Auto-negotiation always off on OL7.3 Linux with "X710 for 10GbE SFP+"

Hello,

The full product name is:

Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 01)

I have a weird problem. My Intel card always shows Auto-negotiation : off .

1) Confirmed network switch is set to on;

2) When I set it manually, it prompted error:

[root@auspldccasssb01 ~]# ethtool -A em1 rx on tx on autoneg on

rx unmodified, ignoring

tx unmodified, ignoring

Cannot set device pause parameters: Operation not supported

[root@auspldccasssb01 ~]# ethtool em1

Settings for em1:

        Supported ports: [ FIBRE ]

        Supported link modes:   1000baseT/Full

10000baseT/Full

        Supported pause frame use: Symmetric

        Supports auto-negotiation: No

        Supported FEC modes: Not reported

        Advertised link modes:  1000baseT/Full

10000baseT/Full

        Advertised pause frame use: Symmetric

        Advertised auto-negotiation: No

        Advertised FEC modes: Not reported

        Speed: 10000Mb/s

        Duplex: Full

        Port: FIBRE

        PHYAD: 0

        Transceiver: external

        Auto-negotiation: off

        Supports Wake-on: g

        Wake-on: g

        Current message level: 0x00000007 (7)

drv probe link

        Link detected: yes

[root@auspldccasssb01 ~]# ethtool -i em1

driver: i40e

version: 1.6.27-k

firmware-version: 6.00 0x8000374f 18.5.17

expansion-rom-version:

bus-info: 0000:01:00.0

supports-statistics: yes

supports-test: yes

supports-eeprom-access: yes

supports-register-dump: yes

supports-priv-flags: yes

[root@auspldccasssb01 ~]# uname -r

3.10.0-693.11.6.0.1.el7.x86_64