Lab 07 : Configure Static Route in GNS3

Yaser Rahmati | یاسر رحمتی

• Static route tells the device exactly where to send traffic, no matter what.

• Static route is often used when your network has only a few routers or there is only one route from a source to a destination.

Syntax of static route

ip route destination-network-address subnet-mask {next-hop-IP-address | exit-interface}

1. destination-network-address: destination network address of the remote network

2. subnet mask: subnet mask of the destination network

3. next-hop-IP-address: the IP address of the receiving interface on the next-hop router

4. exit-interface: the local interface of this router where the packets will go out

1. Scenario

• Suppose that your company has 2 branches located in Tehran and Shiraz.

• As the administrator of the network, you are tasked to connect them so that employees in the two LANs can communicate with each other.

• After careful consideration you decided to connect them via static route.

2. Physical Topology

3. Configuring interfaces on R1

R1#configure terminal
R1(config)#interface fastEthernet 0/0
R1(config-if)#ip address 192.168.1.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#exit
R1(config)#interface serial 1/0
R1(config-if)#ip address 10.0.0.1 255.255.255.252
R1(config-if)#no shut
R1(config-if)#clock rate 64000

4. Configuring interfaces on R2

R2#configure terminal
R2(config)#interface serial 1/0
R2(config-if)#ip address 10.0.0.2 255.255.255.252
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#interface fastEthernet 0/0
R2(config-if)#ip address 172.16.0.1 255.255.0.0
R2(config-if)#no shut
R2(config-if)#exit

5. show ip route command

R1#show ip route

      10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        10.0.0.0/30 is directly connected, Serial1/0
L        10.0.0.1/32 is directly connected, Serial1/0
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/24 is directly connected, FastEthernet0/0
L        192.168.1.1/32 is directly connected, FastEthernet0/0
R1#

R2#show ip route

      10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        10.0.0.0/30 is directly connected, Serial1/0
L        10.0.0.2/32 is directly connected, Serial1/0
      172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C        172.16.0.0/16 is directly connected, FastEthernet0/0
L        172.16.0.1/32 is directly connected, FastEthernet0/0
R2#

6. Configuring static route on R1

R1(config)#ip route 172.16.0.0 255.255.0.0 10.0.0.2
R1(config)#exit
R1#show ip route

      10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        10.0.0.0/30 is directly connected, Serial1/0
L        10.0.0.1/32 is directly connected, Serial1/0
S     172.16.0.0/16 [1/0] via 10.0.0.2
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/24 is directly connected, FastEthernet0/0
L        192.168.1.1/32 is directly connected, FastEthernet0/0
R1#

7. Configuring static route on R2

R2(config)#ip route 192.168.1.0 255.255.255.0 10.0.0.1
R2(config)#exit
R2#show ip route

      10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        10.0.0.0/30 is directly connected, Serial1/0
L        10.0.0.2/32 is directly connected, Serial1/0
      172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
C        172.16.0.0/16 is directly connected, FastEthernet0/0
L        172.16.0.1/32 is directly connected, FastEthernet0/0
S     192.168.1.0/24 [1/0] via 10.0.0.1
R2#

8. Manually set an IP on PC1

PC1> ip 192.168.1.100 255.255.255.0 192.168.1.1
Checking for duplicate address...
PC1 : 192.168.1.100 255.255.255.0 gateway 192.168.1.1

PC1>

9. Manually set an IP on PC2

PC2> ip 172.16.0.100 255.255.0.0 172.16.0.1
Checking for duplicate address...
PC1 : 172.16.0.100 255.255.0.0 gateway 172.16.0.1

PC2>

10. Try to ping each far end network

PC2> ping 192.168.1.100
84 bytes from 192.168.1.100 icmp_seq=1 ttl=62 time=34.043 ms
84 bytes from 192.168.1.100 icmp_seq=2 ttl=62 time=42.031 ms
84 bytes from 192.168.1.100 icmp_seq=3 ttl=62 time=31.992 ms
84 bytes from 192.168.1.100 icmp_seq=4 ttl=62 time=38.026 ms
84 bytes from 192.168.1.100 icmp_seq=5 ttl=62 time=38.034 ms

PC2>