Ethtool does not show speed. I've also tried running ifup enp5s0.
Ethtool does not show speed However, network interface names can vary. If you're paranoid about Linux VM not showing right speed, you can Basically I know how to enable it ad hoc, using ethtool -s enp11s0f0 speed 2500 duplex full autoneg on . This indicates to me that the router indeed supports 1000 Mbps. 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. Changes the link speed to requested <SPEED>. I can ping the eth1 ip address from the box itself but not from anywhere else on the network, and nor can the box ping anything anywhere else. I can get it with ethtool from the terminal, but I need a way to get it programmatically. No problem, I tried it in a secondary rig running Windows and that didn't show up either via device manager. sudo ethtool -g eth2 To display duplex speed, enter: # ethtool eth1 Output: Settings for eth1: Supported ports: ethtool, mii-tool and dmesg output show very different results . Finally, type to view final configuration: On RHEL ES4u6 32bit, when I execute “ethtool eth0” it does NOT give me the speed, which I desire to know. disable_mc_loopback - when this flag is on, multicast traffic is not redirected to the device by Description: When running Linux guest VMs using VirtIO NIC drivers on AHV, some NIC details, such as Speed and Duplex information, are missing from ethtool command output: Settings for eth0: Supported ports: [ ] Supported link modes: Not reported Supported pause frame use: No Supports auto-negotiation: No Supported FEC modes: Not reported Advertised link I honestly do not know :) Last time I tried to manage the link states, I also checked the "modern # ethtool -s ethX speed SPEED_MODE duplex DUPLEX_MODE autoneg NWAY_OPTION ,where SPEED_MODE = 1000 for 1000Mbps = 100 for 100Mbps = 10 for 10Mbps DUPLEX_MODE = half for half-duplex = full for full-duplex NWAY_OPTION = off for auto sudo ethtool eth0 Settings for eth0: Supported ports: [ MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Speed: 10Mb/s. ip link show eth0 For detailed speed information, pair it with ethtool. The switchd process keeps the hardware and kernel in sync for the important port settings (speed, auto-negotiation, and link detected) when they change. I can not use tools like ethtool or mii because my system does not have a such tools and I can not install them. ethtool --show-priv-flags eth<x> Shows driver private flags and their states (ON/OFF) The private flags are: qcn_disable_32_14_4_e. If you try to run ‘ethtool’ and receive a ‘command not found’ error, it means that ‘ethtool’ is not installed on your system, or it’s not in your system’s PATH. Speed and Duplex can not be determined. Your example for 1000 speed will not work. Please add a comment to show your appreciation or feedback. 5Gb and 5Gb, to resolve this I used ethtool -s enp4s0f0 advertise 0x1800000001028. # ethtool eno1 Settings for eno1: Supported ports: [ FIBRE ] Supported link modes: 10000baseT/Full enp65s0f0: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 1500 ether 00:0a:f7:58:53:30 txqueuelen 1000 (Ethernet) RX packets 194530523 bytes 257836045953 (240. 0 supports-statistics: yes supports-test: no supports-eeprom-access: no supports-register-dump: no supports-priv On a Red Hat VM, if I disconnect the NIC, ethtool immediately shows Link detected: no instead of Link detected: yes, and ip link show shows <NO-CARRIER,BROADCAST,MULTICAST,UP> instead of <BROADCAST,MULTICAST,UP,LOWER_UP>, but ifconfig -a shows UP BROADCAST MULTICAST MTU:1500 Metric:1, which is the same as when the NIC is connected. ETHTOOL_OPTS="speed [100|1000|10000] duplex [half A proper cable, category 5, 5e or 6. Vivek Gite is an expert IT Consultant with over 25 years of experience, specializing in Linux and open source solutions. You will need to query this information on the hypervisor host itself. Although the duplex mode cannot be accurately detected, the end of the On my Debian and CentOS VM's, SCP transfers between VM's are only going at 1GBs and ethtool does not show the Speed: Debian output: $ ethtool -i eth0 driver: virtio_net version: 1. 5gbps using the ethtool command. I need help to get running my ethernet to 1000Mb/s. ethtool -s eth0 autoneg off speed 1000 duplex full . 04: Just use a command like: ethtool eth0 to get the needed info. 153255] mt7530 mdio-bus:1f lan1: Link is Up - 1Gbps/Full - flow control rx/tx But every attempt to ask it has failed. OPTIONS ethtool with a single argument specifying the device name prints current settings of the specified device. Looking at your ethtool output for eno1, it appears that the only supported and advertised link modes are 1000 base T full, and auto ethtool vmbr0 is a good piece of advice, thank you. 0/5. After having received some advice, I'd like to dig into the config of the ethernet port by using ethtool 5. 注意：适配器在线时一旦更改速度，适配器会自动离线，您需要使用 ifup 命令将其恢复在线。 sudo ifup enp7s0 Finally, test the ethtool from command line and make sure it switches the speed without any issue before trying it from the script because it might not be a problem with your script but with the driver or card or anything. What is important is that you have all four pairs (eight wires) properly connected. In the previous step, we used ethtool to check the network speed, assuming the interface name was eth0. b)If that does not fix it, run a cable directly between the NIC and the switch. Therefore reporting the speed of the physical NIC would be inaccurate. 90. 04 Here my spec: lspci -nnk | grep 0200 -A3 21:00. I want to find out the duplex mode / speed of an etherenet interface or a bridge interface. whatever you are connecting to does NOT have auto-negotiation turned However, I don't think that's your entire problem, because eno1 has no link detected with ethtool, and ethtool should show a link for an online interface that's part of a bridge even though the UI does not. ethtool -T eth<x> Shows time stamping capabilities. PHYAD: 1. 0 server? You need to use the ethtool command to display or change Ethernet card settings. 3 server. There are a couple of ways to get the bytes read by the eth0 interface: ethtool is used for querying settings of an ethernet device and changing them. 1 GiB) RX errors 132100 dropped 168682 overruns 0 frame 132100 TX packets 237154363 bytes 214077589016 (199. 