Flowshadow: a fast path for uninterrupted packet processing in SDN switches

Updating rules in the flow tables of SDN switches are complex and time-consuming. Therefore, we propose a cache-based scheme (named FlowShadow) to improve the packet processing performance and keep continuous operating while updating rules in the flow tables. FlowShadow caches the microflows in the...

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Bibliographic Details
Published in2015 ACM/IEEE Symposium on Architectures for Networking and Communications Systems (ANCS) pp. 205 - 206
Main Authors Wang, Yi, Tai, Dongzhe, Zhang, Ting, Xu, Boyang, Jin, Linxiao, Dai, Huichen, Liu, Bin, Wu, Xin
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2015
Subjects
Computers
Data structures
Fast Path
Payloads
Radiation detectors
Random access memory
Software-defined Networks
System-on-chip
Technological innovation
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Summary:Updating rules in the flow tables of SDN switches are complex and time-consuming. Therefore, we propose a cache-based scheme (named FlowShadow) to improve the packet processing performance and keep continuous operating while updating rules in the flow tables. FlowShadow caches the microflows in the hash table to build a fast path for packet processing. By leveraging the Action Table, FlowShadow achieves update consistency and good update performance. In order to examine the reliability, validity, utility and scalability of FlowShadow, we implement FlowShadow on the Open VSwitch and conduct numerous experiments with different settings to measure the performance of FlowShadow. The experimental results demonstrate that FlowShadow achieves a lookup speed of 75 million packets per second on a commodity PC under the real backbone traces; the system with FlowShadow speeds up 3.4× times of the original Open VSwitch.
DOI:10.1109/ANCS.2015.7110142