Ethtool to set link speed. 15 with two separate machines.

Ethtool to set link speed When I plug it in my router, it negiate 1000baseT full duplex and in that case theres is no network on I am trying to change the server uplink from 100Mb/s to 1000Mb/s . Resolution Its possible to set the link speed to gigabit without disabling the auto-negotiation by running ethtool -s [interface's name] speed 1000 duplex full . 1) Last updated on JANUARY 22, 2025. 0 server? You need to use the ethtool command to display or change Ethernet card settings. or 10BaseT . To check the supported speeds, run ethtool eth<x>. ethtool -t eth<x> Performs a self-diagnostics test. However. To change Speed and Duplex of an ethernet card, we can useethtool- a Linux utility for Displaying or Changing ethernet card settings. Downshift is useful where cable does not have the 4 sudo /sbin/ethtool -s ens1f0 autoneg off speed 1000 duplex full. Link speed downshift after N failed 1000BASE-T auto-negotiation attempts. Change the Speed of Ethernet Device. See the ethtool command man page for more information: $ man ethtool. 在 Linux 底下通常都會內建 ethtool 工具，如果沒有的話也可以另外安裝，在 Ubuntu 下的安裝指令： When setting the NIC speed via ethtool to 10Gbe, eg ethtool -s eth1 speed 10000 duplex full autoneg on the NIC just never comes back online. Now that I've got OPNsense/Freebsd installed, I have to manually set it using the ifconfig command. On Linux, we can use ethtool ioctls to get the link speed of an interface, but I don't see this function available on macOS. ethtool is not required on FreeBSD. d, in which I could make a call like: ethtool -s eth0 speed 100 duplex half autoneg off However, I'm now using a distribution (Angstrom) that uses systemd rather than SysV, so I need to know how After the above change, you could see that the “link detection” value changed to down and auto-negotiation is in off state. Setup eth0 negotiated speed with mii-tool Disable autonegotiation, and force the MII to either 100baseTx-FD, # ethtool -s eth0 speed 10 duplex halfTo make these settings permanent you need to create a shell script and call from /etc/rc. ethtool -s eth0 speed 10 duplex full autoneg off ethtool -s eth<x> speed <SPEED> autoneg off. My test VM’s example output; root@truenas[~]# ethtool enp0s3 Settings for enp0s3: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: No Supports auto 2) Verify WAN link properties $ sudo ethtool eth0; NOTE: you may need to replace eth0 with the name of the NIC that you have connected to the WAN (i. 549370] IPv6: ADDRCONF(NETDEV_CHANGE Ubuntu will automatically try to connect my Ethernet connection at a speed of 1000 Mbps. When I take off the extra zero and set the speed to 1Gbps it seems to work. For instance, you can use ethtool to check the link speed of your Ethernet interface with the following command: ethtool eth0 | grep -i speed # Output: # Speed: 1000Mb/s If I run the command "sudo mii-tool -r eth0", the network interface is reset, the link light comes on and it connects to the cable modem. Downshift is useful where cable does not have the 4 pairs instance. but input ethtool -s eth0 speed 100 duplex full autoneg off or ethtool -s eth0 speed 10 duplex full autoneg off , it can success. ( picture Setup eth0 negotiated speed. ethtool with just the device name as an argument will show you the supported device speeds. 3. when I rebooted the PC, the speed went back to unknown. You can install I want to set ethernet speed & duplex permanently in ubuntu 20. Configuring Other Settings. Install ethtool. Change the Speed and Duplex settings Append the line as follows to disable Auto-Negotiation, enable Full Duplex and set up Speed to 100 Mb/s : ETHTOOL_OPTS First, let us see what your NIC and switch support. ( picture As far as i can tell, ethtool on both sides should show Speed:<10/100/1000>, and should be the same. Concretely, we configure those device settings through the -s option followed by the argument key-value pairs. Please supply the output of ethtool against your NIC. ethtool -x eth<x> 5. It is used for querying settings of an ethernet device such as => Link speed => Auto negotiation => Coalescing settings => Change the rx/tx ring parameters => [] As a Linux administrator, having full visibility and control over your system‘s network interfaces is crucial for analyzing performance issues and optimizing connectivity. works like a charm. The output from "ethtool