Re: [netmod] rfc6991bis: loopback addresses

"Acee Lindem (acee)" <acee@cisco.com> Fri, 31 July 2020 10:22 UTC

Return-Path: <acee@cisco.com>
X-Original-To: netmod@ietfa.amsl.com
Delivered-To: netmod@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 837E93A1228 for <netmod@ietfa.amsl.com>; Fri, 31 Jul 2020 03:22:08 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -9.62
X-Spam-Level:
X-Spam-Status: No, score=-9.62 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, 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=XLZII7/O; dkim=pass (1024-bit key) header.d=cisco.onmicrosoft.com header.b=uuL/OD6l
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 ev3Gl-B0_J46 for <netmod@ietfa.amsl.com>; Fri, 31 Jul 2020 03:22:06 -0700 (PDT)
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 C2E823A121F for <netmod@ietf.org>; Fri, 31 Jul 2020 03:22:05 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=3244; q=dns/txt; s=iport; t=1596190925; x=1597400525; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=Bd0gYslmxVxaNtIKuZKo8bLv1EI5vakmEGYj+uIaZIA=; b=XLZII7/O73gXhQ4K7OsnHDCfff6c9cYfd8z1PJN/UaaqKKPYhSRRExdA 8kWUQrxY29FRdxMwFv0Di6b+FfweM8J9nntZSMbww0KbvgmlvywP9+Ukz wkEVKM/vsFqqT7PAe5FFc3vskbU2ygTOKSuB6moDoWF8lZeTBck4FCPDF M=;
X-IPAS-Result: A0D3AACr7yNf/5RdJa1gHAEBAQEBAQcBARIBAQQEAQFAgTgFAQELAYFRUQdvWC8sCoQrg0YDjSklmGKBLhSBEQNVCwEBAQwBARgLCgIEAQGECEQCF4IaAiQ2Bw4CAwEBAQMCAwEBAQEFAQEBAgEGBG2FXAyFcgEBAwEBARAREQwBASwLAQ8CAQYCDgIKAiMDAgICJQsUARABAQQBDQUigwQBgksDDiABDpQ9kGgCgTmIYXaBMoMBAQEFhSAYgg4DBoEOKgGCb4NfgjqEBRqCAIE4DBCCTT6CXAEBgSoBEgEhgxYzgi2Sc6MbCoJgmgQDHp93kiOfIwIEAgQFAg4BAQWBWgkqZ3BwFTsqAYI+UBcCDY4fg3GFFIVCdDcCBgEHAQEDCXyORQGBEAEB
IronPort-PHdr: 9a23:1jEhdRcU7baxlzx5HqjyBjsklGMj4e+mNxMJ6pchl7NFe7ii+JKnJkHE+PFxlwaQA9fb9vtbhuuQuKflCiQM4peE5XYFdpEEFxoIkt4fkAFoBsmZQVb6I/jnY21ffoxCWVZp8mv9PR1TH8DzNF3Pq2K/7HgZHRCsfQZwL/7+T4jVicn/3uuu+prVNgNPgjf1Yb57IBis6wvLscxDiop5IaF3wRzM8XY=
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-AV: E=Sophos;i="5.75,418,1589241600"; d="scan'208";a="512581867"
Received: from rcdn-core-12.cisco.com ([173.37.93.148]) by alln-iport-3.cisco.com with ESMTP/TLS/DHE-RSA-SEED-SHA; 31 Jul 2020 10:22:03 +0000
Received: from XCH-ALN-001.cisco.com (xch-aln-001.cisco.com [173.36.7.11]) by rcdn-core-12.cisco.com (8.15.2/8.15.2) with ESMTPS id 06VAM1tZ005339 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=FAIL); Fri, 31 Jul 2020 10:22:02 GMT
Received: from xhs-aln-002.cisco.com (173.37.135.119) by XCH-ALN-001.cisco.com (173.36.7.11) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 31 Jul 2020 05:22:01 -0500
Received: from xhs-rtp-003.cisco.com (64.101.210.230) by xhs-aln-002.cisco.com (173.37.135.119) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 31 Jul 2020 05:22:01 -0500
Received: from NAM12-MW2-obe.outbound.protection.outlook.com (64.101.32.56) by xhs-rtp-003.cisco.com (64.101.210.230) with Microsoft SMTP Server (TLS) id 15.0.1497.2 via Frontend Transport; Fri, 31 Jul 2020 06:22:00 -0400
ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=m4KG9cTxxBev4JDCj6T9gcR8T1k9FHXWyu9owIIOxyYnflCyniMiw3YjieNLn2P+l0upRuOfFaUImtc8sOw+8BQKmMUGuBxpakGJq7+bdedl3mY8wLZVW7NwMG6s1c5PnceH3CQWePTYjkD6TvR7vId9FHN97G0RRyyyL8eY3wFHHPxwb7/yzwmwjvxqiBsZ4oyk81pbUQhJnekFe7MJRq+aVmqfjx4JQd1QwAQ3Jmk1XqKAuXuDr8GMLm4RirJgfvjtwJot0TbGLRYvZbtkWThtX1vpzuVO607qqeqPCpRm+LOdQO+xex9HSDDHFvRisb+76wMOkRyYUuXgZ4OvbQ==
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=Bd0gYslmxVxaNtIKuZKo8bLv1EI5vakmEGYj+uIaZIA=; b=GfANJfaf5Es+Wcmox1qXLqtGmmWcrbwD5RAtG5t/iC4wFTsPWcUUrXH6j0uutC5kkrOvPZ7iCx+36A6KsIfIgsvXJ+3UiHCp+cs/r8/02do54rEU20JUk1qBxyVe5bSfLxwQ80H8o4eJ8iwpdi2OzQcOOoE1jNtTJYkjbze54k5UlVQV/2jqnXZNYGCdB/REcC/AVhzQw7f98DQr4XvEnfOroXz6rUXgzjwtTuBR+KOSzTdYV04Y22xoo3v6heg3YAnoxuSmmY7TjWU+oc6UIaJbQVyv3c+gP9rRSt+AD/QdlyG1lSWgBiOl76K5YcsmE6xb/p4RebKgxoYEXFXHEA==
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.onmicrosoft.com; s=selector2-cisco-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=Bd0gYslmxVxaNtIKuZKo8bLv1EI5vakmEGYj+uIaZIA=; b=uuL/OD6luiiBmWKev8RTyx8pXvmiwF8yR4hotpBIuLFWJ06lRXndvwff4EGdbo67N/xQM0BPZPMCJkpEv5EwYAdeRXTy0BbXFUlHJXnqup6x+BpXE6OuU13lM4j3sRcOJEXe9Kb1S5BIL6zgjg+cMYg8L8icqyj33SY+8owvCVs=
