Re: I-D Action: draft-ietf-bfd-yang-17.txt

tom petch <ietfa@btconnect.com> Sat, 19 December 2020 13:04 UTC

Return-Path: <ietfa@btconnect.com>
X-Original-To: rtg-bfd@ietfa.amsl.com
Delivered-To: rtg-bfd@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 189BC3A1068; Sat, 19 Dec 2020 05:04:08 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.9
X-Spam-Level:
X-Spam-Status: No, score=-1.9 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_BLOCKED=0.001, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (1024-bit key) header.d=btconnect.onmicrosoft.com
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 4sMLgBpMw7eB; Sat, 19 Dec 2020 05:04:06 -0800 (PST)
Received: from EUR05-AM6-obe.outbound.protection.outlook.com (mail-am6eur05on2112.outbound.protection.outlook.com [40.107.22.112]) (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 32F143A1067; Sat, 19 Dec 2020 05:04:05 -0800 (PST)
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=niNDa4so3HJ/4kZxKaHf8QDCV+LgJUNnHARMq5dWX8VtR/jKbtyJaStWz1rPbfEbQXXgIWuoTHmR/vO7UU2rdcZKoLcPv2nRqdnsMKQipxhSRrl9/g2Ddc9w2Xm0/A8dJMfp+r3M2faFun47yo/Cd2Br9DikBDSjBg9c6QsVLpMy9a2EOxU+wh9/W6OOlXKf60W3EM8t2N762ub1uO1Fj5MeKLYcKXrsSNfQwGqcksNrIuuMyiX35as5jJJivuqRt0Ztx32SBYK5kPZMdkTQmZvP6fShI+ZYRt1phhKys9X1TwJnZFmkLyBKXolkQ49frf4VI9dx1tdndKXFrLOcig==
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-SenderADCheck; bh=P4j7wKUtCiCmkSzCzHys45F2NK/w+hvK6sO2Un6KuYw=; b=VDboo9aOoeeUdsTAy+wHFBnvx9ziN+U0gQ7drG4HdgZGHwKhEzBLMejxDvq8HCzzSBP6En/2axO6cNMsv55+52VThvu4pADvlY8+oY1YWnAE/qFqp2DztmoYO+5jtbIGmUAHrbjnrk/sMLzLlMCe/HbhDQWu7O9C0i3IQl278XrpJof+emcQaxFpcnIAwWt4Q9f5lDD7mV4URwZrByE0jSfSZt6HAtOW2PgLokkjsFlN1jAG/05PLYwG08PyH3ZZgpiLJLxHESYv+SHgMXrjXOiz2Lxq8VgjhQrcRq5kijYErKnqjl8S1/exOMhlw+oZJ9f8KEDOPXIf67heKMwaGQ==
ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=btconnect.com; dmarc=pass action=none header.from=btconnect.com; dkim=pass header.d=btconnect.com; arc=none
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btconnect.onmicrosoft.com; s=selector2-btconnect-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=P4j7wKUtCiCmkSzCzHys45F2NK/w+hvK6sO2Un6KuYw=; b=ES8QE4i8WRFERTEahSs8zPfqJU9/REtC1dLyinam/WrtogggUX0HcZzpwzFkVgc7FX7VAWDVyNulafT1gAZNcua32xMqEPfqm/Rf57fFRIBCAjWSYFSwiG9HDRQonBGT0kv0a+ptcxviP6F6Lk9Rw5mP3LwBR9kOHPIGRVbeIuA=
Received: from AM6PR07MB5784.eurprd07.prod.outlook.com (2603:10a6:20b:95::29) by AM7PR07MB6996.eurprd07.prod.outlook.com (2603:10a6:20b:1bd::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3700.21; Sat, 19 Dec 2020 13:04:04 +0000
Received: from AM6PR07MB5784.eurprd07.prod.outlook.com ([fe80::2c1e:7c35:41ed:9e88]) by AM6PR07MB5784.eurprd07.prod.outlook.com ([fe80::2c1e:7c35:41ed:9e88%7]) with mapi id 15.20.3700.021; Sat, 19 Dec 2020 13:04:03 +0000
