On Fri, Oct 12, 2018 at 5:23 PM Artem Tambovskiy <artem.tambovskiy@gmail.com> wrote:

I have a question indirectly related to oVirt - I have a VM with CentOS 6 running on my cluster, which has 6 virtual interfaces (eth0 - eth5). Now its a time to do an upgrade to CentOS 7 based, and I did a VM clone to test an upgrade process and was a bit surprised to see that now I have interface names shifted  eth6 - eth11. I would afraid that I'll run out of digits soon :) 

Anyway how to change the interfaces names back to originals and perhaps prevent them form the further changes? I do understand that MAC address has changed, but don't get why it changing the interfaces names. 

Cleaning up everything from /etc/udev/rules.d/70-persistent-net.rules doesn't really helped ..

This is a CentOS 6 old behaviour.
Except the udev rules which you need to update (I think you need to update the mac addresses in order to keep the order), you may need to also touch the ifcfg files if the mac address is mentioned there.

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