Ethtool unable to determine speed and duplex values of interface even though interface is up

Solution Verified - Updated -

Issue

  • Network interface eth2 does not work properly and needs to be used.
  • Speed and Duplex can not be determined.
# ethtool eth2
Settings for eth2:
    Supported ports: [ TP ]
    Supported link modes:   10baseT/Half 10baseT/Full
    100baseT/Half 100baseT/Full
    1000baseT/Full
    Supports auto-negotiation: Yes
    Advertised link modes:  1000baseT/Full
    Advertised auto-negotiation: Yes
    Speed: Unknown! (65535)
    Duplex: Unknown! (255)
    Port: Twisted Pair
    PHYAD: 1
    Transceiver: internal
    Auto-negotiation: on
    Supports Wake-on: g
    Wake-on: g
    Link detected: no


# cat ifcfg-eth2
# Broadcom Corporation NetXtreme II BCM5709 Gigabit Ethernet
DEVICE=eth2
BOOTPROTO=static
DHCPCLASS=
HWADDR=D8:D3:85:A4:A0:FA
IPADDR=195.42.52.72
NETMASK=255.255.255.0
ONBOOT=yes
# ajout PCH
ETHTOOL_OPTS="speed 1000 duplex full autoneg on"

Environment

  • Red Hat Enterprise Linux 5.4

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