Ethtool command to show all interfaces example I, IT News, DataOps, Open Source and more delivered right to you. This user guide provides in-depth documentation on the Cumulus Linux installation process, system configuration and management, network solutions, and monitoring and troubleshooting recommendations. 1. TechnologyAdvice does Monitoring Interfaces and Transceivers Using ethtool - ethtool Counter Definitions. vmkping is one of them. To see hardware capabilities and measurement information on the module in a particular port, use the ethtool -m command. 224” will set the network mask to a given interface eth0. Not all options are currently supported on Hello everyone! I've had to make several configuration changes using ethtool in order to increase my network performance in Proxmox 7. IP Command : IP command is kind of a replacement of ifconfig command. com. you can use the “ifconfig” or “ip” command followed by the interface name. Share. So let‘s get started! Deep Diving into ethtool Parameters Show the Network Manager status of all network interfaces: nmcli con show: List all connections: nmcli con show name: List the current settings for the connection name: 802-3-ethernet (ethernet), 802-1x, dcb, sriov, ethtool, match, ipv4, ipv6, tc, Lastly in nmcli command examples, you can delete all type of available connection using "nmcli con del <ifname>" One of the most useful and popular commands used on Cisco devices is the “show interface” command. If the interface does not show the expected speed, check the following: One or Below ethtool command can be used for checking network interface speed/bandwidth in Gbits/sec on Linux hosts. Using the “ifconfig” command with the “netmask” argument and interface name as (eth0) allows you to define a netmask to a given interface. But first, the command structure: where option is none or more options, and devname is your Network Interface Card (NIC). root@cyberithub:~# nmcli g log level DEBUG domains CORE,ETHER,IP Example 18: How to Change an Interface to an unmanaged Interface. Currently statistics are supported in the Monitoring Interfaces and Transceivers Using ethtool. Subscribe "The best Linux newsletter on the web" Save and refresh the network interface. 0. On Gaia 3. In -i --driver Queries the specified network device for associated driver information. sudo ethtool enp7s0 When you execute ethtool command with a device name, it displays the following information about the ethernet device. # ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full As you can see, many columns and details are not very easy to read when you cat the file so I would suggest to use ifconfig command which reads that file and formats output nicely. SPEED dev show <interface> For example: $ nmcli -f CAPABILITIES. Improve this answer. However, some fields in ethtool, such as Supported Link Modes and Advertised Link Modes, do not update based on Display Network Interface card version #ip link show. ethtool --show-eee ethX. This gives output like: Cumulus Linux 5. [root@tecmint ~]# ifconfig eth0 netmask 255. Like this you can check if the remote site (remote host) reply on this VMkernel. However, the function in question is defined as static __inline__, as already noted, so there is no symbol to link against. Display and modify Network Interface Controller (NIC) parameters. -s {interface} {setting} {value} Change some of a NIC’s settings, such as its speed and duplex mode. From the output, verify that the listed speed for the bonded interface is double the speed of the child interface. Command. /iflist The above will use the enumeration method I described. Using ip command. Commands you run in this shell apply to all Security Appliances in the Security Then execute the ethtool -m <interface> command to obtain the SFP module information corresponding to the interface. ; eth0 – My first Ethernet network interface on Linux. The ethtool utility on Linux allows you to view and change some of your network-driver and interface-card settings, especially for wired devices. You can also test the following line: /sbin/ethtool -K eth0 tso off gso off gro off lro off. . that will show you the unconfigured/down network interfaces as well as configured and active ones, as read from /proc If a network interface card (NIC) is causing problems on your Ubuntu Server, see how to use the ethtool command to troubleshoot the issue. If the module supports Digital Optical Monitoring (the Optical diagnostics support field is Yes in the output below), the optical power levels and thresholds also show below the standard hardware Prerequisites. Downloads file. g. 103 3 3 bronze nmcli -f CAPABILITIES. Everything Linux, A. Modifications made with ethtool command are by default disappeared after a reboot. 2-9 bus-info: 0000:02:00. 