I then reviewed the IEEE mac list and found no manufactuer for either e2e700 or e0e003. The mac addresses also appear to be offset.
I then deleted both e2e7.0085.e0e0 and e0e0.03ff.ff00 from the secure mac table. Things continued with incident. An additional confusion is that neither port had multiple computers connected. Both had a single dell laptop connected.
But on reviewing both ports the following morning;
SWITCHA #sh mac int fa0/39
Non-static Address Table:
Destination Address Address Type VLAN Destination Port
Your problem looks like you are running some application in the laptop which causes this. You can install a sniffer and try to indentify the source of the mac address, which will give a better knowledge of your problem.
Also you can try configuring static mac address by using the command
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