Zhone Technologies 6218-I2 - Manual (Page 60)

Advanced Setup
60 6218-I2 Wireless Router User’s Guide 6218-A2-ZB23-10
If you want to specify the default gateway address, then uncheck the box as
seen below. Enter the default gateway address and, optionally, the WAN
interface you will use. Click on Save / Apply to save the settings.
If you add or change the default gateway address, you must reboot the router
to put the new default gateway IP address into effect.
Figure 58: Default Gateway Setup
Routing – Static Route
Use the Routing - Static Route screen to add a static route to the routing table.
Figure 59: Static Route Setup