# ifconfig -a
# ifconfig eth0 up
# ethtool eth0
# ifconfig eth0 inet 172.16.1.X/24
# route add default gw 172.16.1.254
# route add -net 192.168.6.0 netmask 255.255.255.0 gw 172.16.1.6

# ip addr show dev eth0
# ip addr add 172.16.1.100+X/32 dev eth0
# ip addr del 172.16.1.100+X/32 dev eth0

...
# PCI device 0x1022:0x2000 (pcnet32)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:0c:29:18:7f:01", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"
...

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
        address 172.16.1.X
        netmask 255.255.255.0
        gateway 172.16.1.254

# Alias example
# auto eth0:0
# iface eth0:0 inet static
#         address 10.5.Z.X
#         netmask 255.255.255.0

# Bridge example (need bridge-utils packet)
# auto br0
# iface br0 inet static
#         address 172.16.1.X
#         netmask 255.255.255.0
#         gateway 172.16.1.254
#         bridge_ports eth0 eth1
#         bridge_stp off
#         bridge_maxwait 5
#         post-up /usr/sbin/brctl setfd br0 0

# 802.1q example (need vlan packet)
# auto vlan2
# iface vlan2 inet static
#         address 192.168.100+X.1
#         netmask 255.255.255.0
#         mtu 1500
#         vlan_raw_device eth0

gate.corpX.un

127.0.0.1       localhost

172.16.1.X      gate.corpX.un gate
172.16.1.254    rep

search corpX.un
nameserver 172.16.1.254

# hostname gate.corpX.un

root@gate:~# ifup eth0

# mii-tool 

# ethtool eth0

# netstat -apn

# netstat -apn --tcp