Systems and methods for stateless symmetric forwarding

A method, comprising:

• determining a first cluster state of a first plurality of border routers in a first cluster, wherein the first cluster is located between a core network and a first regional network;
• determining a second cluster state of a second plurality of border routers in a second cluster, wherein the second cluster is located between the core network and a second regional network;
• generating a network level consistent hash based on the first cluster state and the second cluster state;
• receiving, by a first border router of the first plurality of border routers in the first cluster, a packet from a node in the first regional network;
• selecting, from the first plurality of border routers and the second plurality of border routers, an owner border router using the network level consistent hash;
• and
• routing the packet to the owner border router.

One or more computer-readable non-transitory storage media embodying instructions that, when executed by a processor, cause the processor to perform operations comprising:

• determining a first cluster state of a first plurality of border routers in a first cluster, wherein the first cluster is located between a core network and a first regional network;
• determining a second cluster state of a second plurality of border routers in a second cluster, wherein the second cluster is located between the core network and a second regional network;
• generating a network level consistent hash based on the first cluster state and the second cluster state;
• receiving, by a first border router of the first plurality of border routers in the first cluster, a packet from a node in the first regional network;
• selecting, from the first plurality of border routers and the second plurality of border routers, an owner border router using the network level consistent hash;
• and
• routing the packet to the owner border router.