Network Interconnection: RIPv2 and OSPF Mutual Route Redistribution

This project demonstrates the interconnection of two distinct routing domains (RIPv2 and OSPF) using a border router to perform mutual route redistribution, achieving full network convergence.

🗺️ Network Topology

🛠️ Technologies & Protocols

• Routing Protocols: RIPv2 & OSPF
• Features: Bidirectional Route Redistribution
• Simulation Environment: GNS3 on Ubuntu Linux
• Platform: Cisco IOS (7200 Series)

⚙️ Project Implementation & Validation

1. Routing Domains Isolation

• RIPv2 Domain: Configured across routers R1, R2, R3, R5, and R6. Full local convergence and internal connectivity validated.
• OSPF Domain: Configured across routers R7, R8, and R9. Full local convergence and neighbor adjacencies established.

2. Border Routing & Redistribution

• R4 acts as the Autonomous System Boundary Router (ASBR).
• Mutual redistribution is configured on R4 to inject RIP routes into the OSPF domain and OSPF routes into the RIP domain.

3. Connectivity Verification

End-to-end communication is fully operational across the entire topology. For instance, R3 (RIP domain) can successfully reach R8 (OSPF domain) via ICMP echo requests (ping), confirming successful cross-protocol routing injection.

💡 Key Technical Highlights

• Administrative Distance Management: Handled the transition between RIP (AD 120) and OSPF (AD 110) on the ASBR (R4) to prevent routing loops and suboptimal routing.
• Metric Seed Configuration: Proper seed metrics were explicitly defined during redistribution to ensure routes are correctly interpreted by each receiving protocol.
• Optimized Subnetting: Used precise /30 subnets for point-to-point links to optimize the IP addressing space.

📁 Repository Structure

• /configs: Contains clean, individual startup configuration files (.cfg) for each router (R1 to R9).
• projet_routageIP_L2.gns3: Main GNS3 topology file.