The University has recently leased a building in Adelphi, Maryland. The building
ID: 665271 • Letter: T
Question
The University has recently leased a building in Adelphi, Maryland. The building will house some offices, classrooms, library, and computer labs.
Building dimensions: Length: 240 Feet, Width: 95 Feet, Height: 30 Feet
The 50-year-old two-story building has the following layout:
There will be six computer labs (in the building diagram above, these labs are the classroom with closet in them) that will be used for instruction. Each of these labs will have 22 computers (20 student computers and 1 instructor computer). Each of these labs will also have a server in the closet located inside the lab.
In addition to the six computer labs, there will also be a Student Computer Lab that will provide computer access to students to do their homework. There will be 30 computers in this lab and a server in the closet.
The library will also have some computers to allow students access to the library resources. There will be 10 computers for student’s use in the library, and 5 computers for Library staff.
There are five lecture classrooms in the building. Each of this room will have a computer for instructor’s use.
Finally, there are various offices in the building. Each of these offices will have one computer for staff use, with the exception of the Admission office that will have 5 computers for staff use.
Equipment Inventory
Number of
Computers
Users
Total Computers
6 Instructional
Computer labs
25ea
Student and
Faculty
150
Student Computer Lab
30
Student
30
6 various offices
6
Staff/Faculty
6
Admission office
5
Staff
5
Library
10
Student
10
Library
5
Staff
5
5 classrooms
1
Faculty
5
Upstairs Lobby WiFi
1 Students
To be determined by students
Downstairs Hallway Wifi
1 Students
1 Staff/Faculty
1 Guests
To be determined by students
Library WiFi
1 Students
1 Staff/Faculty
To be determined by students
Servers
Staff
To be determined by students
Network Security Devices
All
To be determined by students
Network Connecting Devices
IT Staff
To be determined by students
Printers
To be determined by student
Two server rooms have been allocated, one on the first floor and one on the second floor.
Your task is to design the network for this new building with the following criteria:
Student-accessed computers should be on separate network from the staff-accessed computers.
The whole building will share one Internet access connection (T-1 link from Verizon). This connection will come into the Server Room on the first floor.
Security is very important for UMUC as we have to protect students and employee’s data as well as any intellectual property that UMUC has on the servers and computers.
The network has been assigned the 10.10.0.0/16 network address for all computers and devices. For Internet routing use 150.1.1.1 IP address.
The network should use physical cable (not wireless), but do provide wireless access in the Student Lobby area on the second floor, and WiFi on the first floor as indicated above.
Submission should include (in no more than ten pages, excluding diagrams and references):
Network Addressing:
1.Define the subnet (based on: rooms, floor, department, or other criteria).
2.For each subnet, explain which devices/groups/users/rooms will be on this subnet, define the network address, subnet mask, and available IP addresses to be used by computers or devices.
Network Design:
1.Define the topology that will be used.
2.Select the appropriate network media to use.
3.Select the appropriate network connecting devices to use.
4.Physical layout of the computers on the floor plan.
5.List of additional servers, network devices, or network services needed to implement the network.
6.Justifications for your network design (number 1 – 5 above)
You will be evaluated on your ability to
Implement appropriate IP addressing scheme (LabSim 5.0)
select and justify appropriate cable media that includes the length of each cable segment and number of nodes on each segment (LabSim 2.0)
select and justify appropriate topology such as star, bus, or ring for your network (LabSim 1.0)
select and justify of your selected network equipments (LabSim 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0)
select and justify appropriate network services to meet network requirements (LabSim 5.0, 6.0, 7.0, 8.0, 9.0)
select and justify security implementation for the network (LabSim 8.0)
use proper grammar, formatting, network terminology, and reference citations
Number of
Computers
Users
Total Computers
6 Instructional
Computer labs
25ea
Student and
Faculty
150
Student Computer Lab
30
Student
30
6 various offices
6
Staff/Faculty
6
Admission office
5
Staff
5
Library
10
Student
10
Library
5
Staff
5
5 classrooms
1
Faculty
5
Upstairs Lobby WiFi
1 Students
To be determined by students
Downstairs Hallway Wifi
1 Students
1 Staff/Faculty
1 Guests
To be determined by students
Library WiFi
1 Students
1 Staff/Faculty
To be determined by students
Servers
Staff
To be determined by students
Network Security Devices
All
To be determined by students
Network Connecting Devices
IT Staff
To be determined by students
Printers
To be determined by student
Explanation / Answer
Hi
Let us start with defining subnets.
