if you define a network bridge in e.g ifcfg-kvmbr0 script and start the the bridge interface:<br />
ifup kvmbr0 <enter><br />
you get the errormessage:<br />
"can't add kvmbr0 to bridge enp1s0: Operation not supported"<br />
<br />
after correction of the ifup-eth script with the bridge running you get a similiar errormessage:<br />
ifdown kvmbr0 <enter><br />
"can't delete kvmbr0 from enp10: Operation not supported"
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