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?

Hi!

Could you try to set the speed and duplex?

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

where:
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