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Cisco CCNA Routing and Switching ICND2 200-101 Official Cert Guide by Wendell Odom

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Introduction to EIGRP

Historically speaking, the first IPv4 routing protocols used DV logic. RIP Version 1 (RIP-1) was the first popularly used IP routing protocol, with the Cisco-proprietary Interior Gateway Routing Protocol (IGRP) being introduced a little later, as shown in Figure 9-1.

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Figure 9-1 Timeline for IP IGPs

By the early 1990s, business and technical factors pushed the IPv4 world toward a second wave of better routing protocols. First, RIP-1 and IGRP had some technical limitations, even though they were great options for the technology levels of the 1980s. The bigger motivation for better routing protocols was the huge movement ...

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