QSFP-DD yog qhov siab- qhov ceev pluggable daim foos tau dav siv rau 400G thiab 800G-chav kawm network interfaces. Tus qauv tsim nws tus kheej, txawm li cas los xij, tsis qhia koj txog qhov ncav cuag, hom fiber ntau, connector, breakout muaj peev xwm, los yog txawm tias ib qho module yuav khiav hauv ib qho kev hloov.
Ib txoj kev xaiv txhim khu kev qha pib nrog tus tswv tsev platform thiab qhov kev sib txuas yuav tsum tau ua, tom qab ntawd ua haujlwm sab nraud mus rau qhov chaw kho qhov muag. Qhov ntawd txhais tau tias xyuas cov ntaub ntawv tus nqi, nyob deb, ntsia fiber ntau, connector hom, breakout hom, FEC, hwj chim, thermal txwv, firmware, thiab module tsim nyog ua ntej xaj.
Phau ntawv qhia no tsom rau cov kev txiav txim siab engineering. Txhawm rau saib tob dua ntawm daim ntawv foos nws tus kheej, saib covQSFP-DD technical overview.
QSFP -DD Transceiver yog dab tsi?
QSFP-DD stands for Quad Small Form Factor Pluggable Double Density. Piv nrog rau plaub tiam dhau los ntawm QSFP, QSFP-DD ntxiv ib kab thib ob ntawm kev sib cuag hluav taws xob thiab txhawb yim siab -ceev tus tswv tsev hluav taws xob cuam tshuam. CovQSFP-DD MSA specificationtxhais cov qauv, connector, hluav taws xob interface, thermal yam ntxwv, pinout, thiab tswj lub moj khaum.
Cov hluav taws xob sib txuas ntxiv tso cai rau tib tsev neeg compact module los ntsuas kom ntau dua qhov sib sau ua ke bandwidth. Tam sim no QSFP-DD hardware specifications kuj txuas ntxiv lub tshuab platform rau QSFP-DD800 thiab QSFP-DD1600 tiam, tab sis kev txhawb nqa rau tiam no tseem nyob ntawm tus tswv tsev ASIC, SerDes, firmware, xa hluav taws xob, thiab tsim thermal.
Cov kab hluav taws xob tsis zoo ib yam li Optical Lanes
Qhov kev sib txawv no tiv thaiv ntau QSFP-DD xaiv yuam kev. Tus tswv tsev txuas tuaj yeem siv yim txoj kab hluav taws xob thaum sab kho qhov muag siv txoj kab sib txawv los yog kev teeb tsa wavelength.
Ib qho 400G DR4 module yog ib qho piv txwv muaj txiaj ntsig. Ntawm tus tswv tsev, QSFP-Kev siv DD tuaj yeem siv yim- kab hluav taws xob sib txuas. Nyob rau sab kho qhov muag, DR4 nqa lub teeb liab 400G hla plaub qhov sib npaug ib zaug - hom kho qhov muag kab. FR4 thiab LR4 siv lwm txoj hauv kev: plaub qhov kev kho qhov muag wavelengths yog multiplexed mus rau ib tug duplex fiber ntau.
- SR8:yim parallel multimode optical kab.
- DR 4:plaub kab sib luag ib zaug -mode optical kab.
- FR4/LR4:plaub wavelengths nqa hla duplex ib zaug -mode fiber.
Tus naj npawb hauv lub npe kho qhov muag yog li piav qhia txog qhov kho qhov muag, tsis yog tus naj npawb ntawm tus tswv tsev -sab QSFP-DD hluav taws xob tiv tauj.
QSFP-DD Generations: 400G, 800G, thiab 1.6T
400G QSFP-DD
400G yog ib qho ntawm kev siv ntau tshaj plaws ntawm QSFP-DD form factor. Ib qho 400G QSFP-DD chaw nres nkoj tuaj yeem txuas los ntawm multimode parallel optics, ib qho tib yam -mode optics, duplex wavelength-multiplexed optics, tooj liab cables, active hluav taws xob cables, active optical cables, los yog coherent modules, nyob ntawm seb lub platform thiab nyob deb.
Qhov ntau yam no muaj txiaj ntsig, tab sis nws kuj txhais tau hais tias ob lub modules sau tias "400G QSFP-DD" tuaj yeem xav tau cov kab sib txawv thiab cov kab sib txuas.
