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ca like courses.P10.1.1.0/24, 1successors, FD is 28160via Connected, GigabitEthernet0/0 P 10.1.8.0/24, 1 successors, FD is 2681856First, look carefully at the full output and count the number of subnets (the rows aligned with the left edge of the example). Notice that R1 lists a set of messages for all 9 subnets, including the subnets connected to R1. EIGRP keeps topology information about all of its subnets, even if the subnets are connected.Next, focus on the first row of entries shown in the shaded section, which is for subnet 10.1.3.0/24, the subnet connected from R3's LAN interface. The first line of a given subnet lists the subnet ID and mask. It also lists the number of successor routes and the feasible distance (FD). (As a reminder, the FD is the metric of the successor route, which is the best route to reach a particular subnet.)To ensure that the items are clear, Figure 10-4 splits them up, using the same details about subnet 10.1.3.0/24 from R1's EIGRP topology table. Continuing to focus on subnet 10.1.3.0/24±, the output lists each destination subnet as a row, and then lists each route below it as a row that is indented and begins with the word via. In Figure 10-4, the main line (as usual) lists the subnets, the number of prefix successorsmasks, the number of successor routes, and the FD.The second (indented) row contains routing information, including the next-hop router (after the word via) and thesubnet/mask feasible distance (FD) outgoing interface. If the router puts this particular route into the IP routing table, the IP route uses the next-hop IP address and the local outgoing interface that are in this route. Note that if EIGRP has multiple possible routes to this subnet, EIGRP can list multiple rows that start with via. P 10.1.3.0/24, 1 successors, FD is2172416via 10.1.4.3 (2172416/28160), Serial0/0/lMetric outgoing interface next-hop router reported distance (RD)Figure 10-4 Reference fields in show ipeigrp topology output