Ingo

Hi guys.

Same Problem and maybe a few interesting Information here.
First my Problem.

At normal usage Safari, Mail, even uploading big Data over hours to WeTransfer i have no Problems.
But i always have Problems with Airplay Musik from Iphone (IOS 8.1.1) and Laptop (Yosemite 10.10.1) to my AirPort Express.

Same Problem forwarding the Sound from my AppleTv to my Airport Express.
So even there is one more problem than only OS X and IOS ?

So I installed NetSpot and saw this dropouts.
https://www.dropbox.com/s/c9waksiedjapx9y/Bildschirmfoto%202014-11-28%20um%2017.55.06.png?dl=0

But then realized that i don’t get them if i don’t look at NetSpot.
For example here i looked a website for a time. NetSpot was open but not on Focus.
Safari was over it. Then the Graph looks like this.
https://www.dropbox.com/s/5m1gkjyz9907xsp/Bildschirmfoto%202014-11-28%20um%2017.54.50.png?dl=0

This very interesting Article describes the Problem a bit deeper!
https://medium.com/@mariociabarra/wifried-ios-8-wifi-performance-issues-3029a164ce94
So I thought there has to be a connection and tried to ping during NetSpot.
Verry interesting Result.

Pinging my own Router without Netspot!
https://www.dropbox.com/s/0bckpuvbf64fv1y/Bildschirmfoto%202014-11-28%20um%2017.41.44.png?dl=0

and With Netspot!!
https://www.dropbox.com/s/cp8qq0o30e0s6p0/Bildschirmfoto%202014-11-28%20um%2017.44.08.png?dl=0

So it confirmed what was written in the article.
And just that you get it right, Netspot is not the reason for the Dropoffs.
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Perform a speed test (many apps to choose from) and simply pull open the Control Center. This will cause the discoveryd process to browse and advertise services over your WiFi interface.
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So every Program that initializes this discovery process will cause this problem and
Netspot probably does this too. Would make sense because it Updates the WLAN List
all the time.

The here described workaround didn’t work for me.

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Either way, you can fix your Yosemite WiFi issues, at the cost of disabling AWDL and AirDrop, by typing the following command at the OSX terminal:

sudo ifconfig awdl0 down
And vice versa to restore AirDrop and AWDL (and the WiFi issues)

sudo ifconfig awdl0 up
For clarification: that’s “a w d (lowercase L) (number zero)”
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greets
Ingo