🏢 OSPF Multi-Router Office Network

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Table of Contents

1. 📘 Project Overview
2. 🎯 Project Objective
3. 🌐 Network Topology
4. 🗂️ Device Interface Table
5. 📝 IP Addressing Table
6. 🔧 Lab Steps
7. 💻 Device Configuration
   • 🚦 Router 1
   • 🚦 Router 2
   • 🚦 Router 3
   • 🔀 Switch 1
   • 🔀 Switch 2
   • 🔀 Switch 3
   • 🖥️ PC & Server Configuration
8. ✅ Verification Commands
9. ⚡ How to Run Lab
10. 📂 Folder Structure
11. 🎓 Learning Outcomes
12. ℹ️ Repository Info

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📘 Project overview

Implement OSPF across multiple routers to demonstrate dynamic routing in an enterprise environment. The lab uses Packet Tracer.

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🎯 Project Objective

• Configure OSPF area 0 across 3 routers.
• Configure serial WAN links (/30) between routers.
• Configure LANs for 3 sites with PCs and a server.
• Verify OSPF adjacency, routing, and end-to-end connectivity.

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🌐 Network Topology

• 3 Routers (R1, R2, R3)
• 3 Switches (SW1, SW2, SW3)
• 6 PCs (PC1..PC6) — 2 per LAN
• 1 Server (Server1) in LAN1 (on SW1)

Subnets

• LAN1: 192.168.10.0/24 (R1)
• LAN2: 192.168.20.0/24 (R2)
• LAN3: 192.168.30.0/24 (R3)
• WAN1 (R1-R2): 10.0.12.0/30
• WAN2 (R2-R3): 10.0.23.0/30

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📁 Device Interface Table

Connections:

R1 G0/0 <-> SW1 Fa0/1 R2 G0/0 <-> SW2 Fa0/1 R3 G0/0 <-> SW3 Fa0/1

R1 S0/3/0 <-> R2 S0/3/1 (Serial DCE <-> DTE) network 10.0.12.0/30 R2 S0/3/0 <-> R3 S0/3/0 (Serial DCE <-> DTE) network 10.0.23.0/30

PC1 Fa0/2 <-> SW1 Fa0/2 PC2 Fa0/3 <-> SW1 Fa0/3 Server1 Fa0/4 <-> SW1 Fa0/4

PC3 Fa0/2 <-> SW2 Fa0/2 PC4 Fa0/3 <-> SW2 Fa0/3

PC5 Fa0/2 <-> SW3 Fa0/2 PC6 Fa0/3 <-> SW3 Fa0/3

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📝 IP addressing Table

Device	Interface / Notes	IP Address / Mask	Gateway
PC1	LAN1	192.168.10.11/24	192.168.10.1
PC2	LAN1	192.168.10.12/24	192.168.10.1
PC3	LAN2	192.168.20.21/24	192.168.20.1
PC4	LAN2	192.168.20.22/24	192.168.20.1
PC5	LAN3	192.168.30.31/24	192.168.30.1
PC6	LAN3	192.168.30.32/24	192.168.30.1
Server1	LAN1	192.168.10.100/24	192.168.10.1

Router addresses:

Device	Interface	IP/Mask
R1	G0/0	192.168.10.1/24
R1	S0/3/0	10.0.12.1/30 (DCE)
R2	G0/0	192.168.20.1/24
R2	S0/3/1	10.0.12.2/30 (DCE)
R2	S0/3/0	10.0.23.1/30 (DTE)
R3	G0/0	192.168.30.1/24
R3	S0/3/0	10.0.23.2/30 (DTE)

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🔧 Lab Steps

1. Build topology in Packet Tracer (place devices & connect cables).
2. Configure PCs and Server (static IPs).
3. Configure switches .
4. Configure routers interfaces and set clock rate on DCE serials.
5. Configure OSPF (area 0) on all routers.
6. Verify OSPF neighbors and learned routes.
7. Test end-to-end pings (PC to PC, PC to Server).
8. Capture screenshots.

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💻 Device Configuration

🚦 Router 1

interface GigabitEthernet0/0
description LAN to SW1
ip address 192.168.10.1 255.255.255.0
no shutdown

View Full Configuration File →

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🚦 Router 2

interface GigabitEthernet0/0
description LAN to SW2
ip address 192.168.20.1 255.255.255.0
no shutdown

View Full Configuration File →

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🚦 Router 3

interface GigabitEthernet0/0
description LAN to SW3
ip address 192.168.30.1 255.255.255.0
no shutdown

View Full Configuration File →

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🔀 Switch 1

!Create VLAN 10

vlan 10
name HR

!Router uplink

interface FastEthernet0/1
description Uplink to R1 G0/0
switchport mode access
switchport access vlan 10
no shutdown

View Full Configuration File →

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🔀 Switch 2

vlan 20
name Finance

!Router uplink

interface FastEthernet0/1
description Uplink to R2 G0/0
switchport mode access
switchport access vlan 20
no shutdown

View Full Configuration File →

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🔀 Switch 3

vlan 30
name Sales

!Router uplink

interface FastEthernet0/1
description Uplink to R3 G0/0
switchport mode access
switchport access vlan 30
no shutdown

