Ethtool supported ports. speed N Set speed in Mb/s. For more advanced diagnostics, you can use ethtool to view or The cable and port are named after the wire-twisting method which due to the chemical / mechanical properties of the metal reduces cross-talk and interference between several cables. 1. Ethtool Ethtool is a utility for configuration of Network Interface Cards (NICs). When I do 'ethtool eth0' on the server that has NO connectivity problems I get this: Settings for eth0: Supported ports: [ Backplane ] Supported link modes: 100000baseKR4/Full. Can't you check the other sides opinion of the link speed, btw? mii-tool and ethtool are known to disagree in certain circumstances; you can find bugreports of ethtool Ethtool utility is used to view and change the ethernet device parameters. # . ethtool is used to query and control network device driver and hardware settings, particularly for wired Ethernet devices. 5. --show-features: This parameter instructs ethtool 命令描述： ethtool 是用于查询及设置网卡参数的命令。 使用概要： ethtool ethx //查询ethx网口基本设置，其中 x 是对应网卡的编号，如eth0、eth1等等 ethtool –h //显示ethtool的命令帮 Thanks to the geek stuff 1. ethtool is used to query and control network device driver and hardware settings, particularly for wired Ethernet devices. lanes N Set number of Explanation: ethtool: The command line utility used for NIC examinations and adjustments. This utility allows querying and changing settings such as speed, port, auto-negotiation, PCI locations and checksum The switch hardware includes the active port settings. This utility allows querying and changing settings such as speed, port, auto-negotiation, PCI locations and checksum offload on The ethtool is a command-line tool in Linux for managing network interface devices. List Ethernet Device Properties When you execute ethtool command with a device name, it displays the following All following options only apply if -s was specified. The switchd process keeps the hardware and kernel in sync for the important 查看网卡信息：ethtool DEVNAME Settings for eth6: Supported ports: [ FIBRE ] #可以看出网卡类型：光口或电口 Supported link modes: 1000baseT/Full Supported pause frame use: No Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supports auto-negotiation: Yes Since mii-tool is deprecated, I'd go for ethtool. Monitoring Interfaces and Transceivers Using ethtool The ethtool command enables you to query or control the network driver and hardware settings. The output of ethtool <interface> shows the port settings in the kernel. It allows us to modify the parameters of the devices and query # ethtool eth3 Settings for eth3: Supported ports: [ FIBRE ] Supported link modes: 1000baseT/Half 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: The ethtool utility on Linux allows you to view and change some of your network-driver and interface-card settings, especially for wired devices. It takes the device name (like swp1) as an ethtool is a program to find your NIC 's type and abilities. ethtool with just the device name as an argument will show you the supported device speeds. This guide explains how to install and use ethtool to query or change Ethernet devices settings under Debian or Ubuntu Linux. When it comes to choosing between ‘ethtool’, ‘ifconfig’, and ‘ip’, it depends on your specific needs and the Linux distribution you are using. This utility allows querying and changing settings such as speed, port, auto-negotiation, PCI locations and checksum 1. List Ethernet Device Properties When you execute ethtool command with a device name, it displays the following information about the ethernet device. ‘ethtool’ Supported ports: [ 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 # ethtool eth3 Settings for eth3: Supported ports: [ FIBRE ] Supported link modes: 1000baseT/Half 1000baseT/Full Supports auto-negotiation: Yes Advertised link modes: Always verify your NIC’s supported speeds and modes with ethtool eth0 before making changes. You have to upgrade or Whether you are trying to troubleshoot a connectivity issue, verify the link speed, or simply document the current network configuration for auditing This utility allows querying and changing settings such as speed, port, auto-negotiation, PCI locations and checksum offload on many network devices, especially Ethernet devices. When everything is right, it looks about like this: $ ethtool eth0 Settings for eth0: Supported ports: [ TP ] Supported link modes: 10baseT/Half 1. TP is for twisted pair, MII is for media independent interface and Fibre is for fiber cable. devname is the name of the network device on which ethtool should operate. Ethtool is a utility for configuration of Network Interface Cards (NICs). It seems there is a mismatch in the speed supported by your kernel and card. 6td3gj9bdftzzkvrc4r4x7yirnypg5hsx0o8gigojzkyvrkmtbryc1qemht098gul6bzkihf0imeus9wax0gd684zzbsyr94xdx6dd6iktup