Re: [Lsr] New draft on Flex-Algorithm Bandwidth Constraints

Aijun Wang <wangaijun@tsinghua.org.cn> Thu, 04 March 2021 14:23 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 B50173A0BA5 for <lsr@ietfa.amsl.com>; Thu, 4 Mar 2021 06:23:27 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.919
X-Spam-Level:
X-Spam-Status: No, score=-1.919 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=unavailable 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 zj7XdZ0msUgP for <lsr@ietfa.amsl.com>; Thu, 4 Mar 2021 06:23:25 -0800 (PST)
Received: from mail-m17638.qiye.163.com (mail-m17638.qiye.163.com [59.111.176.38]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 155EB3A0B9F for <lsr@ietf.org>; Thu, 4 Mar 2021 06:23:19 -0800 (PST)
Received: from [240.0.0.1] (unknown [106.121.128.50]) by mail-m17638.qiye.163.com (Hmail) with ESMTPA id AE6A61C0284; Thu, 4 Mar 2021 22:23:15 +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)
Message-Id: <4E0301A4-941F-4FD3-8B66-823BC269D00E@tsinghua.org.cn>
Date: Thu, 4 Mar 2021 22:23:14 +0800
Cc: Robert Raszuk <robert@raszuk.net>, Gyan Mishra <hayabusagsm@gmail.com>, Rajesh M <mrajesh@juniper.net>, Shraddha Hegde <shraddha@juniper.net>, DECRAENE Bruno IMT/OLN <bruno.decraene@orange.com>, Tony Li <tony.li@tony.li>, lsr@ietf.org, William Britto A J <bwilliam=40juniper.net@dmarc.ietf.org>
To: Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org>
X-Mailer: iPhone Mail (18D52)
X-HM-Spam-Status: e1kfGhgUHx5ZQUtXWQgYFAkeWUFZS1VLWVdZKFlBSkxLS0o3V1ktWUFJV1 kPCRoVCBIfWUFZGkpLQ09PTU9LQh9LVkpNSk9DTUxMQk5DQ0lVEwETFhoSFyQUDg9ZV1kWGg8SFR 0UWUFZT0tIVUpKS0NISFVLWQY+
X-HM-Sender-Digest: e1kMHhlZQR0aFwgeV1kSHx4VD1lBWUc6NxQ6Qjo6ND8NIQszUTctSx8Q KQgKCx5VSlVKTUpPQ01MTEJNSUhDVTMWGhIXVQwaFRwaEhEOFTsPCBIVHBMOGlUUCRxVGBVFWVdZ EgtZQVlKS01VSklKVUpJQ1VOS1lXWQgBWUFJTkhMNwY+
X-HM-Tid: 0a77fd9f0f07d993kuwsae6a61c0284
Archived-At: <https://mailarchive.ietf.org/arch/msg/lsr/bW2pr5uaFxP2n69Ns1eoeRHIbX0>
Subject: Re: [Lsr] New draft on Flex-Algorithm Bandwidth Constraints
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, 04 Mar 2021 14:23:28 -0000

Hi, Peter:

Whatever the interval is set, I think the measured value is “unpredictable parameter” and should not be used as the input factors for IGP SPF calculations by the network devices.
Or else, the overall behavior of the network will be uncontrollable.
For the delay aware application, we prefer to using the controller to calculate and program the network devices, to let such applications traffic follow one optimized path, to meet the application’s requirements.

Aijun Wang
China Telecom

> On Mar 4, 2021, at 21:30, Peter Psenak <ppsenak=40cisco.com@dmarc.ietf.org> wrote:
> 
> On 04/03/2021 14:28, Robert Raszuk wrote:
>>> Is it minimum ever, is it min of the year, month, week, day ... etc
>>   https://tools.ietf.org/html/rfc8570#section-4.2
>>   Peter
>> Maybe it is just me but in section 4.2 I see NOTHING about how often that delay should be measured which was the point above.
> 
> it says it clearly - "over a configurable interval"
> 
> Peter
> 
>> Thx,
>> R.
> 
> _______________________________________________
> Lsr mailing list
> Lsr@ietf.org
> https://www.ietf.org/mailman/listinfo/lsr