Unable to activate eth0 under RHEL6

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Setup a new RHEL6 server and wasn't able to ping other servers on the network.

When running

ifdown eth0 
ifup eth0

ifup eth0 RTNETLINK answers: File exist

I also get the same when running, service network stop and service network start.

Looking under /etc/sysconfig/network-scripts, there was no eth0 file. So I create the file, however I don't have a UUID in it. Also check under /etc/udev/rules.d and the file 70-persistent-net.rules exist too. I've also deleted out /etc/udev/rules.d/70-persistent-net-rules and rebooted along with creating a new eth0 file.

However...

ifup eth0 
Determing if ip address 192.168.122.150 is already in use for device eth0...

However I still cannot ping other servers on the subnet.

I'm wondering what I can do to fix this.

CM

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