Ubuntu
yelp package

How do i set a prefered network interface

Asked by Pétur Ingi Egilsson

Hello

I have a laptop.

Sometimes i need to connect a wire to eth0 cos i need to transfer large data sets.

My wireless wlan0 is always connected, meaning its sometimes connected at same time as the eth0 wiredconnection.

wlan0 and eth0, if connected at the same time are always on the same ip-network

I need a way to nail eth0 down as the primary interface (if in use), and else use wlan0.

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Ubuntu yelp Edit question
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Best anonymous1 (anonymous1-deactivatedaccount) said : 		#1

Open "/etc/network/interfaces" in your preferred editor.

# The primary network interface
auto eth0
iface eth0 inet static
        address 10.0.0.2
        netmask 255.255.255.252
        gateway 10.0.0.1
        broadcast 10.0.0.3

eth0 is defined as the primary network interface in the above example, check yours.

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Pétur Ingi Egilsson (petur) said : 		#2

petur@O2:~$ cat /etc/network/interfaces
auto lo
iface lo inet loopback

The network is configured using NetworkManager

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anonymous1 (anonymous1-deactivatedaccount) said : 		#3

Customizing the example that I wrote above will automatically make eth0 the primary network interface.

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Pétur Ingi Egilsson (petur) said : 		#4

Thanks Steffan Wood, that solved my question.