IP addressing and subnets

To configure high-availability (HA), you must consider the subnet that is used by the secondary HA host and the virtual IP address.

Administrators must ensure that the following conditions are met:
  • The secondary host is in the same subnet as the primary host.
  • When the IP address of the primary host is reassigned as a cluster virtual IP, the new IP address that you assign must be in the same subnet.
  • The secondary HA host that you want to add to the HA cluster is not a component in another HA cluster.