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Re: Throughput riddle



On Sun, 20 Mar 2016 14:43:00 +0100
arian <debian@semioptimal.net> wrote:

> 
> > Here's the part that baffles me - these are with the laptop connected
> > to the router wirelessly:
> > 
> > Laptop - router:	~11.8 Mbps
> > Laptop - NAS:		~14.7 Mbps
> > 
> > Once again, these numbers vary widely, but are in line with the laptop
> > - router numbers.
> > 
> > But here's the kicker: Ookla's speedtest (run on the laptop with
> > speedtest-cli) shows 29.01/5.89 (d/u), and this is fairly consistent.
> 
> Just checking: you're not runnging iperf bidriectional, right? WiFi is half duplex, in general for radio it's extremely difficult to achieve full duplex when you don't have separate uplink/downlink carriers.
> In that case you need to double your figures, and you'd get something compatible with the speedtest results.

No - I've been using the default: 'iperf -c hostxxxx' on laptop, 'iperf
-sD' on router, NAS.

Actually, this morning I've been getting about 17-20 Mbps between the
laptop and NAS. I tried bidirectional testing ('iperf -d -c hostxxxx',
and the results actually remained constant.

I'm still getting only about 13 Mbps between the laptop and router.

> regards, arian

Celejar


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