Key requirements are as follows:

• Field surveyors should submit their work orders from their mobile devices through a VPN connection
• There must be a fail-over infrastructure in the multi-site network topology

In this scenario, a geographical survey company has a main office and branch office connected by 1+ GBps hard-link network connectivity. Each office has an identical infrastructure set up. All surveyors use mobile devices, such as tablets, for their survey work. The survey software automatically detects which office IP is live and sends data to the infrastructure of that office. All data is replicated at the block level in real time between the two offices.

If the infrastructure of one office becomes unavailable, staff can simply continue to work using the infrastructure from the other office: