RIP Overview
Routing Information Protocol (RIP, RFC 1058 and RFC 1389) allows the Zyxel Device to exchange routing information with other routers. To activate RIP for the WAN interface, select the supported RIP version and operation.
Click Network Setting > Routing > RIP to open the RIP screen. Select the desired RIP version and operation by clicking the checkbox. To stop RIP on the WAN interface, clear the checkbox. Click the Apply button to start or stop RIP and save the configuration.
Network Setting > Routing > RIP
The following table describes the labels in this screen.
Network Setting > Routing > RIP 
This is the index of the interface in which the RIP setting is used.
This is the name of the interface in which the RIP setting is used.
The RIP version controls the format and the broadcasting method of the RIP packets that the Zyxel Device sends (it recognizes both formats when receiving). RIPv1 is universally supported but RIPv2 carries more information. RIPv1 is probably adequate for most networks, unless you have an unusual network topology. When set to Both, the Zyxel Device will broadcast its routing table periodically and incorporate the RIP information that it receives
Select Passive to have the Zyxel Device update the routing table based on the RIP packets received from neighbors but not advertise its route information to other routers in this interface.
Select Active to have the Zyxel Device advertise its route information and also listen for routing updates from neighboring routers.
Select the checkbox to activate the settings.
Disable Default Gateway
Select the checkbox to set the Zyxel Device to not send the route information to the default gateway.
Click Cancel to exit this screen without saving.
Click Apply to save your changes back to the Zyxel Device.