1 Network Management Principles and Protocols Presented by: Mohsen Kahani [email protected]...
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Transcript of 1 Network Management Principles and Protocols Presented by: Mohsen Kahani [email protected]...
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Network ManagementPrinciples and Protocols
Presented by:
Mohsen Kahani [email protected] 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 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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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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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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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