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Chapter 25 Device HA
ZyWALL (ZLD) CLI Reference Guide
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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).
25.1.1 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 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.
25.2 General Device HA Commands
This table lists the general commands for device HA.
25.3 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.
Monitored Interfaces in Active-Passive Mode Device HA
You can select which interfaces device HA monitors. If a monitored interface on the ZyWALL loses
its connection, device HA has the backup ZyWALL take over.
Enable monitoring for the same interfaces on the master and backup ZyWALLs. Each monitored
interface must have a static IP address and be connected to the same subnet as the corresponding
interface on the backup or master ZyWALL.
Table 124 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.