Optical Transceiver Form Factors: SFP rau QSFP-DD
Apr 24, 2026| Daim pib kev txhawb nqa feem ntau peb tuav tsis yog hais txog lub zog kho qhov muag lossis qhov yuam kev me ntsis. Nws yog hais txog lub cev haum. Ib tus kws tshaj lij xaj QSFP-DD modules rau 100G-rau-400G upgrade, ntxig rau hauv cov laus QSFP28 tawb ntawm Cisco Nexus 9300-series hloov, thiab txhua qhov chaw nres nkoj nyob qis qis. QSFP-DD connector txuas mus tob dua QSFP28 los ntawm qhov dav ntawm nws thib ob hluav taws xob tiv tauj kab. Kev hloov kho lub tawb tsim ua ntej QSFP-DD MSA mus txog Rev 4.0 tsis tuaj yeem koom nrog cov kab hauv ntej kom ntseeg tau. Cov modules ua haujlwm. Cov txheej txheem optical transceiver yog mismatched tiv thaiv kev tsim lub tawb. Qhov kev sib txawv ntawd tsis tshwm sim ntawm cov khoom lag luam, thiab peb tau pom tias nws ncua sijhawm rau cov neeg siv khoom xa tawm los ntawm peb mus rau plaub lub lis piam thaum hloov khoom kho vajtse.
Kev xaiv cov qauv tsim nyog yuav tsum tau soj ntsuam ntau dua li qhov kev yuav khoom feem ntau muab rau nws. Lub plhaub lub cev teeb tsa lub qab nthab thermal, qhov chaw nres nkoj ceev, thiab rov qab - thaj tsam kev sib raug zoo rau tag nrho lub neej hloov pauv. Tau qhov ceev tsis raug thiab koj nyob rau hauv - muab ib qhov txuas. Tau txais daim ntawv foos tsis raug thiab koj ntsib lub chassis hloov ob xyoos ua ntej lub sijhawm.
Yuav ua li cas SFP Pluggable Form Factor ncav cuag 100G yam tsis hloov pauv
8.5 × 13.4 × 56.5 hli. Qhov ntawd yog SFP module hneev taw, tsis hloov pauv txij li xyoo 2001. SFP + thawb tib lub tsev rau 10G hauv 2006. SFP28 mus txog 25G hauv 2014. SFP-DD tam sim no tsav 100G los ntawm lub plhaub ntawm tib qhov dav. Nees nkaum-plaub xyoos ntawm txoj kab- kev hloov kho tshiab hauv ib lub hnab ntawv tshuab yog SFP tsev neeg qhov kev ua tau zoo tshaj plaws ntawm engineering thiab nws cov khoom txaus ntshai tshaj plaws.
Lub ntxiab zaum ntawm SFP28-rau-SFP56 ciam teb. SFP56 siv PAM4 kev hloov kho kom ncav cuag 50 Gbps, tab sis PAM4 kev txiav txim siab yuav tsum muaj tus tswv- sab SerDes silicon uas SFP28 cov chaw nres nkoj tsis muab. Lub rooj zaum ntawm lub cev; qhov txuas tsis qhia. Xyoo tas los ib tus neeg siv khoom xaj 150 SFP56 modules rau Mellanox SN2700 xa tawm, cia siab tias yuav poob rau hauv kev sib raug zoo nrog SFP28 infrastructure. Qhov hloov pauv tau txheeb xyuas cov modules raws li SFP28, txuas kev cob qhia ncua sij hawm, thiab tsis muaj lus yuam kev qhia txog kev hloov pauv tsis sib haum. Pluggable vaj tse ntsia txoj cai. Lub teeb liab tsis sib xws. Yog xav paub ntxiv txog yuav ua li cas SFP variants txawv ntawm cov qib ceev,peb SFP transceiver technical breakdownnpog cov hluav taws xob thiab kho qhov muag sib txawv uas cov ntawv spec compressed rau hauv ib kab.
