1. A system, comprising: an edge device configured to be operatively connected to a switch fabric, the edge device defining at least a portion of a core portion of a data center, the edge device configured to receive a request for a tunnel value from a source peripheral processing device disposed outside of the core portion of the data center, the request including a physical address value representing a destination of a packet queued at the source peripheral processing device, the tunnel value representing a physical address space including a plurality of physical address values, the physical address value being included in the plurality of physical address values, the edge device configured to determine, in response to the request, the tunnel value without sending the physical address value to the remaining portion of the data center, the edge device configured to send, in response to the request, the tunnel value to the source peripheral processing device.