ZyXEL Communications ZYWALL USG 2000 Support Notes page 219

ZyWALL USG 2000 Support Notes
L. Device HA FAQ
L01. What does the "Preempt" mean?
The "Preempt" means that the Backup with high priority can preempt the Backup with low
priority when the Backup device is online. And Master can always preempt any Backup.
L02. What is the password in Synchronization?
If the Backup wants to synchronize the configuration from Master, both Master and Backup
device must be set the same password.
L03. What is "Link Monitor" and how to enable it?
There is a new feature enhancement "Link Monitor" in ZLD 2.10 of USG 2000. By enabling
"Link Monitor" option, the ZyWALL monitors link status of direct-connected cables
constantly. If a master ZyWALL device HA interface's link is down, the faulty device HA
interface on master's router remains in status active and the rest of HA interface(s) on the
master router will turn into fault. The purpose of this design is to prevent the backup router
interface in the same HA group cannot detect the faulty event encountered on the master
router.
You can click on Device HA from the left panel and check the "Enable" checkbox to enable
"Monitored Interface."
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