Configuring Routers

I’ve got to program a router! What do I have to do

Router> Router>enable Router# Router#config t Config t is the place to be! Log on to the router

Name the router! Router(config)#hostname Lab-A Step One Lab-A

Password protect the Privilege Mode Step Two Lab-A(config)#enable secret class enable secret 5 $1$emBK$WxqLahy7YOAf0nifub Results in: PasswordCommands

Configure the Interfaces Step Three Lab-A(config)#interface serial0 Lab-A(config-if)# (Note prompt change)

Address the Interface(S0) Lab-A(config-if)#ip address Ip addressSubnet mask S0=

Clock ticks MUST be set between routers on the interface with the serial cable DCE end. Serial0 is where the DCE connects in our lab.

We use Serial0  Lab-A(config-if)#clock rate 56000

Address the next Interface (E0) Lab-A(config-if)#ip address Lab-A(config-if)#interface ethernet0 (This changes to program interface e0) S0= E0=

Control z Lab-A# Lab-A#show running-config

Like people, routers have to talk to one another!

Step Four Set up routing protocols

Routing Protocols: RIPRIPv2 IGRPEIGRP OSPF

Set up the routing protocol Lab-A(config)#router rip Lab-A(config-router)# version 2 Lab-A(config-router)#network Lab-A(config-router)#network (Note prompt change)

Note!  You have to configure for EACH network  (remember network # is the “wire” #)  Each network is on a separate line  Hit Control z to activate and return to:  Lab-A#

Control Access Control and secure access from: CONSOLE VTY (telnet) AUX (modem)

Control Access Step Five Lab-A(config)#line console 0 Lab-A(config-line)#password cisco (Note prompt change) Lab-A(config-line)#login

Continue Lab-A(config)#line vty 0 4 Lab-A(config-line)#password cisco Lab-A(config-line)#login

Want to save time and move fast between routers? Step Six

Create a host file Lab-A(config)#ip host Lab-A Lab-A(config)#ip host Lab-B Lab-A(config)#ip host Lab-C Lab-A(config)#ip host Lab-D Lab-A(config)#control z

Turn on the interfaces:  Lab-A(config)#interface s0  Lab-A(config-if)#no shutdown  Lab-A(config-if)#interface e0  Lab-A(config-if)#no shutdown Step Seven

Check and save your configuration (Step 8)  Router#show run (Check)  Router#copy run start (S ave)

Let’s Review:  Step 1 – name router  Hostname xxxxx  Step 2 – set “privilege” password and encode it  Enable secret xxxxx  Step 3 – configure interfaces  Interface sX (or eX)

 Step 4 – Set the routing protocols  Router rip  Step 5 – Set who and where access comes from  Line console (vty)  Step 6 – Create a host file  Ip host xxx.xxx.xxx yyy.yyy.yyy  Step 7 – Turn on interfaces  Router(config-if)#no shutdown Let us review

Step 8:Check and Save your work!  Check your config  Router#show run  Save your configuration from RAM to NVRAM  Router#copy run start

You’re Through!