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Re: [ippm] draft-baillargeon-ippm-twamp-value-added-octets

Xiangsong Cui <Xiangsong.Cui@huawei.com> Wed, 04 May 2011 02:08 UTC

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Date: Wed, 04 May 2011 10:08:38 +0800
From: Xiangsong Cui <Xiangsong.Cui@huawei.com>
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To: 'Christofer Flinta' <christofer.flinta@ericsson.com>, 'Henk Uijterwaal' <henk@uijterwaal.nl>, ippm@ietf.org
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Subject: Re: [ippm] draft-baillargeon-ippm-twamp-value-added-octets
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> This draft is trying to provide a means for measuring the capacity in both
the
> forward and reverse directions as two separate measurements. This is
similar
> to the current capabilities of TWAMP, where e.g. delay and packet loss can
be
> measured separately in both directions. 

If you are referring to one-way metric, e.g. one-way packet loss, how can
you get the one-way metric by the two-way test?
That said, how can the session-sender get to know whether the packet is lost
before or after the session-reflector?

Regards,
Xiangsong

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