For some network scenarios, users may get confused why the management Ethernet ports cannot be shut off when operation system was off.
It's quite easy to understand from following design concept
- The management Ethernet chip was powered by standby power , means when the system was powered off , the chip still has power fed
- For system which is having management Ethernet ports, there's BMC inside. The side band channel Ethernet chipset directly conduct to BMC device, so the ports is kept in operation state