (66.129.241.10) by DM5PR0501MB3863.namprd05.prod.outlook.com (2603:10b6:4:7b::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.906.18; Tue, 26 Jun 2018 19:07:05 +0000
To: Susan Hares <shares@ndzh.com>, "'Ketan Talaulikar (ketant)'" <ketant@cisco.com>, 'Robert Raszuk' <robert@raszuk.net>
Cc: "'idr@ietf. org'" <idr@ietf.org>
References: <00f001d40d68$c4881700$4d984500$@ndzh.com> <ce748a79-10bd-7cce-e7c2-c3878f4bbcbf@juniper.net> <020601d40d7d$20f00160$62d00420$@ndzh.com>
From: Eric C Rosen <erosen@juniper.net>
Message-ID: <d2e42ff7-2c93-cfa7-d4e1-cb4ae929c66f@juniper.net>
Date: Tue, 26 Jun 2018 15:07:02 -0400
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0
MIME-Version: 1.0
In-Reply-To: <020601d40d7d$20f00160$62d00420$@ndzh.com>
Content-Type: multipart/alternative; boundary="------------FBF1D30D788A3D7C2B96FA1B"
Content-Language: en-US
X-Originating-IP: [66.129.241.10]
X-ClientProxiedBy: BN4PR12CA0023.namprd12.prod.outlook.com (2603:10b6:403:2::33) To DM5PR0501MB3863.namprd05.prod.outlook.com (2603:10b6:4:7b::26)
X-MS-PublicTrafficType: Email
X-MS-Office365-Filtering-Correlation-Id: 2925dcff-b7d5-4434-f36f-08d5db98021a
X-MS-Office365-Filtering-HT: Tenant
X-Microsoft-Antispam: UriScan:; BCL:0; PCL:0; RULEID:(7020095)(4652020)(8989117)(5600026)(711020)(48565401081)(2017052603328)(7153060)(7193020); SRVR:DM5PR0501MB3863;
X-Microsoft-Exchange-Diagnostics: 1; DM5PR0501MB3863; 3:vGtfHfbcrTX+BoxhmphXxZGNCJ0XGpQokmEG/NAIVxR5Bj/E50MtanLZ614+ESHeq/zwgU7x0WeqLq4kKr4Q7Fdqqp+3jR7ZCIzpk+gy4DjBfLdKTpm28ITwP3rfNOFRJkmxStt55Mi0WMlePR3xc7wv22ONwUiVXeq+OTzxdHtTSLXjjHf7A8VbncBYcy9maf/rmmRN5wLuAGdcZfr0BSDEZsy00T3/cXtpDoJgZHiTxH4PZ+8Uw1sXyqGLT9Nb; 25:JwHF0bJy4qsCJHvC2PzK3WGEfTCdh4YTKv2O9djg0hdo7M/yyvkdg/1YJwNTTMAFuxypAGL9MFBS/9SG00XRrwM60JoYv+MdJZrpk2IUMUTeBRB6abBww4KidAQyT92PQz/tLjio9aDy6xtbRwRXcpWO64ItCIih+e0nuwKa5nnN1A2to7a3aO6Gq3XIb37da/86d6PgPWx9Xeym16hLTIAtqcuOTTmy4tu7QXJJC8PXYgFzloCnT+h2UHFAOLy2xIYAPDNK1Ub68dNhBvpV1+eonBf+abAQjDgwKP2PO+91T7BGYJhmR2GRtB8a1U3rwBqiwFljmh/pF5g4RJZ8nw==; 31:pU/K99GkRZg/C29LW6Tk5ePTH0v/g7qWbW254bU3NZcRxYLNnWWUKQjRBKr+pDia31Afn32PRwLzUPfZ4BkvbFkmf4USCOLSdd6LkKhF4N66huEISQdet6Nhz47oNCGM8bSthUp2wtII/nWibRGGnbTgyR9tEoaHW424LJSSb/eFlhOtRq//ZgF1FYygeO9Ds+KWgZHiwlcKark/Qg1V9WXKuFQrUm8vwAeQ+CXkQQ8=
X-MS-TrafficTypeDiagnostic: DM5PR0501MB3863:
X-Microsoft-Exchange-Diagnostics: 1; DM5PR0501MB3863; 20: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; 4:oL4hBUVmbFgyrk94VpsDTPKU/gTiSDrYVVlwvVOEecWvqhHJ/WsNL5TWIdzHHEHnU3weFTRPKF9Y5evKuTrso79V4XbnTsR9sHOkCbwXo87c8tD4kiu30Qe6VSpv9ImH348hO2KzQG8ZWw5Pv+5k18pMp9OouKhYcAJfyCZLjk2bYvFL4oy4UDZpey0ScyCTRQuWrzI1KPY+gxf66g45eKzcmOSWGZZgrAZ/Zlr6f9j4IrM9NvCkCVjuJisjpkWIGJw5MfJh+/+gH6rLnuDrBA==
X-Microsoft-Antispam-PRVS: <DM5PR0501MB3863CFDB84BC4D4873CD8B0AD4490@DM5PR0501MB3863.namprd05.prod.outlook.com>
