Enables or disables the global port locking mode. The locking method can be chosen via hm2GlobalPortLockingMethod. Setting this value to enable when hm2GlobalPortLockingMethod is set to lockMacAndDisableUnusedPorts performs the complete lockdown of the device, i.e. unused ports are disabled,the FDBs are freezed and only frames from known users are forwarded. Setting this value to enable when hm2GlobalPortLockingMethod is set to disableUnusedPortsOnly disables only the unused ports. Setting this value to enable when hm2GlobalPortLockingMethod is set to lockMacOnly freezes the FDB and only frames from known users are forwarded. Setting this value to disable reverses this security feature. All ports which were previously disabled are re-enabled and the switch performs the transparent learning and forwarding. If the hm2GlobalPortLockingFallbackTimer is not zero, the switch re-enters the locked state automatically after the configured amount of time