capitulo 8 ccna 1

capitulo 8 ccna 1.The Show ip protocols command is particularly interesting in the portions of the output that are grayed out on each router. The contents of these shaded sections show the parameters for configuring the network command. For each network command, the show ip protocols command is shown in the MRouting for228 Chapter 11 Troubleshooting IPv4 Routing ProtocolsEach line lists the contents of the various network commands. Example The output of ll-l illustrates that Rl uses network10.0.0.0 configuration command (as shown at the beginning of the example), while "10 0.0/16" for R2 in the example indicates that R2 is using the network10.1.0.00.0.255.255 command. EIGRP Interface Inspection IssuesThe next few pages describe the problems caused by the configuration on routers R3 and R4.Example 11-2 ends with a short insight into the current problem caused by R3. The showipprotocols command on R2 lists two sources of routing information at the end: lO.Ll.l (Rl) and 10.1.1.3 (R3). However, R2 is only informed of one EIGRP route (iO.l.ll.O/24), which is shown in the output of the showiprouteeigrp command. Under normal operation, R2 should be informed of three EIGRP routes-each to each of the external LAN subnets shown in Figure 11-3.Example H-3 shows the root cause on R3. First, R3's show ip eigrp interfaces command lists G0/0 and no GO/l, making it likely that the problem already exists because of the configuration of EIGRP on GO/l. The root cause of the problem is listed at the top of the example: an incorrect network command that does not enable EIGRP on the G0/1 interface on R3.Example 11-3 EIGRP Problem on R3R3# show running-config I lines omittedfor brevity router eigrp 99network 10.1.1.30.0.0.0 network 10.1.13.30.0.0.0 auto-summary