Interconnecting multiple separate openflow domains

A system comprising:

• a plurality of separate OpenFlow domains, each of the plurality of separate OpenFlow domains comprising:
• a plurality of endpoint devices;
• a controller device;
• and
• a plurality of edge devices;
• wherein the plurality of endpoint devices from a first OpenFlow domain of the plurality of separate OpenFlow domains is accessible by the plurality of endpoint devices from a second OpenFlow domain of the plurality of separate OpenFlow domains via respective controller devices associated with the first OpenFlow domain and the second OpenFlow domain, and via respective ones of the plurality of edge devices, by sharing local flow information between the respective ones of the plurality of edge devices via direct communications between the respective controller devices associated with the first OpenFlow domain and the second OpenFlow domain,
• wherein the first controller of the first OpenFlow domain includes:
• a CPU, a computer readable memory and a computer readable storage medium associated with a computing device;
• program instructions to receive a packet from an originating endpoint in the first OpenFlow domain destined for a destination endpoint in the second OpenFlow domain;
• program instructions to output a broadcast message including an identifier that identifies the destination endpoint to respective controller devices associated with the separate OpenFlow domains, wherein the outputting the broadcast message causes each of the respective controller devices to query each of a plurality of endpoint devices within each respective separate OpenFlow domain and cause the destination endpoint that matches the identifier to provide a response to the broadcast message to identify flow information for providing the packet to the destination endpoint;
• program instructions to receive the response to the broadcast message from the destination endpoint via a controller device associated with the second OpenFlow domain, wherein the response received is from the destination endpoint device that matches the identifier included in the broadcast message;
• program instructions to update a local flow table identifying a flow for transmitting the packet to the destination endpoint based on the flow information included in the response;
• and
• program instructions to transmit the packet towards the destination endpoint based on updating the local flow table,
• wherein the program instructions are stored on the computer readable storage medium for execution by the CPU via the computer readable memory.