Fat Twin system F617R2-RT+ with X9DRFR, when an external PCI-E quad NIC (intel I340-T4) is attached, the two internal NIC which one are integrated in the motherboard become "invisible" to the system like they are disabled.:
In IPMI it shows like:
System LAN1 MAC address : ff:ff:ff:ff:ff:ff:
System LAN2 MAC address : ff:ff:ff:ff:ff:00
The issue relates to add on card bracket short with Jumper JPL1, please change jumper to top close type to fix this issue.