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Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-initial-registry-14: (with DISCUSS and COMMENT)

Magnus Westerlund <magnus.westerlund@ericsson.com> Thu, 05 December 2019 13:14 UTC

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From: Magnus Westerlund <magnus.westerlund@ericsson.com>
To: "acm@research.att.com" <acm@research.att.com>, "iesg@ietf.org" <iesg@ietf.org>
CC: "draft-ietf-ippm-initial-registry@ietf.org" <draft-ietf-ippm-initial-registry@ietf.org>, "ietf@trammell.ch" <ietf@trammell.ch>, "ippm-chairs@ietf.org" <ippm-chairs@ietf.org>, "ippm@ietf.org" <ippm@ietf.org>
Thread-Topic: Magnus Westerlund's Discuss on draft-ietf-ippm-initial-registry-14: (with DISCUSS and COMMENT)
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Date: Thu, 05 Dec 2019 13:14:33 +0000
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Subject: Re: [ippm] Magnus Westerlund's Discuss on draft-ietf-ippm-initial-registry-14: (with DISCUSS and COMMENT)
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Hi Al,

> [acm]
> Please see the e-mail exchange on
> Éric Vyncke's DISCUSS (cleared)
> (now listed as a Comment to keep it in the record) where he raised identical
> issues, and we quickly proposed solutions for the working version of the
> text.
> 

So clarifying that one is to set flow ID to zero and not use any next headers for this specific metrics likely work in most cases. 

Do you agree that a measurement with varying flow ID or source ports over a measurement would be a different measurement that would then measure over the full set of potential paths that ECMP and similar mechanism may produce based on a specific set of source and destination IP address pair? 

Which measurements registrations are you implementing these changes into? 

Have we now created a situation where the text in the registry becomes crucial for correctly doing a measurement? Or was that already the case prior to this change? What I mean is that the references do not define the metric to the detail level and consistency that the IANA registry does.

Cheers

Magnus

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