Why NIC MACs are getting mismtach for all network interfaces resulting in interfaces to remain in down state at server reboot OR even at service network restart ?

Solution Verified - Updated -

Issue

  • Interfaces do not come up at server reboot and fails with error. ethx interface has different MAC then expected, ignoring.
  • Few of the interfaces comes up with name renameX.
  • Removing the file 70-persistent-net.rules and then rebooting the system will not create this file again.

Environment

  • Red Hat Enterprise Linux 6.x

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