ALEXANDRIA, Va., July 21 -- United States Patent no. 12,689,578, issued on July 21, was assigned to Charter Communications Operating LLC (St. Louis).

"Redundant configuration and failover testing for flexible nodal layer three overlay of layer two traffic" was invented by Timothy Bleidorn (Colorado Springs, Colo.) and Tomas Lovato (Denver).

According to the abstract* released by the U.S. Patent & Trademark Office: "Redundant configuration and testing for flexible nodal layer 3 overlay of layer 2 traffic. A network deployed at a site includes a local network to carry layer 2 traffic, a pair of layer 3 tunnel instantiation devices in a failover configuration. Each layer 3 tunnel instantiation device encapsulates the layer 2 traffic into lay...