Router/Config/Interface

Interface IP

1. Enter Configuration Mode
   
2. From the Device Setup Menu, Select Interfaces
   
3. Select the interface who's settings you want to modify and click Edit
   
4. Enter new IP Address and Subnet Mask. Click OK.
   
5. Click Apply.

Default Gateway

This need only be done if you're modifying the Internet connection.

1. But wait! What about the default gateway! Expand the Routing menu option and select Static Routes
   
2. There should only be one entry, it should have the IP Address 0.0.0.0 (This means ALL traffic). Select it and click Edit
   
3. Enter the new Gateway IP and click OK
   
4. Click Apply.

Congratulations

You've successfully change the IP information!