Barracuda Campus Help Center / Reference
How do I cluster my Barracuda Spam & Virus Firewall Vx Virtual Appliance to my Barracuda Spam & Virus Firewall Appliance?
Scope:
This solution applies to all Email Security Gateway Vx Virtual Appliances.
Answer:
The recommended configuration for clustering your Email Security Gateway Vx Virtual Appliance to your Email Security Gateway appliance is:
1. From the Email Security Gateway Vx Virtual Appliance, go to the Advanced -> Clustering page and add the IP address of the Email Security Gateway appliance to the Clustered Systems section.
2. Click on the Join Cluster button.
This will join your Email Security Gateway Vx Virtual Appliance to your existing Email Security Gateway appliance.
Link:
https://campus.barracuda.com/solution/50160000000IGM4AAO