Router configuration in packet tracer

Router Configuration in
Packet Tracer
1
router configuration 12/14/2014

Packet Tracer
• Packet Tracer is a program used to illustrate at a
basic level how networks work
• At startup, you are in the Logical Workspace in
Realtime Mode
• You can build your network and see it run in real
time in this configuration
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Organization of Packet Tracer
• Packet Tracer has two different views
• Logical Workspace
• Physical Workspace
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Router
•Router is a device which makes connection possible
between two or more different networks present at same
or different geographical locations.
•It works on 3rd layer of OSI Model(i.e on network layer)
•It does two basic things:.
1. Select the best path from the routing table.
2. Forward the packet on that path.
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Router pictures
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Vendors of Router
Many companies are manufacturing routers
• Cisco
• Nortel
• Multicom
• Juniper
• Dlink
• 3com
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Cont…
• Cisco is the leading manufacturer of routers and
switches .
• It manufactures 70% of routers and switches of the
market.
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Ports on Router
There are three types of ports on the router.
1. LAN ports
2. WAN ports
3. Administrative Ports
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Modes of the Router
• Here are different modes of the router
• Setup Mode
• User Mode
• Privileged Mode
• Global Configuration Mode
• Interface Mode
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Cont….
Setup Mode
• The router enters in to the setup mode if the NVRAM is empty.
Continue with configuration dialog[yes/no]
Answer with ‘Yes’ or ‘No’.
User Mode
• Only some basic monitoring
• Limited show commands ping, trace,
• Router>
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Cont…
Privileged Mode
• Monitoring and some troubleshooting.
• All show commands, ping trace, copy and erase
• Router#
Global Configuration Mode
• To make any change that affect the router like
hostname, routing configuration.
• Router(config)#
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Cont…
• Global Configuration Mode
• Configurations done on the specific interface.
• Router(config-if)#
• Rommon Mode
• Reverting Password
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Basic Commands
• Setup Mode
• Continue with configuration dialog?[Yes/No]
• Answer ‘Yes’ or ‘No’.
• User Mode
• Router>
• Router>enable
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Privileged Mode
• Router#Show running-config
• Router#Show start-config
• Router#Show flash
• Router#Show version
• Router#Show ip interface brief
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Global Configuration Mode
• Router#Configure Terminal
• Router(config)#Hostname R-1
• R-1(config)#Show IP route
• R-1(config)enable password<password>
• R-1(config)enable secret <password>
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Interface Mode
• Router(config)# interface FastEthernet0/0
• Router(config-if)#ip address <ip address> <Subnet
Mask>
• Rouetr(config)#interface Serial 0/0
• Router(config-if)ip address <ip address> <Subnet
Mask>
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Routing
• Forwarding the packets from one network to the
other network choosing the best path from the
routing table.
• Routing makes possible for two or more networks
to communicate with each other
• Routing table only consist of only the best routes
for each destination
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Types of routing
1. Static routing
2. Dynamic routing
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Static Routing
• It is configured manually by the administrator.
• Mandatory need for the destination network ID
• Used for small organizations
• In static routing the administrator decide the best path
• Administrator should know that what is the destination
ID and how many routes to reach that destination
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Advantages
• There is no overhead on the router CPU.
• There is no bandwidth usage between the routers
• It adds security because the administrator can choose to
allow routing access to the certain networks only
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Disadvantages
• Used for small network(its not feasible in large
networks)
• Each and every network have to manually configured.
• Any change in the network has to be update in all
routers.
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Configuring the Static Routing
• Router(config)#ip route <Destination Network ID>
• <Destination Subnet Mask>
• <Next Hop IP address>.
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Example:
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Code of example:
• For PC1:
• IP address 10.0.0.2 Subnet mask 255.0.0.0 Default Gateway
10.0.0.1
• For PC2 :
•
• IP address 30.0.0.2 Subnet mask 255.0.0.0 Default Gateway
30.0.0.1
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Cli code:
Continue with configuration dialog? [yes/no]: no
Press RETURN to get started!
Router>
Set Hostname to R1 and assign 10.0.0.1 255.0.0.0 ip address to fast Ethernet 0/0.
also set a message “ Unauthorized access is prohibited”.
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R1
R1(config)#banner motd # Unauthorized access is prohibited #
R1(config)#interface fastethernet 0/0
R1(config-if)#ip address 10.0.0.1 255.0.0.0
R1(config-if)#no shutdown
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
R1(config-if)#exit
R1(config)#
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configure serial port
When Serial connections are configured they need one more command that normal
Ethernet connections do not. That command is theclock rate command.
Establish a simple serial to serial connection between R1 Serial 0/0/0 and R2 Serial
0/0/0.
Now configure serial port on both router with ip address 20.0.0.1 255.0.0.0 on one and
20.0.0.2 255.0.0.0 on two.
On R1:
R1(config)#interface serial 0/0/0
R1(config-if)#clock rate 64000
R1(config-if)#bandwidth 64
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up
R1(config-if)#exit
R1(config)#
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First tell R1 about to network of 30.0.0.0
R1(config)#ip route 30.0.0.0 255.0.0.0 20.0.0.2
R1(config)#
In this command 30.0.0.0 is the destination network and 255.0.0.0 is the
subnetmask on destination network and 20.0.0.2 is the ip address of next
hope
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Configure Router-2 :hostname R2 and 30.0.0.1 255.0.0.0 ip address on
fast Ethernet 0/0.
Router>enable
Router# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R2
R2(config)#interface fastEthernet 0/0
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0,
changed state to up
R2(config-if)#exit
R2(config)#
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Configure serial port
On R2
R2(config)#interface serial 0/0
R2(config-if)#exit
Say this way "To get to the destination network of 30.0.0.0, with a subnet
mask of 255.0.0.0, send all packets to 20.0.0.2"
Now tell R2 about to network of 10.0.0.0
R2(config)#ip route 10.0.0.0 255.0.0.0 20.0.0.1
R2(config)#
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Router configuration in packet tracer

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