ZyXEL Communications 2 Plus User Manual

ZyWALL 2 Plus User’s Guide

This chapter describes how to configure WAN settings. 

• Use the Route screen to configure route priority for the ZyWALL. 
• Use the WAN screen to configure the WAN port for Internet access on the ZyWALL.
• Use the Traffic Redirect screen to configure an alternative gateway.
• Use the Dial Backup screen to configure the backup WAN dial-up connection.

The metric represents the "cost of transmission". A router determines the best route for 
transmission by choosing a path with the lowest "cost". RIP routing uses hop count as the 
measurement of cost, with a minimum of "1" for directly connected networks. The number 
must be between "1" and "15"; a number greater than "15" means the link is down. The 
smaller the number, the lower the "cost".

1 The metric sets the priority for the ZyWALL's routes to the Internet. Each route must 

have a unique metric.

2 The priorities of the WAN port routes must always be higher than the dial-backup and 

traffic redirect route priorities.

If the WAN port route has a metric of "1" and the traffic-redirect route has a metric of "2" and 
dial-backup route has a metric of "3", then the WAN port route acts as the primary default 
route. If the WAN port route fails to connect to the Internet, the ZyWALL tries the traffic-
redirect route next. In the same manner, the ZyWALL uses the dial-backup route if the traffic-
redirect route also fails. 
The dial-backup or traffic redirect routes cannot take priority over the WAN routes.

Click NETWORK > WAN to open the Route screen. Use this screen to configure the 
priorities of the ZyWALL’s routes and settings for Windows Networking traffic.