The Enhanced Interior Gateway Routing Protocol (EIGRP9) is an advanced distance-vector routing protocol that is used on a computer network to help automate routing decisions and configuration. The protocol was designed by Cisco Systems as a proprietary protocol, available only on Cisco routers, but Cisco converted it to an open standard in 2013.^[1] EIGRP allows a router to share information it knows about the network with neighboring routers within the same logical area known as an autonomous system. Contrary to other well known routing protocols, such as routing information protocol, EIGRP only shares information that a neighbouring router would not have, rather than sending all of its information. EIGRP is optimized to help reduce the workload of the router and the amount of data that needs to be transmitted between routers