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Server Load Balancing Using Adaptive Routing on an MPLS Enabled Network

As companies demand greater scalability, performance, and availability from their network-based solutions, server load balancing continues to grow in importance. Today a variety of techniques are used to perform load balancing. Two of the most popular are round-robin DNS and content switching. This paper proposes a new load-balancing technique which uses adaptive routing on an MPLS-enabled network. We propose that service requests destined for a web cluster be distributed across the mirrored servers by changing dynamically the route cost metrics. MPLS’s ability to create pinned label-switched paths is used to maintain session persistence. In this paper we present the architecture and operation of this new load-balancing technique. We then compare our new approach to the two most popular load balancing methods.