Description: The diffuse update algorithm used by EIGRP (Enhanced Interior Gateway Routing Protocol) is a fundamental component in route management within computer networks. This algorithm allows EIGRP to efficiently calculate and maintain routes, using an approach that combines features of distance vector and link state protocols. Through the dissemination of updates, EIGRP can propagate information about changes in the network topology, enabling routers to adjust their routing tables in real-time. One of the most notable features of this algorithm is its ability to perform incremental route calculations, meaning that updates are only sent when there are significant changes, thus reducing the load on the network. Additionally, EIGRP uses composite metrics that consider multiple factors, such as bandwidth, latency, and load, to determine the best route to a destination. This flexibility and efficiency make EIGRP’s diffuse update algorithm a popular choice in complex network environments, where adaptability and rapid convergence are essential for network performance.
History: EIGRP was developed by Cisco in the 1990s as an improvement over the IGRP (Interior Gateway Routing Protocol). Its introduction was due to the need for a more efficient and scalable routing protocol that could handle larger and more complex networks. EIGRP was designed to overcome the limitations of IGRP, incorporating advanced features such as the DUAL (Diffusing Update Algorithm), which allows for faster convergence and better utilization of network resources. In 2013, EIGRP was released as an open standard, allowing its implementation on devices from other manufacturers, thus expanding its use in various network infrastructures.
Uses: EIGRP is primarily used in enterprise and service provider networks to manage data routing between different network segments. Its ability to quickly adapt to changes in network topology makes it ideal for environments where availability and performance are critical. Additionally, EIGRP is used in network configurations that require high availability and redundancy, such as in the implementation of wide area networks (WAN) and in the interconnection of multiple geographic sites.
Examples: A practical example of EIGRP usage can be seen in a multinational company with several branches in different countries. By implementing EIGRP, the company can ensure that all its routers communicate efficiently, quickly adapting to any changes in the network, such as the addition of new branches or modification of existing links. Another example is in an Internet service provider that uses EIGRP to manage data traffic between its data centers and customers, ensuring fast and reliable service delivery.
