An engineer is implementing a Cisco UCS environment The requirements for the solution are for the MAC addresses to be learned only on the server-facing ports. The use of the Spanning Tree Protocol mus

End-host mode on Cisco UCS Fabric Interconnects makes the FIs appear as end hosts to the upstream network, effectively preventing them from participating in STP and ensuring MAC addresses are only learned on server-facing ports.

Dynamic pinning automatically assigns vNICs to uplink ports, which does not provide the deterministic traffic handling specifically requested, even if it optimizes uplink utilization.

NPIV (N-Port ID Virtualization) is a Fibre Channel feature used for storage connectivity, and it does not relate to MAC address learning or STP avoidance for Ethernet traffic.

Static pinning in Cisco UCS ensures that server-facing virtual interfaces (vNICs) are consistently mapped to specific physical uplink ports on the Fabric Interconnects, providing deterministic traffic handling and predictability.

Switching mode on Cisco UCS Fabric Interconnects makes the FIs act as traditional network switches, participating in STP and performing MAC learning on all ports, contradicting the requirements.