How to change network card speed and duplex settings in ubuntu
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ethtool can be used to query and change settings such as speed, auto- negotiation and checksum offload on many network devices, especially Ethernet devices.
In ubuntu if you want to use mii-tool you have to install net-tools package.
Net-tools package includes the important tools for controlling the network subsystem of the Linux kernel. This includes arp, ifconfig, netstat, rarp, nameif and route. Additionally, this package contains utilities relating to particular network hardware types (plipconfig, slattach, mii-tool) and advanced aspects of IP configuration (iptunnel, ipmaddr).
In the upstream package ‘hostname' and friends are included. Those are not installed by this package, since there is a special "hostname*.deb".
Install required packages
sudo apt-get install ethtool net-tools
First you need to find the existing network card speed for this you can use the following command
ethtool eth0
Once you have the current speed and duplex details you can change using the following commands
If you want to setup eth0 10 or 100 or 1000 speed with ethtool try this
sudo ethtool -s eth0 autoneg off speed 10 duplex half
sudo ethtool -s eth0 autoneg off speed 100 duplex full
sudo ethtool -s eth0 autoneg off speed 1000 duplex full
If you want to make it permanent you have to add following lines to /etc/network/interfaces file
gksudo gedit /etc/network/interfaces
Add the following line
pre-up /usr/sbin/ethtool -s $IFACE autoneg off 100 duplex full
Save and exit the file
You need to restart networking services using the following command
sudo networking restart
Funny that this comes along a month after we had to manually set negotiation, duplex, and speed after the Cisco Router we use didn’t let the firewall auto-detect.
Wont work here, I get the following when running ethtool eth0 in terminal…….and I did check that my wired connection is indeed eth0.
Settings for eth0:
Cannot get device settings: Operation not permitted
Cannot get wake-on-lan settings: Operation not permitted
Current message level: 0x00000033 (51)
Cannot get link status: Operation not permitted
@Lvcoyote type sudo ethtool eth0, and then enter your sudo password.
thanx for howto but does not work for me on 14.04 maybe my NIC is damaged
in any case
sudo service network-manager restart
is now the way to restart; the older way no longer works
[email protected]:~$ ethtool enp6s0
Settings for enp6s0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Cannot get wake-on-lan settings: Operation not permitted
Current message level: 0x00000033 (51)
drv probe ifdown ifup
Link detected: yes
[email protected]:~$
Is there a command to tell the Unix distro (Ubuntu for me) to get wake-on-lan working as it belongs and tell me what is the problem as it is working as now. Where can I find more information, because more people have the same problem as I, but I found no examples to get the right solution. This error I have maybe for 3-years now.