[SOLVED] missing ifcfg-eth0 file CentOS 6.3

[anvjb]

I have installed CentOS 6.3 on a server ,,
but i am not able to get an IP.The ifcfg-eth0 file is not
there in the directory "/etc/sysconfig/network-scripts/".
When i tried :
cat /etc/sysconfig/network-scripts/ifcfg-eth0
I get the error msg :
cat /etc/sysconfig/network-scripts/ifcfg-eth0 : no such file
Then i created ifcfg-eth0 in the same directory which looked
like following--

DEVICE=eth0
BOOTPROTO=dhcp
ONBOOT=yes

still i am not able to get IP, ifconfig eth0 says
-

eth0: error fetching interface information: Device not found

Help me out.

[atreyu]

Are you sure the network device eth0 is present? Try these commands:

ls /sys/class/net

ifconfig

lspci|egrep -i 'eth|net'

-----

Assuming eth0 is there (and I don't think it is), what does this command do (run as root):

dhclient eth0

Look in /var/log/messages on the DHCP server for connection attempts.

[tutika]

Hi anvjb,

I am not sure, you could try following it's not harmful.
Remove the rules in the file /etc/udev/rules.d/70-persistent.net.rules

The rules defined in this way
# PCI device 0x8086:0x100e (e1000)
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:12:76:6d", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0"

So, delete all the lines below the comment "# PCI device 0x8086:0x100e (e1000)". And restart your system. This worked for me.