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DHCP Reply Messages Dropped Notification

I have a network with 9 switches, 3 of which are Cisco Express 500's. On those 3 switches I get a notification message once or twice a day stating: "Dynamic Host Configuration Protocol (DHCP) reply messages dropped for non-existing or disconnected devices on this interface." The recommended solution is: "Reconnect the device. Check if unauthorized device is connected to this network. Disconnect the unauthorized device." The interface is a PoE port that has a Cisco AP connected to it and is configured with the appropriate smartport setting. The device is not disconnected, and I am positive that no unauthorize devices are connected. This does not appear to cause any issues with functionality, but I would like to resolve the issue that is causing this message. Thanks in advance for any suggestions.

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Re: DHCP Reply Messages Dropped Notification

By default invalid message from relay agents are dropped so if you disabled that feature you will not get any notification messages for invalid messages.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_12c_ea1/configuration/guide/swdhcp82.html

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