I am running VMware ESXi 6 on a DL380 G9 server.

It is connected to a gigabit switch set to autonegotiate, but the server only negitiates at 100mb Full Duplex.

I have checked the cables and switch and both are fine. We have even tried another switch

I cannot force the card to 1000mb full duplex because VMware gives the following error

“Error: Forcing 1000Mbps or faster may not be supported on this network device, please use auto-negotiation instead”

No matter what we try we cannot get the speed increased. Can anyone suggest how we might fix this