0/7. The DHCP server is deactivated, all clients have static IPs. I use ethtool to show its capabilities: ethtool enp1s0f0 Settings for enp1s0f0: Supported ports: [ FIBRE ] Supported link mo Therefore I am not able to create a BOND. With Linux, I had to manually set the speed to 2. The network is connected, but the ethtool shows the below information. From expert mode try ethtool -m (interfacename). Output includes driver, firmware, and package version. see what speeds are supported for each port using ethtool. For example, to disable autoneg and force 100Mbps full-duplex on ens18: sudo ethtool -s ens18 speed 100 duplex full autoneg off. ethtool --set-eee ethX eee off. 7. after that, but that solved nothing. changing network speed to 1000Mb/s Output on VM: [root@foo ~]# ethtool eth0 Settings for eth0: Current message level: So this is the same problem I ran into where the supported link modes do not translate to the advertised link modes. To solve this issue, you can install ‘ethtool’ using your package manager. On my Debian and CentOS VM's, SCP transfers between VM's are only going at 1GBs and ethtool does not show the Speed: $ ethtool -i eth0 driver: virtio_net version: 1. The process does not function when a device with enabled auto-negotiation connects to a device that is not using this signaling mechanism. all the three guest vnet are showing 10mbps - see the below output for one vnet [root@kvmserver /]# ethtool vnet1 Settings for vnet1: Supported ports: Supported link modes: Supports auto Cannot get current device settings: Operation not supported not setting speed not setting duplex not setting autoneg' im not able to change my duplex setting to full alos im not able to see my interface settings sudo ethtool wlo1 Settings for wlo1: Link detected: yes only link status is shown sudo ethtool -i wlo1 driver: rtl8723be version: 5. If you do not need the extra enhancements due to a low noise environment or shorter The following solutions which have been proposed on other sites do NOT work for this purpose: Using 'ifconfig' - since a network cable may be connected but the network not properly configured or not currently up. Thats all I have done. 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 where <adapter_name> is the name that shows for the adapter when using ip # 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. This will override the auto-detected defaults and force 100Mbps/Full. 0 supports-statistics: yes supports-test: no supports-eeprom-access: no supports-register-dump: no On another machine (with some embedded Realtek NIC), changes from up to down make the remote switch se a brief disconnection, but the switch sees the link then come back up. ethtool eth0 | grep -A 1 -i speed. The Ethtool does not recognize all types of cables, so for some cables it shows the EEPROM memory map This is related to these two questions, although they don't answer my question. If the link is up on one port, the driver does not allow the other port to be set to a different speed. Allows to configure the interface speed to (1000) duplex mode to (full) and auto negotiation (enabled) ethtool – show-fec eth<x> # ip link show dev eth0 |awk '/link/{print $2}' dc:a6:32:b2:8b:11 4) Check speed of a network interface. It's the on-board X550-T2 adapter that does not automatically negotiate to 2. This port named eth0 should run at 1 Gbit/sec speed (at least the doc of the cluster box tells me that) but the router tells me that it only runs at 100 Mbit/sec. Running ethtool results in stderr spew as seen in the title. For clarity : You are running latest firmware for your motherboard, have configured Without looking at the switch, the only way it seems possible is if the windows driver for your NIC reports this information. Sholander 2 August 2018 18:06 3. what does this show? ethtool wlan0. Additionally, we can also toggle the state ethtool --cable-test devname ethtool --cable-test-tdr devname [first N] [last N] [step N] [pair N] ethtool --show-tunnels devname ethtool --show-module devname ethtool --set-module devname [power-mode-policy high|auto] ethtool --get-plca-cfg devname ethtool --set-plca-cfg devname [enable on|off] [node-id N] [node-cnt N] [to-tmr N] [burst-cnt N When a device, with enabled auto-negotiation, connects to a device that is not using this signaling method, the process does not work. ethtool --show-eee ethX. I have not changed any settings on the router regarding ports. ethtool -x eth<x>. . It is used for querying settings of an ethernet Replace the cable, check connectors on switch and server for dust or any other thing which may block good connection, check that the switch has autonegotiation enabled for that port and also try forcing speed on the switch to 100Mbps. 10 you should see something like this with ethtool -m: # ethtool --show-features eth0. Is there a way to force auto-negotiation to be enabled? 0 You should be able to change the advertised speed to only link with partners that will support that I placed the first card into my machine, checked lspci and it does not show up at all. For example My computer has a 10/100/1000 network-card inside, and the speed is 1000 when the computer runs. ethtool -s eth1 advertise 0x0f would allow all 10/100 modes but not 1G. It looks like it is not receiving any packets at all. On Gaia 3. 6, they do not show network speed. Trying to enable auto-negotiation using ' ethtool –s enp74s0f0np0 autoneg on' does not work. first off mii-tool -v eth0 Output eth0: negotiated 10baseT-HD, link ok If not it Ethtool utility is used to view and change the ethernet device parameters. That’s Hi Team, Base System shows that it has 10G card connection. Display the Ethernet interface driver settings using ethtool command as shown here: # ethtool ethtool --set-priv-flags eth<x> <priv flag> <on/off> Enables/disables driver feature matching the given private flag. Shoop. See the ethtool command The switch hardware contains the active port settings. [rage@RageStation rdma]$ ethtool enp2s0d1 Settings for enp2s0d1: Supported ports: [ FIBRE ] Supported link modes: 1000baseKX/Full 10000baseKX4/Full 10000baseKR/Full 40000baseCR4/Full 40000baseSR4/Full 56000baseCR4/Full 56000baseSR4/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Supported FEC For speed details, combine it with ethtool or check the RX and TX statistics for performance trends. 5 gbps: "ethtool -s [interface name] speed 2500 duplex full" provided that 2. 5GB as expected. Attend my Gateway Performance Optimization R81. arm) CoreELEC:~ # ifconfig lo Link encap:Local Loopback Also please provide output of ethtool (interfacename) and ethtool -i (interfacename). 16, but the tool seems not to find the network interface: Recently added a Broadcom 5711 dual port 10G NIC to my Redhat 5. 5 gbps. I did not find any clues online or in the logs. 0. # ethtool eth0 Settings for Hi, In command line, how do I read the state of the port ? The switch is the MT7530 inside the MT7621 chip system message show alone: [ 630. 3. To see if it does, go to Control Panel --> Administrator Tools --> Event Viewer. ethtool handles IRQ based communication with associated devices to manage related channels settings in # ethtool --show-channels enp1s0 Channel parameters for enp1s0: Pre-set maximums: RX: 4 TX: 3 Other: 10 Combined: 63 Current hardware So the link does not appear up, despite what the hardware says. For example, to disable auto-negotiation and fix the link speed to 1gbps, do the following. 