带宽控制-分层标记桶(HTB)介绍--Ros官方文档翻译

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1、IntroductiontoHTBHTB(HierarchicalTokenBucket)isaclassfulqueuingdisciplinethatisusefulforapplyingdifferenthandlingfordifferentkindsoftraffic.Generally,wecansetonlyonequeueforaninterface,butinRouterOSqueuesareattachedtothemainHierarchicalTokenBucket(HTB)andthushavesomepropertiesderivedfromthat

2、parentqueue.Forexample,wecansetamaximumdatarateforaworkgroupandthendistributethatamountoftrafficbetweenthemembersofthatworkgroup.HTBqdiscindetail:HTB介绍HTB（分层标记桶）是一种有助于对不同类型的流实现不同处理的分级排队规则通常，我们可以为一个界面只设置一个队列，但在RouterOS中，队列附属于主HTB，从而带有一些来自父队列的属性。例如，我们可以为一个工作组设置最大传输率然后在工作组成员之间分配带宽。  HTBqdiscind

3、etail:HTB排队规则详述：HTBterms:·queuingdiscipline(qdisc)-analgorithmthatholdsandmaintainsaqueueofpackets.Itspecifiestheorderoftheoutgoingpackets(itmeansthatqueuingdisciplinecanreorderpackets).Qdiscalsodecideswhichpacketstodropifthereisnospaceforthem·filter-aprocedurethatclassifiespackets.Thefilter

4、isresponsibleforclassifyingpacketssothattheyareputinthecorrespondingqdiscs·level-positionofaclassinthehierarchy·innerclass-aclassthathasoneormorechild-classesattachedtoit.Innerclassesdonotstoreanypackets,buttheydotrafficshaping.Theclassalsodoesnothaveitsownpriority·leafclass-aclassthathasapa

5、rentbutdoesnothaveanychild-classes.Leafclassesarealwayslocatedatlevel0ofthehierarchy.Eachleafclasshasaqdisc,attachedtoit·selffeed-anobjectthatrepresentstheexitforthepacketsfromalltheclassesactiveatitslevelofthehierarchy.Itconsistsof8selfslots·selfslot-anelementofaselffeedthatcorrespondstoeac

6、hparticularpriority.Allclasses,activeatthesamelevel,ofonepriorityareattachedtooneselfslotthattheyareusingtosendpacketsoutthrough·activeclass(ataparticularlevel)-aclassthatisattachedtoaselfslotatthegivenlevel·innerfeed-similartoselffeedobject,whichconsistsofinnerselfslots,presentoneachinnercl

7、ass·innerfeedslot-similartoselfslot.EachinnerfeedconsistsofinnerslotswhichrepresentapriorityEachclasshasaparentandmayhaveoneormorechildren.Classesthatdonothavechildren,areputatlevel0,wherequeuesaremaintained,andarecalled'leafclasses'HTB术语：  排队规则（qd