Flattening portal bridge

A system comprising:

• a flattening portal bridge (FPB) having a primary side and a secondary side, wherein the primary side is to couple to a first set of devices addressed according to a first addressing scheme and the secondary side is to couple to a second set of devices addressed according to a second addressing scheme;
• and
• a switch including a plurality of ports, wherein a first port from the plurality of ports comprises the FPB,
• wherein the FPB is to determine whether to route a packet on the primary side or the secondary side based on address information in the packet, wherein the first addressing scheme is to utilize a unique bus number within a Bus/Device/Function (BDF) address space for each device in the first set of devices and the second addressing scheme is to utilize a unique bus-device number in the BDF space for each device in the second set of devices.