Description: Hybrid routing is an approach that combines features of link-state routing and distance-vector routing to optimize network performance. This method seeks to leverage the advantages of both routing types, allowing for greater efficiency in route management and better convergence. In hybrid routing, routers can exchange information about the network topology and routing metrics, enabling them to make more informed decisions about how to direct traffic. One of the most well-known implementations of this routing type is the Enhanced Interior Gateway Routing Protocol (EIGRP), developed by Cisco. EIGRP uses an advanced routing algorithm that combines the speed of distance-vector protocols with the robustness of link-state protocols. This allows EIGRP to maintain a more accurate and up-to-date routing table, minimizing downtime and improving overall network efficiency. Hybrid routing is particularly useful in large and complex networks, where the ability to quickly adapt to changes in topology is crucial for maintaining optimal performance.
History: EIGRP was introduced by Cisco in 1994 as an improvement over the Interior Gateway Routing Protocol (IGRP). Over the years, EIGRP has evolved to include advanced features such as the ability to perform multiprotocol routing and the implementation of metrics based on bandwidth, delay, load, and reliability. In 2013, Cisco announced that EIGRP would become an open standard, allowing its use on devices from various manufacturers.
Uses: Hybrid routing is primarily used in enterprise and service provider networks where efficient traffic management and rapid convergence are required. EIGRP, as a hybrid protocol, is commonly implemented in large and complex network environments where the ability to adapt to changes in topology is essential for maintaining connectivity and performance.
Examples: A practical example of hybrid routing usage is in a corporate network connecting multiple branches. By implementing EIGRP, the company can ensure that traffic between branches is directed efficiently, quickly adapting to any network failures and optimizing the use of available bandwidth.
