I have a HP Proliant BL685C G7 and both network interfaces are missing.
Rebooted the server and it showed some messages from the network card
be2net 0000:05:00.0 Waiting for POST, 58s elapsed
be2net 0000:05:00.0 POST timeout; stage=0xb00
be2net 0000:05:00.0 PCI INT A disabled
be2net 0000:05:00.0 Emulex OneConnect initialization failed
be2net: probe of 0000:05:00.0 failed with error -1
ACPI: PCI Interrupt Link [I031] enabled at IRQ 29
According to this document HP Store All Storage – Interface ETH 4 and ETH 5 are Missing it is a physical hardware failure and you need to contact HP – even though that the affected equipment is a storage I believe it is the same case with the server.
There is also another document be2net Driver Fails to Initialize where it shows that the NIC fails to initiate and asks you to update to update to a newer kernel or upgrade the NIC firmware. In this case the server’s OS was upgraded recently and firmware updated.
be2net 0000:10:00.0: Emulex OneConnect 10Gbps NIC initialization failed
be2net: probe of 0000:10:00.0 failed with error -1