Vlan Ubuntu

802.1q VLAN HOWTO

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Doing 802.1q trunking to an Ethernet switch is really easy. I describe two methods - a text only one for servers, and a GUI one for desktops.

The VLAN number that an interface uses always gets appended to the physical interface after a dot, so for instance an interface eth0 using VLAN number 99 would be called eth0.99. The instructions below all assume you want to connect to vlan 99 - change the number as required.

Server console method
Install the vlan package:

Code:

sudo apt-get install vlan

Load the 8021q kernel module:

Code:

sudo modprobe 8021q

Ensure that this module gets loaded after a reboot by adding to /etc/modules:

Code:

sudo  sh -c 'grep -q 8021q /etc/modules || echo 8021q >> /etc/modules'

Configure the interface by editing /etc/network/interfaces:

Code:

sudo nano /etc/network/interfaces

and adding a stanza like this:

Code:

auto eth0.99
iface eth0.99 inet static
address 192.168.99.1
netmask 255.255.255.0

Then bring the interface up:

Code:

sudo ifup eth0.99

Desktop GUI method
Install the vlan package using Synaptic: System->Administration->Synaptic Package Manager
and search for and install the package 8021q.

The next bit has to be done from the command line.
Load the 8021q kernel module:

Code:

sudo modprobe 8021q

Ensure that this module gets loaded after a reboot by adding to /etc/modules:

Code:

sudo  sh -c 'grep -q 8021q /etc/modules || echo 8021q >> /etc/modules'

Now we have to create a low-level interface that the network manager can see:

Code:

vconfig add eth0 99

Now we can find eth0.99 in the GUI System->Administration0>Network and configure it how we want.

sumber : http://ubuntuforums.org/showthread.php?t=703387