800G Ethernet yog qhov siab -Ethernet interface uas txav 800 gigabits ib ob ntawm ib qho chaw nres nkoj, ua los ntawm yim txoj kab hluav taws xob lossis kho qhov muag khiav ntawm kwv yees li 100 Gb / s txhua. Nws ua ob npaug ntawm ib -chaw nres nkoj bandwidth ntawm 400G Ethernet, uas tso cai rau lub network nqa tib lub peev xwm dhau qhov sib txuas tsawg dua ntawm cov keyboards, GPUs, thiab khaws cia - lossis muaj peev xwm ntau dua li tib lub racks.
Tab sis qhov tseem ceeb ntawm kev xa tawm tiag tiag tsis yog tus lej xov tooj . 800G hloov kho qhov muag koj yuav, cov fiber ntau thiab cov khoom sib txuas uas koj rub, lub zog thiab cua txias txhua lub khib yuav tsum nqus, thiab txoj hauv kev uas koj siv tau cov kev sib txuas ua ntej lawv mus nyob. Kho nws raws li qhov chaw nres nkoj- nrawm nrawm thiab koj yuav tsoo cov teeb meem uas tsis tuaj yeem zam tau; kho nws raws li kev txiav txim siab architecture thiab nws dhau los ua ib txoj hauv kev huv tshaj plaws los ntsuas AI lossis huab ntaub.
800G Ethernet yog dab tsi?
800G Ethernet, kuj sau 800GbE, xa Ethernet thav ntawv ntawm tus nqi sib sau ntawm 800 Gb / s. Tsis muaj ib lub cev lub cev teeb liab nqa tag nrho tus nqi. Hloov chaw, lub interface stripes cov ntaub ntawv hla yim txoj kab sib luag - yim txoj kab hluav taws xob los ntawm kev hloov ASIC mus rau lub module, thiab yim txoj kab kev kho qhov muag (lossis wavelengths) tawm mus rau fiber ntau - thiab nthuav tawm lawv mus rau lwm lub network raws li ib qho kev sib txuas lus.
Txhua txoj kab siv PAM4 signaling ntawm li 100 Gb/s (106.25 Gb/s ntawm cov xaim). Yim ntawm cov kab no muab rau koj 800 Gb / s. Cov qauv 8 × 100G no yog tus yam ntxwv ntawm 800G tiam tam sim no, thiab nws yog vim li cas ib qho 800G chaw nres nkoj tuaj yeem nkag mus rau ob lub 400G chaw nres nkoj lossis yim 100G chaw nres nkoj - muab qhov hloov pauv, optics, cabling, thiab cov cuab yeej nyob deb kawg txhua tus pom zoo li cas lub peev xwm sib faib.
800G Ethernet vs 400G Ethernet: Dab tsi tiag hloov
Qhov sib txawv pom tseeb yog tias 800G nqa ob zaug ntawm qhov sib sau ua ke ntawm 400G. Qhov sib txawv ntawm cov tswv yim yog dab tsi ua rau lub phiaj xwm phiaj xwm:
| Qhov xwm txheej | 400G Ethernet | 800G Ethernet muaj |
|---|---|---|
| Aggregate bandwidth | 400 Gb/s | 800 Gb/s (8 kab × ~ 100 Gb/s) |
| Lub luag haujlwm | Huab qaum, DCI, siab - nrawm sib sau | AI rov qab-kawg ntaub, hyperscale spine, ntom aggregation, 51.2T- chav kawm hloov |
| Hloov ASIC qhov yuav tsum tau ua | 50G-PAM4 SerDes | 100G-PAM4 SerDes - 400G hloov tsis tau tsuas yog khiav 800G modules |
| Fais fab rau qhov chaw nres nkoj | qis | Kwv yees li 12-17 W rau ib txwm DSP optic; mus txog ~ 30 W rau coherent |
| Cable rau vaj huam sib luag | Ntau qhov chaw nres nkoj thiab fiber ntau | Tsawg qhov chaw nres nkoj, tab sis cov khoom sib txuas denser (MPO-16) thiab kev siv nyiaj tsawg dua |
| Ecosystem kev loj hlob | Mature, dav interoperable | Loj hlob sai; interoperability tseem xav tau validation |
| Zoo tshaj plaws | Hnub no lub siab -kev sib txuas ceev nrog lub taub hau | Cov tes hauj lwm tsoo 400G muaj peev xwm, qhov ntom ntom, lossis qhov ntsuas qhov txwv |
Ib kab uas tsis pom zoo tshaj plaws yog qhov yuav tsum tau ASIC. Ib qho 800G QSFP-DD800 module yog qhov sib xyaw ua ke nrog 400G QSFP-DD tawb, yog li nws lub cev haum rau - tab sis nws xav tau tus tswv tsev ASIC uas txhawb nqa 100G-ib - txoj kab qhia. Tso ib qho rau hauv 50G-ib - txoj kab 400G hloov thiab nws yuav tsis xa 800G. Kev npaj peev xwm pib muaj, tsis yog ntawm lub ntsej muag.
