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Dynamically generating flows with wildcard fields

  • US 9,602,398 B2
  • Filed: 10/31/2013
  • Issued: 03/21/2017
  • Est. Priority Date: 09/15/2013
  • Status: Active Grant
First Claim
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1. For a managed forwarding element that forwards packets according to flow entries, a method comprising:

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

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

    dynamically generating the new flow entry by un-wildcarding each match field of the new flow entry that corresponds to a match field that is consulted in matching the packet against a set of flow entries in a set of flow tables, wherein the new flow entry has at least one wildcard field remaining;

    performing a set of actions on the packet according to the new flow entry; and

    storing the new flow entry in the flow cache to process any subsequent packet that matches each non-wildcard field of the new flow entry.

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