Device Ha; Chapter 35 Device Ha; Overview; What You Can Do In The Device Ha Screens - ZyXEL Communications ZyWALL USG 300 User Manual

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35.1 Overview

Device HA lets a backup ZyWALL (B) automatically take over if a master ZyWALL (A) fails.

Figure 396 Device HA Backup Taking Over for the Master

35.1.1 What You Can Do in the Device HA Screens

• Use the General screen
settings, and see the status of each interface monitored by device HA.
• Use the Active-Passive Mode screens
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
You can configure general legacy mode HA settings including link monitoring, configure
the VRRP group settings and synchronize backup ZyWALLs.

35.1.2 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).
ZyWALL USG 300 User's Guide
A
B
(Section 35.2 on page 558) to configure device HA global
(Section 35.3.1 on page
(Section 35.5 on page
35

Device HA

561) to use active-passive
565) to use legacy mode device HA.
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