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The notion of a customizable table of packet matchers and actions is not new with P4. OpenFlow already enables this but the openflow API made it difficult to fu
by hueving 9y ago
The notion of a customizable table of packet matchers and actions is not new with P4. OpenFlow already enables this but the openflow API made it difficult to fully replicate common behaviors of legacy hardware (e.g. ARP).
>This is a threat to Cisco, Brocade, etc. in that it defines a generic architecture for commodity routing hardware.
I'm not so sure about this. OpenFlow and whitebox switches in general already cannibalized the market of customers that would have enough expertise to use P4. It will be interesting to see what customers P4 attracts that whitebox switching already hasn't.