Vim li cas 800G Ethernet tseem ceeb tam sim no
Kev lag luam kev lag luam siv los ntws feem ntau sab qaum teb- sab qab teb, nruab nrab ntawm cov neeg siv thiab cov ntawv thov. Kev cob qhia AI, loj - ntsuas qhov ntsuas, thiab cov khoom xa tawm tau hloov pauv tias: tam sim no kev tsheb hnyav yog sab hnub tuaj - sab hnub poob, nruab nrab ntawm cov accelerator thiab nruab nrab ntawm cov khoom khaws cia hauv cov ntaub. Thaum phav phav GPUs synchronize gradients lossis pauv qhov tsis sib xws, lub network - tsis yog xam - dhau los ua lub fwj.
Kev saws me nyuam qhia txog qhov kev nyuaj siab ntawd. Raws liDell'Oro Group's data center hloov kev kwv yees, 800G chaw nres nkoj xa khoom hla 20 lab units hauv li peb xyoos ntawm kev xa khoom thawj zaug - ib qho tseem ceeb ntawm 400G siv rau rau rau xya xyoo kom ncav cuag - rub yuav luag tag nrho los ntawm AI rov qab-kawg tes hauj lwm. Txoj kev nce siab yog qhov tseeb vim tias cov khoom ua haujlwm yog bandwidth - tshaib plab hauv txoj kev dav dav - lub hom phiaj kev suav yeej tsis yog.
AI thiab Machine Learning Fabrics
Hauv AI rov qab-kawg network, lo lus nug tiag tiag tsis yog seb 800G puas sai dua, tab sis seb nws puas txo qis cov nqi ntawm GPUs yam tsis tau tsim lub thermal tshiab lossis cabling bottleneck. Kev ua haujlwm sib koom ua ke xws li tag nrho - txo qis yog qhov nkag mus rau txoj kev qeeb tshaj plaws, yog li cov ntaub uas sib txuas suav nrog thaum tuav latency thiab congestion hauv daim tshev ncaj qha txhim kho lub sijhawm ua tiav txoj haujlwm. Tias yog vim li cas 800G tshwm sim thawj zaug ntawm tus txha nraub qaum-rau- nplooj ntawv uplinks thiab GPU-rau- nplooj ntawv txuas hauv pawg khiav RoCEv2, qhov twg tsis muaj tus cwj pwm tsis zoo thiab qhov ntsuas qhov ntsuas ntau npaum li cov khoom nyoos.
