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Thread: Network problem on Ubuntu 11.10

  1. #1
    Join Date
    Dec 2007
    Beans
    2

    Network problem on Ubuntu 11.10

    Hi Guys,

    just wanted to check if someone can help here.
    I did an upgrade of my Ubuntu server today and it ended up with network issues.

    here are the message i was seeing in the different logs :

    in dmesg :
    Code:
     dmesg | grep -e eth -e ipw
    [    1.466604] forcedeth: Reverse Engineered nForce ethernet driver. Version 0.64.
    [    1.467447] forcedeth 0000:00:0a.0: PCI INT A -> Link[LMAC] -> GSI 23 (level, low) -> IRQ 23
    [    1.467464] forcedeth 0000:00:0a.0: setting latency timer to 64
    [    1.530031] forcedeth 0000:00:0a.0: ifname eth0, PHY OUI 0x732 @ 1, addr 00:22:68:64:76:4f
    [    1.530042] forcedeth 0000:00:0a.0: highdma csum pwrctl gbit lnktim msi desc-v3
    [   15.980500] forcedeth 0000:00:0a.0: eth0: link down
    [   26.192030] eth0: no IPv6 routers present
    [  478.442309] forcedeth 0000:00:0a.0: eth0: link up
    [  832.518817] forcedeth 0000:00:0a.0: eth0: link down
    [  835.421232] forcedeth 0000:00:0a.0: eth0: link up
    [  839.628461] forcedeth 0000:00:0a.0: eth0: link down
    [  841.943888] forcedeth 0000:00:0a.0: eth0: link up
    [  843.307022] forcedeth 0000:00:0a.0: eth0: link down
    [  848.488510] forcedeth 0000:00:0a.0: eth0: link up
    [  852.652244] forcedeth 0000:00:0a.0: eth0: link down
    [  854.945595] forcedeth 0000:00:0a.0: eth0: link up
    [  859.090764] forcedeth 0000:00:0a.0: eth0: link down
    [  861.614547] forcedeth 0000:00:0a.0: eth0: link up
    [  865.864822] forcedeth 0000:00:0a.0: eth0: link down
    [  868.200092] forcedeth 0000:00:0a.0: eth0: link up
    [  872.387216] forcedeth 0000:00:0a.0: eth0: link down
    [  874.743186] forcedeth 0000:00:0a.0: eth0: link up
    [  878.972558] forcedeth 0000:00:0a.0: eth0: link down
    [  881.285736] forcedeth 0000:00:0a.0: eth0: link up
    [  885.429424] forcedeth 0000:00:0a.0: eth0: link down
    [  887.765905] forcedeth 0000:00:0a.0: eth0: link up
    [  892.140550] forcedeth 0000:00:0a.0: eth0: link down
    [  894.457873] forcedeth 0000:00:0a.0: eth0: link up
    [  898.600054] forcedeth 0000:00:0a.0: eth0: link down
    [  900.915490] forcedeth 0000:00:0a.0: eth0: link up
    in syslog :
    Code:
    Nov 29 01:57:31 lafouine NetworkManager[769]: <info> (eth0): carrier now OFF (device state 10)
    Nov 29 01:57:31 lafouine kernel: [  885.429424] forcedeth 0000:00:0a.0: eth0: link down
    Nov 29 01:57:33 lafouine NetworkManager[769]: <info> (eth0): carrier now ON (device state 10)
    Nov 29 01:57:33 lafouine kernel: [  887.765905] forcedeth 0000:00:0a.0: eth0: link up
    Nov 29 01:57:37 lafouine NetworkManager[769]: <info> (eth0): carrier now OFF (device state 10)
    Nov 29 01:57:37 lafouine kernel: [  892.140550] forcedeth 0000:00:0a.0: eth0: link down
    Nov 29 01:57:40 lafouine NetworkManager[769]: <info> (eth0): carrier now ON (device state 10)
    Nov 29 01:57:40 lafouine kernel: [  894.457873] forcedeth 0000:00:0a.0: eth0: link up
    Nov 29 01:57:44 lafouine NetworkManager[769]: <info> (eth0): carrier now OFF (device state 10)
    Nov 29 01:57:44 lafouine kernel: [  898.600054] forcedeth 0000:00:0a.0: eth0: link down
    Nov 29 01:57:46 lafouine NetworkManager[769]: <info> (eth0): carrier now ON (device state 10)
    after long research and couple manipulations between 2 switches, I figure out that it was an issue on the NIC driver.

    When I plugg it onto a 100 Meg switch it is working nicely. When i plugg it into a gigabit switch, it is not able to negotiate speed and duplex anymore (since the last update).

    Now I have this working as follow (on a gigabit switch i had to force it to 100 F/D)
    Code:
    ethtool eth0
    Settings for eth0:
            Supported ports: [ MII ]
            Supported link modes:   10baseT/Half 10baseT/Full 
                                    100baseT/Half 100baseT/Full 
                                    1000baseT/Full 
            Supports auto-negotiation: Yes
            Advertised link modes:  Not reported
            Advertised pause frame use: No
            Advertised auto-negotiation: No
            Speed: 100Mb/s
            Duplex: Full
            Port: MII
            PHYAD: 1
            Transceiver: external
            Auto-negotiation: off
            Supports Wake-on: g
            Wake-on: g
            Link detected: yes
    I've used ethtool (apt-get install ethtool) to force the configuration :
    to see the configuration status of your interface
    ethtool eth0

    to force it to 100 F/D
    ethtool -s eth0 autoneg off
    ethtool -s eth0 duplex full
    ethtool -s eth0 speed 100

  2. #2
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    7,963
    Distro
    Ubuntu Mate 20.04 Focal Fossa

    Re: Network problem on Ubuntu 11.10

    Hi,

    NVIDIA-Gigabit cards often need additional module parameters:

    Code:
    echo "options forcedeth msi=0 msix=0" | sudo tee /etc/modprobe.d/forcedeth.conf
    and reboot.

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