1 command-miI-Tool & ethtool (configure Nic Mode)

MII-tool usage:

 

[Root @ localhost ~] # MiI-tool-help
Usage: MII-tool [-vvrrwl] [-a media,... |-F media] [interface...]
-V,-version display version information
-V,-verbose more verbose output Note: displays network interface information;
-R,-Reset reset MII to poweron state Note: reset MII to Enabled state;
-R,-Restart restart autonegotiation Note: restart the automatic negotiation mode;
-W,-watch monitor for link status changes Note: view the status changes of network interface connections;
-L,-log with-W, write events to syslog Note: Write events to system logs;
-A,-advertise = media ,... Advertise only specified Media Note: indicates a specific network interface;
-F,-force = media force specified Media Technology Note: Change the network interface negotiation method;
Media: 100baset4, 100basetx-fd, 100basetx-hd, 10baset-fd, 10baset-hd,
(To advertise both HD and Fd) 100 basetx, 10 BaseT

 

View the network interface negotiation status

 

[Root @ localhost ~] # MiI-tool-V eth0
Eth0: negotiated 100basetx-fd, link OK
Product Info: vendor 00:00:00, model 0 rev 0
Basic Mode: autonegotiation Enabled
Basic status: autonegotiation complete, link OK
Capabilities: 100basetx-fd 100basetx-hd 10baset-fd 10baset-hd
Advertising: 100basetx-fd 100basetx-hd 10baset-fd 10baset-hd
Link partner: 100basetx-fd 100basetx-hd 10baset-fd 10baset-hd flow-control

This network card works in 100 m full duplex adaptive mode, "basetx-fd" means m full duplex.

 

 

Change Network Interface negotiation method

 

What should I do if I want to change the network interface eth0 to the 10 Mbit/s full duplex mode?

To change the network interface negotiation method, we need to use the-F option, followed by 100baset4, 100basetx-fd, 100basetx-hd, 10baset-fd, 10baset-hd, and other parameters;

 

Command: # miI-tool-F media [interface]

Command miI-tool-F is to change the mode | option | Nic

 

Media optional modes include 100basetx-fd, 100basetx-hd, 10baset-fd, and 10baset-hd. Interface indicates the selected Nic, such as eth0 and eth1. The default value is eth0.

That is:

# MiI-tool-F 10baset-fd eth0

 

Set the NIC to work in 10 M half duplex mode. Enter the following command:

# MiI-tool-F 10baset-hd eth0

 

To restore the adaptive working mode of the network adapter, run the following command:

# MiI-tool-r eth0

 

Note: You may need administrator permissions in Ubuntu to modify or view the NIC.

If you do not have the permission, the system will prompt:

Siocgmiiphy on 'eth0' failed: operation not permitted You do not have permission to operate

In this case, add sudo miI-tool-V eth0 to check the current Nic status.

 

 

Ethtool usage:

 

 

 

Ethtool displays the network port setting function;

Ethtool is a command used to query and set Nic parameters in Linux.

 

Ethtool ethx // query basic ethx network port settings

Ethtool-H // display the ethtool Command help (HELP)

Ethtool-I ethx // query ethx network port information

Ethtool-D ethx // query the registration information of the ethx network port

Ethtool-r ethx // reset the ethx network port to the Adaptive Mode

Ethtool-s ethx // query the ethx network port receiving and receiving packet statistics

Ethtool-s ethx [speed 10 | 100 | 1000] // sets the network port rate to 10/100/1000 m

[Duplex half | Full] // sets the network port half/Full Duplex

[Autoneg on | off] // sets whether the network port is self-negotiated.

This is the interface directly after ethtool, but Ubuntu requires me to install it, so it is useless, but I also set it

 

[Root @ localhost ~] # Ethtool eth0
Settings for eth0:
Supported ports: [tp mii]
Supported link modes: 10 BaseT/half 10 BaseT/full
100 Baset/half 100 Baset/full
Supports auto-negotiation: Yes
Advertised link modes: 10 BaseT/half 10 BaseT/full
100 Baset/half 100 Baset/full
Advertised auto-negotiation: no note: Automatic negotiation is disabled.
Speed: 100 Mb/s Note: Speed: 100 MB
Duplex: Full Note: Full Duplex
Port: MII
Phyad: 32
Transceiver: Internal
Auto-negotiation: Off
Supports wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: Yes Note: eth0 has been activated; ethtool sets the NIC negotiation mode;

 

In the-H help of ethtool, we can see such help information;

Ethtool-s devname/
[Speed 10 | 100 | 1000]/
[Duplex half | Full]/
[Port TP | AuI | BNC | MII | fiber]/
[Autoneg on | off]/

Change the eth0 speed of the network adapter to 10 Mb/s and adopt half duplex;

 

[Root @ cuc03 beinan] # ethtool-s eth1 speed 10 duplex half
[Root @ cuc03 beinan] # ethtool eth1
Settings for eth1:
Supported ports: [tp mii]
Supported link modes: 10 BaseT/half 10 BaseT/full
100 Baset/half 100 Baset/full
Supports auto-negotiation: Yes
Advertised link modes: 10 BaseT/half 10 BaseT/full
100 Baset/half 100 Baset/full
Advertised auto-negotiation: No
Speed: 10 Mb/s Note: Speed: 10 m/s
Duplex: Half note: Half Duplex
Port: MII
Phyad: 32
Transceiver: Internal
Auto-negotiation: Off
Supports wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: no note: eth1 is not activated;

 

Change the eth0 speed of the network adapter to 100 Mb/s and adopt full duplex;

 

[Root @ cuc03 beinan] # ethtool-s eth1 speed 100 duplex full
[Root @ cuc03 beinan] # ethtool eth1
Settings for eth1:
Supported ports: [tp mii]
Supported link modes: 10 BaseT/half 10 BaseT/full
100 Baset/half 100 Baset/full
Supports auto-negotiation: Yes
Advertised link modes: 10 BaseT/half 10 BaseT/full
100 Baset/half 100 Baset/full
Advertised auto-negotiation: No
Speed: 100 Mb/s note: the speed is 100 Mb/s
Duplex: Full Note: Full Duplex
Port: MII
Phyad: 32
Transceiver: Internal
Auto-negotiation: Off
Supports wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: no note: The eth1 Nic is not activated;