An interface identification system includes an IHS enclosure including a plurality of IHS slots and a plurality of input/output (I/O) switching module slots. A connection plane provides interconnects between the plurality of IHS slots and the plurality of I/O switching module slots. An I/O switching module includes a plurality of interfaces. The I/O switching module may be coupled to a first I/O switching module slot and, in response, retrieve first I/O switching module slot information about the first I/O switching module slot, retrieve IHS information about IHSs located in the plurality of IHS slots that are interconnected with the first I/O switching module slot through the connection plane, and use the first I/O switching module slot information and the IHS information to identify each of the plurality of interfaces on the I/O switching module that is coupled to an IHS by that IHS and the first I/O switching module slot.