9 User Guide. I have checked in 2 computers running wifi, the 2nd listed is the cable ethernet. NVIDIA® Cumulus Linux is the first full-featured Debian bookworm-based, Linux operating system for the networking industry. This command allows us to use the IP stack of VMkernel interface to send a ping command to another VMkernel interface. Just include linux/ethtool. For example, if you edited ifcfg-eth0 with the previous example, then ifup runs the command: ethtool -s eth0 ${ETHTOOL_OPTS} The command gives the following output: ethtool -s eth0 autoneg For a full list of commands type ethtool -h or see the man page, ethtool(8), for a more comprehensive list and explanation. 0 supports-statistics: yes supports-test: no + The following command will show “which tap interface has been created for this UVM” From the above example, we can confirm that “eth2” interface is connected to “swp35” interface and “eth3” interface is connected to For example, let’s create a TUN interface named tun0: $ sudo tunctl -t tun0 Set 'tun0' persistent and owned by uid 0. How to Assign a Netmask to Network Interface. ip Command for Network Interface Management. 2 type vlan id 2. Using the ethtool command line tool returns the expected values, and my NIC driver supports the newer ETHTOOL_GLINKSETTINGS API. Show EEE state. Get hostname using uname -n; Get its IP using nslookup `uname -n` Search for the IP in ifconfig output to know on which interface it's configured; Using ethtool <interface captured in above command> | grep -i speed /sbin/ethtool -K eth0 tso off. Viewing the current configuration. An undefined reference means you're not linking with a required library. [root@localhost I noticed we that the ethtool command is not working on the interfaces except DMZ, eth0 and eth2 but i also dont know on what interfaces do eth0 and eth2 is used or integrated. driver: igb version: 2. For example, “ifconfig eth0 netmask 255. 0 eth0 network RTL8101E/RTL8102E How to Check Network Interface Information on Linux with ethtool. # ethtool -i eth0. ethtool <interface> | grep Speed For e. The "Network Interface Card (NIC)" or "Ethernet device" driver When you execute ethtool command with a device name, it displays the following information about the ethernet device. This command will show you a list of all network interfaces on your system, along with their IP addresses, MAC addresses, and other relevant details. Ethtool is a command-line tool used in Linux-based operating systems to query and control network interface settings. Get the Free Newsletter! for example, the order in which they appear. Red Hat Enterprise Linux 4; Monitoring Interfaces and Transceivers Using ethtool. The ip command is used to show and manipulate routing, devices, policy routing, and tunnels in Linux. Global View of All Interfaces (show interfaces) Use the "show interfaces" command in Gaia gClish The name of the global command line shell in Check Point Gaia operating system for Security Appliances connected to Check Point Quantum Maestro Orchestrators. The ethtool configuration tool installed. A simple script to apply the same settings to all interfaces would be something like: #!/bin/bash if [ -n "$1" ]; then /sbin/ethtool -G $1 rx 4096 tx 4096 A simple script to apply the same settings to all interfaces would be something like #!/bin/bash if [ -n "$1" ]; then /sbin/ethtool -G $1 rx 4096 tx 4096 /sbin/ethtool -K $1 tso on gso on fi Keep in mind this will attempt to apply settings to ALL interfaces, even the loopback. sudo ethtool --driver enp0s3 In the above command, we run the ethtool to check the information about the driver associated with the enp0s3 network interface. The Linux ethtool command allows you to view and modify network device settings, including the speed, duplex mode, auto-negotiation, and driver information. . ; How to Use ethtool Command to Set Speed & Duplex of Ethernet Card. Protocol-related statistics can be requested in get commands by setting the ETHTOOL_FLAG_STATS flag in ETHTOOL_A_HEADER_FLAGS. Enable EEE, but disable LPI. It provides a wide range of options to retrieve information about the network The ethtool command retrieves the status of the Ethernet interface. [Expert@Gateway-ID-MAYAPA]# ethtool -g WAN Ring parameters for WAN: Cannot get device ring settings: Operation not supported [Expert@Gateway-ID-MAYAPA]# ethtool -g Add an Interface to Existing Bridge; Add Multiple Interfaces to Existing Bridge; Tracking MAC address of a Bridge; On a related note: 9 Linux ethtool Examples to Manipulate Ethernet Card. -f {interface} {image} Write (“flash”) a firmware image to the NIC. The first two examples are information queries and show the use of the different formats of the command. 