Any network on the system can be locked or unlocked. When a network is locked, no modifications may be made to any device or route that uses that network. To add route or a device to a network, the network would have to be in an unlocked state.
Select Configuration > Network
The Configuration > Network page appears.
Click to select a network and click Lock/Unlock.
Note: If the network is currently unlocked, the button will read Lock. If the button is currently locked, the button will read Unlock.
At the confirmation window, click OK. When unlocking a network, you will also have to confirm your decision using a check box.