800G QSFP-DD thiab QSFP-DD800
QSFP-DD800 khaws yim siab -ceev tus tswv tsev hluav taws xob sib cuam tshuam thaum nce ib - kab hluav taws xob tus nqi. Hauv kev xa tawm, 800G-chaw nres nkoj hauv chav kawm yuav raug siv los ua ib qho siab - muaj peev xwm interface lossis tuaj yeem nthuav tawm qhov peev xwm li ntau qhov qis dua -kev sib txuas ceev, nyob ntawm lub module thiab host platform.
Cisco tam sim noQSFP-DD800 module data sheetPiv txwv li, cov ntaub ntawv ob qho kev siv tau zoo:
| QSFP-DD800 Architecture | Media | Txuas | Documented Reach | Hom kev siv |
|---|---|---|---|---|
| 8 × 100GBASE-FR1 | Parallel ib leeg - hom fiber ntau | Dual MPO-12 APC | Mus txog 2 km | High -ntaus kev sib cais mus rau ntau qhov txuas 100G |
| 2 × 400GBASE-FR4 | Duplex ib leeg - hom fiber ntau | Ob lub duplex LC connectors | Mus txog 2 km | Ob qhov kev ywj pheej 400G txuas los ntawm ib qho 800G-chaw nres nkoj |
Qhov no qhia txog qhov tseem ceeb: "800G QSFP-DD" tsis muaj ntaub ntawv txaus rau kev yuav khoom. Koj tseem yuav tsum paub seb daim ntawv thov yuav tsum yog haiv neeg 800G, 2 × 400G, 8 × 100G, lossis lwm hom kev txhawb nqa, thiab seb lub party platform nthuav tawm hom ntawd.
Puas yog QSFP-DD Support 1.6T?
QSFP-DD MSA tau txuas ntxiv kho vajtse specification rau QSFP-DD1600. Qhov ntawd tsis ua rau QSFP uas twb muaj lawm -DD lossis QSFP-DD800 chaw nres nkoj tuaj yeem khiav tau 1.6T module. Tam sim noQSFP-DD Hardware Specification Rev. 7.1suav nrog QSFP-DD1600 kev siv tshuab thiab thermal, tab sis kev xa tawm tiag tiag tseem yog lub platform- tshwj xeeb.
Puas yog QSFP-DD Backward Compatible?
Backward compatibility yog ib qho ntawm cov kev nyiam tshaj plaws ntawm QSFP-DD ecosystem. Tus tswv tsev tsim los rau QSFP-DD tuaj yeem ua tau raws li QSFP yav dhau los-tsev neeg cov qauv xws li QSFP+, QSFP28, thiab QSFP56, thiab cov neeg muag khoom xws li Cisco sau cov peev txheej no ntawm kev txhawb nqa platforms.
Mechanical haum tsuas yog thawj tus mob. Qhov hloov lossis router yuav tsum tau txhawb nqa lub module ceev, SerDes hom, FEC, chaw nres nkoj configuration, firmware, thiab software tso tawm. QSFP28 module yuav haum rau QSFP-DD chaw nres nkoj thiab tseem tsis ua haujlwm yog tias tus tswv tsev tsis txhawb hom xav tau.
Kev taw qhia rov qab yog qhov sib txawv: QSFP-DD module yuav tsum tsis txhob xav tias yuav ua haujlwm hauv QSFP28 lub tawb qub qub vim tias tus tswv tsev laus tsis muab cov xov tooj hluav taws xob ntxiv thiab cov qauv tsim los ntawm QSFP-DD.
QSFP-DD vs. QSFP28, QSFP56, thiab OSFP
| Form Factor | Hom Network Generation | Lub Tuam Txhab Hluav Taws Xob | Kev xaiv thawj zaug |
|---|---|---|---|
| QSFP28 | 100G | 4 | Mature 100G infrastructure thiab dav ntsia puag |
| QSFP56 | 200G-cov ntawv thov hauv chav kawm | 4 | Cov kab ntau dua thaum khaws plaub - kab ke host architecture |
| QSFP-DD | 400G, 800G-chav kawm, thiab cov tiam tshiab | 8 | High pem hauv ntej- vaj huam sib luag ceev thiab QSFP- tsev neeg txoj kev tsiv teb tsaws chaw |
| OSFP | 400G, 800G, thiab tom ntej - tiam platforms | 8 | Lub hnab ntawv loj dua thiab ntau dua thermal tsim headroom |
Hauv feem ntau cov tes hauj lwm tiag tiag, qhov hloov pauv txiav txim siab txog daim ntawv. Koj feem ntau tsis xaiv OSFP lossis QSFP-DD optic ua ntej thiab tom qab ntawd cia siab tias nws yuav haum rau qhov chaw nres nkoj siab - ceev. Pib nrog lub tawb ib txwm thiab lub platform txhawb nqa cov npe transceiver.
