Cisco Application Centric Infrastructure - ACI Fabric L3Out White Paper - Cisco
Configuring NXDB for Cisco Nexus 9000 Series Switches and Communicating with NSXv Controllers (for Layer 2 VXLANs), Release 7.x - Using the Cisco Nexus 9000 Switch as the Default Gateway [Cisco Nexus 9000 Series Switches] - Cisco
L3 switch SVI routing & device default gateway - Cisco Community
Cisco Application Centric Infrastructure - ACI Fabric L3Out White Paper - Cisco
Basic Switch Configuration (2.1) > Cisco Networking Academy's Introduction to Basic Switching Concepts and Configuration | Cisco Press