Using Packet Tracer has allowed computer networking professionals to design networks, teach ideas and concepts, and save time on brainstorming. Although it’s a wonderful tool, making a simple network is a challenge if you aren’t familiar with the program.

One of the most basic computer networks that you can create involves two computers and a router. Although it would seem simple in connecting the two computers to a router and calling it quits, configuring the Cisco IOS settings actually takes a bit of work. It’s quite unlike a commercial router that is widely available to consumers for home usage.

Make certain that you are using a crossover cable when connecting the desktop to the Ethernet port of the router. Computers and routers are both “like” devices, so you wouldn’t want to use a straight-through cable to connect them. Also make sure that you have a console cable if you plan on configuring the router on a real network, as you will not be able to access the running configuration otherwise.

The IP addresses you assign will be the logic of the operation. It’s up to you which network numbers and addresses you use, but they must follow a certain convention in order to work. You will be using at least four IP addresses total, counting your two desktop machines and two Ethernet ports on the router. Assign each Ethernet port and IP address that corresponds to a certain network. If you assign both to the same network, you will quickly see the configuration won’t work.

Even with all of the IP address information in place, and the Ethernet ports configured, there is still something missing. We haven’t installed a gateway address on the desktop machines. Without a gateway address, the computer won’t be able to send and receive information over the network. It’s simple to assign: the gateway address is going to be the IP address of the Ethernet interface that is connected to the desktop in question.

Troubleshooting is what computer network technicians are known for. If you find that your network isn’t working at this point, you shouldn’t be surprised. There are hundreds of reasons a network can go wrong, ranging from physical connections to input errors. The trick is to troubleshoot the symptoms of the network to see where you went wrong and how to fix it. Try to complete the troubleshooting process by yourself, as it will be more of a meaningful lesson for the future.

Closing Comments

A basic network is easy to setup in theory, but harder to actually create. Confusing Cisco IOS commands and problems such as a faulty cable is enough to give anyone a hard time. Internet tutorials and troubleshooting tactics are a good solution if you have hit a stumbling block.

Learn more about packet tracer tutorial and configure router in packet tracer.