View Full Version : [ubuntu] Automatic dhcp

April 19th, 2009, 08:34 AM
I have to manually write the command "sudo dhcpclient" to auto configure eth0.

Is there a faster way? I have ifupdown installed, but I cant get this to work in Networks Manager, there is always a network device called 'lo' that is read only, so I don't know how to add a new network device and establish an automatic dhcp.
I tried adding one manually, and setting Auto DHCP in settings, but that doesn't work.

April 19th, 2009, 08:49 AM
Use ifconfig -a to list all your network interfaces and copy the MAC address for eth0 (HWaddr). Then create a new connection in Network manager and be sure to paste that into the MAC Address bit along with any other settings you may want.

That _should_ do it.

April 19th, 2009, 05:01 PM
Nope, that doesn't do it. Now the connection 'lo' is gone in Network Configuration, and there is my connection, but it says it has errors.
I followed your instructions, copy paste the mac address and leave the dhcp settings to auto.

April 19th, 2009, 05:36 PM
What's in /etc/network/interfaces?

April 19th, 2009, 08:27 PM

auto lo
iface lo inet loopback

auto dsl-provider
iface dsl-provider inet ppp
pre-up /sbin/ifconfig eth0 up # line maintained by pppoeconf
provider dsl-provider

auto eth0
iface eth0 inet manual

April 19th, 2009, 10:10 PM
In a terminal run
sudo service networking stop and sudo service Networkmanager stop

In /etc/network/interfaces file add only the following

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

restart the networking and Network manager services.

April 19th, 2009, 10:31 PM
Yup, that made the trick, thank you!!

Do you mind helping me with this one?

Pidgin can't connect: PPoE + DHCP + Router (http://ubuntuforums.org/showthread.php?t=1130270)