# Deployment Models and Failover Requirements

When configuring the Global Command Center, the failover behavior and high availability depend on the deployment model. Below are the supported deployment models and their specific requirements.

## Deployment Model 1: Distributed Components Across Machines

This model is ideal for scalability, flexibility, and high availability.

### Setup

CommServe, Web Server, and Command Center are installed on two or more separate machines.

### Failover Requirements

Set up static Third-Party Port Mappings (TPPM) to enable communication between the Command Center and Web Server machines.

Note

- Static TPPM is enabled by default between the CommServe and Web Server.

- If firewalls are disabled between machines, static TPPM configuration is not required.

### Scenarios

- CommServe (CS) and Web Server on the same machine; Command Center on a separate machine: Static TPPM configuration is required between the Command Center and Web Server to ensure communication and failover support.

- CommServe (CS), Web Server, and Command Center all on separate machines: Static TPPM configuration is still required between the Command Center and Web Server, regardless of the CommServe’s location.

## Deployment Model 2: All Components On a Single Machine

### Setup

CommServe, Web Server, and Command Center are all installed on the same machine.

### Failover Requirements

Use a floating hostname for the Global Command Center to support failover.

## Related Topics

CommServe LiveSync For High Availability Disaster Recovery

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