rate-limit详解（detailed explanation of rate-limit）

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1、rate-limit详解（Detailedexplanationofrate-limit）Detailedexplanationofrate-limit1.openCEFinglobalmode:Router(config)#ipCEFCEF(Ciscoexpressforwarding,Ciscoexpressexchange)2.definestandardsorextendaccesslists:Router(config)#access-list2permit192.168.6.00.0.0.2553.r

2、ate-limitinthehopeoflimitingport:Rounter(config-if)#rate-limitoutputaccess-group21280001600016000conform-actiontransmitexceed-actiondropThecommandformatofrate-limit:#rate-limit{input

3、output}[access-groupnumber]BPSburst-normalburst-maxconform-actionactionexcee

4、d-actionactionInput

5、output:Thisisthedefinitionofdataflowdirection.Access-groupnumber:thedefinitionofaccesslistnumber.BPS:definetheflowratelimit,theunitisbps.Burst-normalburst-max:thedefinitionofdatasize,generallyuse80001600032000bytes,whenarrivingdataexceedst

6、hiscapacity,willtriggeranaction,discardingorforwarding,soastoachievethepurposeofspeedlimit.Conform-actionandexceed-action:processingstrategiesfortrafficbelowtheratelimitandoverratetraffic,respectively.Action:treatmentstrategies,includingdropandtransmitetc..Co

7、nfiguringthespecifiedaccessrateandthedistributedaccessratepolicy,youcanconfigurethecommandusingtherate-limitportRemovetheratelimitconfiguration,andremovenointheoriginalorder.Instruction:Rate-limit{inputoutput}[access-group[rate-limit]acl-index]BPSburst-

8、Norma

9、lburst-maxconform-actionconform-actionexceed-actionexceed-actionNorate-limit{inputoutput}[access-group[rate-limit]acl-index]BPSburst-

10、Normalburst-maxconform-actionconform-actionexceed-actionconform-actionParameterDescription:input????attheentrancetoacceptapac

11、ketsapplicationaccessratestrategyOutput??intheexportofpacketsapplicationtosendavisitratestrategyAccess-groupoptional,accessratepolicyisappliedonthespecifiedaccesscontrollist-usuallyinthespecifiedIPandApplicationTheuseofspeedlimitsTherate-limitoption,thisisthe

12、rate-limitaccesscontrolstrategyAcl-indexoptional,Accesslistnumber.TheaveragerateofBPS(bits/,8kbptimespersecond)Themaximumrateofburst-normalTheminimumvalueistheBPSdividedby2000.Themaximumr