CentOS 6.3 Device eth0 does not seem to be present (Minimal non-cloned setup)

centosethernet

I installed CentOS 6.3 on my hardrive partition (new install…minimal install).

After successful installation, I see that eth0 was down. I looked for this file: /etc/udev/rules.d/70-persistent-net.rules but did not find it.

Here's my ifcfg-eth0 settings: Note I had to create this file manually

DEVICE=eth0
HWADDR=*
BOOTPROTO=dhcp
ONBOOT=yes
TYPE=ETHERNET

This machine is connected to Ethernet (I have Windows 7 on another partition and I am able to connect to Internet with that just fine).

$ ifconfig -a | grep eth

returns no result

$ ethtool eth0

returns Cannot get device settings : No such device...

What can I try to get CentOS to detect eth0?

Best Answer

In my situation, I changed the network adapter configuration of my hypervisor after the installation of CentOS. What happened in this case is that the old interface eth0 no longer existed but a new one called eth1 did.

ls /sys/class/net
eth1 lo

I changed the network config /etc/sysconfig/network-scripts/ifcfg-eth0 to use DEVICE=eth1 and it worked again.

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