🚀 OSPF + DHCP Network Lab (Cisco Packet Tracer)

🧠 Overview

This lab demonstrates a multi-router OSPF routing setup with DHCP, using Cisco Packet Tracer.
The project includes:

• 🔁 OSPF routing across 3 routers
• 🆔 Loopback interfaces for stable Router IDs
• 🚫 Passive interfaces for LAN security
• 🌐 DHCP Server enabled on Router2
• 💻 PC-to-PC communication across different subnets

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🖥️ Topology

[PC1]---[SW1]---[Router1]---[Router2]---[Router3]---[SW3]---[PC3] | DHCP Server

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📁 Project Structure

ospf-dhcp-project/ ├── OSPF-DHCP.pkt ← Packet Tracer project file ├── README.md ← This file └── configs/ ├── Router1.txt ├── Router2.txt └── Router3.txt

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🛠️ Technologies Used

• Cisco Packet Tracer 8.x
• OSPF (single area - area 0)
• DHCP configuration on Router2
• Loopback interfaces as Router ID
• Passive Interface for LAN ports

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🧪 How to Test

1. Open OSPF-DHCP.pkt in Packet Tracer.
2. Open any PC and verify:
   • IP is assigned via DHCP
   • You can ping PCs across networks
3. On routers, verify:
   • show ip ospf neighbor
   • show ip route ospf
   • show ip dhcp binding

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📄 Configuration Notes

Router	Key Features
Router1	OSPF with router-id 1.1.1.1, DHCP relay not needed
Router2	DHCP Server, OSPF with router-id 2.2.2.2, passive LAN
Router3	OSPF with router-id 3.3.3.3, receives routes via OSPF

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✅ Project built and tested by [Shahin Akbari] using Cisco Packet Tracer