IETF Logo Mail Archive

Re: [bess] A doubt about draft-sajassi-bess-evpn-ip-aliasing-05

"Ali Sajassi (sajassi)" <sajassi@cisco.com> Thu, 17 November 2022 15:49 UTC

Return-Path: <sajassi@cisco.com>
X-Original-To: bess@ietfa.amsl.com
Delivered-To: bess@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 0A50AC1524CC; Thu, 17 Nov 2022 07:49:34 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -14.597
X-Spam-Level:
X-Spam-Status: No, score=-14.597 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, DKIM_VALID_EF=-0.1, HTML_MESSAGE=0.001, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H2=-0.001, RCVD_IN_ZEN_BLOCKED_OPENDNS=0.001, SPF_NONE=0.001, URIBL_BLOCKED=0.001, URIBL_DBL_BLOCKED_OPENDNS=0.001, URIBL_ZEN_BLOCKED_OPENDNS=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=HFb0fFuh; dkim=pass (1024-bit key) header.d=cisco.com header.b=FsOUFQIC
Received: from mail.ietf.org ([50.223.129.194]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GSCVj2uynliS; Thu, 17 Nov 2022 07:49:30 -0800 (PST)
Received: from alln-iport-3.cisco.com (alln-iport-3.cisco.com [173.37.142.90]) (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 01B01C1524C6; Thu, 17 Nov 2022 07:49:29 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=10726; q=dns/txt; s=iport; t=1668700170; x=1669909770; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=v1mzBU1x9Q410e96GKcK353yqRRSNcuVz9yx132irys=; b=HFb0fFuhM10CXGQ5Iai0HagNXnN+Y42AsHH227ybeSHqSjuj/ROxIrsR mjN33yfKILT8qxhQkkeFBBi32qbMy5J1XrfOZC2+idO2JcvEQtzqoQFir eEFv+xumv6tO558aFHLmqj70v7WcdfuaEIiKepXyNEYjh1hmaPVA9CQkc 4=;
X-CSE-ConnectionGUID: iZ9QUcrFT/q7A5Ls0K0LGQ==
X-CSE-MsgGUID: GxLEv1kPSv2HbfCwSxoS0A==
X-IPAS-Result: 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
IronPort-PHdr: A9a23:B4nBpBPPiCwia9ZBZLcl6ncDWUAX0o4cdiYZ6Zsi3rRJdKnrv5HvJ 1fW6vgliljVFZ7a5PRJh6uz0ejgVGUM7IzHvCUEd5pBBBMAgN8dygonBsPNAEbnLfnsOio9G skKVFJs83yhd0ZPH8OrbFzJqXr05jkXSX3C
IronPort-Data: A9a23:mSMNHKKbtnb/sAw+FE+RMZQlxSXFcZb7ZxGr2PjKsXjdYENS0WECy GcdXG2FP6qCN2r9coh3Oo3i/E1QvMXVn94ySAsd+CA2RRqmiyZq6fd1j6vUF3nPRiEWZBs/t 63yUvGZcYZsCCeZ/k/xWlTYhSEU/bmSQbbhA/LzNCl0RAt1IA8skhsLd9QR2uaEuvDkRVLT0 T/Oi5eHYgX8gmcrajt8B5+r8XuDgtyj4Fv0gXRmDRx7lAe2v2UYCpsZOZawIxPQKmWDNrfnL wpr5OjRElLxp3/BOPv8+lrIWhFirorpAOS7oiE+t55OLfR1jndaPq4TbJLwYKrM4tmDt4gZJ N5l7fRcReq1V0HBsLx1bvVWL81xFax0qYb6KmKRjYuKkGSbV2C04K1KI3hjaOX0+s4vaY1P3 fUcLDZIZReZiqfrhrm6UeJrwM8kKaEHPqtG5Somlm+fVK1gGMuTK0nJzYcwMDMYnclMFO3FZ uISaCFka1LLZBgn1lI/Uc9uzLn13CKXnztwh0KxiLRu4FDo0lZR2rbGL+HFfefSbJAA9qqfj iecl4jjOTk2Md2D0yvDzHuoiurGmwvhUogUUra/85ZCulqVgFcfAQwRUkGTu/OzjAi1XNc3A 2UQ9zonq6Q/7gqFQ8PxWhS+iGSOtBhaUN1Ve8Uc6R2Ww6ySzwGdC3YsVDRLbpots8pebTYnz UShnt71C3poqrL9YXaU/KqOoT6ufykYMWEqaioNTA9D6N7myKk/lBvBUpN4Gay8lcb0XDv92 CvPoTYmgfASlYsC06Sy5lHBjBqtq4THCAkv6W3/d2ao/gp/aIO/IbKh6F7A7epNLYCxVFOLu j4PnM320QwVJZiJkCrIS+IXEfT0of2EKzbbx1VoGvHN6giQxpJqRqgIiBkWGaujGpxslePBC KMLhT5s2Q==
IronPort-HdrOrdr: A9a23:cmtSqK5Xb00CGnRJDAPXwXaBI+orL9Y04lQ7vn2ZFiY6TiXIra +TdaoguSMc0AxhJE3Jmbi7Sc29qADnhOFICOgqTPqftWzd2VdAQ7sSlbcKrweQeREWs9QtqJ uIEJIOROEYb2IK9voSiTPQe71Lrbn3k5xAx92utUuFJjsaDJ2Imj0JczpzZXcGIjWua6BJca a0145inX6NaH4XZsO0Cj0uRO7YveDGk5rgfFovGwMnwBPmt0Lm1JfKVzyjmjsOWTJGxrkvtU LflRbi26mlu/anjjfBym7o6YhMkteJ8KoMOCXMsLlVFtzfsHfqWG1TYczBgNnzmpDr1L8eqq iNn/7nBbU215qeRBDznfKn4Xif7N9n0Q6S9bbfuwqknSQ8LwhKU/aoQuliA0LkAgMbzaFB+b MO0GSDu5VNCxTc2Cz7+tjTThlv0lG5uHw4jIco/jRiuKYlGclsRLYkjQpoOYZFGDi/5JEsEe FoAs2Z7PFKcUmCZ3ScumV02tSjUnk6Ax/DGyE5y4ao+ikTmGo8w1oTxcQZkHtF/JUhS4Nc7+ CBNqhzjrlBQsIfcKo4DuYcRsm8DHDLXHv3QSmvCEWiELtCN2PGqpbx7rlw7Oa2eIYQxJ93g5 jFWEMwjx9ER6svM7z74HRmyGG5fIzmZ0Wf9ih33ekKhoHB
