Configuring Device Ha - ZyXEL Communications ZyWall 110 User Manual

Monitored Interfaces in Device HA
You can select which interfaces Device HA monitors. If a monitored interface on the Zyxel Device loses
its connection, Device HA has the backup Zyxel Device take over.
Enable monitoring for the same interfaces on the master and backup Zyxel Devices. 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 Zyxel Device.
Virtual Router and Management IP Addresses
• If a backup takes over for the master, it uses the master's IP addresses. These IP addresses are known
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 Zyxel Device regardless of whether it is the master or the backup.
For example, Zyxel Device B takes over A's 192.168.1.1 LAN interface IP address. This is a virtual router IP
address. Zyxel Device A keeps it's LAN management IP address of 192.168.1.5 and Zyxel Device B has its
own LAN management IP address of 192.168.1.6. These do not change when Zyxel Device B becomes
the master.
Figure 540 Management IP Addresses

42.3.1 Configuring Device HA

The Device HA screen lets you configure general Device HA settings, view and manage the list of
monitored interfaces, and synchronize backup Zyxel Devices. To access this screen, click Configuration
> Device HA > Device HA.
Chapter 42 Device HA
192.168.1.1
192.168.1.5
192.168.1.1
192.168.1.6
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