Implementing the EIGRP

It is basically defined as (EIGRP)-Enhanced Interior Gateway Routing Protocol.

It an advanced distance vector routing protocol which was developed by the Cisco. Different sort of topologies and the media are suited for the EIGRP. When the network was in a well-designed and works fine, then the EIGRP scales will provides very quick and extreme convergence times in a minimal overhead. And in the Cisco devices EIGRP is a popular choice for routing the protocols.

Introduction of EIGRP:

It combines the distance vector routing protocols and the advantages of link-state. The EIGRP is a hybrid routing protocol or an advance distance vector which are included in the following features.

• Load balancing: unequal metric load balancing was enabled by the EIGRP. Which helps in the traffic flow in the networks to be better for the administrators.
• Easy summarization: summary routes are created anywhere by the administrators which was enabled by the EIGRP and it was enabled within the network. Rather than to depends on the traditional vector distance and performing the class full at major network places of boundaries.
• Classless routing: EIGRP will advertises a routing mask of various destination network because it is a class routing protocol and it enables the EIGRP to support the (VLSM) variable-length subnet masks and various discontinues Subnetworks.
• Reducing the usage of the bandwidth: the periodic updates are not formed in the EIGRP. And to these when there is a change in path or the metric of the route it sends a partial updates. When information the path changes, an update was sent by the DUAL about that certain link not rather than the entire table.
• Less Overhead: rather than using the broadcast, EIGRP uses the multicast and the unicast. And to this effect the stations at the end are unaffected and requests for the topology information.
• Support of multiple network layer: IP version 6(IPv6), IP version 4(IPv4), AppleTalk, and the Novell internetwork packet Exchange (IPX) are mostly supported by the EIGRP, those area also used in the protocol-dependent modules (PDM). And these PDM are responsible for the network layer protocol requirements. 

Rapid Convergence: And to obtain the rapid convergence the (DUAL) Diffusing Update Algorithm are used by the EIGRP. EIGRP stores all the data and makes a backup which was available from the routers which are using it. And if there was no backup or an appropriate router exits in the system or in the local routing table then the EIGRP queries the neighbours to implement another source of alternate route.  

And in the EIGRP the route are described according to their work the best route is known as a successor route and the backup route is called a feasible successor. The following two types of parameters are used in EIGRP in order to determine the best route and the backup route.

• Feasible Distance: The distance between the advertised particular network and from the neighbour plus for to reach the neighbour.
• Advertised Distance: The metric of a EIGRP to their neighbour for to reach a certain required network.