ZyXEL Communications VPN Series Handbook page 615

How to Configure a Trunk for WAN Load Balancing with a
Static or Dynamic IP Address
This is an example of using ZyWALL/USG Trunk for two WAN connections to the
Internet. The available bandwidth for the connections is 1000 kbps (wan1 with
static IP address) and 512 Kbps (wan2 with dynamic IP address) respectively. As
these connections have different bandwidths, we will use the Weighted Round
Robin (WRR) algorithm to send traffic to wan1 and wan2 in a 2:1 ratio.
ZyWALL/USG with WAN Load Balancing Example
Note: All network IP addresses and subnet masks are used as examples in this article.
Please replace them with your actual network IP addresses and subnet masks. This example
was tested using USG310 (Firmware Version: ZLD 4.25).
www.zyxel.com
615/810