Only applies to AOS 5.15 and earlier versions
Should you wish to add NIC cards to your nodes there are several steps to follow to ensure that the process is successful.
Verify that NIC card model is compatible with the hardware. In case of an NX platform the best way would be to contact Nutanix account team.
Look for the documentation describing the process. Nutanix portal has a Hardware replacement section for instructions on all hardware component replacements for all NX platforms.
Once the card is automatically detected the bond and uplinks configuration must be updated using manage_ovs command from CVM.