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This paper focuses on designing network processing software for embedded processors. Our design flow CRACC represents an efficient path to implementation based on a modular application description, while avoiding much of the overhead of existing component-based techniques. We illustrate results for a real-world application implementing a full IP-based DSL access multiplexer (IP-DSLAM) system. We quantify overhead and optimization potential incurred by our modular implementation. We also point out how CRACC can be deployed for HW-SW partitioning and design space exploration.