FreeBSD: Atheros AR8131 / AR8132 Gigabit Fast Ethernet Driver Configuration

in Categories FreeBSD last updated July 22, 2010

I have installed FreeBSD 8.x on my Laptop with Windows 7 in dual boot mode. But I’m unable to connect to the LAN or Internet using Atheros AR8132 card. How do I configure this card under FreeBSD?

The alc device driver comes with FreeBSD 8.x and above provides support for Atheros AR8131 PCI Express Gigabit Ethernet controllers and Atheros AR8132 PCI Express Fast Ethernet LAN cards. To configure the card edit /boot/loader.conf, enter:
# vi /boot/loader.conf
Append the following entry to load driver:


Save and close the file. You can now reboot the system or type the following command to load it for the current session:
# kldload alc
Run ifconfig to verify that you can see alc0 interface. If not than you need to compile this driver into the kernel, place the following lines in your kernel configuration file:

	   device miibus
	   device alc

See how to compile FreeBSD kernel for more info.

Network Configuration

Now, you can use your GUI tools or ifconfig command to assign IP address:

# ifconfig
# ifconfig alc0 inet YOUR-IP-HERE netmask YOUR-NETMASK-HERE
# ifconfig alc0 inet netmask
# route add default
# ifconfig
# ping

You need to add config to /etc/rc.conf:
ifconfig_alc0="inet netmask"

Finally, edit /etc/resolv.conf and add your DNS name servers:
# vi /etc/resolv.conf
Edit as follows:

Save and close the file. Reboot to make sure that everything is working for you.

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

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