IETF Logo Mail Archive

Re: [Lsr] Working Group Last Call for draft-ietf-lsr-ip-flexalgo-04 - "IGP Flexible Algorithms (Flex-Algorithm) In IP Networks"

Aijun Wang <wangaijun@tsinghua.org.cn> Tue, 03 May 2022 08:00 UTC

Return-Path: <wangaijun@tsinghua.org.cn>
X-Original-To: lsr@ietfa.amsl.com
Delivered-To: lsr@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 1729AC15949A; Tue, 3 May 2022 01:00:05 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.897
X-Spam-Level:
X-Spam-Status: No, score=-1.897 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001, URIBL_DBL_BLOCKED_OPENDNS=0.001, URIBL_ZEN_BLOCKED_OPENDNS=0.001] autolearn=ham autolearn_force=no
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 OJszgIAjBPjZ; Tue, 3 May 2022 01:00:03 -0700 (PDT)
Received: from mail-m17638.qiye.163.com (mail-m17638.qiye.163.com [59.111.176.38]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 7F4B1C159495; Tue, 3 May 2022 01:00:02 -0700 (PDT)
Received: from smtpclient.apple (unknown [221.223.97.226]) by mail-m17638.qiye.163.com (Hmail) with ESMTPA id 669F31C05CE; Tue, 3 May 2022 15:59:59 +0800 (CST)
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: quoted-printable
From: Aijun Wang <wangaijun@tsinghua.org.cn>
Mime-Version: 1.0 (1.0)
Date: Tue, 03 May 2022 15:59:58 +0800
Message-Id: <2D64A7BA-2F56-43F1-918B-46EB9803E7B9@tsinghua.org.cn>
References: <8dc8cb30-d001-6a09-817e-7aa8950f5385@cisco.com>
Cc: "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>, lsr@ietf.org, draft-ietf-lsr-ip-flexalgo@ietf.org
In-Reply-To: <8dc8cb30-d001-6a09-817e-7aa8950f5385@cisco.com>
To: Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org>
X-Mailer: iPhone Mail (19E258)
X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgPGg8OCBgUHx5ZQUlOS1dZCBgUCR5ZQVlLVUtZV1 kWDxoPAgseWUFZKDYvK1lXWShZQUpMS0tKN1dZLVlBSVdZDwkaFQgSH1lBWUMeTR1WQ0MaTEsdTx 8YH0hCVRMBExYaEhckFA4PWVdZFhoPEhUdFFlBWU9LSFVKSktITUpVS1kG
X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6MFE6LSo5Cz0yHBQsIzhKIgkh ORNPCRdVSlVKTU5KTk1PTEJCTUNCVTMWGhIXVQwaFRwaEhEOFTsPCBIVHBMOGlUUCRxVGBVFWVdZ EgtZQVlJSUpVSUlIVUJMVUlJTVlXWQgBWUFIQ0pLNwY+
X-HM-Tid: 0a8088eee5c2d993kuws669f31c05ce
Archived-At: <https://mailarchive.ietf.org/arch/msg/lsr/FoFw-c9DPN9SmrKlLHCVHHoYDz8>
Subject: Re: [Lsr] Working Group Last Call for draft-ietf-lsr-ip-flexalgo-04 - "IGP Flexible Algorithms (Flex-Algorithm) In IP Networks"
X-BeenThere: lsr@ietf.org
X-Mailman-Version: 2.1.34
Precedence: list
List-Id: Link State Routing Working Group <lsr.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/lsr>, <mailto:lsr-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/lsr/>
List-Post: <mailto:lsr@ietf.org>
List-Help: <mailto:lsr-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/lsr>, <mailto:lsr-request@ietf.org?subject=subscribe>
X-List-Received-Date: Tue, 03 May 2022 08:00:05 -0000

Hi, Peter:
The definition of FAPM for IS-IS and OSPF doesn’t prevent from it is used for the intra-area prefixes.
If we advertise the different loopback addresses via the FAPM, associate them to different Flex-Algo and related metrics, and does not allocate the MPLS SID, we can achieve the IP-Flex effect then.
So, what’s the additional value of the IP-Flexalgo draft then?

Aijun Wang
China Telecom

> On May 3, 2022, at 14:46, Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org> wrote:
> 
> Aijun,
> 
>> On 03/05/2022 00:47, Aijun Wang wrote:
>> Hi, Acee:
>> The questions raised at https://mailarchive.ietf.org/arch/msg/lsr/RlHphXCwxMbgGvcBV_m24xiDzS0/ <https://mailarchive.ietf.org/arch/msg/lsr/RlHphXCwxMbgGvcBV_m24xiDzS0/> has not been answered.
> 
> IS-IS Flexible Algorithm Prefix Metric Sub-TLV” and “OSPF Flexible Algorithm Prefix Metric Sub-TLV” are defined for advertisement of algorithm specific metric for inter-area inter-AS prefixes for SR-MPLS data-plane.
> 
> SR MPLS and IP are independent data-planes used for flex-algo. We can not mix their metric.
> 
> thanks,
> Peter
> 
>> Aijun Wang
>> China Telecom
>>>> On May 2, 2022, at 23:00, Acee Lindem (acee) <acee=40cisco.com@dmarc.ietf.org> wrote:
>>> 
>>> The WG last call has completed. We will submit an updated version of the document for publication with the terminology changes based on the discussion amongst the authors, Ketan, Robert, Gyan, and others.
>>> 
>>> Thanks,
>>> Acee
>>> 
>>> *From: *Lsr <lsr-bounces@ietf.org> on behalf of "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>
>>> *Date: *Thursday, April 7, 2022 at 3:07 PM
>>> *To: *"lsr@ietf.org" <lsr@ietf.org>
>>> *Cc: *"draft-ietf-lsr-ip-flexalgo@ietf.org" <draft-ietf-lsr-ip-flexalgo@ietf.org>
>>> *Subject: *[Lsr] Working Group Last Call for draft-ietf-lsr-ip-flexalgo-04 - "IGP Flexible Algorithms (Flex-Algorithm) In IP Networks"
>>> 
>>> This begins a WG last call for draft-ietf-lsr-ip-flexalgo-04.  The draft had a lot of support and discussion initially and has been stable for some time. Please review and send your comments, support, or objection to this list before 12 AM UTC on April 22^nd , 2022.
>>> 
>>> Thanks,
>>> Acee
>>> 
>>> _______________________________________________
>>> Lsr mailing list
>>> Lsr@ietf.org
>>> https://www.ietf.org/mailman/listinfo/lsr
>

v2.23.0 | Report a Bug | By Email