Here’s a quick video that demonstrates how you can achieve site failover with via the KEMP Loadmaster Global Balancing feature. As long as you know what this can do for you and realize that it about site failover and high availability and not continuous availability without a second of service interruption you can deliver nice results with this technology across city campuses or between cities.
In our scenario we normally connect to the primary data center (weighted round robin) and fail over to the DRC when the primary site fails for some reason.
It’s very busy at the moment but I hope to address this topic a bit more in detail in the future. All of this runs virtualized on Hyper-V and performs just fine.