此外，您可以单独更改每个选项： sudo ethtool -s enp7s0 speed 100 sudo ethtool -s enp7s0 duplex full sudo ethtool -s enp7s0 autoneg on. In this tutorial, we learn some For Windows VM, you do need to install RedHat virtIO drivers manually to actually get, as well as display 10G speed. In this step, we'll use the ip link show command to When using ethtool -s to manually set the "Port" to MII on the main server, it looses all connectivity and does not show "Speed" or "Duplex". This type of traffic can, and frequently does, exceed the speed of the physical NIC. Running ethtool eno1 shows that advertisted link modes is all. Logically if I have already configured my Network switch with 10G speed for all the required ports, In Prism also it should reflect as 10G even if that NIC is supported 10/25G speed. ) This might or might not have something to do with preparing for Wake-on-LAN or such, but I've really no idea. And I want to change them also. 5 (S912. On a test partition with the latest Current packages, when booting directly to init 1 the network link is not initialized. The ip command is modern and replaces ifconfig. If you have older cable (e. Please post output of ip addr show and (as root) output of ethtool your-interface. List eth0 physical interface settings using sys-apps/ethtool: root # ethtool eth0. Manually set the speed and use your DAC and connect port 1 to port 2 and see if it This looks like a low level issue that originates long before high level tools like systemd-networkd and NetworkManager play a role. After that, it correctly negotiated with the cable modem to 2. The bug does not manifest when booting to My Proxmox server only transfers files at 100Mbps because, for some reason, it's set to that speed instead of 1000Mbps. (ethtool does show "no link" on the PC side, though. 0/6. If ethtool does not report the expected link speed, disable auto-negotiation by explicitly specifying the link speed. Hi vikas if you are interested in speeding up your network speed or need to check the network speed with ethtool ,You may need to change the network driver as explained here. 0 supports-statistics: yes supports-test: no supports-eeprom-access: no supports-register-dump: no ethtool --set-priv-flags eth<x> <priv flag> <on/off> Enables/disables driver feature matching the given private flag. ‘ethtool’ Command Not Found. The kernel definitely detects the card, otherwise there would be no eth1. Also lspci -k so we can see which kernel module your NIC uses. ) January 1, 2024, 2:18pm sudo ethtool -s enp7s0 speed 100 duplex full autoneg on. Digging further I found that mii-tool and ethtool do not agree on the link speed. The next command disables Auto-Negotiation, enables Half Duplex and sets up Speed to 10 Mb/s: # ethtool -s eth0 speed 10 duplex half autoneg off. What does it mean? I cannot get the 10G speed? How do i make sure i am getting the full 10G network speed? here is the ethtool eth1: ===== Here at Arzhost, we discuss the Ethtool command change speed duplex ethernet card Linux to modify the settings. The machines are RHEL6. a) Test this first with a new, known good cable between wall socket and network card. A common need is changing speed, duplex mode, and autonegotiation to resolve compatibility issues or force specific settings. It turns out that the following command will change the advertised speed for an interface to 2. Ex: If you get "Speed: Unknown!" you may be using the wrong ethXX name, worth a double check :) This only gives you the negotiated speed of your current network configuration (hence your ethernet port There's no "set speed" that a virtio-net interface obtains. ethtool -T eth<x> ethtool --show-eee devname ethtool --set-eee devname [eee on|off] [tx-lpi on|off] [tx-timer N] [advertise N] DESCRIPTION ethtool is used to query and control network device driver and hardware settings, particularly for wired Eth‐ ernet devices. It's not the modem that's the problem. 10. 3ad mode bond-mode 4 bond-lacp-rate Recently I've been suspecting that something is misconfigured as cacti graphs never appear to show more than 100mbit of traffic on the link. I’ve played with the options, but don’t see anything obvious that forcefully ethtool --show-priv-flags eth<x> Shows driver private flags and their states (ON/OFF). This enables advertising at 100BASE-T, 1000BASE-T, 2500BASE-T, 5000BASE-T and 10000BASE-T. He writes about Linux, macOS, Unix, IT, programming, infosec, and open source. -h- I used Arwen’s suggestion resulting in ethtool -s enp4s0f1 speed 10000 duplex full. Additionally, my X550’s do not autonegotiating at 2. Anyway, Am i doing something 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 Network interface eth2 does not work properly and needs to be used. which does work, but the server becomes inaccessible. However, I could not turn off the auto-negotiation (which seems recommended from @waltinator comment); if I run the command: sudo ethtool -s <name_of_card> autoneg off speed 2500 duplex full or: sudo ethtool -s <name_of_card> If Duplex is showing half, then type: sudo ethtool -s eth0 autoneg off sudo ethtool -s eth0 duplex full. I know this because it didn't do so even when I had Linux, rather than OPNsense/FreeBSD, installed. However, many of the fields in ethtool, like Supported Link Modes and Advertised Link Modes are not thx for confirming, yes i think too they can be ignored as they do not represent the mode i want to use (10Gbase-r/usxgmii)but strange that link_up is reported, but ethtool does not show the link ericwoud (Eric W. Settings for eth0: 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 I solved this by changing an ethtool setting. Check under proxmox > network in the webgui to verify the devices are showing up and gather the correct device names, it may not simply be "enp1s0f0" for you. 162 45 NAS but it's not uncommon for the LEDs to show different states/colours depending on negotiated/configured speed. 6. Show EEE state. cat3) then Gbit speeds will (actually: should) not work. The cable category is relative unimportant as Category-5e will work at gigabit. I've tried ethtool -s enp5s0 speed 1000 duplex full autoneg off. Outgoing frames destined for another VM on the same network, running on the same host will not use the physical NIC. If you have ethtool installed (in repos) you can use this command to get your link speed: $ sudo ethtool eth0 | grep -i speed Speed: 100Mb/s bandwidth (kernel) You want to see your bandwidth speed. IP address assigned only to: bond0 (do not assign any IP address to eth0 and eth2 interfaces) How to setup a bonding device on Ubuntu Linux #pre-up /usr/sbin/ethtool -s bond0 speed 1000 duplex full autoneg on post-up ifenslave bond0 eth0 eth2 pre-down ifenslave -d bond0 eth0 eth2 bond-slaves none # 802. or this for just the output you want I think. g. 0 Ethernet controller [0200]: Intel Corporation I211 Gigabit Network ethtool --show-priv-flags eth<x> Shows driver private flags and their states (ON/OFF). To check the speed of a particular network interface port, use the following command: # sudo ethtool eth0 |grep "Speed:" Speed: 10000Mb/s. 5gbps. Display the network usage statistics for an interface: 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. ethtool -x eth<x> On my Debian and CentOS VM's, SCP transfers between VM's are only going at 1GBs and ethtool does not show the Speed: Debian output: $ ethtool -i eth0 driver: virtio_net version: 1. 