Red Hat Training

A Red Hat training course is available for Red Hat Enterprise Linux

11.2.7. Setting Up 802.1Q VLAN Tagging

  1. If required, start the VLAN 8021q module by issuing the following command as root: 
    ~]# modprobe --first-time 8021q
    No visual output indicates the module was not running and has now been loaded. Note that given a correct configuration file, the VLAN 8021q module will be loaded as required and therefore does not need to be loaded separately.
  2. Configure your physical interface in /etc/sysconfig/network-scripts/ifcfg-ethX, where X is a unique number corresponding to a specific interface, as follows: 
    DEVICE=ethX
TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes
  3. Configure the VLAN interface configuration in /etc/sysconfig/network-scripts. The configuration filename should be the physical interface plus a . character plus the VLAN ID number. For example, if the VLAN ID is 192, and the physical interface is eth0, then the configuration filename should be ifcfg-eth0.192: 
    DEVICE=ethX.192
BOOTPROTO=none
ONBOOT=yes
IPADDR=192.168.1.1
NETMASK=255.255.255.0
USERCTL=no
NETWORK=192.168.1.0
VLAN=yes
    If there is a need to configure a second VLAN, with for example, VLAN ID 193, on the same interface, eth0 , add a new file with the name eth0.193 with the VLAN configuration details.
  4. Restart the networking service, in order for the changes to take effect. Issue the following command as root: 
    ~]# service network restart