Patent ID: 9667524
Date: 2017-05-30
CPC Classifications: H04L

Claim:
1. A method to check health of previously discovered controllers comprising: a. a first controller directly sending a first controller-advertisement message to a second controller with a solicit flag set indicating it is expecting a response, where the second controller receives the first controller-advertisement message and updates information in a first controller information base (CIB) associated with the second controller to indicate that a first state associated with the first controller is set to “live”; b. the first controller receiving the response directly from the second controller, the second controller sending the response as a second controller advertisement message carrying a second information required to identify and directly access the second controller with the solicit flag cleared indicating that the second controller is not expecting a return response; and c. the first controller receiving the second controller-advertisement message and updating information by setting a second state associated with the second controller to “live” in a second CIB associated with the first controller.