Device Ha Pro - ZyXEL Communications USG40 User Manual

Table 274 Configuration > Device HA > General (continued)
LABEL
HA Status
Apply
Reset

41.3 Device HA Pro

You need a license to use Device HA Pro. Device HA Pro is easier to deploy than Device HA, is more
reliable (no risk of overloading), and faster (Device HA causes a connection break of 10~30
seconds while Device HA Pro just has 1~2 seconds). In addition to configuration file backup in
Device HA, device time, TCP sessions (IPv4/IPv6), IPSec VPN sessions, login/logout information
and license status can also be backed up using Device HA Pro.
Active and Passive Devices
Device HA Pro uses a dedicated heartbeat link between an active device ('master') and a passive
device ('backup') for status syncing and backup to the passive device. On the passive device, all
ports are disabled except for the port with the heartbeat link.
In the following example, ZyWALL/USG A is the active device that is connected to passive device
ZyWALL/USG B via a dedicated link that is used for heartbeat control, configuration synchronization
and troubleshooting. All links on ZyWALL/USG B are down except for the dedicated heartbeat link.
Note: The dedicated heartbeat link port must be the highest-numbered port on each
ZyWALL/USG
Figure 484 Device HA Pro
Chapter 41 Device HA
DESCRIPTION
The text before the slash shows whether the device is configured as the master or the
backup role.
This text after the slash displays the monitored interface's status in the virtual router.
Active - This interface is up and using the virtual IP address and subnet mask.
Stand-By - This interface is a backup interface in the virtual router. It is not using the
virtual IP address and subnet mask.
Fault - This interface is not functioning in the virtual router right now. In active-passive
mode if one of the master ZyWALL/USG's interfaces loses its connection, the master
ZyWALL/USG forces all of its interfaces to the fault state so the backup ZyWALL/USG can
take over all of the master ZyWALL/USG's functions.
Click Apply to save your changes back to the ZyWALL/USG.
Click Reset to return the screen to its last-saved settings.
for Device HA Pro to work.
ZyWALL/USG Series User's Guide
A
B
x
710