Received: from BYAPR11MB2887.namprd11.prod.outlook.com (2603:10b6:a03:89::27) by BYAPR11MB2887.namprd11.prod.outlook.com (2603:10b6:a03:89::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3239.18; Fri, 31 Jul 2020 10:21:59 +0000
Received: from BYAPR11MB2887.namprd11.prod.outlook.com ([fe80::70a6:bb5b:16b:4f9b]) by BYAPR11MB2887.namprd11.prod.outlook.com ([fe80::70a6:bb5b:16b:4f9b%7]) with mapi id 15.20.3239.019; Fri, 31 Jul 2020 10:21:59 +0000
From: "Acee Lindem (acee)" <acee@cisco.com>
To: Qin Wu <bill.wu@huawei.com>, Kent Watsen <kent@watsen.net>, Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
CC: "Carlos Pignataro (cpignata)" <cpignata@cisco.com>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] rfc6991bis: loopback addresses
Thread-Index: AdZm1m5FyezcDLdYTMyRpVDDP44+0AALHaEA
Date: Fri, 31 Jul 2020 10:21:59 +0000
Message-ID: <54D4E247-7662-4710-BB98-728BF455FBE1@cisco.com>
References: <B8F9A780D330094D99AF023C5877DABAAD8A9FE3@dggeml511-mbs.china.huawei.com>
In-Reply-To: <B8F9A780D330094D99AF023C5877DABAAD8A9FE3@dggeml511-mbs.china.huawei.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
user-agent: Microsoft-MacOutlook/16.39.20071300
authentication-results: huawei.com; dkim=none (message not signed) header.d=none;huawei.com; dmarc=none action=none header.from=cisco.com;
x-originating-ip: [136.56.133.70]
x-ms-publictraffictype: Email
x-ms-office365-filtering-correlation-id: abb1e334-e0f5-4439-c6cd-08d8353b8f45
x-ms-traffictypediagnostic: BYAPR11MB2887:
x-ms-exchange-transport-forked: True
x-microsoft-antispam-prvs: <BYAPR11MB2887A7AD41B82C34442FF6E5C24E0@BYAPR11MB2887.namprd11.prod.outlook.com>
x-ms-oob-tlc-oobclassifiers: OLM:10000;
x-ms-exchange-senderadcheck: 1
x-microsoft-antispam: BCL:0;
x-microsoft-antispam-message-info: QWy5l7PM4w4WEsM6tJktR2Ep/FU+nz3O+dCoRJEyDrLwEMolRS/JdeL4U4nIyClMThT1OIx2LEfo3jbWbHlaxNk9UPQJ1Zb1l1gSJ15xqa5Onfd+NXnCGB6nAvHj7+u8bcOsOiFoxqJwGHw362PlGxlu0L10/HyDVv+A3IhLtu7GYFg9tKBX6nYnKC/oy6dBrDvHrJ/ZgcUDI6JPcTRo8ysFDIW45rD4M2d5/VOl7j0kq/gaI3MhuPfleuU6weDerdXWP6c1EBxhhKFmGzzBLmPYizcikJXgwFWODzmGJhnsYamfoRDJWjU0Bnlvgw8cQN+DPQ6gpYDc8tXnxzyVYsCW3nNXyrrXGaT7BWCVKFcM1nx16bHkSHqMq33DqVC04IjOxxpGrP+PdPD0OPcAjw==
x-forefront-antispam-report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:BYAPR11MB2887.namprd11.prod.outlook.com; PTR:; CAT:NONE; SFTY:; SFS:(4636009)(136003)(376002)(346002)(39860400002)(396003)(366004)(186003)(71200400001)(83380400001)(6486002)(316002)(8936002)(110136005)(54906003)(5660300002)(2906002)(966005)(66946007)(76116006)(66476007)(66556008)(64756008)(66446008)(8676002)(36756003)(2616005)(26005)(478600001)(86362001)(53546011)(91956017)(6512007)(6506007)(33656002)(4326008); DIR:OUT; SFP:1101;
x-ms-exchange-antispam-messagedata: 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
Content-Type: text/plain; charset="utf-8"
Content-ID: <BF757437DF4AC34E9ED63F997696A247@namprd11.prod.outlook.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-AuthSource: BYAPR11MB2887.namprd11.prod.outlook.com
X-MS-Exchange-CrossTenant-Network-Message-Id: abb1e334-e0f5-4439-c6cd-08d8353b8f45
X-MS-Exchange-CrossTenant-originalarrivaltime: 31 Jul 2020 10:21:59.4683 (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: K+c2jHBFwdLQ3SXSafU87CE6ho/pkriu2fatm3pOpx8kP2uuP3HjhpASrQTU0P7F
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BYAPR11MB2887
X-OriginatorOrg: cisco.com
X-Outbound-SMTP-Client: 173.36.7.11, xch-aln-001.cisco.com
X-Outbound-Node: rcdn-core-12.cisco.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/NQCgzpxd7W7qt2yFSnfRie-jp5s>
Subject: Re: [netmod] rfc6991bis: loopback addresses
X-BeenThere: netmod@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: NETMOD WG list <netmod.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/netmod>, <mailto:netmod-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/netmod/>
List-Post: <mailto:netmod@ietf.org>
List-Help: <mailto:netmod-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/netmod>, <mailto:netmod-request@ietf.org?subject=subscribe>
X-List-Received-Date: Fri, 31 Jul 2020 10:22:09 -0000

