A critical feature of the Nexus 1000V was its implementation of Virtual Extensible LAN (VXLAN) technology. In a standard AWS environment, network segmentation is limited by the constraints of VLANs and the complexity of managing IP addresses across multiple accounts. VXLAN allowed the Nexus 1000V to create overlay networks that could span across different subnets and availability zones, providing isolation for multi-tenant environments or complex application tiers.
Granular Quality of Service (QoS), application visibility through NetFlow, and Zone-Based Firewall (ZBFW) capabilities. cisco 1000v aws