ZyXEL Communications 100 Series User Manual

 Chapter 34 Device HA

ZyWALL USG 100/200 Series User’s Guide

Enable monitoring for the same interfaces on the master and backup ZyWALLs. Each 
monitored interface must have a static IP address and be connected to the same subnet as the 
corresponding interface on the backup or master ZyWALL.  

• If a backup takes over for the master, it uses the master’s IP addresses. These IP addresses 

are know as the virtual router IP addresses. 

• Each interface can also have a management IP address. You can connect to this IP address 

to manage the ZyWALL regardless of whether it is the master or the backup. 

For example, ZyWALL B takes over A’s 192.168.1.1 LAN interface IP address. This is a 
virtual router IP address. ZyWALL A keeps it’s LAN management IP address of 192.168.1.5 
and ZyWALL B has its own LAN management IP address of 192.168.1.6. These do not 
change when ZyWALL B becomes the master.

Figure 434   Management IP Addresses

The Device HA Active-Passive Mode screen lets you configure general active-passive mode 
device HA settings, view and manage the list of monitored interfaces, and synchronize backup 
ZyWALLs. To access this screen, click Device HA > Active-Passive Mode.

A

192.168.1.1

B

192.168.1.1

192.168.1.5

192.168.1.6