I have a PC with the 82599ES NIC and the TE 2127931-1 SFP+ transceiver to allow a 10Gb connection.
For my project, I need to use one of the port of the NIC with the SGMII interface instead of the XAUI one in order to have a 1Gb connection.
From the NIC datasheet (https://www.intel.com/content/www/us/en/embedded/products/networking/82599-10-gbe-controller-datashe... Intel® 82599 10 Gigabit Ethernet Controller: Datasheet), it seems that it can be done but I can't succeed to make it work.
Indeed, when I use ethtool, I have the following output:
Supported ports: [ FIBRE ]
Supported link modes: 10000baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: No
Advertised link modes: 10000baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: No
Port: Direct Attach Copper
Supports Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
As you can see, there is no 1Gb speed in the supported mode.
Can somebody tell me what I am missing and what should I do to use the SGMII interface ? (note that the port with the 10Gb connection works as expected)
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