Disaster Recovery - why you need a plan and execute on it

Problems happen.  Fiber cuts can occur out in the wild.  Hardware fails.  Routers go down.  

The last thing you want is to have no backup.  Put the backup in a separate data center facility on separate ISP inputs.  Have multiple electrical feeds into each data center.  

Otherwise you will have a site outage and there will be nothing that can be done to fix it because you are waiting on someone else who you have no control over to fix the problem.