Auto-negotiation not support

every time I make a change on a port, it always shows this warning
WARNING: changing auto-negotiation setting on “eth2” is unsupported!

I am using Intel(R) 10G 2P X520 Adapter, installed latest RR version.
I even hard set the port to FULL 10Gbps, yet it keeps on happening.

The port randomly flaps too for 1 to 2 seconds.

Any one experiencing the same problem?


Could you try to set the speed and duplex?

set interfaces ethernet eth2 speed xxx
set interfaces ethernet eth2 duplex full

xxx speed (in Mbit) of the eth2 interface NIC
1000 for 1Gbit cards, 10000 for 10Gbit cards

I already did that before posting here. Will wait for few weeks and see if it becomes stable