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I use static IP adresses.

When changing the IP of a network interface (eth0 or wlan0) the settings are saved to the network connections but when running ifconfig or looking at Network Settings, either connections retain the old IP address.

I have tried restarting the networking service, the computers (yes, this occurs on more than one) and even reinstalling the OS.

PLEASE can somebody help me. I'm losing out on so much work this past week just trying to get Ubuntu 12.04 working like a normal OS.

Using the command sudo ip addr add 192.168.0.1/24 dev eth0 SOMETIMES works... the command switches the interface off, then when re-enabling it the IP reverts again. AAARGH!

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Does it help to turn off the device via sudo ifconfig eth0 up and turn it on again with sudo ifconfig eth0 down. Does this help? –  jP_wanN May 3 '12 at 8:41
    
I have tried doing so, when the interface is up again it reverts to the old IP settings. Problem is whenever I change the IP, the interface goes down with the correct settings until I turn it on again. –  beanaroo May 7 '12 at 9:19

1 Answer 1

I`m not a geek! I just want to share my experience. try stopping some services like network-manager! like: sudo service network-manager stop I could not change my mac... but after stopping network-manager I could change my mac permanently. remember not to restart it, but to change settings during the stopped services!!!

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Thanks, samphil. Turning off / restarting the network-manager doesn't seem to have an effect. –  beanaroo May 7 '12 at 9:20

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