EIGRP stands for Enhanced Interior Gateway Routing Protocol & OSPF stands for Open Shortest Path first. EIGRP is a Hybrid Routing Protocol having the features of both Distance Vector and Link State Routing Protocols. However, OSPF is a link-state routing protocol. EIGRP is a Cisco Proprietary Routing Protocol, but OSPF is standardized by the Internet Engineering Task Force (IETF). EIGRP uses a combination of Bandwidth, Load, Total Delay, Reliability, MTU, Hop Count as its metric. OSPF uses the Path Cost as its metric. EIGRP is the only routing protocol, that supports unequal cost load balancing. However, OSPF only supports equal-cost load balancing. Administrative Distance (AD) Value of EIGRP is 90 & 170 (Internal & External). OSPF AD value is 110. EIGRP Uses Diffused Update Algorithm (DUAL) to calculate the best route. However, OSPF uses the Dijkstra Algorithm to calculate the best path. EIGRP Multicast address is 224.0.0.10 & OSPF Multicast addresses are 224.0.0.5 & 224.0.0.6. EIGRP uses a feasible successor as a backup path for the destination networks. So, the Convergence time is very less as compared with OSPF.