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NETWORK TRAFFIC CLASSIFICATION
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has been added to the hardware’s flow table, packets can be processed
immediately without any expensive host memory copies.
Software Design
e OpenFlow reference switch (either the software version or the
hardware acceleration) needs to be modified to perform the flow fea-
ture extraction for the traffic classifier and to interface with the net-
work flow processor (NFP). is requires an entire new subsystem
CPU
OpenFlow switch
First packet
Flow table
PCIe
(a)
CPU
OpenFlow switch
Flow table
PCIe
Subsequent packets
Figure 13.7 OpenFlow switch software behavior. (a) The processing of the ...