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An approach is provided in which a number of inter-unit communication connections are detected between a rack-mounted system unit and adjacent rack-mounted system units. The connections are established by a set of electrical contacts selected from a set of available electrical contacts included on s

An approach is provided in which a number of inter-unit communication connections are detected between a rack-mounted system unit and adjacent rack-mounted system units. The connections are established by a set of electrical contacts selected from a set of available electrical contacts included on surfaces of the rack-mounted system unit. The set of electrical contacts is determined by physical masks inserted between the rack-mounted system unit and adjacent rack-mounted system units. A configuration of rack-mounted system units is identified including the rack-mounted system unit and the adjacent system units rack based on an arrangement of the inter-unit communication connections.

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1. A computer implemented method comprising: detecting a plurality of inter-unit communication connections established between a first rack-mounted system unit and one or more adjacent rack-mounted system units, wherein the connections are established by a set of electrical contacts selected from a

1. A computer implemented method comprising: detecting a plurality of inter-unit communication connections established between a first rack-mounted system unit and one or more adjacent rack-mounted system units, wherein the connections are established by a set of electrical contacts selected from a larger plurality of available electrical contacts that are included on one or more physical surfaces of the first rack-mounted system unit, and wherein the set of electrical contacts is determined by one or more physical masks inserted between the first rack-mounted system unit and one or more of the adjacent rack-mounted system units;generating, at the first rack-mounted system unit, a bitwise representation of a configuration of rack-mounted system units included in a system rack that includes the first rack-mounted system unit and the one or more adjacent system units rack based on an arrangement of the plurality of inter-unit communication connections;selecting one or more ports on the first rack mounted system unit based upon the bitwise representation; andprocessing one or more signals at the first rack-mounted system unit utilizing the selected one or more ports. 2. The method of claim 1 wherein each of the physical masks includes one or more apertures that allow the plurality of inter-unit communication connections. 3. The method of claim 1 further comprising: receiving one of the signals at a selected one of the inter-unit communication connections from one of the adjacent rack-mounted system units. 4. The method of claim 3 further comprising: identifying, based on the bitwise representation, that the received signal is directed to a second rack-mounted system unit included in the system rack;selecting an output port included in the selected one or more ports that corresponds to the second rack-mounted system unit based on the bitwise representation; andtransmitting the signal to the second rack-mounted system unit via the selected output port. 5. The method of claim 3 further comprising: identifying, based on the bitwise representation, that the received signal is directed to the first rack-mounted system unit; andhandling the received signal by the first rack-mounted system unit. 6. The method of claim 1 further comprising: receiving a request to send one of the signals to a second rack-mounted system units included in the system rack; andtransmitting the signal to the second rack-mounted system unit via an output port included in the selected one or more ports. 7. The method of claim 6 wherein the second rack-mounted system unit is not one of the one or more adjacent system units. 8. An information handling system comprising: a first rack-mounted system unit housed in a system rack, the first rack-mounted system unit comprising: a plurality of physical surfaces, wherein one or more of the physical surfaces includes a plurality of available electrical contactsone or more physical masks inserted between the first rack-mounted system unit and one or more of adjacent rack-mounted system units also housed in the system rack;one or more processors;a memory coupled to at least one of the processors;a set of instructions stored in the memory and executed by at least one of the processors in order to perform actions of: detecting a plurality of inter-unit communication connections established between the first rack-mounted system unit and one or more of the adjacent rack-mounted system units, wherein the connections are established by a set of electrical contacts selected from the plurality of available electrical contacts allowed by the one or more physical masks;generating, at the first rack-mounted system unit, a bitwise representation of a configuration of rack-mounted system units included in a system rack that includes the first rack-mounted system unit and the one or more adjacent system units rack based on an arrangement of the plurality of inter-unit communication connections;selecting one or more ports on the first rack mounted system unit based upon the bitwise representation; andprocessing one or more signals at the first rack-mounted system unit utilizing the selected one or more ports. 9. The information handling system of claim 8 wherein each of the physical masks includes one or more apertures that allow the plurality of inter-unit communication connections. 10. The information handling system of claim 8 wherein the set of instructions performs additional actions comprising: receiving one of the signals at a selected one of the inter-unit communication connections from one of the adjacent rack-mounted system units. 11. The information handling system of claim 10 wherein the set of instructions performs additional actions comprising: identifying, based on the bitwise representation, that the received signal is directed to a second rack-mounted system unit included in the system rack;selecting an output port included in the selected one or more ports that corresponds to the second rack-mounted system unit based on the bitwise representation; andtransmitting the signal to the second rack-mounted system unit via the selected output port. 12. The information handling system of claim 10 wherein the set of instructions performs additional actions comprising: identifying, based on the bitwise representation, that the received signal is directed to the first rack-mounted system unit; andhandling the received signal by the first rack-mounted system unit. 13. The information handling system of claim wherein the set of instructions performs additional actions comprising: receiving a request to send one of the signals to a second rack-mounted system units included in the system rack; andtransmitting the signal to the second rack-mounted system unit via an output port included in the selected one or more ports. 14. The information handling system of claim 13 wherein the second rack-mounted system unit is not one of the one or more adjacent system units. 15. A computer program product stored in a computer readable medium, comprising functional descriptive material that, when executed by an information handling system, causes the information handling system to perform actions that include: detecting a plurality of inter-unit communication connections established between a first rack-mounted system unit and one or more adjacent rack-mounted system units, wherein the connections are established by a set of electrical contacts selected from a larger plurality of available electrical contacts that are included on one or more physical surfaces of the first rack-mounted system unit, and wherein the set of electrical contacts is determined by one or more physical masks inserted between the first rack-mounted system unit and one or more of the adjacent rack-mounted system units;generating, at the first rack-mounted system unit, a bitwise representation of a configuration of rack-mounted system units included in a system rack that includes the first rack-mounted system unit and the one or more adjacent system units rack based on an arrangement of the plurality of inter-unit communication connections;selecting one or more ports on the first rack mounted system unit based upon the bitwise representation; andprocessing one or more signals at the first rack-mounted system unit utilizing the selected one or more ports. 16. The computer program product of claim 15 wherein each of the physical masks includes one or more apertures that allow the plurality of inter-unit communication connections. 17. The computer program product of claim 15 wherein the actions further comprise: receiving one of the signals at a selected one of the inter-unit communication connections from one of the adjacent rack-mounted system units. 18. The computer program product of claim 17 wherein the actions further comprise: identifying, based on the bitwise representation, that the received signal is directed to a second rack-mounted system unit included in the system rack;selecting an output port included in the selected one or more ports that corresponds to the second rack-mounted system unit based on the bitwise representation; andtransmitting the signal to the second rack-mounted system unit via the selected output port. 19. The computer program product of claim 17 wherein the actions further comprise: identifying, based on the bitwise representation, that the received signal is directed to the first rack-mounted system unit; andhandling the received signal by the first rack-mounted system unit. 20. The computer program product of claim 15 wherein the actions further comprise: receiving a request to send one of the signals to a second rack-mounted system units included in the system rack; andtransmitting the signal to the second rack-mounted system unit via an output port included in the selected one or more ports.