System NIC does not get activated at boot time

Hi,

Our Cavium ThunderX system's system NIC can not get activated upon boot 
for some reason. To make it active, we need to re-plug the network 
cable. The system is GIGABYTE R150-T62-00 (T45 BIOS), and is powered by 
CentOS 7 (kernel is 4.5.0-25.el7). Has anyone seen this kind of issue on
a ThunderX system?

Itaru