I've been testing OVS hardware offloaded ports for a while. I have ConnectX-5 and ConnectX-6 cards in my lab. Iperf tests are looking promising, but when I try to use hardware offloaded ports for krbd traffic, after some time, traffic falls back to the software path. Another interesting thing for me is without changing anything, it can also switch back to the hardware path. This issue mostly occurs while I am doing this test with 3 virtual machines on the same hypervisor.

I'm not sure if this is a configuration issue or I'm hitting to cards limit. If any of you guys are experienced with this all ideas are more than welcome.

Openstack version: Caracal

Operation System: Ubuntu 22.04

Thank you,

Serhat