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Radio Interface

4-60 Advanced Configuration

faster.UsinghigherDTIMvaluesreducesthepowerusedbystationsinPowerSavemode,but

delaysthetransmissionofbroadcast/multicastframes.Range:1‐255beacons;Default:2

beacons

• FragmentLength(256‐2346)specifiesanalternativeframelengthforpackets.When

transmittingdataviathewirelessnetwork,yourwirelessnetworkautomatically

splitsupthe

fileormessageinanumberofdifferentpacketsthatarere‐assembledagainbythe

communicationpartner.RoamAboutproductsusestandardIEEE802.11compatibleframe

lengths,wheredifferentlengthsapplyforeachTransmitRate.Fragmentationwillapply

alternative(usuallyshorter)framelengthstosplitandreassemble

thewirelessdataframes.

Default:2346.

• RTSThreshold(0‐2347)setstheRequesttoSend(RTS)thresholdframelengthbetween0and

2,327bytes.YoucanconfiguretheaccesspointtoinitiateanRTSframesequencealways,

never,oronlyonframeslongerthanaspecifiedlength.Ifthepacket

sizeissmallerthanthe

presetRTSthresholdsize,theRTS/CTSmechanismwillNOTbeenabled.

Theaccesspointsendsrequesttosend(RTS)framestoaparticularreceivingstationto

negotiatethesendingofadataframe.AfterreceivinganRTS,thestationsendaCTS(Clearto

Send)frame

toacknowledgetherightforthestationtosenddataframes.

Theaccesspointcontendingforthemediummaynotbeawareofeachother.TheRTS/CTS 

mechanismcansolvethisʺHiddenNodeProblemʺ.

IftheRTSthresholdissetto0,theaccesspointneversendsRTSsignals.If

setto2347,the

accesspointalwayssendsRTSsignals.Ifsettoanyothervalue,andthepacketsizeequalsor

exceedstheRTSthreshold,theRTS/CTS(RequesttoSend/CleartoSend)mechanismwillbe

enabled.Range:0‐2347bytes.Default:2347bytes

Enterasys RoamAbout RBT-4102 User Manual

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