Horizontal scaling for a software defined wide area network (SD-WAN)

A system, comprising:

• a non-transitory computer readable memory;
• a processor programmed to cooperate with instructions stored in the memory to perform operations comprising:
• receive a message including a sibling data message that indicates a first connection is related to a second connection, wherein the message is received when the first connection and the second connection are established with a network controller;
• transmit a message to the network controller over the second connection, the message including a second address of the network controller;
• receive the second address of the network controller associated with the second connection over the first connection from the network controller;
• associate the first connection and the second connection;
• and
• in response to receiving a request to connect a network edge device, transmit a message to the network edge device over a single connection, the message identifying a first address of the network controller associated with the first connection and the second address.

A non-transitory computer readable memory storing instructions programmed to cooperate with a processor of a computer system to cause the computer system to perform operations comprising:

• receive a message including a sibling data message that indicates a first connection is related to a second connection, wherein the message is received when the first connection and the second connection are established with a network controller;
• transmit a message to the network controller over the second connection, the message including a second address of the network controller;
• receive the second address of the network controller associated with the second connection over the first connection from the network controller;
• associate the first connection and the second connection;
• and in response to receiving a request to connect a network edge device, transmit a message to the network edge device over a single connection, the message identifying a first address of the network controller associated with the first connection and the second address.