CNET Project - Enterprise Network Simulation

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📝 Project Overview

This project simulates a complex, multi-block enterprise network using Cisco Packet Tracer (Instructor Version). It demonstrates core networking concepts and services, such as:

• Dynamic routing protocols (EIGRP, OSPF, RIP)
• Route redistribution between protocols
• VLSM-based IP addressing
• DHCP server implementation
• NAT configuration
• Access Control Lists (ACLs)
• FTP and Email service configuration

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🧠 Key Objectives

• Design a realistic network topology with proper IP planning
• Configure dynamic routing using OSPF (multi-area), EIGRP, and RIP v2
• Implement route redistribution to enable communication between routing domains
• Use VLSM for efficient IP allocation across networks A to N
• Configure centralized DHCP for dynamic IP assignment
• Implement NAT using private and public IPs on edge routers
• Apply ACLs to restrict access to services (e.g., Web Server)
• Setup and test FTP and Email servers

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🔀 Routing Protocols Used

• EIGRP
• OSPF (Area 0, Area 1, etc.)
• RIP Version 2

➕ Route Redistribution

Routing redistribution was done to interconnect different protocol zones:

router ospf 15
 redistribute eigrp 15 subnets
 redistribute rip subnets

router eigrp 15
 redistribute ospf 15 metric 10000 100 255 1 1500
 redistribute rip metric 10000 100 255 1 1500

router rip
 version 2
 redistribute eigrp 15
 redistribute ospf 15

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🗂️ IP Addressing

Private IP Range: 172.16.254.15

Public IP Range: 192.168.1.57

Used VLSM for subnetting based on host requirements

Calculated subnets using: 2^n - 2

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🌐 NAT Configuration

NAT was applied to simulate internet access using public IPs:

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interface fa0/0
 ip nat inside
interface s0/0
 ip nat outside
ip nat inside source list 1 interface s0/0 overload
access-list 1 permit 172.16.0.0 0.0.255.255

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🔐 ACL Implementation

Access Control Lists were used to restrict access:

Blocked one PC from Net A, one Laptop from Net E, and a phone from Net B from accessing the Web Server

Blocked all devices in Network D from the Web Server

Example ACL:

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access-list 100 deny ip host 172.16.10.2 host 192.168.1.100
access-list 100 permit ip any any

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🧪 DHCP Server

Configured to dynamically assign IPs across EIGRP, RIP, and OSPF domains:

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ip dhcp pool NET_A
 network 172.16.10.0 255.255.255.0
 default-router 172.16.10.1
dns-server 8.8.8.8

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📁 FTP Configuration

Assigned a static IP to the FTP Server

Enabled FTP service

Created login credentials for users

Only hosts in Network G can upload/download files

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📧 Email Server

Hosts in Networks H and I configured with email clients

Able to send/receive messages internally using SMTP/POP3

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📌 Summary

This project provided a hands-on simulation of an enterprise-grade network with:

Multiple protocols

Real-world service configurations

Traffic filtering and segmentation

Scalable IP planning using VLSM

It enhances practical skills in routing, subnetting, network services, and security.