Refer to the exhibit. Refer to the exhibit. An engineer is creating a new data center design for a customer. The design must support virtual…

The design requires extending Layer 2, fast convergence, and MAC address learning independent of the control plane. Virtual Port-Channel (vPC) meets these needs by allowing a downstream switch to connect to two upstream switches via a port-channel, creating a single logical switch. This provides Layer 2 multipathing and high availability. In a vPC environment, MAC addresses are learned via the data plane through standard hardware-based learning on the physical ports, not through a control plane protocol. This directly satisfies the requirement that MAC advertisement not depend on the control plane.

BGP-EVPN: This is a control-plane technology where MAC addresses are advertised as BGP routes, which contradicts a key requirement. DMVPN: This is a WAN technology for building scalable VPNs and is not used for Layer 2 extension between access and distribution switches in a data center. DVSTB: This is not a standard or recognized Cisco data center technology for this purpose.

1. Cisco Press. (2019). CCNP Data Center DCID 300-610 Official Cert Guide. Chapter 4, "Traditional Data Center Technologies," Section "Virtual Port Channel (vPC)". "With vPC, MAC address learning is done in the data plane, not in the control plane."

2. Cisco. (2023). Cisco Nexus 9000 Series NX-OS Virtual Port-Channel Configuration Guide, Release 10.3(x). Section "vPC Overview". The document describes vPC as a technology that "allows links that are physically connected to two different Cisco Nexus 9000 Series devices to appear as a single port channel."

3. Cisco. (2017). Virtual PortChannel (vPC) Operations and Design with Cisco Nexus 7000. Section "vPC Data Plane," Paragraph 1. "The vPC data plane is responsible for packet forwarding. MAC address learning is done in hardware..."