ZyXEL Communications 1000 Manuel D’Utilisation

 Chapter 39 Device HA

ZyWALL USG 1000 User’s Guide

B form a virtual router that uses cluster ID 1. ZyWALLs C and D form a virtual 
router that uses cluster ID 2.

Figure 452   Cluster IDs for Multiple Virtual Routers 

You can select which interfaces device HA monitors. If a monitored interface on 
the ZyWALL loses its connection, device HA has the backup ZyWALL take over.

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 

A

B

C

D

1

2