Huab thiab Hyperscale
Cov neeg ua haujlwm Hyperscale siv qhov chaw nres nkoj siab dua kom loj hlob bandwidth yam tsis muaj kev loj hlob racks nyuaj ntawm tib tus nqi. Ib qho 800G uplink hloov ob 400G uplinks, uas txhais tau tias tsawg dua cables, tsawg dua optics los tswj, thiab ntau lub taub hau rau ib chav tsev khib. Ntawm qhov ntsuas, qhov ntawd txhais ua cov ntsiab lus tsis ua haujlwm tsawg dua thiab cov kab hluav taws xob yooj yim dua - kev txuag kev ua haujlwm uas feem ntau tshaj qhov sib txawv ntawm - chaw nres nkoj tus nqi sib txawv.
Bandwidth ceev thiab lub zog
Raws li fabrics scale, bandwidth ib khib dhau los ua ib qho nyuaj tsim txwv. Lub tsev 800 Gb / s tawm ntawm ntau qhov chaw nres nkoj qeeb ua rau qhov chaw ntawm lub ntsej muag, sib txuas cov cabling, thiab ntxiv cov nyiaj siv ua haujlwm. Kev sib sau ua ke rau hauv 800G cov chaw nres nkoj tuaj yeem txo lub zog siv ib me ntsis txav - tab sis qee zaum tsuas yog. Lub hwj chim tiag tiag nyob ntawm qhov hloov ASIC, hom optic (ib kab - tsav LPO module tuaj yeem kos 4-10 W qhov twg DSP module kos 14-17 W), ncav cuag, thiab tsim kom txias. Kho "ntau dua" raws li daim ntawv thov los txheeb xyuas koj tus kheej ASIC thiab optics, tsis yog qhov lav.
800G Ethernet Standards: IEEE 802.3df, 800GBASE-R, thiab Lane Architecture
Qhov no yog qhov uas ntau 800G cov ntsiab lus nres luv luv. "800G" tsis yog ib qho kev qhia tshwj xeeb - nws yog ib pawg ntawm cov qauv muaj feem xyuam uas txhais tau tias tus nqi raug encoded, kho, thiab nqa ntau dua tooj liab thiab fiber ntau.
Los ntawm 800GBASE-R rau IEEE 802.3df
Thawj thawj 800G specification yog los ntawmEthernet Technology Consortium hauv 2020 li 800GBASE-R. Ntau dua li tsim cov qauv tshiab, nws tau rov tsim dua ob pawg ntawm 400G logic uas twb muaj lawm los ntawm IEEE 802.3bs, hloov kho kom faib cov ntaub ntawv hla yim 106-Gb/s lub cev txoj kab, thiab khaws tus qauv RS (544,514) rau pem hauv ntej kev ua yuam kev yog li tus nqi tshiab lub cev nyob twj ywm nrog kev xav uas twb muaj lawm. Qhov rov siv dua yog vim li cas 800G tuaj txog sai heev: feem ntau ntawm cov logic nyuaj twb muaj nyob rau ntawm 400G.
IEEE tom qab ntawd tau pom zoo rau tus qauv tsim.IEEE 802.3df-2024 IBtau tshaj tawm thaum Lub Peb Hlis 2024 raws li Kev Hloov Kho 9 rau IEEE Std 802.3-2022, ntxiv MAC tsis, txheej txheej, thiab kev tswj tsis pub dhau 800 Gb/s (thiab ntxiv 400 Gb/s lub cev khaubncaws sab nraud povtseg) raws li 100 Gb/s -ib, ntau tshaj {8} fiber ntau cov teeb liab tib- hom fiber ntau. Qhov hluav taws xob sib cuam tshuam ntawm ASIC thiab cov qauv ua raws li IEEE 802.3ck rau 100G-ib - kab teeb liab. Ua haujlwm rau cov kauj ruam tom ntej - 200 Gb/s ib txoj kab, ua rau plaub- txoj kab 800G thiab yim- txoj kab 1.6T - tab tom txhim kho hauv IEEE 802.3dj.