0/8. Show Ring parameter. The router has not many options anyways. Nothing: but it does not show wlan0 speed: CoreELEC (official): 8. Note: <autoneg off> does not set autoneg OFF, it only hints the driver to set a specific speed. The next command disables Auto-Negotiation, enables Full Duplex and sets up Speed to 100 Mb/s: # ethtool -s eth0 speed 100 duplex full autoneg off 4. root@OpenWrt:/# swconfig dev switch0 port 0 show $ sudo ethtool --pause s2-eth3 autoneg off rx off tx off Cannot get device pause settings: Operation not supported $ sudo ethtool --change s1-eth1 speed 1 Cannot set new settings: Operation not supported not setting speed Executing ethtool with an active link gives the following: #ethtool enp74s0f0np0. To check the supported speeds, run ethtool eth<x>. Under kernel 2. ethX is the name of the ethernet device on which ethtool should operate. You can change network card speed, auto-negotiation, wake on LAN setting, duplex mode using this tool in Linux. You then want to look at the System logs (in Windows7 this is under the Windows Logs tree). 0 firmware-version: expansion-rom-version: bus-info: 0000:00:12. Once you found the System logs, click on Source at the top to use as the I have a optical X710 NIC which runs in 10,000Mb/s speed (SFP+). My question is, How come only one NIC is showing 10G speed & rest of them with 25G. disable_mc_loopback - when this flag is on, multicast traffic is not redirected to the device by Dear all SPICEHEADS Why do KVM guests show vnet interface link speed as 10Mbps Scenario is - One host OS is linux and 3 guest (windows os) on this KVM qemu. Ping a host - since the product will be within a LAN using an unknown network configuration and unknown hosts. advertise N Sets the speed and duplex advertised by autonegotiation. Auto-negotiation: on. Transceiver: external. The supported speeds reported by ethtool do not show gigabit speeds, only 10/100 Half/Full duplex. I've also tried running ifup enp5s0. If both devices do not support 1000Base then they will lower themselves to the maximum supported. Duplex: Full. The end of the connection with an active auto-negotiation is still able to detect the speed of the other end, but cannot correctly detect the duplex mode. ethtool -t eth<x> Performs a self-diagnostics test. 4. Port: MII. I'm using udev for this. ethtool -s ethX speed 25000 autoneg off. I have checked in both CentOS/RHEL 5. Does anyone know how I can get the link speed attribute with udev or another ethtool -s eth<x> speed <SPEED> autoneg off. 1. The ethtool utility manages the link speed and related settings of a network interface card. ethtool -i ethX. It's a software implementation of a network interface, it obtains the fastest possible speed it can, and that speed will vary The ethtool command is used to display/change Ethernet adapter settings. Ethtool was updated and picked up a bunch of new command line switches in Gaia kernel 3. $ sudo ethtool --show-pause enp0s3 Pause parameters for enp0s3: Autonegotiate: on RX: on TX: off $ sudo ethtool -s enp0s3 speed 50 duplex half Cannot advertise speed 50 duplex half. By default, the Ethtool attempts to parse the output of the EEPROM and show it in a human-readable way. This works, but only for the current session, if I reboot the setting is Verify interface with ip link show. ethtool with just the device name as an argument will show you the pre-up /usr/sbin/ethtool -s eno1 speed 1000 duplex full autoneg off However after a reboot it doesn't seem to have effect. speed N Set speed in Mb/s. 5 gbps is a supported speed. Does anyone have any solution for this. The output of ethtool swpXX shows the port settings stored in the kernel. When you execute ethtool command with a device name, it displays the following information about the ethernet device. If I manually run ethtool -s eno1 speed 1000 duplex full autoneg off and look at ethtool eno1 it only reports advertised link mode 1000baseT/Full. Force the speed to 25G. Changing the speed and duplex settings of an Ethernet card in Linux can help optimize network performance, resolve connectivity issues, and define how effectively your servers communicate. While it doesn’t directly show speed, it provides insights into link states. The ethtool command How do I determine my Ethernet connection speed under Debian Linux 4. Supports Wake-on: g. How much of the total speed you're using over a given amount of time. 238798] mt7530 mdio-bus:1f lan1: Link is Down [ 656. 20 course CET (Europe) Timezone Course Scheduled for July 1-2 # ethtool -s eth0 autoneg on. ETHTOOL_OPTS=”speed 1000 duplex full sudo ethtool -s <name_of_card> speed 2500 The command above raises the speed to 2. My system is Ubuntu 22. If the switch is old it may have a mix of ports at different speeds. 3 GiB) TX errors 0 dropped 0 overruns 0 carrier I need the mac address, mtu, link speed and a few others. This has been tested on Fedora 40 and Ubuntu 24. But ethtool seems capable of telling the driver what speed/duplex modes to advertise. 4. I'm fairly confident ip addr was reporting 1000 for some reason (it's fixed now so I can't confirm) I've just built a spare machine and it's connecting at 10Mbit (yes, 10, not 100 or 1000) on 2 different ethernet cables too, I'll have to have a play and see what on earth is going on, but this has helped diagnose why a backup sudo ethtool -s eth0 speed 1000 duplex full autoneg off then in ethtool speed is Unknown and it doesn't work; if I set it via pre-up it wont work either Please help!! Thanks! (Your NIC) AND your switch or router support 1000Base. You need to follow the instructions in my first post to fix it. Network interface port speed can only be verified in Linux using the ‘ethtool’ command. The 'Supported Mode' says : 1000T/Full. Using ip. ethtool not showing all the properties 2. I've already figured out how to get the mac address and mtu, but not how to get the link speed. lets talk. Seems like there would be some other way to find in a Virutual Machine. 18 ethtool does not have the -m option available, but try mii-diag -g (interfacename). Are there a solution for that (like using /proc)? ethtool -s ethX speed 1000 duplex full autoneg on. ethtool -a eth<x> Note: does not set autoneg OFF, it only hints the driver to set a specific speed. erheghfzxprsdlmigoplsszjvftyclzepvifavbvrsfnqncyrclulxvdfkuahlacjkesobrgnqvc