Common 400G QSFP-DD Optical Interfaces
Rau 400G xaiv, kev ncua deb tsuas yog ib qhov ntev. Cov ntsia hlau fiber ntau thiab connector feem ntau nqaim qhov kev xaiv sai li sai tau.
| Interface | Fiber ntau | Hom Connector | Tus Neeg Sawv Cev Reach | Qhov Zoo Tshaj Plaws Pib Thaum |
|---|---|---|---|---|
| 400g SR 8 | OM4 multimode | MPO-16 | Mus txog 100 m | Koj muaj luv luv multimode txuas thiab parallel cabling |
| 400G DR 4 | Parallel ib leeg - hom | MPO-12 | Mus txog 500 m | Koj xav tau luv luv - ncav cuag SMF lossis zoo li 4 × 100G breakout |
| 400g FR4 | Duplex ib leeg - hom | Duplex LC | Mus txog 2 km | Koj muaj duplex SMF thiab xav tau fiber ntau suav |
| 400 g LR4 | Duplex ib leeg - hom | Duplex LC | Txog li 10 km hauv kev siv cov neeg muag khoom | Koj xav tau lub tsev kawm ntawv ntev dua lossis qhov chaw txuas |
Cisco cov400G QSFP-DD transceiver data sheetCov ntaub ntawv tus neeg sawv cev siv rau ntawm qhov ncav cuag, suav nrog DR4 ntawm 500 m, FR4 ntawm 2 km, thiab nws qhov kev siv LR4 txog li 10 km.
400g SR 8
SR8 siv cov khoom sib txuas multimode optics thiab yog qhov tseem ceeb tshaj plaws rau kev sib txuas luv luv uas cov txheej txheem multimode twb nyob rau hauv qhov chaw. Cov suav fiber ntau yog siab dua duplex ib zaug - hom kev xaiv, yog li kev sib txuas thiab lub cev tsim teeb meem. Yog tias koj tab tom ua haujlwm nrog OM3, OM4, lossis OM5 infrastructure, lubmultimode fiber ntau nrug qhiamuab cov ntsiab lus tseem ceeb rau cov nroj tsuag txwv.
400G DR 4
DR4 nqa plaub txoj kab sib txuas kho qhov muag hla ib qho - hom fiber ntau thiab feem ntau siv MPO. Nws yog ib qho muaj zog haum rau cov ntaub ntawv-center interconnects mus txog 500 m thiab rau cov qauv tsim uas yuav xav tau 4 × 100G breakout, muab tus tswv tsev thiab deb -kawg optics txhawb tib lub architecture.
Tsis txhob nres ntawm lo lus "MPO." Txheeb xyuas MPO-12 piv rau MPO-16, APC piv rau UPC, polarity, fiber ntau suav, thiab txoj kev patching. Rau cov lus siv cabling thiab mating cov ntsiab lus, saib hauvMTP vs MPO engineering qhia.
400g FR4
FR4 multiplexes plaub wavelengths mus rau ib tug duplex ib zaug -hom fiber khub. Nws feem ntau yog qhov kev xaiv huv dua thaum lub xaib twb muaj duplex LC ib zaug - hom cabling thiab qhov txuas yog nyob rau hauv 2 km. Piv nrog rau qhov sib npaug ntawm optic, FR4 kuj txo cov fibers uas xav tau rau 400G kev sib txuas.
400 g LR4
LR4 ua raws tib lub duplex -fiber txoj cai tab sis txuas mus txog. Kev siv tus neeg muag khoom tuaj yeem sib txawv, yog li kho qhov kev ncua deb raws li cov ntaub ntawv - daim ntawv kos ntau dua li qhov xav tias txhua yam khoom uas muaj lub npe zoo li LR4 muaj qhov sib npaug.
