Configuring The Legacy Mode Screen - ZyXEL Communications ZyWALL USG 300 User Manual

• When the ZyWALL is the master, the interface uses its IP address, the IP
address of the virtual router. If the ZyWALL is a backup, the interface uses its
management IP address.
• You can only have one active VRRP group for each interface, and you can only
have one active VRRP group for each virtual router (VR ID).
• You can set up authentication for a VRRP group. If you select AH MD5
authentication, the VRRP group uses IP protocol 51 (AH), instead of IP protocol
112 (VRRP).
Link Monitoring and Management Access
Link monitoring has a backup ZyWALL take over all of an unavailable master
ZyWALL's static IP addresses. This way the backup ZyWALL takes over all of the
master ZyWALL's functions. This also means you can only access the original
master ZyWALL through its management IP address.

36.6 Configuring the Legacy Mode Screen

The Device HA Legacy Mode screen lets you configure general legacy mode HA
settings including link monitoring, configure the VRRP group and synchronize
backup ZyWALLs. To access this screen, click Device HA > Legacy Mode.
Figure 433 Device HA > Legacy Mode
ZyWALL USG 300 User's Guide
Chapter 36 Device HA
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