Patents by Inventor Don R. Heidrich

Don R. Heidrich 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).

  • Method and system for path monitoring using segment routing
    Patent number: 9369371
    Abstract: A method and system are disclosed for use of segment routing in monitoring of a network path. In one embodiment, the method includes selecting a plurality of segment identifiers and assembling the segment identifiers into a segment identifier stack, where the segment identifier stack encodes a test path within the network for attempted routing of a test message. The method may further include inserting the segment identifier stack into a header associated with the test message, and forwarding the test message according to an entry in a forwarding table corresponding to the segment identifier at the top of the segment identifier stack. Interior gateway protocol advertisements may be used to communicate segment identifiers for creating or updating of the data structure or the forwarding table. In an embodiment, the system includes one or more network interfaces and a processor configured to perform the steps of the method.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: June 14, 2016
    Assignee: Cisco Technologies, Inc.
    Inventors: Clarence Filsfils, Daniel C. Frost, Stewart F. Bryant, Don R. Heidrich
  • METHOD AND SYSTEM FOR PATH MONITORING USING SEGMENT ROUTING
    Publication number: 20140269266
    Abstract: A method and system are disclosed for use of segment routing in monitoring of a network path. In one embodiment, the method includes selecting a plurality of segment identifiers and assembling the segment identifiers into a segment identifier stack, where the segment identifier stack encodes a test path within the network for attempted routing of a test message. The method may further include inserting the segment identifier stack into a header associated with the test message, and forwarding the test message according to an entry in a forwarding table corresponding to the segment identifier at the top of the segment identifier stack. Interior gateway protocol advertisements may be used to communicate segment identifiers for creating or updating of the data structure or the forwarding table. In an embodiment, the system includes one or more network interfaces and a processor configured to perform the steps of the method.
    Type: Application
    Filed: May 30, 2014
    Publication date: September 18, 2014
    Applicant: Cisco Technology, Inc.
    Inventors: Clarence Filsfils, Daniel C. Frost, Stewart F. Bryant, Don R. Heidrich