Re: [Dyncast] CAN BoF issues and the next steps

Luigi IANNONE <luigi.iannone@huawei.com> Wed, 13 April 2022 06:52 UTC

Return-Path: <luigi.iannone@huawei.com>
X-Original-To: dyncast@ietfa.amsl.com
Delivered-To: dyncast@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id BECB63A1D93 for <dyncast@ietfa.amsl.com>; Tue, 12 Apr 2022 23:52:37 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.908
X-Spam-Level:
X-Spam-Status: No, score=-1.908 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01] autolearn=ham autolearn_force=no
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 O-PBf4s99w4T for <dyncast@ietfa.amsl.com>; Tue, 12 Apr 2022 23:52:36 -0700 (PDT)
Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 258603A19AA for <dyncast@ietf.org>; Tue, 12 Apr 2022 23:52:36 -0700 (PDT)
Received: from fraeml738-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KdYBM263Nz67lBv; Wed, 13 Apr 2022 14:50:19 +0800 (CST)
Received: from lhreml739-chm.china.huawei.com (10.201.108.189) by fraeml738-chm.china.huawei.com (10.206.15.219) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 13 Apr 2022 08:52:31 +0200
Received: from lhreml737-chm.china.huawei.com (10.201.108.187) by lhreml739-chm.china.huawei.com (10.201.108.189) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Wed, 13 Apr 2022 07:52:31 +0100
Received: from lhreml737-chm.china.huawei.com ([10.201.108.187]) by lhreml737-chm.china.huawei.com ([10.201.108.187]) with mapi id 15.01.2375.024; Wed, 13 Apr 2022 07:52:31 +0100
From: Luigi IANNONE <luigi.iannone@huawei.com>
To: Aijun Wang <wangaijun@tsinghua.org.cn>, "'Joel M. Halpern'" <jmh@joelhalpern.com>, "liupengyjy@chinamobile.com" <liupengyjy@chinamobile.com>, 'dyncast' <dyncast@ietf.org>
Thread-Topic: [Dyncast] CAN BoF issues and the next steps
Thread-Index: AQHYTW3xnVNpsK0HWkKBJh9YjDS+76zql24AgAAuOT7///GIgIAAxEeAgABe92CAATz9gIAAU34g
Date: Wed, 13 Apr 2022 06:52:30 +0000
Message-ID: <84b1c7689a9a4bdabd89d9dabf70dfa6@huawei.com>
References: <2022041114360459722023@chinamobile.com> <29752325-4d93-271d-a0f1-e874575dca9b@joelhalpern.com> <2022041122304706741797@chinamobile.com> <5c189bc0-0569-e2f9-54b3-1bb41335ae21@joelhalpern.com> <008f01d84e13$8b5db8f0$a2192ad0$@tsinghua.org.cn> <d8fd1f2624b743698ed7b9ba390299f3@huawei.com> <00ed01d84ee1$859b5f70$90d21e50$@tsinghua.org.cn>
In-Reply-To: <00ed01d84ee1$859b5f70$90d21e50$@tsinghua.org.cn>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [10.221.204.19]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-CFilter-Loop: Reflected
Archived-At: <https://mailarchive.ietf.org/arch/msg/dyncast/NLxZa8ozpnITNL-cyyOqnbGV5sk>
Subject: Re: [Dyncast] CAN BoF issues and the next steps
X-BeenThere: dyncast@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Dynamic Anycast <dyncast.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dyncast>, <mailto:dyncast-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/dyncast/>
List-Post: <mailto:dyncast@ietf.org>
List-Help: <mailto:dyncast-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dyncast>, <mailto:dyncast-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 13 Apr 2022 06:52:38 -0000

Hi Aijun,

> 
> Hi, Luigi:
> Why only the ingress need such decision? I think all the routers in-path need
> such information(routing metric +compute metric), to achieve the optimal
> "instance selection".

Not necessarily. If a tunnel/overlay is used only ingress and egress must be aware of the selection.

Ciao

L.