Settimg up a new network device in CentOS

If you added a new network device, but upon reboot, CentOS did not represent the card in the /etc/sysconfig/network-scripts/ifcfg-eth*, you may have to manually make aware the device to the OS.

Step 1: Make sure that the OS has detected the new card. From the example below, it detected my 2nd card. If you are unable to detect, you may want to reinstall or check the driver.

# lspci |grep -i ethernet
0b:00.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01)
13:00.0 Ethernet controller: VMware VMXNET3 Ethernet Controller (rev 01)

Step 2: Launch the system-config-network and fill up the necessary information.

# system-config-network

You will see that the system-config-network create an entry at /etc/sysconfig/network-scripts/ifcfg-eth1.

Restart the network

# service network restart