Device Ha General; Before You Begin - ZyXEL Communications USG40 User Manual

41.2 Device HA General

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.
Synchronization
Use synchronization to have a backup ZyWALL/USG copy the master ZyWALL/USG's configuration,
signatures (anti-virus, IDP/application patrol, and system protect), and certificates.
Note: Only ZyWALL/USGs of the same model and firmware version can synchronize.
Otherwise you must manually configure the master ZyWALL/USG's settings on the backup (by
editing copies of the configuration files in a text editor for example).
Finding Out More
• See Section 41.6 on page 719

41.2.1 Before You Begin

• Configure a static IP address for each interface that you will have Device HA monitor.
Note: Subscribe to services on the backup ZyWALL/USG before synchronizing it with the
master ZyWALL/USG.
Synchronization includes updates for services to which the master and backup ZyWALL/USGs are
both subscribed. For example, a backup subscribed to IDP/AppPatrol, but not anti-virus, gets IDP/
AppPatrol updates from the master, but not anti-virus updates. It is highly recommended to
subscribe the master and backup ZyWALL/USGs to the same services.
The Configuration > Device HA General screen lets you enable or disable Device HA, and
displays which Device HA mode the ZyWALL/USG is set to use along with a summary of the
monitored interfaces.
Click on the icons to go to the OneSecurity.com website where there is guidance on configuration
walkthroughs, troubleshooting, and other information.
Chapter 41 Device HA
for Device HA background/technical information.
ZyWALL/USG Series User's Guide
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