13.6.5 Global network management and dynamic NAT or dynamic PAT
At least one static or routable (non-translated) address must exist per regional manager. This enables NNMi management servers to communicate with each other, keeping communications internal and secure.
If a regional manager is located behind a NAT firewall, its external address must be static.
For details about global network management, see 15. Global Network Management. See also Tenant Best Practices for Global Network Management in NNMi Help.