WiFi发展趋势和网络规模优化

WiFi开展趋势和网络规模优化Wi-Fi开展趋势UserInstalled–LoseControl1NewApplicationsLocationServices4VoiceMobilityRFIDSolutionsCompellingEconomics3ORMobileHealthcareMobilePointofSaleMobileConnectivityBusinessDemandsMobility2移动性

–不可阻挡的趋势

TheEnterpriseITContext企业WLAN遇到的挑战OPEXofAP

managementRFspectrum

managementLargescale

deploymentsSecurityissues

andupgradesMobilityacross

accesspointsRogueaccess

pointsThreeProblemsArubaSetOuttoSolveVoiceover

WirelessLANsSecurityIssuesMobilityIssuesBatteryLife321RiskInadequateSecurityPerformanceSlowandSharedManagementManualandCumbersome是什么阻碍了无线网络成为主要的网络连接方式？ArubaChangesEverythingLocationTimeChannelAvailability不可否认的事实MobilityIsEverIncreasing1Macro-EconomicPressureOnBusiness2802.11noffersabigperformancejump38802.11nAsA2-For-1Technology9DemandforMobilityNetworkCostReduction网络规模的优化有限网络的局限性MultipleportsperuserExcessswitchcapacityCostlycablingExpensivechanges过度建设的有线边缘设备100Mbps,ratelimitedto<5Mbps2to4portspercubical,mostlyidle#ofswitchesroundedupto48portsToomanywiringclosetsGigEhardwarerefreshAnnualcostsofexcesscapacity15%maintenancefees ~$1,600/switchMoves/adds/changes/upkeep ~$1,680/switchHardwareRefresh ~$918/switchPower&Cooling ~$284/switch

AnnualBurn ~$4,482/switch12网络规模优化的主要原那么Shiftuserstotheleast-costaccessmethodEliminateunnecessaryinfrastructureReducecomplexity&costs123Consistent/improveduserexperience4VVVVVVVVVVVVDDDDDDDOOOOWirelessisamoreefficient,many-to-oneaccessmethodAPO“Right-sized”Edge(Oneportsupportsmultipleusersanddevicessimultaneously)更多的用户，更少的端口14L12VOIPphones7DesktopPC’s5LaptopPCs1WirelessAP(mobiledevices,guests,etc.)6Conferenceroom&publicareaports5Otherdevices(printer,copier,fax,etc.)12Ports(reservedforfutureuse)DVFOCAPVVVVVVVVVVVVDDDDDDDAPOOOOFFFFFFFFFFFFLLLLLCCCCCCOExistingWiredNetworkEdge(1:1ratioofportstodevices)Representative12-personWorkgroupWireless什么影响网络规模优化的价值？

WirelessWirelessCurrent11a/b/g/nPlans2.#ofportsperperson3.%ofuserswithlaptopsvs.vs.vs.vs.15优化网络边缘侧设备的步骤WiredEdgeCostsOfRunningTheEdge1ConferenceRoomsandPublicAreas2HotelingorTempOffices3Laptops4VoiceDevicesRightsizedEdgeXDesktopsTakeOutUnusedPortsToSave$4,500PerSwitch"Thetrendofserveranddatacenterconsolidation,hostedvirtualdesktopsandcloudcomputinghavealteredtherequirementsfornetworkservicesandhowtheLANcouldbearchitected.""Donotoverspendonhighlyengineered,expensive,traditionalapproachestocampusLANarchitectures.Considerextendingthelifespanofcurrentinvestments."802.11n满足和超过有线以太网181.MoreCapacity3.HigherSpeeds2.BetterReliabilityMIMO3Channels1HTchannel24Channels11HTchannels2.4GHz5GHz“802.11noffersamorewire-likeexperience.〞 --CraigMathias,FarpointGroupMobilityIsIn,FixedIsOut能有一个新的网络边缘吗？AsFastAsWiredAsReliableAsWired802.11nMoreSecureThanWiredManagedLikeWired802.11nChangesTheGameFreeTheUser,FreeITBudgetsThenewnetworkedgebasedon802.11nprovidesunrivaledmobilitytoend-usersandfreesuphard&softdollarstied-upinsupportcontractsenergyandmaintenancecostsofover-provisionedwirednetworks.19“802.11nisthebeginningoftheendforwiredEthernet.802.11nwillputpervasivemobilityonthefasttrack.〞 PaulDeBeasi,BurtonGroup August,200720采用新网络边缘的步骤VoiceMostDesktopsMost

LaptopsStartwithlow-hangingfruitAswirelessbecomespervasive,pacewillaccelerateAt50%Wireless,yearlysavings~$125K/500users~175%ROIover3yearsSomeLaptopsGuests

Conf.RoomsHotelingWorkers2122新的网络边缘在这里>11,000accesspoints,80,000uniqueclientsacross60countries72%ofemployeessaidtheycouldworkwithoutanywiresatall70%saidthewirelessnetworksavedthematleast5workhoursaweekbecauseofincreasedflexibility“Becauseoflargeuseradoptionofwirelessconnectivityitisnotdifficulttoenvisionatimewhenwetransitiontoanall-wirelessworkplace.〞VictoriaPoncini,Microsoft’sNetworkArchitect总结: