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Network Management Concept
Network management is the process of controlling
a complex data network to maximize its efficiency
and productivity.
Network management is a combination of local
and remote configuration and managed with
software.
3. NMA = network management
application
NME = network management entity
Appl = application
Comm = communications software
OS = Operating system 3
NMA
NME Appi
Comm
OS
Network control
Host (manager)
NME
Comm
OS
Appi
Server
(agent)
Workstation
(agent)
NME
Comm
OS
Appl
NME
Comm
OS
Router
(agent)
Network Management System
4. OSI Standard Functions
In 1977 International Organization for Standards
(ISO) began work on Open Systems
Interconnection (OSI) reference model
OSI divided network management into five
functional areas:
– Fault Management
– Configuration Management
– Security Management
– Performance Management
– Accounting Management
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5. Fault Management
Is the process of locating problems, or
faults, on the data network.
It involves the following steps:
– Discover the problem
– Isolate the problem
– Fix the problem (if possible)
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6. Configuration Management
The configuration of certain network
devices controls the behavior of the data
network.
Configuration management is the process
of finding and setting up (configuring)
these critical devices.
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7. Security Management
Is the process of controlling access to
information on the data network.
Provides a way to monitor access points
and records information on a periodic basis
Provides audit trails and sounds alarms for
security breaches
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8. Performance Management
Involves measuring the performance of the
network hardware, software, and media
Examples of measured activities are:
– Overall throughput
– Percentage utilization
– Error rates
– Response time
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9. Accounting Management
Involves tracking individual’s utilization
and grouping of network resources to
ensure that users have sufficient resources
Involves granting or removing permission
for access to the network
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10. Network Management Protocols
So where is technology today?
– The most common protocols are:
SNMP (Simple Network Management Protocol)
SNMPv2 (SNMP version 2)
CMIS/CMIP (Common Management Information
Services/Common Management Information
Protocol)
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11. Network Management
Architectures
The Network Management Platform can use
various architectures to provide functionality
The 3 most common are:
– Centralized
– Hierarchical
– Distributed
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12. Management Structure
Centralized
– Single management station.
Distributed
– A number of management stations.
– Distribution by “Function” .
– Distribution by “Geographical Area”.
Hierarchical
– One system acting as the central server.
– Other systems working as clients.
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