Re: XDP in virtual Ethernet devices

Thank you for the reply!
After experimenting more the problem is not related to docker 
specifically but to the docker networks. When I run the same experiment 
outside a docker network I am able to capture packets, however, when the 
containers are deployed in a docker network I cannot capture packets. 
Does anyone know why this might happen? Or was able to capture the 
packets of docker containers inside networks?
Best Regards,
Sebastião Amaro

A 2021-06-01 14:12, Toke Høiland-Jørgensen escreveu:
> Sebastião Santos Boavida Amaro
> <[email protected]> writes:
> 
>> Hello!
>> I am trying to use xdp_stats[1] (this program prints packets
>> passed/dropped) on the ethernet devices created by docker
>> containers(veth). I have iperf exchanging messages between containers
>> but xdp_stats does not capture any of the packets (XDP_PASS values do
>> not change) and CPU usage goes to 100%. It works fine on my laptop's
>> network device, but I have these issues with the docker network 
>> devices
>> and I don't understand why.
> 
> I don't think there's anything special about the veth devices Docker
> creates; so my immediate thought would be that this is due to
> differences in the kernel versions you're running on your laptop vs on
> docker. Some more details on this would be required to say anything
> more, though...
> 
> -Toke