X-Talos-CUID: 9a23:e9a/AmhT8u3bWaiMBQkmnmU42TJuc0+M9UrbOWGETn82YeCxUgezoIdLqp87
X-Talos-MUID: 9a23:ITcD+AlxHG2eb3veNSYidnpNJONF/f2tMHsTy7UMteKbDjx3AG+02WE=
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-AV: E=Sophos; i="5.96,171,1665446400"; d="scan'208,217"; a="15886523"
Received: from alln-core-5.cisco.com ([173.36.13.138]) by alln-iport-3.cisco.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Nov 2022 15:49:28 +0000
Received: from mail.cisco.com (xfe-aln-003.cisco.com [173.37.135.123]) by alln-core-5.cisco.com (8.15.2/8.15.2) with ESMTPS id 2AHFnS39010753 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=OK); Thu, 17 Nov 2022 15:49:28 GMT
Received: from xfe-rtp-001.cisco.com (64.101.210.231) by xfe-aln-003.cisco.com (173.37.135.123) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.9; Thu, 17 Nov 2022 09:49:28 -0600
Received: from NAM11-BN8-obe.outbound.protection.outlook.com (64.101.32.56) by xfe-rtp-001.cisco.com (64.101.210.231) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.9 via Frontend Transport; Thu, 17 Nov 2022 10:49:27 -0500
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=fQoTgTgevrSO+fzR8v+r/lsdBo3gAMVZ+CgbDCPRQpPoibwd547Eh/nMsU6m8qHg7ClhpUQEuIawVo/wCLgBV7/hUTjYDBNHswTaPNoKM9Qv7wQsboa5suLvQF5Q1KSOJIt/dEue3JQZifyUn1EEoDBKG3PJ1Yn3l9gw0Kl9WZDaldLXXk5o9JgXp4JQ7+1eF/iqy5DOr2kDjnTSJWhIfx5cg7nOn2FJAqSOAASdtmeh9EdmE8q/1SpWJyEe+AoD4Ofa6dXyOOcwPB2ZRuNubJ5TrOaZMJE9cjNQhEJa+dmBEVorkAtEpSOztmcGVpQ2l3iWRE40muWuz2wOcHJ+Kg==
ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=oh2pqyGdPywjkJPhuruPaoFd5yeyhWqhAyDLqqyJaQ8=; b=IYVHazMqzltiL9lPt7Q3h41c9qwQg4V+5vsIWP/hJvx8nZP4NuxAwaMZYYH5VuAnkhP4CPPYztqQ5G+wmrv79I4B+BBB7bUXj2b32vfMvIhSiVpZFwZYFZc81+5aQRTVaPNfQgfWCfihEtpwXnegzfsgQs2iAC8qytwLsAPH7SmOrO8eFbe7rTPFRtYirBtaVf/1OmbQa/sx7s6ZM4waLuzzFeHTDJcy3FKu8gnPyDIBmM22C4zNK5/e2LK5J+o8+ofOB+Gp/D26ra9KyDyYpMNiSwvDMbgjKBSGrxk1A1Tes8zdxNg4s/XYaxIc96PLn8HGJw9WiD2LWWmhG5HcLg==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=cisco.com; dmarc=pass action=none header.from=cisco.com; dkim=pass header.d=cisco.com; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cisco.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=oh2pqyGdPywjkJPhuruPaoFd5yeyhWqhAyDLqqyJaQ8=; b=FsOUFQICD16ljvTXP4Ho0YZ1e4aLyjAryZHVgMfKkkKHaRuieJETA6oWeOkYrHNYJr3VsDv547KO5Unt0KnCWEYM1vmqMnx+c3MePvfXQ0bdyFiDhFWd/ancSQ7AlieGTw8E+HRfpP/rn1q59zl1vPaS5wo2sld2O2Xx2SRs4Vc=
Received: from SJ0PR11MB5770.namprd11.prod.outlook.com (2603:10b6:a03:421::6) by MW3PR11MB4667.namprd11.prod.outlook.com (2603:10b6:303:53::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5813.19; Thu, 17 Nov 2022 15:49:26 +0000
Received: from SJ0PR11MB5770.namprd11.prod.outlook.com ([fe80::ef12:37db:4d85:f83e]) by SJ0PR11MB5770.namprd11.prod.outlook.com ([fe80::ef12:37db:4d85:f83e%8]) with mapi id 15.20.5813.020; Thu, 17 Nov 2022 15:49:25 +0000
From: "Ali Sajassi (sajassi)" <sajassi@cisco.com>
