Chapter 34 Device Ha; Overview; What You Can Do In This Chapter; What You Need To Know - ZyXEL Communications ZyWALL 110 User Manual

34.1 Overview

Device HA lets a backup ZyWALL/USG (B) automatically take over if the master ZyWALL/USG (A)
fails.
Figure 367 Device HA Backup Taking Over for the Master
ZyWALL 110, ZyWALL 310, ZyWALL 1100， USG110, USG210, USG310, USG1100, and USG1900
support Device HA (High Availability).

34.1.1 What You Can Do in this Chapter

• Use the General screen
see the status of each interface monitored by device HA.
• Use the Active-Passive Mode screens
device HA. You can configure general active-passive mode device HA settings, view and manage
the list of monitored interfaces, and synchronize backup ZyWALL/USGs.

34.1.2 What You Need to Know

Active-Passive Mode
• Active-passive mode lets a backup ZyWALL/USG take over if the master ZyWALL/USG fails.
• The ZyWALL/USGs must be set to use the same device HA mode (active-passive).
Management Access
You can configure a separate management IP address for each interface. You can use it to access
the ZyWALL/USG for management whether the ZyWALL/USG is the master or a backup. The
management IP address should be in the same subnet as the interface IP address.
C
HAPTER
A
B
(Section 34.2 on page 558) to configure device HA global settings, and
(Section 34.3 on page
ZyWALL/USG Series User's Guide
557
3 4
Device HA
559) to use active-passive mode