One hears of some issues caused by it requesting DHCP every few
seconds, but I seem to have found something else.
I used to run Draytek AP800 access points, with the latest 1.03
firmware which they suggested fixes Apple IOS issues, but while it
appeared to help a little it wasn't reliable. I have now got rid of
the AP800s (due to suspect blank-SSID channels appearing) and went to
a single Cisco/Linksys WAP4410N.
Running the log on the WAP4410N access point, I see this kind of
activity
Feb 18 16:12:03 kernel: [SSID1234][34:51:C9:C4:DC:AE] Open
Authentication
Feb 18 16:12:03 kernel: [SSID1234][34:51:C9:C4:DC:AE] Associated
Feb 18 16:12:03 kernel: [][34:51:C9:C4:DC:AE] SUBTYPE_AUTH
Feb 18 16:12:03 kernel: [SSID1234][34:51:C9:C4:DC:AE] Open
Authentication
Feb 18 16:12:03 kernel: [][34:51:C9:C4:DC:AE] SUBTYPE_AUTH
Feb 18 16:12:03 kernel: [SSID1234][34:51:C9:C4:DC:AE] Open
Authentication
Feb 18 16:12:04 kernel: [][34:51:C9:C4:DC:AE] SUBTYPE_AUTH
Feb 18 16:12:04 kernel: [SSID1234][34:51:C9:C4:DC:AE] Open
Authentication
Feb 18 16:12:05 kernel: [][34:51:C9:C4:DC:AE] SUBTYPE_AUTH
Feb 18 16:12:05 kernel: [SSID1234][34:51:C9:C4:DC:AE] Open
Authentication
Feb 18 16:12:05 kernel: [SSID1234][34:51:C9:C4:DC:AE] Associated
Feb 18 16:12:17 kernel: [][34:51:C9:C4:DC:AE] SUBTYPE_AUTH
Feb 18 16:12:17 kernel: [SSID1234][34:51:C9:C4:DC:AE] Open
Authentication
Feb 18 16:12:18 kernel: [][34:51:C9:C4:DC:AE] SUBTYPE_AUTH
Feb 18 16:12:18 kernel: [SSID1234][34:51:C9:C4:DC:AE] Open
Authentication
Feb 18 16:12:18 kernel: [SSID1234][34:51:C9:C4:DC:AE] Associated
i.e. basically once per second the Ipad is re-authenticating. (Its mac
# ends with AE).
No wonder so many people have problems with these devices, on some
access points.
This is an Ipad2, latest IOS. 2nd one from the Apple shop doing the
same thing.
The above was taken during a continuous Vimeo playback. The playback
dies after about 20 minutes.
But it doesn't always do it. Yesterday I was doing just web browsing
and say just one association report. So "something" triggers it and
once it starts it just keeps doing it.
