RB5009 SFP+ 10G оптический и медный DAC с Intel X520-DA1

8 RS name="sfp-sfpplus1" default-name="sfp-sfpplus1" mtu=1500 l2mtu=1514 mac-address=2C:C8:1B:FF:XX:XX  
orig-mac-address=2C:C8:1B:FF:8F:65 arp=enabled arp-timeout=auto loop-protect=default  
loop-protect-status=off loop-protect-send-interval=5s loop-protect-disable-time=5m auto-negotiation=no  
advertise="" full-duplex=yes tx-flow-control=off rx-flow-control=off speed=10Gbps  
bandwidth=unlimited/unlimited switch=switch1 sfp-rate-select=high sfp-shutdown-temperature=95C  

> interface/ethernet/monitor sfp-sfpplus1  
name: sfp-sfpplus1  
status: link-ok  
rate: 10Gbps  
full-duplex: yes  
tx-flow-control: no  
rx-flow-control: no  
sfp-module-present: yes  
sfp-rx-loss: no  
sfp-tx-fault: no  
sfp-type: SFP-or-SFP+  
sfp-connector-type: optical-pigtail  
sfp-link-length-copper-active-om4: 3m  
sfp-vendor-name: AVAGO  
sfp-vendor-part-number: AFBR-7CER03Z-BD1  
sfp-vendor-serial: XXX  
sfp-manufacturing-date: 13-08-22  
sfp-wavelength: 850nm  
eeprom-checksum: good  

А на клиентской стороне:  

$ sudo ethtool ens2  
Settings for ens2:  
Supported ports: /[ FIBRE /]
Supported link modes: 10000baseT/Full  
Supported pause frame use: Symmetric  
Supports auto-negotiation: No  
Supported FEC modes: Not reported  
Advertised link modes: 10000baseT/Full  
Advertised pause frame use: Symmetric  
Advertised auto-negotiation: No  
Advertised FEC modes: Not reported  
Speed: Unknown!  
Duplex: Unknown! (255)  
Auto-negotiation: off  
Port: FIBRE  
PHYAD: 0  
Transceiver: internal  
Supports Wake-on: umbg  
Wake-on: g  
Current message level: 0x00000007 (7) drv probe link  
Link detected: no  

$ sudo ethtool -m ens2  
Identifier: 0x03 (SFP)  
Extended identifier: 0x04 (GBIC/SFP defined by 2-wire interface ID)  
Connector: 0x0b (Optical pigtail)  
Transceiver codes: 0x10 0x00 0x00 0x00 0x40 0x40 0x08 0x40 0x00  
Transceiver type: 10G Ethernet: 10G Base-SR  
Transceiver type: FC: short distance (S)  
Transceiver type: FC: Shortwave laser w/o OFC (SN)  
Transceiver type: FC: Multimode, 62.5um (M6)  
Transceiver type: FC: 800 MBytes/sec  
Encoding: 0x06 (64B/66B)  
BR, Nominal: 10300MBd  
Rate identifier: 0x00 (unspecified)  
Length (SMF,km): 0km  
Length (SMF): 0m  
Length (50um): 0m  
Length (62.5um): 0m  
Length (Copper): 3m  
Length (OM3): 0m  
Laser wavelength: 850nm  
Vendor name: AVAGO  
Vendor OUI: 00:17:6a  
Vendor PN: AFBR-7CER03Z-BD1  
Vendor rev:  
Option values: 0x00 0x12  
Option: RX_LOS implemented  
Option: TX_DISABLE implemented  
BR margin, max: 0%  
BR margin, min: 0%  
Vendor SN: XX  
Date code: 130822  

Когда загружаю/перезагружаю ixgbe (с помощью sudo modprobe -r ixgbe && sudo modprobe ixgbe allow_unsupported_sfp=1 debug=16), получаю:  

[ 6002.933547] ixgbe: Intel® 10 Gigabit PCI Express Network Driver
[ 6002.933549] ixgbe: Copyright © 1999-2016 Intel Corporation.
[ 6003.100831] ixgbe 0000:04:00.0: Multiqueue Enabled: Rx Queue count = 16, Tx Queue count = 16 XDP Queue count = 0
[ 6003.101235] ixgbe 0000:04:00.0: 32.000 Gb/s available PCIe bandwidth (5.0 GT/s PCIe x8 link)
[ 6003.101563] ixgbe 0000:04:00.0: MAC: 2, PHY: 16, SFP+: 5, PBA No: H29295-003
[ 6003.101565] ixgbe 0000:04:00.0: 90:e2:ba:bd:XX:XX
[ 6003.105440] ixgbe 0000:04:00.0: Intel® 10 Gigabit Network Connection
[ 6003.105649] libphy: ixgbe-mdio: probed
[ 6003.106393] ixgbe 0000:04:00.0 ens2: renamed from eth0
[ 6003.286464] ixgbe 0000:04:00.0: registered PHC device on ens2
[ 6003.473490] ixgbe 0000:04:00.0 ens2: detected SFP+: 5
[ 6003.745516] ixgbe 0000:04:00.0 ens2: NIC Link is Up 10 Gbps, Flow Control: RX/TX
[ 6004.645635] ixgbe 0000:04:00.0 ens2: NIC Link is Down

К сожалению, другого 10G железа, чтобы менять, у меня мало, так что я немного в тупике. Это на 7.1rc6, кроме отключения autoneg, не совсем понял, что делать дальше. Пробовал форсировать 1 Гбит, но вторая сторона (Linux) меня не пускает:  

$ sudo ethtool -s ens2 speed 1000 duplex full autoneg off  
netlink error: link settings update failed  
netlink error: Invalid argument  

Есть идеи, в чём может быть проблема? Всё вроде должно работать.