Thaum Coherent Optics Nkag mus rau Tsim
Rau metro thiab DCI nyob deb tshaj li cov neeg siv khoom zoo tib yam - optic ncav cuag, qhov teeb meem hloov. Coherent modules qhia kab - system compatibility, wavelength npaj, amplification, tswj, hwj chim, thiab thermal xav. A 400ZR-chav tsim qauv yuav tsum yog li ntawd tau tsim los ua ib feem ntawm kev thauj khoom kho qhov muag, tsis yog kho raws li "ntau dua LR4."
Yuav Ua Li Cas Xaiv 800G QSFP-DD Optics
Kev xaiv 800G tsim nyog rau nws txoj kev txiav txim siab vim tias tus tswv tsev ntau dua tus nqi, lub zog module, thiab tus cwj pwm tawg ua rau lub platform tsim nyog tseem ceeb dua.
1. Paub meej tias "800G" txhais li cas ntawm Chaw nres nkoj
Txiav txim siab seb daim ntawv thov xav tau ib qho 800G Ethernet txuas, 2 × 400G, 4 × 200G, 8 × 100G, lossis lwm tus tswv tsev- txhawb hom. Cov lus piav qhia ntawm module yuav tsum ua raws li daim ntawv thov xav tau.
2. Sib phim qhov kho qhov muag Architecture rau Fiber Plant
Ib qho 800G- chav kawm module tuaj yeem nthuav tawm qhov sib txawv ntawm qhov sib txawv. Hauv Cisco QSFP-DD800 piv txwv saum toj no, 8 × 100G FR siv tib lub SMF thiab dual MPO-12 APC, thaum 2 × 400G FR4 siv ob lub duplex ib zaug- hom fiber ntau nrog LC connectors. Cov no yog cov qauv sib txawv ntawm lub cev txawm tias ob qho tib si siv 800G-chav kawm host chaw nres nkoj.
Yog tias lub vev xaib twb muaj duplex LC infrastructure, lub wavelength -multiplexed 2 × 400G architecture yuav zam tsis hloov cov nroj tsuag. Yog tias lub hom phiaj siab - kiv cua ceev- tawm mus rau ntau qhov kawg ntawm 100G, qhov kev sib txuas sib txuas yuav siv tau ntau dua.
3. Npaj Breakout Ua ntej Ordering Cable
Breakout yuav tsum tau kho raws li qhov kawg kawg - mus rau - xaus architecture. Tshawb xyuas hom chaw nres nkoj host, daim ntawv thov transceiver, deb-kawg optics, kab ntawv qhia, FEC, connector polarity, thiab fiber ntau suav ua ke. CovMPO breakout cable qhiayog qhov muaj txiaj ntsig zoo thaum lub tshuab kho qhov muag xav tau qhov sib npaug ntawm - mus rau -ntau - chaw nres nkoj cable tsim.
4. Txheeb xyuas lub zog thiab qhov ntsuas kub ntawm qhov chaw nres nkoj tag nrho
Siab dua - cov modules ceev tuaj yeem siv lub zog ntau dua li qub optics. Cisco cov ntaub ntawv QSFP-DD800 piv txwv tau ntsuas ntawm 17 W lub zog siv hluav taws xob siab tshaj plaws, uas yog ib qho tseem ceeb ceeb toom tias tag nrho - pej xeem tus cwj pwm tseem ceeb tshaj li ib qho - chaw nres nkoj lub rooj zaum xeem.
Ntsuas lub zog transceiver ua ke nrog chassis airflow, inlet kub, kiv cua txoj cai, ASIC load, thiab khib zog. Qee lub platform txwv siab -lub zog optics rau cov chaw nres nkoj tshwj xeeb lossis kev ua haujlwm.
5. Txheeb xyuas CMIS, Firmware, thiab Platform Qualification
Niaj hnub nimno QSFP-DD modules siv Common Management Interface Specification rau kev txheeb xyuas, pib, saib xyuas, kev tshaj tawm daim ntawv thov, thiab kev teeb tsa datapath. OIF tso tawmCMIS 5.4hauv 2026.
Qhov kev hloov kho CMIS tshiab tshaj plaws tsis yog qhov uas koj xav tau. Tus tswv tsev software, module firmware, tshaj tawm daim ntawv thov, thiab datapath yuav tsum ua haujlwm ua ke. Ib qho module tuaj yeem kuaj pom tau raug thiab tseem tsis tuaj yeem tsim qhov txuas ua haujlwm yog tias daim ntawv thov lossis firmware ua ke tsis muaj kev txhawb nqa.