Ib qho kev sib txhuam sib cais siv thoob plaws txhua qhov sib txawv ntawm SFP: tus neeg muag khoom coding. MSA ua kom cov khoom siv hluav taws xob thiab hluav taws xob sib cuam tshuam, tab sis cov tuam txhab hloov pauv sau cov cim tus kheej rau hauv EEPROM chaw nyob uas MSA tawm tsis tau teev tseg (QSFP-DD MSA). Thaum tus tswv tsev nyeem cov lej tsis lees paub, Cisco platforms yuav txwv tsis pub DDM telemetry. Qee qhov kev hloov kho Arista firmware tsis lees txais qhov module ncaj qha. Juniper cov cuab yeej zoo li ua siab ntev dua tab sis tseem chij tsis yog -coded optics hauv kev saib xyuas dashboards. Peb code txhua qhov module rau cov neeg siv khoom lub hom phiaj hloov platform ua ntej xa khoom. Txheem coding rau Cisco, Arista, thiab Juniper nkoj los ntawm Tshuag. Kev cai coding rau tsawg dua platforms ntxiv 7 mus rau 10 hnub ua hauj lwm. Cov kauj ruam ntawd tshem tawm qhov kev pheej hmoo loj tshaj plaws ntawm kev sib raug zoo rau qhov thib peb - tog SFP transceiver modules.
QSFP-DD Backward Compatibility nrog QSFP28: Lub cev haum tsis ua haujlwm haum
QSFP + xa 40G mus txog plaub txoj kab 10G. QSFP28 siv qhov sib npaug sab nraud rau 100G ntawm 25G ib txoj kab. Ob leeg sib koom tib lub tawb thiab qhov sib txuas, thiab sib xyaw ua ke hauv ib lub chassis yog niaj hnub. QSFP-DD tau muab ob npaug rau qhov hluav taws xob cuam tshuam rau yim txoj kab los ntawm kev ntxiv kab thib ob ntawm kev sib cuag, ncav cuag 400G ntawm 50G PAM4 ib txoj kab lossis 800G ntawm 100G PAM4 hauv QSFP-DD800 variant.
Rov qab compatibility khiav hauv ib qho kev taw qhia nkaus xwb. AQSFP28 moduleua haujlwm hauv QSFP-DD tawb los ntawm kev sib txuas rau pem hauv ntej kab ntawm 100G. QSFP-DD module tsis tuaj yeem zaum hauv QSFP28 tawb vim tias kab thib ob tsis muaj mating nto. Qhov no txhais tau tias koj tuaj yeem yuav QSFP-DD keyboards hnub no, populate lawv nrog QSFP28 modules uas twb muaj lawm, thiab hloov kho ib tus neeg txuas mus rau 400G raws li qhov kev thov loj tuaj. Koj tsis tuaj yeem ua QSFP28 keyboards uas twb muaj lawm lees txais QSFP-DD modules. Ntawm tag nrho covoptical transceiver daim ntawv foosHauv kev xa tawm nquag, qhov kev txwv kev taw qhia no ua rau muaj kev tsis sib haum xeeb ntawm kev yuav khoom ntau dua li cov spec -cov ntaub ntawv parameter.
QSFP112 ntxiv ib txheej ntxiv. Plaub - txoj kab tsheb no mus txog 400G ntawm 100G PAM4 ib txoj kab thiab lub cev haum rau QSFP-DD tawb. Seb nws muab 400G throughput nyob ntawm seb qhov hloov ASIC txhawb haiv neeg 4 × 100G PAM4 signaling, muaj peev xwm tam sim no hauv Broadcom Tomahawk 5 thiab tom qab silicon tab sis tsis tuaj nyob rau tiam dhau los. Ntawm cov laus ASICs lub module poob rau 100G yam tsis muaj qhov yuam kev lossis ceeb toom. Peb tau txheeb xyuas qhov no hla ntau lub platform hauv peb lub chaw kuaj mob Shenzhen thiab suav nrog ASIC cov ntawv sau tau zoo nrog txhua QSFP112 cov khoom xa tuaj.
Rau feem ntau cov chaw lag luam thiab huab cov ntaub ntawv hloov kho dua tshiab los ntawm 100G, QSFP-DD yog txoj cai transceiver module hom. Nws tiv thaiv QSFP28 cabling thiab tawb kev nqis peev uas twb muaj lawm thaum muab kev sim rau 400G. Peb400G QSFP-DD khoom kabnpog DR4, FR4, LR4, thiab SR8 variants nrog coding rau tag nrho cov loj hloov platforms, thiab txheem configurations nkoj los ntawm Tshuag.
