[Lsr] draft-lin-lsr-flex-algo-metric-00

Peter Psenak <ppsenak@cisco.com> Thu, 24 March 2022 15:08 UTC

Return-Path: <ppsenak@cisco.com>
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 D09DE3A0FB0 for <lsr@ietfa.amsl.com>; Thu, 24 Mar 2022 08:08:57 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -14.609
X-Spam-Level:
X-Spam-Status: No, score=-14.609 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_HI=-5, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01, 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
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 2ypFxfIAi4pY for <lsr@ietfa.amsl.com>; Thu, 24 Mar 2022 08:08:53 -0700 (PDT)
Received: from aer-iport-4.cisco.com (aer-iport-4.cisco.com [173.38.203.54]) (using TLSv1.2 with cipher DHE-RSA-SEED-SHA (128/128 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id C2B423A0EAC for <lsr@ietf.org>; Thu, 24 Mar 2022 08:08:52 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=856; q=dns/txt; s=iport; t=1648134533; x=1649344133; h=message-id:date:mime-version:to:from:subject: content-transfer-encoding; bh=2eGM4rOUjZP/L0kC0C5L4UVc2vyXTS1AsLFd3bkKDfc=; b=WnXSNVJdDA7r1juB1DpOfpH2a2P+/3u9uYInEoCSCfSfmgGE3LlEHFGH sKKtSej8r2RDTB//vZzoyU77DrNgA0VefBivYTm9g1aLR2AI6Cn38H0uE e7oSupcp1pQO0Wt53BdnCFse0BH2AyeMMuIa1CNVLa6bwf5xJQRbjyqF9 Y=;
X-IPAS-Result: A0AaAQD/hzxilxbLJq1agQmBWgKDegEoEoUYiQakeIF8CwEBAQ9DBAEBiVYmNgcOAQIEAQEBAQMCAwEBAQEBAQMBAQUBAQECAQcEFAEBAQEBAQEBJAYMBUWFOwcnDEABEAGGGhVuCAImAksUDQgBAYMAgxetNXqBMYEBhGyDK4FkgRAsAYo2hFaBSUSBPIsggmUEmRaBM2UggRKhNJ54g1OEFZtJBg8FLoN0jDCGLZFvllsgpmKBaA0mLYEuMxoIGxWDJVAZD4k2hQOOOEADaQIGCwEBAwmMM4MyXQEB
IronPort-Data: A9a23:aXWFFK4eKpqoJczg2d3Q0gxRtI3GchMFZxGqfqrLsTDasY5as4F+v jRNUGCOOv/eZmTwLYtza4zlpE0Gu8eHz9FqQQQ/qSpjZn8b8sCt6fZ1gavT04J+CuWZESqLO u1HMoGowPgcFyOa/lH3WlTYhSEUOZugHtIQM8aZfHEpLeNYYH1500g7wLRl2tQAbeWRWmthh /uj+6UzB3f9s9JEGjp8B3Wr8U4HUFza4Vv0j3RmDRx5lAa2e0o9UPrzEZqMw07QGeG4KAIVq 9Hrl9lV9kuBl/sk50jMfrzTKiXmSZaKVeSCZ+Y/t6WK2nB/SiIOPqkTF/gBaWp0l2uzw+tB8 MpPsZWtUEQnB/iZ8Agde0Ew/yBWNKBcvbTAO3X66oqYzlbNdD3nxPAG4EMeZNJDvL0nRzsWr rpCcljhbTjb7w6y6KqjUeRqj8cLJ8jwN4RZsXZlpd3cJap5H8ySE/yXjTNe9CY3hJtXRsryX vIUeyZfV0ifYxlVBW5CXfrSm8/x1iWgLFW0smm9obEty2ne0AI316LiWOc5YfSDSN8Qn16fv H6D+W3lRBobL9eYjzGC9xpAm9MjgwvYWp8SOZ6kqMQ2u22r2W4XAQAPFlWC9KzRZlGFZ/pTL Ekd+ywLpKc09VC2QtSVYyBUsEJorTZHBIUNS7xSBBWlj/uLs1zAVwDoWxYYMIR+3PLaUwDGw bNgoj8IOdCNmOHFIZ5+3u7Kxd9XBcTzBTZTDcPjZVJUi+QPWKlp0nryoi9LScZZdOHdFzDq2 CytpyMjnbgVhsNj//zloQCf3Wr2/sOWFlFdCuDrsoSNs10RiGmNOtLA1LQnxaoowHuxFwPY5 yFUx6ByEshXUcjd/MByfAn9NOj5u6naWNEtqVVuBJImvy+84GKueJs43d2NDBkBDyrwQhewO BW7kVoIvPd7YSrxBYcqMt3ZNijf5fW5fTgTfquMPoQmj1kYXFLvwRyCkmbMgDG3zBl9y/1X1 FXyWZ/EMEv2wJ9PlFKeL9rxG5dyrszi7Qs/nazG8ik=
IronPort-HdrOrdr: A9a23:AJukXanqRqcBSh1u7z6XqifwQ8npDfIj3DAbv31ZSRFFG/Fw5P rBoB19726QtN9xYgBDpTnuAsS9qB/nlaKdgrN8AV7BZmPbUQKTRekI0WKI+UyCJ8SRzI9gPO tbHJSXzLbLfD9HZQGQ2njdL+od
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-AV: E=Sophos;i="5.90,207,1643673600"; d="scan'208";a="47649815"
Received: from aer-iport-nat.cisco.com (HELO aer-core-3.cisco.com) ([173.38.203.22]) by aer-iport-4.cisco.com with ESMTP/TLS/DHE-RSA-SEED-SHA; 24 Mar 2022 15:08:50 +0000
Received: from [10.147.24.24] ([10.147.24.24]) by aer-core-3.cisco.com (8.15.2/8.15.2) with ESMTP id 22OF8oGu001054 for <lsr@ietf.org>; Thu, 24 Mar 2022 15:08:50 GMT
Message-ID: <f90ba8ec-3a63-b23a-e8eb-a392f2faf699@cisco.com>
Date: Thu, 24 Mar 2022 16:08:50 +0100
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.7.0
Content-Language: en-US
To: "lsr@ietf.org" <lsr@ietf.org>
From: Peter Psenak <ppsenak@cisco.com>
Content-Type: text/plain; charset="UTF-8"; format="flowed"
Content-Transfer-Encoding: 7bit
X-Outbound-SMTP-Client: 10.147.24.24, [10.147.24.24]
X-Outbound-Node: aer-core-3.cisco.com
Archived-At: <https://mailarchive.ietf.org/arch/msg/lsr/mYrcyEms2dEiDZ9nwnAWplHuQaw>
Subject: [Lsr] draft-lin-lsr-flex-algo-metric-00
X-BeenThere: lsr@ietf.org
X-Mailman-Version: 2.1.29
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: Thu, 24 Mar 2022 15:08:58 -0000

Hi,

as I was unable to make my comments during the presentation, let me put 
them here:


When we started with the flex-algo work, there has been a lengthy 
discussion on why not to use the multi-topology (MT) instead. We always 
wanted flex-algo to be light weight and as a result easy to deploy and 
manage. I believe that was one of the reasons why flex-algo has been 
successfully deployed. We do not want to loose that very property of the 
flex-algo architecture.

What you are proposing is what MT was invented for and we do not want 
flex-algo to become a new version of MT.

You have two ways to solve your problem:

a) use MT

b) if you want to solve your problem with flex-algo, please use what 
already exists in flex-algo. Please look at 
draft-ietf-lsr-flex-algo-bw-con as others have pointed out.


thanks,
Peter