xdp-traffic generator not generating traffic to any interface

Question

xdp-traffic generator not generating traffic to any interface

s4ndroar opened this issue 5 months ago · comments

xdp-trafficgen udp --dst-mac aa:bb:cc:dd:ee:ff --dst-addr fe80::1 --dst-port 10000 wlan0

Transmitting on wlan0 (ifindex 2)
lo->wlan0 0 err/s 0 xmit/s
lo->wlan0 0 err/s 0 xmit/s
lo->wlan0 0 err/s 0 xmit/s
lo->wlan0 0 err/s 0 xmit/s
lo->wlan0 0 err/s 0 xmit/s
lo->wlan0 0 err/s 0 xmit/s

uname -r
6.8.5-arch1-1

sniffing the traffic on both interfaces also shows zero packets.

Toke Høiland-Jørgensen · Answer 1 · Tue Apr 23 2024 04:50:32 GMT+0800 (China Standard Time)

s4ndroar ***@***.***> writes:

# xdp-trafficgen udp --dst-mac aa:bb:cc:dd:ee:ff --dst-addr fe80::1 --dst-port 10000 wlan0

xdp-trafficgen requires XDP support on the target interface, which WiFi devices do not have...

s4ndroar · Answer 2 · Tue Apr 23 2024 16:23:28 GMT+0800 (China Standard Time)

"Is virtual Ethernet interface not supported?" It also not generating any packet for it.

I was able to generate traffic for ethernet interface. Would be nice to test it in machines using Virtual Ethernet interface.

Toke Høiland-Jørgensen · Answer 3 · Wed May 01 2024 05:13:03 GMT+0800 (China Standard Time)

s4ndroar ***@***.***> writes:

"Is virtual Ethernet interface not supported?" It also not generating any packet for it.

For veth you need to either enable GRO on veth peers, or load a dummy XDP program on the *other* side of the veth pair (i.e., on the device that would receive the traffic).