Specifications

Chapter 4: Creating a High Availability Environment 45
Step 1: Complete Installation Process for Both Systems
To prepare the Barracuda Link Balancers for clustering, put both systems in the production location
on the network. Complete the following steps:
1. If the primary system is a brand new, unconfigured system, then you will need to completely
install, configure and test the primary system as described in Installing the Barracuda Link
Balancer on page 7.
If the primary system is already configured and operational, update its firmware. If the firewall
is enabled, change its LAN IP address to a new value. The original LAN IP address will be used
as the VRRP virtual IP address.
2. On the backup system:
• Configure a WAN link and connect to the Internet.
• Activate the system (Basic > Status).
• Configure the LAN IP address, LAN2 IP address (optional) and the default domain
(
Basic > IP Configuration).
• Set the time zone to be the same as that of the primary system (
Basic > Administration).
• Update the firmware (
Advanced > Firmware Update).
• Connect to the LAN.
• If using the LAN2 ports, connect them using a crossover cable.
Step 2: Create the Cluster
Navigate to the Advanced > High Availability page on both systems and perform the following steps:
1. On the primary system, enter values into the fields in the
Cluster Settings section, and save your
changes.
2. On the backup system, enter the same values for the cluster settings and save your changes. In
the
Clustered Systems section, enter the LAN2 IP address of the primary system (if it is to be
used) or the LAN IP address of the primary system and click
Join Cluster. The backup system
will reboot.
3. When the backup system comes back up, refresh the
Advanced > High Availability page on both
systems and verify that
• Each system’s LAN or LAN2 IP address appears in the Clustered Systems table.
• The status of each system is green.
The systems are now joined. The shared configuration settings of the primary system (as listed in
Synchronization of Data Between Clustered Systems on page 41) will be copied to the secondary
system, and each system will begin monitoring the health of the other system.
Step 3: Connect WAN Links and Test
Connect all WAN links to the backup Barracuda Link Balancer.
To test the clustering capability, power off the active system. The backup system should take over the
link balancing function. Power the system back on to test automatic failback.
If you chose the option to failover if all WAN links are down, then test this by removing the WAN
links from the active system.