CISCO官方配置手册QOS.pdf

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1、QualityofServiceCommandsThefollowingarequalityofservice(QoS)commands.Thecommandsarearrangedalphabetically.CiscoIOSQualityofServiceSolutionsCommandReferenceQR-3QualityofServiceCommandsaccess-listrate-limitaccess-listrate-limitToconfigureanaccesslistforusewithcommi

2、ttedaccessrate(CAR)policies,usetheaccess-listrate-limitcommandinglobalconfigurationmode.Toremovetheaccesslistfromtheconfiguration,usethenoformofthiscommand.access-listrate-limitacl-index{precedence

3、mac-address

4、exp

5、maskmask}noaccess-listrate-limitacl-index{precede

6、nce

7、mac-address

8、exp

9、maskmask}SyntaxDescriptionacl-indexAccesslistnumber.Toclassifypacketsby•IPprecedence,useanynumberfrom1to99•MACaddress,useanynumberfrom100to199•MultiprotocolLabelSwitching(MPLS)experimentalfield,useanynumberfrom200to299precedenceIPprecedence.Va

10、lidvaluesarenumbersfrom0to7.mac-addressMACaddress.expMPLSexperimentalfield.Validvaluesarenumbersfrom0to7.maskmaskMask.UsethisoptionifyouwanttoassignmultipleIPprecedencesorMPLSexperimentalfieldvaluestothesamerate-limitaccesslist.DefaultsNoCARaccesslistsareconfigur

11、ed.CommandModesGlobalconfigurationCommandHistoryReleaseModification11.1CCThiscommandwasintroduced.12.1(5)TThiscommandnowincludesanaccesslistbasedontheMPLSexperimentalfield.12.2(2)TThiscommandwasintegratedintoCiscoIOSRelease12.2(2)T.12.2(4)TThiscommandwasimplement

12、edontheCiscoMGX8850switchandtheMGX8950switchwithaCiscoMGXRPM-PRcard.12.2(4)T2ThiscommandwasimplementedontheCisco7500series.UsageGuidelinesUsethiscommandtoclassifypacketsbythespecifiedIPprecedence,MACaddress,orMPLSexperimentalfieldvaluesforaparticularCARaccesslist

13、.YoucanthenapplyCARpolicies,usingtherate-limitcommand,toindividualrate-limitaccesslists.Whenpacketsinanaccesslistareclassifiedinthismanner,thepacketswithdifferentIPprecedences,MACaddresses,orMPLSexperimentalfieldvaluesaretreateddifferentlybytheCARprocess.Youcansp

14、ecifyonlyonecommandforeachrate-limitaccesslist.Ifyouenterthiscommandmultipletimesusingthesameaccesslistnumber,thenewcommandoverwritesthepreviouscommand.CiscoIO