Internet Traffic Distribution over Multilink Where High Bandwidth Scalable Switch Port Aggregates Multiple Physical Links
نویسندگان
چکیده
A logical link composed of multiple physical links is in extensive use in today’s Internet and its use is growing due to good scalability, reliability and cost-effectiveness. When IP packets are distributed over such physical links, load unbalancing and packet reordering may occur. Since packet reordering degrades TCP performance, a good traffic distribution method must reduce the amount of reordering as well as packet loss. Hash-based load balancing is simple and ensures no packet reordering, but load unbalancing may occur. We have studied hash-based load balancing methods and analyzed their performances through simulation. We have created a simulation model with OPNET Modeler to generate massive TCP traffic, and then studied the load balancing performance and TCP throughput. The simulation results show that our proposed method, dynamic hashing with flow volume, has the best load balancing performance and minimum impact on TCP throughput. Keywords—Multilink; Internet Traffic Distribution; Packet Reordering; Hashing; TCP Performance
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