====== VLAN Tagging ======

**General Information**

VLAN tagging network interfaces. 

**Checklist**
  * Distro(s): Enterprise Linux 6/7

----

====== Ensure Kernel Module is Loaded ======

By default, the 8021q kernel module should be loaded. Double check.
<code bash>
lsmod | grep 8021q
</code>

If no results, load the module
<code bash>
modprobe 8021q
</code>

----

====== VLAN Tagging: ifcfg files ======

  * Configure the regular network interface (parent) with very basic information<code bash>
/etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1
TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
</code>

  * Configure the virtual network interface as the name of the parent plus ".", then the VLAN ID. \\ Example: if the VLAN ID is 20<code bash>
/etc/sysconfig/network-scripts/ifcfg-eth1.20

DEVICE=eth1.20
BOOTPROTO=none
ONBOOT=yes
IPADDR=10.1.2.3
NETMASK=255.255.255.0
GATEWAY=10.1.2.254
VLAN=yes
</code>
  * Restart the nework service
    * EL7<code bash>systemctl restart network</code>
    * EL6<code bash>service network restart</code>

----