Scenario 2 - Wan Load Balancing And Customized Usage Of Wan; Connection For Specific Traffic --Dual Wan Setting; Application Scenario; Configuration Guide - ZyXEL Communications ZyWALL USG Series Application Notes

ZyXEL – USG Application Notes
Scenario 2 — WAN Load Balancing and Customized
Usage of WAN Connection for Specific Traffic --
Dual WAN setting

2.1 Application Scenario

The company has two WAN connections for sharing outbound internet traffic. WAN1
uses a static IP address, and WAN2 uses a PPPoE connection. Since WAN1 ISP is also
the company's VoIP provider, the network administrator wants VoIP traffic primarily
sent out over WAN1. In case WAN1 is down, the VoIP traffic can still go out over
WAN2 PPPoE connection. The network administrator also wants HTTP traffic sent
over WAN2 PPPoE connection primarily. In case WAN2 PPPoE is down, LAN users can
still surf Internet over WAN1. For all other types of traffic, administrator needs the
two WAN connections to share the outbound traffic load, performing load balancing.

2.2 Configuration Guide

Goals to achieve:
1) VoIP traffic goes out primarily through WAN1. In case WAN1 is down, it will go out
via WAN2 PPPoE connection.
2) HTTP traffic goes out primarily through WAN2 PPPoE connection. In case WAN2
PPPoE is down, it will go out via WAN1.
3) All other traffic goes out via WAN trunk performing Load Balancing with Least
8