View Full Configuration File →

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💻 PC & Server Configuration

Device	Interface	IP Address	Subnet Mask	Default Gateway	VLAN	Notes
PC1	NIC	192.168.10.11	255.255.255.0	192.168.10.1	10	Connected to SW1 F0/2
PC2	NIC	192.168.10.12	255.255.255.0	192.168.10.1	10	Connected to SW1 F0/3

Refer to full files: PC Configs →

| Server1 | NIC | 192.168.10.100 | 255.255.255.0 | 192.168.10.1 | 10 | Connected to SW1 F0/4 |

Refer to full files: SERVER Configs →

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✅ Verification Commands

🗺️ Topology Screenshot

shows the full lab layout in Packet Tracer.

🔍 VLAN Verification

• Verified VLANs on SW1, SW2, SW3. All access ports assigned correctly.

🔀SW1

🔀SW2

🔀SW3

🖧 MAC Address Table Verification

• Verified MAC addresses learned correctly on each switch.

🔀Sw1

🔀SW2

🔀SW3

🚦 Router Interfaces Verification

• All LAN and Serial interfaces are up with correct IPs.

🚦R1

🚦R2

🚦R3

🤝 OSPF Neighbor Verification

• R1 sees R2, R2 sees R1 & R3, R3 sees R2.

🚦R1

🚦R2

🚦R3

🗺️ OSPF Routing Table Verification

• All routers have OSPF learned routes to all LANs.

🚦R1

🚦R2

🚦R3

📶 Ping Tests

📶PC1 Ping R1

📶PC1 Ping PC3

📶PC1 Ping PC5

📶PC1 Ping Server

📶PC3 Ping R2

📶PC3 Ping PC1

📶PC3 Ping PC5

📶PC5 ping R3

📶PC5 Ping Server

📶PC5 Ping PC3

✨ Optional: Traceroute Verification

📶PC6 to Server to verify path through routers.

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⚡ How to Run Lab

1. Open the lab file

   • Open Packet Tracer and load the lab file located at: lab-files/ospf-multi-router-office-network.pkt

2. Verify device connectivity

   • Check that all PCs, switches, and routers are powered on and connected correctly.

3. Apply configurations (if needed)

   • Router configurations: router-configs/r1.cfg, r2.cfg, r3.cfg

   • Switch configurations: switch-configs/sw1.cfg, sw2.cfg, sw3.cfg

   • PC and Server configurations: pc-configs/pc-configs.txt, server-configs.txt

4. Follow lab steps

   • Configure OSPF area 0 across all routers

   • Verify VLAN assignments and switch connectivity

   • Test end-to-end connectivity using ping and traceroute

5. verification screenshots

   • Save screenshots of OSPF neighbors, routing tables, VLAN tables, and ping results for documentation

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📂 Folder Structure

ospf-multi-router-office-network/ ├── drawio/ │ └── topology.drawio
│ ├── lab-files/ │ └── ospf-multi-router-office-network.pkt
│ ├── pc-configs/ │ ├── pc-configs.txt │ └── server-configs.txt │ ├── router-configs/ │ ├── r1.cfg │ ├── r2.cfg │ └── r3.cfg │ ├── switch-configs/ │ ├── sw1.cfg │ ├── sw2.cfg │ └── sw3.cfg │ ├── screenshots/ │ ├── pc1_ping_pc3.png │ ├── pc1_ping_pc5.png │ ├── pc1_ping_r1.png │ ├── pc1_ping_server.png │ ├── pc_ping_pc1.png │ └── pc3_ping_pc5.png │ ├── pc3_ping_r2.png │ ├── pc5_ping_pc3.png │ ├── pc5_ping_r3.png │ ├── pc5_ping_server.png │ └── pc6_traceroute_server.png │ ├── r1_ip_int.png │ ├── r1_ospf_neighbor.png │ ├── r1_ospf_route.png │ ├── r2_ip_int.png │ └── r2_ospf_neighbor.png │ ├── r2_ospf_route.png │ ├── r3_ip_int.png │ ├── r3_ospf_neighbor.png │ ├── r3_ospf_route.png │ └── sw1_mac.png │ ├── sw1_vlan.png │ ├── sw2_mac.png │ ├── sw2_vlan.png │ ├── sw3_mac.png │ └── sw3_vlan.png │ ├── topology/ │ └── topology.png │ ├── README.md ├── verification.md └── LICENSE

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🎓 Learning Outcomes

By completing this lab, you will be able to:

• Configure OSPF dynamic routing across multiple routers in an enterprise network

• Assign and verify VLANs and switch port configurations

• Configure router serial WAN links (/30) for point-to-point connectivity

• Verify routing tables and OSPF neighbor relationships

• Perform end-to-end connectivity tests using ping and traceroute

• Understand device interface management and subnetting for small office networks

• Use Cisco Packet Tracer for practical network simulation and documentation

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📂 Repository Info

This project is part of my CCNA Lab Portfolio.
Explore more labs here 👉 @asmymhm

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