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Thread: eth0:avahi and no IP by DHCP

  1. #1
    Join Date
    Mar 2008
    Ubuntu 8.10 Intrepid Ibex

    eth0:avahi and no IP by DHCP

    I am using Ubuntu 8.04 being wired to my company network, on which we have to use DHCP.

    From time to time, when I boot the PC I fail in connecting to the network.
    If i run the ifconfig command, I see a weird network interface labelled as eth0:avahi and no IP address is given to standard eth0 IF

    To overcome this, I have to run the following command

    sudo dhclient eth0

    Can anybody explain what's happening ?
    Is there any problem with my DHCP client at boot time ?
    Is there any drawback in removing AVAHI from the system ?

    Thanks in advance for the replies-

  2. #2
    Join Date
    Jan 2007

    Re: eth0:avahi and no IP by DHCP

    go to system->administration->network and go to eth0 properties and select DHCP instead of Roaming mode

  3. #3
    Join Date
    Jun 2008

    Re: eth0:avahi and no IP by DHCP

    I'm running into the same issue, however running sudo dhclient eth0 does not fix my issue (only a reboot does) and my wired interface is set to dhcp, not roaming. Is there another config I need to check? Thanks.

    Also I just want to add I do show an eth0 interface with an ipv6 address, but no ipv4. eth0:avahi has an ipv4 address but no ipv6

    Just adding a little more information. When I am in this state, if I set up eth0 with a static ip like this:


    The ifconfig entry looks correct, but the machine is unable to ping anything.
    Last edited by larubbio; June 9th, 2008 at 05:37 AM.

  4. #4
    Join Date
    Dec 2004

    Re: eth0:avahi and no IP by DHCP

    I'm having the same issues on my work PC. I have tried everything I can think of but no luck. I can get it to connect after about 6 to 10 restarts, but that is totally random.
    Alabama LoCo

    Don't just use Linux, Learn Linux please refer to Proper Documentation.

  5. #5
    Join Date
    Aug 2006
    Ubuntu 7.10 Gutsy Gibbon

    Re: eth0:avahi and no IP by DHCP

    I had the same problem with my network disconnecting every now and then, and when switching between wlan and wired, I got the same eth0:avahi interface and no internet connection. I had to solve it by restarting, but superprash2003's solution seems to have fixed that.

    [EDIT] Scratch that. The connection still dies, except now, my ifconfig output doesn't change. It looks perfectly normal with the usual local IP, but I still don't have a connection.

    Running dhclient gives me "No DHCP offers" received. Still works when I restart the computer though.
    Last edited by Daneel24; June 16th, 2008 at 07:56 PM.

  6. #6
    Join Date
    Jun 2006

    Re: eth0:avahi and no IP by DHCP

    Apologies if this is not related, but after spending a few hours banging my head against the wall trying to get my wireless network working in Hardy Heron 8.04 - the solution was just too embarrassing not to share:

    All the while, I had been right clicking on the network management icon on the system tray to show the "Enable ..." menus ( screenshot attached as screenshot-rightclick.gif )

    After far too many years being conditioned to expect nothing from left clicking system tray icons, I finally tried left-clicking the same network tray icon ( screenshot-leftclick.gif). Shazam - it shows all the available wireless nets and lets me pick one to connect to and it all just worked!

    I realize most are not a dumb as I, but just in case someone else might google the same "eth0:avahi" and "wlan0:avahi" and "wmaster:avahi" keywords, maybe my post will save them some time.

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