Whatislowleveldesigndocument.Whatislowleveldesigndocumentinsoftware.Whatshouldalowleveldesigndocumentcontain.Itlowleveldesigndocumenttemplate.Highleveldesigndocumentvslow
leveldesigndocument.Infrastructurelowleveldesigndocumenttemplate.Lowleveldesigndocumenttemplateword.Exampleoflowleveldesigndocument.
DecomposingasystemintomodulesandillustratinginterfacesandinvocationrelationshipsamongthemconstitutesHigh-LevelDesign(HLD).Thisdocument,alsoreferredtoassoftwarearchitecture,outlinestheoverallstructureofthesystem.Incontrast,Low-LevelDesign(LLD)delvesdeeperintotheinternalworkingsofindividualmodules,
detailingdatastructures,algorithms,andprogramspecifications.IntraditionalFunction-OrientedSoftwareDesignapproaches,HLDandLLDareemployed.Conversely,Object-OrientedAnalysisandDesign(OOAD)viewssystemsasinteractingobjects.Ahigh-leveldesigndocumenttypicallyincludesadiagramdepictingcomponents,interfaces,and
networksthatrequirefurtherspecificationordevelopment.
Itlowleveldesigndocumenttemplate.Highleveldesigndocumentvslowleveldesigndocument.Infrastructurelowleveldesigndocumenttemplate.Lowleveldesigndocumenttemplateword.Exampleoflowleveldesigndocument.
DecomposingasystemintomodulesandillustratinginterfacesandinvocationrelationshipsamongthemconstitutesHigh-LevelDesign(HLD).Thisdocument,alsoreferredtoassoftwarearchitecture,outlinestheoverallstructureofthesystem.Incontrast,Low-LevelDesign(LLD)delvesdeeperintotheinternalworkingsofindividualmodules,
detailingdatastructures,algorithms,andprogramspecifications.IntraditionalFunction-OrientedSoftwareDesignapproaches,HLDandLLDareemployed.Conversely,Object-OrientedAnalysisandDesign(OOAD)viewssystemsasinteractingobjects.Ahigh-leveldesigndocumenttypicallyincludesadiagramdepictingcomponents,interfaces,and
networksthatrequirefurtherspecificationordevelopment.LLDdocumentsdescribeeachmoduleindetail,enablingprogrammerstodirectlyimplementtheprogrambasedonthisinformation.Thesedocumentscontainpseudocode,databasedetails,interfacespecifications,dependencyissues,errormessages,inputs,andoutputsforeachmodule.
WhencraftingasolidLLDforpacketnetworks,severalkeyelementsmustbeconsidered.FornetworkengineersandITprofessionals,optimizingperformanceandscalabilityiscrucial.
Lowleveldesigndocumenttemplateword.Exampleoflowleveldesigndocument.
DecomposingasystemintomodulesandillustratinginterfacesandinvocationrelationshipsamongthemconstitutesHigh-LevelDesign(HLD).Thisdocument,alsoreferredtoassoftwarearchitecture,outlinestheoverallstructureofthesystem.Incontrast,Low-LevelDesign(LLD)delvesdeeperintotheinternalworkingsofindividualmodules,
detailingdatastructures,algorithms,andprogramspecifications.IntraditionalFunction-OrientedSoftwareDesignapproaches,HLDandLLDareemployed.Conversely,Object-OrientedAnalysisandDesign(OOAD)viewssystemsasinteractingobjects.Ahigh-leveldesigndocumenttypicallyincludesadiagramdepictingcomponents,interfaces,and
networksthatrequirefurtherspecificationordevelopment.LLDdocumentsdescribeeachmoduleindetail,enablingprogrammerstodirectlyimplementtheprogrambasedonthisinformation.Thesedocumentscontainpseudocode,databasedetails,interfacespecifications,dependencyissues,errormessages,inputs,andoutputsforeachmodule.
WhencraftingasolidLLDforpacketnetworks,severalkeyelementsmustbeconsidered.FornetworkengineersandITprofessionals,optimizingperformanceandscalabilityiscrucial.Mappinglogicaltophysicaltopologyensuresaligningbusinessneedswithcapabilities.Forbusinessleaders,anLLDthatmeetsoperationalandbudgetaryneedsis
vital.ArobustLLDshouldincludequantifiablebandwidthcapacity,securitylayers,hardware/softwarespecifications,trafficflowmodels,accesscontrolmaps,andmodularityforeasycomponentalteration.ThisframeworkprovidesacomprehensiveviewofnetworkexpansionoptionsforC-levelexecutivesanddirectors.Inthisarticle,wewillexplore
bothISPandEnterpriseLLDconsiderations,startingwithEnterpriseones.Whenarchitectinglarge-scalecorporateinfrastructure,attentiontodetailisessential.Asolidunderstandingofkeyspecificsiscrucialduringnetworkoutages.ForacomprehensiveITinfrastructure,it'scrucialtodocumenteverycompany'sLow-LevelDesign(LLD)inaclear
andconcisemanner.
Exampleoflowleveldesigndocument.
DecomposingasystemintomodulesandillustratinginterfacesandinvocationrelationshipsamongthemconstitutesHigh-LevelDesign(HLD).Thisdocument,alsoreferredtoassoftwarearchitecture,outlinestheoverallstructureofthesystem.
