Hot standby for border routers in low-power and lossy networks

A system comprising:

• one or more processors;
• and
• one or more computer-readable storage media having computer-readable instructions stored thereon, wherein the computer-readable instructions, when executed by the one or more processors, cause the one or more processors to:
• determine respective link state information corresponding to each link of a plurality of links between two or more border routers and a plurality of child nodes of the two or more border routers, wherein the two or more border routers and the plurality of child nodes are included in a Destination Oriented Directed Acyclic Graph (DODAG) of a Low-Power Lossy Network (LLN);
• instantiate a virtual rank corresponding to a virtual DODAG root, wherein the virtual rank is different from a respective rank corresponding to each border router of the two or more border routers;
• and
• advertise, by the plurality of child nodes, the virtual rank of the virtual DODAG root to a plurality of additional nodes of the DODAG, without advertising the respective rank corresponding to each border router of the two or more border routers:
• determine consensus information indicative of a current status of each border router of the two or more border routers, wherein the consensus information is based on the respective link state information;
• based on the consensus information, update an election of one or more active border routers from the two or more border routers to utilize as the virtual DODAG root for the LLN;
• and
• route traffic directed to the virtual DODAG root to an active border router of the two or more border routers based on the updated election.

One or more non-transitory computer-readable media comprising computer-readable instructions, which when executed by one or more processors, cause the one or more processors to:

• determine respective link state information corresponding to each link of a plurality of links between two or more border routers and a plurality of child nodes of the two or more border routers, wherein the two or more border routers and the plurality of child nodes are included in a Destination Oriented Directed Acyclic Graph (DODAG) of a Low-Power Lossy Network (LLN);
• instantiate a virtual rank corresponding to a virtual DODAG root, wherein the virtual rank is different from a respective rank corresponding to each border router of the two or more border routers:
• and
• advertise, by the plurality of child nodes, the virtual rank of the virtual DODAG root to a plurality of additional nodes of the DODAG, without advertising the respective rank corresponding to each border router of the two or more border routers;
• determine consensus information indicative of a current status of each border router of the two or more border routers, wherein the consensus information is based on the respective link state information;
• based on the consensus information, update an election of one or more active border routers from the two or more border routers to utilize as the virtual DODAG root for the LLN;
• and
• route traffic directed to the virtual DODAG root to an active border router of the two or more border routers based on the updated election.