Qhov Layers Ua tiag tiag
Qhov siab -Ethernet txuas ceev yog ntau tshaj li ib kab. Plaub txheej ua haujlwm tiag tiag, thiab nkag siab lawv yog dab tsi cia koj nyeem ib daim ntawv transceiver kom raug:
- MACtuav Ethernet thav duab formatting thiab nkag mus rau qhov nruab nrab.
- PCS(Lub cev Coding Sublayer) encodes cov ntaub ntawv thiab kab txaij hla ntawm yim kab. Hauv 800GBASE-R, ob 400G PCS piv txwv raug hloov los pub rau ib qho 800G MAC.
- FEC(Forward yuam kev kho) kuaj thiab kho me ntsis yuam kev. Ntawm PAM4 ceev cov ntaub ntawv yuam kev yog siab txaus uas FEC tsis xaiv tau - nws yog qhov ua rau qhov txuas siv tau, thiab hom FEC cuam tshuam rau latency.
- PAM 4xa ob lub cim rau ib lub cim siv plaub theem amplitude es tsis txhob ntawm ob theem ntawm cov laus NRZ signaling, ob npaug ntawm cov ntaub ntawv tus nqi ib txoj kab ntawm tib baud tus nqi - ntawm tus nqi ntawm ntau lub teeb liab nruj dua - rau - suab nrov margins.
Hom PMD txhais tau tias 800G
Lub cev nruab nrab nyob nruab nrab (PMD) sublayer yog qhov "800G" hloov mus rau hauv ib qho tshwj xeeb module koj tuaj yeem xaj. IEEE 802.3df-2024 txhais ib tsev neeg ntawm yim- txoj kab, 100G-ib txoj kab PMDs:
- 800GBASE-CR8- yim txoj kab hla tooj liab (txuas txuas).
- 800GBASE-KR8- yim kab hla ib lub dav hlau rov qab.
- 800GBASE-VR8 / 800GBASE-SR8- yim txoj kab hla multimode fiber ntau, luv heev thiab ncav cuag luv.
- 800GBASE-DR8 thiab 800GBASE-DR8-2- yim sib npaug ib zaug - hom kab rau kwv yees li 500 m thiab 2 km.
Ib qho piv txwv ntawm kev tsis meej pem yog tsim nyog kho: qhov nrov 800G "FR4" thiab "LR4" modules yogtsis yog802.3df yim-kab PMDs. Hauv kev xyaum lawv raug xa raws li2 × FR4thiab2 × LR4- ob txoj kev ywj pheej 400G-FR4/LR4 optical engines siv CWDM4 wavelengths tshaj duplex ib leeg-mode fiber - los yog, nyob rau hauv lub tiam tshiab, raws li muaj tseeb plaub- kab optics ua nyob rau hauv 200 Gb/s-ib {{10} .IE 3 nyob rau hauv signaling. Thaum tus neeg muag khoom sau "800G FR4," paub meej tias nws yog 2 × 400G pab pawg lossis 200G-rau- txoj kab, vim tias ob txoj haujlwm sib txawv.
800G Optics thiab Form Factors: OSFP vs QSFP-DD800
Ob daim foos pluggable ua tus thawj 800G: OSFP thiab QSFP-DD800. Ob leeg nqa yim txoj kab ntawm 100G PAM4. Qhov txawv yog nyob rau hauv thermals, ceev, thiab rov qab compatibility - thiab cov lus teb yog nyob ntawm seb koj tab tom tsim.
OSFP
OSFP (Octal Small Form-factor Pluggable) tau tsim los ntawm qhov pib rau yim txoj kab siab - ceev thiab lub zog loj. Rau qhovOSFP MSA, daim ntawv foos txhawb nqa 400G (8 × 50G), 800G (8 × 100G), thiab 1.6T (8 × 200G), haum rau 36 chaw nres nkoj hauv 1U faceplate, thiab cov qauv sib txawv ntawm cov nkoj nrog kev sib xyaw ua ke rau thermal headroom. Lub taub hau ntawd yog vim li cas OSFP yog lub neej ntawd hauv NVIDIA tshiab-chav kawm AI pawg, qhov twg cov modules tuaj yeem khiav 12–17 W thiab tshaj.
