If client has video turned off then the upload is similar to a VoIP call.
Apparently the downlink can vary quite a bit depending on what the
presenter is doing. Like audio only vs screen share vs video. On top
of that the video can auto train. So yeah lots of variance.
On 9/2/2020 2:59 PM, Ken Hohhof wrote:
In theory the upstream bandwidth could be a problem, because Zoom says
they need a little over 1 Mbps both directions.
What I’ve actually seen is adults working from home typically have a
steady 1M symmetric during a video conference. School kids on the
other hand are all over the map. The traffic isn’t constant, and the
upstream seems a lot less. I think it may depend on how they have it
set up, like do you see the whole class in thumbnails. And the
upstream may only go to a big number when the teacher calls on that
student?
One thing’s for sure, you get a house with WiFi coverage issues and a
whole bunch of Zoomers, and they’re going to be calling and bugging
the crap out of us. It’s similar to gamers who call saying things
like it’s freezing or lagging or there’s audio but no video or one kid
is fine but the other can’t get on. And it’s an existential crisis
that has to be fixed right now this nanosecond and you hear the kids
yelling at the mom in the background. Some problems are people on the
lowest speed plan with insufficient upstream, but others I’m not sure
what their problem is. One is saying only one of their kids can Zoom
but their neighbor on our service and the same speed plan has 4
Zooming no problem. Does that mean they go to the same school, are in
the same grade, have the same teacher? Probably not. And could it be
WiFi issues? Probably.
*From:* AF <af-boun...@af.afmug.com> *On Behalf Of *Steve Jones
*Sent:* Wednesday, September 2, 2020 1:41 PM
*To:* AnimalFarm Microwave Users Group <af@af.afmug.com>
*Subject:* Re: [AFMUG] Zoom QoS
we have one house with 5 remote learners, other than when theres a
file getting uploaded, even on a small connection the mother ive been
communicating with has said its been working flawlessly. is zoom
related to skype in its back end?
On Wed, Sep 2, 2020 at 1:33 PM Adam Moffett <dmmoff...@gmail.com
<mailto:dmmoff...@gmail.com>> wrote:
Porn isn't zoom.....at least not yet. Maybe that's the next new
normal.
Netflix also isn't zoom.
So if 5 kids using Zoom on a 3mbps connection is the problem then
what you say is true. If it's 1 or 2 kids competing with other
households' Netflix and Chill then QoS can address that.
On 9/2/2020 2:19 PM, Ken Hohhof wrote:
If everything is Zoom, and you prioritize Zoom, you prioritize
everything. It’s like everyone is a winner, but if nobody
loses, what’s the point?
I have observed that Zoom seems to use a little bit of TCP
presumably a control channel and mostly UDP I think it’s on
something like port 8801. Not sure if you have 3 or 4
students in the same house and maybe 1 or 2 adults all
Zooming, if additional ports get used, kind of like VoIP using
5060, 5061, 5062, etc.
*From:* AF <af-boun...@af.afmug.com>
<mailto:af-boun...@af.afmug.com> *On Behalf Of *Adam Moffett
*Sent:* Wednesday, September 2, 2020 12:25 PM
*To:* af@af.afmug.com <mailto:af@af.afmug.com>
*Subject:* Re: [AFMUG] Zoom QoS
Apparently they already set DSCP values to 56 for the audio
and 40 for the video.
Trusting DSCP from the Internet carries other dangers though
(like Apple thinks iPhone software updates need expedited
forwarding).
On 9/2/2020 1:18 PM, Steve Jones wrote:
zoom and google classroom are surprisingly resilient on
their own. i dont know if its a school setting, or a
default, but it seems it auto scales. I would actually be
concerned about prioritizing it causing it to ramp up
resolutions, etc and cause more net demand. unless maybe
find the absolute minimum requirements and QOS that as the min
On Wed, Sep 2, 2020 at 12:04 PM Adam Moffett
<dmmoff...@gmail.com <mailto:dmmoff...@gmail.com>> wrote:
Is the a simple way to classify Zoom traffic for
prioritizing it? Like
a layer7 match or matching a certain IP block.
School is restarting soon (online) and I'm thinking
this might be a hot
item.
-Adam
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