TCP/IPNetworks程序辅导讲解、讲解Networks 设计，报告

Networks and Systems Administration

COM2057 Networks and Systems Administration ICA 2

Upgrading the Local Area Network of a Bank

NOTE: This ICA counts toward 70% of your overall marks.

1 INTRODUCTION

HSBC BANK uses one office location in London with multiple floors. The

networks in these locations are in urgent need of replacement. It no longer

meets the stringent demands for availability and performance required for

today’s banks. All hardware and cabling requires updating along with the

design. We are looking for a solution that will not only meet current needs but

will continue to deliver a service level that meets our needs for the

foreseeable future.

Project Goals and Objectives

Key goals and objectives for the new network(s) include: -

 High performance

 High availability

Manageability, a network that will be cost effective to run and provide a lower

Total Cost of Ownership (TCO) than our current network.

Purpose of this project

This project lays out in detail the requirements for the new network(s) - this

includes any constraints and limitations.

2 BACKGROUND

Institution's Background

HSBC BANK is one of the leading financial institutions in the UK today. They

provide financial services for a wide range of British businesses and

industries.

Technical Environment

Our technical environment is as follows: -

 Currently running with Windows Vista on the desktop

 Servers are a mix of Windows and Linux

 Using TCP/IP – currently using IPv4

 Networks details are as follows:

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o Using old Layer 2 switches, and router.

o OSPF or EIGRP for internal routing

o ISDN for Internet connection

Current Business System

Business systems that the current bank network supports are:

 Email and Web applications

 Banking software system

 Financial system

 Payroll

 Purchasing

 Office applications

NOTE: Assumptions can be made on the current costs of the network and

what it contains.

3 SCOPE OF THE SYSTEM

The scope of this project is limited to the banking office location in London

with 6 floors. This includes the network services to bank itself as well as

services to the support office which must provide all services listed in section

above.

The bank in London will support 80 officers. There are 10 support staff and a

senior management team of 5. There are 20 networked printers that are used.

The bank houses 5 servers of different kinds (for email, web, file storage,

database and domain server). The bank and support services operate during

core hours of 9 am to 6 pm physically and also support online access and

services for 24 hours, except for maintenance periods.

4 KEY REQUIREMENTS

o Performance

o All banking floor transactions must complete in less than 1ms

o All supporting transactions must complete in less than 5ms

o Availability (on a monthly basis)

o Banking availability must be 99.999%

o Support services availability must be 99%

o Security

o Secure external link to the Internet

o Secure connection for remote workers

o Internal security mechanisms, including access controls

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o Cost effective

o Overall TCO lower than current TCO (assumptions can be made)

o Manageable services that will reduce power usage and

maintenance requirements

5 FUNCTIONAL REQUIREMENTS

We require a new network that will meet the key requirements outlined in

Section 4. The network will handle all of the data traffic from banking officers

themselves and it must be handled with high performance and availability

requirements. The requirements for all other traffic are less rigorous.

o The new networks must continue to provide this level of service for a

minimum of 5 years, and so must be designed with this in mind.

o The network must provide a cost effective solution showing a simple

costing table.

6 TECHNICAL REQUIREMENTS

Technical requirements are as follows:

o IPv4 Protocol and subnetting can be used. You can choose your own

Class C IPv4 address. VLSM (Variable Length Subnet Mask) subnetting

should be done showing optimal IP address allocation. A subnetting table

should be shown.

o Ethernet (IEEE 802.3) is required. VLAN designs on switches can be

implemented. STP (Spanning Tree Protocol) with switches can be

implemented

o Backup and restore functionalities and options for disaster recovery.

Optional: Off-site (single or multiple) network option for backup can be

shown on another site or multiple sites. Routing protocols like OSPF,

RIPv2, EIGRP or alternative internal routing protocol can be used to

connect the multiples sites or you can use static routes.

o Security - Internal security measures must be explained and a

Firewall/IDS/IPS is required

o A good internet connection (possibly with fibre optic technology or ADSL)

o A detailed network design diagram must be provided showing all the

subnets within the LAN and connection to Internet and possibly an

optional remote backup site.

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7 POILICY REQUIREMENTS

Based on the scenario outlined, you should produce a brief policy section in

the report that will address backup, disaster recovery and ethical and

professional issues involved in the administration and management of a Local

Area Network.

 The storage and disaster recovery policy will include:

o Availability management

o Server backup and restore measures

o Disaster Recovery and Business Continuity.

NOTE: Good business continuity plans will keep a company up and running

through interruptions of any kind: power failures, IT system crashes, viruses,

natural disasters etc.

 The ethical and professional issues policy of a LAN will include:

o Software piracy

o Licensing issues

8 IMPLEMENTATION REQUIREMENTS

The detailed network design and how the network will be implemented in

detail are required.

 You can use network simulation tools like Riverbed Modeler Academic

Edition/Packet Tracer or similar tools to model the network.

 You can use the simulation tools to simulate part or whole of the

network and to show the different performance aspects of the network.

