Lub 400GBASE Quad Small Form-Factor Pluggable Double Density (QSFP-DD) portfolio muab cov neeg siv khoom ntau yam ntawm super high-density transceiver modules thiab qhov yooj yim ntawm 400 Gigabit Ethernet connectivity xaiv rau cov ntaub ntawv chaw, kev ua haujlwm siab hauv kev sib txuas, kev lag luam core thiab faib cov khaubncaws sab nraud povtseg, thiab daim ntawv thov kev pabcuam. QSFP-DD modules yog peb tiam tshiab ntawm 400G transceiver modules raws li QSFP-DD daim ntawv foos.
QSFP-DD (Quad Small Form Factor Pluggable-Double Density) ob-density plaub-channel me me pluggable pob yog ib qho kev kub ceev pluggable module pob uas txhais los ntawm QSFP-DD MSA pawg. Nws yog thawj qhov kev xaiv rau 400G optical module pob. Lub chaw tuaj yeem loj hlob zoo thiab nthuav dav huab cua raws li xav tau.
Nta
Nws yog pem hauv ntej thiab rov qab sib xws rau QSFP, tau tshaj QSFP28 optical modules thiabAOC/DAC, lwm.
Siv 8-channel hluav taws xob sib cuam tshuam, txhua qhov channel tus nqi nce mus txog 25Gb / s (NRZ hloov kho) lossis 50Gb / s (PAM4 kev hloov pauv), muab txog 200Gb / s lossis 400Gb / s kev daws teeb meem. QSFP-DD tuaj yeem ua tiav txog li 14.4Tb / s aggregate bandwidth hauv ib qho kev hloov pauv.
Siv SMT (Surface-Mount Technology) connectors thiab 1xN tawb, tawb tsim optimization thiab module vaj tsev optimization tuaj yeem ua tiav lub peev xwm ntawm qhov tsawg kawg yog 12 watts ib module.
Kev sib kis xov xwm suav nrogpassive tooj liab cables (DAC), ntau hom fiber ntau (MMF) thiab ib hom fiber ntau (SMF).
Bandwidth
Lub bandwidth ntawm QSFP-DD yog txog li kaum npaug ntawm QSFP+ lossis plaub npaug ntawm QSFP28.
QSFP muaj plaub kab hluav taws xob, txhua tus muaj tus nqi ntawm 10Gb/s (QSFP+) lossis25Gb/s (QSFP28), thiab aggregation muab 40Gb/s lossis 100Gb/s daws teeb meem.
Cov khoom siv hluav taws xob ntawm QSFP-DD pluggable pob txais 8 raws, thiab txhua lub channel muaj tus nqi txog li 25Gb / s (NRZ kev hloov kho) lossis 50Gb / s (PAM4 kev hloov pauv). Kev sib sau ua ke muab kev daws teeb meem txog 200Gb / s lossis 400Gb / s.
Kev sib haum xeeb
QSFP-DD rov qab siv tau nrogQSFP+/QSFP28.
Cov kab ke tsim nrog QSFP-DD modules rov qab sib xws thiab txhawb nqa QSFP+/QSFP28 modules uas twb muaj lawm, muab kev yooj yim rau cov neeg siv kawg thiab cov tsim qauv tsim.
Chaw nres nkoj ceev
Qhov chaw nres nkoj ceev ntawm QSFP-DD thiab QSFP+/QSFP28 systems yog tib yam.
Tab sis vim hais tias txhua qhov QSFP-DD chaw nres nkoj tuaj yeem haum 8 raws es tsis yog 4 raws, QSFP-DD ua ob npaug ntawm ASIC cov chaw nres nkoj rau cov kev sib tshuam uas twb muaj lawm (xws li CAUI-4) nws txhawb nqa.
Cov neeg kho tshuab interface ntawm QSFP-DD ntawm lub motherboard yog me ntsis tob dua QSFP+/QSFP28 kom haum rau ib kab ntxiv ntawm kev sib cuag.
Piv nrog QSFP+/QSFP28, QSFP-DD tsuas yog nce qhov ntev ntawm tus nqi me me, thiab nce qhov bandwidth mus rau 10 npaug / 4 npaug ntawm qhov tom kawg thaum ua kom cov chaw nres nkoj tib yam. Nws kuj tseem rov qab sib xws, uas txhais tau tias cov neeg siv khoom hla QSFP ncaj qha. Nws tsis muaj teeb meem yog tias QSFP-DD system raug xa mus, uas txo cov nqi khoom siv ntau.
Kev sib piv ntawm QSFP-DD thiab OSFP
OSFP (Octal Small From Factor Pluggable) yog pob tshiab pluggable nrog 8 qhov hluav taws xob ceev ceev thiab yuav pib txhawb 400Gb / s (8x50G).
Loj
Qhov ntim ntawm OSFP (Octal Small From Factor Pluggable) yog ntau tshaj ob zaug ntawm QSFP-DD.
Kev sib haum xeeb
OSFP thiab QSFP-DD yog rov qab sib xws nrogQSFP+/QSFP28, tab sis yuav tsum muaj OSFP ntxiv rau QSFP adapter kom ua tiav qhov no.
Bandwidth
QSFP-DD tuaj yeem txhawb nqa txog 400Gb / s tam sim no, tab sis OSFP tuaj yeem txhawb nqa txog 800Gb / s.
QSFP-DD feem ntau yog siv rau 400G network uas tab tom yuav siv rau ntawm qhov loj (thiab siv ntau tshaj 200G los ntawm 100G txog 400G), thaum OSFP feem ntau yuav npaj rau yav tom ntej 800G network. Yog li ntawd, ua ke nrog cov xwm txheej tam sim no, QSFP-DD yog qhov tsim nyog dua li 400G optical module pob.
