The University has recently leased a building in Delphi, Maryland to house offices, classrooms, library, and computer labs. The goal of this proposal is to design a network for these facilities. The Student computers are to be on a separate network from the staff computers. The facility will share one Internet connection (T-1 link from Verizon). With a T-1 link the network will be able to function with the speed of 1. 544 Mbps over 24 channels each running 64 Kbps (Labels). Security Is always a big concern and has been taken into consideration.
Additional considerations for each lour/classroom/lab/office include printing capabilities and the Wife (Wireless Access) in the Student Lobby. The network design plan requested by COMIC for the newly acquired building in Delphi, Maryland is required to deliver an IP addressing scheme for efficient IT administration and also allow for scalability for future expansion. The use of subletting or breaking the network down into smaller subnets, will minimize the broadcast traffic that each network node must process and also increase the performance of the network.
For the network Infrastructure devices including witches, servers, router, and printers, a static IP address should be selected by the network administrator. The subnets that were chosen for the network proposal are broken down Into five different subnets. One being used for the six Instructional computer labs, one for the student computer lab, one for the six different offices, one by COMIC of 10. 11. 0. 0 is a class A network address that will be used in creating six total subnets for the network. The IP address ranges for the different subnets being used on this network are proposed below.
After reviewing the Universities requirements it is apparent that the Staff and Student networks require separation and for this the use of Plans or virtual local area networks will provide a way of structuring growth logically and also for the security between the students and staff. Even though the staff and students computers will be wired to the same switch the use of the separate Plans will allow big concern of the University, separating systems that have sensitive data such as the staff, from the rest of the network decreases the chances that the students will gain access to unauthorized data.
With the University also using different departments such as the lecture rooms, offices, library, and computer labs the use of Plans to separate these different departments is also suggested. In order to “create a PLAN using most switches simply by logging into the switch via Telnet and entering the parameters for the PLAN (name, domain and port assignments). After you have created the PLAN, any network segments connected to the assigned ports will become part of that PLAN. While you can have more than one PLAN on a switch, they cannot communicate directly with one another on that switch.
If they could, it would defeat the purpose of having a PLAN, which is to isolate a part of the network (Tyson 1). ” Different Plans will be implemented to separate each subnet and to separate broadcast traffic. Physical Network design has been evaluated; I propose a combination of Tree topologies and Star/Mesh topologies. This configuration will meet all the business requirements for the defined two-story building. Since every computer is going to be connected to a centralized node which usually are hubs or switches the topology can be defined as a star topology.
The network design layout or the Delphi building each node is going to be connected to a switch instead of using hubs. The advantage of using the star topology over bus and ring topologies is that each node is going to be connected to the switch with its own Cat cable. So in the event that one of the nodes goes down and is not functioning it’s not going to take down the rest of the nodes on the network. Whereas in a ring or bus topology each node is connected to each other and transmits data to each residing node, so if one node goes down then it can take down the entire network.
The only equidistant of the star topology is that if the switch goes down for some reason then all the nodes attached to the switch will not work. Using switches in the star topology can be an easy way to troubleshoot any network problems. If all the nodes on the network go down then you usually know that the problem is going to be with the switch and none of the nodes. For the most cost effective solution for wiring the building combined with high performance networking the use of Cat STEP (Shielded Twisted Pair) cabling is suggested. The dimensions of the building require the cable runs to exceed 240 feet.
Using Cat Ethernet selection will allow this requirement to be met. The media that was selected is Ethernet Cat cabling since the Delphi Buildings length dimension is 240 feet. When used for 10/100/1 BAOBABS-T, the maximum allowed length of a Cat 6 cable is 100 meters or 328 feet, so using the Cat 6 cabling will allow for some extra feet for going around walls and into ceilings to be able to reach the various rooms (Wisped, 2014). Also using STEP Cat-6 or shielded twisted pair cabling features more stringent specifications for crosstalk and system noise usually created by MI or electromagnetic interference (Quintuple). The Cat
STEP will also physically be wired as a star topology where each computer node is wired with its own Ethernet cable to the centralized switch. Estimating the cable length needed has many variables; actual measurement of the rooms, available space in either the floors or ceilings, how the computers and devices will be placed in the room, etc. I have made an estimate allowing for extra cable in case of possible on the two floors. Rooms 1st Floor Estimate of Size of Room in feet Rooms 2nd Floor Server Room 12 Lecture Classroom 1 Lab Classroom 1 Lecture Classroom 2 Lab Classroom 2 Office 1 Lecture Classroom 3 Lab Classroom 3 Lecture Classroom 5
Lab Classroom 5 Office 3 (IT) 15 Office 2 Lecture Classroom 4 Lab Classroom 4 82 Student Lab Office 4 (Dean) Office 5 (Admission) Lab Classrooms Estimates of the cable lengths are taken from the Patch Panel into the longest part of each room. Rooms 1st Floor Estimated cable needed in feet Nodes 52 120 132 172 240 110 178 Library * 960 staff 2600 students 5 11 275 1470 10% added 632 Totals 1st Floor 6953 *Assuming separate cables for all lines into the Library Estimates are from the Server Room Patch Panel to either the room or the Lab Patch Panel and then into the longest part of each room.
Rooms 2nd Floor 800 students 40 staff 20 360 students 68 staff 800 Students 1240 31 Office 3 Cable between floors 801 Total 2nd Floor 8816 160 The network devices to be used in the building should provide the highest level of reliability, longevity, and performance and for that the recommendation is Cisco network equipment. To determine the correct network media to use the following table below shows the data points for each of the rooms on the 1st and 2nd floor. SST Floor Room Staff Connections Printers Student Connections Total Data Points 10 16 6 Total Data Points: 30 2nd Floor Printer Server Computer Lab 1 Computer Lab 2 Computer Lab 3 Computer Lab 4 Office 2 (HRS) Computer Lab 5 Office 3 (Faculty) Computer Lab 6 21 Total Data Points: 160 After determining the amount of data points for each of the floors helps in deciding which Cisco equipment would be the right fit for each floor.
Using Cisco SLALOMS 48-port gigabit smart switches are ideal for this network design (Cisco). The Cisco SLALOMS offers 48 10/100/1000 Gigabit over copper ports with two shared copper or optical small form-factor pluggable uplink interfaces for connecting the switch to the core network (Cisco). The Rapid Spanning Tree Protocol or REST will need to be configure on all of the switches so that broadcast storms do not occur ND also prevent network loops.
Since there is only 30 data links required for the 1st floor, one Cisco SLALOMS 48 port switch should be sufficient and should be installed into the Server room on the first floor along with the corresponding patch panels. From the server room each of the rooms will be wired from each of the nodes in the offices and lecture rooms to the switch using Cat cabling. None of these wired connections should exceed aft so the use of Cat cabling should be sufficient. The second floor will need for 160 ports total to fulfill the requirements needed.
The needed amount of switches for the second floor is going to be six. I would recommend putting a switch in each of the six computers labs on the second floor adding the switches to the server room found in every computer lab. The office #1 on the second floor can have its computer wired to either the server room in the computer lab #2 or computer lab#3 on the 2nd floor. The HRS office#2 will have its computers wired to the computer lab#5 server cl