Chapter 7 Tutorials
ZyWALL USG 300 User’s Guide
122
5 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 67 Status
6 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 Chapter 14 on page 369. See
also Section 7.3 on page 122 for an example.
7.3 How to Configure Load Balancing
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 68 Trunk Example
ge2: 1 Mbps
ge3: 512 Kbps
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