BGP Routing Implementation

Project Overview

This project implements BGP (Border Gateway Protocol) routing in a Mininet environment based on a specified network topology consisting of three Autonomous Systems (AS).

Network Topology

The network consists of three Autonomous Systems interconnected through eBGP, with internal routers using iBGP and OSPF.

Autonomous System Details

AS 100

• Routers: R11, R12, R13, R14
• Devices:
  • Client: C11
  • Switch: S11 (connects C11 to R11)
• Internal Structure:
  • Forms a full mesh topology between all routers
  • R14 serves as the edge router for eBGP connection
• Connections:
  • R14 connects to R22 (AS200) via eBGP
  • All internal routers connected via iBGP
  • OSPF running internally

AS 200

• Routers: R21, R22, R23, R24
• Devices:
  • Client: C22
  • Switch: S2 (connects C22 to R21)
• Internal Structure:
  • Forms a full mesh topology between all routers
  • R22 and R23 serve as edge routers
• Connections:
  • R22 connects to R14 (AS100) via eBGP
  • R23 connects to R34 (AS300) via eBGP
  • All internal routers connected via iBGP
  • OSPF running internally

AS 300

• Routers: R31, R32, R33, R34
• Devices:
  • Client: C33
  • Switch: S33 (connects C33 to R33)
• Internal Structure:
  • Forms a full mesh topology between all routers
  • R34 serves as the edge router
• Connections:
  • R34 connects to R23 (AS200) via eBGP
  • All internal routers connected via iBGP
  • OSPF running internally

Protocol Implementation

1. External BGP (eBGP):

   • Connection between AS100 and AS200: R14 - R22
   • Connection between AS200 and AS300: R23 - R34
   • Shown as red dashed lines in the topology

2. Internal BGP (iBGP):

   • Full mesh iBGP connections within each AS
   • Shown as black dashed lines in the topology

3. OSPF:

   • Running within each AS
   • Used for internal routing

Client Connectivity

• C11: Connected to AS100 through switch S11 and router R11
• C22: Connected to AS200 through switch S2 and router R21
• C33: Connected to AS300 through switch S33 and router R33

Project Requirements

1. Implement the complete network topology in Mininet environment
2. Configure all routing protocols:
   • eBGP for inter-AS communication
   • iBGP for intra-AS routing
   • OSPF for internal routing within each AS
3. Ensure proper connectivity between all clients

Development Status

🚧 Note: This repository is currently under development.

To-Do List

• Network topology implementation
• OSPF configuration for each AS
• iBGP mesh configuration within AS
• eBGP peering configuration
• Client connectivity setup
• Testing and validation
• Documentation completion

Licencse

This project is licensed under the Creative Commons Legal Code CC0 1.0 Universal. See the LICENSE file for details.