Jeremy's IT Lab: CCNA Course

Introduction

• Free, complete course for CCNA.
• Subscription and engagement encouraged for more free content.
• Lab files available via link in the description.
• Recommended tool: Boson's NetSim for CCNA, useful for deeper practice and understanding.

Video Focus: EIGRP Configurations

• Basic EIGRP configurations.
• Not directly on the exam but introduces key related topics:
  • EIGRP metric
  • Path selection
  • Unequal-cost load-balancing
• Half lab, half lecture format.

Network and Configuration Details

• Network setup: EIGRP AS100.
• Configuration steps:
  1. Hostnames and IP addresses configuration.
  2. Loopback interface configuration on routers R1 to R4.
  3. EIGRP configuration steps.
  4. Explanation of EIGRP metric and paths.

Step 1: Basic Configuration

• Hostnames, IP addresses, and router interfaces setup.

Step 2: Loopback Interface Configuration

• Loopback interface provides a router ID for protocols like OSPF.
• Command examples:
  • Loopback creation: INTERFACE LOOPBACK0
  • IP configuration: IP ADDRESS 1.1.1.1 255.255.255.255

Step 3: EIGRP Configuration

• Directly enter EIGRP config from interface config mode.
• Key commands:
  • Enable EIGRP: ROUTER EIGRP 100
  • Enable on all interfaces: NETWORK 0.0.0.0 255.255.255.255
  • Auto-summary: NO AUTO-SUMMARY
  • Passive interface configuration for efficiency.

EIGRP Metric and Path Selection

• Metric Calculation:
  • Uses bandwidth and delay.
  • Bandwidth of slowest link + delay of all links.
• Terminology:
  • Feasible Distance: The router's metric to destination.
  • Reported Distance: Neighbor's metric to destination.
  • Successor: Best route with lowest metric.
  • Feasible Successor: Alternate route, meets feasibility condition.

Unequal-Cost Load-Balancing

• Unique feature of EIGRP.
• Controlled by the VARIANCE command.
• Feasibility condition for load-balancing:
  • Only feasible successor routes considered.

Practice and Resources

• Boson ExSim practice question demonstrated.
• Understanding EIGRP terms and definitions.
• Resources: Cisco documentation, Boson ExSim.

Conclusion

• Encouragement to subscribe and support the channel.
• Acknowledgment of channel members.
• Options for leaving tips and showing support via Brave browser.