ZyXEL Communications USG 2000 User Manual

Chapter 7 Tutorials

ZyWALL USG 2000 User’s Guide

Go to the Dashboard. The Interface Status Summary section should contain a 
“cellular” entry. When its connection status is Connected you can use the 3G 
connection to access the Internet. 

Figure 74   Status           

The ZyWALL automatically adds the cellular interface to the system default WAN 
trunk. If the ZyWALL is using a user-configured trunk as its default trunk and you 
want this cellular interface to be part of it, use the Trunk screens to add it.

This way the ZyWALL can automatically balance the traffic load amongst the 
available WAN connections to enhance overall network throughput. Plus, if a WAN 
connection goes down, the ZyWALL still sends traffic through the remaining WAN 
connections. For a simple test, disconnect all of the ZyWALL’s wired WAN 
connections. If you can still access the Internet, your cellular interface is properly 
configured and your cellular device is working.

To fine-tune the load balancing configuration, see 

. See 

also 

 for an example.

This example shows how to configure a trunk for two WAN connections (to the 
Internet). The available bandwidth for the connections is 1Mbps (ge2) and 512 
Kbps (ge3) respectively. As these connections have different bandwidth, use the 
Weighted Round Robin algorithm to send traffic to wan1 and wan2 in a 2:1 
ratio.

Figure 75   Trunk Example