Juniper交换路由器QOS.docx
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Juniper交换路由器QOS.docx
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Juniper交换路由器QOS
QoSConfigurationExamples>QoSParameterConfigurationforControllingSubscriberBandwidth
QoSParameterConfigurationforControllingSubscriberBandwidth
Thisexampleillustrateshowtouseparameterstocontroltheminimumandmaximumbandwidthofasubscriber.TheexampleincludesproceduresforbothQoSadministratorsandQoSclients.
ThroughQoSparameterdefinitions,theQoSadministratordefinesaQoSschedulerhierarchythatcorrespondstothephysicalnetworktopologyshowninFigure 43.
Figure43:
PhysicalNetworkTypology
TheS-VLANschedulernodescorrespondtotheDSLAMinthephysicalnetworktopology;theVLANschedulernodescorrespondtothesubscribers.
Figure 44displaystheQoSschedulerhierarchythattheQoSclientcreateswhenconfiguringadifferentserviceforeachsubscriber.
Figure44:
QoSSchedulerHierarchy
ForSubscriber1,theQoSclientconfiguresabasicbest-effortdataservice,withamaximumrateof2 Mbps,andassignsaschedulerweightvalueof1.
ForSubscriber2,theQoSclientconfiguresabasictriple-playserviceconsistingofvoice,video,andbest-effortdataservices.Thisserviceenablesthesubscribertotransmitupto6 Mbpsofcombinedvoice,video,andbest-effortdatatraffic.Theservicelimitsvideotrafficto2 Mbpsandenableslow-latencybandwidthforone100 Kbpsvoicecall.TheQoSclientthenassignsthissubscriberaschedulerweightvalueof3,enablingthissubscribertoclaimuptothreetimesthebandwidththanthebasicdataserviceconfiguredforSubscriber1.
ForSubscriber3,theQoSclientconfiguresanenhancedtriple-playserviceconsistingofvoice,videoandbest-effortdataservices.Thisenhancedtriple-playserviceenablesthesubscribertotransmitupto8 Mbpsofcombinedvoice,video,andbest-effortdatatraffic.Thisservicelimitsvideotrafficto3 Mbpsandenableslow-latencybandwidthforuptothree100 Kbpsvoicecalls.TheQoSclientthenassignsthissubscriberaschedulerweightvalueof6,enablingthissubscribertoclaimupto6timesthebandwidthofthebasicdataservicesubscriberconfiguredforSubscriber1,anduptotwicethebandwidthofthebasictriple-playsubscriberconfiguredforSubscriber2.
ProcedureforQoSAdministrators
ThissectiondescribestheprocedurestoconfiguretheschedulerhierarchyshowninFigure 44throughQoSparameters.
ConfiguringTrafficClassesandTrafficClassGroups
TheQoSadministratorconfigurestrafficclassesandtraffic-classgroupsforbest-effortdata,video,andvoiceservices.
1.Configurethetrafficclasses.
a.Configurethetrafficclassnamedbest-effort.
b.Configurethetrafficclassnamedvideo.
c.Configurethetrafficclassnamedvoice.
d.Enablethevoicetrafficclasstoprovideastrictprioritytreatmentthroughoutthefabric.
e.host1(config)#traffic-classbest-effort
f.host1(config-traffic-class)#exit
g.
h.host1(config)#traffic-classvideo
i.host1(config-traffic-class)#exit
j.
k.host1(config)#traffic-classvoice
l.host1(config-traffic-class)#fabric-strict-priority
m.host1(config-traffic-class)#exit
n.
1.Configureatraffic-classgroupforlow-latencyexpeditedforwarding(EF)andaddthevoicetrafficclassintothetraffic-classgroupEF.
a.ConfiguretheEFtraffic-classgroupwithstrict-priorityscheduling.
b.Addthevoicetrafficclasstothetraffic-classgroup.
c.host1(config)#traffic-class-groupEFauto-strict-priority
d.host1(config-traffic-class-group)#traffic-classvoice
e.host1(config-traffic-class-group)#exit
f.
Theremainingtrafficclasses,best-effortandvideo,remaininthedefaulttraffic-classgroup.
ConfiguringtheParameterDefinitions
Afterconfiguringthetrafficclassesandtraffic-classgroups,theQoSadministratorconfigurestheparameterdefinitionsforSubscribers1,2,and3.
1.Configureaparameterdefinitionforthemaximumsubscriberbandwidth.
a.Configuretheparameterdefinitionnamedmax-subscriber-bandwidth.
b.EnabletheparametertocontrolVLANs.
c.EnabletheparametertohaveinstancescreatedonVLANsubinterfaces.
d.Specifythevalidrangeofthisparameteras512 Kbps-8 Mbps.
e.host1(config)#qos-parameter-definemax-subscriber-bandwidth
f.host1(config-qos-parameter-define)#controlled-interface-typevlan
g.host1(config-qos-parameter-define)#instance-interface-typevlan
h.host1(config-qos-parameter-define)#range5120008192000
i.host1(config-qos-parameter-define)#exit
j.
1.Configureaparameterdefinitionforasubscriber'sweightinthehierarchicalround-robin(HRR)scheduler.Thisparameterisusedtoprovidedifferentschedulerweightsforeachofthethreeserviceofferings.
a.Configuretheparameterdefinitionnamedsubscriber-weight.
b.EnabletheparametertocontrolVLANs.
c.EnabletheparametertohaveinstancescreatedonVLANsubinterfaces.
d.Specifythevalidrangeoft
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