If I need to deploy 15000 branch offices to a Hub/data center location how much controller is required and how do I manage segmentation? I need to know the design part.
This required bit of planning, based on the regions and geo location based. (i would suggest to engage with cisco partner who can offer you better price and professional service) - since high level deployment always get involved with cisco valid design so they undertake any issue with their BU.
for information you can look below guide Control Component Scaling:
