Nyob rau hauv qhov xwm txheej NPB daim ntawv thov, qhov teeb meem nyuaj tshaj plaws rau cov thawj coj yog pob ntawv poob los ntawm qhov congestion ntawm mirrored packets thiab NPB tes hauj lwm. Pob ntawv poob hauv NPB tuaj yeem ua rau cov tsos mob hauv qab no hauv cov cuab yeej tshuaj xyuas rov qab:
- Lub tswb raug tsim tawm thaum APM cov kev pabcuam kev soj ntsuam kev ua tau zoo txo qis, thiab qhov kev ua tiav kev ua tiav txo qis
- Lub NPM network kev ua tau zoo saib xyuas qhov ntsuas tshwj xeeb lub tswb raug tsim tawm
- Lub kaw lus saib xyuas kev ruaj ntseg tsis tuaj yeem ntes cov kev tawm tsam hauv lub network vim qhov tshwm sim tsis ua haujlwm
- Poob ntawm kev pabcuam tus cwj pwm tshawb xyuas cov xwm txheej tsim los ntawm kev pabcuam kev tshuaj xyuas
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Raws li lub hauv paus ntawm kev ntes thiab kev faib khoom rau kev saib xyuas Bypass, qhov tseem ceeb ntawm NPB yog qhov tseeb ntawm tus kheej. Nyob rau tib lub sijhawm, txoj hauv kev uas nws ua cov ntaub ntawv pob khoom sib txawv heev los ntawm kev hloov pauv hauv lub network ib txwm muaj, thiab kev tswj xyuas cov tsheb thauj mus los ntawm ntau cov kev pabcuam nyob hauv network tsis muaj feem xyuam rau NPB. Yuav ua li cas los daws NPB pob ntawv poob, cia peb pib los ntawm lub hauv paus ua rau kev tsom xam ntawm pob ntawv poob kom pom nws!
NPB/TAP Packet Loss Congestion Root Cause Analysis
Ua ntej tshaj plaws, peb txheeb xyuas txoj kev tsheb ciav hlau tiag tiag thiab daim ntawv qhia kev sib raug zoo ntawm lub kaw lus thiab cov khoom nkag thiab tawm ntawm qib 1 lossis qib NPB network. Tsis muaj teeb meem dab tsi ntawm lub network topology NPB cov ntaub ntawv, raws li kev sib sau ua ke, muaj ntau-rau-ntau cov kev tawm tswv yim thiab kev sib raug zoo ntawm "kev nkag" thiab "tso tawm" ntawm tag nrho cov kab ke.
Tom qab ntawd peb saib cov qauv kev lag luam ntawm NPB los ntawm kev xav ntawm ASIC chips ntawm ib qho khoom siv:
Feature 1: "tsheb ciav hlau" thiab "lub cev interface tus nqi" ntawm cov tswv yim thiab cov zis interfaces yog asymmetrical, uas ua rau ib tug loj tus naj npawb ntawm micro-bursts yog inevitable tshwm sim. Nyob rau hauv cov xwm txheej ntau-rau-ib lossis ntau-rau-ntau txoj kev sib sau ua ke, lub cev tus nqi ntawm cov zis interface feem ntau yog me dua li tag nrho lub cev tus nqi ntawm cov khoom nkag. Piv txwv li, 10 channel ntawm 10G sau thiab 1 channel ntawm 10G tso zis; Nyob rau hauv ib qho kev xa tawm ntau qhov xwm txheej, tag nrho NPBBS tuaj yeem pom tag nrho.
Feature 2: ASIC chip cache cov peev txheej muaj tsawg heev. Nyob rau hauv cov nqe lus ntawm tam sim no nquag siv ASIC nti, nti nrog 640Gbps pauv peev xwm muaj cache ntawm 3-10Mbytes; Ib lub peev xwm 3.2Tbps muaj lub cache ntawm 20-50mbytes. Xws li BroadCom, Barefoot, CTC, Marvell thiab lwm cov tuam txhab ntawm ASIC chips.
Feature 3: Cov txheej txheem kawg-rau-kawg PFC ntws tswj mechanism tsis siv rau NPB cov kev pabcuam. Lub hauv paus tseem ceeb ntawm PFC ntws tswj mechanism yog kom ua tiav qhov kawg-rau-kawg kev tawm tswv yim kev tawm tsam, thiab thaum kawg txo qis kev xa cov pob ntawv mus rau cov txheej txheem txheej txheem ntawm kev sib txuas lus kawg kom txo tau qhov kev sib tsoo. Txawm li cas los xij, pob ntawv qhov chaw ntawm NPB cov kev pabcuam yog cov pob ntawv mirrored, yog li cov txheej txheem kev ua haujlwm tuaj yeem tsuas yog muab pov tseg lossis cached.
