VRRP (Virtual Router Redundancy Protocol) is a networking protocol that allows us to create a virtual gateway IP address. This is useful since host devices like computers are only able to configure a single default gateway address. When you use a physical router as the default gateway address and the router fails, the computers will be unable to get out of their own subnet. By using VRRP, two routers are able to use a virtual gateway IP address. When one router fails, the other one will take over. These lessons explain how VRRP works and how to configure it.