Start by placing 4 2911 Routers in a square configuration with each connected to 2 other routers. Attach a 2960 Switch to each of the routers. Attach a single PC to each of the switches.
| Network | IP Network | Router IP | PC IP |
|---|---|---|---|
| 0 | 192.168.0.0/24 | 192.168.0.1 | 192.168.0.100 |
| 1 | 192.168.1.0/24 | 192.168.1.1 | 192.168.1.100 |
| 2 | 192.168.2.0/24 | 192.168.2.1 | 192.168.2.100 |
| 3 | 192.168.3.0/24 | 192.168.3.1 | 192.168.3.100 |
Configuring the Routers
Internal Network
Repeat the steps for each of the 4 networks, replacing the X with the network number.
Router>enable
Router#configure terminal
Router(config)#interface gigabitEthernet 0/2
Router(config-if)#ip address 192.168.X.1 255.255.255.0
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#ip dhcp excluded-address 192.168.X.1 192.168.X.99
Router(config)#ip dhcp pool NETWORK_X
Router(dhcp-config)#network 192.168.X.0 255.255.255.0
Router(dhcp-config)#default-router 192.168.X.1
Routing Configuration
| Link X -> Y | X IP Address | Y IP Address |
|---|---|---|
| Router 0 -> Router 1 | 10.0.0.1 | 10.0.0.2 |
| Router 1 -> Router 2 | 10.0.0.5 | 10.0.0.6 |
| Router 2 -> Router 3 | 10.0.0.9 | 10.0.0.10 |
| Router 3 -> Router 0 | 10.0.0.13 | 10.0.0.14 |
Repeat these steps for each of the 4 Routers. The interfaces and addresses will need to match that of your topology.
Router>enable
Router#configure terminal
Router(config)#interface gigabitEthernet 0/0
Router(config-if)#ip address 10.0.0.X 255.255.255.252
Router(config-if)#no shutdown
Router(config-if)#interface gigabitEthernet 0/1
Router(config-if)#ip address 10.0.0.Y 255.255.255.252
Router(config-if)#no shutdown
Here X and Y are the immediate neighbours of the router beinng configured. With Z being the router that is not directly attacker to the router being configured. The last ip route has a higher “administrative distance” than the other 3 routes, this route will act as a fail over should that link fail.
Router>enable
Router#configure terminal
Router(config)#ip route 192.168.X.0 255.255.255.0 10.0.0.X 50
Router(config)#ip route 192.168.Y.0 255.255.255.0 10.0.0.Y 50
Router(config)#ip route 192.168.Z.0 255.255.255.0 10.0.0.X 50
Router(config)#ip route 192.168.Z.0 255.255.255.0 10.0.0.Y 60
Configuring the PCs
Go around each of the PCs and enable DHCP. Desktop > IP Configuration > DHCP
Each PC should now be able to ping one another.