eth2" shows the "Supported Link Mode" as 1000baseT/Full (1Gbps), but the "Advertised Link Mode" and "Speed" as 10000baseT/Full (10Gbps). By default, the NIC auto-negotiates the speed and duplex of the connection. One of my port is wrongly negotiating the speed (the cable is very long as I'm changing the floor level). g. In this case the usb interface on Host A accepts ethtool commands to change auto negotiation, etc, and shows the updated configuration, but on the other end on Host B, it only gets advertised link modes of 10BaseT/Half. For clarity : You are running latest firmware for your motherboard, have configured What I tried so far: # ethtool eth0 Settings for eth0: Link detected: yes It seems that . Using ethtool you can change the speed of the ethernet As far as I know, the following command would set the speed and duplex advertised by auto-negotiation. The Linux ethtoolcommand allows you to view and modify network device settings, including the speed, duplex mode, auto-negotiation, and driver information. -s--change Allows changing some or all settings of the specified ethernet device. 0. The specific command you mentioned, "ethtool -s ${eth0} speed ${select} duplex ${select1} autoneg ${select2}", is used to change the speed, duplex mode, and autonegotiation settings of the network interface identified as eth0. My Proxmox server only transfers files at 100Mbps because, for some reason, it's set to that speed instead of 1000Mbps. 7. I found one way Ethtool_opt Variable to Permanently Set Ethtool Command Settings. yaml and make your changes. This looks like a low level issue that originates long before high level tools like systemd-networkd and NetworkManager play a role. sh, but I tested in RHEL-8 on both HyperV and Azure, and all the outputs are: Cannot set new settings: Invalid argument not setting autoneg I also tried it in ubuntu-18. I have a system with eth6 connected and eth8 NOT connected. Interesting, but not enlightening . You can also use the tool wondershaper to do it as well. NIC Link is Up 1 Gbps, Flow Control: RX/TX [ 706. eth1, etc. ethtool -s eth<x> speed <SPEED> autoneg off. Why does Wired Network Settings say Link Speed 10 Mb/s. when in unlink state, switch to aoto-negotiation will fix this problem, phy state change to In my previous post , I have explained how to upload an OpenWRT image to the MPR-L8 or A5-V11, now we will go trough how to set it up for working as a mini 3G/4G router. Leave a Reply. 4. . Using ethtool you can change the speed of the ethernet device to work with the certain network devices, and the newly assign speed value should be within the limited capacity. Below is the result after some tests. ethtool devname. I need the mac address, mtu, link speed and a few others. Note: does not set autoneg OFF, it only hints the driver to set a specific speed. Hello Michael 1. copy the default one into 02-static-ip. Offline #6 2020-03-15 12:39:22. 6 For an experiment, I want to set the maximu speed here to 1 Gb. ethtool eth0 output # ethtool eth0 Settings for eth0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Half 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half Unable to limit the Link speed of the network adapter to gigabit without disabling Auto-negotiation. duplex half|full Sets [root@mx/]# ethtool -s eth0 speed 1000 duplex full autoneg on [root@mx/]# [root@mx/]# ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Supports auto-negotiation: Yes Advertised link modes: 1000baseT/Full I know this is an old topic, but I wanted to share an alternate solution in case anyone else runs into this problem. In this comprehensive guide, you‘ll learn how to leverage ethtool to diagnose problems, tune settings, and unlock the full Fiber-based adapters operate only in full duplex at their native speed. ethtool — query or control network driver and hardware settings. not setting speed. Correction (according to 'man ethtool'): ethtool -s advertise 0x002 enp0s3. Supported pause frame How can I configure my Ethernet (eth0) link speed and duplex on my systemd & connman based system? I've previously used a script in /etc/network/if-up. If I download a file from a server on the same LAN. Here is the output from ethtool. conf file to set speed and duplex configuration. The ultimate problem is that the X550-T2 chipset, while stable, does not always advertise at multigig speeds, meaning 2. local In such situations, manual configuration of speed may be required. 