Yuav Ua Li Cas Xaiv QSFP-DD Transceiver hauv 5 Kauj Ruam
Kauj ruam 1: Pib Nrog Lub Chaw Nres Nkoj thiab xav tau cov ntaub ntawv tus nqi
Sau qhov hloov pauv lossis tus qauv router, kab ntawv, hom chaw nres nkoj, thiab cov ntaub ntawv xav tau tus nqi. Paub meej tias qhov chaw nres nkoj puas txhawb 400G, 800G-chav ua haujlwm, lossis hom kev sib cais uas yuav tsum tau ua. Tsis txhob cuam tshuam hluav taws xob muaj peev xwm los ntawm cov duab ntawm lub tawb.
Kauj ruam 2: Ntsuas qhov tseeb Optical Path
Siv txoj kev teeb tsa, tsis yog ncaj nraim - kab kwv yees. suav nrog ntsug thiab kab rov tav routing, thaj vaj huam sib luag, ntoo khaub lig- txuas, kev pabcuam loops, thiab ib qho kev tswj xyuas fiber ntau nruab nrab. Tom qab ntawd xaiv ib qho interface uas nws qhov kev txhawb nqa ncav cuag npog tag nrho txoj hauv kev nrog cov qauv tsim nyog.
Insertion poob kuj tseem ceeb heev raws li cov channel ntxiv cov connectors thiab thaj cov ntsiab lus. Yog xav paub ntxiv txog qhov no ntawm cov nyiaj siv kho qhov muag, saib covqhia rau kev nkag poob hauv fiber ntau network.
Kauj Ruam 3: Txheeb xyuas qhov teeb tsa Fiber
Txiav txim siab seb cov nroj tsuag yog OM3/OM4/OM5 multimode, parallel single-mode, los yog duplex single-mode. Qhov no tam sim tshem tawm cov kev xaiv tsis sib xws.
Piv txwv li, ib qho uas twb muaj lawm duplex LC ib zaug -hom cog ib txwm taw qhia rau FR4- lossis LR4-style architectures thaum qhov kev ncua deb thiab tus tswv tsev txhawb nqa haum. Yog tias qhov chaw siv ib hom fiber ntau tab sis hom pes tsawg lossis daim ntawv thov tsis meej, qhovib leeg- hom fiber ntau hom thiab daim ntawv thov kev qhiatuaj yeem pab sau cov nroj tsuag ua ntej xaiv optic.
Kauj Ruam 4: Sib piv cov Connector thiab Breakout Architecture
Tsis txhob yuav ib qho module raws li "400G QSFP-DD" lossis "800G QSFP-DD." Txheeb xyuas qhov sib txuas kho qhov muag ntawm ob qho kawg thiab los ntawm txhua qhov chaw patching.
- MPO-12 los yog MPO-16
- APC los yog UPC
- Duplex LC lossis ntau qhov sib txuas LC
- Fiber suav thiab polarity
- Breakout daim ntawv qhia
- Patch - vaj huam sib luag compatibility
Yog tias lub network sib xyaw cov tsev neeg sib txuas, siv cov ntaub ntawv txuas nrog cov phiaj xwm es tsis yog kev cia siab rau thaj chaw adapters raws li kev xav tom qab. Covfiber optic connector hom qhiamuab cov ntaub ntawv siv tau zoo rau LC, MPO, SC, thiab lwm cov tsev neeg txuas.
Kauj ruam 5: Txheeb xyuas qhov tseeb Module tawm tsam tus tswv lub platform
Ua ntej yuav khoom, xyuas cov module ib feem tus lej tiv thaiv lub platform txhawb transceiver matrix thiab software tso tawm. Paub meej:
- hloov lossis router qauv thiab kab ntawv;
- txhawb Ethernet tus nqi thiab chaw nres nkoj hom;
- breakout configuration;
- xav tau FEC;
- module fais fab chav kawm thiab thermal txwv;
- CMIS thiab firmware xav tau;
- tus neeg muag khoom tsim nyog thiab txhawb software version.
Qhov no yog cov kauj ruam uas tiv thaiv tus nqi kwv yees tias lub cev sib xws yuav tsum tau ua haujlwm tau zoo.