Ethtool does not show speed However, network interface names can vary. If you're paranoid about Linux VM not showing right speed, you can Basically I know how to enable it ad hoc, using ethtool -s enp11s0f0 speed 2500 duplex full autoneg on . This indicates to me that the router indeed supports 1000 Mbps. 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. Changes the link speed to requested <SPEED>. I can ping the eth1 ip address from the box itself but not from anywhere else on the network, and nor can the box ping anything anywhere else. I can get it with ethtool from the terminal, but I need a way to get it programmatically. No problem, I tried it in a secondary rig running Windows and that didn't show up either via device manager. sudo ethtool -g eth2 To display duplex speed, enter: # ethtool eth1 Output: Settings for eth1: Supported ports: ethtool, mii-tool and dmesg output show very different results . Finally, type to view final configuration: On RHEL ES4u6 32bit, when I execute “ethtool eth0” it does NOT give me the speed, which I desire to know. disable_mc_loopback - when this flag is on, multicast traffic is not redirected to the device by Description: When running Linux guest VMs using VirtIO NIC drivers on AHV, some NIC details, such as Speed and Duplex information, are missing from ethtool command output: Settings for eth0: Supported ports: [ ] Supported link modes: Not reported Supported pause frame use: No Supports auto-negotiation: No Supported FEC modes: Not reported Advertised link I honestly do not know :) Last time I tried to manage the link states, I also checked the "modern # ethtool -s ethX speed SPEED_MODE duplex DUPLEX_MODE autoneg NWAY_OPTION ,where SPEED_MODE = 1000 for 1000Mbps = 100 for 100Mbps = 10 for 10Mbps DUPLEX_MODE = half for half-duplex = full for full-duplex NWAY_OPTION = off for auto sudo ethtool eth0 Settings for eth0: Supported ports: [ MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Speed: 10Mb/s. ip link show eth0 For detailed speed information, pair it with ethtool. The switchd process keeps the hardware and kernel in sync for the important port settings (speed, auto-negotiation, and link detected) when they change. I can not use tools like ethtool or mii because my system does not have a such tools and I can not install them. ethtool --show-priv-flags eth<x> Shows driver private flags and their states (ON/OFF) The private flags are: qcn_disable_32_14_4_e. If you try to run ‘ethtool’ and receive a ‘command not found’ error, it means that ‘ethtool’ is not installed on your system, or it’s not in your system’s PATH. Speed and Duplex can not be determined. Your example for 1000 speed will not work. Please add a comment to show your appreciation or feedback. 5Gb and 5Gb, to resolve this I used ethtool -s enp4s0f0 advertise 0x1800000001028. # ethtool eno1 Settings for eno1: Supported ports: [ FIBRE ] Supported link modes: 10000baseT/Full enp65s0f0: flags=6211<UP,BROADCAST,RUNNING,SLAVE,MULTICAST> mtu 1500 ether 00:0a:f7:58:53:30 txqueuelen 1000 (Ethernet) RX packets 194530523 bytes 257836045953 (240. 0 supports-statistics: yes supports-test: no supports-eeprom-access: no supports-register-dump: no supports-priv On a Red Hat VM, if I disconnect the NIC, ethtool immediately shows Link detected: no instead of Link detected: yes, and ip link show shows <NO-CARRIER,BROADCAST,MULTICAST,UP> instead of <BROADCAST,MULTICAST,UP,LOWER_UP>, but ifconfig -a shows UP BROADCAST MULTICAST MTU:1500 Metric:1, which is the same as when the NIC is connected. ETHTOOL_OPTS="speed [100|1000|10000] duplex [half A proper cable, category 5, 5e or 6. Vivek Gite is an expert IT Consultant with over 25 years of experience, specializing in Linux and open source solutions. You will need to query this information on the hypervisor host itself. Although the duplex mode cannot be accurately detected, the end of the On my Debian and CentOS VM's, SCP transfers between VM's are only going at 1GBs and ethtool does not show the Speed: Debian output: $ ethtool -i eth0 driver: virtio_net version: 1. 5gbps using the ethtool command. I need help to get running my ethernet to 1000Mb/s. ethtool -s eth0 autoneg off speed 1000 duplex full . 04: Just use a command like: ethtool eth0 to get the needed info. 153255] mt7530 mdio-bus:1f lan1: Link is Up - 1Gbps/Full - flow control rx/tx But every attempt to ask it has failed. OPTIONS ethtool with a single argument specifying the device name prints current settings of the specified device. Looking at your ethtool output for eno1, it appears that the only supported and advertised link modes are 1000 base T full, and auto ethtool vmbr0 is a good piece of advice, thank you. 0/5. After having received some advice, I'd like to dig into the config of the ethernet port by using ethtool 5. 注意：适配器在线时一旦更改速度，适配器会自动离线，您需要使用 ifup 命令将其恢复在线。 sudo ifup enp7s0 Finally, test the ethtool from command line and make sure it switches the speed without any issue before trying it from the script because it might not be a problem with your script but with the driver or card or anything. What is important is that you have all four pairs (eight wires) properly connected. In the previous step, we used ethtool to check the network speed, assuming the interface name was eth0. b)If that does not fix it, run a cable directly between the NIC and the switch. Therefore reporting the speed of the physical NIC would be inaccurate. 90. 04 Here my spec: lspci -nnk | grep 0200 -A3 21:00. I want to find out the duplex mode / speed of an etherenet interface or a bridge interface. whatever you are connecting to does NOT have auto-negotiation turned However, I don't think that's your entire problem, because eno1 has no link detected with ethtool, and ethtool should show a link for an online interface that's part of a bridge even though the UI does not. ethtool -T eth<x> Shows time stamping capabilities. PHYAD: 1. 0 server? You need to use the ethtool command to display or change Ethernet card settings. 3 server. There are a couple of ways to get the bytes read by the eth0 interface: ethtool is used for querying settings of an ethernet device and changing them. 1 GiB) RX errors 132100 dropped 168682 overruns 0 frame 132100 TX packets 237154363 bytes 214077589016 (199. 