Cov hauv qab no yog cov tsos ntawm ib txwm micro-tawg tawg ntawm qhov ntws nkhaus:
Noj 10G interface ua piv txwv, nyob rau theem thib ob daim duab qhia kev tsheb khiav tsheb, tus nqi tsheb khiav ceev ntawm 3Gbps ntev. Ntawm daim ntawv txheeb xyuas micro millisecond, cov tsheb khiav ceev (MicroBurst) tau zoo heev tshaj 10G interface lub cev tus nqi.
Cov tswv yim tseem ceeb rau Mitigating NPB Microburst
Txo qhov cuam tshuam ntawm asymmetric lub cev interface tus nqi mismatch- Thaum tsim lub network, txo qis asymmetric input thiab tso tawm lub cev sib cuam tshuam tus nqi ntau li ntau tau. Ib txoj hauv kev yog siv tus nqi siab dua uplink interface txuas, thiab zam qhov tsis sib xws ntawm lub cev sib cuam tshuam (piv txwv li, luam 1 Gbit / s thiab 10 Gbit / s tsheb tib lub sijhawm).
Txhim kho txoj cai tswj hwm cache ntawm NPB kev pabcuam- Txoj cai tswj hwm cache uas siv tau rau cov kev pabcuam hloov pauv tsis muaj feem cuam tshuam rau kev xa mus rau kev pabcuam NPB. Txoj cai tswj hwm cache ntawm kev lav zoo li qub + Dynamic sib koom yuav tsum tau ua raws li cov yam ntxwv ntawm NPB kev pabcuam. Txhawm rau txo qhov cuam tshuam ntawm NPB microburst nyob rau hauv kev txwv tam sim no cov khoom siv hluav taws xob ib puag ncig.
Ua raws li kev tswj xyuas kev tswj xyuas tsheb khiav- Ua qhov tseem ceeb ntawm kev tsim tsheb thauj mus los engineering kev pabcuam kev faib ua haujlwm raws li kev faib tsheb. Xyuas kom muaj kev pabcuam zoo ntawm cov kev pabcuam tseem ceeb sib txawv raws li qeb queue bandwidths, thiab xyuas kom meej tias cov neeg siv cov kev pabcuam tsheb thauj khoom tuaj yeem xa mus yam tsis muaj pob ntawv poob.
Ib qho kev daws teeb meem tsim nyog txhim kho cov pob ntawv caching muaj peev xwm thiab muaj peev xwm tsim kev tsheb khiav- Sib koom ua ke cov kev daws teeb meem los ntawm ntau yam kev siv los nthuav cov pob ntawv caching muaj peev xwm ntawm ASIC nti. Los ntawm shaping qhov ntws ntawm qhov chaw sib txawv, micro-burst ua micro-uniform flow curve tom qab shaping.
Mylinking ™ Micro Burst Traffic Management Solution
Scheme 1 - Network-optimized cache tswj lub tswv yim + network-wide cais kev pabcuam zoo ua ntej tswj hwm
Cache tswj lub tswv yim optimized rau tag nrho lub network
Raws li kev nkag siab tob ntawm NPB cov yam ntxwv kev pabcuam thiab cov xwm txheej ua lag luam ntawm ntau tus neeg siv khoom, Mylinking ™ cov khoom siv tsheb thauj mus los siv cov txheej txheem "zoo li qub + kev sib koom ua ke" NPB cache tswj lub tswv yim rau tag nrho lub network, uas muaj ib qho Cov txiaj ntsig zoo ntawm kev tswj hwm kev khiav tsheb khiav hauv cov ntaub ntawv ntawm ntau cov asymmetric input thiab output interfaces. Lub microburst kam rau ua tau paub txog qhov siab tshaj plaws thaum tam sim no ASIC nti cache raug kho.
