Cisco ACI

Cisco Application Centric Infrastructure - Landing page
https://www.cisco.com/c/en/us/solutions/data-center-virtualization/application-centric-infrastructure/index.html

ACI Multi-Pod:
https://www.cisco.com/c/en/us/solutions/collateral/data-center-virtualization/application-centric-infrastructure/white-paper-c11-737855.html

ACI White Papers:
https://www.cisco.com/c/en/us/solutions/data-center-virtualization/application-centric-infrastructure/white-paper-listing.html

ACI Apps:
https://aciappcenter.cisco.com/

ACI NSX:
https://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-series-switches/white-paper-c11-740124.html#_Toc505115562

Ansible Labs for ACI:
https://learninglabs.cisco.com/modules/ansible-aci-intro