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Chapter 10: Traffic Management 10.4. Server Load Balancing 10.4.1. Overview The Server Load Balancing (SLB) feature allows the administrator to spread client application requests over a number of servers through the use of IP rules with an Action of SLB_SAT. SLB is a powerful tool that can improve the following aspects of network applications: • Performance • Scalability • Reliability • Ease of administration The principle SLB benefit of sharing the load across multiple servers can improve not just the performance of applications but also scalability by facilitating the implementation of a cluster of servers (sometimes referred to as a server farm) that can handle many more requests than a single server. Note: SLB is not available on all D-Link NetDefend models The SLB feature is only available on the D-Link NetDefend DFL-860E, 1660, 2560 and 2560G. The illustration below shows a typical SLB scenario, with Internet access to internal server applications by external clients being managed by a NetDefend Firewall. 669
