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Network ManagementPrinciples and Protocols

Presented by:

Mohsen Kahani kahani@ferdowsi.um.ac.irFerdowsi University of Mashhad

Faculty of Engineering

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Table of Contents

Introduction Network Management Functional Areas

• Fault Management

• Performance Management

• Configuration Management

• Security Management

• Accounting Management

Network Management Standards• Simple Network Management Protocol

• OSI Model

• Telecommunication Management Network

• Web-based Approaches

Conclusion

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Introduction

MotivationMotivation

A bit of HistoryA bit of History

DefinitionDefinition

A Network Management System (NMS) Network Management System (NMS) is is used to

design, organize, analyze and administer

computer and telecommunication networks, in

order to maintain a desired level of service at all

times.

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NM Architecture

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NM Functional Areas

Configuration Management Fault Management Performance Management Security Management Accounting Management

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Configuration Management

Inventory management Network topology services Service-level agreement Designing, implementing and processing trouble

tickets Order processing and provisioning Change management Directory services

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Configuration Management

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Fault Management

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Fault Management

Issues Alarm Correlation Trouble Ticketing System Expert System Application

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Performance Management

Definition of performance indicators• Service-oriented indicators

- Availability, Response time, Accuracy

• Efficiency-oriented indicators- Throughput,Utilization

Performance monitoring• Monitoring against the indicator

Thresholding and exception reporting Analysis and tuning Establishing operational standards

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Security Management

Risk Analysis Protecting the Managed Objects Authentication Procedures Maintenance of Access Control Routines Management of Keys for Encipherment Maintenance of Authorization Facilities Maintenace of Security Logs Protecting the NMS

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Accounting Management

Identification of cost components Establishing change-back policies Definition of charge-back procesdures Processing vendor bills Integration of Network accounting into corporate

accounting policy

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NM Standards

Simple Network Management Protocol• SNMP V1, V2, V3

OSI Model• Object-based approach

TMN Model• Just a framework for network management systems

Web-based Approach

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SNMP

Management Information Base (MIB)• Virtual Information Store of MOs

• Information are stored at MOs using different approaches

• MIB II added a number of useful variables

Structure of Management Information (SMI)• Framework fot the Definition of SNMP MIBs

• Object Information Model for Network Management

• Formal Description of the Structure are Given Using a Subset of ASN.1

Abstract Syntax Notation 1 (ASN.1)• A Standard Object Definition Language

• A Standard Way to Encode Objects for Transfer Over a Network

• It’s Large,Complex,and not Especially Efficient

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SNMP PDU’s

get-request get-next-request get-response set-request trap get-bulk-request inform-request

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SNMP Versions

SNMP v1• Designed to be an interim solution

• No security consideration

• Not efficient

SNMP v2• Authentication of the Message Source

• Protecting Messages from Disclosure

• Placing Access Control on MIBs

• Multiple Request Problem solved

• Traps Have the Same Format as Other PDUs

• 2 New Operations

• Much Layers and More Complex

SNMP v3• Built Upon the Two First Versions of SNMP

• Additional Security and Administrative Capabilities

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OSI Architecture

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TMN

An Important Framework for Management of Telecommunication Networks

A Host of Management Functions and Communications• Operation

• Administration

• Maintenance

• Provision

Chosen By Telco’s for Managing WANs Enables Communication between Operations System(OSs) and

Network Elements(NEs) Via a Data Communications Network(DCN)

Base for ATM network management

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TMN Architecture

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Web-based Approaches

Using HTTP instead of SNMP• Web-Based Enterprise Management (WBEM)

• Java Management API (JMAPI)

Using Web as an Interface paradigm

• Bay Networks’ Optivity Web • Computer Associate’s

Unicenter TNG• WNMS

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Conclusion

Network management is critical for big networks The principle of network management was

discussed Some network management standards were

explained Web-based management is becoming a strong

player in the field

Thank You For Listening