EIGRP: Enhanced Interior Gateway Routing Protocol
As the name suggests, it is an enhanced version of the earlier IGRP, with some extensions. The principles are similar and the differences are not significant, so we will cover EIGRP here and skip IGRP, as you are unlikely to use IGRP in the future. However, EIGRP is a Cisco-proprietary routing protocol, which actually limits its scope of use, because it is typically only deployed when all devices in the network are Cisco products. You must also consider the network’s future scalability. What if you need to use products from other vendors later? Therefore, you must carefully decide whether to use EIGRP. Let’s take some time to review the key points of EIGRP, starting with its characteristics:
EIGRP Characteristics:
EIGRP was supported as early as IOS 9.21; the current IOS version has reached 12.4. You can find the relevant IOS files from the official website:
