EIGRP
Enhanced Interior Gateway Routing Protocol EIGRP EIGRP is a Cisco protocol that runs on Cisco routers and on some Cisco switches. EIGRP is a Cisco-proprietary Hybrid routing protocol, incorporating features of both Distance-Vector and Link-State routing protocols. EIGRP Features and Operations (i) EIGRP uses Diffusing Update Algorithm (DUAL) to determine the best path among all “feasible” paths. DUAL also helps ensure a loopfree routing environment. (ii) EIGRP will form neighbor relationships with adjacent routers in the same Autonomous System (AS) . (iii) EIGRP traffic is either sent as unicasts, or as multicasts on address 224.0.0.1 depending on the EIGRP packet type. (iv) Reliable Transport Protocol (RTP) is used to ensure delivery of most EIGRP packets. (v) EIGRP routers do not send periodic, full-table routing update...