CSCI 211:

OBJECT-ORIENTED ANALYSIS AND DESIGN

 

 

 

PROJECT PROPOSAL

 

 

 

 

NETWORK MANAGEMENT SYSTEM

 

 

 

  by

Chandrasekhar Maddipatla

 

 

 

 

 

 

 

 

 

Contents:                                                                       page number

1.Background                                                                               03

2.Requirements Specification                                                       06

3.Use Case                                                                                     10        

4.CRC Cards                                                                                 13

5.Class Model                                                                               16                                        

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Network Management System

 

1. Background:

1.1 Definition:

Network Management Tool is a service that helps human network managers to monitor and maintain networks by employing various tools, applications, and devices. This project is based on the five major areas in the ISO Network Management Model. The following are the five areas:

1.      Performance Management

2.      Configuration Management

3.      Accounting Management

4.      Fault Management

5.      Security Management

1.1.1 Performance Management:

The primary goal of Performance Management is to make sure that the performance of the network is maintained at an acceptable level by measuring and making various aspects of performance available. The three steps involved in Performance Management are:

·        gather performance data on variables of interest

·        analyze the data collected to determine baseline levels

·        appropriate performance thresholds are determined for each important variable so that exceeding these thresholds indicates a network problem worthy of attention.

An alert is issued to the network management system when the performance threshold is exceeded. Proactive methods such as network simulation can be used to project the effects on performance metrics by the growth of the network.

1.1.2 Configuration Management:

There will always be a chance of different versions of hardware and software elements on the network. All of them need to be tracked and monitored for better performance of the network. Configuration Management accomplishes this. The configuration Management system tracks and manages the network by basically monitoring network and system configuration information and the effects on network operation of various versions of hardware and software components. Configuration Management subsystems store the version information in a database for access.  This database is searched for clues when a problem arises in the network. These clues, if appropriate can be used to solve the problem.

1.1.3 Accounting Management:

Individual or group uses on the network need to be regulated. Measuring the network-utilization parameters can do this. This is the task of Accounting Management of the ISO Network Management Model. This regulation minimizes the network problems and the access to the network is fair to all the users. The following are the steps involved in Accounting Management:

·        measuring the utilization of all important network resources

·        analyze the results to get insight into current usage patterns, and set usage quotas at this point

·        correction is needed to reach optimal access practices

·        ongoing measurement of resource use yields billing information, as well as information used to access continued fair and optimal resource utilization

1.1.4 Fault Management:

The primary goals of Fault Management is to detect, log, notify users of, and automatically fix network problems to keep the network running. Faults in the network cause downtime, unacceptable network degradation. For this reason Fault Management in the ISO Network Management Model is the most widely implemented element. It involves:

·        determining symptoms first and isolating the problem

·        fixing the problem and then the solution is tested on all-important subsystems

·        detection and resolution of the problem is recorded

1.1.5 Security Management:

            The primary goal of Security Management is to protect the network from illegal access so that sensitive information on the network is safe. Security Management subsystems

·        monitor users logging on to network resources, and refusing access to those who enter inappropriate access codes.

·        partition network resources into authorized and unauthorized areas. For users who are company outsiders access to any network resource is inappropriate. For internals access to information originating from a particular department is inappropriate.

·        try to identify sensitive network resources and determine mappings between sensitive network resources and user sets.

·        monitor access points to sensitive resources and keep track of inappropriate access to sensitive network resources.

The main aim of this project is to design a network management tool, which keeps track of the status of the various systems in the network, provide automatic solutions to any problems that arise, keep track of the traffic in the network, authorization of valid users and maintain record of resources. This project is developed with Object-Oriented Analysis and Design technique using UML.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Requirements Specification:

2.1 Overview Statement:

            The purpose of this project is to create a reliable Network Management System with least possibility of breakdowns and strong security features. This tool has many options, which can be used by the human administrator for better overall management of the network. This tool will be designed to deal with vast array of technologies, applications, and equipment used to manage networks of today and the networks of the future.

2.2 Customers:

            The possible customers for this system may range from a small work group to organizations with a large network.

2.3 Goals:

            The goals of the this project are as follows:

  1. To provide automatic network management with minimal human interference.

  2. To keep the performance of the network at very high levels.

  3. To control the network traffic.

  4. Network Security.

  5.Network resource management. 

  6.Detection and correction of network malfunctions (both hardware and software)

   7.Develop and Implement the system using Object-Oriented Analysis and design Technique.

2.4 System functions:

            The following are the five main functions of this Network Management System:

1.      Performance Management

2.      Configuration Management

3.      Accounting Management

4.      Fault Management

5.      Security Management

2.4.1 Performance Management Functions:

Ref#	Function	Category
R 1.1	Calculation of bytes/packets transferred	Hidden/Evident
R 1.2	Calculation of performance threshold	Hidden/Evident
R 1.3	Calculation of response time	Hidden/Evident
R 1.4	Calculation of delay	Hidden/Evident

Note: Evident for the network administrator and Hidden for the network user.

 

2.4.2 Configuration Management Functions:

Ref#	Function	Category
R 2.1	Keeping track of software version and name	Hidden/Evident
R 2.2	Keeping track of hardware version and name	Hidden/Evident

Note: Evident for the network administrator and Hidden for the network user.

 

2.4.3 Account Management Functions:

Ref#	Function	Category
R 3.1	Computation of resource usage time	Hidden/Evident
R 3.2	Keeping track of the user of a particular resource	Hidden/Evident

Note: Evident for the network administrator and Hidden for the network user.

 

2.4.4 Fault Management Functions:

Ref#	Function	Category
R 4.1	Servicing of software error	Hidden/Evident
R 4.2	Servicing of hardware error	Hidden/Evident

Note: Evident for the network administrator and Hidden for the network user.

2.4.5 Security Management Functions:

Ref#	Function	Category
R 5.1	Authorization of user onto the network	Hidden/Evident
R 5.2	Authorization of Network Administrator	Hidden
R 5.3	Authorization of users to special areas of network	Hidden/Evident

Note: 1. R 5.1 & R 5.3: Evident for the network administrator and Hidden for the network user.

2. R 5.2: Hidden for both user and network administrator.

 

2.5 System Attributes:

            The following are the five types of attributes of this Network Management System:

1.      Performance Management Attributes

2.      Configuration Management Attributes

3.      Accounting Management Attributes

4.      Fault Management Attributes

5.      Security Management Attributes

 

2.5.1 Performance Management Attributes:

Attribute	Details
bytes/packets transferred	Number of bytes/packets transferred across the network in a given period of time or at a point of time
Delay	Time delay in transfer of information between two nodes of the network
response time	Time between sending and reception of a request between two nodes of the network
performance threshold	Limit set on network performance over which the network becomes unstable

 

 

2.5.2 Configuration Management Attributes:

Attribute	Details
software version number	Version number of different software elements in the network
hardware version number	Version number of different hardware elements in the network
software name	Names of different software elements in the network
hardware name	Names of different software elements in the network

 

2.5.3 Accounting Management Attributes:

Attribute	Details
resource name	Type of resource being used by a user
resource usage time	Usage time of the particular resource by a user
User	User who is using the resource

 

2.5.4 Fault Management Attributes:

Attribute	Details
hardware error	To isolate the hardware error and the type of hardware error
software error	To isolate the software error and the type of software error

 

2.5.5 Security Management Attributes:

Attribute	Details
User login name	Login name of the user used to log on to the network
Admin login name	Login name of the administrator used to logon to network
User password	Password o the user
Admin password	Password of the administrator
Special access permission	Attribute to check whether or not a user is authorized to access special resources of the network

 

 

 

 

 

 

 

 

 

 

 

 

 

3.2 Login/Authorization:

Use case:          Login/Authorization

Actors:             User, Administrator

Type:                Primary and essential

Description:

 A user logs on to the network by supplying his login name and password. The network administrator also logs on to the system by supplying a login name and password.  If login is successful the user or the administrator works on the network. Access of special resource on the network is given only to a few privileged users. 

 

3.3 Resource Management:

Use case:          Resource Management

Actors:             User, Administrator

Type:                Primary

Description:

A user uses a network resource. The usage time is calculated and if the user is blocking other users from using the network resources, he is alerted and the administrator takes necessary action so that other users are not deprived of the network resources.

 

3.4 Performance Management:

Use case:          Performance Management

Actors:             Administrator

Type:                Primary

Description:

Performance metrics of the network such as throughput are calculated using many attributes of the network. If the performance threshold exceeds a set limit, the network becomes unstable. The Administrator takes necessary steps to bring back the threshold to normal level.

 

3.5 Configuration Management:

Use case:          Configuration Management

Actors:             Administrator

Type:                secondary

Description:

When new software or a hardware component is added to the network, it’s name and version number need to be stored to distinguish it from its predecessors. These details are used to isolate any problem that arises in the network.

 

3.6 Fault Management:

Use case:          Fault Management

Actors:             Administrator

Type:                Primary

Description:

When the network is malfunctions, the administrator corrects the identified software or hardware error. After this the network works as it used to before the occurrence of the malfunction.

 

 

3.7 Database Control:

Use case:          Database Control

Actors:             Database

Type:                Primary

Description:

The database returns the requested data to the appropriate class.  The database has all the data needed for a network to run smoothly. Database stores login names and corresponding passwords of users and administrators. It also stores configuration details, fault management details, account management details and performance management details.

 

 

 

 

 

 

 

 

 

 

 

4.Class Responsibility and Collaboration Cards:

 

4.1 “performMgmt” class:

performMgmt
Responsibilities	Collaborators
Calculation of bytes/packets transferred	databaseControl
Calculation of performance threshold	accountMgmt
Calculation of response time
Calculation of delay

 

 

 

4.2 “faultMgmt” class:

faultMgmt
Responsibilities	Collaborators
Servicing of software error	configMgmt
Servicing of hardware error	accountMgmt
	databaseControl

 

 

 

 

 

4.3 “databaseControl” class:

databaseControl
Responsibilities	Collaborators
Service various requests from other classes by returning the requested data	configMgmt
	performMgmt
	securityMgmt
	faultMgmt
	accountMgmt

 

 

 

4.4 “accountMgmt” class:

accountMgmt
Responsibilities	Collaborators
Computation of resource usage time	databaseControl
Keeping track of a user of a particular resource	performMgmt
	faultMgmt
	securityMgmt

 

 

 

4.5 “securityMgmt” class:

securityMgmt
Responsibilities	Collaborators
Authorization of user onto the network	databaseControl
Authorization of Network Administrator	accountMgmt
Authorization of users to special areas of network

 

 

 

4.6 “configMgmt” class:

configMgmt
Responsibilities	Collaborators
Keeping track of software version and name	databaseMgmt
Keeping track of hardware version and name	faultMgmt