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Deployment

Barracuda's Load Balancer supports three operating modes, which provides the most flexibility of any load balancer on the market.

Route-path offers the most flexibility. Bridge-path allows deployment without changes to existing IP infrastructure, and Direct Server Return allows up to 10GB throughput, ideal for content delivery networks.

Route-path

The most flexible, and will allow the load balancing of servers that are downstream from the Load Balancer.

With this configuration, the WAN and LAN interfaces of the Barracuda Load Balancer have to be on separate logical networks.

Bridge-path

The simplest deployment to configure. You can place the Load Balancer in line with existing IP infrastructure, and add load balanced servers as required without changing IP addresses.

With this deployment, the WAN and LAN interfaces must be on physically separate networks, with the LAN interface on the same logical switch as the servers that are being load balanced.

Direct Server Return

This provides an optimal throughput configuration, while allowing existing servers to maintain their original IP addresses.

With DSR, the requests come through the WAN interface of the Barracuda Load Balancer - and are then handed directly off to the real servers via the WAN port, while the servers respond directly to the request through their own interfaces.

Implementing this way requires the use of a Loopback adapter placed on the load balanced servers.

LB Topology Requirements By Mode