Advanced configuration options for EIGRP, including route summarization, passive interfaces, and default network origination are described. Also provided is insight into EIGRP deployment over various WAN technologies and EIGRP load balancing, as well as limitations of EIGRP bandwidth utilization on WAN links. In routing environments, Enhanced Interior Gateway Routing Protocol (EIGRP) offers benefits and features over historical distance-vector routing protocols such as Routing Information Protocol version 1 (RIPv1). These benefits include rapid convergence, lower bandwidth utilization, and multiple routed protocol support besides IP. As an administrator, understanding the EIGRP commands used to configure a router is essential, especially during initial configuration or routing protocol migration. EIGRP can also operate over various underlying network technologies Ethernet over Multiprotocol Label Switching (EoMPLS), MPLS virtual private network (MPLS VPN), and physical Frame Relay, as well as multipoint and point-to-point Frame Relay subinterfaces. Load balancing across multiple links is a valuable option for efficient bandwidth utilization. This course reviews the benefits of EIGRP and discusses the key capabilities that distinguish EIGRP from other routing protocols. The implementation plan is covered as the first step in configuring EIGRP, followed by basic EIGRP configuration. To assist in verification, this course introduces various Cisco IOS software show commands and defines the key fields in each.
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