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

Aijun Wang <wangaijun@tsinghua.org.cn> Thu, 04 March 2021 14:23 UTC

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From: Aijun Wang <wangaijun@tsinghua.org.cn>
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Date: Thu, 04 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>
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Subject: Re: [Lsr] New draft on Flex-Algorithm Bandwidth Constraints
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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.
> 
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