Linux: Скорость сетевого интерфейса

Для проверки текущих настроек сетевого интерфейса:

ethtool eth0
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 pause frame use: No
        Advertised auto-negotiation: Yes
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
        Link partner advertised pause frame use: No
        Link partner advertised auto-negotiation: Yes
        Speed: 100Mb/s
        Duplex: Full
        Port: MII
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: pumbg
        Wake-on: d
        Current message level: 0x00000001 (1)
        Link detected: yes

Для выключения Auto-Negotiate выполним такую команду:

ethtool -s eth0 autoneg off

Для установки скорости 10 Мбит и duplex half выполняем такую команду:

ethtool -s eth0 speed [SPEED] duplex  [DUPLEX]
ethtool -s eth0 speed 10 duplex half