dcb Tool

For the purposes of verification of flow control setting on the adapter it might be useful to use dcb tool.

Reference page: https://man7.org/linux/man-pages/man8/dcb.8.html

This tool operates on a lower level than lldptool so the outcome might not always be comparable. It is capable of both applying the settings as well as reading out was is being set on the adapter. Below is a bunch of useful exemplary dcb commands: dcb ets set dev eth3 willing on dcb pfc set dev <interface> prio-pfc 0:on 1:on 2:off 3:off 4:off 5:off 6:off 7:off dcb ets set dev <interface> prio-tc 0:0 1:0 2:0 3:1 4:0 5:0 6:0 7:0 dcb ets set dev <interface> tc-tsa 0:ets 1:ets 2:strict 3:strict 4:strict 5:strict 6:strict 7:strict tc-bw 0:50 1:50 2:0 3:0 4:0 5:0 6:0 7:0 dcb pfc show dev <interface> dcb ets show dev <interface>