The following scenario and questions are designed to draw together the content of the chapter and to exercise your understanding of the concepts. There is not necessarily a right answer. The thought process and practice in manipulating the concepts is the goal of this section. The answers to the scenario questions are found at the end of this chapter.
Scenario 1-1 provides you with the data produced with the Cisco router IOS command show ip route . A legend defining the fields of the sample output is also provided to assist in answering the questions for Scenario 1-1.
Example 1-2 contains sample output from the show ip route command.
Example 1-2. The show ip route Command Output
Router# show ip route Codes: I - IGRP derived, R - RIP derived, H - Hello derived, O - OSPF derived C - connected, S - static, E - EGP derived, B - BGP derived * - candidate default route, IA - OSPF inter area route E1 - OSPF external type 1 route, E2 - OSPF external type 2 route Gateway of last resort is 188.8.131.52 to network 184.108.40.206 O E2 220.127.116.11 [160/5] via 18.104.22.168, 0:01:00, Ethernet2 E 22.214.171.124 [200/128] via 126.96.36.199, 0:02:22, Ethernet2 O E2 188.8.131.52 [160/5] via 184.108.40.206, 0:00:59, Ethernet2 O E2 220.127.116.11 [160/5] via 18.104.22.168, 0:00:59, Ethernet2 E 22.214.171.124 [200/128] via 126.96.36.199, 0:02:22, Ethernet2 E 188.8.131.52 [200/129] via 184.108.40.206, 0:02:22, Ethernet2 E 220.127.116.11 [200/128] via 18.104.22.168, 0:02:22, Ethernet2 E 22.214.171.124 [200/128] via 126.96.36.199, 0:02:22, Ethernet2 E 188.8.131.52 [200/129] via 184.108.40.206, 0:02:23, Ethernet2
The following information defines the fields reported in the show ip route command:
The first column lists the protocol that derived the route.
The second column might list certain protocol-specific information as defined in the display header.
The third column lists the address of the remote network. The first number in the brackets is the administrative distance of the information source; the second number is the metric for the route.
The fourth column specifies the address of the router that can build a route to the specified remote network.
The fifth column specifies the last time that the route was updated, in hours:minutes:seconds.
The final column specifies the interface through which the specified network can be reached.
Answer the following questions by using the output from the preceding show ip route command.
| 1: || |
What routing protocol derived the route 220.127.116.11?
| 2: || |
What router interface IP address is used to reach IP network 18.104.22.168?
| 3: || |
When was the last time that the route 22.214.171.124 was updated?
| 4: || |
Through which router interface can the IP network 126.96.36.199 be reached?