Network Management
Principles and Protocols
Presented by:
Mohsen Kahani
[email protected]
Ferdowsi 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

Motivation

A bit of History

Definition
A Network Management System (NMS) 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
4
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
6
Configuration Management
7
Fault Management
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Fault Management
Issues

Alarm Correlation

Trouble Ticketing System

Expert System Application
9
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
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