One of our Cisco 3750G switches keeps showing this warning: Description: Gi4/0/43: Unexpected BPDU received. Port has been Disabled. Recommendation: Check Configuration of the switch, also make sure devices connected to the switch. Enable this port again. However, there is no thing connecting to the port Gi4/0/43 as shown this link: http://www.howtocisco.com/cisco/issues/switcherror1.htm. Why do you get this warning?
The Cisco Engineer checked the log and found that happened on 6/21/2010. This is possible the day our consultant added the switch. Since we had multple ports were configured to use fastport and bpduguard, he removed these lines from all ports.
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