1) A network of /27 (10.10.1.0/27 )to be used by network devices ----->A management VLAN (Mgmt with the id 2 ) has to be defined . I wont recommend to use default VLAN (VLAN 1 is used by network protocols) for users & network devices. There are 30 IP addresses available for network device under Mgmt VLAN which starts from 10.10.1.1 to 10.10.10.1.30 . address 10.10.1.0 will be network address and address 10.10.1.31 will be broadcast address.
2) A network of /28 (10.10.2.0/28 )to be used by servers (It is always recommended to use diffrent VLAN for server zone)-----> A separate VLAN (SRV with VLAN id 3) to be used for servers.
10.10.2.0 will be network address. 10.10.2.15 will be broadcast address. There are 14 available address for servers. which starts from 10.10.2.1 to 10.10.2.14.
3)A network of /28 (10.10.3.0/28) to be used for printer . Printer VLAN with id 4 to be defined for printers. there are 14 available addresses for printers.
4)A network of /24 (10.10.4.0/24) to be used for wifi. WiFi VLAN with id 5 to be defined for printers. there are 254 available addresses for wifi users
5) A network of /24 (10.10.5.0/24) to be defined for students. A user VLAN STUDENT with VLAN id 6 to be defined for students.There are 254 available address for students.
6) A network of /24(10.10.5.0/24) to be defined for staff . A STAFF VLAN with id 7 to be defined for staff. There are 254 available address for users.
Note : VLAN id is used to tag the frames on trunk links.
Now the network Design parts.
1) Topology :
The T1 line will terminate on a firewall (using sonicwall TZ 215) . Two Firewall to be used in HA(high availability) one is primary & other one is back up.
A Core switch virtual chasis (using two Juniper EX 3300 24 ports each in virtual chasis) . Core switch will be used for DHCP services, Inter VLAN routing. All the VLAN to be defined in core switch . Each VLAN interface has to be L3-Interface ( routing enabled).
Six numbers of Juniper Ex2200 -48 ports switch to be used at access layers . users /servers will directly to be conncted to access switch. This switch will be treated like L2.
Juniper WLC8 to be used as controller with 4 Juniper wla522 Access points. WLC will directly be connected to core switch on ether channel (two interface will be used to provide link level redundancy). Access points will be connected directly to access switch on the floor server room.
The firewall , core switch & some access switch to be placed in first floor server room.
only access switches to be placed in second floor server room. All the access switch on second floor will be connected to core switch on first floor through dual link (two interface will be grouped in one under ether channel)
Then users work stations/servers.
2) Network Media : I am going to use cat6 cables. Consideing the dimension, cat6 will cater the need. It is 10Gigabit supported media over distance of 100 meters.
3)Network Connecting devices: I am going to use Sonicwall firewall TZ215 in HA (High availability) to get the hardware level redundancy .
A core Chassis of two Juniper Ex3300 24 ports switches. One is primary & other one will be seconday . Primary will be responsible of processing packets, network protocols, DHCP etc. Primary will act as routing engine.
Six numbers of juniper EX2200 of 48 ports to be used for access level where servers & desktop will directly be connected.These six will be distributed in first floor and secound floor servers room (depends on the user counts on floors).
A Juniper WLC8 to be used as controller & 4 numbers of Juniper WLA522 to be used 2 on each floor. to fulfill wifi needs.
4) Network cables requirement. each network devices & users workstation will be connected through cat6 cable . The length will be accordingly.
5) Services:
Core switch will be acting as DHCP server. Only STUDENT , STAFF & WiFi vlan will have DHCP scope. Rest ,like, SRV , management, Printer VLAN have static scope.
Firewall to be used for security purpose. Any kind of packet /content/category/application filtering will be done through this.
Core switch will have dual link connected to firewall one link each. This is to acheive link level redundancy.
We will be using Ether Channel to connect each access switches with core through LACP active mode. In this case interface speed will be double . both interface will be active at the same time and load balance the traffic in round robin manner . If one link goes down other one will carry the user data.
The connectvity will be like this
T1 line -->firewall-->core switch---->access switch--->users/servers. addition to that The WLC will be connected to core switch and access points with access switches.
Note : My answer is compact & reasonably short. I have consered all the requirements(devices & IP subnets )
Based on present scenario.
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