Abstract
This paper presents a programmable pipeline based Linux router. Here Linux kernel works as a control plane and the programmable pipeline works as a data plane. The Forwarding Information Base (FIB) lookup is performed using SAIL algorithm. SAIL consumes very large memory. Here we use population counting that reduces the memory consumption of SAIL by up to 80%. We have implemented SAIL in Linux kernel. We also have implemented SAIL using Domino programming language. Our implementation shows that a programmable pipeline can execute SAIL at line rate. We have evaluated our implementation with FIBs from real backbone routers. Our experimental results show that SAIL with population counting is suitable for implementing both dataplane and control plane of a high-speed router.
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