D-Link DWS-4026 [330/741] Trust mode configuration

ConfiguringClassofService

D-Link UnifiedWiredandWirelessAccessSystem

November2011 Page330

D‐LinkUWSUserManual

Todisplaythepage,clickLAN>QoS >ClassofService > 802.1pPriorityMappinginthenavigationtree.

Figure219:802.1pPriorityMapping

•Ifyoumakeanychangestothepage,clickSubmittoapplythenewvaluestothesystem.

TrustModeConfiguration

UsetheTrustModeConfigurationpagetosettheclassofservicetrustmodeofaninterface.Eachportinthe

switchcanbeconfiguredtotrustoneofthepacketfields(802.1porIPDSCP),ortonottrustanypacket’s

prioritydesignation(untrustedmode).Iftheportissettoatrus

tedmode,itusesamappingtableappropriate

forthetrustedfieldbeingused.ThismappingtableindicatestheCoSqueuetowhichthepacketshouldbe

forwardedontheappropriateegressport(s).Ofcourse,thetrustedfieldmustexistinthepacketforthe

mappingtabletobeofan

yuse,sotherearedefaultactionsperformedwhenthisisnotthecase.Theseactions

involvedirectingthepackettoaspecificCoSlevelconfiguredfortheingressportasawhole,basedonthe

existingportdefaultpriorityasmappedtoatrafficclassbythecurrent80

2.1pmappingtable.

Table198:802.1pPriorityMapping

Field Description

Interface Selectstheinterfacetowhichtheclassofserviceconfigurationisapplied.

802.1pPriority Displaysthe802.1pprioritytobemapped.Prioritygoesfromlow(0)tohigh

(7).Forexample,trafficwithapriorityof0isformostdatatrafficandissent

using“besteff ort.”Trafficwithahighe

rpriority,suchas6,mightbetime‐

sensitivetraffic,suchasvoiceorvideo.

TrafficClass Thetraf ficclassisthehardwarequeueforaport.Highertrafficclassvalues

indicateahigherqueueposition.Beforetrafficinalowerqueueissent,itmust

waitfortrafficinhigherqueue

stobesent.Tochangethedefaultpriority‐to‐

queuemapping,selectanewtrafficclassvaluefromthedrop‐downmenu.