On Wed, 28 Dec 2011 08:36:07 -0600, Charlie Hoffpauir
>Summary comments state that my connection should be good for streaming
>video.... However, I am unable to stream video.... I get many pauses
>for buffering. It makes it impossible to watch even a short U-tube
>video, much less attempt to watch a movie.
From the numbers you posted, I would expect streaming video to be just
fine. However, not all streaming video is created equal. Are you
watching highly compressed H.264 or MPEG4, or are you watching
uncompressed video? What application are you using to watch video? A
web browser, VLC, Winamp, WMP, etc?? Try to be specific.
>Is my service typical of WISP installations?
No. It's typical of Canopy wireless. Canopy uses a polling system,
which polls the client radios for traffic. The result is short bursts
of extremely fast traffic, with long delays in between. Comcast does
the same thing with their 1MBit/sec cable modem service, where you get
a 1 second burst of 10Mbits/sec followed by 10 seconds of nothing. If
you don't have your unspecified video media player set with an
adequately long buffer, it's going to stall.
>Is there some hardware problem that could cause actual performance to
>differ so greatly from what the tests indicate I should be able to
Dunno. You didn't mention anything about your hardware.
>Do I have a hardware or setup problem?
Dunno. Let's test. Find a nice fast computah and plug it into an
ethernet switch. Do the same with the computah you're using to watch
the videos. Unplug the Canopy wireless thing.
Download and install JPerf on both machines.
Setup the nice fast computah as a server and your video computah as
the test client. Run a benchmark, initially using TCP (not UDP). Are
you getting decent performance? For a 100BaseT connection, you should
see at least 60Mbits/sec. With some tuning, you can get it as high as
Now, try it with UDP, which is what all streaming video uses. It
should be slightly faster due to less overhead. Some buffer tuning in
Jperf may be needed.
If you download speeds is slow, erratic, unstable, or insane, you
probably have a computah or configuration problem. If the speed seems
fairly normal for an ethernet connection, it's not the computah.
Next, try watching a video with this arrangement. Put an MPEG4 video
(or whatever you can find) on the nice fast computah server. Setup
sharing, and watch the video on your computah. It should be just
fine. If not, there's a problem with the computah or setup.
Incidentally, whenever I get the same complaint from my customers, it
almost invariable is caused by additional traffic running in the
background. Things like file sharing programs (BitTorrent), Windoze
Update, and the kids in the house, are suitable culprits.
>I still have AT&T and from time to
>time, disconnect the WISP and use the AT&T.... and I get great
>performance from that setup! This makes me think my hardware is OK...
That's a good indication that it's not the computah or setup. Still I
think it might be interesting to verify it. For example, it might be
something as simple as a miswired or broken ethernet cable to the
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