The 25Gbps and 50Gbps Ethernet IP cores support a minimum frame size of 64 bytes as required by the IEEE* specifications.
Due to the design of the Intel® 25Gbps and 50Gbps Ethernet IP cores, you may see one or more of the following behaviors for RX frames less than 26 bytes in length (22 bytes payload plus 4 bytes FCS):
- l1_rx_endofpacket may assert one or two clocks before l1_rx_startofpacket
- l1_rx_endofpacket may assert in the same clock cycle as l1_rx_startofpacket
- The short frame may be delivered without l1_rx_error being set
- The frame length and/or payload length fields in the RX status vector (l1_rxstatus_data) could be incorrect