General Information

VLAN tagging network interfaces.

Checklist

• Distro(s): Enterprise Linux 6/7

By default, the 8021q kernel module should be loaded. Double check.

lsmod | grep 8021q

If no results, load the module

modprobe 8021q

• Configure the regular network interface (parent) with very basic information

  /etc/sysconfig/network-scripts/ifcfg-eth1
   
  DEVICE=eth1
  TYPE=Ethernet
  BOOTPROTO=none
  ONBOOT=yes

• Configure the virtual network interface as the name of the parent plus “.”, then the VLAN ID.
  Example: if the VLAN ID is 20

  /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

• Restart the nework service
  • EL7

    systemctl restart network

  • EL6

    service network restart