02 Basline Mapping

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Network Systems

Design 304

Network MappingBaselining


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Audit

Network management should start with an AuditDocument / Map the entire networkEvaluate and baseline the physical and data link layer

infrastructureEvaluate and baseline network traffic and protocolsEvaluate and baseline platforms, operating systems

and applicationsEvaluate security (Later module)


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Network Mapping

DefinitionGoalBenefitsSeven Layer OSI Reference ModelNon NetworkApplicationsIn the good old days


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Network Mapping Definition

Detailed description of everythingComplex Networks are difficult to visualise

Big RewardsTime consuming, boring!


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Network Mapping Goals

The goal of network mapping is to create aComplete;Accurate;Detailed;Up to date

Picture of the network and environs.


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Network Mapping Benefits

RequirementsJustification for costs

Fault DiagnosisProof of conformity

Reduces TrainingMight save your job!


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Network Mapping OSI

Physical LayerData Link LayerNetwork LayerTransport LayerSession LayerPresentation LayerApplication Layer


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Physical Layer

The Biggest JobEvery DeviceCabling Patch Panels

Topology and Topography


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Network Layer

InternetWANLANVPNHost NamesIP addressesPolicies


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Transport Layer

Access to ports


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Session Layer

Remote ConnectionsProtocols


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Presentation Layer

Encryption


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Application Layer

EmailEnd User Applications

PoliciesLicenses


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Non Network Information

Network Purpose StatementWhy do we have a network?Primary functionsWhat if it fails?What the network is not!


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Non Network Information cont.

Network OverviewHelp the Network Administrator find what theyare looking for fast.Outline the frameworkFAQs

Hints


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Physical LocationsFloor plansAddresses

Visitor entrancesDeliveriesDriving directions

Managers


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ResourcesAccount ManagementUsername and password for web

SignatoriesWho makes decisions?

Suppliers


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Network Mapping Tools

Open SourceNagiosOpenNMSknetmap


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Network Mapping Tools

CommercialSmartDrawVisionetVizNeon LANsurveyor


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Baselining

WhyWhat

WhenHow


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Baselining

Optimize quality of serviceGather performance data.Analyze the data.

Determine appropriate performance thresholds.


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Baseliningthe act of measuring and rating the performance of a network in real-time situations

http://www.webopedia.com/TERM/n/network_baselining.html

comparing current performance to a historical metric, or

"baselinehttp://en.wikipedia.org/wiki/Baselining


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Why BaselineTo determine normal operating conditionsTo identify and forecast problemsTroubleshootingPredict network operationPredict the ability to handle new tasks (scaling)

Optimisation


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When

Begin immediatelyLong term

Use the baseline to determine thebaseline scheduleSpecial attention areasAll levels of system activity


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HowDetermine what we have (inventory)Determine what needs to be measuredDetermine when it needs to be measuredUse the long term baseline to determine howoften items need to be measuredRepeat the measurements regularlyImplement a way of obtaining alertsImplement a way of detecting trendsCreate a data repository


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Care When BaseliningThe very act of recording data for a baselinecan skew the results

Known as measurement degradation, it may occurBecause the act of measuring an objects performance mayincrease its workloadIf too short a time interval is used when measuringWhen measuring multiple objects on a single system

A base line is not an analysis, it is a tool thatcan be used to do analysisDo not start the analysis until you map the network


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Analysis

What are normal operating conditions ?What are the peak operating conditions?

Why are the conditions the way they are?How will problems be assessed?

How will modifications be assessed?


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Glossary

ROI Return on investmentSingle Points of Failure (SPOFs)

critical componentsMTBF mean time between failure

MTTR mean time to repairAFR annualized failure rate


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GlossaryUptime amount of time the utility isavailable to users

Downtime amount of time the utility isunavailable to users

Availability percentage of time the utilityis available to the user

Documents

02 Basline Mapping