ZyXEL Communications ZYWALL 1050 - V2.00 EDITION 1 Podręcznik Użytkownika Strona 223

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ZyWALL (ZLD) CLI Reference Guide
223
CHAPTER 24
Device HA
Use device HA to increase network reliability. Device HA lets a backup ZyWALL (B)
automatically take over if a master ZyWALL (A) fails.
Figure 25 Device HA Backup Taking Over for the Master
24.1 Device HA Overview
Active-Passive Mode and Legacy Mode
Active-passive mode lets a backup ZyWALL take over if the master ZyWALL fails.
Legacy mode uses VRRP (Virtual Router Redundancy Protocol) groups and allows for
more complex relationships between the master and backup ZyWALLs, such as active-
active or using different ZyWALLs as the master ZyWALL for individual interfaces.
Legacy mode configuration involves a greater degree of complexity. Active-passive mode
is recommended for general failover deployments.
The ZyWALLs must all support and be set to use the same device HA mode (either active-
passive or legacy).
Management Access
You can configure a separate management IP address for each interface. You can use it to
access the ZyWALL for management whether the ZyWALL is the master or a backup. The
management IP address should be in the same subnet as the interface IP address.
Synchronization
Use synchronization to have a backup ZyWALL copy the master ZyWALL’s configuration,
signatures (anti-virus, IDP/application patrol, and system protect), and certificates.
A
B
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