I have an 1Gbps connection but the NAS is negotiating with the router on 100Mbps.
02:00.0 Ethernet controller: Broadcom Limited NetXtreme BCM5764M Gigabit Ethernet PCIe (rev 10)
root@NAS:~# ip link show
enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
link/ether 00:26:2d:29:3e:16 brd ff:ff:ff:ff:ff:ff
I have tried ethtool -s enp2s0 speed 1000 duplex full and the connection went Down so i needed to reboot the machine