You have been hired by a reputable mining company in Ghana to design and implement their enterprise network infrastructure. The company$$s operation centres are located at Takwa Nsuta, Takoradi port and Accra. The mining activities is centred at Takwa Nsuta as the key operation centre with work force number up to $5000.$ The two branch offices in Accra and Takoradi Port houses only few administrative staff numbering not more than $20$ each.

The Takwa Nsuta site contains $4$ buildings; Administration Block, Mining Engineering Block, Environmental Block and Workshop Block. The Network Operations Centre and the Server Farm are located at the basement of the Administration Block. The distances between the Admin Block and the other buildings have been found to be not less $400$meters. You have been inform by the IT Manager that the equipment listed below have been procured for the project. For a start, each block at Nsuta will house $3$ daisy$-$chained $2960$ series switches. You have also been provided with the DLCI numbers and IP address received from the ISP for site$-$to$-$site interconnections over frame$-$relay WAN switching technology.

The LANs at Accra and Takoradi Port branches are not to be segmented since the number of users are not more than $20.$ Each of the sites will have $1$ of the $2960$ series switches.

Table $1.$ Network equipment provided

Device Model Qty$.$ Remarks

Router ISR$43213$ To be used for inter$-$branch connectivity over frame$-$relay

Multilayer Switch $365024$PS $1$ Core switch to be installed at Nsuta NOC to provide inter$-$vlan routing among the configured VLANs

L$2$ Switch $2960100$

DHCP Server Server $1$ To provide DHCP services at Nsuta LAN

Cable Fibre $10$ Boxes To be used for connect inter$-$block backbone connections

Cable UTP Cat$610$ Boxes To be used as access cables for users

Cable Serial Cables $10$ Boxes To be used for WAN connection over frame$-$relay

Table $2.$ ISP Information for WAN access

Location DLCI

Takwa Nsuta, $100,101$

Takoradi port $200,201$

Accra $300,301$

Network Access Address $10\mathrm{.}2\mathrm{.}2\mathrm{.}0/24$

Table $3.$ VLANs to be implemented at Takwa$-$Nsuta

Vlan Number Vlan Name Expected No$.$ of computers to be deployed Access Ports for each switch

$100$ Mining Engineers $8,100$ First $10$

$200$ Administrative Staff $4,050$ Next $5$

$300$ Environmental Scientist $2,100$ Next $5$

$400$ Biometric Time and Attendance Machine $16,009$ Next $2$

$500$ Managers $1,000$ Next $1$

$600$ Wifi Users $500$ Next $1$

a$)$ Use cisco packet tracer $7\mathrm{.}2\mathrm{.}2$ to design and implement the network physical topology connecting all the branches together over a frame$-$relay technology $[$Note: Using the appropriate cable type for each connection will attract more marks$].$

$[10$ Mark$]$

b$)$ You are required to secure all the Routers and Switches and allow SSH remote log on to them for management. $[$Note: all passwords used in the network should be cisco, and use the network address $192\mathrm{.}168\mathrm{.}20\mathrm{.}0/24$ to assign IP addresses to switches$].$

$[8$ Marks$]$

c$)$ Use the information provided in Table $2$ to configure serial links over frame$-$relay. Use sub$-$interfaces to avoid split$-$horizon problem. Use VLSM to efficiently distribute the network address provided.

$[10$ Marks$]$

d$)$ The multilayer switch at Nsuta should be configured as the VTP server of the switched network with VLANs indicated in the Table $3.$ Use the VTP information $($VTP domain name $=$ cisco and VTP password $=$ cisco$)$ to complete the configuration of your all the switches at Nsuta. Configure the access ports for each switch as indicated Table $3.$

$[10$ Marks$]$

e$)$ Configure the multilayer switch to allow inter$-$vlan routing among the VLANs.

$[6$ Marks$]$

f$)$ Define DHCP pools for all the VLANs in the DHCP server to allow automatic IP address allocations to users.

$[6$ Marks$]$

g$)$ Configure all the routers at the branches to operate with OSPF and advertise the appropriate networks.