Patent ID: 11888596
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A network controller comprising:
a memory storing instructions; and
one or more processors in communication with the memory, the one or more processors configured to execute the instructions to cause the network controller to:
configure the network controller as a secondary network controller in a controller cluster;
establish an Interior Gateway Protocol (IGP) adjacency relationship between an IGP proxy of the network controller and one or more network elements in the network;
advertise controller information about the network controller to the one or more network elements, wherein the controller information is included in a Controllers Type/Length/Value (TLV), and wherein the Controllers TLV includes a number of controllers field that indicates a number of controllers connected to the network controller;
detect a communication failure with a primary network controller in the controller cluster;
advertise updated controller information about the network controller to the one or more network elements, the updated controller information reflecting a change to the controller information in response to detecting the communication failure;
determine that the primary network controller has failed; and
advertise second updated controller information about the network controller to the one or more network elements when the primary network controller has failed, the second updated controller information promoting the network controller from the secondary network controller to the primary network controller in the controller cluster.