c6220 ubuntu 14.04 fiber interface not showing

Hello,

we have a c6220 server with ubuntu 14.04 installed.

We have one fiber interface cable connected but "ip a" or "ifconfig -a" doesn't show the interface.

Is it required to install any driver?

lspci is showing the following:

05:00.0 Ethernet controller: Intel Corporation Ethernet 10G 2P X520 Adapter (rev 01)
05:00.1 Ethernet controller: Intel Corporation Ethernet 10G 2P X520 Adapter (rev 01)

Thanks and BR/

Cristina