Wireless LAN Design. Gitau Ayub Makimei F17/10456/2003. Supervisor - Dr. Cyrus Wekesa Examiner - Dr. G.S.O Odhiambo PJ 068

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1 Wireless LAN Design PJ 068 Gitau Ayub Makimei F17/10456/2003 Supervisor - Dr. Cyrus Wekesa Examiner - Dr. G.S.O Odhiambo

2 Objectives The objective of this project was to understand the current network topology of UON and to come up with a design of a local wireless network for the University of Nairobi (UON WLAN) built upon the wireless network standards.

3 Functional Specification for the UON WLAN infrastructure Secure wireless networks shall complement rather than replace an institution s wired network Institutions should provide secure wireless access to curriculum and administration resources from a wide range of work spaces in the institution Wireless networking equipment shall conform to the IEEE a/b/g standards. Wireless networks shall be secured.

4 LAN Architecture Core Distribution Router Campus Backbone Router Building Backbone Access Switch PC PC PC PC PC PC PC PC Remote workgroups Local workgroups

5 Campus LAN architecture

6 UON Campuses connecting to servers at the ICT center ICT center Core servers chiromo Core router Proposed Kenya science Lower Kabete kikuyu Other remote campuses Parklands Main campus

7 Campus-Wide: Main Campus Backbone ICT Education SWA JKML 2KM JKML BACKBONE BUILDER Administration Building ADD American Wing Gandhi Wing

8 Digital Leased Line Inter-Campus Links UoN Backbone KENYA DATA NETWORKS (DIGITAL LEASED LINES) Proposed Kenya science LAN Parklands campus LAN Lower Kabete LAN

9 University-Wide Internet Connectivity Satellite INTERNET Leased Line Proxy Server Server Web Server Router Firewall DNS Server

10 Analyze Requirements Design Methodology Develop Internetwork Structure (Topology) Set Up Addressing and Naming Conventions Hardware/software setup Security measures Implement, Monitor, Maintain the Network

11 Overview Main areas of the University campus that drive the requirements of wireless access-solution; Students Lecturers University Services

12 The Need for VLANs Due to the difference in service requirements of students, lectures and University services, they are grouped into different VLANs; This is due to the fact that, they require different authentification levels. VLANs LibServ (L ) -Students Don (D) - Lecturers MainOFc (M) Front offices Admin (X) Network administrators

13 D D-lectures L-Students X-Admin M- front offices Different VLAN stations connections

14 Different VLANs accessing the network via a single AP but routed to different servers

15 Structure of UON WLAN main campus Catalyst 3750G offers 24 PoE ports

16 Sketch of JKML A linear array of APs with coverage area

17 2 APs positioned as shown Covers the building with wireless connection Sketch of American Wing

18 Main campus Coverage area BS- bookshop EB- education building H- hyslop GW- Gandgi wing building

19 Membership MAC Address VLAN L X L M Assignment of MAC addresses to different VLANs.

20 Security Measures Use of security switches and firewall. Example Catalyst 2948G switch (Cisco) ; can be configured to work as a VMPS

21 Security Measures Use of RADIUS authentification. Remote Authentification Dial-In-User Service- used to manage Access to the internet or internal network. It provides a centralized authentification and accounting for stations to connect and use a network service Mac addressing. Only stations with permission access the wireless service Use of VLANs This offers internal security Reduced broadcasting strength of APs where possible

22 Conclusion With the UONWLAN, students can have a powerful work tool that can be used to solve queries, researches, university projects and several other activities. As bigger is the use of these equipments from the students, more will be their degree of freedom and work capability. The UON WLAN can deliver a very different user experience in the Education campus. It enables students to access information and study no matter where they are in the campus and no matter what time it is. The experience of understanding the UON network topology and designing a WLAN has been invaluable. Through the process of this project, practical knowledge has been gained about realistic projects in industry. After having such a positive experience, the future seems promising and bright.

23 END