Ib qho kev xa tawm nthuav dav uas sib koom ua ke: OSFP los ntawm kev sib xyaw ua ke -heatsink (IHS) tsw thiab caij -heatsink (RHS) tsw. NIC thiab qee qhov chaw nres nkoj server xav tau RHS; xaj IHS modules rau cov slots thiab lawv lub cev yuav tsis zaum. Paub meej tias hom heatsink tiv thaiv tus tswv ua ntej kev yuav khoom.
QSFP-DD800
QSFP-DD800 txuas ntxiv qhov pov thawj QSFP-DD tsev neeg mus rau 800G thaum ua kom zoo li qub. Nws cov ntsiab lus zoo dua yog rov qab sib raug zoo: raws li covQSFP-DD800 MSApiav qhia, QSFP-DD800 chaw nres nkoj kuj lees txais QSFP+, QSFP28, QSFP56, thiab 400G QSFP-DD modules, uas tso cai rau cov tswv lag luam rov siv cov qauv kev lag luam twb tau siv kwv yees li $ 9 nphom rau. Yog tias koj tab tom txhim kho QSFP cov cuab yeej cuab tam es tsis yog lub tsev cog qoob loo, qhov kev txuas ntxiv ntawd tseem ceeb heev. QSFP{10}}DD800 tsim ncaj qha rau ntawm qhov davQSFP-DD form factor, yog li cov tawb, vaj huam sib luag, thiab cov cuab yeej ua haujlwm nqa mus tom ntej. DSP-raws li QSFP-DD800 modules feem ntau kos 14–17 W, nrog LPO variants nyob rau hauv 4–10 W ntau.
800G OSFP vs QSFP-DD800: Koj Yuav Tsum Xaiv Qhov twg?
Qhov kev sib cais ncaj ncees yog: tsim rau thermals thiab 1.6T txoj kev qhia, los yog tsim kom ceev thiab rov siv dua.
- Xaiv OSFPrau tshiab AI kev cob qhia fabrics qhov twg txhua qhov chaw nres nkoj khiav kub, thermal margin teeb meem, thiab koj xav tau ib txoj kev huv si rau 1.6T (OSFP-XD / OSFP1600).
- Xaiv QSFP-DD800Thaum koj tab tom txuas ntxiv QSFP uas twb muaj lawm -DD hloov khoom vaj khoom tsev, xav tau pem hauv ntej- vaj huam sib luag ntom ntom, thiab xav tiv thaiv kev nqis peev ua ntej optics thiab cabling.
Tsis txhob xaiv qhov nrov. Qhov kev txiav txim siab yog tsav los ntawm kev hloov lub platform uas koj tau xaiv, qhov optics tiag tiag muaj rau nws, qhov txuas txuas koj xav tau los npog, koj hom fiber ntau, thiab koj qhov kev tsim kom txias.
800G Optics Hom los ntawm Reach thiab Fiber
Thaum cov txheej txheem tau teeb tsa, qhov optic yog xaiv los ntawm kev ncua deb thiab fiber ntau, tsis yog los ntawm qhov chaw nres nkoj ceev. Qhov no yog ib qho kev xaiv zoo tshaj plaws rau ib txoj haujlwm 800G - nws yog qhov sib txawv ntawm kev xaj ib lub teeb uas teeb thiab ib qho uas tsis tuaj yeem ncav cuag qhov kawg. Kev ncav cuag hauv qab no yog cov txiaj ntsig kev lag luam zoo ib yam; ib txwm paub meej tiv thaiv cov ntaub ntawv tshwj xeeb.
