management integration network management spring 2014 bahador bakhshi ce & it department,...
TRANSCRIPT
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Management Integration
Network Management
Spring 2014
Bahador Bakhshi
CE & IT Department, Amirkabir University of Technology
This presentation is based on the slides listed in references.
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Outline
Introduction
Integration perspectives
Integration challenges
Integration approaches
Summary
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Outline
Introduction
Integration perspectives
Integration challenges
Integration approaches
Summary
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The Basic Ingredients of Network Management
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Previous Lecture: Management Functionalities
Current Lecture: How are these functionalities implemented and integrated?
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Non-integrated Network Management
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Integrated Network Management
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Management Integration
Different management functions diverse set of management applications complicated NM
Management integration seamlessly integrated and end-to-end management support Avoids manual procedure and human errors Avoids cost of employing and training many operators Reduces amount of redundant data Reduces management overhead (traffic, computation,
storage) Facilitates management of the management itself …
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Outline
Introduction
Integration perspectives
Integration challenges
Integration approaches
Summary
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NM Integration Perspectives What is the scope of the NM integration?
It depends on who answers Different perspectives of NM integration
Equipment vendors perspective Integrating various element management functions
Enterprise perspective Integrate management of a network that includes a wide range of
different types of devices
Service provider perspective Many different tools have to be integrated
Each of which might be “fully integrated” from their limited perspective
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Equipment Vendor Perspective Integrated element management application to configure, audit,
monitored, back up, restored, … of the vendor equipments
Open and well-documented interfaces as part of the management applications
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Enterprise Perspective End-to-End Multi-vendor Network management
Network level & End-to-End management applications: topology & Routing Multi vendor support
Vendor-dependent EMSs need to be either replaced by a vendor-independent system or complemented by systems that integrate certain EMS functions
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Service Provider Perspective Service & Business on multivendor Network
End-to-end connectivity though different devices Different services provisioning & monitoring Billing using customer, service, accounting information
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Integration Scope & Importance & Cost
As it becomes more important to address management integration in larger scope, it becomes more difficult to do so
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High CAPEX
High OPEX
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Outline
Introduction
Integration perspectives
Integration challenges
Integration approaches
Summary
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Management Integration Challenges
Two dimensions affecting NM integration complexity Management functions need to be integrated across the
managed domain Device heterogeneity
Different features, different mgmt interface, different MIB, … Services heterogeneity
Different provisioning mechanism, QoS parameters, …
Different management functions have to be integrated FCAPS functions have many common sub-functions Relation between functions, e.g., FM needs access to
CMDB, which is managed by CM
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Management Integration Challenges
Heterogeneity complexity f(#vendors) * f(#device types) * f(#technologies)
Function complexity f(#management functions) * f(integration depth)
Scale complexity f(#ports, #devices)
Management integration complexity scale complexity ~ (heterogeneity complexity * function
complexity)
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Management Integration Challenges Software architecture complications
Challenges due to heterogeneous application requirements Scalable meanwhile cost-efficient Flexible & extensible to support new devices
Challenges from conflicting software architecture goals Different management functions can impose conflicting
requirements on the software architecture
Trying to address the needs of multiple management function in a single system inevitably leads to situations in which the best that can be accomplished might be a compromise Build multiple applications that each serves a particular purpose
and simply make sure that they can work well together
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Outline
Introduction
Integration perspectives
Integration challenges
Integration approaches
Summary
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NM Integration Approaches The integration problem is generally too large to be
tackled all at once Trade-off (partial integration) Not to integrate certain aspects, to lower management
integration complexity and cost, at expense of operations Where to make the cut? (an optimization problem)
Place where a high reduction in management integration complexity and cost results, yet operations efficiency is minimally impacted
How to find the cut? Look at NM dimensions and decide which dimension is the most
crucial for integration minimize the interactions E.g. “function dimension” integrated fault management for all devices E.g., “management layer” integrated application for service provisioning
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NM Integration: Platform Approach A common approach to management integration is using a
management platform Software system that provides common infrastructure services for
management applications (NM Middleware/Application server) Typically, software development kits that facilitate the development
of additional functionality
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NM Integration: Platform Approach Typically, Service Oriented Architecture (SOA)
Applications need to use those services interact and exchange information with the platform components that provide those services
Some common example services Database, Device communication (mgmt protocols),
Network discovery & inventory, Network configuration cache, Current alarms state, Event collection & registration, GUI framework & API, …
Some common example applications Topology viewer, MIB browser, Alarm viewer, basic alarm
correlation & filtering, …
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NM Integration: Platform Approach
Different device support? Device-specific application logic is not hard-coded into the
algorithms of the management platform
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NM Integration: Custom Approach
Consists of multiple management systems and applications (components) integrated to work together and collectively form the operations support infrastructure that is used to manage the network Might better fit the particular needs of an operations
support organization
Issues: Well-defined scope of functionality
All management required functionalities should be covered by components
Component functionalities may overlap
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Custom Integration Issues
Issues (cont’d): Northbound interface, allowing other applications
and components on top of it to “flow through” operations to the network
Different requirements (OS, DB, …) by different components
Data mediation between components Harder to keep updated Umbrella component: a central coordinator
Such as work-flow: integration activities on system
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Outline
Introduction
Integration perspectives
Integration challenges
Integration approaches
Summary
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Summary In service provider networks, an integrated system is used for
network management
OSS (Operations Support System) Software applications that support back-office activities which operate
a telco’s network, provision and maintain customer services
BSS (Business Support System) Software applications that support customer-facing activities. Billing, order management, customer relationship management, call
centre automation, are BSS applications
In the past, OSS & BSS had a clearer separation; current trend integrated OSS/BSS software
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References
Reading Assignment: Chapter 10 of “Alexander Clemm, ‘Network Management Fundamentals’ , Cisco Press, 2007”
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