… by using the Web UI
To change network interface addresses, navigate to Configuration > Networking, then select the options you would like.
When done, click Save network changes, and then Restart Network to apply the updates.
The changes will take a moment to apply after which you can reconnect to the newly configured address.
… without using the Web UI
If the TimeKeeper Web UI is not available (yet) e.g., during initial setup, and you need to change the default IP addresses (see Rear Panel Overview), follow the procedure outlined under Configuring IP Address(es).