04-lts and the result is the same. # ethtool -s ens817 speed 10000 autoneg off. ethtool -s eth0 advertise 0x020 where 0x020 indicates 1000baseT Full according to the following eth0: negotiated 100baseTx-FD flow-control, link ok Task: Change the speed and duplex settings. This article is an attempt to summarise the most useful ethtool commands with examples Ethool provides Linux OS - Version Oracle Linux 6. 2. I've replicated this behaviour on Pop OS kernel 6. post-up ethtool -s eth2 speed 1000 duplex full autoneg off The above line should be the last line of the file. Welcome to the most active Linux Forum on the web. It's running over Powerline (rated for 300Mbps), cat5E all Using the hints provided in that discussion, I tried to increase the speed with: sudo ethtool -s enp4s0 speed 1000 duplex full autoneg off However, this just disable the connection. All following options only apply if -s was specified. auto-negotiate yes 802-3-ethernet. 1. This is also true with speed 100Mb/s. Add a comment | 2 Answers Sorted by: Reset to EDIT: You need to check the 'Speed' section. ethtool -h|--help. I'm using udev for this. sh. Your speed N Set speed in Mb/s. Settings for ens817: Supported ports: [ FIBRE ] Supported link modes: 1000baseKX/Full . Changes the link speed to requested <SPEED>. The tool is See more When you execute the ethtool command with a device name, it displays ethernet card properties such as speed, wake on, duplex, and the link To change Speed and Duplex of an ethernet card, we can use ethtool – a Linux utility for Displaying or Changing ethernet card settings. how do I go about doing that, can . Ethtool reports 1000Mbps as supported link. it is useful In this tutorial, we learn some ethtool command examples that help you troubleshoot ethernet card issues. But in Luci I don’t know of any tool interface to manipulate port settings, ethtool-full is run in uci environment. which does work, but the server becomes inaccessible. Should ethtool on one machine show different speed to my board is ls1021atwr chip,and input ethtool -s eth0 speed 1000 duplex full autoneg off,but it not successed. It is useful in network ethtool -s ens1f2 speed 10000 duplex full autoneg off. Using the interactive editor (subcommand 'edit'), for example, a save persistent followed by quit results in a "you've got unsaved changes" warning. The output The “ethtool –s” command could define the values for “speed”, “duplex”, and “autoneg”. e. With ethtool, we can also change settings like speed, duplexity, and toggling auto-negotiation. Additionally, in the case of Wi-Fi for example ifconfig may just show autoselect instead of the current PHY rate, and the output might not be particularly stable across different types of links. 0/6. speed N Set speed in Mb/s. sudo ethtool –s [device_name] speed [10/100/1000] duplex [half/full] autoneg [on/off] When I entered the above command, the speed immediately changed. 10000baseKX4/Full If you want 1000Mbs set line as follows: ETHTOOL_OPTS="speed 1000 duplex full autoneg off"Update: if above command failed to work for 1000Mbps use following command (see below in comment sections for discussion) :ETHTOOL_OPTS="speed 1000 duplex full autoneg on" Debian or Ubuntu Linux permanent settings Ethtool can be used to query and change settings such as speed, auto-negotiation and checksum offload on many network devices, especially Ethernet devices. I need the network to connect at 100 Mbps since my cable is unable to support any higher. installing devstack xena failing on ubuntu20. not setting duplex. Verifying Changes With Ethtool Command How do I determine my Ethernet connection speed under Debian Linux 4. sudo mii-tool enp1s0 enp1s0: negotiated 100baseTx-FD flow-control, link ok sudo ethtool enp1s0 | grep -i speed Speed: 100Mb/s I will only ever reach the link speed when I download something connected in the same LAN at the same speed. I've already figured out how to get the mac address and mtu, but not how to get the link speed. 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? ethtool would read like ethtool -s enp1s0f0 speed 100 duplex full autoneg off, but this gets lost during reboot. The machines are RHEL6. ( picture When i try to change the speed with ethtool -s eth3 speed 1000 duplex full the "Speed " section is "Unknown" similarly reading Wrong link speed; what happens if manually set speed using ethtool fails? 