When setting up the Distributed Data Center, the architect has to decide which method will be used for site selection to distribute client traffic between the sites.

Apart from strictly network oriented tasks (routing, switching, etc) the distribution of client traffic is accomplished with proper site selection. The distribution is done using the GSLB (Geographic Server Load Balancing) typically using:

• HTTP redirect by leveraging the HTTP redirect function,
• DNS based site selection, or
• RHI (Route Health Injection) and L3 routing.