Resolved! Why "mac-address-table static 0000.0c07.ac01 interface FastEthernet1/0 vlan 3" in the router ?
Hi All I did not type the following command. Why does it appear when I show run ? Which command can cause the issue? Thank you mac-address-table static 0000.0c07.ac01 interface FastEthernet1/0 vlan 3