I have a linux server with 10G fibre nics:
xyz@xyz48:~$ sudo ethtool p1p1
Settings for p1p1:
Supported ports: [ FIBRE ]
Supported link modes: 10000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: No
Advertised link modes: 10000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: No
Speed: 10000Mb/s
Duplex: Full
Port: Direct Attach Copper
PHYAD: 0
Transceiver: external
Auto-negotiation: off
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: no
For an experiment, I want to set the maximu speed here to 1 Gb.
On searching online I found that this command should do the job:
sudo ethtool -s p1p1 advertise 0x020 speed 1000
But when I run it I get the following error:
Cannot set new settings: Invalid argument
not setting advertise
not setting speed
Anything I am missing? Or is it that form my case I will need to change the driver?
Server details: Intel Xeon based Server
NIC: Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection
Using a 10G SFP+ cable (Arista cab-sfp-sfp-1m)
OS Ubuntu Server 13.10
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