Lab23 (1130264)

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Лабораторная работа № 23. Конфигурирование протокола маршрутизации "IGRP"

Objectives:

• To learn how to configure IGRP as the network's routing protocol

• Adjust configurable IGRP metrics

Perform the following steps using one of the 5 lab routers. The router prompt shown here is the default prompt of "Router" assuming no host name has been assigned to the router. The actual prompt will vary (eg: LAB-A or LAB-B etc.)

Step 1 - Enter the user exec mode.

Step 2 - Ping all IP interfaces on your router and all interfaces on the directly connected neighboring routers.

Document in your Lab Engineering Journal what the responses were from ICMP Ping command.
Which router interfaces respond with a successful ping?

Step 3 - Display the current routing protocols in use with the following command:

Router>show ip protocols
Are there any routing protocols defined?

(If there are they should be removed and then repeat steps 1 and 2 - refer to lab 5.4.3 for removal)

Step 4 - Enter privileged exec mode with the class password using the following command:

Router>enable
Password: class

Step 5 - Display the current running configuration in RAM with the following command:

Router#show running-config
Are static routes defined?

(If there are they should be removed - refer to lab 5.4.3)

Step 6 - Enter configure mode with the following command:

Router#config term

Step 7 - Enable IGRP on this router with the following command:

Router(config)#router igrp 100
What changed on the router prompt:

Step 8. - Define which networks are to use IGRP by entering the following command:

Router(config-router)#network xxx.xxx.xxx.xxx
(Where xxx.xxx.xxx.xxx is the IP address of one of the networks directly connected to the router.)

1. What was the router response?

Step 9 - Repeat step 8 for all of the networks directly connected to the router.

Step 10 - Enter Exit.

Step 11 - Enter CNTL-Z.

Step 12 - Display the current router configuration file in RAM with the following command:

Router#show running-config
Is the router IGRP protocol turned on and advertising the networks you defined?

Step 13 - Enter the following command at the privileged mode prompt:

Router#copy run start
What does this command do?

Step 14 - Display the current routing protocols in use with the following command:

Router#show ip protocols
Enter in your Lab Engineering Journal any important information you have received from issuing this command. What routing protocol was shown?

Step 15 - Display the IP routing table to show what networks are known to this router.

Router#show ip route
Enter in your Lab Engineering Journal any important information you have received from issuing this command. What networks were listed?

Step 16 - Display the router interfaces and their statistics.

Router#show ip interface
Enter in your Lab Engineering Journal any important information you have received from issuing this command. What interfaces are in use?

Step 17 - Enable IGRP debugging with the following command:

Router#debug ip igrp transactions
Enter in your Lab Engineering Journal any important information you have received from issuing this command. What was the effect of this command?

Step 18 - Check the current default basic settings for the timers with the following command:

Router#show ip protocol

What is the current setting for the four basic timers?

Update:

Invalid:

Hold Down:

Flushed:

Step 19 - Reset the IGRP network timers with the following series of commands:

Router#config term
Router(config)#router igrp 100
Router(config-router)#no timers basic
What is the purpose of this command?

Step 20 - Check to see that the router is no longer receiving routes with the following command:

Router#show ip route

Step 21 - Adjust the network timers using the following command.

All devices in an IGRP autonomous system must be consistent in their use of timers. Consistency is important with regard to how often they send updates and the length of the hold down. Use the following series of commands to adjust the timers to different settings than the default ones in step 18:

Router#config term
Router(config)#router igrp 100
Router(config-router)#timers basic update invalid holddown flush [sleeptime] (replace each of the italicized words with a number in seconds)

Enter in your Lab Engineering Journal any important information you have received from issuing this command and the significance of issuing this command.

Step 22 - Enforce a maximum network diameter of 2 hops with the following series of commands:

Router#config term
Router(config)#router igrp 100
Router(config-router)#metric maximum-hops 2

Step 23 - Turn off IP protocol debugging with the following command:

Router#no debug ip igrp transactions
Enter in your Lab Engineering Journal any important information you have received from issuing this command.

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