Enterasys RoamAbout 3000 Guide de l'utilisateur télécharger pdf (Page 39)

RF Coverage Area

RoamAbout Switch Manager User’s Guide 2-3

RF Coverage Area

What is an RF coverage area?:AnRFcoverageareaisthegeographicalareainwhichIEEE

802.11radiosprovidewirelessservices.

Purpose of this section:TodescribethethreetechniquesyoucanuseforRFcoverage.

Why is this important?:ByunderstandingavailableRFcoverageplanningtechniques,youcan

usethetechniquethatmeetsyourorganization’srequirements.

Therearethreetechniquesyoucanusetostartyourwirelessnetwork:

• RFAuto‐Tuningletsyouusethedefaultautotuningfeaturetoselectpowerandchannel

settingsforRFsignalsin

yourRFcoveragearea.YouuploadtheRoamAboutswitchesinto

RASM,configuretheAPs,enableRFAuto‐Tuning,anddeploy.

• RFAuto‐TuningwithModelling,aswiththeRFAuto‐Tuningtechnique,letsyousettheauto

tuningfeaturetoadjustpowerandchannelsettingstoprovideRFsignalsto

thecoveragearea

foryourusers.Enhancetheautotuningfeaturebyprovidingmodellinginformationabout

yourgeographiclocation.Byprovidingsomeinformationaboutyourbuildingsandfloors,

addenoughdetailsintoRASMsothatyoucanbettervisualizeyournetworktopologyand

supportimprovedmonitoringatyoursite.

• RF

Planningisatechniqueyoucanusetocreateadetailednetworkplanthatprovides

powerfulmonitoringandvisualizationbenefits.UnlikeRFAuto‐TuningorRFAuto‐Tuning

withModelling,youdonotrelyontheautotuningfeature.Instead,youfullymodelyour

geographiclocationwithdetailedinformationabout

yourfloors,andspecifyyourRF

coverageareasandyourRFobstacles.

Eachofthesemethodsisdescribedinthesectionsthatfollow.

RF Auto-Tuning

PerformthefollowingstepstousetheRFAuto‐Tuningtechnique:

1. PhysicallyplaceRoamAboutswitchesandtheAPsintheirdesiredlocations.

2. UploadaRoamAbout switchconfigurationanddeployit.

3. EnabletheRFAuto‐Tuningfeature.

ThisisagreatwaytoinstallaRoamAboutswitchandsomeAPs,andobservehow

thenetwork

operates.TheRFAuto‐TuningplanisbestsuitedtonetworkscontainingfewerAPs.

RF Auto-Tuning with Modelling

TousetheRFAuto‐TuningwithModellingtechnique,youaddtotheRFAuto‐Tuningtechnique

byprovidingsomegeographicalmodellingaboutyourbuilding,floors,andRFcoveragearea.You

alsoaddRFobstacleinformationformajorobstacles(likeconcretewalls,windows,andelevator

shafts)thataffectattenuation—thequalityof

RFsignalsemittedfromandreceivedbytheAPs.By

addinggeographicalmodelling,youwillbeabletomanageyournetworkinthecontextofthat

geographicalinformation.Forexample,youwillbeabletomanageyournetworkoverlaidona

floorplan,versusmanaginganabstractlogicalgroupof

switchesandAPs.

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Enterasys RoamAbout 3000 Guide de l'utilisateur Page 39

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