Hi! I tested the patch and it seems to work. Disabling HW offload does not seem to work. I performed my test by sending ICMP packets between two stations connected by a switch on a dedicated VLAN. I noticed that tcpdump does not detect that the PCP field is modified on the sending station. On the other hand, the network capture on the receiving station shows that the PCP field is modified. -- Best regards, Kevin Vigouroux