The invention and evolution of the Dense Wavelength Division Multiplexing (DWDM)technology have brought a breakthrough to high-speed networks ,and it has put a lot of pressure on research in the area of IP routers.Besides ,with up-coming Quality of Service requirements raised by a wide range of communication intensive ,the next-generation IP routers should be QoS-capable. In this paper,we propose a architecture called the Parallel QoS-capable IP Router (PQIR). We address one key design issue in our architecture - the distribution of IP packets to multiple independent routing agents so that the workload at routing agents is balanced and the packet ordering is preserved. We introduce the Enhanced Hash-based Distributing Scheme (EHDS)as the solution. Simulations are carried out to study the effectiveness of EHDS. The results show that EHDS does meet our design goals very well.
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