0/7. The DHCP server is deactivated, all clients have static IPs. I use ethtool to show its capabilities: ethtool enp1s0f0 Settings for enp1s0f0: Supported ports: [ FIBRE ] Supported link mo Therefore I am not able to create a BOND. With Linux, I had to manually set the speed to 2. The network is connected, but the ethtool shows the below information. From expert mode try ethtool -m (interfacename). Output includes driver, firmware, and package version. see what speeds are supported for each port using ethtool. For example, to disable autoneg and force 100Mbps full-duplex on ens18: sudo ethtool -s ens18 speed 100 duplex full autoneg off. ethtool --set-eee ethX eee off. 7. after that, but that solved nothing. changing network speed to 1000Mb/s Output on VM: [root@foo ~]# ethtool eth0 Settings for eth0: Current message level: So this is the same problem I ran into where the supported link modes do not translate to the advertised link modes. To solve this issue, you can install ‘ethtool’ using your package manager. On my Debian and CentOS VM's, SCP transfers between VM's are only going at 1GBs and ethtool does not show the Speed: $ ethtool -i eth0 driver: virtio_net version: 1. The process does not function when a device with enabled auto-negotiation connects to a device that is not using this signaling mechanism. all the three guest vnet are showing 10mbps - see the below output for one vnet [root@kvmserver /]# ethtool vnet1 Settings for vnet1: Supported ports: Supported link modes: Supports auto Cannot get current device settings: Operation not supported not setting speed not setting duplex not setting autoneg' im not able to change my duplex setting to full alos im not able to see my interface settings sudo ethtool wlo1 Settings for wlo1: Link detected: yes only link status is shown sudo ethtool -i wlo1 driver: rtl8723be version: 5. If you do not need the extra enhancements due to a low noise environment or shorter The following solutions which have been proposed on other sites do NOT work for this purpose: Using 'ifconfig' - since a network cable may be connected but the network not properly configured or not currently up. Thats all I have done. 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 where <adapter_name> is the name that shows for the adapter when using ip # 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. This will override the auto-detected defaults and force 100Mbps/Full. 0 supports-statistics: yes supports-test: no supports-eeprom-access: no supports-register-dump: no On another machine (with some embedded Realtek NIC), changes from up to down make the remote switch se a brief disconnection, but the switch sees the link then come back up. ethtool eth0 | grep -A 1 -i speed. The Ethtool does not recognize all types of cables, so for some cables it shows the EEPROM memory map This is related to these two questions, although they don't answer my question. If the link is up on one port, the driver does not allow the other port to be set to a different speed. Allows to configure the interface speed to (1000) duplex mode to (full) and auto negotiation (enabled) ethtool – show-fec eth<x> # ip link show dev eth0 |awk '/link/{print $2}' dc:a6:32:b2:8b:11 4) Check speed of a network interface. It's the on-board X550-T2 adapter that does not automatically negotiate to 2. This port named eth0 should run at 1 Gbit/sec speed (at least the doc of the cluster box tells me that) but the router tells me that it only runs at 100 Mbit/sec. Running ethtool results in stderr spew as seen in the title. For clarity : You are running latest firmware for your motherboard, have configured Without looking at the switch, the only way it seems possible is if the windows driver for your NIC reports this information. Sholander 2 August 2018 18:06 3. what does this show? ethtool wlan0. Additionally, we can also toggle the state ethtool --cable-test devname ethtool --cable-test-tdr devname [first N] [last N] [step N] [pair N] ethtool --show-tunnels devname ethtool --show-module devname ethtool --set-module devname [power-mode-policy high|auto] ethtool --get-plca-cfg devname ethtool --set-plca-cfg devname [enable on|off] [node-id N] [node-cnt N] [to-tmr N] [burst-cnt N When a device, with enabled auto-negotiation, connects to a device that is not using this signaling method, the process does not work. ethtool --show-eee ethX. I have not changed any settings on the router regarding ports. ethtool -x eth<x>. . It is used for querying settings of an ethernet Replace the cable, check connectors on switch and server for dust or any other thing which may block good connection, check that the switch has autonegotiation enabled for that port and also try forcing speed on the switch to 100Mbps. 10 you should see something like this with ethtool -m: # ethtool --show-features eth0. Is there a way to force auto-negotiation to be enabled? 0 You should be able to change the advertised speed to only link with partners that will support that I placed the first card into my machine, checked lspci and it does not show up at all. For example My computer has a 10/100/1000 network-card inside, and the speed is 1000 when the computer runs. ethtool -s eth1 advertise 0x0f would allow all 10/100 modes but not 1G. It looks like it is not receiving any packets at all. On Gaia 3. 6, they do not show network speed. Trying to enable auto-negotiation using ' ethtool –s enp74s0f0np0 autoneg on' does not work. first off mii-tool -v eth0 Output eth0: negotiated 10baseT-HD, link ok If not it Ethtool utility is used to view and change the ethernet device parameters. That’s Hi Team, Base System shows that it has 10G card connection. Display the Ethernet interface driver settings using ethtool command as shown here: # ethtool ethtool --set-priv-flags eth<x> <priv flag> <on/off> Enables/disables driver feature matching the given private flag. Shoop. See the ethtool command The switch hardware contains the active port settings. [rage@RageStation rdma]$ ethtool enp2s0d1 Settings for enp2s0d1: Supported ports: [ FIBRE ] Supported link modes: 1000baseKX/Full 10000baseKX4/Full 10000baseKR/Full 40000baseCR4/Full 40000baseSR4/Full 56000baseCR4/Full 56000baseSR4/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Supported FEC For speed details, combine it with ethtool or check the RX and TX statistics for performance trends. 5 gbps: "ethtool -s [interface name] speed 2500 duplex full" provided that 2. 5GB as expected. Attend my Gateway Performance Optimization R81. arm) CoreELEC:~ # ifconfig lo Link encap:Local Loopback Also please provide output of ethtool (interfacename) and ethtool -i (interfacename). 16, but the tool seems not to find the network interface: Recently added a Broadcom 5711 dual port 10G NIC to my Redhat 5. 5 gbps. I did not find any clues online or in the logs. 0. # ethtool eth0 Settings for Hi, In command line, how do I read the state of the port ? The switch is the MT7530 inside the MT7621 chip system message show alone: [ 630. 3. To see if it does, go to Control Panel --> Administrator Tools --> Event Viewer. ethtool handles IRQ based communication with associated devices to manage related channels settings in # ethtool --show-channels enp1s0 Channel parameters for enp1s0: Pre-set maximums: RX: 4 TX: 3 Other: 10 Combined: 63 Current hardware So the link does not appear up, despite what the hardware says. For example, to disable auto-negotiation and fix the link speed to 1gbps, do the following. 