| Optic | Kev tsim vaj tsev | Fiber ntau | Hom ncav cuag | Txuas | Qhov twg nws haum |
|---|---|---|---|---|---|
| 800G SR8 / VR8 | 8 × 100G, 850 nm VCSEL | OM4 / OM5 multimode | ~ 30–100 m (VR8 luv tshaj) | MPO-16 los yog 2 × MPO-12 | GPU server rau ToR, intra-rack AI txuas |
| 800g DR 8 | 8 × 100G parallel ib zaug - hom | OS2 single-mode | 500 m | MPO-16 | qaum- nplooj; tawg mus rau 2 × 400G los yog 8 × 100G |
| 800G DR8-2 (DR8+) | 8 × 100G parallel ib zaug - hom | OS2 single-mode | 2km ua | MPO-16 | Ntev ib zaug - hom, lub tsev kawm ntawv ncua sij hawm |
| 800g 2 × FR4 (FR8) | 2 × 400G-FR4, CWDM4 | OS2 single-mode | 2km ua | Dual LC / Dual CS | Fiber- ua tau zoo DCI; txuas ob 400G-FR4 xaus |
| 800g 2 × LR4 | 2 × 400G-LR4, CWDM4 | OS2 single-mode | 10km ua | Dual LC / Dual CS | Metro thiab ntev DCI |
| 800G ZR / ZR + | Coherent | OS2 single-mode | 80km + | Duplex LC | Ntev -haul data center interconnect |
Ob peb txoj cai siv tau ncaj nraim tawm ntawm lub rooj no. SR8 thiab VR8 tsuas yog kev xaiv ntau hom, thiab covOM3 / OM4 / OM5 qib koj tau nruabcaps deb npaum li cas lawv ncav cuag. Txhua qhov - hom optic saum toj no khiav dhau OS2, thiab qhov tseebib leeg - hom fiber ntauinfluences poob thiab nyob deb. Hauv qab cov kev xaiv kho qhov muag, tooj liab thiab cov kab hluav taws xob ua haujlwm npog qhov luv luv: passive DAC rau kev khiav mus txog ob peb meters, active hluav taws xob cable (AEC) rau qhov kwv yees li 3-7 m nyob rau hauv thiab nruab nrab ntawm cov racks uas nyob ib sab, thiab AOC qhov chaw ruaj khov module-ntxiv rau- fiber ntau sib dhos yog yooj yim.
800G Breakout: 2 × 400G, 4 × 200G, thiab 8 × 100G
Ib qho ntawm cov khoom siv tau zoo tshaj plaws ntawm 800G platforms yog breakout. Vim tias qhov chaw nres nkoj yog yim txoj kab, nws tuaj yeem sib cais. Nyob ntawm qhov hloov pauv, optic, thiab cable sib dhos, 800G chaw nres nkoj yuav khiav li 1 × 800G, 2 × 400G, 4 × 200G, lossis 8 × 100G.
Qhov no tseem ceeb vim tias yuav luag tsis muaj lub network txav mus rau 800G txhua qhov chaw ib zaug. Kev xa tawm tiag tiag tso 800G hauv qaum qaum lossis AI rov qab- xaus thaum nplooj, chaw cia, thiab chaw nres nkoj server nyob ntawm 100G, 200G, lossis 400G. Piv txwv li, 800G DR8 chaw nres nkoj, feem ntau tawg tawm mus rau 2 × 400G-DR4 lossis 8 × 100G los pub cov khoom siv qis dua -ceev ceev, thaum lub 2 × FR4 module txuas ob qhov uas twb muaj lawm 400G-FR4 endpoints uas tsis muaj breakout cable kiag li.
Breakout kuj yog qhov kev xav mus tsis ncaj ncees lawm. Lub connector, fiber ntau polarity, txoj kab kev taw qhia, hloov NOS version, optic hom, thiab kev txhawb nqa ceev txhua tus yuav tsum tau kab - thiab tsis yog txhua txhua 800G chaw nres nkoj txhawb nqa txhua hom kev tawm hauv txhua qhov software tso tawm. Npaj sab cev nqaij daim tawv thaum ntxov: xaiv qhovtxoj cai MPO breakout cablerau kev sib cais koj npaj siab yog qhov tseem ceeb raws li lub module nws tus kheej, thiab qhov davMTP tiv thaiv MPO connector kev txiav txim siabcuam tshuam qhov ntom ntom thiab kev pabcuam thoob plaws tag nrho cov ntaub.
