Hardware Installation

You need to install hardware before you can do failover configuration.

The following diagram shows optimal high availability hardware setup for the failover configuration. The eth0 NIC of each appliance is plugged in the same switch, and the eth1 NIC on a different switch. The appliances are configured to use the fault-tolerant network interface bond0.

Failover Hardware Setup

Other configurations also work. Each appliance can be connected to the network using the same or a different switch, using bond0 or not, and either or both NICs (eth0 and eth1). Network configuration that uses eth0 and eth1 independently is supported. As long as the failover membership can be established between the two nodes to guarantee the real-time replication of data, the failover works.

When choosing the IP addresses:

  • Each appliance must be able to access the other appliance using its private IP address.
  • Each appliance must be able to own the public IP address.
  • The last digit of each IP address must be different.