Infrastructurelowleveldesigndocumenttemplate.Lowleveldesigndocumenttemplateword.Exampleoflowleveldesigndocument.
DecomposingasystemintomodulesandillustratinginterfacesandinvocationrelationshipsamongthemconstitutesHigh-LevelDesign(HLD).
Thisdocument,alsoreferredtoassoftwarearchitecture,outlinestheoverallstructureofthesystem.Incontrast,Low-LevelDesign(LLD)delvesdeeperintotheinternalworkingsofindividualmodules,detailingdatastructures,algorithms,andprogramspecifications.IntraditionalFunction-OrientedSoftwareDesignapproaches,HLDandLLDare
employed.
Conversely,Object-OrientedAnalysisandDesign(OOAD)viewssystemsasinteractingobjects.Ahigh-leveldesigndocumenttypicallyincludesadiagramdepictingcomponents,interfaces,andnetworksthatrequirefurtherspecificationordevelopment.LLDdocumentsdescribeeachmoduleindetail,enablingprogrammerstodirectlyimplementthe
programbasedonthisinformation.Thesedocumentscontainpseudocode,databasedetails,interfacespecifications,dependencyissues,errormessages,inputs,andoutputsforeachmodule.WhencraftingasolidLLDforpacketnetworks,severalkeyelementsmustbeconsidered.FornetworkengineersandITprofessionals,optimizingperformance
andscalabilityiscrucial.Mappinglogicaltophysicaltopologyensuresaligningbusinessneedswithcapabilities.Forbusinessleaders,anLLDthatmeetsoperationalandbudgetaryneedsisvital.
ArobustLLDshouldincludequantifiablebandwidthcapacity,securitylayers,hardware/softwarespecifications,trafficflowmodels,accesscontrolmaps,andmodularityforeasycomponentalteration.ThisframeworkprovidesacomprehensiveviewofnetworkexpansionoptionsforC-levelexecutivesanddirectors.Inthisarticle,wewillexploreboth
ISPandEnterpriseLLDconsiderations,startingwithEnterpriseones.Whenarchitectinglarge-scalecorporateinfrastructure,attentiontodetailisessential.Asolidunderstandingofkeyspecificsiscrucialduringnetworkoutages.ForacomprehensiveITinfrastructure,it'scrucialtodocumenteverycompany'sLow-LevelDesign(LLD)inaclearand
concisemanner.Thisincludesessentialdetailssuchasthesitename,whichshouldbeuniqueandeasilyidentifiablefornewITpersonnel.IntheLLD,serviceproviders'informationisvital,includingtheirname,circuitID,andconnectiontype(e.g.,DIA,EPL,MPLS,orhybrid).Thesubscribedbandwidthanditsusagearealsocrucialintroubleshooting
speedissues.Additionally,detailsonVPNconnections,suchaswhetherIPsecorSSLisused,shouldbeincluded.It'sessentialtodocumentportnumbers,interfacetypes,andothernetworkequipmentinformation,includingingressandegressports,copperorSFPtypes,opticalwavelength,andconnectortype.Thisensuresthatallnecessarydetails
arecapturedfortroubleshootingpurposes.Backupoptions,suchasauto-failoverthroughroutingprotocolsorSD-WAN,shouldalsobedocumentedintheLLD.Photographsofsiteinstallationscanbeincrediblyhelpfulduringoutagesorwhenrebuildingsitesfromscratch.Adetaileddiagramofserviceproviders'infrastructure,includingDedicated
internetaccesslinksandEthernetprivatepoint-to-pointlinks,isessentialforunderstandingnetworktopology.IPaddresses,subnetmasks,gatewayIPs,andcriticalnetworkservicesshouldalsobedocumentedintheLLD.TheLow-LevelDesignshouldincludeessentialdetailsthatarealsoincorporatedintocustomerhandoverdocuments,contract
agreements,andSLAs.Whenitcomestonetworksegmentationonlayer2,VLANsintheISPplayacrucialrole.Additionally,DIAorEPLcircuitswillfeatureacustomerVLANorQinQ'sS-VLAN/tagandC-VLAN/tag.Itisvitaltomentionbothdetails.Thehandoffportcanbeeithersinglytagged,doubletagged,oruntagged.Thisinformationshouldbe
includedinthecustomerhandoverdocumenttofacilitatetroubleticketing.Furthermore,itisessentialtospecifydevicemakes,models,types,hostnames,andlabelsforphysicalequipment,whichcanprovehelpfulduringon-sitecatastrophesorwhenreviewingnetworksetupsafteradecade.Therightparticularsbridgethegapbetweenhigh-level
designandLow-LevelDesign.Ourchecklistequipsyouwithkeycomponentsnecessaryforeverynetworkengineeringdesign–anLLDthateverypacketnetworkmusthave.RegardingyourrequestforDocumentationTemplatestosupportInformatica,Icanprovidetemplatesfordatamodeling,LowLevelDesign,HighlevelDesign,andmapping.
Pleaseletmeknowifthisishelpful.Thankyou,andregards,A.JaganMohanRao