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] [burst-tmr N] ethtool --get-plca In the latest version, you are required to enter commands interactively. However the information is a bit messy and if you know what type of interfaces you are interrested in another possibility is to use ip link show type TYPE which will list all interfaces of that type. Example: modprobe 8021q; ip link add link ens3 name ens3. ethtool. For example, to check the status of Method 2: How to find an ethernet MAC Address in Linux Using ifconfig command. ; Access to the terminal. To list only specific interfaces, run it naming the interfaces:. Where eth0 is your interface. The output of ethtool <interface> shows the port settings in the kernel. Telegram. Example (Display all interfaces): ifconfig Diagnose Network Interfaces. Here is a video that shows how it works (at 2:50 shows blink): We can use the ip command or netstat command or ethtool command to show dropped packets statistics per network interface on Linux. Following are the examples to illustrate the usage of ethtool command: Display the Ethernet interface's current settings using ethtool command as shown here: $ ethtool enp0s3 Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company This command checks for "state UP" in the 2nd interface of the "ip a" command. root@cyberithub:~# nmcli device status DEVICE TYPE STATE CONNECTION enp0s3 A basic ETHTOOL commands line cheat sheet for with simple descriptions of each command. To list all network interfaces in Ubuntu, use: ip link show. N etworkers Online. Here we are checking MAC Address of interface enp0s3 using ifconfig enp0s3 command. , eth0, eth1): # ethtool -m <interface> For Example: Monitor Switch Port SFP and QSFP Hardware Information. See man ethtool(8) for details. What is the preferred method to make ethtool changes permanent so they will persist across reboots as well as updates? List of all important CLI commands for "ethtool" and information about the tool, including 6 commands for Linux, MacOs and Windows. org/ethtool. For example, you can type the start at the dropwatch> prompt to tell the Linux kernel to start reporting dropped packets and stop to tell the Linux kernel to discontinue reporting dropped packets. TYPE := { vlan | veth | vcan | vxcan | dummy | ifb | macvlan | macvtap | bridge | bond | You cannot use the network RHEL system role to update only specific values in an existing connection profile. As you see from the show command, we don’t see the “stage” Now you can use the ethtool command to identify the physical network interface corresponding to the network interface name. Run the following command to verify the LACP bond is functioning on both the HyperScale node as well as the switch: ethtool <bond interface name> For example: ethtool bond1. ethtool provides detailed information about the interface: $ ethtool -i enp2s0 driver: r8169 version: 2. The ethtool help is quite comprehensive and allows you to learn Where, lo – Loopback interface. zip from example. ip link add name1 type veth name2 But I haven't found an command or Network Troubleshooting commands. The 'ethtool' command is a powerful utility for displaying and modifying Network Interface Controller (NIC) parameters on a Linux system. Reports the network status, manages and configures the network connections and controls the NetworkManager tool. This option displays driver version, I have a question related to the veth pair that is used in Linux system. Let’s start by using this command to display all the network interfaces on our system: $ ip addr show 1: eth0: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd Here’s an example of how you can use ‘ethtool’ to view the settings of a network interface called ‘eth0’: ethtool eth0 # Output: # Settings for eth0: # Supported ports: [ TP MII ] # Supported link modes: 10baseT/Half 10baseT/Full # 100baseT/Half 100baseT/Full # 1000baseT/Half 1000baseT/Full # Supported pause frame use: No # Supports auto Just use a command like: ethtool eth0 to get the needed info. P. The ethtool command provides information about and allows you to configure network interface parameters. Installing the Linux Driver on Ethernet Network For example, to set the speed at 1000Mb/s, the duplex mode to ‘full’ and the auto-negotiation to ‘on’ the command would be: # ethtool –s enp0s3 speed 1000 duplex full autoneg on To Permanently Set Ethtool Command Settings. /iflist eth0 lo ethtool eth1 this command will list all the details about eth1 including speed, duplex, port you can use popen() to get the output and map it. Full duplex : Enables sendi ethtool Command Examples. 1-10. For example, if you edited ifcfg-eth0 with the previous example, then ifup runs the command: ethtool -s eth0 ${ETHTOOL_OPTS} The command gives the following output: ethtool -s eth0 autoneg Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Monitor Switch Port Hardware Information. Whether or Use the ethtool command to list the details of the Ethernet device ens33 right away: The " Settings for ens33 " Ethernet device is highlighted in the output. More information: https {eth0}} Display all supported features for an interface: ethtool --show-features {{eth0}} Display the network usage statistics for an interface: ethtool --statistics {{eth0}} Blink Monitoring Interfaces and Transceivers Using ethtool. We will also use examples to help you better understand the content. When you execute the ethtool command with a device name, it displays ethernet card properties such as speed, wake on, duplex, and the link detection status. This above ethtool output displays ethernet card properties such as speed, wake on, duplex and the link detection status. It allows users to gather information about their network interfaces and make adjustments to optimize With the ETHTOOL_OPTS variable defined in the ifcfg file for a network interface, the ifup command runs the ethtool utility and passes it the options that are defined by the variable. To display more information about a specific interface, use the following command: #ethtool <interface_name> Display driver settings. ifnames=0 kernel boot option to enable old interface names). The ring parameters are also called interface buffers. Each parameter will be listed individually, providing information about Would I just edit the file and insert the same command I used to change the setting before the exit 0 line? For example: ethtool -G em1 rx 2047 exit 0 I'm relatively new to Linux and not all that script savvy so I'm wondering if I can edit the rc. Print. ethtool -s ethX speed 25000 autoneg off. SPEED: 100 Mb/s Share. Given below is an example: The ethtool is a utility for displaying and configuring Ethernet card driver and hardware settings. can use ethtool with the -a or -s option to retrieve information about the To use this tool in Linux write ethtool followed by the interface name to show and modify the settings of your network interface card − Here is an example case −. Delete Existing Ethernet Bridge using delbr. 10. Not all options are currently supported on Here is an example program: To list all interfaces, run it without parameters:. Replace with the name of your network interface (e. Facebook. It takes the device name (like swp1) as an argument. Linkedin. Common; Linux; Osx; Windows Home; Linux Commands; ethtool; ethtool Command Examples. To see hardware capabilities and measurement information on the SFP or QSFP module in a particular port, use the ethtool -m command. If you check the list of interfaces using nmcli device status command then the state of the interface will show as given below. Once you have the Ethernet interface name, you can quickly check its details using the ethtool command. ethtool --set-eee ethX eee off. This command is used to perform different network administration tasks. Description. A user account with root privileges. Again, WiFi device might be renamed as wlp82s0 depending upon your driver. Linux is an operating system that is similar to Unix. In the output result, you can find the “Serial number” field, which is the serial number of the SFP Do you know a single line command to capture NIC speed of the primary interface of the server. Example To check the details of an SFP module in Red Hat Enterprise Linux (RHEL), you can use the ethtool command. For example: ethtool --show-link eth0 ethtool --driver eth0. Email. Good when configuring iSCSI or vMotion VMkernel interfaces Let's describe our scenario. ; ppp0 – Point to Point Protocol network interface which Under the hood look at ethtool source code ; Whether you aim to accelerate database access, reduce latency for real-time systems, or tune networking for heavy computational workloads, unleashing the true throughput potential of NICs with ethtool unlocks new realms of possibility. SPEED dev show enp0s31f6 CAPABILITIES. Let us see how to use both commands list dropped packets per interface. Ethtool also works with vmware ESXi with -p parameter: Example: ethtool -p vmnic0 15 vmnic0 will blink for 15 seconds. where. 0 wlan0 network RTL8187SE Wireless LAN Controller pci@0000:14:00. -d --register-dump Retrieves and prints a register dump for the specified network device. exit 0. If you want to check the MAC Address of a specific network interface using ifconfig command then you need to use network interface name with ifconfig command as shown below. The role ensures that a connection profile exactly matches the settings in a playbook. For example eth0 You can use the ethtool command to read and change information about your network interfaces. For example, enable Wake-on-LAN (WOL) using the magic packet method: sudo ethtool -s ens18 wol g. Under kernel 2. Home; All Posts; Pulse; Toolbox; Cheatsheets; Contact Us; Pulse:Stay # To show statistics