#21284: EA3500 (Audi Kirkwood) wifi unstable.
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Reporter: anonymous | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone: Designated Driver (Trunk)
Component: kernel | Version: Trunk
Resolution: | Keywords:
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Comment (by lordgilman):
Ok, did some more testing with stock hostapd but wpa_group_rekey turned
down to 15 seconds. I classified the rekeys as bad (where it exhausts all
of the rekey timeouts and disconnects), good (rekeys on the first try) and
slow (takes more than one rekey).
The baseline:
Bad: 5 (12%)
Good: 18 (44%)
Slow: 18 (44%)
While doing this test I noticed that it seemed like a timeout that was
going to be bad (disconnect) might turn into a slow rekey if data was sent
over the network. So I tried the test again, but with video streaming on
the phone so there would be constant data being sent:
Constant data:
Bad: 0
Good: 25 (77%)
Slow: 9 (26%)
So a much better improvement. Seems to be related to some sort of
buffering on the phone - something about the AP + the phone is making it
aggressively buffer data and not wake up to respond to these EAPOLs. I
might try to see if disconnects keep happening without any WPA encryption
at all next. I did dig around in the offending phone and there isn't any
sort of low power or power saving functionality enabled that I could see
causing it to buffer like this.
--
Ticket URL: <https://dev.openwrt.org/ticket/21284#comment:40>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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