Qhov twg 800G Ethernet siv - thiab Dab tsi Txhua Qhov Kev Xav Tau
Cov ntaub ntawv siv sib tshooj, tab sis cov kev xav tau tom qab lawv txawv. Kev sib piv ntawm optic thiab topology rau cov khoom ua haujlwm yog qhov sib cais ua haujlwm 800G ntaub los ntawm tus nqi kim.
- AI kev cob qhia thiab inference fabrics.Qhov tseem ceeb tshaj plaws yog qhov tsawg, kev kwv yees latency nyob rau hauv hnyav synchronization, tsis muaj kev thauj mus los (RoCEv2), thiab huv si sib npaug (ECMP) hla cov ntaub. Kev ncav cuag feem ntau yog luv, yog li SR8 nyob rau hauv lub khib thiab DR8 hla qaum- nplooj dominate; Cov thermals thawb cov no mus rau OSFP.
- Huab thiab hyperscale.Qhov tseem ceeb tshaj plaws yog scalable, rov ua dua ntaub muaj peev xwm . 800G consolidates qaum- nplooj uplinks thiab inter-pod bandwidth; Rov qab sib raug zoo thiab kev ua haujlwm yooj yim feem ntau coj cov no mus rau QSFP-DD800.
- High -kev ua tau zoo suav.Qhov tseem ceeb tshaj plaws yog kev kwv yees cov ntaub ntawv txav mus los ntawm kev suav thiab cov khoom khaws cia, uas txhais tau hais tias kev tswj hwm congestion thiab qis -latency hloov pauv qhov teeb meem ntau dua li qhov siab tshaj plaws.
- Kev khaws cia thiab kev txheeb xyuas.Qhov tseem ceeb yog txhawb nqa los ntawm cov ntaub ntawv loj loj thiab kev txheeb xyuas; qhov kev txwv feem ntau yog ceev ceev npaum li cas thiab cov ntaub tuaj yeem nyob twj ywm, tsis yog qhov chaw nres nkoj tus nqi.
- Data center kev sib txuas.Qhov tseem ceeb hloov mus kom txog, muaj fiber ntau, thiab nyiaj siv hluav taws xob. Ntawm no 2 × FR4 (2 km), 2 × LR4 (10 km), thiab coherent ZR / ZR + (80 km+) yog cov kev xaiv cuam tshuam, feem ntau nqa ntau dua - fiber ntau - suavMPO / MTP lub cev cablehauv qaum.
Thaum twg Koj Yuav Hloov Kho Ntawm 400G rau 800G?
800G khwv tau nws qhov chaw thaum muaj lub fwj ntsuas ntsuas tau - tsis yog thaum nws tsuas muaj. Saib rau cov cim qhia ua ntej ua ntej:
- 400G uplinks khiav tsis tu ncua saum toj no kwv yees li 50-70% kev siv, txiav txim siab ntawm 95 feem pua tsis yog qhov siab tshaj.
- Npuag oversubscription koj tsis tuaj yeem daws los ntawm kev sib npaug ntawm kev tsheb lossis ntxiv ob peb qhov txuas.
- Ib pawg GPU kev ntsuas qhov ntsuas mus rau qhov chaw uas ib -accelerator bandwidth xav tau tshaj qhov 400G muab yam tsis muaj kev them nyiaj ntau dhau.
- Ntsig chaw nres nkoj suav los yog fiber ntau txoj kev mus txog kev qaug zog.
- Kev tsim kho tshiab nyob ib puag ncig 51.2T-chav hloov pauv, qhov twg 800G tsuas yog qhov chaw nres nkoj ceev.
