Interface réseau Fibre ou Ethernet ?

La commande ethtool permet d’afficher et de modifier certains paramètres de la carte réseau. Avant d’utiliser cette commande il est utile de lancer ifconfig pour connaitre les noms de vos interfaces réseau.

Fibre ou Ethernet

La différence entre un port réseau ethernet et fibre se fait au niveau de la ligne Supported ports

Fibre

Ici la ligne Supported ports renvoie [ FIBRE ]

# ethtool eno66
Settings for eno66:
        Supported ports: [ FIBRE ]
        Supported link modes:   10000baseT/Full
        Supported pause frame use: Symmetric
        Supports auto-negotiation: No
        Supported FEC modes: Not reported
        Advertised link modes:  10000baseT/Full
        Advertised pause frame use: Symmetric
        Advertised auto-negotiation: No
        Advertised FEC modes: Not reported
        Speed: 10000Mb/s
        Duplex: Full
        Port: Direct Attach Copper
        PHYAD: 0
        Transceiver: internal
        Auto-negotiation: off
		Cannot get wake-on-lan settings: Operation not permitted
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

Ethernet

Ici la ligne Supported ports renvoie [ TP ]

# ethtool eno42
Settings for eno42:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Half 1000baseT/Full
        Advertised pause frame use: Symmetric
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: Unknown!
        Duplex: Unknown! (255)
        Port: Twisted Pair
        PHYAD: 4
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: Unknown
		Cannot get wake-on-lan settings: Operation not permitted
        Current message level: 0x000000ff (255)
                               drv probe link timer ifdown ifup rx_err tx_err
        Link detected: no

Documentation

https://linux.die.net/man/8/ethtool

Remerciements

Martin B.

Merci à Martin B.