Dynamic service-based load balancing in a software-defined wide area network (SD-WAN)

A non-transitory computer-readable storage medium embodying a set of instructions, which when executed by one or more processors of a software-defined network (SDN) controller associated with a spoke network of one or more spoke networks of a Software-Defined Wide Area Network (SD-WAN) having a hub and spokes topology, causes the one or more processors to perform a method comprising:

• responsive to registration of a client device with a hub network of the SD-WAN, receiving, by a routing protocol daemon running on the SDN controller, a subnet assigned to the client device by the hub and one or more attributes of a path or a route to a group of clients within the subnet;
• tagging, by the routing protocol daemon, the subnet with a route tag using a route map, wherein said tagging is performed based on the one or more attributes meeting network administrator-defined match criteria for corresponding one or more attributes associated with the route tag in the route map;
• communicating to an SD-WAN daemon running on the SDN controller, by the routing protocol daemon, the tagged subnet via a communication channel between the SD-WAN daemon and the routing protocol daemon;
• responsive to receiving the tagged subnet, translating, by the SD-WAN daemon, an SD-WAN service rule defined with reference to the route tag to a translated SD-WAN service rule defined with reference to the subnet;
• causing, by the SD-WAN daemon, a load balancer associated with a data plane of the spoke network to perform load balancing of incoming network traffic received by the load balancer in accordance with the translated SD-WAN service rule by installing the translated SD-WAN service rule within the load balancer.

A software-defined network (SDN) controller comprising:

• a processing resource;
• and
• a non-transitory computer-readable medium, coupled to the processing resource, having stored therein instructions that when executed by the processing resource cause the processing resource to perform a method comprising:
• responsive to registration of a client device with a hub network of a Software-Defined Wide Area Network (SD-WAN) having a hub and spokes topology, receiving, by a routing protocol daemon, a subnet assigned to the client device by the hub and one or more attributes of a path or a route to a group of clients within the subnet;
• tagging, by the routing protocol daemon, the subnet with a route tag using a route map, wherein said tagging is performed based on the one or more attributes meeting network administrator-defined match criteria for corresponding one or more attributes associated with the route tag in the route map;
• communicating, by the routing protocol daemon, to an SD-WAN daemon the tagged subnet via a communication channel between the SD-WAN daemon and the routing protocol daemon;
• responsive to receiving the tagged subnet, translating, by the SD-WAN daemon, an SD-WAN service rule defined with reference to the route tag to a translated SD-WAN service rule defined with reference to the subnet;
• causing, by the SD-WAN daemon, a load balancer associated with a data plane of a spoke network of the SD-WAN to perform load balancing of incoming network traffic received by the load balancer in accordance with the translated SD-WAN service rule by installing the translated SD-WAN service rule within the load balancer.