ZyXEL Communications USG-300 - V2.20 ED 2 Manual page 725

Make sure the bridge interfaces of the master ZyWALL (A) and the backup
1
ZyWALL (B) are not connected.
Configure the bridge interface on the master ZyWALL, set the bridge interface as a
2
monitored interface, and activate device HA.
Configure the bridge interface on the backup ZyWALL, set the bridge interface as a
3
monitored interface, and activate device HA.
ZyWALL USG 300 User's Guide
A
B
Br0 {ge4, ge5}
A
B
Br0 {ge4, ge5}
A
B
Br0 {ge4, ge5}
Chapter 39 Device HA
725