ITNE2003 Lab Tutorial 5

ITNE2003 
Install, Configure, Operate and Troubleshoot Medium-Sized Networks 
Lab Tutorial – 5 of Lesson -5
Victorian Institute of technology

Task Assignment

IP Network to be subnetted: 192.168.10.0/24

HQ: 50 PCs
Branch A: 20 PCs

Network Address Plan

Head Quarter
Total number of IP address required in details Number of IP addresses allocated for PCs Number of IP addresses allocated for router interface Number of IP addresses reserved for future use	53 50 1 11
Allocated subnet	192.168.10.0/26
Network Address	192.168.10.0
Broadcast Address	192.168.10.63
Valid host address range (can be used to assign to PCs, servers, IP phones, printers etc.)	192.168.10.1 – 192.168.10.62
Branch A
Total number of IP address required in details Number of IP addresses allocated for PCs Number of IP addresses allocated for router interface Number of IP addresses reserved for future use	23 20 1 9
Allocated subnet	192.168.10.64/27
Network Address	192.168.10.64
Broadcast Address	192.168.10.95
Valid host address range (can be used to assign to PCs, servers, IP phones, printers etc.)	192.168.10.65 – 192.168.10.94
R1-R2 subnet
Total number of IP address required in details Number of IP addresses allocated for router interfaces Number of IP addresses reserved for future use	4 (for IOS compatibility) 2 0
Allocated subnet	192.168.10.252/30
Network Address	192.168.10.252
Broadcast Address	192.168.10.254
R1 and R2 Interface IP address	192.168.10.253 and 192.168.10.254

Address allocation map

HQ Network	192.168.10.0 192.168.10.63
Branch A	192.168.10.64 192.168.10.95
Unused addresses
R1-R2 subnet	192.168.10.252 192.168.10.255

Router interface description table

This table helps network engineers to quickly identify the routing direction of each interface in a complex network environment.

Router R1 (HQ)
Interface FastEthernet0/0	192.168.10.1/255.255.255.192	To HQ network
Interface FastEthernet0/1	None	Not connected
Interface Serial0/1/0	192.168.10.253/255.255.255.252	To branch A
Router R2 (Branch-A)
Interface FastEthernet0/0	192.168.10.65/255.255.255.224	To Branch A network
Interface FastEthernet0/1	None	Not connected
Interface Serial0/1/0	192.168.10.254/255.255.255.252	To HQ

Network Topology

Before we start to configure the above network, we need to create the topology in our Packet Tracer simulation tool. Based on the above table we can build our network as follows:

Configuration

Router1 Configuration

Hostname

Interface Configuration

As our topology indicates, R1 has two connected interfaces: FastEthernet 0/0 and Serial 0/1/0. It also has FastEthernet 0/1 that is unused in this scenario. Here is how we configure these interfaces.

FastEthernet 0/0

FastEthernet0/1

Interface FastEthernet 0/1 is unused in this scenario, so it’s better to shut down the interface. In real world, shutting down unused interfaces helps having better security in network.

Serial 0/1/0

Interface Serial 0/1/0 in connected to “Branch A” router and it needs an IP address from

192.168.10.253/30 subnet to be operational. We also need to check if this interface is DCE/DTE. As discussed in previous assignments, for DCE interfaces “Clock rate” should be configured on router.

And the configuration for serial 0/1/0 would be:

Router 1 access protection

Save Configuration

Router2 Configuration

Interface Configuration

FastEthernet 0/0

FastEthernet0/1

Serial 0/1/0

As you can see from the output of “show controller” command on RouterBA, serial 0/1/0 on that router is DTE and there is no need to set clock rate on it.

Following figure shows serial 0/1/0 configuration on RouterBA:

Router 2 access protection

Save configurations

Finally, we save the running configuration to NVRAM so routers can load the configuration automatically next time when power on.

After you have successfully configured the two router interfaces, the connection between the interfaces are established and shown in green colour.