Jeremy’s IT Lab - CCNA Course: Static Routing

Introduction

• Objective: Understanding static routing for the CCNA exam.
• Previous Topics: Basics of routing, local and connected routes.
  • Local routes: Routes to router's own IP.
  • Connected routes: Routes to connected network.

Review of Local and Connected Routes

• Local and Connected Routes:
  • Automatically added when configuring IPs on interfaces.
  • Local routes: To router’s own IP.
  • Connected routes: To the network the interface connects to.
• Router R2 Example:
  • Interfaces G0/0 and G0/1 with IPs configured.
  • Routing Table: 4 routes total (2 connected, 2 local).
    • Routes: 192.168.12.0/24, 24.0/24 (connected), 192.168.12.2/32, 24.2/32 (local).
  • R2 knows connected networks, not remote networks.

Static Routes

• Purpose: Enable routing to remote networks not directly connected.
• Configuration:
  • Must be manually added to the routing table.
• Concept of Default Routes:
  • Act as a fallback for packets with no specific matches.
  • Route to 0.0.0.0/0.

Configuring Static Routes

• Example with R1, R3, R4:
  • Essential for two-way communication between PC1 and PC4.
  • Paths: Via R3 (selected path), alternative via R2.
• Route Planning:
  • R1 to 4.0/24 via 192.168.13.3.
  • R3 to 1.0/24 via 192.168.13.1 and 4.0/24 via 192.168.34.4.
  • R4 to 1.0/24 via 192.168.34.3.

Testing Communication

• Ping Test: PC1 to PC4 successful, indicating two-way reachability.

MAC and IP Addressing in Packet Travel

• Encapsulation Process:
  • Source and destination IPs constant.
  • MAC addresses change per hop.

Static Route Configurations

• Next-hop vs. Exit-interface:
  • Next-hop IP or exit-interface can be specified.
  • Example: R2 exit-interface configuration.
• Proxy ARP: Used when specifying only exit interfaces.

Default Route Configuration

• Concept: Routes to 0.0.0.0/0, directs unknown traffic.
• Use Case: Directing internet-bound traffic.
• Example: Default route on R1 configured to internet gateway.

Summary

• Reviewed: Connected and Local Routes, Static Routes, Default Routes.
• Configured: Static routes for two-way communication.
• Highlighted commands: IP ROUTE command format for static routes.

Quiz Review

• Quiz Questions:
  • Configuring default routes on Cisco.
  • Routing table interfaces for specific destinations.
  • Static route configuration and troubleshooting.

These notes summarize the key concepts and configurations covered in the lecture on static routing necessary for the CCNA exam.