Linux Change network speed ethtool

Check network speed

~# ethtool eth0
Settings for eth0:
       Supported ports: [ TP ]
       Supported link modes:   10baseT/Half 10baseT/Full
                               100baseT/Half 100baseT/Full
                               1000baseT/Full
       Supported pause frame use: No
       Supports auto-negotiation: Yes
       Advertised link modes:  10baseT/Half 10baseT/Full
                               100baseT/Half 100baseT/Full
                               1000baseT/Full
       Advertised pause frame use: No
       Advertised auto-negotiation: Yes
       Speed: 100Mb/s
       Duplex: Full
       Port: Twisted Pair
       PHYAD: 1
       Transceiver: internal
       Auto-negotiation: on
       MDI-X: Unknown
       Supports Wake-on: g
       Wake-on: d
       Link detected: yes

Change speed to 1000Mbps

ethtool -s eth0 speed 1000 duplex full autoneg on

~# ethtool eth0
Settings for eth0:
       Supported ports: [ TP ]
       Supported link modes:   10baseT/Half 10baseT/Full
                               100baseT/Half 100baseT/Full
                               1000baseT/Full
       Supported pause frame use: No
       Supports auto-negotiation: Yes
       Advertised link modes:  1000baseT/Full
       Advertised pause frame use: No
       Advertised auto-negotiation: Yes
       Speed: 1000Mb/s
       Duplex: Full
       Port: Twisted Pair
       PHYAD: 1
       Transceiver: internal
       Auto-negotiation: on
       MDI-X: Unknown
       Supports Wake-on: g
       Wake-on: d
       Link detected: yes

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Daniel Simao (talk) 13:11, 20 July 2018 (EDT)