Description: In the context of routing protocols, the term ‘valid’ refers to a route that is currently usable and is not marked as down. This means that the route is active and can be used for data routing within a network. Advanced routing protocols allow routers to exchange information about available routes in a network. Valid routes are those that have been verified and are considered optimal for data traffic, ensuring efficient and reliable communication between devices. The validity of a route is determined through metrics such as bandwidth, latency, and load, among other factors. In summary, a valid route is essential for maintaining the integrity and efficiency of routing within a network, ensuring that data is transmitted effectively and without interruptions.
History: The Enhanced Interior Gateway Routing Protocol (EIGRP) was developed by Cisco in the 1990s as an enhancement of the Interior Gateway Routing Protocol (IGRP). Its introduction occurred in 1993, and since then it has evolved to include advanced features such as fast convergence and the ability to handle large and complex networks. EIGRP became a de facto standard in many enterprise networks due to its efficiency and ease of configuration.
Uses: EIGRP is primarily used in enterprise networks to facilitate dynamic routing between routers. It allows network administrators to manage routes efficiently, optimizing traffic and improving network resilience. Valid routes are crucial to ensure that data flows smoothly and that devices communicate effectively.
Examples: An example of using valid routes in EIGRP is in a corporate network where multiple branches are interconnected. If a router in one branch loses connection to a server, the routing protocol can recalculate valid routes to redirect traffic through another router, ensuring that communication continues without interruptions.
