Network Connection not getting up in RHEL 6

After installing RHEL 6 you may not be able to get network connection up on booting the machine.
This is a reported bug in RHEL 6.

Follow below steps to solve the issue.

Edit  /etc/sysconfig/network-scripts/ifcfg-eth0  file, which is your default first NIC configuration file.



If you are using DHCP server:

Edit below file and change as given below

#vi /etc/sysconfig/network-scripts/ifcfg-eth0


ONBOOT="yes"
BOOTPROTO="dhcp"


Save & restart networking service,

#service network restart 



If you are providing manual IP:


Edit below file and change as given below

#vi /etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
IPADDR=192.10.110.10
NETMASK=255.255.255.0
NETWORK=10.10.10.0
GATEWAY=192.9.110.253
ONBOOT=yes
BOOTPROTO=none
USERCTL=no


Save & restart networking service,

#service network restart