The Cisco Nexus® 9000 Series Switches operate in one of two modes – Cisco Application Centric Infrastructure (Cisco ACI™) or Cisco NX-OS. In Cisco ACI mode. these switches provide a turnkey. fully automated. policy-based architecture to design and manage data center fabrics. In Cisco NX-OS mode. these switches provide the capability to use foundational layer 2/3 technologies. as well as modern technologies such as VXLAN. with a Border Gateway Protocol‒Ethernet VPN (BGP-EVPN) control plane. Segment routing. Multiprotocol Label Switching (MPLS). and automation via NX-APIs.