Microburst Processing Technology - Kev tswj raws li kev lag luam ua ntej
Thaum lub tsheb thauj neeg ntes tau xa mus rau nws tus kheej, nws kuj tseem tuaj yeem ua qhov tseem ceeb raws li qhov tseem ceeb ntawm cov cuab yeej ntsuas rov qab los yog qhov tseem ceeb ntawm cov ntaub ntawv kev pabcuam nws tus kheej. Piv txwv li, ntawm ntau cov cuab yeej tshuaj ntsuam xyuas, APM / BPC muaj qhov tseem ceeb dua li kev soj ntsuam kev nyab xeeb / kev ruaj ntseg cov cuab yeej vim tias nws koom nrog kev saib xyuas thiab kev tshuaj xyuas ntawm ntau cov ntaub ntawv qhia txog kev lag luam tseem ceeb. Yog li, rau qhov xwm txheej no, cov ntaub ntawv xav tau los ntawm APM / BPC tuaj yeem txhais tau tias yog qhov tseem ceeb, cov ntaub ntawv xav tau los ntawm kev saib xyuas kev ruaj ntseg / kev nyab xeeb kev soj ntsuam cov cuab yeej tuaj yeem txhais tau tias yog qhov tseem ceeb nruab nrab, thiab cov ntaub ntawv xav tau los ntawm lwm cov cuab yeej tshuaj ntsuam tuaj yeem txhais tau tias qis. qhov tseem ceeb. Thaum cov ntaub ntawv sau cov pob ntawv nkag mus rau hauv qhov chaw nres nkoj, qhov tseem ceeb yog txhais raws li qhov tseem ceeb ntawm cov pob ntawv. Cov pob ntawv ntawm qhov tseem ceeb dua yog qhov nyiam xa mus tom qab cov pob ntawv ntawm qhov tseem ceeb dua raug xa mus, thiab cov pob ntawv ntawm lwm qhov tseem ceeb raug xa mus tom qab cov pob ntawv ntawm qhov tseem ceeb dua raug xa mus. Yog tias pob ntawv ntawm qhov tseem ceeb dua tseem tuaj txog, pob ntawv ntawm qhov tseem ceeb dua yog qhov zoo dua xa mus. Yog tias cov ntaub ntawv tawm tswv yim tshaj qhov muaj peev xwm xa tawm ntawm qhov chaw nres nkoj tso zis rau lub sijhawm ntev, cov ntaub ntawv ntau dhau tau khaws cia rau hauv cache ntawm lub cuab yeej. Yog tias lub cache puv, lub cuab yeej nyiam muab cov pob ntawv ntawm qhov kev txiav txim qis dua. Qhov kev tswj hwm qhov tseem ceeb no ua kom ntseeg tau tias cov cuab yeej tshuaj ntsuam xyuas tseem ceeb tuaj yeem tau txais cov ntaub ntawv tseem ceeb ntawm cov tsheb khiav yuav tsum tau siv rau kev tshuaj xyuas hauv lub sijhawm.
Microburst Processing Technology - kev faib tawm kev lees paub mechanism ntawm tag nrho cov kev pabcuam network zoo
Raws li pom nyob rau hauv daim duab saum toj no, cov cuab yeej kev faib hluav taws xob yog siv los txheeb xyuas cov kev pabcuam sib txawv ntawm txhua yam khoom siv ntawm txheej txheej nkag, txheej txheej / txheej txheej, thiab cov txheej txheem tso tawm, thiab qhov tseem ceeb ntawm cov ntim ntim tau rov cim dua. SDN maub los muab txoj cai tseem ceeb ntawm kev tsheb khiav hauv qhov nruab nrab thiab siv rau cov khoom xa mus. Tag nrho cov khoom siv uas koom nrog hauv kev sib txuas lus tau teeb tsa rau qhov sib txawv qhov tseem ceeb raws li qhov tseem ceeb ntawm cov pob khoom. Nyob rau hauv txoj kev no, me me-tsheb thauj mus los ua ntej pob khoom tuaj yeem ua tiav xoom pob ntawv poob. Siv tau zoo daws cov teeb meem poob ntawm APM kev saib xyuas thiab kev pabcuam tshwj xeeb tshawb xyuas cov kev pabcuam tsheb khiav.
Kev daws 2 - GB-theem Expansion System Cache + Traffic Shaping Scheme
GB Level System Extended Cache
Thaum lub cuab yeej ntawm peb lub tsheb thauj mus los tau muaj peev xwm ua tau zoo tshaj plaws, nws tuaj yeem qhib tau qee qhov chaw hauv lub cim xeeb (RAM) ntawm lub cuab yeej raws li lub ntiaj teb Buffer ntawm lub cuab yeej, uas zoo heev txhim kho qhov tsis muaj peev xwm ntawm lub cuab yeej. Rau ib qho cuab yeej tau txais, tsawg kawg GB muaj peev xwm muab tau raws li qhov chaw cache ntawm cov cuab yeej nrhiav tau. Cov thev naus laus zis no ua rau Buffer muaj peev xwm ntawm peb cov tsheb thauj mus los tau txais cov cuab yeej siv ntau pua lub sijhawm siab dua li ntawm cov khoom siv ib txwm muaj. Nyob rau hauv tib tus nqi xa mus, qhov siab tshaj plaws micro tawg lub sijhawm ntawm peb cov khoom siv tsheb thauj mus los yuav ntev dua. Qib millisecond txhawb nqa los ntawm cov khoom siv niaj hnub tau hloov kho mus rau qib thib ob, thiab lub sijhawm micro-burst uas tuaj yeem tiv taus tau nce ntau txhiab zaus.
Multi-queue Traffic Shaping Capability
Microburst Processing Technology - ib qho kev daws teeb meem raws li loj Buffer Caching + Traffic Shaping
Nrog rau lub peev xwm loj tsis txaus, cov ntaub ntawv tsheb khiav los ntawm micro-burst yog cached, thiab cov tsheb sib txuas tshuab yog siv nyob rau hauv qhov kev sib tshuam tawm kom ua tiav cov txiaj ntsig zoo ntawm pob ntawv rau cov cuab yeej tshuaj ntsuam. Los ntawm kev siv cov thev naus laus zis no, pob ntawv poob qhov tshwm sim tshwm sim los ntawm micro-burst yog tsim los daws.
Post lub sij hawm: Feb-27-2024
