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Wireless and Ethernet NIC Bonding - good for laptops
I'm running Debian Sid but this should work on Lenny as well.
I have a docking station at home and sometimes un-dock it to go sit outside, in my sun room, living room etc, and still have my umbilical cord to the internet handy. The beauty of this method is that it keeps your MAC address and IP address the same on the network and fail-over is instantaneous which has various obvious benefits such as not having to pause a torrent download and reconfigure firewall rules for your laptop for example. Install ifenslave: :: Code :: apt-get install ifenslaveMy /etc/network/interfaces file looks like this (replace the ssid and password for yours). I haven't configured it without WPA-PSK so cannot help you with configs other than that but it shouldn't be to hard to work out. :: Code :: # This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # Bonding interface auto bond0 iface bond0 inet dhcp bond_mode active-backup bond_primary eth0 bond_miimon 100 bond_downdelay 200 bond_updelay 200 wpa-ssid wifi wpa-ap-scan 1 wpa-psk wpapassword wpa-scan-ssid 1 wpa-iface wlan0 slaves eth0 wlan0 At this stage you could probably: :: Code :: modprobe bonding
ifdown eth0 ifdown wlan0 /etc/init.d/networking restart But i just rebooted. This then allows eth0 to be used when it is connected and fails over to wireless when not connected. When I run a ping it never drops a packet when switching - very cool! No more meddling with my networking :) Back to top |
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Welcome to the forums, feel absolutely free to post any how-tos like this any time you want, any quality how to do anything posting is always welcome here, especially related to free software, linux, and debian specifically.
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Update for new installs from 26.04.2010
I found that after a reinstall of Debian Sid that this config no longer worked.
After a bit of googling I came across this bug report So I Manually downloaded the Lenny ifenslave package from here and installed it. In my case the commands looked like this. You will need to update the wget and dpkg commands with the package you end up downloading. :: Code :: cd /var/cache/apt/archives/
wget http://ftp.au.debian.org/debian/pool/main/i/ifenslave-2.6/ifenslave-2.6_1.1.0-10_amd64.deb dpkg -i ifenslave-2.6_1.1.0-10_amd64.deb And then I ran an upgrade to get the latest ifenslave package :: Code :: apt-get update && apt-get dist-upgradeYou could run smxi of course. I also updated the interfaces config as follows, this may not be necessary however since it's hotplugged it no longer causes a delay at boot when bringing up the interface. Take a look at the examples in /usr/share/doc/ifenslave-2.6/examples/ :: Code :: # This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback #auto bond0 allow-hotplug bond0 iface bond0 inet dhcp bond-slaves eth0 bond-mode active-backup bond-miimon 100 bond-primary eth0 allow-hotplug wlan0 iface wlan0 inet manual bond-master bond0 bond-mode active-backup bond-miimon 100 bond-give-a-chance 10 wpa-bridge bond0 wpa-scan-ssid 1 wpa-ap-scan 1 #wpa-iface wlan0 wpa-ssid wifi wpa-psk "wpapassword" I still cannot get VirtualBox to bridge the bond0 interface when the wireless is active unfortunately, only works when ethernet is the active slave. Cheers Back to top |
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