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Free CCNA | Configuring EIGRP | Day 25 Lab | CCNA 200-301 Complete Course

3 min read 5 months ago

Published on Nov 25, 2025 This response is partially generated with the help of AI. It may contain inaccuracies.

Table of Contents

Introduction

This tutorial will guide you through configuring EIGRP (Enhanced Interior Gateway Routing Protocol) as part of your CCNA 200-301 training. You'll learn about EIGRP metrics, route selection, and how to implement unequal-cost load balancing. By the end of this tutorial, you will have practical experience with EIGRP configuration, which is essential for network management and troubleshooting.

Step 1: Set Up Your Lab Environment

Download Packet Tracer: Ensure you have Cisco Packet Tracer installed. You can download it from NetAcad.
Create a New Project: Open Packet Tracer and start a new project.
Add Devices: Drag and drop the necessary routers and switches to your workspace. Typically, you would need at least two routers to configure EIGRP.

Step 2: Configure EIGRP on Routers

Access the Router CLI: Click on the router and go to the CLI tab.
Enter Global Configuration Mode:
```
enable
configure terminal
```
Enable EIGRP:
- Use the following command to enable EIGRP with a specific Autonomous System (AS) number:
```
router eigrp [AS_number]
```
- Replace [AS_number] with your chosen AS number, e.g., router eigrp 10.
Configure Network Statements:
- Include the networks that will participate in EIGRP:
```
network [IP_address] [wildcard_mask]
```
- Example:
```
network 192.168.1.0 0.0.0.255
```

Step 3: Understand EIGRP Metrics

EIGRP Metric Calculation: EIGRP uses a composite metric based on bandwidth and delay. The formula to calculate the EIGRP metric is:
```
Metric = (K1 * bandwidth) + (K2 * bandwidth / (256 - load)) + (K3 * delay)
```
Modify EIGRP Metrics:
- You may need to adjust bandwidth or delay values in your configuration to optimize routing paths.
- Set bandwidth on an interface:
```
interface [interface_id]
bandwidth [value]
```

Step 4: Implement Unequal-Cost Load Balancing

Enable Unequal-Cost Load Balancing:
- This feature allows EIGRP to use multiple routes to the same destination with different metrics.
- Use the command:
```
variance [value]
```
- Set the variance to the desired value to allow the use of routes with metrics higher than the best route.

Step 5: Verify EIGRP Configuration

Show EIGRP Neighbors:
- Use the command:
```
show ip eigrp neighbors
```
- This command helps ensure that EIGRP neighbors are correctly established.
Show EIGRP Routes:
- Check the routing table for EIGRP routes:
```
show ip route eigrp
```

Conclusion

In this tutorial, you learned how to configure EIGRP, understand its metrics, and implement unequal-cost load balancing in your network. Make sure to practice these configurations in your lab environment to solidify your understanding. As you advance, consider exploring more complex EIGRP features and settings to enhance your CCNA skills. Keep experimenting with different network topologies and configurations to prepare for your CCNA exam.

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