From: tom petch <ietfa@btconnect.com>
To: "Reshad Rahman (rrahman)" <rrahman@cisco.com>, Jeffrey Haas <jhaas@pfrc.org>
CC: "rtg-bfd@ietf.org" <rtg-bfd@ietf.org>, "draft-ietf-bfd-yang@ietf.org" <draft-ietf-bfd-yang@ietf.org>
Subject: Re: I-D Action: draft-ietf-bfd-yang-17.txt
Thread-Topic: I-D Action: draft-ietf-bfd-yang-17.txt
Thread-Index: AQHWdw+Iwlfgxu0FCUW16VNI6cmA0KlBRFQAgAEMZVmAAB6BAIB5GglvgEOWfqM=
Date: Sat, 19 Dec 2020 13:04:03 +0000
Message-ID: <AM6PR07MB57840A9782624674211C044CA2C20@AM6PR07MB5784.eurprd07.prod.outlook.com>
References: <C71CC69E-DAE4-49E0-983A-9B2EE9B4CD46@gmail.com> <D5A12762.2D4DB5%rrahman@cisco.com> <E4E310A2-A79C-403E-B68E-A39B76E2C5E0@gmail.com> <773E4FFC-D66A-49E5-A03A-58B7DBA82D90@gmail.com> <20170731170550.GO24942@pfrc.org> <BAF4C9E6-ED02-4E25-89DD-2FA181AF3B72@gmail.com> <3637B198-8F82-4A85-A4A1-4383AF98088D@pfrc.org> <D26CB257-E4B2-42FA-940E-BF77C8BC1751@gmail.com> <20170801144129.GC24942@pfrc.org> <F319C69C-3A4E-4C5C-ADA4-37BDFD97E91A@gmail.com> <20170801163340.GD24942@pfrc.org> <5F3EA5A8.1050202@btconnect.com> <6D3A9C62-D1FA-4382-B253-9CBC7BEAFD69@cisco.com> <DB7PR07MB534039E99915BC162D4B6CA1A25B0@DB7PR07MB5340.eurprd07.prod.outlook.com>, <DC0A86C4-D9F0-4725-A2A8-7FA481A9DE27@cisco.com>, <AM6PR07MB5784521D81DBF9D60A5BCF12A2ED0@AM6PR07MB5784.eurprd07.prod.outlook.com>
In-Reply-To: <AM6PR07MB5784521D81DBF9D60A5BCF12A2ED0@AM6PR07MB5784.eurprd07.prod.outlook.com>
Accept-Language: en-GB, en-US
Content-Language: en-GB
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
authentication-results: cisco.com; dkim=none (message not signed) header.d=none;cisco.com; dmarc=none action=none header.from=btconnect.com;
x-originating-ip: [86.146.121.140]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: b0360e52-7fb9-4f3b-0882-08d8a41e8fac
x-ms-traffictypediagnostic: AM7PR07MB6996:
x-microsoft-antispam-prvs: <AM7PR07MB69962EF0DA26653C5A8EB6C8A2C20@AM7PR07MB6996.eurprd07.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:9508;
x-ms-exchange-senderadcheck: 1
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: mYkM5ReJcWOWnfO4EDd2t3IBPyuilTZxMwkH6kX/U8uBKDRzs9TDtPnU0zatn3hj5jwnvERG5QS+fVRdLwWFEFkcIhv/Kwv9ho/1vp8ykRnSmsEcs6xWu9+cyn2uew76aS1hFFsF1cLxi03b0V2mNsS9xvsHhK1oLx9fpx+yv9K0UV5YFeVJbkjl8vzXOgIKGNQNZmNbM2N89jMo/IH6t6G9Y4fGCieE1TS9TDsz/1WVGSZiYweUuNnTnc2E6CGIXKh4qqjfiOwf9FmkCtdMtAlzSTtWmodXlncfRPEftPopsF75j6U2ggUb98F7QI6w3KTJpy89r77P6oxhaivuzP2D7DtpFzWe6cVHeHC4HRv8u9D8te4k79+UydoH2yVgWT+6LlP8o/y33Yxli2lg7g==
x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:AM6PR07MB5784.eurprd07.prod.outlook.com; PTR:; CAT:NONE; SFS:(346002)(376002)(396003)(366004)(136003)(39860400002)(9686003)(4326008)(55016002)(478600001)(66476007)(33656002)(8676002)(8936002)(26005)(71200400001)(110136005)(316002)(7696005)(66946007)(5660300002)(64756008)(52536014)(86362001)(54906003)(76116006)(66446008)(2906002)(6506007)(186003)(83380400001)(66556008)(53546011)(91956017); DIR:OUT; SFP:1102;
