The 1G/10G/25G Switching Ethernet Subsystem IP core provides an option of 32-bit and 64-bit AXI4-Stream interface for the Ethernet MAC+PCS/PMA core configuration. For the 1G/10G switching IP, the 32-bit and 64-bit interfaces are provided. For the 1G/10G/25G switching IP, only the 64-bit interface is provided.