Disconnection every half hour on 802.11A and G

Hello,
we installed our 14 APs "1131", WLC version is 5.2.178.0.
we are testing it at the moment, but it seems that each clients are disconnected every half-hour, on all radio slots and we have only one WLAN.
I thought it was DHCP lease issue because I configured for renewal every hour and DHCPREQUEST start at 50% of lease, but I reconfigured it for DHCP lease at one day.
Can you help me on how to debug it ?
thanks

Check the parameters for things like your authentication timeouts & key rotation times.
It might also be worthwhile to do a spectrum scan (netstumbler - www.netstumbler.com - it's free) and see if there's some external interferer.
You don't provide many details about the size, spread, number of users, etc, so answers are going to be fairly general. Post your(sanitized)config if possible.
Good Luck
Scott

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Disconnection every half hour on 802.11A and G

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