basic network management functions

8/2/2019 Basic Network Management Functions

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Saad Haj Bakry, PhD, CEng, FIEE 1

Network Management

Functions

Saad Haj Bakry, PhD, CEng, FIEE

PRESENTATIONS IN NETWORK MANAGEMENT


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Objectives / Contents

Network Management Concept

OSI Standard Functions

Additional Functions

Network Management Functions


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ManagementConcept: An Overview

Management Station RouterAgent

Host

Agent

Host

Agent

Management Protocol

Internet



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ManagementConcept: An Agent

An Agent A functional unit

(software) that resides ina managed device

It provides managementinformation about the

managed device It accepts instructions to

configure the device

A Proxy AgentAn agent, but it

does not reside in

the managed

device.



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ManagementConcept: Structure

Centralized

Single management station

Distributed

A number of management stations

Distribution by Function

Distribution by Geographical Area

Hierarchical

Centralized at routes / Distributed peer systems



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ManagementConcept: Structure

a1 a2 a3 b1 b2 b3

A B

Main

Level (3)

Level (2)

Level (1)

Centralized /Distributed /HierarchicalManagementPrinciples



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OSI Standard Functions

Fault Management

Performance Management Configuration Management

Security Management

Accounting Management



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Fault Management: Definition

The Discipline of

Detecting

Diagnosing

Bypassing

Repairing

ReportingNetwork Equipment & Service Failures



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Fault Management: Activities

Trace (Monitor) & Identify Faults(Abnormal Operation)

Accept Facts &Act on Error-DetectionNotification

Carry Out Sequences ofDiagnostic Tests

Correct Faults Maintain and Examine Error Logs



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Fault Management: Summary

Alarm

(Categories / Priorities) Response

(Repair / Clear Alarm)

Recording(Report)



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Performance Management: Definition

The Utilization of

Network Resources

with

The Ability to meet

User Service Level Objectives



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Performance Management: Activities

Information Gathering

Current System (Traffic / Resources)

System History (Logs)

Performance Evaluation (Analysis)

For Different States / Conditions

Understanding / Reporting



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Performance Management: Summary

Evaluations of the Behaviour &

Cost-Effectiveness

of NetworkResources



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Configuration Management: Definition

Maintaining an Accurate Inventory of

HW / SW / Communication Links

(Network Resources)& the Ability to Change the Inventory in a

Smooth & Reliable Manner in Response to

Changing

Services Requirements

(Changing Resources in Response to Changing

Requirements )



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Configuration Management: Activities

Define:

Parameters that Control NetworkOperation

Managed Objects (Names)

Collect Information on Current State

Monitor Current State Changes

Change Configuration in Response toCurrent State Changes



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Configuration Management: Summary

Continuous Information Collection Detection ofChanges

Scheduling Resource Provisioningin

Response to Changes



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Security Management: Definition

Access Control to the

Network & its Management Systems

Information Protection from

Disclosure &

Modifications



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Security Management: Activities

Access Management

(Users / Use) Detection of Attacks

(Against Information)

Protection Measures(Encryption)



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Accounting Management: Definition

Identifying

Cost(Charges to be Paid)

For the

Use of Network Resources(By Users / Subscribers )



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Accounting Management: Activities

Set Tariff / Costing

(For Use of Resources / Services)

Accumulate Use

(Traffic Information / Data Collection / Recording)

Charging / Billing

(To be Paid by Subscribers )

Accounting / Book Keeping



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Additional Functions

Capacity Planning Management

Strategic Planning

Operations Support Management

Programmability Management



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Capacity Planning Management

Fine-Tuning the Network /

Periodic Re-Optimization(e.g. Adding / Re-Arranging Trunks)

Scheduled Changes:

Terminating / Avoiding Technologies

Adopting Technologies

Migration



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Strategic Planning Management

Part of Business Planning

New Applications / GrowthRe-Organization / Re-Engineering

Cost Estimations / Benefits

Contingency PlanningBack-Up

Disaster Recovery



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Operation Supports Management

People / IT Staff

(Need / Job Description / Training / Management )

Resources (Equipment Management)

Maintenance (Programs / Logs / Shifts)

Information Flow (Transactions / Interactions)



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Programmability Management

Tailoring the Management System to the

Unique Characteristics of the ManagedNetwork (Customization)

System Characteristics

Reporting Capabilities / Scripts Other Options



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Remarks

Concept:

Operation Management Standard Functions:

Operation

Additional Functions:Planning / Support

Any Support of:

Performance

Efficiency

(Cost-Effectiveness)

Quality

Reliability



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Standard Documents: General

Management Framework

(ISO:7498)

Management Information Service Overview(ISO: 2683)

Structure of Management Information(ISO: 2684)



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Standard Documents: Functions

ISO Network Management Functions

Fault ISO: 2687

Performance ISO: 2673

Configuration ISO: 2686

Security ISO: 2688

Accounting ISO: 2687