x-ms-exchange-antispam-messagedata: =?iso-8859-1?Q?jQY0sragLLT+zZ9uHhfP0wpTYtEaMNSWrRLiLlJVSZhAclniiCgMK6l6lr?= =?iso-8859-1?Q?5zx4DLv64VCuxj6ipiny6fXufsciNDETif1lIptWHtWcyAZIpdh65QN91n?= =?iso-8859-1?Q?IugjkI6CzC2g3KRzuINgLGTI8bRFgY6g3TuD323JsjR3IxD2IFwMt0YJxB?= =?iso-8859-1?Q?SPHfbde3+abX+3ELbdPCohWT3M3vOC+IyBdv1EhYgU1vDzps/MRYGWDdzt?= =?iso-8859-1?Q?/RTTqVuKrUuZxXOuDyTozY/nP0S4nQ3y2WC/y2tOu4zAzZ6YwI9eFB7ofN?= =?iso-8859-1?Q?N1y6HrR7FTT0bMeYKKxRPL9l+AbCmmk5xaqduUPq7l8vlaxyv1bvBgILlT?= =?iso-8859-1?Q?qqy8fsDwPj3Bwhr7DF4Vw2O6lmJUJrT9U1Tb5AvJKb1gsAm8q+5hjIanAz?= =?iso-8859-1?Q?aBt/3/gy5HPqSz5HAeuDLzUlyUeq33MvZfbFEpaO2umMw4OkhkJgWiWzNN?= =?iso-8859-1?Q?Gjx7bp0yRNX/lZBNxkTXHfrHw7qI6BRWwLRRda8gZtslgLu6WLPLv9mUTs?= =?iso-8859-1?Q?0RWKWc68PxREJ5O5I0DgRlvXtApltgnnGzWHaJ1uIlZxKHj5rTI15kvbIV?= =?iso-8859-1?Q?xHRZWAwef5QWiOzhDZqI+P0hz1H039NCaHJ/f0DbJmLLsIlXseUbq8uLAb?= =?iso-8859-1?Q?0y88OCmu0+3I1Fdva44Bm4VhFjQm8lL0c+Oh1yEu2+KQnqUTnJu9q4mNL1?= =?iso-8859-1?Q?mWmzrQGhwIVp7kYdcVhDY/1A7BS7jFiC1jHr+f4kii0SFiQfLIEJjEprO7?= =?iso-8859-1?Q?Epk0cXTZD4keKVzza9XLFtGdLsA1ArYvuZ1TnqwYXGmMfKyEwkXB+DP0Od?= =?iso-8859-1?Q?D2919+FSF+Slf5DEaNfIDAeahwoqLheQmBLXEve6OYj90d+a/dbnoA6SUK?= =?iso-8859-1?Q?pYxf8aJbGO9PT3wHXs0Gvcsrci11ySyQOYIB8exYap6YvV9U8n8p5C2y1Z?= =?iso-8859-1?Q?f6mFt6kUD8a5RE7miD/4ISKYFAj4qtEaoF5vulSZW0nT5QHPENvxFIy9GO?= =?iso-8859-1?Q?8/cTL4cCZndgy8YN0=3D?=
x-ms-exchange-transport-forked: True
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-OriginatorOrg: btconnect.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: AM6PR07MB5784.eurprd07.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: b0360e52-7fb9-4f3b-0882-08d8a41e8fac
X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Dec 2020 13:04:03.8216 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: cf8853ed-96e5-465b-9185-806bfe185e30
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: GGkCDgX9a9Xs3Zx/wEtZ9IrUWNbcA1Nwc6+S1gS9jCiguQSM2imYqMGPDHspIOriJdsoJqJ96TkuodUG/RYhRA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM7PR07MB6996
Archived-At: <https://mailarchive.ietf.org/arch/msg/rtg-bfd/IoHCU8HaVB9qWHgx3tze9Pjq_kM>
X-BeenThere: rtg-bfd@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "RTG Area: Bidirectional Forwarding Detection DT" <rtg-bfd.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/rtg-bfd>, <mailto:rtg-bfd-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/rtg-bfd/>
List-Post: <mailto:rtg-bfd@ietf.org>
List-Help: <mailto:rtg-bfd-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/rtg-bfd>, <mailto:rtg-bfd-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sat, 19 Dec 2020 13:04:08 -0000

