Here is how to configure static MAC address port security for SX300 series running
the 126.96.36.199 code
1.) Device the desired switch interface as a locked interface and specify the action on violation, in this example I chose shutdown for interface FE1
2.) Create a static MAC entry on the interface, on this example, using FE1. Notice the command prompt, the last block is ED and on the MAC address entry I chose EE. The configuration should include the MAC address that you expect connecting to the port.