QSFP-DD Cabling: DAC, AEC, AOC, lossis cais Optics?
| Hom kev sib txuas | Qhov twg yog qhov zoo tshaj plaws | Main Advantage | Kev lag luam loj -Tawm |
|---|---|---|---|
| Passive DAC | luv heev nyob rau hauv - khib los yog nyob ib sab - khib txuas | Tsawg zog thiab yooj yim xa tawm | Tsawg ncav cuag thiab thicker tooj liab |
| AEC | Cov kab hluav taws xob luv luv uas xav tau cov teeb liab ntau dua li cov tooj liab passive | Ntau tshaj li passive DAC yam tsis muaj kev hloov kho qhov muag | Cov khoom siv hluav taws xob nquag ntxiv lub zog thiab tus nqi |
| AOC | Short optical txuas qhov twg ib qho kev sib dhos ruaj khov tau txais | Lub teeb cable thiab yooj yim routing | Tag nrho lub rooj sib txoos yuav xav tau kev hloov pauv yog tias qhov kawg ua tsis tiav |
| Sib cais transceivers thiab fiber | Structured cabling, thaj vaj huam sib luag, txuas ntev dua, cov qauv siv tau | Qhov siab tshaj plaws hloov tau thiab hloov tau | Ntau cov khoom siv los qhia thiab tswj |
AECs can be useful in dense server and accelerator environments, but treat that as an application-dependent design choice rather than a universal default. Cov lus teb yog nyob ntawm kev ncav cuag, cable- tswj kev txwv, kev tsim nyog tus tswv, thiab lub zog.
QSFP-DD Breakout: Dab tsi Yuav Tsum Tau Ua?
Breakout faib qhov siab - chaw nres nkoj ceev ceev rau hauv ntau qhov qis dua - nrawm interfaces. Cov piv txwv muaj xws li 400G rau 4 × 100G thiab, ntawm kev txhawb nqa QSFP-DD800 kev siv, 800G-chav nres nkoj mus rau 2 × 400G lossis 8 × 100G.
Lub cable tsis tuaj yeem tsim ib qho kev sib cais uas cov khoom siv hluav taws xob tsis txhawb nqa. Tus tswv tsev, module, deb -kawg interface, FEC, txoj kab kev qhia, thiab fiber ntau polarity yuav tsum pom zoo.
- Paub meej tias qhov hloov pauv txhawb hom kev thov kom tawg.
- Paub meej tias lub transceiver lossis cable tshaj tawm tib daim ntawv thov.
- Paub meej tias nyob deb -kawg optics siv cov teeb liab sib xws.
- Xyuas cov connector suav, polarity, thiab kab kev qhia.
- Tshawb xyuas FEC cov cai ntawm ob qho kawg.
Rau cov kab hluav taws xob sib txuas, sau cov kab hluav taws xob tiag tiag ua ntej xa mus es tsis yog kho MPO polarity raws li kev nthuav dav.
Fais fab, Thermal, FEC, thiab kev txiav txim siab tswj
Fais fab thiab Thermal Design
Ntawm 400G thiab tshwj xeeb tshaj yog 800G-chav kawm ceev, kev xaiv transceiver kuj yog lub chassis- theem kev txiav txim siab thermal. Muab lub zog module los ntawm qhov xav tau ntawm cov chaw nres nkoj, tom qab ntawd ntsuas qhov tshwm sim nrog rau ASIC lub zog, kiv cua muaj peev xwm, kev taw qhia airflow, inlet kub, thiab khib fais fab txwv.
Ib qho kev ua haujlwm ib txwm ua tsis tau ua pov thawj tias daim npav uas muaj neeg coob coob yuav ua tau raws li qhov ntsuas kub. Siv tus tswv tsev muag khoom qhov chaw nres nkoj- cov pej xeem thiab thermal kev taw qhia rau lub chassis tiag.
FEC
Kev kho yuam kev rau pem hauv ntej yog ib feem ntawm qhov siab - nrawm txuas architecture. Ib qho kev sib txuas nrog lub hwj chim kho qhov muag kom raug thiab raug cabling tseem tuaj yeem ua tsis tau yog tias ob qhov kawg tau teeb tsa rau qhov tsis sib xws FEC hom. Thaum daws teeb meem, txheeb xyuas qhov xav tau FEC rau qhov tseeb interface thiab lub platform es tsis xav tias lub neej ntawd yog qhov tseeb.
