Unit 1: Network Infrastructure
This will allow you to demonstrate your networking skills, knowledge, and abilities, with a focus on enterprise-level switching, routing, and multicast components that support cross-platform (inter)operability and integration with the most recent software-defined technologies.
It is necessary for EIGRP to initially find its neighbor before any EIGRP update packets can be exchanged between routers. An nearby router that is running EIGRP on networks that are directly connected is referred to as an EIGRP neighbor. EIGRP Hello packets are utilized in the process of establishing and maintaining adjacencies between neighbors.
When creating neighbor adjacencies, it is necessary for the two routers to have a number of characteristics that are identical in order for them to be considered neighbors. For instance, the autonomous system number and EIGRP metric in both routers must be identical.
Every router that is enabled with EIGRP keeps a list of other routers that are associated with this router in terms of their EIGRP neighbor adjacencies. A list like this is referred to as the neighbor table.
In order to monitor the current condition of EIGRP neighbors, the router makes use of the neighbor table. The process of exchanging two EIGRP routers’ initial EIGRP Hello packets and determining the neighbor procedure is depicted in the figure that may be found below.
The router that is set up for EIGRP sends an EIGRP hello packet. When another router that is set for EIGRP gets that Hello packet, it adds that router to its list of neighbors. As an example
- Router R1 just turned on or activated EIGRP, and it sends an EIGRP Hello packet through all of its interfaces that are set up for EIGRP.
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