Hi Qin, 

On 7/30/20, 9:23 PM, "Qin Wu" <bill.wu@huawei.com> wrote:

    -----邮件原件-----
    发件人: netmod [mailto:netmod-bounces@ietf.org] 代表 Acee Lindem (acee)
    发送时间: 2020年7月31日 5:06
    收件人: Kent Watsen <kent@watsen.net>; Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
    抄送: Carlos Pignataro (cpignata) <cpignata@cisco.com>; netmod@ietf.org
    主题: Re: [netmod] rfc6991bis: loopback addresses

    Hi Kent,

    On 7/30/20, 4:55 PM, "netmod on behalf of Kent Watsen" <netmod-bounces@ietf.org on behalf of kent@watsen.net> wrote:


        > Thanks for pointing to the definitions in draft-nainar-mpls-lsp-ping-yang.
        > With that, your request is relatively clear now

        Looking at draft-nainar-mpls-lsp-ping-yang, the proposal is a “typedef” that constrains inet:ipv[46]-address so that it can only contain loopback address values.


        > and the question the WG
        > needs to answer is whether these types are common enough to warrant being
        > part of inet-types, i.e., are there any other places where these types
        > may be useful?

        I don’t think so, but I’m not a routing person.

    I wouldn't think that an internal loopback address would be widely used. In fact, I checked our Cisco native models for IOS-XE and there is no such definition. 

    [Qin]: I am not sure we are talking about loopback type or loopback address
    See section 2.4 in draft-ietf-netmod-intf-ext-yang-10, 3 type loopbacks are defined:
    1.Internal loopback
    2.Line loopback
    3.Loopback Connector
    3 types loopback can be classified into local loopback and remote loopback.
    I am not sure they are common, but we have some support for this. 

This is the loopback address type - not the loopback interface type. Look at draft-nainar-mpls-lsp-ping-yang (the draft being discussed in the Email thread). 

Thanks,
Acee

    Thanks,
    Acee


        > /js

        K.  // contributor
        _______________________________________________
        netmod mailing list
        netmod@ietf.org
        https://www.ietf.org/mailman/listinfo/netmod

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