General Information

VLAN tagging network interfaces.

Checklist

• 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 physical interface (parent) with very basic information

/etc/sysconfig/network-scripts/ifcfg-eth1

DEVICE=eth1
TYPE=Ethernet
BOOTPROTO=none
ONBOOT=yes

Configure the VLAN 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
PREFIX=24
NETWORK=10.1.2.0
VLAN=yes

Restart the nework service

• EL7

  systemctl restart network

• EL6

  service network restart