If there is a device assigning the IP address such as router on your local network, the shield can be automatically assigned an IP address.
Connect to the web setup page of shield
Move to the SETUP page.
Click the [NETWORK] > [IPv4] menu.
Select the [IP Address Type] to [Auto IP Address] and click the [SAVE].
After rebooting for finishing the settings, the shield will be assigned an IP address.