Crmgo Blog

Linux, changing the network card speed

← Blog

lomix

Linux, changing the network card speed

install ethtool net-tools # ethtool eth0 Output: Or use the mii-tool command as follows: # mii-tool eth0 Output: Task: Change the speed and duplex settings Setup eth0 negotiated speed with mii-tool Disable autonegotiation, and force the MII to either 100baseTx-FD, 100baseTx-HD,…

Linux, changing the network card speed

install ethtool net-tools

# ethtool eth0Output:

Settings for eth0:
     Supported ports: [ TP MII ]
     Supported link modes:   10baseT/Half 10baseT/Full
                             100baseT/Half 100baseT/Full
     Supports auto-negotiation: Yes
     Advertised link modes:  10baseT/Half 10baseT/Full
                             100baseT/Half 100baseT/Full
     Advertised auto-negotiation: Yes
     Speed: 100Mb/s
     Duplex: Full
     Port: MII
     PHYAD: 32
     Transceiver: internal
     Auto-negotiation: on
     Supports Wake-on: pumbg
     Wake-on: d
     Current message level: 0x00000007 (7)
     Link detected: yes

Or use the mii-tool command as follows:

# mii-tool eth0Output:

eth0: negotiated 100baseTx-FD flow-control, link ok

Task: Change the speed and duplex settings

Configure the negotiated speed for eth0 using mii-tool
Disable autonegotiation and force the MII to either 100baseTx-FD, 100baseTx-HD, 10baseT-FD, or 10baseT-HD:

# mii-tool -F 100baseTx-HD
# mii-tool -F 10baseT-H

Configure the negotiated speed for eth0 using ethtool

# ethtool -s eth0 speed 100 duplex full
# ethtool -s eth0 speed 10 duplex half

Note: This post may be AI-assisted and then human-edited. Editorial responsibility: Dmytro Lomaka, Kaltenkirchen.