What is EIGRP? Enhanced Interior Gateway Routing Protocol (EIGRP) is an enhanced distance vector routing protocol which uses Diffused Update Algorithm (DUAL) to calculate the shortest path. It is also considered as a Hybrid Routing Protocol because it has characteristics of both Distance Vector and Link State Routing Protocols.EIGRP supports classless routing and VLSM, route summarization, incremental updates, load balancing, and other features. What are the requirements for neighborship in EIGRP? The following fields in a hello packet must match for routers to become neighbors:- 1. Autonomous System number. 2. K-values. 3. Authentication. 4. The primary address should be used. 5. If static neighborship then should be defined on both sides. What is the metric of the EIGRP protocol & its default values? 1. Bandwidth (K1=1) 2. Load (K2=0) 3. Delay (K3=1) 4. Reliability (K4=0) 5. Maximum Transmission Unit (K5=0) By default, EIGRP only uses Bandwidth (K1) and Delay
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