You can choose to show the network as a whole OR network segments

(or functionalities) of it in operation – showing the efficiency of the

design and protocols used.

 We expect you to justify the use of any protocol or technology.

 Your simulation outputs can be like performance graphs (of throughput,

delay, packet loss, response time etc.)

 Through the simulation output, your job is to convince the HSBC BANK

about your efficient design and implementation that you can offer.

9 REPORT

Your report can be of maximum 3000 words (slightly flexible) on the

requirements listed (under section 4, 5, 6 and 7).

Apart from the introduction section in the report, it is suggestive to have

sections on network analysis (having details of what needs to be done with

your assumptions etc.), network design (having details of topology diagrams

using simulation tool or MS Visio) and network implementation (having

details of using simulation tool with output graphs), along with any other

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needed information. The last section of your report can be your policy

requirements.

Referencing can be added as needed. Use appropriate assumptions when

network information is not provided.

10 APPENDICES (Optional)

Any other details which you think should help your ICA submission can be

added here. This will not be included in the word count.

NOTES ON RIVERBED MODELER AND PACKET TRACER:

(a) If you are using Riverbed Modeler Academic Edition (free software) there will

be a limitation of 80 total nodes in your network with less than 20 core

nodes. If you have more than that, the simulation will not produce results. So

in that case I suggest the following:

Create TWO scenarios.

 In the first scenario, design a LAN topology with all the necessary

number of nodes as in the ICA, but don’t run the simulation, as it

won’t run with so many nodes. You can use the screen shots of your

design from this scenario.

 In the second scenario (by duplicating first), design the LAN to have

less number of actual computer nodes and run the simulation of a

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“representative LAN”. Or better use can use LAN model from Object

Palette and set the number the nodes to what you need (say 60 or

100 etc.; right click and find the option through “Edit Attributes”). See

the figure below. You can get output graphs through this scenario and

use it in the report.

NOTE: From the Riverbed official website: “Limited maximum number

of total nodes (80), Mobile nodes (20), Core nodes (20), and events (50

Million) in a simulation run. (Note: Core nodes are wired devices

connected to at least two other devices in the network)”. Source:

https://goo.gl/CcMFXB

(b) If you are using Packet Tracer and there will be no such limitations, but the

graph generation may not be as good as Riverbed Modeler – but there are

other ways to show that your design works through successful ping, showing

delay values etc.

MARKING SCHEME

1. Overall Report Presentation (20 marks)

 Word count can be 3000 words (max, slightly flexible)

 Report should cover analysis, design and implementation of the network

 Design and/or develop an appropriate product with clear justification decisions

 Demonstrate good ability to write a technical report

 Content covers the allocated project work and all the technical requirements

 Layout, structure, grammar, spelling, diagrams, references, etc.

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 Project requirements are defined to a professional standard.

 Demonstrate and adopt suitable simulation tools – OPNET/Riverbed, Packet Tracer or similar tools

etc.

14+ marks  Very thorough analysis, design and implementation of the network presented.

 Professional quality. Style is fluent.

 Report is concise and conforms to high standards.

 Provided a thorough and detailed insight into project.

 Good introduction to standards, methodology and processes undertaken for the project

 Very good referencing in the right format

11-12 marks  Good analysis, design and implementation of the network presented.

 Professional quality. Style is reasonably fluent.

 Report is concise and conforms to accepted reasonable standards.

 Provided a reasonable insight in to project. Project expanded and reasonably explored

 Reasonable introduction to standards, methodology and processes undertaken for the

project

 Good referencing in the right format

7-8 marks

 Average analysis, design and implementation of the network presented.

 Presentation and style acceptable.

 Generally clear and consistent layout.

 Minor errors and lacks some depth.

 Some depth of understanding but lacks any real insight. Useful for self-development.

 Basic insight in to project details.

 Reasonable introduction to standards, methodology and processes but lack some

insight.

 Average referencing with poor format

0-6 marks  Incomplete.

 No attempt to follow any guidelines.

 Some major deviations from accepted standards.

 Incomplete or no referencing.

 No attempt to follow any guidelines.

 Some major deviations from accepted standards.

2. Network Analysis (10 marks)

 Demonstrate the ability to develop an analysis specification for network done

 Use appropriate assumption, when information is not provided

 Define detailed project deliverables

 Outline and present a blueprint or model of the required system

 Must specify "What is needed."

7+ marks  Appropriate network analysis plan followed to a high standard.

 Hi-Level systematic and creative analysis adopted.

 Must demonstrate detailed network development requirements of a fully functional

system

6 marks  Appropriate network analysis plan followed to an above reasonable standard.

 Reasonable systematic and creative analysis.

 Must demonstrate detailed network development requirements of major functional of

the system

 Accurate and consistent analysis for main system functions.

 However some areas of the system have not been fully considered

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5 marks  Appropriate network analysis plan followed to a reasonable standard.

 Accurate and consistent analysis and design for some of the main system functions.

 Evidence of a reasoned system model

 However some areas of the system have not been considered

4 marks  Techniques are relevant but some minor inconsistencies and system model not fully

explored.

 Thorough but not succinct.

 Evidence of a basic system model

 Analysis partially complete.

 Must demonstrate basic level of system requirements

0-3 marks  Misapplication or several serious inconsistencies in analysis or design.

 Poor analysis and requirement elicitation

 No use of appropriate techniques and no rigour.

 - Investigation is flawed and is generally poor

3. Network Design (10 marks)

 Demonstrate the ability to develop a network design specification.

 Define how the detailed project deliverables are to be achieved.

 Demonstrate use of appropriate simulation tools and techniques in design.

 Identify HOW the ‘what’ from analysis it is to be achieved.

 Specify design of proposed system.

 Must specify “How it is to be achieved”

 Brief discussion on policy requirements

7+ marks  Appropriate network design and development plan followed to a high standard.

 High quality design or topology diagrams with amplification of different sections

 Good use of appropriate simulation tools and techniques used to develop the design of

the model identified in analysis.

 Analysis to design is very consistent.

6 marks  Appropriate network design and development followed to a reasonable standard.

 Good design or topology diagrams with amplification of few sections

 Reasonable use of appropriate simulation tools and Techniques used to develop the

design of the model identified in analysis.

 Analysis to design is consistent.

5 marks  Relevant use of simulation tools and techniques to develop system model.

 Average quality design or topology diagrams

 Accurate and consistent analysis and design for main system functions.

 However some areas of the system have not been fully modelled

4 marks  Techniques are relevant but some minor inconsistencies and system model not fully

explored.

 Below average design or topology diagrams

 Thorough but not succinct.

 Evidence of a reasoned system model

0-3 marks  Misapplication or several serious inconsistencies in analysis or design.

 Analysis and design poor.

 Poor or no design diagrams.

 No use of appropriate techniques and no rigour.

 Investigation is flawed and is generally poor

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4. Network Implementation (10 marks)

 Demonstrate implementation through OPNET/Riverbed or Packet Tracer simulation and output

performance graphs/screen shots

 Convincing evidence that the network designed works through output graphs/tables.

 Detailed discussion on policy requirements and its implementation

 Costing table provided

7+ marks  Appropriate implementation using simulation to a high detailed standard.

 Detailed outputs provided to cover a fully functional system

 A professional implemented system developed in the timescale allotted

 A professional approach to policy documentation

 A very good costing table provided

6 marks  Appropriate implementation using simulation covering main features to a reasonable

standard.

 Detailed outputs provided to cover a major system functions

 A implemented system covering major requirements developed in the timescale allotted

 A good approach to policy documentation

 A good costing table provided

5 marks  Appropriate implementation using simulation covering some major features to a

reasonable standard.

 Reasonable outputs provided to cover a some main system functions

 A implemented system covering main requirements developed in the timescale allotted

 An average approach to policy documentation

 An average costing table provided

4 marks  Techniques are relevant but some minor inconsistencies and system implementation

not fully explored.

 Thorough but not succinct.

 Evidence of a reasoned system model in the timescale allotted

 A lacking approach to policy documentation

 A poor costing table provided

0-3 marks  Misapplication or several serious inconsistencies and is weak thought-out the

implemented system.

 No use of appropriate techniques and no rigour.

 Investigation is flawed and is generally poor

 A very poor approach to policy documentation or none of it

 No costing table provided

Marking Criteria

90%-100%

• Exceptional work with presentation of a very high standard for the logical design and the report

• There is coherence of ideas and demonstration of a thorough knowledge and

understanding of network infrastructure, security, ethical and legal issues supported

by wide reading with very effective use of source material, costing table and accurate referencing

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80%-89%

• Outstanding work with presentation of a very high standard for the logical design and the report

• There is coherence of ideas and demonstration of a thorough knowledge and

understanding of network infrastructure, security, ethical and legal issues supported

by wide reading with effective use of source material, costing table and accurate referencing

70%-79%

• Extremely good work with presentation of a high standard for the logical design and the report

• There is coherence of ideas and demonstration of thorough knowledge and

understanding of network infrastructure, security, ethical and legal issues supported by reading

with use of source material, costing table and accurate referencing

60%-69%

• The work is well presented and coherently structured for the logical design and the report

• There is evidence of a sound knowledge and understanding of network

infrastructure, security, ethical and legal issues and costing table. Most material used has

been referenced / acknowledged

50%-59%

• Presentation is acceptable but with some errors

• There is knowledge and understanding of network infrastructure, security, ethical and legal issues.

• Some use of relevant source material

40%-49%

• Presentation is acceptable but attention to structure and style is required. The content is

relevant but largely descriptive

• There is evidence of a reasonable level of knowledge and understanding but there is limited use

of source material to support the design

30%-39% – Fail

• The work is poorly structured and presented

• Some material is irrelevant. Content is based largely on taught elements with very little

evidence of reading around the topic

29% and below – Fail

• The work is very poorly structured and presented. Much material is irrelevant

• Content is based almost entirely on taught elements with very little evidence of any purposeful

reading around the topic