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How To Configure Default Route | Computer Network

To configure default route using cisco packet tracer simulation tool.

Step 1: Start – All Programs – cisco packet tracer – cisco packet tracer 5.3.

Step 2: Add the network device such as PC, switch and router in work area.

Step 3: Connect PC to switch using Copper media Straight through Cable in Fast Ethernet port and use serial cable for router to router connection.

Step 4: Apply the IP address and proper subnet mask.

Step 5: Configure default route use the following syntax

ip route [destination network address] [mask] [next hop address or interfacename]

Step 6: After complete configuration send the packet (Add Simple PDU) one network to another network.

Step 7: Check the data flow to the network use real time mode (or) Simulation Mode.

Step 8: Now default route was woking well. Check the route use the command.

R1#show ip route

Block Diagram

Default Route Configuration

Device Configuration

DEVICEINTERFACEIP ADDRESSSUBNET MASKGATEWAY
PC1Fast Ethernet192.168.1.1255.255.255.0192.168.1.10
PC2Fast Ethernet192.168.1.2255.255.255.0192.168.1.10
PC3Fast Ethernet192.168.2.1255.255.255.0192.168.2.10
PC4Fast Ethernet192.168.3.1255.255.255.0192.168.3.10
PC5Fast Ethernet192.168.4.1255.255.255.0192.168.4.10
PC6Fast Ethernet192.168.4.2255.255.255.0192.168.4.10
R1Fast Ethernet0/0192.168.1.10255.255.255.0N/A
Fast Ethernet1/0192.168.2.10255.255.255.0N/A
Serial 2/011.1.1.1255.255.255.252N/A
R2Serial 2/011.1.1.2255.255.255.252N/A
Serial 3/011.1.1.5255.255.255.252N/A
R3Fast Ethernet0/0192.168.3.10255.255.255.0N/A
Fast Ethernet1/0192.168.4.10255.255.255.0N/A
Serial 3/011.1.1.6255.255.255.252N/A

R1 Configuration

Router>enable
Router# configure terminal

Device Name and Particular interface Configuration

Router(config)#hostname R1

R1(config)#interface FastEthernet0/0
R1(config-if)#no shutdown
R1(config-if)#ip address 192.168.1.10 255.255.255.0
R1(config-if)#exit

R1(config)#interface FastEthernet1/0
R1(config-if)#no shutdown
R1(config-if)#ip address 192.168.2.10 255.255.255.0
R1(config-if)#exit

R1(config)#interface Serial2/0
R1(config-if)#no shutdown
R1(config-if)#clock rate 72000
R1(config-if)#ip address 11.1.1.1 255.255.255.252
R1(config-if)#

Default Route Configuration Command

R1(config)#ip route 0.0.0.0  0.0.0.0  serial 2/0
R1(config)#end

Save the running Configuration file to NVRAM

R1#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
R1#

Verify the Default Route on the Routing Table

R1#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
* - candidate default, U - per-user static route, o - ODR

Gateway of last resort is 0.0.0.0 to network 0.0.0.0
     11.0.0.0/30 is subnetted, 1 subnets
C       11.1.1.0 is directly connected, Serial2/0
C    192.168.1.0/24 is directly connected, FastEthernet0/0
C    192.168.2.0/24 is directly connected, FastEthernet1/0
S*   0.0.0.0/0 is directly connected, Serial2/0

R2 Configuration

Router>enable
Router#configure terminal

Device Name and Particular interface Configuration

Router(config)#hostname R2

R2(config)#interface Serial2/0
R2(config-if)#no shutdown
R2(config-if)#no clock rate

This command applies only to DCE interfaces

R2(config-if)#ip address 11.1.1.2 255.255.255.252
R2(config-if)#exit

R2(config)#interface Serial3/0
R2(config-if)#no shutdown
R2(config-if)#clock rate 72000
R2(config-if)#ip address 11.1.1.5 255.255.255.252
R2(config-if)#exit

Default Route Configuration Command

R2(config)#ip route 0.0.0.0 0.0.0.0 serial 3/0
R2(config)#ip route 0.0.0.0 0.0.0.0 serial 2/0
R2(config)#end

Save the running Configuration file to NVRAM

R2#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]

Verify the Default Route on the Routing Table

R2#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is 0.0.0.0 to network 0.0.0.0

     11.0.0.0/30 is subnetted, 2 subnets
C       11.1.1.0 is directly connected, Serial2/0
C       11.1.1.4 is directly connected, Serial3/0
S*   0.0.0.0/0 is directly connected, Serial3/0
is directly connected, Serial2/0
R2#

R3 Configuration

Router>enable
Router#configure terminal

Device Name and Particular interface Configuration

Router(config)#hostname R3
R3(config)#interface FastEthernet0/0
R3(config-if)#no shutdown
R3(config-if)#ip address 192.168.3.10 255.255.255.0
R3(config-if)#exit

R3(config)#interface FastEthernet1/0
R3(config-if)#no shutdown
R3(config-if)#ip address 192.168.4.10 255.255.255.0
R3(config-if)#exit
R3(config)#interface Serial3/0
R3(config-if)#no shutdown
R3(config-if)#no clock rate

This command applies only to DCE interfaces

R3(config-if)#ip address 11.1.1.6 255.255.255.252
R3(config-if)#exit

Default Route Configuration Command

R3(config)#ip route 0.0.0.0 0.0.0.0 11.1.1.5
R3(config)#end

Save the running Configuration file to NVRAM

R3#copy running-config startup-config
Destination filename [startup-config]?
Building configuration...
[OK]
R3#

Verify the Default Route on the Routing Table

R3#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is 11.1.1.5 to network 0.0.0.0

     11.0.0.0/30 is subnetted, 1 subnets
C       11.1.1.4 is directly connected, Serial3/0
C    192.168.3.0/24 is directly connected, FastEthernet0/0
C    192.168.4.0/24 is directly connected, FastEthernet1/0
S*   0.0.0.0/0 [1/0] via 11.1.1.5
R3#

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