Depending on your operational needs, CMS can be deployed in four phases:
Phase 1: Deploy CMS to only monitor and maintain standalone SMA appliances.
This gives you a dashboard view and a single console from which to monitor and maintain all your SMA appliances.
Phase 2: Enable Central User Licenses on CMS.
Central user licenses allows you to optimize user licenses across all your SMA appliances.
Phase 3: Use CMS to manage configurations.
A centralized policy on the CMS, that is normalized across all your SMA appliances, simplifies configuration management, and gives users a consistent experience when they get connected to any appliance in your VPN infrastructure.
Phase 4: Enable Global High Availability using the Global Traffic Optimization Service.
GTO provides a highly available VPN infrastructure where users connect to a single domain name (such as access.example.com) and get redirected to an available and proximate appliance.
Central User Licensing and centralized policies are required for enabling GTO.