|Assessment Details and Submission Guidelines|
|Unit Title||Advanced Network Design|
|Assessment Type||An individual written report and group demonstration – Assignment 2|
|Assessment Title||Network requirement analysis, plan and design|
|Purpose of the assessment (with ULO Mapping)||This assignment is designed to assess students’ knowledge and skills related to the following learning outcomes:|
|Weight||15% of the total assessments|
|Word limit||1200 – 1500|
Project Scope: A case study for Barranquilla Plaza Hotel is considered. The link for the case study referring to Barranquilla Plaza Hotel can be found in the Appendix.
The summary of the case study is that the hotel’s Wireless Access service was poor and had issues, such as dropped connections, dead zones and insufficient capacity. A wireless solution was provided (refer to the case study for further details) which was received very well by the customers. As a result, the overall experience of the customers improved remarkably.
Provided 5 different departments of the hotel, guest rooms, multiple restaurants, pool area, reception area and a bar, a generic network layout diagram of the hotel is presented below for illustrative purposes only.
Assignment Requirement: Provided the advantages of a layered approach (core, distribution and access), the hotel considers redesigning its network adopting a layered approach. The new network design requirements are a) three-layered network design (core, distribution and access) b) redundancy required in the core layer.
Gathering information about the existing network (such as IP addressing scheme, traffic restriction policies, applications used etc.) is paramount for any network redesign for a seamless transition. In this regard, the staff members and IT staffs can be invaluable sources of information. A carefully designed questionnaire can be instrumental in gathering information.
Part I: Information collection
Develop a questionnaire to gather requirements from staff members, IT members and management. The followings are to be covered in this section.
For real-time traffic, bandwidth percentage should be set to 70 of the available bandwidth. For FTP traffic, bandwidth should be set 200 kbps.
For SMTP traffic, bandwidth should be set to 800 kbps.
Note that traffic information is important and will be used for QoS. QoS reflects on the performance evaluation of the design.
Part II: Network redesign and Demonstration
This is a network redesign and demonstration section. The following are to be covered.
For demonstration, the format would be a) no more than 2 persons in a group, b) at least 3 viva voce questions related to the design, and c) demo and viva voce duration 5 – 7 mins (at max). The following is to be covered.
Note to the lab tutor: As per the need, the lab tutor can allocate 15 mins in Week 9 and Week 10 for work progression check and consultation.
Develop a questionnaire to gather requirements from staff members, IT members and management.
QoS is the technology framework which helps in the management of data traffic and helps to reduce the packet loss, latency and Jitter on the networks. It helps in controlling and managing the network resource with the help of priorities and specific types of data on the network. Usually the organizations networks are able to provide and predict the application service level such as voice, video or transferring of any sensitive data over the network. There are different tools and techniques such as jitter buffer or traffic shaping. It is the part of network maintenance to provide the certain level of performances in the network. To measure the QoS, following quantitatively parameters has been analyzed to measure the network performance (Lymberopoulos) Packet Loss
MOS is the measurement, which rates the voice quality, the voice quality is appraised over the size of 5 distinct focuses, which aides in recognizable proof of most astounding quality.
The implementation of QoS has usually three different models
The model of Best Effort, in QoS model helps all the packets, to make sure that every packet receives the same guarantee of the delivery and same priority. Best Effort makes sure that every packet should receive by the sender. The strategy of Best Effort is applied on the networks where infrastructure supports the QoS policies.
Integrated service known as IntServ, is one of the QoS model which receives the bandwidth with the specific path on the network. Applications from the network ask for the resource reservation and different network devices which monitors the flow of traffic among the network. The intServ implementation requires different Int-Serv capable routers which implements the Resource Reservation protocol (RVSP) to manage the network resource reservation. It usually has limited scalability and high consumption of the network resource.
The network design is specifically design for the core, distribution , access layers in which the connectivity can be more appropriate at organizational level because the user’s accessibility should be optimized while making the proper data transmission.
Validate and verify:
The QoS configuration are observed using some 3rd party tools, which helps in the analysis of graphs and DSCP marking of the data transfer and bandwidth utilization, if any unusual thing is observed it ll be listed for the further investigation but in case if it doesn’t, then file transfer mechanism has been observed among the two different machines to test the server cycles, latency period etc. the speed has been observed, the set speed limit is the 200 kbps for the file transfer from machine A to machine B. if the speed limit is not achieve then the QoS needs to be trouble shoot. The validation of the QoS is tested over the specified speed for FTP as well as for SMTP. The network ahs been with the standard of QoS to ensure the performance is up to the mark.