Hi all, I have recently started experimenting with XDP in regards to my master thesis project. I have been playing around with some examples and had a question regarding the following sample file from the linux kernel: https://github.com/torvalds/linux/blob/master/samples/bpf/xdp2_kern.c I have setup a test environment on which I can monitor both my source and destination port using Wireshark. I observe that when I run the example, always returning XDP_PASS, packets go on normal but the MAC swapping does not occur. When using the XDP_TX return code after swapping I observe that I see Ethernet frames appear in wireshark with a source and destination 00:00:00:00:00:00. The IP related headers are gone and this is the only thing I am seeing. For some context, I am running on: 4.11.0-041100-generic x86_64 x86_64 x86_64 GNU/Linux using ConnectX-4 Lx cards with the mlx5_core driver (from lspci -v output). From "systool -vm" output I see my mlx5_core version is "4.0-2.0.0" I was wondering if this behaviour was normal, and if anyone knows what is going wrong here. I am happy to provide some more diagnostic information if needed. Kind regards, Jeffrey
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