dhcp crash ip for ap

[mohammad abdul jawad]

     i have controller 5508 version  7.0.116.0 and AP 1242

    the controller is connected to N7k with 4 fiber cables and configured portchannel from N7k and enable LAG in the controller .

    all APs are working fine and register in windows dhcp server by option 43

   but the  problem appears in the DHCP Server . I note the presence of crash IPs in the AP dhcp scope when i restarted controller for test or

diable and enable ports for port-channel in the N7k ..

regards ,

[George Stefanick]

Not sure what you mean by "crash IPs" can you further explain please?

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"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin
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‎"I'm in a serious relationship with my Wi-Fi. You could say we have a connection."

[mohammad abdul jawad]

Crash ip meaning ( the IP was used by AP appears as crash IP in the DHCP when the APs power off and power on )

This affects the number of IP reservated for AP scope in the DHCP server .

when all AP is power off and power on , some access points is not registration in the controller because 

threr is no enough ip in the DHCP server.

regards ,

[umar bhatti]

what is the lease time you got on DHCP server.