Configuracionde un router

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Chapter 5: Introduction to IP Routing

This chapter will discuss the IP routing process. This is an important subject to understand as it pertains to all routers and configurations that use IP.

IP routing is the process of moving packets from one network to another network and delivering the packets to hosts. This chapter will give you the background on how to configure and verify IProuting with Cisco routers

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It is important that you read chapter 5 of the Sybex CCNA Study Guide before you attempt the labs in this chapter.

The following labs are covered in this chapter:

* 5.1: Configuring the Routers
* 5.2: Verifying the Configurations
* 5.3: Configuring Static Routing
* 5.4: Verifying StaticRouting
* 5.5: Configuring and Verifying The Hosts
* 5.6: Configuring Default Routing
* 5.7: Verifying Default Routing
* 5.8: Configuring RIP Routing
* 5.9: Verifying RIP Routing
* 5.10: Configuring RIPv2
* 5.11: Verifying RIPv2
* 5.12: Configuring IGRP Routing
* 5.13: Verifying IGRP Routing
* 5.14: Configuring EIGRP Routing
* 5.15: VerifyingEIGRP Routing
* 5.16: Configuring single Area OSPF
* 5.17: Verifying Single Area OSPF


The following commands are used in this chapter:

Command | Meaning | Chapter |
show ip route | Displays the IP routing table | 5 |
ip route | Creates static and default routes on a router | 5 |
ip classless | Global configuration command used to tell a router to forwardpackets to a default route when the destination network is not in the routing table | 5 |
router RIP | Turns on IP RIP routing on a router | 5 |
network | Tells the routing protocol what network to advertise | 5 |
no ip route | Removes a static or default route | 5 |
router igrp as | Turns on IP IGRP routing on a router | 5 |
router eigrp as | Turns on IP EIGRP routing on arouter | 5 |
show protocols | Shows the routed protocols and network addresses configured on each interface | 5 |
show ip protocols | Shows the routing protocols and timers associated with each routing protocol configured on a router | 5 |
debug ip rip | Sends console messages displaying information about RIP packets being sent and received on a router interface | 5 |
debug ipigrp events | Provides a summary of the IGRP routing information running on the network | 5 |
debug ip igrp transactions | Shows message requests from neighbor routers asking for an update and the broadcasts sent from your router towards that neighbor router | 5 |
Version 2 | Enables rip version 2 | 5 |
No auto-summarization | Disable auto summarization | 5 |

This chapterwill provide configuration of all routers in the Standard Lab and then turn on IP routing using static, default and dynamic routing protocols. Switches will not be configured until chapter 6.

It is now time to use all the commands you learned in chapter 4 and apply them. Here is the configuration we will use (as documented on the Network Visualizer):

Router Interface IP Address
2600ASerial 0/0 172.16.20.2
2600A Fastethernet 0/0 172.16.40.1
2600B Serial 0/0 172.16.30.2
2600B Fastethernet 0/0 172.16.50.1
2600C Serial 0/0 172.16.20.1
2600C Fastethernet 0/0 172.16.10.1
2600C Serial 0/1 172.16.30.1

Host IP Address Default Gateway
HostA 172.16.10.4 172.16.10.1
HostB 172.16.10.5 172.16.10.1
HostC 172.16.10.6 172.16.10.1
HostD172.16.10.7 172.16.10.1
HostE 172.16.40.3 172.16.40.1
HostF 172.16.50.3 172.16.50.1

Lab 5.1: Configuring the Routers
This first lab will have you connect to the routers starting at 2600A and working through 2600E and then finishing with 2600A. After the configurations are complete, we will then build the routing tables.

1. Connect to the 2600A router and set the hostname,...
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