User's Manual

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Chapter4 | WirelessSettings 
VLANSettings 
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◆ STBC—Space‐timeBlockCoding sendsmultiplecopies ofthesame  dataover 
anumberofantennas,usingthevariousreceivedversionstoimprovethe 
reliabilityofdatatransfer.Thetransmittedsignalmaytraverseadifficult 
environmentwithscattering,reflection,andrefractionwhichmaythenbe 
furthercorruptedbythermalnoiseinthereceiver,sosomeofthereceived 
copieswillbe betterthanothers.Thisredundancyresultsinahigherchanceof 
beingabletouseoneormoreofthereceivedcopiestocorrectlydecodethe
receivedsignal.(Default:Disabled)
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◆ AMPDU—Enablesordisables theuseofAggregatedMACProtocolDataUnits. 
Physicallayer(PHY)datarateimprovementsdonotincreaserealthroughput 
beyondapointbecauseof802.11protocoloverheads.Themainmediaaccess 
controlfeaturethatprovidesaperformanceimprovementisaggregation.
AggregationofMACprotocoldataunits(MPDUs)isreferredtoasMPDU
aggregationor(A‐MPDU).(Default:Enabled)
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VLANSettings 
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VLANs(virtuallocalareanetworks)areturnedoffbydefault.Ifturnedontheywill 
automaticallytaganypacketspassedtotheLANport fromtherelevantVAP(virtual 
accesspoint).
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TheaccesspointcanemployVLANtaggingtocontrolaccesstonetworkresources 
andincreasesecurity.VLANsseparatetrafficpassingbetweentheaccesspoint, 
associatedclients,andthewirednetwork.YoucanconfigureaVLANforupto13
VAPinterfaces. 
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Notethefollowingpointsabouttheaccesspoint’sVLANsupport:
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◆ IfanEthernetLANportontheaccesspointisassignedaVLANID,anytraffic 
enteringthatportmustbealsotaggedwiththesameVLANID. 
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◆ AmanagementVLANcanbeusedformanagingtheaccesspointthrough
remotemanagementtools,suchasthe webinterface,SSH,TelnetorSNMP.
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Theaccesspointcanbeconfiguredtoonlyacceptmanagementtrafficthatis 
taggedwiththespecifiedmanagementVLANID.ThisIDmustbeassignedto 
theEthernetportsorradiointerfaceswhicharedesignatedtohandle 
management traffic.
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◆ WirelessclientsassociatedtotheaccesspointcanbeassignedtoaVLAN. 
WirelessclientsareassignedtotheVLANfortheVAPinterfacewithwhichthey 
areassociated.TheaccesspointonlyallowstraffictaggedwithcorrectVLAN 
IDstobeforwardedtoassociatedclientsoneachVAPinterface.
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◆ When VLAN supportis enabled ontheaccesspoint, trafficpassed tothewired 
networkistaggedwiththeappropriateVLANID.WhenanEthernetportonthe
accesspointisconfiguredasaVLANmember,trafficreceivedfromthewired