Barracuda Networks Load Balancer, Administrator'S Manual

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Introduction 13
High Availability
With simple setup through the Web administrative interface, the Barracuda Load Balancer supports
High Availability configurations. Just point the backup Barracuda Load Balancer to the primary
Barracuda Load Balancer's management IP address to synchronize configurations and establish a
highly available network that brings your server farm to enterprise grade availability.
Web Administrative Interface
The Barracuda Load Balancer configuration is administered through an SSL-secured Web interface.
With features such as quick server and service adding, health monitoring, and Auto-Discover, the
Barracuda Load Balancer is easy to use. A typical configuration can be performed in less than ten
minutes.
Last Resort Server
The Barracuda Load Balancer allows you to specify a Last Resort Server, which is the server to which
all traffic for a particular Service is routed in the event that all Real Servers associated with that
Service are not available. This Last Resort Server can be located on a different network, or even across
the Internet, so long as the WAN port of the Barracuda Load Balancer has a route to that server. If all
Real Servers for a particular Service are unavailable, the Barracuda Load Balancer will route all
traffic bound for that Service to the Last Resort Server. The Last Resort Server does not need to be
configured as a Real Server for the Service, and the Barracuda Load Balancer will not perform any
health checks on the Last Resort Server.