How does the Barracuda Load Balancer handle failed servers?
When the Service Monitor detects a downed real server, the Barracuda Load Balancer automatically removes the server from the load-balanced cluster. If the real server becomes available, it will automatically place the server back in the distribution queue. Real servers may also be placed in “maintenance mode,” which gracefully removes them from any bound services in order to facilitate server maintenance or upgrades. When the real server is available again, administrators simply enable the server through the Barracuda Load Balancer’s Web interface.