此外，您可以单独更改每个选项： sudo ethtool -s enp7s0 speed 100 sudo ethtool -s enp7s0 duplex full sudo ethtool -s enp7s0 autoneg on. In this tutorial, we learn some For Windows VM, you do need to install RedHat virtIO drivers manually to actually get, as well as display 10G speed. In this step, we'll use the ip link show command to When using ethtool -s to manually set the "Port" to MII on the main server, it looses all connectivity and does not show "Speed" or "Duplex". This type of traffic can, and frequently does, exceed the speed of the physical NIC. Running ethtool eno1 shows that advertisted link modes is all. Logically if I have already configured my Network switch with 10G speed for all the required ports, In Prism also it should reflect as 10G even if that NIC is supported 10/25G speed. ) This might or might not have something to do with preparing for Wake-on-LAN or such, but I've really no idea. And I want to change them also. 5 (S912. On a test partition with the latest Current packages, when booting directly to init 1 the network link is not initialized. The ip command is modern and replaces ifconfig. If you have older cable (e. Please post output of ip addr show and (as root) output of ethtool your-interface. List eth0 physical interface settings using sys-apps/ethtool: root # ethtool eth0. Manually set the speed and use your DAC and connect port 1 to port 2 and see if it This looks like a low level issue that originates long before high level tools like systemd-networkd and NetworkManager play a role. After that, it correctly negotiated with the cable modem to 2. The bug does not manifest when booting to My Proxmox server only transfers files at 100Mbps because, for some reason, it's set to that speed instead of 1000Mbps. (ethtool does show "no link" on the PC side, though. 0/6. If ethtool does not report the expected link speed, disable auto-negotiation by explicitly specifying the link speed. Hi vikas if you are interested in speeding up your network speed or need to check the network speed with ethtool ,You may need to change the network driver as explained here. 0 supports-statistics: yes supports-test: no supports-eeprom-access: no supports-register-dump: no ethtool --set-priv-flags eth<x> <priv flag> <on/off> Enables/disables driver feature matching the given private flag. ‘ethtool’ Command Not Found. The kernel definitely detects the card, otherwise there would be no eth1. Also lspci -k so we can see which kernel module your NIC uses. ) January 1, 2024, 2:18pm sudo ethtool -s enp7s0 speed 100 duplex full autoneg on. Digging further I found that mii-tool and ethtool do not agree on the link speed. The next command disables Auto-Negotiation, enables Half Duplex and sets up Speed to 10 Mb/s: # ethtool -s eth0 speed 10 duplex half autoneg off. What does it mean? I cannot get the 10G speed? How do i make sure i am getting the full 10G network speed? here is the ethtool eth1: ===== Here at Arzhost, we discuss the Ethtool command change speed duplex ethernet card Linux to modify the settings. The machines are RHEL6. a) Test this first with a new, known good cable between wall socket and network card. A common need is changing speed, duplex mode, and autonegotiation to resolve compatibility issues or force specific settings. It turns out that the following command will change the advertised speed for an interface to 2. Ex: If you get "Speed: Unknown!" you may be using the wrong ethXX name, worth a double check :) This only gives you the negotiated speed of your current network configuration (hence your ethernet port There's no "set speed" that a virtio-net interface obtains. ethtool -T eth<x> ethtool --show-eee devname ethtool --set-eee devname [eee on|off] [tx-lpi on|off] [tx-timer N] [advertise N] DESCRIPTION ethtool is used to query and control network device driver and hardware settings, particularly for wired Eth‐ ernet devices. It's not the modem that's the problem. 10. 3ad mode bond-mode 4 bond-lacp-rate Recently I've been suspecting that something is misconfigured as cacti graphs never appear to show more than 100mbit of traffic on the link. I’ve played with the options, but don’t see anything obvious that forcefully ethtool --show-priv-flags eth<x> Shows driver private flags and their states (ON/OFF). This enables advertising at 100BASE-T, 1000BASE-T, 2500BASE-T, 5000BASE-T and 10000BASE-T. He writes about Linux, macOS, Unix, IT, programming, infosec, and open source. -h- I used Arwen’s suggestion resulting in ethtool -s enp4s0f1 speed 10000 duplex full. Additionally, my X550’s do not autonegotiating at 2. Anyway, Am i doing something 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 Network interface eth2 does not work properly and needs to be used. which does work, but the server becomes inaccessible. However, I could not turn off the auto-negotiation (which seems recommended from @waltinator comment); if I run the command: sudo ethtool -s <name_of_card> autoneg off speed 2500 duplex full or: sudo ethtool -s <name_of_card> If Duplex is showing half, then type: sudo ethtool -s eth0 autoneg off sudo ethtool -s eth0 duplex full. I know this because it didn't do so even when I had Linux, rather than OPNsense/FreeBSD, installed. However, many of the fields in ethtool, like Supported Link Modes and Advertised Link Modes are not thx for confirming, yes i think too they can be ignored as they do not represent the mode i want to use (10Gbase-r/usxgmii)but strange that link_up is reported, but ethtool does not show the link ericwoud (Eric W. Settings for eth0: 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 I solved this by changing an ethtool setting. Check under proxmox > network in the webgui to verify the devices are showing up and gather the correct device names, it may not simply be "enp1s0f0" for you. 162 45 NAS but it's not uncommon for the LEDs to show different states/colours depending on negotiated/configured speed. 6. Show EEE state. cat3) then Gbit speeds will (actually: should) not work. The cable category is relative unimportant as Category-5e will work at gigabit. I've tried ethtool -s enp5s0 speed 1000 duplex full autoneg off. Outgoing frames destined for another VM on the same network, running on the same host will not use the physical NIC. If you have ethtool installed (in repos) you can use this command to get your link speed: $ sudo ethtool eth0 | grep -i speed Speed: 100Mb/s bandwidth (kernel) You want to see your bandwidth speed. IP address assigned only to: bond0 (do not assign any IP address to eth0 and eth2 interfaces) How to setup a bonding device on Ubuntu Linux #pre-up /usr/sbin/ethtool -s bond0 speed 1000 duplex full autoneg on post-up ifenslave bond0 eth0 eth2 pre-down ifenslave -d bond0 eth0 eth2 bond-slaves none # 802. or this for just the output you want I think. g. 0 Ethernet controller [0200]: Intel Corporation I211 Gigabit Network ethtool --show-priv-flags eth<x> Shows driver private flags and their states (ON/OFF). To check the speed of a particular network interface port, use the following command: # sudo ethtool eth0 |grep "Speed:" Speed: 10000Mb/s. 5gbps. Display the network usage statistics for an interface: 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. ethtool -x eth<x> On my Debian and CentOS VM's, SCP transfers between VM's are only going at 1GBs and ethtool does not show the Speed: Debian output: $ ethtool -i eth0 driver: virtio_net version: 1. 