All things related to multicast

["Kevin C. Almeroth" <>]

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Date: Thu, 13 Mar 2003 09:23:07 +1100
To: Giuliano Cardozo Medalha 
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From: Markus Buchhorn 
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Subject: Re: Jitter Measurement
Cc: Marshall Eubanks 
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At 19:16 12/03/2003 -0300, Giuliano Cardozo Medalha wrote:
>The problem is that I cannot propagate multicast streaming yet across my ISP.

That's Ok - you can still use rtp/rtcp-based clients to measure jitter for 
unicast traffic. As long as the client returns meaningful jitter numbers, 
which I'm not always convinced about. iperf is a nice tool, and I'd trust it 
more :-)

If you're doing videoconf test, are you using H.323 clients? Many of them 
(e.g. the ViaVideo) report rtp-traffic jitter in their 'stats' windows.

I can't check right now - does vic do graphs of jitter? It graphs pretty much 
everything else. It may vary between the openmash and ucl versions of vic. 
Just run vic in unicast mode.

Cheers,
        Markus


Markus Buchhorn, ANU Internet Futures Project,        | Ph: +61 2 61258810
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