GNS3 Labs - Default route

How Default Route Works

This is a simple tutorial for configuring defaut route to connect R1,R2,R3&R4 using GNS3. Below is the simple lab using GNS3

Basic Topology

R1 Configuraion:

interface FastEthernet0/0 

ip address 10.0.0.1 255.255.255.252

exit

interface FastEthernet0/1

ip address 10.0.0.14 255.255.255.252

exit

R2 Configuraion:

interface FastEthernet0/0 

ip address 10.0.0.2 255.255.255.252

exit

interface FastEthernet0/1

ip address 10.0.0.5 255.255.255.252

exit

R3 Configuraion:

interface FastEthernet0/0 

ip address 10.0.0.10 255.255.255.252

exit

interface FastEthernet0/1

ip address 10.0.0.13 255.255.255.252

exit

R4 Configuraion:

interface FastEthernet0/0 

ip address 10.0.0.6 255.255.255.252

exit

interface FastEthernet0/1

ip address 10.0.0.9 255.255.255.252

exit

From R1 Able to Ping R3 Fa0/0 and R2 Fa0/1 but not able to reach other interfaces on the R2,R3 & R4 

R1#ping 10.0.0.13

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.0.0.13, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 116/283/608 ms

R1#ping 10.0.0.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 204/379/512 ms


R1#ping 10.0.0.5

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.5, timeout is 2 seconds:
.....

Now will introduce Default route in R1,R2,R3 & R4  to reach other networks 

Success rate is 0 percent (0/5)

R1 Configuration

ip route 0.0.0.0 0.0.0.0 10.0.0.2
ip route 0.0.0.0 0.0.0.0 10.0.0.13

R2 Configuration

ip route 0.0.0.0 0.0.0.0 10.0.0.6
ip route 0.0.0.0 0.0.0.0 10.0.0.1

R3 Configuration

ip route 0.0.0.0 0.0.0.0 10.0.0.14
ip route 0.0.0.0 0.0.0.0 10.0.0.9


R4 Configuration

ip route 0.0.0.0 0.0.0.0 10.0.0.5
ip route 0.0.0.0 0.0.0.0 10.0.0.10


Now Ping from R1 to all indirectly connected networks 

R1#ping 10.0.0.10

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.10, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 212/309/404 ms
R1#ping 10.0.0.6

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.6, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 552/680/808 ms
R1#ping 10.0.0.9

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.9, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 792/892/1024 ms
R1#ping 10.0.0.5

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.5, timeout is 2 seconds:
!!!!!


Success rate is 100 percent (5/5), round-trip min/avg/max = 212/334/524 ms