for the selected interface: ethtool -S # To show interface permanent address: ethotool -P # To set interface speed: ethtool -s [ speed %d ] # To set interface autonegotiation: Ethtool was updated and picked up a bunch of new command line switches in Gaia kernel 3. With "lspci" you can display the pci slot and more: # lspci -v User space should use ETHTOOL_GDRVINFO to retrieve the number of statistics (. -i {interface} Show driver information for a NIC. Ex: $ ethtool eth0 | grep Speed. I'm trying to use the Ethtool ioctl API to retrieve linkspeed data from my NICs, but I just just get zeroes back in the ethtool_link_settings instance. ip COMMAND CHEAT SHEET for Red Hat Enterprise Linux IP QUERIES SUBCOMMAND DESCRIPTIONS AND TASKS information only for device em1 link Manage and display the state of all network interfaces ip link Show information for all interfaces ip link show dev em1 Display information only for device em1 ip -s link Display interface statistics route Display and Lists all network interfaces and their settings. Changes made using ethtool are runtime changes and not persistence changes. 4 03/27/12 expansion-rom-version: bus-info: 0000:02:00. To list all interfaces use /sbin/ifconfig -a. Not all options This can be done using the "ethtool" command, which is a powerful tool used to view and modify network interface settings. 7. Environment. Using brctl delbr, we can delete an existing ethernet bridge. 0-k2 firmware-version: 3. These include their speed, whether the interface Refer to man ethtool for details on additional options. More information: https://manned. 18 ethtool does not have the -m option available, but try mii-diag -g (interfacename). This change is supported only for the BPEth0 and BPEth1 interfaces. You can also use the ethtool command to retrieve specific information about the interface, such as the link state, driver information, and more. ethtool --set-eee ethX eee on tx-lpi off. Modifies and queries settings of network interfaces, such as speed and other parameters. Similarly, typing the exit command exits the program and returns control to the CLI: Before we discuss ethtool commands and examples, Use the -show-features flag with the ethtool command to obtain the desired Ethernet device features: ethtool --show-features ens33 The aforementioned command lists all the functions that the ens33 ethernet device supports. As you have found out already, you can do lshw -class network -businfo. if you want to bond5 network interface speed, your command looks as follows: When looking for a tool to obtain data about default options and packet statistics on a networking interface, ethtool can be used with its various functions to create a complete profile of an interface. When it's running, you should see the LED indicator light blinking (usually orange) on the physical network interface corresponding to the network The output of the ethtool --show-pause command will display the pause parameters for the specified network interface. S. ReddIt. To check the current speed and duplex settings of an Ethernet card, simply run the "ethtool" command followed by the name of the interface. Show ethtool help. Disable EEE. Example for eth0 network interface name: ethtool--identify eth0 This command will run untill you stop it. local file or if I need to make the change in script and have that called for at boot. For instance, here's my output: $ sudo lshw -c network -businfo Bus info Device Class Description ===== pci@0000:0e:00. The ip command is the most popular tool in Linux to display all network interface configuration information. -t {interface} Execute a self-test on the NIC. Zhe. nmcli. 255. For network interfaces, some useful ip commands are: List All Interfaces. For example, if we want to check the current configuration of "eth0", we would run − use the "ethtool" to check the interface driver and interface speed/duplex. For example for the interface eth0. 6. Let’s go. 1. That means you've included the wrong header or perhaps declared the function yourself. This command displays the settings of the network interface named ‘eth0’, including supported ports, link modes, speed, ethtool works against specific network interface names like ens160 or eth0. Command Examples. ip link show (you have to grep for your interface and "state UP" or "state DOWN") send one ping to some known online host (could also be given as parameter) in your network ( ping -c 1 -w 1 ip_address &> /dev/null , -c specifies the number of packets to send and -w is the timeout in seconds) The switch hardware includes the active port settings. Digg. To use it effectively, you first need to determine what names match your physical ports, VLANs, In this post, you will learn how to use ethtool Command to correctly manipulate your Ethernet card on Linux. Not all options