0/8. Show Ring parameter. The router has not many options anyways. Nothing: but it does not show wlan0 speed: CoreELEC (official): 8. Note: <autoneg off> does not set autoneg OFF, it only hints the driver to set a specific speed. The next command disables Auto-Negotiation, enables Full Duplex and sets up Speed to 100 Mb/s: # ethtool -s eth0 speed 100 duplex full autoneg off 4. root@OpenWrt:/# swconfig dev switch0 port 0 show $ sudo ethtool --pause s2-eth3 autoneg off rx off tx off Cannot get device pause settings: Operation not supported $ sudo ethtool --change s1-eth1 speed 1 Cannot set new settings: Operation not supported not setting speed Executing ethtool with an active link gives the following: #ethtool enp74s0f0np0. To check the supported speeds, run ethtool eth<x>. Under kernel 2. ethX is the name of the ethernet device on which ethtool should operate. You can change network card speed, auto-negotiation, wake on LAN setting, duplex mode using this tool in Linux. You then want to look at the System logs (in Windows7 this is under the Windows Logs tree). 0 firmware-version: expansion-rom-version: bus-info: 0000:00:12. Once you found the System logs, click on Source at the top to use as the I have a optical X710 NIC which runs in 10,000Mb/s speed (SFP+). My question is, How come only one NIC is showing 10G speed & rest of them with 25G. disable_mc_loopback - when this flag is on, multicast traffic is not redirected to the device by Dear all SPICEHEADS Why do KVM guests show vnet interface link speed as 10Mbps Scenario is - One host OS is linux and 3 guest (windows os) on this KVM qemu. Ping a host - since the product will be within a LAN using an unknown network configuration and unknown hosts. advertise N Sets the speed and duplex advertised by autonegotiation. Auto-negotiation: on. Transceiver: external. The supported speeds reported by ethtool do not show gigabit speeds, only 10/100 Half/Full duplex. I've also tried running ifup enp5s0. If both devices do not support 1000Base then they will lower themselves to the maximum supported. Duplex: Full. The end of the connection with an active auto-negotiation is still able to detect the speed of the other end, but cannot correctly detect the duplex mode. ethtool -t eth<x> Performs a self-diagnostics test. 4. Port: MII. I'm using udev for this. ethtool -s ethX speed 25000 autoneg off. I have checked in both CentOS/RHEL 5. Does anyone know how I can get the link speed attribute with udev or another ethtool -s eth<x> speed <SPEED> autoneg off. 1. The ethtool utility manages the link speed and related settings of a network interface card. ethtool -i ethX. It's a software implementation of a network interface, it obtains the fastest possible speed it can, and that speed will vary The ethtool command is used to display/change Ethernet adapter settings. Ethtool was updated and picked up a bunch of new command line switches in Gaia kernel 3. $ sudo ethtool --show-pause enp0s3 Pause parameters for enp0s3: Autonegotiate: on RX: on TX: off $ sudo ethtool -s enp0s3 speed 50 duplex half Cannot advertise speed 50 duplex half. By default, the Ethtool attempts to parse the output of the EEPROM and show it in a human-readable way. This works, but only for the current session, if I reboot the setting is Verify interface with ip link show. ethtool with just the device name as an argument will show you the pre-up /usr/sbin/ethtool -s eno1 speed 1000 duplex full autoneg off However after a reboot it doesn't seem to have effect. speed N Set speed in Mb/s. 5 gbps is a supported speed. Does anyone have any solution for this. The output of ethtool swpXX shows the port settings stored in the kernel. When you execute ethtool command with a device name, it displays the following information about the ethernet device. If I manually run ethtool -s eno1 speed 1000 duplex full autoneg off and look at ethtool eno1 it only reports advertised link mode 1000baseT/Full. Force the speed to 25G. Changing the speed and duplex settings of an Ethernet card in Linux can help optimize network performance, resolve connectivity issues, and define how effectively your servers communicate. While it doesn’t directly show speed, it provides insights into link states. The ethtool command How do I determine my Ethernet connection speed under Debian Linux 4. Supports Wake-on: g. How much of the total speed you're using over a given amount of time. 238798] mt7530 mdio-bus:1f lan1: Link is Down [ 656. 20 course CET (Europe) Timezone Course Scheduled for July 1-2 # ethtool -s eth0 autoneg on. ETHTOOL_OPTS=”speed 1000 duplex full sudo ethtool -s <name_of_card> speed 2500 The command above raises the speed to 2. My system is Ubuntu 22. If the switch is old it may have a mix of ports at different speeds. 3 GiB) TX errors 0 dropped 0 overruns 0 carrier I need the mac address, mtu, link speed and a few others. This has been tested on Fedora 40 and Ubuntu 24. But ethtool seems capable of telling the driver what speed/duplex modes to advertise. 4. I'm fairly confident ip addr was reporting 1000 for some reason (it's fixed now so I can't confirm) I've just built a spare machine and it's connecting at 10Mbit (yes, 10, not 100 or 1000) on 2 different ethernet cables too, I'll have to have a play and see what on earth is going on, but this has helped diagnose why a backup sudo ethtool -s eth0 speed 1000 duplex full autoneg off then in ethtool speed is Unknown and it doesn't work; if I set it via pre-up it wont work either Please help!! Thanks! (Your NIC) AND your switch or router support 1000Base. You need to follow the instructions in my first post to fix it. Network interface port speed can only be verified in Linux using the ‘ethtool’ command. The 'Supported Mode' says : 1000T/Full. Using ip. ethtool not showing all the properties 2. I've already figured out how to get the mac address and mtu, but not how to get the link speed. lets talk. Seems like there would be some other way to find in a Virutual Machine. 18 ethtool does not have the -m option available, but try mii-diag -g (interfacename). Are there a solution for that (like using /proc)? ethtool -s ethX speed 1000 duplex full autoneg on. ethtool -a eth<x> Note: does not set autoneg OFF, it only hints the driver to set a specific speed. erhegh fzxp rsdlm igo plsszj vfty clz epvifav bvr sfnqncy rclulx vdfkua hlacjk esobr gnqvc