Enabling Internet access in OEL 6.4 64 bit

Issue : After installing OEL 6.4 , Internet was not working.

Solution :

Goto System-> Preferences -> Network Connections
Under Wired
                  -> System eth0  (Edit)
Make sure below are checked.
 -> Connect   automatically
-> Available ti all users

Under Tab - Wired (you will see the Device MAC address , Nothing in Cloned MAC address)
MTU would be set by default as automatic (bytes).

 Under Tab - 802.1X Security - Nothing is checked.

Under Tab - IPv4 Settings :
Addess : <Machine-IP>   , Netmask: <IP> , Gateway- <IP>
In DNS Servers - <DNSIP>  , Nothing in Search domains.
Check - Require IPv4 addressing for this connection to complete.
Nothing on Routes button details.

Under Tab - IPv6 Settings  , Method - Ignore

After addind DNS Servers, restart the network services from root user.
You can verify the settings in /etc/resolv.conf file
----------
# Generated by NetworkManager
search vijoraapps.com
nameserver <Above DNS IP>
----------
Also you can verify the entry in /etc/sysconfig/network-scripts/ifcfg-eth0
You will see dns entry now, like.
DNS1=<DNSIP>

$service network restart

And test the internet.

You can ping 4.4.4.4 ( to check network connectivity)
or ping 8.8.8.8  

Other commands:
ifconfig
setup
system-config-network

1.#ifconfig
2.#vim/etc/sysconfig/network-scripts/ifcfg-eth0
3.#vim /etc/resolv.conf

Refences :
http://docs.oracle.com/cd/E37670_01/E41138/html/ol_about_netconf.html