Daca doriti sa vedeti sau sa schimbati unele setari ale interfetei de retea puteti folosi utilitarul ethtool.

Este foarte simplu de utilizat ..astfel pentru a vedea setarile unei placi..sa zicem eth1 se executa comanda

#ethtool eth1

  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: 1
        Transceiver: internal
        Auto-negotiation: on
        Supports Wake-on: g
        Wake-on: g
        Current message level: 0x00000007 (7)
        Link detected: yes

 Pentru a o seta la viteza de 100 mb/s cu fullduplex  se executa comanda:

 #ethtool -s eth1 speed 100 duplex full autoneg off