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Thread: Wired ethernet connection problem

  1. #11
    Join Date
    Dec 2005
    Beans
    40

    Re: Wired ethernet connection problem

    Hello,

    I think I had this same problem but may have found a solution. It started when I installed dd-wrt on my router. I tried creating a static dhcp address for my desktop (running ubuntu). When I would reboot, it would not recognize the connection. When I would run sudo dhclient3 eth0, I would get:

    Code:
    Internet Systems Consortium DHCP Client V3.1.3
    Copyright 2004-2009 Internet Systems Consortium.
    All rights reserved.
    For info, please visit https://www.isc.org/software/dhcp/
    
    Listening on LPF/eth0/00:1d:09:95:39:76
    Sending on   LPF/eth0/00:1d:09:95:39:76
    Sending on   Socket/fallback
    DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
    DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 6
    DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9
    DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 19
    DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 21
    DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3
    No DHCPOFFERS received.
    No working leases in persistent database - sleeping.
    When I turned off static mode, reconnected it to a different eth port on my router and re-ran dhclient3, it would assign a new IP and it would connect. As long as my router was assigning a new IP, it would work. But, if the old lease was in tact after a restart, it wouldn't work regardless of whether I plugged the computer into a different eth port. I would have to go manually into the router and have the router release the IP lease before I could get it to connect.

    It seemed to have fixed itself when I went to preferences > network connections > edit Auto eth0 > IPv4 Settings. Here, I changed method to Automatic (DHCP) instead of Automatic (DHCP) addresses only.

    Once I did that, it seemed to work again. BUT I don't know if this is a permanent fix. I suppose if you don't hear from me again, this problem has not come back up and therefore you may assume it was a permanent fix.

  2. #12
    Join Date
    Jan 2011
    Beans
    45

    Re: Wired ethernet connection problem

    I've been having the same issue, unless the poster above, my Network Manager has always been set to Automatic (DHCP). I'll be keeping an eye on this thread hoping to find a fix.

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