Filter
Top Products
ZyWALL USG 100/200 Series User’s Guide
575
CHAPTER 34
Device HA
34.1 Overview
Device HA lets a backup ZyWALL (B) automatically take over if a master ZyWALL (A) fails.
Figure 430 Device HA Backup Taking Over for the Master
34.1.1 What You Can Do in the Device HA Screens
• Use the General screen (Section 34.2 on page 576) to configure device HA global
settings, and see the status of each interface monitored by device HA.
• Use the Active-Passive Mode screens (Section 34.3.1 on page 579) to use active-passive
mode device HA. You can configure general active-passive mode device HA settings,
view and manage the list of monitored interfaces, and synchronize backup ZyWALLs.
•Use the Legacy Mode screens (Section 34.5 on page 583) to use legacy mode device HA.
You can configure general legacy mode HA settings including link monitoring, configure
the VRRP group settings and synchronize backup ZyWALLs.
34.1.2 What You Need to Know About Device HA
Active-Passive Mode and Legacy Mode
• Active-passive mode lets a backup ZyWALL take over if the master ZyWALL fails.
• Legacy mode allows for more complex relationships between the master and backup
ZyWALLs, such as active-active or using different ZyWALLs as the master ZyWALL for
individual interfaces. Legacy mode configuration involves a greater degree of complexity.
Active-passive mode is recommended for general failover deployments.
• The ZyWALLs must all support and be set to use the same device HA mode (either active-
passive or legacy).
A
B