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Re: [ippm] New Version Notification for draft-ahuang-ippm-dex-timestamp-ext-00.txt

Haoyu Song <haoyu.song@futurewei.com> Wed, 15 February 2023 17:48 UTC

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From: Haoyu Song <haoyu.song@futurewei.com>
To: Alex Huang Feng <alex.huang-feng@insa-lyon.fr>, "ippm@ietf.org" <ippm@ietf.org>
CC: Pierre Francois <pierre.francois@insa-lyon.fr>
Thread-Topic: [ippm] New Version Notification for draft-ahuang-ippm-dex-timestamp-ext-00.txt
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Date: Wed, 15 Feb 2023 17:47:49 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/ippm/rPSjVeaYVN5r6k8IK_1YAU1aUHc>
Subject: Re: [ippm] New Version Notification for draft-ahuang-ippm-dex-timestamp-ext-00.txt
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Hi Alex,

This method allows the direct delay measurement in data plane which could be useful for some applications. The extension is also simple and straightforward. 
I have just one concern: the timestamp seconds and fraction are defined as two optional field and the timestamp seconds could be the only field used. However, I don't think it would be useful for delay measurement if only the seconds appears. So maybe it's more reasonable to consider them both as just one timestamp field and save a flag bit.

Thanks,
Haoyu

-----Original Message-----
From: ippm <ippm-bounces@ietf.org> On Behalf Of Alex Huang Feng
Sent: Wednesday, February 15, 2023 3:30 AM
To: ippm@ietf.org
Cc: Pierre Francois <pierre.francois@insa-lyon.fr>
Subject: Re: [ippm] New Version Notification for draft-ahuang-ippm-dex-timestamp-ext-00.txt

Dear IPPM WG,

I would like to present this draft which addresses a missing timestamp in the IOAM Direct Export (DEX) option header.

This timestamp extension allows computing the delay between the encapsulation node and the transit or decapsulation node in IOAM DEX Option.

On behalf of the authors, I would like to request your feedback on this draft.

Cheers,
Alex


> On 15 Feb 2023, at 12:27, internet-drafts@ietf.org wrote:
> 
> 
> A new version of I-D, draft-ahuang-ippm-dex-timestamp-ext-00.txt
> has been successfully submitted by Alex Huang Feng and posted to the 
> IETF repository.
> 
> Name:		draft-ahuang-ippm-dex-timestamp-ext
> Revision:	00
> Title:		Timestamp extension for In Situ Operations, Administration, and Maintenance (IOAM) Direct Export
> Document date:	2023-02-15
> Group:		Individual Submission
> Pages:		6
> URL:            https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.ietf.org%2Farchive%2Fid%2Fdraft-ahuang-ippm-dex-timestamp-ext-00.txt&data=05%7C01%7Chaoyu.song%40futurewei.com%7Cfd4793f6908340b88ac308db0f47ff29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C638120574175820201%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=2iaKat5H9LbLvGCML2Cwrgr14pCivah5y4mH%2BNIgKkA%3D&reserved=0
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> Htmlized:       https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf.org%2Fdoc%2Fhtml%2Fdraft-ahuang-ippm-dex-timestamp-ext&data=05%7C01%7Chaoyu.song%40futurewei.com%7Cfd4793f6908340b88ac308db0f47ff29%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C638120574175820201%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=TOrh708zz%2FeD83zHmXRbNvU6AZiTviM9cMtoVa8GFx8%3D&reserved=0
> 
> 
> Abstract:
>   This document extends the In Situ Operations, Administration, and
>   Maintenance (IOAM) Direct Export option type to support timestamping
>   by adding and defining two optional timestamp fields and
>   corresponding flags.
> 
> 
> 
> 
> 
> The IETF Secretariat
> 
> 

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