Currently, QoS at this granularity is not supported in Cumulus Linux. An alternate way of implementing this is to configure the shaper on the host side. The data rates you indicated are low enough to be done in software.
Hey Christian, On second thought, I was interpreting your question as "traffic shaping" (meaning buffer and smooth out bursts). It is certainly possible to configure rate-limiting (policing) where it caps the ingress bandwidth. This function is handled in the cl-acltool. Please check out this link, and let us know if you have any other questions: