Pcap generated from P4pktgen has empty packets

[aatish17varma]

Hello,

I am trying to use the pcap file generated by P4pktgen by manually passing it to a bmv2 switch using scapy. However, upon inspecting the packets on WireShark, I see that the packets are empty.

Attached is the Wireshark inspection of the packets. Do you know why this is?

[jafingerhut]

Sorry for not noticing this question earlier. From what you see on the screen, it appears that is a 14-byte packet consistent of an Ethernet header, all 14 bytes equal to 0.

That is not the same as an empty packet, i.e. a packet that is 0 bytes in length.

It is true that on a physical Ethernet interface, all frames must be at least 64 bytes long. Any Ethernet frames shorter than 64 bytes should be possible to pad up to 60 bytes long, then add a correct CRC. I don't have a program handy to point you at that can do that, but it would not be difficult to make one.