Configuring the xHA backbone for secure and reliable data transfer between xHA nodes.
For a secure and reliable high availability failover, BlueCat strongly recommends a hardwired xHA backbone connection for data transfer between the Active and Passive nodes.
To use the xHA backbone:
Connect an Ethernet cable to the xHA/eth1 ports on each DNS/DHCP Server appliance, as shown below.
Note: For physical appliances, you can make a hardwired connection between the xHA interface (eth1) of each node. For a pair of virtual machines, you can configure the xHA backbone (eth1) when adding a server to Address Manager or when creating the xHA pair.
Log in to the Address Manager user interface, and add the DNS/DHCP Servers to Address Manager. You can
configure the IPv4 address for the xHA backbone connection when adding a server,
or when creating an xHA pair.
Note: To locate the xHA/eth1 ports on your DNS/DHCP Server appliances, refer to the installation posters that came with your appliances.Attention: Make sure to configure the IP addresses of the xHA interfaces (eth1) on a different subnet than any other interfaces. This is the recommended best practice for direct xHA backbone connections and connections over switches or wide area networks (WAN), but is not mandatory if you're using a direct connection to the eth1 interface on each DNS/DHCP Server. In addition, if the DNS/DHCP Servers are not connected by a direct ethernet xHA backbone connection, the xHA interfaces should be separated onto a different LAN segment to prevent the xHA interfaces from receiving layer-2 broadcast traffic intended for other interfaces. This can be achieved by separate VLANs for each interface, private networks (for virtual appliances), or separate physical switches. For information and help on running xHA with switches, contact BlueCat Customer Care. For details on creating an xHA pair in Address Manager, refer to Managing xHA.