
Chapter 24 Device HA
ZyWALL (ZLD) CLI Reference Guide
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" Only ZyWALLs of the same model and firmware version can synchronize.
Otherwise you must manually configure the master ZyWALL’s settings on the backup (by
editing copies of the configuration files in a text editor for example).
24.1.1 Before You Begin
• Configure a static IP address for each interface that you will have device HA monitor.
" Subscribe to services on the backup ZyWALL before synchronizing it with the
master ZyWALL.
• Synchronization includes updates for services to which the master and backup ZyWALLs
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 ZyWALLs to the same services.
24.2 General Device HA Commands
This table lists the general commands for device HA.
24.3 Active-Passive Mode Device HA
Virtual Router
The master and backup ZyWALL form a single ‘virtual router’.
Cluster ID
You can have multiple ZyWALL virtual routers on your network. Use a different cluster ID to
identify each virtual router.
Table 121 device-ha General Commands
COMMAND DESCRIPTION
show device-ha status Displays whether or not device HA is activated, the
configured device HA mode, and the status of the
monitored interfaces.
[no] device-ha activate Turns device HA on or off.
device-ha mode {active-passive | legacy} Sets the ZyWALL to use active-passive or legacy
(VRRP group based) device HA.
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