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Cisco Aironet 1250 clients have out of scope IP

I have a few 1250 AP's around the office all of which have been behaving normally for some time until this morning when clients connecting to one of the AP's have started to receive IP addresses outside our dhcp scope.

Current lease scope is 10.1.5.1-254  -  10.1.6.1-254

However, clients connecting to this single AP are being given 10.0.0.0 addresses.

I've checked our DHCP server and see nothing out of the ordinary, but restarted service just in case. I've also checked the AP to make sure it somehow hadn't started thinking it is a DHCP server and it's fine as well. Nothing in the logs to indicate a problem. Other APs in the office are acting as expected.
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MrBlister
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MrBlister
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MrBlisterAuthor Commented:
It's actually happening on all of the AP's now. Devices that are identified as ccx-client seem to be picking up addresses normally but devices that are type unknown are being given the out of scope range.
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MrBlisterAuthor Commented:
It looks as if only non Microsoft (windows and windows phone) devices are being given the out of scope ip addresses. All macs, iphones/pads and android devices are coming up empty.
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MrBlisterAuthor Commented:
Rogue DHCP server on the network.
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