X-Exchange-Antispam-Report-Test: UriScan:;
X-MS-Exchange-SenderADCheck: 1
X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(8211001083)(6040522)(2401047)(5005006)(8121501046)(10201501046)(3002001)(93006095)(93001095)(3231254)(944501410)(52105095)(6055026)(149027)(150027)(6041310)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123562045)(20161123560045)(20161123564045)(20161123558120)(6072148)(201708071742011)(7699016); SRVR:DM5PR0501MB3863; BCL:0; PCL:0; RULEID:; SRVR:DM5PR0501MB3863;
X-Forefront-PRVS: 071518EF63
X-Forefront-Antispam-Report: SFV:NSPM; SFS:(10019020)(6049001)(346002)(39860400002)(376002)(136003)(366004)(396003)(189003)(199004)(25786009)(53936002)(478600001)(65826007)(5660300001)(36756003)(3846002)(54896002)(6666003)(6116002)(65956001)(65806001)(76176011)(16526019)(77096007)(3260700006)(68736007)(2906002)(6246003)(66066001)(4326008)(26005)(956004)(446003)(11346002)(31686004)(16576012)(2616005)(16586007)(58126008)(31696002)(476003)(52116002)(53546011)(84326002)(64126003)(6346003)(110136005)(229853002)(8676002)(386003)(8936002)(316002)(486006)(106356001)(6486002)(33964004)(97736004)(7736002)(37036004)(81156014)(81166006)(86362001)(105586002)(217873001); DIR:OUT; SFP:1102; SCL:1; SRVR:DM5PR0501MB3863; H:[172.29.33.16]; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1;
Received-SPF: None (protection.outlook.com: juniper.net does not designate permitted sender hosts)
X-Microsoft-Exchange-Diagnostics: 1; DM5PR0501MB3863; 23: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
X-Microsoft-Antispam-Message-Info: roMqmmIJ8AC/uOzMBy28w28STPSUtxqbvgGDcVL5FkpACWf2uBzLMOBARUkyjIZ5/R2QlUCWujxygig0bGsUu40MPblKCkP09i0ExyHk3bXQ1+QdlqAXgCHes6KMHrOE996EEGdMhXUoxjzRvr7f55nICj5AtEzqJURhsEsNnWh9NRFYUeW6xWQ9ACHTjqEDBSBdNxfxRCYD0Yz6lYtOj9rFCIML1Dj1AmHn7qtDV0mEfZba+BILWzFpDrzwd+2GL7fHIf9uUlboBe4q8oXDyVmM33te+OXUD3OIsFvirRzbzBrgwYBd3T3tR94z2D5/4lsdCGazJT3mgZrFw4JhvZzDTOzaMhJgFNtdV7aXhIo=
X-Microsoft-Exchange-Diagnostics: 1; DM5PR0501MB3863; 6:Yp7bjN+Y9Y0oJQfywpuTJ2M2ysii5bePEcnVrJ3xL5Fz81DPJctzE8a/uH4DfKxMLws3LaGFQPj6qBDSz/Cj+DYsoZ80V7X2m8tBgZEInjE0sxqQCbmLgZipTZaWoTaPBllFG2syb1ByQgAlMIX8sp89h4KDOrZ+R09w+7kK2J+JpeyxBN4Y2aVscdbTHk993g909Os+40dJjQtrbcbuhV11Mgs+3fag+OGhOev4bGMPpeHsfjb6q5w/H3pbclw5zy0veswXEpcyAUpOC98S3p0oJk40JJemSCw2NCVQ7bMc49HgfPAMByL1AF5N/y2nm6zA3KhtqmWaaqF6p8EBY7AHwG00uL+lTMLxF4k++ufGfc7MknXuYYW8CGfCw9H4u/IRiQx+trgdkfo1nEd0RYGW54DgRvlQ9ZIQHbVZ+Z2REYpHOvQcZZvAOq3iMzL0Vc1JtCIA7Mnb8bjaQG7Upw==; 5:0IxLzTpl5kMiJoZgI1iebHl+Y+nH8+DyHltVgwtPFmXKwlcR0boCFkpstygyl56pc0YSID+c4EavdhPLgnXYpMltkUiMYpuFjg6ztVN9v9KRPukUOOwoOTwA1SYNPkvQY7Lld78/OGbTby1XbEQsiDDSCSRkLJ+Hz25eus1PdkA=; 24:VLqy2Npyhz1xFAOeSwNh0a8jaJF1oYh/j6gRYx/Pj98QIG/hqh5Cpy32wzvqRV5xxr1y6tvhuKbLvgA8HwyIWH18udFF9nRa8uZR+59/uv8=
