Hi Long, > The message "Failed to allocate Tx DevX UAR (BF)" is diagnostic, not error. Thanks - do you have any comment on the qdisc messages or do we just safely ignore these as well? We are using the rdma-core from ppa:canonical-server/server-backports (33.1-1ubuntu1~backport20.04-202103240925~ubuntu20.04.1). Regards, Tyler