To: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>, "draft-sajassi-bess-evpn-ip-aliasing@ietf.org" <draft-sajassi-bess-evpn-ip-aliasing@ietf.org>
CC: Luc André Burdet <laburdet.ietf@gmail.com>, "bess@ietf.org" <bess@ietf.org>, Nitsan Dolev <Nitsan.Dolev@rbbn.com>, Alexander Ferdman <Alexander.Ferdman@rbbn.com>, Ron Sdayoor <Ron.Sdayoor@rbbn.com>, Dmitry Valdman <Dmitry.Valdman@rbbn.com>
Thread-Topic: A doubt about draft-sajassi-bess-evpn-ip-aliasing-05
Thread-Index: Adj6bdCd+Ge518W0QguYKTb7Uh0K/wAKzR6a
Date: Thu, 17 Nov 2022 15:49:25 +0000
Message-ID: <SJ0PR11MB57704522C59297454CB1971CB0069@SJ0PR11MB5770.namprd11.prod.outlook.com>
References: <PH0PR03MB63005F7D1706226657A167D8F6069@PH0PR03MB6300.namprd03.prod.outlook.com>
In-Reply-To: <PH0PR03MB63005F7D1706226657A167D8F6069@PH0PR03MB6300.namprd03.prod.outlook.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=cisco.com;
x-ms-publictraffictype: Email
x-ms-traffictypediagnostic: SJ0PR11MB5770:EE_|MW3PR11MB4667:EE_
x-ms-office365-filtering-correlation-id: 051f3a88-df6e-42bc-e540-08dac8b34dc5
x-ms-exchange-senderadcheck: 1
x-ms-exchange-antispam-relay: 0
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: 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
x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:SJ0PR11MB5770.namprd11.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230022)(4636009)(39860400002)(366004)(396003)(136003)(376002)(346002)(451199015)(166002)(38100700002)(83380400001)(33656002)(38070700005)(122000001)(86362001)(52536014)(478600001)(7696005)(9326002)(5660300002)(110136005)(6506007)(76116006)(64756008)(8676002)(66476007)(66946007)(316002)(4326008)(66556008)(41300700001)(66446008)(54906003)(71200400001)(8936002)(2906002)(55016003)(53546011)(186003)(9686003); DIR:OUT; SFP:1101;
x-ms-exchange-antispam-messagedata-chunkcount: 1
x-ms-exchange-antispam-messagedata-0: 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
Content-Type: multipart/alternative; boundary="_000_SJ0PR11MB57704522C59297454CB1971CB0069SJ0PR11MB5770namp_"
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: SJ0PR11MB5770.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 051f3a88-df6e-42bc-e540-08dac8b34dc5
X-MS-Exchange-CrossTenant-originalarrivaltime: 17 Nov 2022 15:49:25.5550 (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-CrossTenant-userprincipalname: 4rpZwdPUVMexvWpepFijBtb83YY/XB+o7I1r8eUnL2GHH0pddpJMR+a6ph2YQqxN/hWWGdSsFF2i7dHO/wVCwQ==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR11MB4667
X-OriginatorOrg: cisco.com
X-Outbound-SMTP-Client: 173.37.135.123, xfe-aln-003.cisco.com
X-Outbound-Node: alln-core-5.cisco.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/bess/hHeuR3Uu_gNIBT7rLjK2IBhvBBM>
Subject: Re: [bess] A doubt about draft-sajassi-bess-evpn-ip-aliasing-05
X-BeenThere: bess@ietf.org
X-Mailman-Version: 2.1.39
Precedence: list
List-Id: BGP-Enabled ServiceS working group discussion list <bess.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/bess>, <mailto:bess-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/bess/>
List-Post: <mailto:bess@ietf.org>
List-Help: <mailto:bess-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/bess>, <mailto:bess-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 17 Nov 2022 15:49:34 -0000

