Centos. Cеть.

Настройка сети.
Конфигурационные файлы /etc/sysconfig/network-scripts/
Пример eth0:
cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
BROADCAST=10.2.255.255
DHCPCLASS=
HWADDR=00:1E:67:03:69:D0
IPADDR=10.2.0.80
NETMASK=255.255.0.0
NETWORK=10.2.0.0
ONBOOT=yes
GATEWAY=10.2.0.1

Настройка vlan.
yum install vconfig
modprobe 8021q
Пример:
cat /etc/sysconfig/network-scripts/ifcfg-eth1.28
VLAN=yes
DEVICE=eth1.28
BOOTPROTO=static
ONBOOT=yes
TYPE=Ethernet
IPADDR=10.67.37.22
NETMASK=255.255.255.128

cat /etc/sysconfig/network-scripts/route-eth1.28
10.67.0.0/16 via 10.67.37.1 dev eth1.28