> Thanks, So you're saying a retransmit is not observed specifically when you're bursting traffic, but it is more random on normal load?
Yes seem like just a normal load.
> What flow steering mode are you using ? you can check dmesg when the driver loads or copy paste content in /etc/modrporbe.d/mlnx.conf
Not seeing anything related to 'steering' in the dmesg output (see below for an example) and no /etc/modrporbe.d/mlnx.conf file
> is FC enabled on switches ?
FC = Fiber Channel? if so, then no - switch is an Arista DCS-7150S.
> Can you capture /proc/interrupts supposedly when you see a retransmit counter increment in netstat ?
Yes, I'll try to get this Monday on one of the servers.
Thanks for your help Erez. -- Bud