The document summarizes a network design project for the HS3 building. It proposes a multilayered network topology with VLANs to make the network reliable, accessible, scalable and secure. The network uses switches instead of hubs and implements VLANs to separate broadcast domains. Inter-VLAN communication is enabled through a router connecting the VLANs. The network design is modeled and evaluated using OPNET simulation to analyze performance metrics like queuing delay and HTTP response times across different VLANs.

1. Network Design for HS3 Building
Abhimanyu Pandey
Anil Manandhar
Mahesh Tripathy
Pawan Adhikari

2. Introduction
• Aim of project: To model network of HS3 building
• Network should be:
o Reliable
o Accessible
o Scalable
o Secure
• Need for simulation:
o Expensive hardware
o Network parameters
• Tools used: OPNET Simulation

3. HS3 Building departments
Prosthetics & Orthotics 7
Podiatry 10
Social Work & Policy 2
Physiotherapy 20
Occupational Therapy 24
Dietetics & Human Nutrition 9
Allied Health HOS 17
Health Science Clinics 5
service /Desktop support 1
Graduate Assistant Teacher/Fellow 2
Associate Dean International 1
Coordinate HIM professor 1
Senior Advisor,clinicical school 1
MFD fleet support officer 1

4. User Profiles/Application profiles
Teacher
rooms
Practical
room/ class
room
Lab rooms Common
meeting
rooms
Common
shared
rooms
Record
rooms
Web browsing heavy ✓ ✓ ✓
Web browsing medium ✓ ✓ ✓
Email Heavy ✓ ✓ ✓
Email medium ✓ ✓ ✓
File transfer heavy ✓ ✓
File transfer medium ✓ ✓ ✓
File print heavy ✓ ✓
File print light ✓ ✓ ✓

5. Selection of network topology
Flat network Topology Vs. Multilayered Design
→Networking Devices
→Cost efficiency with contrast to network Debugging
→ Broadcast Domain/Collision Domain

6. Multilayered Design
→ MDF and IDF
→Scalability

7. Access Layer Design
→ Unshielded Twisted cabling
→Switches and not Hubs-CISC0 2960S
→Power over Ethernet
→ Link Standards in IDF and MDF platforms
- 100 Base T over CAT5 UTP
→Need of Gigabit Ethernet
- Exploding Bandwidth Requirements
-Existing UTP instead of Fiber gigabit

8. Access Layer Design

9. Introduction to VLAN
→ Feature of Multilayered Topology
→ Switches Separating Broadcast Domains.
→ Native VLAN
→ Subnets Vs. VLAN

10. Building topology

11. Opnet Modelling – Native VLAN
• Link utilization with default VLAN

12. VLAN
• Allows mulitple IP network and subnets to
exist in the same switched network
• VLAN ID: identification of same group of
network
• Access link: link with single VLAN ID
• Trunk Link: link with multiple VLAN ID

13. WHY VLAN? -Security

14. WHY VLAN?-STP use
• STP: bridge protocol that utilizes the spanning-tree
algorithm
• helps the bridges or switches to be loop free
• shut down bridge interface to maintain loop free
• Priority to block:
1. A lower Root Bridge ID.
2. A lower path cost to the Root.
3. A lower Sending Bridge ID.
4. A lower Sending Port ID.

15. WHY VLAN?-Limited Recourse
Management
• PVST+: per VLAN STP

16. Inter VLAN Communication
• One Armed Router: single physical interface
route the different vlan on a network
• router accepts VLAN tagged traffic on the trunk
interface
• then internally route the VLANs using
subinterfaces

17. One Armed Router-Secure Resource
management

18. Project implementation- on Fifth floor
components ip addresss subnet mask
Printer_1 192.0.1.200 255.255.255.0
Printer_2 192.0.2.200 255.255.255.0
Printer_3 192.0.3.200 255.255.255.0
Teacher_DeptC 192.0.3.250 255.255.255.0
Teacher_DeptD 192.0.4.250 255.255.255.0
Teacher_DeptE 192.0.5.250 255.255.255.0
Class 192.0.8.10 255.255.255.0
Class_2 192.0.8.100 255.255.255.0
Record room 192.0.10.10 255.255.255.0
Shared 192.0.7.10 255.255.255.0
Meeting 192.0.6.10 255.255.255.0

19. Results comparison-Queuing delay
from core switch to floor switch

20. Result comparison-page response of
HTTP by Teacher Dept C

21. Result comparison-HTTP received by
Teacher Dept C