Chapter 39 Device HA

B form a virtual router that uses cluster ID 1. ZyWALLs C and D form a virtual router that uses cluster ID 2.

Figure 452 Cluster IDs for Multiple Virtual Routers

A

B

C

D

1

2

Monitored Interfaces in Active-Passive Mode Device HA

You can select which interfaces device HA monitors. If a monitored interface on the ZyWALL loses its connection, device HA has the backup ZyWALL take over.

Enable monitoring for the same interfaces on the master and backup ZyWALLs. Each monitored interface must have a static IP address and be connected to the same subnet as the corresponding interface on the backup or master ZyWALL.

Virtual Router and Management IP Addresses

•If a backup takes over for the master, it uses the master’s IP addresses. These IP addresses are know as the virtual router IP addresses.

•Each interface can also have a management IP address. You can connect to this IP address to manage the ZyWALL regardless of whether it is the master or the backup.

For example, ZyWALL B takes over A’s 192.168.1.1 LAN interface IP address. This is a virtual router IP address. ZyWALL A keeps it’s LAN management IP address of

 

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ZyWALL USG 2000 User’s Guide