Mii-Tool is a Linux command-line utility that allows you to configure network device negotiation methods. It is used to monitor and set the status of the Media Independent Interface (MII) of a network interface controller (NIC). Mii-Tool can be used to check the link status, duplex mode, and speed of the network interface.
Overview
Mii-Tool is a simple command-line tool that can be used to configure network interface controllers. It is typically used to check the link status of a network interface, and to set the speed and duplex mode. The command is run from the terminal, and requires root or superuser privileges.
Syntax
The basic syntax for using Mii-Tool is as follows:
mii-tool [options] [device]
Examples
To check the link status of a network interface, type the following command:
mii-tool eth0
This command will display the link status of eth0, along with other information such as the speed and duplex mode.
To set the speed and duplex mode of a network interface, type the following command:
mii-tool -F 100baseTx-FD eth0
This command will set the speed of eth0 to 100 Mbps and the duplex mode to full-duplex.
Use Cases
Mii-Tool is useful in a variety of situations, including:
- Troubleshooting network connectivity issues
- Configuring network interface controllers
- Checking the link status, speed, and duplex mode of a network interface
Options
The following table lists the available options for Mii-Tool:
| Option | Description |
|---|---|
| -A | Advertise all supported modes |
| -F | Force the specified mode |
| -r | Restart auto-negotiation |
| -R | Report the current settings |
| -w | Wait for link beat |
Troubleshooting Tips
Some common issues that may arise when using Mii-Tool include:
- Permission denied errors: Make sure you are running Mii-Tool with root or superuser privileges.
- Incorrect device name: Double-check that you are using the correct device name for the network interface you want to configure.
- Unsupported mode: If you receive an error indicating that the mode you are trying to set is not supported, try setting a different mode.
Notes
- Mii-Tool is only available on Linux systems.
- Mii-Tool may not work with all network interface controllers.