This server has two NICs on the motherboard:
02:00.0 Ethernet controller: Broadcom Limited NetXtreme BCM5720 Gigabit Ethernet PCIe
02:00.1 Ethernet controller: Broadcom Limited NetXtreme BCM5720 Gigabit Ethernet PCIe
Both NICs were working correctly (coming up at boot) from time of installation until I installed Samba by configuring my Account Provider to Samba Active Directory. During this process my eno1 interface was converted to a bridge (which worked) and eno2 interface dropped the connection, This caused the Account Provider setup process to fail because without the eno2 interface there was no way to get the RPMs needed. I manually brought up eno2 by issuing ifup eno2 at a command prompt, and then went back and re-started the Account Provider setup. This time it succeeded, presumably because the setup process found the necessary bridge connection was in place and it didn’t need to modify the network configuration this time around. That’s a guess – but the second attempt worked while the first attempt didn’t. But from that point forward, the eno2 interface would not come up on its own after a reboot. Not until I changed BOOTPROTO=none to BOOTPROTO=static in the ifcfg-eno2 configuration file.