OSFP vs QSFP-DD rau 400G thiab 800G: Kev Txiav Txim Ecosystem
Cov thermal specs tau txais kev pom zoo tshaj plaws hauv OSFP vs QSFP-DD kev sib piv, tab sis lawv tsis yog qhov ua rau kev txiav txim siab yuav khoom feem ntau. OSFP modules dav dua (22.6 mm vs 18.35 mm), txhawb kev sib koom ua ke heatsinks dissipating saum 30 watts, thiab tuav 800G module fais fab mus txog 20W yam tsis muaj qhov system-theem thermal constraints. Cov lej no tseem ceeb rau kev ua kom siab - ntom ntom. Lawv tsis piav qhia vim li cas lub khw faib qhov twg nws ua.
NVIDIA covInfiniBand NDR platformsiv OSFP nkaus xwb rau 400G thiab 800G txuas. QSFP-DD tsis yog siv nyob rau hauv tam sim no - tiam InfiniBand systems (NVIDIA Networking Documentation). Rau cov koom haum tsim GPU kev cob qhia pawg ntawm NVIDIA InfiniBand, siab -cov lus nug ntim kho qhov muag ceev muaj ib qho lus teb. Tsis muaj thermal tsom xam hloov qhov ntawd.
Ethernet{0}}raws li cov ntaub ntawv chaw ntaub ntawv qhia ib zaj dab neeg sib txawv. QSFP-DD dominates vim hais tias rov qab sib raug zoo nrog QSFP28 kev tsim kho vaj tse txhais ua cov nqi tsiv teb tsaws qis thiab kev tswj cov khoom lag luam yooj yim dua. Lub hybrid architecture tam sim no tshwm sim hauv kev sib xyaw- chaw ua haujlwm, OSFP ntawm qaum-tier GPU kev sib txuas thiab QSFP-DD ntawm nplooj-tier server uplinks, qhia txog qhov ecosystem no- theem sib cais. Peb muab thiab sim ob qho tib si cov qauv, thiab muab cov qauv coded hauv ob lub ntim rau kev kuaj xyuas ua ntej kev cog lus ntim. Peb800G transceiver portfoliosuav nrog OSFP thiab QSFP-DD800 kev xaiv nrog tib coding thiab cov qauv ntsuas.
Yuav ua li cas kom muaj tseeb ua ntej muab 400G QSFP-DD Bulk Order
Thaum lub sij hawm xa mus rau qhov tseeb xyoo tas los, tus neeg siv khoom Arista 7050CX3 tsis pom DDM lub tswb ntawm ib qho ntawm nws 400G chaw nres nkoj, tab sis cov modules tau khiav ntawm 74℃rau rau teev, ntsiag to throttling xa hluav taws xob thiab nce FEC nyiaj siv ua haujlwm. Qhov teeb meem tshwm sim tsuas yog thaum pob ntawv poob tshwm sim ntawm kev saib xyuas dashboards.DDM telemetrytau tsis ua haujlwm vim hais tias lub module coding tsis tag nrho dhau qhov hloov qhov kev kuaj xyuas qhov tseeb.
Qhov uas ntsiag to degradation yog vim li cas thermal thiab fais fab -chav kawm validation nyob rau hauv pre{1}}procurement theem. A 400G QSFP-DD transceiver rub tawm 12 mus rau 14 watts nyob rau hauv cov tsheb thauj mus los, kwv yees li peb npaug ntawm 100G QSFP28. Ntawm tag nrho 36-chaw nres nkoj ceev, transceiver cua sov ib leeg nce mus txog 500 watts rau ib qho kev hloov. Nyob ib sab siab - fais fab modules tsim thermal coupling nyob rau hauv nruab nrab - kab-daim ntawv txoj hauj lwm uas airflow velocity tee, thiab CMIS thermal tiv thaiv mechanism teb los ntawm kev txo hwj chim kho qhov muag thiab tsa FEC yam tsis tau tsim kev ceeb toom pom tshwj tsis yog tias DDM yog tag nrho active.
Peb qhov kev lees paub los tiv thaiv cov chav kawm ntau tshaj plaws ntawm kev ua haujlwm siab -ntaus transceiver deployment tsis ua haujlwm.
- Paub meej tias koj tus neeg muag khoom hloov pauv lub zog txhawb nqa chav kawm ib qho chaw nres nkoj: Chav 4 chaw nres nkoj (tsawg dua lossis sib npaug li 8.5W) yuav kaw lossis tsis kam Chav Kawm 7/8 QSFP-DD modules.
- Khiav ib 72-teev hlawv- nyob rau hauv tag nrho cov chaw nres nkoj pej xeem thiab saib xyuas cov ntaub ntawv kub los ntawm qhia interface transceiver cov ntsiab lus ntawm NX-OS, qhia interfaces transceiver ntawm EOS, los yog qhia chassis pic-status ntawm Junos.
