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wont get ip over wireless until ethernet is plugged in

Hi All,

i have been having an issue pop up the last few weeks at work.
A laptop will try to connect to our wireless network (Cisco WAP4410N accesspoints) but will not recieve an IP address from DHCP(Server2008R2). If i plug an ethernet cable in and do a repair on the wireless connection it suddenly gets and IP(reserved and some not reserved).

I have changed DHCP servers with still no luck. Not sure if its the access points as it happens school wide, and this problem only started showing in the last few weeks.

Wireless points are spread over channels 1,6,11 all running the same SSID etc.  

Any help or suggestions would be great.. Please let me know if you need more info

Thanks in Advance
1 Solution
Is the VLAN functionality turned off?
Try to remove the Wireles Card (delete from Device Manager), do a scan to reload the driver  and join it to the Network again.

Reinstall the Wireless driver, maybe will be better to get new driver.
dropbear63Author Commented:
Vlan is turned off on all points
Will try new driver Friday and let u know how I go
There is x80 laptops all running same soe.   Strange that 90% of them work

Thanks for the fast replies
dropbear63Author Commented:
Updated Driver on some laptops added to stability but ended up install apple airport extreme points and solved all issues
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