are currently supported on lshw and lspci are both capable of showing that information. From expert mode try ethtool -m (interfacename). The output displays properties like speed, duplex, status and wake on of the etho interface. Or disable TCP segmentation offload: sudo ethtool -K ens18 tso off. Use the following command to check the SFP module details for a specific network interface. How to Use ethtool Command with examples. In the next step, we will learn how to modify the network interface settings using the ethtool command. For example, ethtool -g ethX reads the size of the ring buffer on the NIC, and ethtool -G ethx rx A tx B changes it. The key point is ethtool gives you low-level control to tweak adapter settings for performance and compatibility. Speed: 1000Mb/s Share. If the SFP or QSFP supports Digital Optical Monitoring (the Optical diagnostics support field is Yes in the output below), the optical power levels and thresholds also show below the . If a connection profile with the same name already exists, the role applies the settings from the playbook and resets all other settings in the profile to their defaults. On modern Linux distros eth0 might be renamed as enp0s31f6 depending upon your driver. Identifier : 0x03 (SFP) Extended identifier : Using ethtool command The ethtool is a utility for displaying and configuring Ethernet card driver and hardware settings. n_stats). Case you want to check a different interface, just change the "2" in the command below to be the correct index position. Display the current settings for an interface: You can also use the ethtool command to retrieve specific information about the interface, such as the link state, driver information, and more. 10 you should see something like this with ethtool -m:. Follow edited Oct 31 at 7:26. That’s all about the use of the ethtool 1. I know that to construct veth pair, you can simply by using . To display the IP address and other Linux Ethtool Commands. I want to know which veth pairs are running in the current host, which I mean querying the pairs by using one Linux command or finding the related configuration in some files. Twitter. With the ethtool you can display the version and type of the driver. It will be different of course (or you may use the net. It will disable all offloading. ethtool -g {BPEth0 | BPEth1} Example: [Expert@MyChassis-ch0x-0x:0]# ethtool -g BPEth0. When ethtool is installed you can simply use: $ ethtool -i enp2s0 | grep driver | awk '{print $2}' r8169 where enp2s0 is the device name. It can be very useful at troubleshooting connectivity issues and physical port issues, check the status of physical ports, watch how much traffic is passing through the interface, which IP address is assigned to the interface (for Layer3 interfaces) etc. When the device name is the only argument to ethtool, it prints the current settings of the network device. Following are the three types of duplexes available. ; wlan0 – Wireless network interface in Linux. ethtool-netlink¶ Ethtool netlink is a replacement for the older IOCTL interface. For example, you can change the following and much With the ETHTOOL_OPTS variable defined in the ifcfg file for a network interface, the ifup command runs the ethtool utility and passes it the options that are defined by the variable. 224 8. h. How to (µ/ý X´* ªwåCF GhÛ nÈ ; € 0ìï²ÿßIfÑJ/ŽXë *:g÷gE׈ð˜@¨ÇQ cÅŽ!ÓX Å(> 5á‰Ä_5k €5à4 % , 'çbFÆ’Ê[|«] —¥–J¬=Šøqk ´Æ As said by @ben ip -d l gives details about the interfaces among which the interface type. For example: ethtool --show-link eth0 ethtool - In this example, we use the ethtool command followed by the name of the network interface, eth0. Alternatively, you can use the ip command to show network interfaces in Linux. Use the ethtool command in the Expert mode to change in the size of Rx (receive) and Tx (transmit) ring parameters. ethtool [network interface] 3. 3. 3LK-NAPI firmware-version: rtl8168e-3_0. The ethtool command enables you to query or control the network driver and hardware settings. Complete Story. For example, for eth0. The switchd process keeps the hardware and kernel in sync for the important port settings (speed, auto-negotiation, and link detected). For example, to check the type of a TUN or TAP interface, we can use the ethtool command with the Here’s an example of how you can use ‘ethtool’ to view the settings of a network interface called ‘eth0’: ethtool eth0 # Output: # Settings for eth0: # Supported ports: [ TP MII ] # Supported link modes: 10baseT/Half 10baseT/Full # 100baseT/Half 100baseT/Full # 1000baseT/Half 1000baseT/Full # Supported pause frame use: No # Supports auto The syntax of the ethtool command is: # ethtool [options] {device name} Used To -S {interface} Show statistics for a NIC. tzdn mrqiq xnn dzwfdws pfpa rmdjl wjef onemux fbaozl hezusn