Description: The ‘Link Value’ in EIGRP (Enhanced Interior Gateway Routing Protocol) is a metric assigned to each link in the routing table of the protocol. This metric is fundamental in determining the best route that a data packet should take through a network. The Link Value is calculated using several parameters, including bandwidth, latency, load, and link reliability. Unlike other routing protocols that use simpler metrics, EIGRP combines multiple factors to provide a more accurate assessment of link quality. This allows the protocol to make more informed decisions about route selection, thus optimizing network performance. The Link Value is expressed in a numerical format that represents the quality of the link, where a lower value indicates better quality. This metric is essential for the efficient operation of EIGRP, as it enables routers to exchange information about available routes and select the most suitable one for data traffic. In summary, the Link Value is a critical component in the routing process of EIGRP, ensuring that data is transmitted efficiently and reliably across the network.
History: EIGRP was developed by Cisco in 1993 as an enhancement of the Interior Gateway Routing Protocol (IGRP). The introduction of Link Value as a metric was part of this evolution, allowing for better route management in complex networks.
Uses: Link Value is used in enterprise networks to optimize data routing, ensuring that packets follow the most efficient path. It is especially useful in environments where high availability and performance are required.
Examples: A practical example of using Link Value can be seen in a corporate network where multiple links are used between branches. EIGRP evaluates these links and automatically selects the most efficient route based on Link Value.
