Configure a basic router setup using Cisco Packet Tracer or a similar network simulation tool.

Sure, here are the steps to configure a basic router setup using Cisco Packet Tracer:

1. Open Cisco Packet Tracer: Start by launching the Cisco Packet Tracer program on your computer.

2. Choose a Router: From the bottom-left pane, select the 'Routers' option. Choose a router model (for example, 2811) and drag it to the main workspace.

3. Add End Devices: Now, select 'End Devices' from the bottom-left pane and drag a couple of PCs to the workspace.

4. Connect Devices: Select the 'Connections' option (it looks like a lightning bolt) from the bottom-left pane. Choose the 'Automatic' option and click on the router. A list of interfaces will appear. Select FastEthernet0/0. Now click on one of the PCs. The 'FastEthernet' option will appear. Click on it. Repeat this step to connect the router to the other PC.

5. Configure Router: Click on the router. A new window will open. Click on the 'CLI' tab. You will see a command line interface. Press 'Enter' to get started. Type 'enable' and press 'Enter'. Then type 'configure terminal' and press 'Enter'. Now you are in global configuration mode.

6. Assign IP Address to Router Interfaces: Type 'interface FastEthernet0/0' and press 'Enter'. Then type 'ip address 192.168.1.1 255.255.255.0' and press 'Enter'. This assigns the IP address to the interface. Type 'no shutdown' and press 'Enter' to activate the interface. Repeat this step for other interfaces, but make sure to use a different IP address.

7. Configure PCs: Click on one of the PCs. A new window will open. Click on the 'Desktop' tab and then on the 'IP Configuration' option. Enter the IP address as 192.168.1.2 and the subnet mask will auto-fill. Set the default gateway as 192.168.1.1 (the router's IP address). Repeat this step for the other PC, but use a different IP address (for example, 192.168.1.3).

8. Test the Connection: Click on the 'Add Simple PDU' button from the bottom-right pane. Click on one PC and then on the other. If the connection is successful, a tick mark will appear.

Remember, this is a basic setup. Real-world scenarios may require additional configurations like setting up routing protocols, security settings, etc.