CMIS thiab firmware
CMIS muab cov txheej txheem tswj kev sib koom ua ke, tab sis kev sib koom tes tseem nyob ntawm kev siv. Tus tswv software yuav tsum paub txog lub module, xaiv ib daim ntawv thov kev txhawb nqa, pib lub datapath kom raug, thiab ua haujlwm nrog module firmware. Qhov no yog vim li cas module tsim nyog yuav tsum suav nrog cov software tso tawm, tsis yog tus qauv hloov pauv nkaus xwb.
Feem ntau QSFP-DD xaiv yuam kev
Xaiv los ntawm Reach Ib leeg
Qhov txuas 2 km tsis tau txhais hais tias "yuav FR4." Fiber hom, connector system, breakout yuav tsum, thiab platform tsim nyog yuav taw tes rau ib tug txawv architecture.
Confusing Host Lanes Nrog Optical Lanes
Yim QSFP-DD host hluav taws xob kab tsis tau txhais hais tias txhua tus transceiver siv yim txoj kab kev kho qhov muag. Nyeem ob qho tib si hluav taws xob thiab kho qhov muag interface ntu ntawm cov ntaub ntawv module.
Piv txwv tias Backward Compatibility yog Universal
Rov qab-kev tsim kho tshuab siv tau tsis dhau kev hloov ASIC, software, FEC, lossis chaw nres nkoj- hom txwv.
Kho "MPO" raws li kev sib txuas ua tiav Specification
MPO-12 thiab MPO-16 tsis yog cov lus piav qhia sib hloov. APC/UPC, polarity, fiber ntau suav, thiab breakout daim ntawv qhia yuav tsum tau teev raws li ib feem ntawm cov channel.
Kho Tag Nrho 400G lossis 800G Modules raws li kev hloov pauv
Modules tuaj yeem sib qhia tib qhov kev sib sau nrawm thaum siv ntau hom fiber ntau, cov khoom sib txuas suav, wavelengths, thiab kev coj tus cwj pwm tawg. Cov ntaub ntawv tus nqi tsuas yog ib daim teb hauv kev txheeb xyuas kev sib raug zoo.
Tsis quav ntsej tag nrho -Population Thermal Behavior
High -qhov ntom ntom optics yuav tsum raug lees paub ntawm cov neeg siv chassis thiab ib puag ncig, tsis yog ib qho chaw nres nkoj ib zaug xwb.
QSFP-DD Selection Piv txwv
Piv txwv 1: 400G Ntawm Ob Qhov Hloov Hloov 300 m Sib nrug
Yuav tsum muaj:400G Ethernet, 300 m kho qhov muag txoj kev, ib leeg - hom fiber ntau muaj, thiab ua tau rau yav tom ntej 4 × 100G breakout.
Pib taw tes:400G DR 4. Nws qhov sib npaug SMF architecture txhawb nqa txog 500 m hauv cov ntaub ntawv siv thiab ua kom zoo ib yam nrog qee qhov 100G breakout designs. Ua ntej kev yuav khoom, txheeb xyuas MPO polarity, qhov tseeb deb-kawg 100G interface, FEC, thiab hloov pauv kev txhawb nqa.
Piv txwv 2: 400G Ntawm Cov Tsev 1.5 km Sib nrug
Yuav tsum muaj:400G, uas twb muaj lawm duplex ib zaug - hom fiber ntau, LC thaj vaj huam sib luag, thiab tsis tas yuav tsum tau tawg.
Pib taw tes:400g FR4. Nws tuaj yeem siv cov duplex SMF uas twb muaj lawm thiab muab txog li 2 km mus txog hauv cov qauv sib xws-raws li kev siv, zam kev hloov pauv mus rau qhov sib npaug - fiber ntau cog.
Piv txwv 3: Ib 800G-Class Port Pub Ob Qhov Txuas Txuas 400G
Yuav tsum muaj:ib lub chaw nres nkoj host nrog 800G-chav kawm hluav taws xob muaj peev xwm, ob txoj kev ywj pheej 400G txuas, duplex SMF, LC txuas, thiab qhov deb ntawm 2 km.
Pib taw tes:2 × 400G FR4 QSFP-DD800 architecture, yog tias tus tswv tsev txhawb nqa daim ntawv thov ntawd. Paub meej tias qhov chaw nres nkoj tuaj yeem nthuav tawm ob 400G datapaths, tias ob qho tib si deb kawg tau sib xws nrog 400GBASE-FR4, thiab cov cabling muab ob txoj hauv kev LC duplex.
Piv txwv 4: High-Density 100G Breakout Los ntawm 800G-Class Port
Yuav tsum muaj:mus txog yim 100G txuas, ib qho - hom fiber ntau, ncav cuag li 2 km, thiab lub platform uas txhawb nqa 8 × 100G breakout.
Pib taw tes:ib 8 × 100G FR1 QSFP-DD800 architecture. Hauv Cisco cov ntaub ntawv ua tiav, cov qauv siv cov khoom sib txuas SMF los ntawm dual MPO-12 APC connectors. Cov nroj tsuag kho qhov muag thiab qhov kawg-kawg modules yuav tsum raug xaiv rau qhov tseeb breakout daim ntawv qhia es tsis yog rau "800G" hauv kev paub daws teeb.
Cov lus nug nquag
QSFP -DD transceiver yog dab tsi?
QSFP-DD transceiver yog qhov siab- qhov ceev pluggable module siv yim siab-ceev tswj hluav taws xob cuam tshuam. Nws yog dav siv rau 400G thiab 800G-chav kawm ntawv siv network thiab muaj kev sib raug zoo nrog rau QSFP ua ntej-tsev neeg daim ntawv.
Dab tsi yog qhov txawv ntawm QSFP-DD thiab QSFP-DD800?
QSFP-DD piav qhia txog qhov dav dua ob npaug- daim ntawv ntom ntom-factor tsev neeg. QSFP-DD800 yog qhov siab dua- tiam tshiab tsim nyob ib ncig ntawm cov kab hluav taws xob ceev ceev thaum tuav yim siab -ceev hluav taws xob cuam tshuam.
Puas yog QSFP-DD txhais tau tias 400G?
Tsis yog. QSFP-DD yog ib qho qauv, tsis yog tus nqi Ethernet ruaj khov. Nws yog siv thoob plaws ntau tiam neeg thiab kev siv.
QSFP28 module puas tuaj yeem txuas rau QSFP-DD chaw nres nkoj?
Ntau QSFP-DD platforms tau tsim los lees txais QSFP ua ntej-tsev neeg modules, suav nrog QSFP28, tab sis kev ua haujlwm tiag tiag yuav tsum tau lees paub rau kev hloov, kab npav, hom chaw nres nkoj, thiab software tso tawm.
QSFP puas tuaj yeem-DD module ntsaws rau hauv QSFP28 chaw nres nkoj?
Feem ntau tsis muaj. QSFP28 lub tawb qub txeeg qub teg tsis muab kev sib cuag nrog tus tswv tsev ntxiv thiab cov qauv hluav taws xob xav tau los ntawm QSFP-DD module.
Qhov txawv ntawm 400G DR4 thiab 400G FR4 yog dab tsi?
DR4 siv plaub qhov sib npaug ib zaug - hom kab kho qhov muag thiab feem ntau txuas los ntawm MPO. FR4 multiplexes plaub wavelengths mus rau ib tug duplex ib zaug - hom fiber ntau khub thiab feem ntau siv LC. Cov neeg sawv cev ncav cuag 500 m rau DR4 thiab 2 km rau FR4.
Puas yog tag nrho QSFP-DD transceivers siv MPO connectors?
Tsis yog. Nyob ntawm qhov kev sib txuas kho qhov muag, QSFP-DD modules yuav siv MPO, duplex LC, ntau qhov sib txuas LC, lossis lwm lub tshuab txuas. Lub connector yuav tsum tau kuaj nyob rau hauv cov ntaub ntawv module tshwj xeeb.
Puas tuaj yeem 800G QSFP-DD tawg mus rau 2 × 400G lossis 8 × 100G?
Qee QSFP-DD800 modules thiab host platforms txhawb cov ntawv thov no. Nws tsis yog universal. Txheeb xyuas qhov tseeb ntawm daim ntawv thov module, hloov pauv hom, deb -kawg interfaces, FEC, thiab cabling ua ntej xa mus.
Puas yog QSFP-DD zoo dua OSFP?
Tsis yog daim ntawv zoo tshaj yog universally zoo dua. QSFP-DD hais txog qhov chaw nres nkoj siab ceev thiab QSFP- tsev neeg tsiv teb tsaws chaw, thaum OSFP muab lub hnab ntawv loj dua nrog cov qauv tsim thermal ntau dua. Lub party platform feem ntau txiav txim siab seb daim ntawv twg tsim nyog.
