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Design , implementation and management of secured lan

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par Eliud Ir. Eliud Aganze
Jomokenyatta university of agriculture and technology - B.sc information technology 2014
  

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2.1. 4.3.0 Identification of LAN design requirement

ü High speed connectivity to access layer switch

ü Scalability(support data, voice and video)

ü Availability(24x7)

ü Manageability(VLAN, Telnet)

ü Security(implementation of VLAN,ACL, Port security)

ü High speed redundant links between switches on LAN and the access layer devices

ü Identification of available hardware for LAN

2.2. 4.3.1 Equipment features

ü 3X1841 Routers (Main, Admin, Academic)

ü 12XSwitches (Admin, Directors, library, academic, lab_201, lab_203, ACE,LB_2,LB_3)

ü Server( DNS,DHCP)

ü 4XWireless router (Academic, Library,Law,Server1)

ü IP telephone

4.3.2 Design Redundancy

ü Use of multiple layer 2 link to increase available bandwidth.

ü Design that incorporate redundancy by using layer 3 switches.

ü Implementation of routing protocol.

4.4 Existing Network

4.4.1 Current Network equipment

In the current network we have the following devices with serve the campus:

ü 2 HP Switches in the sever room

ü 1 HP switch in library

ü 1 PH switch in law school

ü 3 Linksys (Cisco) WRT300N wireless router (AC-AP)

4.4.2 Physical configuration state

Under physical we have the following;

ü Locate in 6 building (LB, Academics, BLD, ACE, Library and Directors office).

ü LAN cable in both offices is CAT6 Ethernet.

ü Flat network without redundancy.

ü The current network is inadequate for growth.

ü 1 configured VLAN management.

ü Addressing and Naming are inconstancy and poorly.

ü 25 PCs connected via wireless router (AC-AP) in library

The figure bellow shows the physical configuration state

Figure 4.1: JKUAT Karen network building

Figure 4.2: physical network building

Note: connect cable used in the current network are;

1. Between switch to switch we have UTP cable (crossover cable)

2. Between core switch and normal switches we have Fiber optic cable.

Physical network design involves the selection of LAN and WAN technologies for campus and enterprise network designs. Physical Network Design,» is to give you information about the scalability, performance, affordability, and manageability characteristics of typical options, to help you make the right selections for your particular customer. The cabling that connects buildings is exposed to more physical hazards than the cabling within buildings. Fig 4 shows how different switches connect from different building to the core switch.

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