ethtool won't work on RedHat Enterprise 2.1

Discussion in 'Linux Networking' started by Dean Schulze, Feb 24, 2004.

  1. Dean Schulze

    Dean Schulze Guest

    I'm running RedHat enterprise server 2.1 and have been having trouble
    with this server dropping off of the network. One of our Linux
    admins. said that on their other servers they had to use ethtool to
    set the card to full duplex and autoneg off. Here's what I get:

    # /sbin/ethtool eth0
    Settings for eth0:
    No data available

    # /sbin/ethtool -s eth0 duplex half autoneg off
    Cannot get current device settings: Operation not supported
    not setting duplex
    not setting autoneg

    I've done this with three NICs (3C905Cx, 3C595, and a new LinkSys) all
    with the same results.

    I've also tried three versions of ethtool (1.2, 1.6, and 1.8) all with
    the same results.

    My hardware is an IBM ThinkCentre.

    Anyone have any idea why ethtool doesn't work or why this machine
    keeps dropping off of the network?
    Dean Schulze, Feb 24, 2004
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    Hash: SHA1

    Better tell the network guys to set the switch to autoneg for
    that port.
    It depends on the nic module, if mii-tool/ethtool (or however
    it's named) works or not. Try 'lsmod' and 'modinfo -p
    <module_name>' for more info, perhaps there is another module for
    your nic, supporting those tools. If not, you can set those params
    from /etc/modules.conf, albeit you need to reload the module to
    make changes working.

    Likely you have a bunch of "errors/dropped/etc" in 'ifconfig' output,
    due to duplex mismatch.

    Good luck

    - --
    Michael Heiming - RHCE (GPG-Key ID: 0xEDD27B94)

    Remove +SIGNS and www. if you expect an answer, sorry for
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    Michael Heiming, Feb 24, 2004
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