Error message in 1200 Series log

[rx33328]

I am getting the following message in the log of a few of our 1200 series access points.

Network Bridge Loop: Received packet from Self destined to [AWC Mcast AP-Only]014096ffff00 on port "emac0"

What is causing this and what can I do to prevent it from happening?

[derwin]

This error message means that a packet that was sent out the radio port has been seen on the ethernet port.

You have a spanning tree loop find this and remove the loop.

Do you have any WGB's ? if so I would be looking for one of them that is connected back to the main LAN