Transcription of P4: Programming Protocol-Independent Packet Processors
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P4: Programming Protocol-Independent Packet Processors
P4: Programming protocol -IndependentPacket ProcessorsPat Bosshart , Dan Daly*, Glen Gibb , Martin Izzard , Nick McKeown , Jennifer Rexford**,Cole Schlesinger**, Dan Talayco , Amin Vahdat , George Varghese , David Walker** Barefoot Networks*Intel Stanford University**Princeton University Google Microsoft ResearchABSTRACTP4 is a high-level language for Programming protocol -inde-pendent Packet Processors . P4 works in conjunction withSDN control protocols like OpenFlow. In its current form,OpenFlow explicitly specifies protocol headers on which itoperates. This set has grown from 12 to 41 fields in a fewyears, increasing the complexity of the specification whilestill not providing the flexibility to add new headers.
nize that many languages are possible, and they will likely share the common characteristics we describe here. For ex-ample, the language needs a way to express how the parser is programmed so that the parser knows what packet formats to expect; hence a programmer needs a way to declare what header types are possible. As an example, the ...
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