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Load Balancing Traffic

Note: This topic applies to the Leeds Release.

Link load balancing (LLB) is the process of sharing traffic originating from IP addresses, across multiple interfaces to increase available bandwidth, maximise throughput, and add redundancy.

Note: This is separate from shaping traffic originating from applications. For a detailed description of how to shape traffic originating from applications, see About Bandwidth Management Shaping. The relevant license is required to install the Bandwidth Management module. For more information, refer to your Smoothwall representative.

If the Smoothwall is only configured to route Internet-bound traffic through a single gateway, you do not need to configure any load balancing pools. Additionally, if there are no specific requirements to route IP address-originated traffic to particular gateways, load balancing pools can be ignored.

Migrated Smoothwall installations, that is, those upgraded from an earlier version, have a pre-defined load balancing pool for the following:

Forwarded — For load balanced outgoing traffic.
Migrated primaries — For load balanced traffic, originating from the previous primary interface, or interfaces.
Web filter — For load balanced, proxied traffic. Note that this pool is only created if Guardian is installed.

Predefined pools are configured to use the maximum available bandwidth for that interface. You can change this to suit your organizational needs. For a detailed description of how to do this, see Load Balancing Traffic .