[PWE3] PW performance measurements using VCCV
Sasha Vainshtein <Sasha@AXERRA.com> Thu, 02 March 2006 12:20 UTC
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From: Sasha Vainshtein <Sasha@AXERRA.com>
To: "Yaakov Stein (E-mail)" <yaakov_s@rad.com>, "'tnadeau@cisco.com'" <tnadeau@cisco.com>
Date: Thu, 02 Mar 2006 14:16:24 +0200
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Cc: "PWE3 WG (E-mail)" <pwe3@ietf.org>
Subject: [PWE3] PW performance measurements using VCCV
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Yaakov, Tom and all, I've read the just posted draft-nadeau-pwe3-perf-timing-measure-00.txt. and I see that, among other things, you have proposed measurement of PW packet loss rate (PLR) using a new format of VCCV packets (to be defined). In this regard I would appreciate your opinion on relevance of the problems raised in the (now expired but still available) draft-rosen-pwe3-congestion-01.txt regarding ability to measure packet loss using "modified VCCV packets" (Section 2) to your current proposal. Of course, that draft has dealt with a different problem: PW congestion detection and not PW PLR measurement. On the other hand, these two problems look to me reasonably similar; and one may be more or less dificult than the other depending on the desired degree of accuracy of the PLR measurements and time intervals for which it is measured. IMHO other proposals in the draft (measurement of the PW packet delay and PW packet delay variation using VCCV) also require specification of the desired degree(s) of accuracy. E.g., I do not see how to select the most appropriate timestamping format if the desired accuracy of these measurements is not specified. Hopefully these notes will be useful. Regards, Sasha _______________________________________________ pwe3 mailing list pwe3@ietf.org https://www1.ietf.org/mailman/listinfo/pwe3
- [PWE3] PW performance measurements using VCCV Sasha Vainshtein