- Xyuas kom tseeb tias DDM yog nquag thiab tshaj tawm ntawm txhua qhov chaw nres nkoj.
Peb suav nrog cov ntawv sau thermal compatibility thiab lub zog- cov qhab nia hauv chav kawm nrog txhua QSFP-DD cov khoom xa tuaj, thiab peb pab neeg ua haujlwm tshuaj xyuas hloov pauv- cov ntaub ntawv pov thawj qib ua ntej lees paub qhov kev txiav txim ntau. Rau kev saib dav dav ntawm yuav ua li cas pluggable modules piv rau cov kev hloov tshiab ntawm thermal thiab serviceability pem hauv ntej,peb tsom xam ntawm pluggable vs co-packaged opticsnpog lub sijhawm ntev - kev lag luam tawm - tawm.
Xaiv txoj cai Pluggable Module Format rau 100G-rau-400G Migration
Peb cov lus pom zoo rau cov neeg siv khoom uas twb muaj lawm QSFP28 infrastructure: pib nrog QSFP-DD. Siv cov keyboards tshiab nrog QSFP-DD tawb, populate lawv pib nrog QSFP28 modules uas twb muaj lawm ntawm 100G, thiab hloov kho ib tus neeg txuas mus rau400G DR4 los yog FR4raws li kev xav tau. Txoj kev no muaj kev siv nyiaj tsawg tshaj plaws, tiv thaiv cov khoom lag luam uas tau teeb tsa, thiab ua haujlwm tau zoo ntawm txhua qhov kev hloov pauv loj uas peb tau sim.
OSFP ua rau muaj kev nkag siab hauv ob qhov xwm txheej tshwj xeeb: AI / HPC pawg tshiab tsim nrog tsis muaj QSFP28 legacy qhov twg InfiniBand yog lub hom phiaj ntaub, los yog txha nraub qaum-tier deployments qhov kev txhawb zog module tsis tu ncua ntau tshaj 15 watts. Nyob rau sab nraud cov xwm txheej, qhov rov qab los ntawm - kev sib raug zoo tsis raug cai los ntawm chav tsev thermal ib leeg.
Ib lo lus nug uas peb hnov ntau zaus los ntawm pawg neeg yuav khoom ntsuas tom ntej - tiam qauv qauv qauv: QSFP puas yuav -DD yuav dhau los thaum CPO lossis LPO tuaj txog? Co- ntim optics ntim xa tawm tseem npaj rau 2028 thaum ntxov los ntawm cov kws tshuaj ntsuam suav nrogTeeb suav. LPO khaws cia QSFP-DD vaj tse tab sis yuav tsum tau hloov ASICs nrog analog pem hauv ntej- xaus tias feem ntau lub platform tam sim no tsis muaj; peb tau soj ntsuam cov qauv ntsuas ntawm ob lub platform thiab paub tseeb tias tus tswv tsev sib raug zoo tsis tuaj yeem xav tias. QSFP-DD infrastructure yuav niaj hnub no muaj lub neej ua haujlwm tiag tiag ntawm tsib xyoos lossis ntau dua ua ntej tom ntej- cov kev hloov pauv hloov mus txog qhov muaj ntau lawm. Rau cov tes hauj lwm tau teev tseg thiab tau txais hauv 2026, pluggable transceivers tseem yog cov qauv uas thauj khoom, teeb tsa, thiab tau txais kev pabcuam hauv cov xuab moos, tsis yog lub lis piam.
Yog tias koj qhov kev hloov kho tshiab suav nrog kev sib xyaw nrawm nrawm lossis ntau tus neeg muag khoom hloov pauv, peb pab neeg ua haujlwm daws teeb meem tau lees paub kev sib raug zoo ntawm koj cov khoom siv tshwj xeeb thiab muab cov qauv coded rau kev kuaj sim ua ntej koj cog lus rau ntim. Txheem QSFP-DD thiab OSFP qauv xa los ntawm Tshuag. Kev cai -cov qauv sib txawv yuav tsum siv 7 mus rau 10 hnub ua haujlwm. Kev txiav txim ntim ntau dua 1,000 units nqa lub sijhawm ua haujlwm ntxiv ntawm 3 mus rau 4 lub lis piam. Hu rau ntawm peb nplooj ntawv nug los yog mus saib ntawmtag nrho transceiver catalograu tam sim no muaj nyob rau hauv tag nrho cov ceev tiers.