#Redhat vlan tagging (802.1Q)

 modprobe --first-time 8021q

 #Configure your physical interface in
 #/etc/sysconfig/network-scripts/ifcfg-ethX, where X is a unique number
 #corresponding to a specific interface, as follows:

 vi ifcfg-eth0

 	DEVICE=eth0
 	TYPE=Ethernet
 	BOOTPROTO=none
 	ONBOOT=yes

 #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:

 vi ifcfg-eth0.192
               ^^^

 	DEVICE=eth0.192          ####
 	VLAN=yes                 ####
 	BOOTPROTO=none
 	ONBOOT=yes
 	IPADDR=192.168.1.1
 	NETMASK=255.255.255.0
 	USERCTL=no
 	NETWORK=192.168.1.0

 service network restart