Please let me know if the following is possible:
1- A port on the Cisco 6500, Fa1/1, is configured as an access port
switchport mode acess
switchport access vlan 100
no cdp enable
spanning-tree bpdufilter enable
2- There are no SVI on this switch
3- A customer is stating that they see our MAC of interface Fa1/1 on their equipment
Is this possible? How can they learn the MAC address, could they be using wireshark?
The LOOP packets can be stopped using the no keepalive interface command but I do not recommend it because in such case, you are removing a mechanism to detect self-looped ports.
Do you believe there is any inherent security risk in the customer knowing the MAC address of the port he is connected to?