What is the advantage of EIGRP protocol ?

Enhanced Interior Gateway Routing Protocol (EIGRP) is a unique Cisco innovation.

Highly valued for its ease of deployment and fast convergence, EIGRP is commonly used in many large Enterprise networks. EIGRP maintains all of the advantages of distance-vector protocols, while avoiding the concurrent disadvantages.

EIGRP is a simple protocol to understand and deploy. It's IPv6-ready, scales effectively in a well-designed network, and provides extremely quick convergence times. Other EIGRP advantages include:

• Easy transition to IPv6 with multi-address family support for both IPv4 and IPv6 networks.
• Superior scaling of Interior Gateway Protocol (IGP) for large dynamic multipoint (DM) VPN deployments
• Very fast rapid convergence times for changes in the network topology
• Only routing table changes, not the entire routing table, are propagated, when a change occurs
• More efficient use of links, through equal cost multipath (ECMP) and unequal cost load sharing

EIGRP is an enhanced distance-vector protocol, relying on the Diffused Update Algorithm (DUAL) to calculate the shortest path to a network.

EIGRP is mix of distance vector and link state feature oriented routing protocol that uses DUAL for route calculation. It was Cisco proprietary but since it is been declared open source. It uses5 K values to calculate shortest path and is the only protocol that can provide unequal load balancing. Also provides encryption for security and can be used with iBGP for WAN routing.

It support un equal cost path load balancing

it support summarization at any interface

it create successor & feasible successor.

Enhanced Interior Gateway Routing Protocol (EIGRP) is an advanced distance-vector routing protocol that is used on a computer network to help automate routing decisions and configuration. Theprotocol was designed by Cisco Systems as a proprietary protocol, available only on Cisco routers.

EIGRP: Enhanced Interior Gateway Routing Protocol ¤ Advanced distance-vector algorithm ¤ Full routing information only exchanged once upon neighbor establishment, after which only partial updates are sent ¤ Advantage: Reduces traffic by using “need-based” updates ¤ Disadvantage: Proprietary protocol (only compatible with Cisco technology)