Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am running Ubuntu 10.10 on a Dell Inspiron 6400. I am able to get 10/100 Ethernet card and Wireless Lan working independently.

  • Ethernet -> eth0
  • Wireless Lan -> eth1.

If I restart/reboot my eth0 turns starts up fine. If I then manually start my wireless connection (eth1), eth0 disappears.

There seems to be issues with wireless drivers: I don't have the cleanest solution but I run this script:

rmmod b43 
rmmod b44 
rmmod ssb
rmmod wl
cp /home/stew/Desktop/brcmDriver/wl.ko  /lib/modules/2.6.35-22-generic/kernel/net/wireless/
modprobe lib80211
insmod wl.

I then do:

wpa-supplicant (with essid and passphrase)
sudo ifup eth1

Is there any way I can have them running simultaneously? From reading around I believe it's possible but not quite sure what I'm doing wrong.

Or any good references that will help me understand from a more fundamental level.

share|improve this question

migrated from Oct 14 '11 at 11:24

This question came from our site for professional and enthusiast programmers.

Did you try with network manager? Does network manager show you both interfaces? – Peltier Oct 14 '11 at 12:03
Firstly apologies I didn't realize this had been moved to superuser (Thanks Gareth for doing that!). I uninstalled network manager as I read it can interfere with NIC bonding which is what my real goal is. But when it was running both interfaces worked (not sure if simultaneously or not.) Any suggestions? – user929821 Oct 19 '11 at 19:10

I would very suggest doing the following:



define the entry for your wired connection like so:

auto eth0
iface eth0 inet static


auto eth0
iface eth0 inet dhcp

You can do the same with Wireless connection as well but I think the Network Manager might work out better for you.

One question I do have to ask is:

Why 2 connections active at the same time?

share|improve this answer
Hi Karlson, I only just saw this! Thank you. I was experimenting with torrent and thought it might be able to take advantage of two different networks, also to provide redundancy and potentially incrementally increase bandwidth. – user929821 Jun 22 '12 at 20:00
@user929821 The potential bandwidth that you can use only depends on your outbound connection and it's utilization – Karlson Jun 22 '12 at 20:15
Two different networks...4G and cable. Although my example show wlan and lan....the eventual target was cable and cell. @Karlson not sure if the at id is working. – user929821 Jun 22 '12 at 20:16
@user929821 at id? – Karlson Jun 22 '12 at 20:45

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.