Patents by Inventor Gareth R. Douglas

Gareth R. Douglas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dedicated egress fast path for non-matching packets in an OpenFlow switch
    Patent number: 9299434
    Abstract: A first packet of a flow received onto an OpenFlow switch causes a flow entry to be added to a flow table, but the associated action is to perform a TCAM lookup. A request is sent to an OpenFlow controller. A response OpenFlow message indicates an action. The response passes through a special dedicated egress fast-path such that the action is applied and the first packet is injected into the main data output path of the switch. A TCAM entry is also added that indicates the action. A second packet of the flow is then received and a flow table lookup causes a TCAM lookup, which indicates the action. The action is applied to the second packet, the packet is output from the switch, and the lookup table is updated so the flow entry will thereafter directly indicate the action. Subsequent packets of the flow do not involve TCAM lookups.
    Type: Grant
    Filed: January 9, 2014
    Date of Patent: March 29, 2016
    Assignee: Netronome Systems, Inc.
    Inventors: Gareth R. Douglas, Ciaran J. Toal, Sandra Scott-Hayward
  • DEDICATED EGRESS FAST PATH FOR NON-MATCHING PACKETS IN AN OPENFLOW SWITCH
    Publication number: 20150194215
    Abstract: A first packet of a flow received onto an OpenFlow switch causes a flow entry to be added to a flow table, but the associated action is to perform a TCAM lookup. A request is sent to an OpenFlow controller. A response OpenFlow message indicates an action. The response passes through a special dedicated egress fast-path such that the action is applied and the first packet is injected into the main data output path of the switch. A TCAM entry is also added that indicates the action. A second packet of the flow is then received and a flow table lookup causes a TCAM lookup, which indicates the action. The action is applied to the second packet, the packet is output from the switch, and the lookup table is updated so the flow entry will thereafter directly indicate the action. Subsequent packets of the flow do not involve TCAM lookups.
    Type: Application
    Filed: January 9, 2014
    Publication date: July 9, 2015
    Applicant: NETRONOME SYSTEMS, INC.
    Inventors: Gareth R. Douglas, Ciaran J. Toal, Sandra Scott-Hayward