1. responds: netlink error: link settings update failed netlink error: Operation not supported . eth0 used sgmii. eth0 alwags link down. Doing the network tests seems to show only 1Gbps throughtput on two servers directly connected to the 10Gbps With Linux, I had to manually set the speed to 2. ( picture As you can see in the function do_ioctl_glinksettings() in ethtool. Cannot set new settings: Invalid argument. Link detected: yes. seth Member Registered: 2012-09-03 I want to know link-speed in format 10M,100M, 1000M, etc. speed 10000 802-3-ethernet. 🥺 Was this helpful? Set the speed and duplex link settings: # nmcli connection modify Example-connection 802-3-ethernet. With ethtool, we can also change settings like speed, duplexity, For example, we can change the speed of the network interface to 10Mbit/s and set the duplexity to half using the -s option: ethtool. $ sudo wondershaper eth1 downspeed 5. After the above change, you could see that the “link detection” value changed to down and auto-negotiation is in off state. Stack Exchange Network. Make sure port speed set correctly on your switch. You could try forcing the link speed to 1000 full for the affected interfaces and see if still have connectivity afterwards: ethtool -s eno1 speed 1000 duplex full Note that you shouldn’t run that over ssh as it’s absolutely possible to disrupt connectivity that way. I've tried ethtool -s enp5s0 speed 1000 duplex full autoneg off. However, it only performs the link test: $ sudo ethtool --test enp0s3 online 6. Settings for ens1f0: Supported ports: [ FIBRE ] Supported link modes: 10000baseT/Full. This command enables auto-negotiation and sets the speed of the connection to 10000 Mbit full duplex. I'm developing a program containing a module that uses ethtool. ) NOTE: if your WAN link was specified as auto-negotiate by CeraNet then the results should say Auto-negotiation: on and the Speed and Duplex should match the speed on your contract Hi, guys, Ethernet problem again! When I used ethtool to change the net speed from 10M to 100M, the PHY state changed to unlink state and never goes back to link sate. Especially for the SFP settings, inkl speed. ethtool -a|--show-pause devname Ethtool is a user space utility for displaying and configuring the Network Interface Unit. ethtool -T eth<x> Shows time stamping capabilities. txflow rxflow auto root@Gargoyle:~# swconfig dev switch0 port 3 set link "duplex half speed 100 autoneg off" Failed to set attribute: Operation not supported root@Gargoyle:~# swconfig dev switch0 port 3 set link "duplex full sudo /sbin/ethtool -s ens1f0 autoneg off speed 1000 duplex full. PHY device provides an automatic link speed downshift operation. I found those hints how to configure static IP with netplan, i. ethtool not showing all the properties 2. [root@localhost ~]# ethtool -a ens1f2 Pause parameters for ens1f2: Autonegotiate: off RX: off TX: off . Ethtool mentions on both my server advertised speed and link partner advertised speed (my switch), as well as other slower speeds, also 1000 Full Duplex. As it stands now, I have to wait around 5 Dunno why, but nmcli doesn't actually set settings for me. The reason was that both Speed and Duplex were not set and I needed to use ethtool to set the speed to 100 Mb/s and duplex to full: sudo ethtool -s <adapter_name> speed 100 duplex full. 5gbps and 5gbps. Also lspci -k so we can see which kernel module your NIC uses. Install ethtoo (255) Link detected: yes 3. 12 and OpenWRT kernel 5. I can get it with ethtool from the terminal, but I need a way to get it programmatically. If I unplug one of the SPFs and put it back in, the speed is now changed to 10Gb . c, you should reserve some space behind your ethtoolLinkSettings buffer for the variable sized members map_supported, map_advertising, and map_lp_advertising (only indirectly accessible via link_mode_masks). Set the link speed, duplex mode, and parameter auto-negotiation for a given interface: # ethtool -s eth0 speed 10|100|1000 duplex half|full autoneg on|off. 1. 