FLEXIBLE PIPELINE ARCHITECTURE FOR MULTI-TABLE FLOW PROCESSING
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United States of America Patent
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Issued Date -
Jul 6, 2017
app pub date -
Dec 31, 2015
filing date -
Dec 31, 2015
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Abstract
Methods and systems for implementing scalable SDN devices having a flexible data path pipeline having multiple flow tables and a hybrid memory approach are provided. According to one embodiment, an SDN switch performs a method of storing a flow table within a memory device most suitable for the type of rules contained within the flow table. A flow table for use in connection with determining how to process a packet received by the SDN switch is received by the SDN switch. The flow table is stored within a DRAM device of the SDN switch when rules contained within the flow table include keys against which exact matching is performed with fields of the packet. The flow table is stored within a TCAM device of the SDN switch when rules contained within the flow table include keys against which regular expression-based matching is performed with the fields of the packet.
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