TAILIEUCHUNG - CCNA 1 and 2 Companion Guide, Revised (Cisco Networking Academy Program) part 79

Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, Revised part 79 is the Cisco approved textbook to use alongside version of the Cisco Networking Academy Program CCNA 1 and CCNA 2 web-based courses. The topics covered provide you with the necessary knowledge to begin your preparation for the CCNA certification exam (640-801, or 640-821 and 640-811) and to enter the field of network administration. | Page 749 Tuesday May 27 2003 2 16 PM IGRP 749 The autonomous system number is one that identifies the IGRP process. It is also used to tag the routing information. To specify a list of networks for IGRP routing processes use the network router configuration command RouterA config router igrp 101 RouterA config-router network To remove an entry use the no form of the command RouterA config no router igrp 101 RouterA config-router no network Example 16-13 demonstrates how to configure IGRP using AS 101 on RouterA and RouterB. Example 16-13 Configuring IGRP RouterA config router igrp 101 RouterA config-router network RouterA config-router network RouterB config router igrp 101 RouterB config-router network RouterB config-router network Lab Activity Configuring IGRP In this lab you set up an IP addressing scheme using Class C networks and configure IGRP on all routers. Verifying the IGRP Configuration To verify that IGRP has been configured properly enter the show ip route command and look for IGRP routes signified by an I. Additional commands for checking IGRP configuration are as follows show interface interface Verifies that the Ethernet interface is properly configured. show running-config Verifies that IGRP is enabled on the router. show running-config interface interface Verifies that the proper IP address has been used. show running-config I begin interface interface Verifies that IGRP is running on the router s interfaces starting at a specific interface. Page 750 Tuesday May 27 2003 2 16 PM 750 Chapter 16 Distance Vector Routing Protocols show running-config I begin igrp Verifies that IGRP is enabled on the router. show ip protocols Verifies that IGRP is enabled on the router. To verify that the Ethernet interface is properly configured enter the show interface fa0 0 command. Example 16-14 illustrates the output. Example 16-14 show interface Command Output RouterA .

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