CCNA – Don’t forget “ip routing”
Just a quick note here – if you are reading the Lammle book Chapter 7 on IP Routing, you have no doubt run into his lab with the Corp, R1, R2, and R3 routers. We did and diligently followed the static routing examples – and of course routing did not work.
Remember – add
ip routing to your configuration. Otherwise the
ping commands he has in his lab simply won’t work.
In a different article we’ll discuss how we got Damn Small Linux running on VMware Workstation, built our virtual networks, and connected everything to our routers. For now, let’s close with the
R3 router configuration from the lab.
! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R3 ! boot-start-marker boot-end-marker ! enable secret 5 $1$GwL5$AeV0B8XZbhog3bB9gsK9G1 ! no aaa new-model memory-size iomem 5 ! ! ip cef no ip domain lookup no ip dhcp use vrf connected ip dhcp excluded-address 172.16.10.1 172.16.10.10 ! ip dhcp pool Admin network 172.16.10.0 255.255.255.0 default-router 172.16.10.10 dns-server 172.16.10.2 ! ! ip auth-proxy max-nodata-conns 3 ip admission max-nodata-conns 3 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface FastEthernet0/0 description Connection to Corp Router ip address 10.1.5.2 255.255.255.0 duplex auto speed auto ! interface Ethernet1/0 description WLAN for Mobile User ip address 172.16.10.10 255.255.255.0 half-duplex ! interface Ethernet1/1 no ip address shutdown half-duplex ! interface Ethernet1/2 no ip address shutdown half-duplex ! interface Ethernet1/3 no ip address shutdown half-duplex ! ip http server no ip http secure-server ! ip forward-protocol nd ! ! ! ! ! control-plane ! ! ! ! mgcp behavior g729-variants static-pt ! ! ! ! ! banner motd ^C This is my R3 Router ^C ! line con 0 exec-timeout 0 0 password console logging synchronous login line aux 0 password aux login line vty 0 4 password telnet login line vty 5 871 password telnet login ! ! end