Hi Sasha,

EVPN based RFCs (7432 and 8365) define two types of multi-homing: All-Active and Single-Active. Both of these multi-homing mechanism relies on multi-homing PEs to control loop detection and prevention using DF election and split-horizon filtering.  draft-ietf-bess-evpn-l2gw-proto-02<https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-l2gw-proto-02> introduces a 3rd multi-homing mechanism called Single-Flow-Active for scenarios where loop detection and prevention are performed by CE devices (running L2GW protocols) and not PEs.

draft-sajassi-bess-evpn-ip-aliasing-05<https://datatracker.ietf.org/doc/html/draft-sajassi-bess-evpn-ip-aliasing-05> basically extends the baseline multi-homing mechanism of All-Active to L3 use cases mentioned in the draft (e.g., symmetric IRB). This draft is NOT intended for Single-Flow-Active multi-homing use case.  If single-flow-active multi-homing need to get extended to L3 use cases, then it can be covered in a follow-up single-flow-active draft.

Cheers,
Ali

From: Alexander Vainshtein <Alexander.Vainshtein@rbbn.com>
Date: Thursday, November 17, 2022 at 2:25 AM
To: draft-sajassi-bess-evpn-ip-aliasing@ietf.org <draft-sajassi-bess-evpn-ip-aliasing@ietf.org>
Cc: Luc André Burdet <laburdet.ietf@gmail.com>, bess@ietf.org <bess@ietf.org>, Nitsan Dolev <Nitsan.Dolev@rbbn.com>, Alexander Ferdman <Alexander.Ferdman@rbbn.com>, Ron Sdayoor <Ron.Sdayoor@rbbn.com>, Dmitry Valdman <Dmitry.Valdman@rbbn.com>
Subject: A doubt about draft-sajassi-bess-evpn-ip-aliasing-05
Hi,
I have doubts regarding applicability of the solution for L3 fast convergence defined in draft-sajassi-bess-evpn-ip-aliasing-05<https://datatracker.ietf.org/doc/html/draft-sajassi-bess-evpn-ip-aliasing-05> for the scenarios in which the MH ES in question operates in Single Flow-Active load-balancing mode as described in draft-ietf-bess-evpn-l2gw-proto-02<https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-l2gw-proto-02>.

These doubts are based on the fact that, in Single Flow-Active load-balancing mode, the Primary PE is defined by the Layer 2 Control Protocol (or its equivalent) for each specific host, while the EVPN IP Aliasing draft advertises Primary/Backup paths via P/B bits in the EVPN Layer 2 Extended Community attached to the IP A-D EVPN routes.

What, if anything, did I miss?

Your feedback would be highly appreciated.

Regards, and lots of thanks in advance,
Sasha


Notice: This e-mail together with any attachments may contain information of Ribbon Communications Inc. and its Affiliates that is confidential and/or proprietary for the sole use of the intended recipient. Any review, disclosure, reliance or distribution by others or forwarding without express permission is strictly prohibited. If you are not the intended recipient, please notify the sender immediately and then delete all copies, including any attachments.

v2.23.0 | Report a Bug | By Email