Chapter 41 Device HA
ZyWALL/USG Series User’s Guide
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Failover from the active ZyWALL/USG to the passive ZyWALL/USG is activated when:
• A monitored interface is down
• A monitored service (daemon) is down
• The hearbeat link exceeds the failure tolerance.
After failover, the initial active ZyWALL/USG becomes the passive ZyWALL/USG after it recovers.
41.3.1 Deploying Device HA Pro
1 Register either the active or passive ZyWALL/USG with a Device HA Pro license at MyZyXEL.com.
Check that it’s properly licensed in Licensing > Registration > Service in the active ZyWALL/
USG.
2 Make sure the passive ZyWALL/USG is offline, then enable Device HA in Device HA > General in
the passive ZyWALL/USG.
3 Must make sure the FTP port in System > FTP (default 21) is the same on both ZyWALL/USGs. FTP
is used for transferring files in the event of failover from active to passive ZyWALL/USG.
4 Connect the passive ZyWALL/USG to the active ZyWALL/USG using the highest-numbered ports on
both ZyWALL/USGs.
Note: If both ZyWALL/USGs are turned on at the same time with Device HA enabled, then
they may send the heartbeat at the same time. In this case, the ZyWALL/USG with
the bigger MAC address becomes the passive ZyWALL/USG.
41.3.2 Configuring Device HA Pro
Go to Configuration > Device HA > Device HA Pro and configure the following screen.
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