SpamDiagnosticOutput: 1:99
SpamDiagnosticMetadata: NSPM
X-Microsoft-Exchange-Diagnostics: 1; DM5PR0501MB3863; 7:75oYvWVjHcmot2Ko8NGlI66khakpni1DFExWHCwCUxXyv+PImw2qlfOXvXjAaM1GbbukudcbqdsgpAeKIlbqoybrJDuHNtt4ZLFBPOVPuCyUmAeKQS9SFgXKkkPRAb19xZKNDgILD6cdjCbE/VeezPi4w0LZUicx/tCsIm0uokAfGChysdvIFgHsCHHzI0igUGnF0Es8YdatCSnlZg3tvEut/5DDKqnpyceIot3wO04rrtPnyOYsnJKBaeI+cuwC
X-OriginatorOrg: juniper.net
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Jun 2018 19:07:05.2470 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 2925dcff-b7d5-4434-f36f-08d5db98021a
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: bea78b3c-4cdb-4130-854a-1d193232e5f4
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR0501MB3863
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2018-06-26_09:, , signatures=0
X-Proofpoint-Spam-Details: rule=outbound_spam_notspam policy=outbound_spam score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=673 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1806210000 definitions=main-1806260212
Archived-At: <https://mailarchive.ietf.org/arch/msg/idr/wkseGCCNfRDLzjXKywmKd7ZwQFI>
Subject: Re: [Idr] Does SRGB TLV in draft-ietf-idr-bgp-prefix-sid qualify for BGP Attibute discard?
X-BeenThere: idr@ietf.org
X-Mailman-Version: 2.1.26
Precedence: list
List-Id: Inter-Domain Routing <idr.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/idr>, <mailto:idr-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/idr/>
List-Post: <mailto:idr@ietf.org>
List-Help: <mailto:idr-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/idr>, <mailto:idr-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 26 Jun 2018 19:07:13 -0000

On 6/26/2018 2:40 PM, Susan Hares wrote:
> If these facts regarding the non-dynamic nature of the changes, then 
> indicate this in the draft-ietf-idr-bgp-prefix-sid draft (or another 
> SR draft and point to it). 

I'll leave that to the authors, but I think this falls under the 
category of "some familiarity with the normative references is presupposed".

> On the interaction with routing, you are indicating a routing 
> interaction:
>
> “If you do discard-attribute, the prefix is still reachable via the 
> ordinary non-traffic-engineered routing; this does not cause any loops 
> or oscillations, as the ordinary routing is not impacted.”
>
> You are discussing changes that fluctuate SR routing and ordinary 
> routing.
>

I think I already explained why attribute-discard is a more appropriate 
policy than treat-as-withdraw for a malformed prefix-SID attribute.

Most BGP attributes have some effect on routing, the question is whether 
discarding a malformed attribute will result in inconsistent routing 
(loops).

v2.23.0 | Report a Bug | By Email