book ccna routing and switching exam

book ccna routing and switching exam.Figure 10.2 Topic roadmap (left) and authentication commands (right)2.2 Basic Content 205Tip: All of the output listed in the following verification examples is selected from the router in Figure 10-1. In this figure, routers R1 and R2 use EIGRP configuration example 10-1, and R3 uses configuration example 10-2. Also note that all routers use Gigabit LAN interfaces, but the fact that they operate at 100Mbit/s because they are connected to a switch affects the metric slightly.Finding an EIGRP-enabled InterfaceFirst, each router must have EIGRP enabled on the correct interface.Example 10-3 connects the configuration to an EIGRP-enabled router interface to begin the verification process.IOS provides us with three ways to find the list of interfaces.Use showrunning-config to view the EIGRP and interface configurations and apply the same logic as EIGRP to find the list of interfaces on which EIGRP should be enabled.Use show ip protocols to list an abbreviated version of the EIGRP configuration, again applying the same logic as EIGRP and predicting the list of interfaces. Use show ip eigrp interfaces to list the interfaces on which the router has actually enabled EIGRP. Of these three options, only the show ip eiglp interfaces command provides us with the actual list of interfaces actually selected by the router. The other two methods provide us with the configuration and let us make a reasonable guess. (Both are important!) The show ip eigrp interfaces command gives a direct and short list of EIGRP-enabled interfaces, one line per interface. On the other hand, theThe show ip eigrp interfaces detail command lists more detailed information about each interface, including Hello Interval and Hold Interval, and whether horizontal segmentation is enabled. Example 10-3 is an example of running these two commands on router R1.Example 10-3 Finding Which Interfaces Are EIGRP Enabled on R1Rl# show ip EIGRP-IPv4 eigrp interfaces Interfaces for AS(1)