How To Configure Load Balancing; Set Up Available Bandwidth On Ethernet Interfaces - ZyXEL Communications ZyWALL USG 50 User Manual

The ZyWALL automatically adds the cellular interface to the system default WAN
6
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
also Section 7.3 on page 117

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 (wan1) and 512
Kbps (wan2) 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 64 Trunk Example
You do not have to change many of the ZyWALL's settings from the defaults to set
up this trunk. You only have to set up the outgoing bandwidth on each of the WAN
interfaces and configure the WAN_TRUNK trunk's load balancing settings.

7.3.1 Set Up Available Bandwidth on Ethernet Interfaces

Here is how to set a limit on how much traffic the ZyWALL tries to send out
through each WAN interface.
ZyWALL USG 50 User's Guide
Chapter 12 on page
for an example.
wan1: 1 Mbps
wan2: 512 Kbps
Chapter 7 Tutorials
277. See
117