Hi WIRELESS-LAN Educausers,

For a number of months, our help desk has been fielding complaints
from Chromebook owners who have been reporting difficulty connecting
to our .1X SSID.

Packet captures show the Chromebooks will go so far as to
DHCPDISCOVER, but will not respond to a DHCPOFFER.  After several
retries, these devices will eventually complete the DHCP process, at
which point the Chromebook is online.  This can sometimes take more
than a minute.

I have not been able to reliably reproduce this issue. Sometimes it
works right away, sometimes it doesn't.  I haven't received reports of
similar issues with non-Chromebooks.

I found that if I force the SSID to TKIP-only (disabling AES), a
Chromebook will connect as expected, without having to cycle through
the DHCPDISCOVER -> DHCPOFFER loop. TKIP encryption implies a/g-only
speeds, so this is a less than ideal workaround.

Is anyone else on the list having difficulty getting Chromebooks to
connect to their enterprise wireless?

Thanks!
-----------------------------------------------
Chris Alman
Network Engineer, University of Northern Iowa
Office: (319) 273-5964
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