Serial Point-to-Point Overview
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Nerd Cafe
Last updated
To understand the Serial Point-to-Point Overview in a practical way, let’s break it down with a real-world scenario, topology, and simulation steps in GNS3.
In this example, we will simulate a simple point-to-point serial link between two routers. A serial connection typically uses a dedicated link between two routers, often used in WAN (Wide Area Network) connections. The serial link in this case will be used to connect two routers to communicate with each other.
Let’s create a simple topology:
Router1 (R1)
Router2 (R2)
A serial link between R1 and R2
The interfaces used for the serial link will be Serial3/0 on both routers. The routers will use PPP (Point-to-Point Protocol) on the serial link to ensure communication.
Step 1: Build the Topology in GNS3
Open GNS3 and create a new project.
Drag and drop two routers (e.g., Cisco 7200 or Cisco 2900 series) into the workspace.
Add a serial link between the two routers. Use Serial0/0/0 on both routers.
Connect the routers using a serial link (use a crossover cable or a serial cable between the interfaces).
Access Router1 and enter the configuration mode:
Configure the Serial Interface on Router1:
Access Router2 and enter the configuration mode:
Configure the Serial Interface on Router2:
Step 3: Verify the Configuration
Check the interface status on Router1:
Ensure the serial interface is up and has the correct IP address.
Check the interface status on Router2:
Testing Connectivity
You can also add a static route or configure routing protocols to enable communication between networks beyond just the serial link.
Example of static routing:
On Router1:
On Router2:
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