QoS on RouterOS with Token Bucket - MikroTik · This license lets others remix, tweak, and build upon your work even for commercial purposes, as long as they credit you and license

QoS onRouterOS withTokenBucket

RouterOS v6.35

ValensRiyadi(Citraweb)@valensriyadi

MUM-KH-2017PhnomPenh

ValensRiyadi• MikroTik CertifiedEngineer

(MTCNA,MTCWE,MTCRE,MTCTCE,MTCUME,MTCINE)

• MikroTik CertifiedTrainersince2004,CertifiedConsultant,andAcademyCoordinator

• CEOforCitranet (WISP)andCitraweb (Mikrotik DistributorandSystemDeveloper)

• ManagerforIDNIC(IndonesiaNationalInternetRegistry)2009-2015

• ExpertonCyberCrime,DigitalForensic,ITforDisasterRelief,LiveStreaming

• Proudmemberof“RoutedWorld”community

2QoS onMulticore – Mikrotik Indonesia

QospadaRouterOSv6 3

MikroTik TrainingCenter• ThefirstMikroTik TrainingCenterinAsiaPasific since2004,morethen5500participants(237classes).

• Mikrotik AcademyCoordinator.

QospadaRouterOSv6 4

QoSonMulticore– MikrotikIndonesia 5

Mikrotik TrainingforIndonesiaSpecialForces

QoS concept

6Token Bucket– Mikrotik Indonesia

Whydoweneedtomanagebandwidth?

QoS onRouterOS

• MikroTik RouterOS isoneofthemostadvancedbandwidthmanagement,comparedtoanyotherbrand.

• Why?– AdvancedHTBconfiguration– Doublelimitation+Burst– Alotofoptionandparameterà packet-mark• Grouping,protocol,layer7,connectionsize,trafficdetection,etc

Token Bucket– Mikrotik Indonesia 7

Burst

Amechanismtobeabletoprovideadditionalbandwidthtoaparticularclientif:• Clientnotalwaysonmax-limit• Additionalbandwidthstillavailableonrelatedparentandinterface

Token Bucket– Mikrotik Indonesia 8

Happycustomer

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Burstwillsignificantlyimprovecustomerexperience

astheyfeeltheconnectionisfast

TokenBucket

• SinceRouterOS v6.35,MikroTik introduceTokenBucket.

• It’sbeenontheRouterOS engineforlongtime,butit’shiddenandstaticallysetto0.1.

• ConceptofTokenBucketalsoimplementedonLinux.

• Itworkslikeburstfeature,butmuchsimpler.

TokenBucket– MikrotikIndonesia 10

Winbox Configuration

TokenBucket– MikrotikIndonesia 11

TokenBucketAlgoritm

TokenBucket– MikrotikIndonesia 12http://wiki.mikrotik.com/wiki/Manual:HTB-Token_Bucket_Algorithm

Bucket

• Bucketcapacity isbucketsizeratio comparedtomax-limit.

• Example:–Max-limit=5Mbps– Bucketsizeration=3(max10)– Bucketcapacity=5*3=15Mbit

• Whenthecalculationstart,bucketisalwaysconsideredfulloftoken.

TokenBucket– MikrotikIndonesia 13

Tokenrate

TokenBucket– MikrotikIndonesia 14

token-rate=max-limit

iflimit-atonchild>max-limitonparent

token-rate=limit-at

ifburstisactiveandallowed

token-rate=burst-limit

TokenBucketAlgoritmIftraffic=token-rate AlltrafficwillbedeliveredIftraffic<token-rate Alltrafficwillbedelivered,and

tokenwillbeaddedtothebucket,asmuchasthedifferences

Iftraffic>token-rate Trafficwillbedelivered,andtokenwillbetakenfromthebucket,asmuchasthedifferences.Iftokenisnotenough/bucketisempty,trafficwillbedeliveredastoken-rate.

TokenBucket– MikrotikIndonesia 15

TokenBucketExample

• Max-limit=20M,Bucket-size=10àBucket-capacity=20*10=200Mbit

• Routerwilldeliveredadditional(aftertoken-rate)200Mbittrafficwithoutanylimitation.

• 30Mbpswillbedeliveredin…….seconds:

200/(30– 20)=200/10=20secondsTokenBucket– MikrotikIndonesia 16

BucketCapacity /(- )Actual

SpeedTokenRate

40Mbpswillbedeliveredin…….seconds:Second(s) Traffic TokenDeducted/

SpeedExceedTokenleftat

bucketSpeed

Delivered

0 0 200Mbit

1 40Mbps 20Mbit 180Mbit 40Mbps

2 40Mbps 20Mbit 160Mbit 40Mbps

3 40Mbps 20Mbit 140Mbit 40Mbps

4 40Mbps 20Mbit 120Mbit 40Mbps

5 40Mbps 20Mbit 100Mbit 40Mbps

6 40Mbps 20Mbit 80Mbit 40Mbps

7 40Mbps 20Mbit 60Mbit 40Mbps

8 40Mbps 20Mbit 40Mbit 40Mbps

9 40Mbps 20Mbit 20Mbit 40Mbps

10 40Mbps 20Mbit 0 40Mbps

11 40Mbps 0 0 20MbpsTokenBucket– MikrotikIndonesia 17

TokenBucketExample

• Afterthebucketempty,trafficwillbelimitedtotoken-rate(20M)

• Andifclientutilizelowerthentoken-rate,forexampleonly15Mbps,bucketwillbefulloftokensafter…..seconds:

200/(20– 15)=200/5=40secondsTokenBucket– MikrotikIndonesia 18

BucketCapacity /(- )Token

RateActualSpeed

Howaboutburst?

• Inburstcalculation,routerhavetorememberspeedperqueueinthelast(burst-time)seconds.

• Intoken-bucket,onlytoken-rateandnumberoftokensinbucketwillbeconsidered.

• Inhighloadapplication,tokenbucketmightbemoreefficent thenburst.Really?

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Comparation

• Istokenbucketreallymoreefficientthenburstsystem?

• It’sreallydifficulttotest:– CPUloadisnotonlyrelatedwithqueueconfiguration,butthesizeoftrafficdeliveredbyrouter

– Queueisveryefficient.500+simplequeuewith500mbpsonlymake1%CPUload.

TokenBucket– MikrotikIndonesia 20

WithSimpleQueue

It’sonly1%ofCPULoadwithSimpleQueue

QoS onMulticore – Mikrotik Indonesia 21

Letsuse(not)sofastrouterboard!

TokenBucket– MikrotikIndonesia 22

RB230Token Bucket– Mikrotik Indonesia 23

TokenBucket– MikrotikIndonesia 24

RB44GV

TokenBucket– MikrotikIndonesia 25

Forbandwidthtest

TokenBucket– MikrotikIndonesia 26

bridge

UseIPfirewall

Bridgeports

BandwidthtestonCCRTokenBucket– MikrotikIndonesia 27

WithoutqueueTokenBucket– MikrotikIndonesia 28

TokenBucket– MikrotikIndonesia 29

TokenBucket– MikrotikIndonesia 30

Withqueue

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Burst

TokenBucket

Withburst

withtokenbucket

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Conclusions

• TokenBucketisalternativestoburstsystem• Differenceofefficiencybetweenbothsystemisstillverysmall.

Token Bucket– Mikrotik Indonesia 33

ThankyouCommentsandsuggestions:

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