Configuring Routers

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Configuring Routers
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Oh No! Ive got to program a router!
What do I have to do
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Log on to the router
Routergt Routergtenable Router Routerconfig t
Config t is the place to be!
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Name the router!
Step One
Router(config)hostname Lab-A
Lab-A
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Password protect the Privilege Mode
Step Two
Lab-A(config)enable secret class
Password
Commands
Results in
  enable secret 5 1emBKWxqLahy7YOAf0nifub.hU
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Configure the Interfaces
Step Three
Lab-A(config)interface serial0 Lab-A(config-if)
(Note prompt change)
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Address the Interface(S0)
Lab-A(config-if)ip address 201.100.11.1
255.255.255.0
Ip address
Subnet mask
S0
S0201.100.11.1
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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.
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We use Serial0

• Lab-A(config-if)clock rate 56000

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Address the next Interface (E0)
Lab-A(config-if)interface ethernet0
(This changes to program interface e0)
Lab-A(config-if)ip address 192.5.5.1
255.255.255.0
E0192.5.5.1
E0
S0
S0201.100.11.1
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Address the next Interface (e1)
Lab-A(config-if)interface ethernet1
(This changes to program interface e1)
Lab-A(config-if)ip address 205.7.5.1
255.255.255.0
E0192.5.5.1
S1No address
E0
E1
S0
S0201.100.11.1
E1205.7.5.1
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Control z
Lab-A Lab-Ashow running-config
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Results

• version 12.0
• service timestamps debug uptime
• service timestamps log uptime
• no service password-encryption
• service udp-small-servers
• service tcp-small-servers
• !
• hostname Lab-A
• !
• enable secret 5 1emBKWxqLahy7YOAf0nifub.hU.
• !
• ip subnet-zero

--More--
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interface Ethernet0 ip address 192.5.5.1
255.255.255.0 no ip directed-broadcast shutdown !
interface Ethernet1 ip address 205.7.5.1
255.255.255.0 no ip directed-broadcast shutdown
--More--
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interface Serial0 ip address 201.100.11.1
255.255.255.0 no ip directed-broadcast no ip
mroute-cache clockrate 56000 shutdown ! interface
Serial1 no ip address no ip directed-broadcast
shutdown
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Like people, routers have to talk to one another!
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Like people, routers have to talk to one another!
Step Four
Set up routing protocols
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Routing Protocols
RIP RIPv2 IGRP EIGRP OSPF
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Set up the routing protocol
Lab-A(config)router rip Lab-A(config-router)
version 2 Lab-A(config-router)network
192.5.5.0 Lab-A(config-router)network
207.7.5.0 Lab-A(config-router)network
201.100.11.0
(Note prompt change)
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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

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Lab-Ashow run
(router portion of show run)
! router rip version 2 network 192.5.5.0
network 201.100.11.0 network 205.7.5.0 !

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Control Access
Control and secure access from CONSOLE VTY
(telnet) AUX (modem)
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Control Access
Step Five
Lab-A(config)line console 0 Lab-A(config-line)pa
ssword cisco
(Note prompt change)
Lab-A(config-line)login
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Continue
Lab-A(config)line vty 0 4 Lab-A(config-line)pass
word cisco Lab-A(config-line)login
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Control Z(typing the word exit at the prompt
takes you up one level)
Lab-Ashow run will give the following
results line con 0 password cisco login
transport input none line aux 0 line vty 0 4
password cisco login
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Want to save time and move fast between routers?
Step Six
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A REAL time Saver!
Lab-A(config)ip host Lab-A 192.5.5.1 205.7.5.1
201.100.11.1 Lab-A(config)ip host Lab-B
219.17.100.1 199.6.13.1 201.100.11.2 Lab-A(config)
ip host Lab-C 223.8.151.1 204.204.7.1
199.6.13.2 Lab-A(config)ip host Lab-D
210.93.105.1 204.204.7.2 Lab-A(config)ip host
Lab-E 210.93.105.2 Lab-A(config)control z
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Turn on the interfaces
Step Seven

• Lab-A(config)interface s0
• Lab-A(config-if)no shutdown
• Lab-A(config-if)interface e0
• Lab-A(config-if)no shutdown
• Lab-A(config-if)interface e1
• Lab-A(config-if)no shutdown

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For Lab-A router, you are through!
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Program the other routers the same way, BUT

• Use the interfaces in use on each particular
  router
• Use the correct ip address/network address for
  each port on that router
• Check and save your configuration!
• Routershow run (Check)
• Routercopy run start (Save)

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Lets 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)

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• Step 4 Set the routing protocols
• Router rip
• Step 5 Set who and where access comes from
• Line console (vty)
• Step 6 Save Time
• Ip host xxx.xxx.xxx yyy.yyy.yyy
• Step 7 Turn on interfaces
• Router(config-if)no shutdown

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Check and Save your work!

• Check your config
• Routershow run
• Save your configuration from RAM to NVRAM
• Routercopy run start

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Youre Through!