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Dynamically generating flows with wildcard fields

  • US 10,382,324 B2
  • Filed: 02/27/2017
  • Issued: 08/13/2019
  • Est. Priority Date: 09/15/2013
  • Status: Active Grant
First Claim
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1. For a managed forwarding element, a method comprising:

  • receiving a packet that does not match any entry in a flow cache;

    initializing a new entry, to be stored in the flow cache for processing the packet, with a plurality of wildcard fields;

    modifying the new entry for the flow cache by processing the packet through a set of stages that each comprises sets of rules, by matching the packet against the sets of rules at each stage and un-wildcarding each field of the new entry that corresponds to a field of a rule of the sets of rules in one of the stages that was consulted in matching a field of the packet against the sets of rules; and

    storing the new entry, with at least one wildcard field remaining, in the flow cache to use in processing subsequent packets that match fields of the new entry that are not wildcard fields.

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