Free CCNA | Dynamic Routing | Day 24 | CCNA 200-301 Complete Course

Introduction

This tutorial will guide you through the basics of dynamic routing as covered in the CCNA 200-301 course. You will learn about different dynamic routing protocols, the concepts of metrics and administrative distance, and how these elements influence route selection. This information is crucial for anyone preparing for the CCNA exam or working with Cisco networking.

Step 1: Understand Network Topology

• Familiarize yourself with network topology concepts.
• Know how devices are connected and how data flows within the network.
• Analyze common topologies such as star, bus, and ring.

Step 2: Differentiate Between Route Types

• Learn about Network Routes and Host Routes.
  • Network Route: Represents a network segment.
  • Host Route: Represents a single device.

Step 3: Explore Dynamic Routing

• Understand what dynamic routing is and why it is used.
• Recognize the advantages over static routing, such as adaptability and scalability.

Step 4: Compare Dynamic and Static Routing

• Identify key differences:
  • Dynamic Routing: Automatically adjusts to changes in the network.
  • Static Routing: Requires manual configuration and does not change unless updated by an administrator.

Step 5: Review Dynamic Routing Protocol Types

• Familiarize yourself with the main dynamic routing protocols:
  • OSPF (Open Shortest Path First)
  • EIGRP (Enhanced Interior Gateway Routing Protocol)
  • RIP (Routing Information Protocol)
  • IS-IS (Intermediate System to Intermediate System)
  • BGP (Border Gateway Protocol)

Step 6: Understand IGP and EGP Algorithms

• Distinguish between Interior Gateway Protocols (IGP) and Exterior Gateway Protocols (EGP).
• IGPs operate within a single organization, while EGPs connect different organizations.

Step 7: Study Distance Vector and Link State Protocols

• Distance Vector Protocols: Share routing information based on distance to reach a network.
• Link State Protocols: Share information about the status of links in the network, providing a more accurate view of the network topology.

Step 8: Learn About Metrics

• Understand what metrics are and how they are used in routing decisions.
• Metrics can include hop count, bandwidth, delay, and reliability.

Step 9: Explore Equal-Cost Multi-Path (ECMP) Routing

• Learn how ECMP allows multiple routes to the same destination with equal metrics.
• Understand the benefits of load balancing traffic across these paths.

Step 10: Recognize Administrative Distance (AD)

• Define Administrative Distance as the trustworthiness of a route.
• Learn the default AD values for various routing protocols:
  • Directly connected: 0
  • Static: 1
  • EIGRP: 90
  • OSPF: 110
  • RIP: 120
  • External BGP: 20

Step 11: Configure AD of Static Routes

• Understand how to change the Administrative Distance of static routes for specific configurations.
• Example command to configure AD:

  ip route [destination] [subnet mask] [next-hop] [administrative distance]
  

Step 12: Implement Floating Static Routes

• Learn about floating static routes which are used as a backup to dynamic routes.
• Set a higher AD for these routes so they only become active if the primary route fails.

Conclusion

In this tutorial, you have learned the fundamentals of dynamic routing, including the various protocols, the importance of metrics and administrative distance, and their roles in route selection. To deepen your understanding, consider practicing with Packet Tracer labs or using resources such as Boson ExSim for exam preparation. Continue exploring advanced topics in dynamic routing as you prepare for the CCNA exam.