Zte ZXR10 5900 Series - Chapter 8 QoS Configuration; QoS Overview

Chapter8
QoSConfiguration
TableofContents
QoSOverview...................................................................69
ConguringQoS................................................................73
QoSCongurationExample.................................................78
QoSMaintenanceandDiagnosis..........................................80
QoSOverview
Traditionalnetworksprovidebest-effortservice,treatingallpack-
etsidenticallyandhandlingthemwiththerstin,rstout(FIFO)
policy.Thisservicepolicydeliversthepacketstotheirdestination
asitcan,withoutanyassuranceandguaranteeforreliabilityand
deliverydelay,andsoonforpacketforwarding.
Withthecontinuousemergenceofnewapplicationsanewrequire-
mentfornetworkservicequalityisraisedbecausethetraditional
networkatthebesteffortcannotsatisfytherequirementforap-
plications.Forexample,theusercannotusetheVoIPserviceand
real-timeimagetransmissionnormallyifpackettransferdelayis
toolong.Tosolvetheproblem,providethesystemwiththecapa-
bilityofsupportingQoS.
QoSisdesignedtoprovidedifferentqualitiesofservicefordiffer-
entdemandsfromvariousapplications,suchas,providingspecic
bandwidth,reducingpacketlossratio,shorteningpackettransfer
delayanddelay-jitter .Toachievetheabovepurposes,QoSoffers
thefollowingfunctions:
1.Trafcclassication
2.TrafcPolicing
3.TrafcShaping
4.Queueschedulinganddefault802.1pPriority
5.Redirectionandpolicyrouting
6.PriorityMark
7.FlowMirroring
8.Trafcstatistics
TrafficClassification
Trafcreferstopacketspassingthroughswitch.Trafcclassica-
tionistheprocessofdistinguishingonekindoftrafcfromanother
byexaminingtheeldsinthepacket.
CondentialandProprietaryInformationofZTECORPORATION69