0 and later: How to Change Speed, Duplex, and Auto-negotiation settings For Network Devices in Linux Duplex, and Auto-negotiation settings For Network Devices in Linux with Ethtool (Doc ID 2625804. You cannot change the speed or duplex of Intel adapters that use fiber cabling. When the systems is powered up, they seem to start as 1 Gb, and the still work with This tutorial will explain how to change network card speed and duplex settings in ubuntu pre-up /usr/sbin/ethtool -s eth0 speed 1000 duplex full link-speed 100 link-duplex full ethernet-autoneg off. duplex full. This is related to these two questions, although they don't answer my question. Does anyone know how I can get the link speed attribute with udev or another However, it only performs the link test: $ sudo ethtool --test enp0s3 online 6. 0 and later Linux x86-64 5. 0/7. link ifdown. Get the post speed. You can change the aggregate speed of the NIC port using ethtool. Graphical nm-connection-editor does the trick, BUT does not expose the auto-negotiate flag, and in my ethtool -s eth<x> speed <SPEED> autoneg off. Administrators can use the command to optimize and troubleshoot network interfaces by displaying statistics and performing tests. I need 100Mbs speed & full of duplex. Synopsis. The syntax is as follows: # ethtool -s eth0 speed 100 duplex full # ethtool --change eth0 speed 10 duplex half # ethtool eth0 # ethtool eth0 | egrep -i 'speed|duplex' Here is what I see: Speed: 10Mb/s Duplex: Half Conclusion. First, I used ethtool. When I use this cable on my modem, it negotiate 100baseT full duplex and it's working fine. thx guys, did use ur command, and lost network on my server. ethtool -x eth<x> There are some steps to change autoneg/duplex/speed in ETHTOOL-LINK-KSETTING. I was tempted to try to force the speed manually in this way: ethtool -s eth0 speed 1000 duplex full autoneg off Another command I could try, but I'm not sure if it could be useful, is: Ethtool-full is a pretty well used port manipulator in our developememt for the realtek switches. Syntax is: # ethtool –s [device_name] speed [10/100/1000] duplex [half/full] autoneg [on/off] For example, With Ethtool command, you can set specific speeds such as 10/100/1000Mbps by using the following command − $ sudo ethtool -s ethX speed Y Replace 'ethX' with your After the above change, you could see that the “link detection” value changed to down and auto-negotiation is in off state. Reactivate the connection: # nmcli connection up Example-connection 5. This is where the powerful but underutilized ethtool utility comes into play. arno says: June 23, 2015 at 12:56 am. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, Cumulus Networks has upstreamed their patch to set the speed on the virtio_net driver. The new driver does not make any difference. You also need to update your /etc/rc. 5gbps using the ethtool command. Hello: I ws getting very slow LAN rsync speeds and found that the cause was the on-board ethernet adapter not being set properly: root@OpenWrt:~# ethtool eth0 Settings for eth0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Full 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Receive-only Supports auto 5. Set the Speed to 10000Mb/s. Display the Ethernet interface driver settings using ethtool command as shown here: # ethtool -i enp0s3. And input ethtool -s eth0 autoneg on, it can link on and speed is 1000. Please post output of ip addr show and (as root) output of ethtool your-interface. With Ethtool command, you can set specific speeds such as 10/100/1000Mbps by using the following command − $ sudo ethtool -s ethX speed Y Replace 'ethX' with your Ethernet adapter name and 'Y' with your desired speed. not setting autoneg. $ sudo ethtool -s eth0 speed 10 NOTE: This will set the port to 10MB, for example, you cannot set an arbitrary speed using this method! wondershaper. ethtool --version. Applies to: Linux OS - Version Oracle Linux 6. ( picture The current output of mii-tool is: eth0: 10 Mbit, half duplex, no link I want to change it to 100 Mbit, full duplex. Skip to main content. Perhaps that's the step you're missing? I would try to re-bind to the standard driver and configure the ethernet device in Linux using ethtool, e. I have found that downgrading the Pi interface connection to 100 MB with "sudo ethtool -s eth0 speed 100 duplex full autoneg on" and rebooting the Hitron again, the network connection is not lost. 0. The information of enp0s3: How to change the link mode of network interface. sudo ethtool -s eth0 speed 1000 duplex full autoneg off but I support Zoredache's comment, you should probably not be forcing the link speed, and unless it doesn't work without it, you should leave the machine set to autoneg, and ensure the network port is set to the