From: Rtg-bfd <rtg-bfd-bounces@ietf.org> on behalf of tom petch <ietfa@btconnect.com>
Sent: 06 November 2020 12:58

From: Reshad Rahman (rrahman) <rrahman@cisco.com>
Sent: 21 August 2020 12:31

On 2020-08-21, 5:57 AM, "tom petch" <ietfa@btconnect.com> wrote:

    From: Reshad Rahman (rrahman) <rrahman@cisco.com>
    Sent: 20 August 2020 18:42

    I had noticed the lsps vs lsps-state, mentioned it at last BFD WG meeting and have been in touch with the teas-yang authors.

    I hadn't noticed that mpls:enabled had been removed. I'll have to go through all MPLS-related items in the BFD yang.

<tp>
mpls-base has been approved by the IESG and is wending its way through the system and that is a Normative dependency for bfd-yang so the there might be progress on bfd-yang.  I had a look at the tools pages and MISSREF but do not understand what it is telling me:-(

<tp2>

mpls-base is now RFC8960.  As yet I do not see any consequential changes in the I-D in the RFC Editor Q but I am not sure what I should be looking for so I shall keep looking :-)

Tom Petch


    <tp>
    Yes please; enabled is still there but in a different place; I have not gone back to mpls-base-yang-03 to see if the semantics are the same.

    Note my third rather indecisive comment that mpls-base-yang now models mpls in a different way, splitting IP routes with some MPLS, from MPLS only routes, with no IP, as described in mpls-base-yang-15; I have not got my head around this and do not know how it fits with bfd but suspect that it needs some thinking about.
<RR> I don't think it has an impact because BFD uses an IP-prefix as MPLS-FEC. But I will take a look.

    I read the meeting minutes but your significant (for me) contribution appears to have passed the minute taker by:-)
<RR>  It was mentioned in the chairs slides though.

Regards,
Reshad.

    Tom Petch



    Regards,
    Reshad.

    On 2020-08-20, 12:33 PM, "t petch" <ietfa@btconnect.com> wrote:

        Yes bfd-yang.  Sometimes I would like to be wrong.

        When I look at this I-D, I see that it references
             /rt:routing/mpls:mpls/mpls:interface/mpls:config/mpls:enabled
        In 2018, the MPLS WG removed that /config from the mpls-base-yang so
        this would seem to be no longer valid. What needs changing to rectify
        this I have not explored.

        The I-D has
              augment "/te:te/te:lsps-state/te:lsp"
        which I no longer see in  draft-ietf-teas-yang-te - the -state has gone.
        Again, I have not explored the ramifications of this.

        MPLS WG has a new base-yang out this week which differentiates between
        an IP route with a MPLS next hop and a MPLS route with no IP, the latter
        forming a new, mpls Address Family.  I would think that the latter is
        not catered for by BFD but it would be nice to be wrong

        Tom Petch