CCIP-v2 2 pptQOS22S07L04

TrafficPolicingandShaping,ConfiguringClass-BasedShapingonFrameRelayInterfaces,FrameRelayRefresher,FrameRelayexplicitcongestionnotificationFECNForwardExplicitCongestionNotificationBECNBackwardExplicitCongestionNotificationSetbytheFrameRelayswitchtonotifyanenddeviceofcongestioninthenetworkImplicitcongestionnotificationProvidestoasignaltheFrameRelaynetworktodeterminewhichframestodiscardinpreferencetotheirframesDEbit,FrameRelayCongestionControl,FrameRelayswitchdetectscongestiononoutputqueueandinforms:ThereceiverbysettingtheFECNbitonforwardedframesThesourcebysettingtheBECNbitonframesgoingintheoppositedirection,FrameRelayCongestionAdaptation,Class-basedshapingcanadaptdynamicallytoavailableFrameRelaybandwidthbyintegratingBECNsignals:ThebitrateisreducedwhenBECNpacketsarereceivedtoreducethedataflowthroughacongestedFrameRelaynetwork.Thebitrateisgraduallyincreasedwhenthecongestionisnolongerpresent(BECNpacketsarenolongerreceived).,FECNtoBECNPropagation,ConfiguringFrameRelayAdaptiveClass-BasedShaping,shapeadaptivemin-rate,router(config-pmap-c)#,AdaptstheshapingratewhenBECNbitsarereceived.min-rate:EachBECNbitcausestheshapingratetobereducedtothree-quartersofthepreviousratebutnotbelowthemin-rate.ThiscommandhaseffectonlyifusedonFrameRelayinterfaces.,shapefecn-adapt,router(config-pmap-c)#,RespondstoFECNbitsbycreatingtestframesintheoppositedirectionwiththeBECNbitset.,policy-mapchild-cbwfqclassinteractivebandwidth32classbulkbandwidth24!policy-mapparent-shapeclassclass-defaultshapeaverage192000shapeadaptive96000service-policychild-cbwfq,interfaceserial0/0encapsulationframe-relay!interfaceserial0/0.1point-to-pointipaddress192.168.1.1255.255.255.0frame-relayinterface-dlci100classshape!map-classframe-relayshapeservice-policyoutputparent-shape,ThisfeaturewasalreadyavailableforroutersintheCisco7500andaboveproductrangeandbecameavailableonlowerendplatforms(Cisco1700series,2500series,2600series,3620router,3631router,3640router,3660router,3725router,3745router,7200series,and7400series)inRelease12.2(13)T.,MQC-BasedFrameRelayTrafficShapingExample,router#showpolicy-mapinterfaceSerial0/0.1:DLCI100-Service-policyoutput:parent-shape(2811)Class-map:class-default(match-any)(2837/0)16packets,1666bytes30secondofferedrate0bps,droprate0bpsMatch:any(2841)TrafficShapingTargetByteSustainExcessIntervalIncrementAdaptRateLimitbits/intbits/int(ms)(bytes)Active19200019687872787241984-QueuePacketsBytesPacketsBytesShapingDepthDelayedDelayedActive0883300no.cont,MonitoringMQC-BasedFrameRelayTrafficShaping,Service-policy:child-cbwfq(2813)Class-map:interactive(match-all)(2815/6)0packets,0bytes30secondofferedrate0bps,droprate0bpsMatch:protocoltelnet(2819)WeightedFairQueuingOutputQueue:Conversation41Bandwidth32(kbps)MaxThreshold64(packets)(pktsmatched/bytesmatched)0/0(depth/totaldrops/no-bufferdrops)0/0/0outputomitted,MonitoringMQC-BasedFrameRelayTrafficShaping(Cont.),policy-mapchild-cbwfqclassinteractivebandwidth32classbulkbandwidth24!policy-mapparent-shapeclassclass-defaultshapeaverage192000shapeadaptive96000service-policychild-cbwfq,interfaceSerial0/1ipaddress10.1.1.1255.255.255.0encapsulationframe-relayframe-relayclassshapeframe-relaymapip10.1.1.2102broadcastframe-relaymapip10.1.1.3103broadcastframe-relaymapip10.1.1.4104broadcast!map-classframe-relayshapeservice-policyoutputparent-shape,MQC-BasedFrameRelayTrafficShapingExampleonMultipointMainInterface,Summary,TheFECN,BECN,andDEbitsintheQ.922headeroftheframeprovidein-bandcongestioncontrol.AFrameRelayswitchdetectingcongestionontheoutputqueueinformsthereceiverbysettingtheFECNbitonforwardedframes;thereceiverreactsbysettingtheBECNbitonframesgoingtowardthesource.Class-basedshapingcanadaptdynamicallytoavailableFrameRelaybandwidthbyintegratingBECNsignals.FECN-to-BECNpropagationenablesarouterFrameRelayinterfacetoreflectreceivedFECNbitsasBECNinQ.922TestResponsemessagesifnodataframesaresentinthebackwarddirection.,Summary(Cont.),Theshapeadaptivecommandconfigurestheclass