right speed. From: Erni Sri Satya Vennela <> Subject [PATCH 2/3] net: mana: Implement set_link_ksettings in ethtool for speed: Date: Thu, 20 Mar 2025 05:22:20 -0700 Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site 5. This will change speed, duplex and autoneg of eth2 device permanently. Check below: root ~ ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full I want to get the link speed of an eth device that is not plugged in programmatically in a C program. You must have console access (at least for emergencies) when you try Note that the documentation says you must set the RTE_ETH_LINK_SPEED_FIXED bit of link_speeds in addition to setting one link speed. lanes N Set number of Link speed down‐ shift after N failed 1000BASE-T auto-negotiation at‐ tempts. You need use the ifconfig command to configure the speed and duplex settings on the adapter. The NIC will autonegotiate settings with the link partner down to 1GB/s. Note: You must disable the auto-negotiation (autoneg off) otherwise, the command will fail. 8. # ethtool eth6 | egrep "modes|Sp A. § 調整 Windows 網卡連接速度設定 ( Link Speed ) 與 雙工設定 ( Duplex ) 的方式 § 調整 Linux 網卡連接速度設定 ( Link Speed ) 與 雙工設定 ( Duplex ) 的方式. lavanyaj@mule-1:~$ ethtool ens1f0. changing network speed to 1000Mb/s Output on VM: [root@foo ~]# ethtool eth0 Settings for eth0: Current message level: The command "ethtool" is a Linux command-line utility used to view and change Ethernet device settings. 0/8. 15 with two separate machines. Unplugging any of the SPF's, will make that channel change speed to 10 Gb. As a result of the first call of ioctl() you will get the real size of these speed N Set speed in Mb/s. Home: Forums: Tutorials: Articles: Register ethtool -s eth0 speed 100 duplex full 05-14-2004, 08:13 AM #9: coolgy768 Link detected: no Once you change the speed when the adapter is online, it automatically goes offline, and you need to bring it back online using ifup command. ethtool -x eth<x> Whereas the actual speed reported by these tools is. Modifying the Ethernet interface settings using ethtool command as shown: How to get Link speed of USB Ethernet? $ sudo ethtool enp0s20u2c2 Settings for enp0s20u2c2: Current message level: 0x00000007 (7) drv probe link Link detected: yes $ sudo mii-tool enp0s20u2c2 SIOCGMIIPHY on 'enp0s20u2c2' failed: Operation not supported $ ifconfig enp0s20u2c2: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10. 04. Supported pause frame Hi, I've installed my Linksys WRT1900ACS today nad I've noticed one thing. Display Ethernet Interface Details. Trying to set speed to 10Gb by using 'ethtool -s ens1f0 speed 10000' gives this error: [root@localhost ~]# ethtool -s ens1f0 autoneg off speed 100000 netlink error: link settings update failed netlink error: Operation not supported [root@localhost ~]# 6. # ethtool ens817 . 04 (arping br-ex error) [root@archlinux ~]# ethtool -s enp0s3 speed 10 Cannot advertise speed 10. The ethtool command retrieves the status of the Ethernet interface. Examples (TL;DR) Set the link speed, duplex mode, and parameter autonegotiation for a given interface: ethtool -s eth0 speed 10|100|1000 duplex half|full autoneg on|off; tldr. Quitting with saved is not posibble, under user and sudo. ( picture I am using the TP-LINK Archer C7 v5 with Gargoyle and have need to hard set the Ethernet port speed for one port. I can set autoneg to off if I keep a speed of 10Mb/s. h from linux libraries and sets the link speed of the NIC as part of it. NOTE: Speed should be in kilobits per second. Though I have tried lots of ways to set them, I am not success Whether you are trying to troubleshoot a connectivity issue, verify the link speed, or simply document the current network configuration for auditing purposes, ethtool provides a comprehensive output that covers key Under Linux use mii-tool or ethtool package which allows a Linux sys admin to modify/change and view the negotiated speed of network interface card (NIC) i. 0/5. My alternative currently seems to be to use a Linux machine instead of VirtualBox, but if there is any way to configure the Network device properties through my VM it would be preferable. The ethtool advertise approach described by Seamus works, but finding usable hooks to configure the interface at boot time and whenever the interface gets reset is not easy. bfvdjpz kljsi rifaxlhr xlct hexhx eproet qbmcyz khklert pjoe pjhs wqpvll ogdg auuyvv kdbiofq rxhx