This project focuses on designing and simulating a secure, scalable, and resilient enterprise network using Cisco Packet Tracer. The network is developed to support the expansion of a trading floor support center into a new facility, ensuring high availability, efficient routing, and strong security practices.
A hierarchical network model (Core, Distribution, Access layers) is implemented with redundancy at every level to guarantee reliability and future scalability.
- Design a hierarchical enterprise network architecture
- Implement redundancy at core and ISP levels
- Segment departments using VLANs and subnetting
- Configure Inter-VLAN routing using Layer 3 switches
- Implement OSPF dynamic routing
- Provide secure remote access using SSH
- Configure NAT & PAT for internet access
- Enhance security using ACLs and Port Security
- Validate network functionality using Packet Tracer simulation
-
Core Layer
- Dual core routers
- Dual multilayer switches
- Dual ISP connectivity
-
Distribution Layer
- Departmental switches
- VLAN-based segmentation
-
Access Layer
- End-user PCs
- Wireless Access Points
- Cisco Packet Tracer
- Routers & Layer 3 Switches
- OSPF (Open Shortest Path First)
- VLANs & Subnetting
- DHCP
- NAT / PAT
- ACLs
- SSH
- Port Security
- SNMP (Monitoring & Management)
-
Base Network:
192.168.0.0/22 -
Departmental VLANs:
- Sales & Marketing –
192.168.10.0/24 - HR & Logistics –
192.168.20.0/24 - Finance & Accounts –
192.168.30.0/24 - Admin & Public Relations –
192.168.40.0/24 - ICT –
192.168.50.0/24 - Server Room –
192.168.60.0/24
- Sales & Marketing –
-
Core Router Links:
10.10.10.0/30 -
ISP Public IPs:
103.133.254.0/30series
- Access Control Lists (ACLs) for traffic filtering
- Port Security (Finance department)
- NAT & PAT for secure internet access
- SSH v2 for encrypted device management
- MAC address restriction on sensitive ports
- Dynamic Routing: OSPF Area 0
- Static Routes: For default gateway and ISP failover
- Inter-VLAN Routing: Implemented using SVIs on Layer 3 switches
- DHCP Relay (IP Helper Address) for dynamic IP assignment
- ICMP (Ping) testing between VLANs
- Traceroute verification
- DHCP IP allocation testing
- Redundancy and failover testing
- Port security and ACL validation
All tests were successfully simulated in Cisco Packet Tracer.
- Reliable inter-department communication
- Secure and segmented network
- High availability with ISP and core redundancy
- Efficient routing with OSPF
- Scalable design suitable for future expansion
- Cisco Networking Academy, Routing and Switching Essentials v6 Companion Guide, Cisco Press, 2016
- Anany Singh (RA2311031010085)
- Syed Muhammad Rizvi (RA2311031010086)
- Ishan Shrinath (RA2311031010064)
- Course: 21CSC302J – Computer Networks
- Institution: SRM Institute of Science and Technology
- Department: Networking and Communications
- Submission Date: November 2025
This project is intended for academic learning and simulation purposes and demonstrates best practices in enterprise network design using Cisco technologies.