400G tseem yog cov lus teb raug thaum cov kev sib txuas tsis siv, cov ntawv thov tsis yog network- khi, cov hloov tam sim no tsis muaj 100G-PAM4-muaj peev xwm ASICs (yog li 800G yuav yuam kom hloov kho lub forklift), lossis lub zog thiab cua txias tsis npaj rau 12-17 W ib qhov chaw nres nkoj ntawm qhov siab ceev.
Piv txwv kev tsiv teb tsaws chaw.Ib pab neeg khiav 400G txha nraub qaum- nplooj ntaub uas tau xis nyob rau ob xyoos. Ib pawg GPU tshiab los hauv online, sab hnub tuaj - tsheb khiav sab hnub poob nce, thiab 95th- feem pua kev siv ntawm tus txha nraub qaum uplinks nyob ib ncig ntawm 80%. Ntau dua li rov-kab txuas ntxiv 400G txuas, lawv qhia 800G ntawm tus txha nraub qaum nkaus xwb: 800G DR8 dhau ib zaug- hom rau 500 m qaum- rau- nplooj khiav, nrog txhua qhov 800G chaw nres nkoj tawg tawm mus rau 2 × 400G qhov hloov pauv ntawm nplooj Kev nkag mus rau server nyob ntawm 200G. Cov yeej yog tiag tiag - txuas suav nrog tus txha nraub qaum ib nrab thiab lub taub hau rov qab los - tab sis qhov project nto peb yam ua ntej: qhov hloov tshiab xav tau 100G-PAM4 SerDes, txhua qhov chaw nres nkoj ntxiv ~ 15 W ntawm tshav kub lub racks yuav tsum nqus, thiab DR8 txuas ntxiv yuav tsum muaj ib qho kev sib tw dhau los ntawm ntau lub sijhawm, {{31} . yuav tsum tau hloov, tsis rov siv dua.
Yuav Ua Li Cas Npaj Kev Txhim Kho 800G Ethernet
Ib qho kev hloov kho 800G yog qhov project architecture network, tsis yog kho vajtse tshiab. Cov kauj ruam no txav mus los ntawm "vim li cas" mus rau "validate."
Kauj Ruam 1: Txhais qhov teeb meem tsheb
Pib nrog lub bottleneck, tsis yog qhov chaw nres nkoj. Puas yog 400G uplinks congested ntawm lub hauv paus ruaj khov? Puas yog sab hnub tuaj - kev tsheb khiav sab hnub poob tawm ntawm cov ntaub? Puas yog AI lossis cov chaw ua haujlwm khaws cia tawg? Puas yog cov ntaub ntawv sau npe, lossis koj puas khiav tawm ntawm cov chaw nres nkoj lossis fiber ntau? Yog tias koj tsis tuaj yeem taw tes rau qhov muaj peev xwm lossis teeb meem congestion nrog cov ntaub ntawv tom qab nws, 800G yog ntxov ntxov.
Kauj ruam 2: Daim ntawv qhia Topology
Txiav txim siab qhov twg 800G mus ua ntej. Cov ntsiab lus nkag ib txwm yog txha nraub qaum-rau- nplooj ntawv uplinks, AI rov qab-kawg ntaub, siab- muaj peev xwm sib sau ua ke, DCI txuas, thiab khaws cia sib sau ua ke. Cov pab pawg feem ntau qhia txog 800G hauv qaum qaum lossis AI ntaub thaum khaws cov neeg rau zaub mov nkag ntawm 100G, 200G, lossis 400G, nrog kev sib tsoo ntawm ob qho tib si.
Kauj ruam 3: Kos Hloov thiab ASIC Muaj Peev Xwm
Ob lub keyboards nrog 800G ports tsis sib npaug. Paub meej tus naj npawb ntawm 800G cov chaw nres nkoj, kev txhawb nqa daim ntawv, hloov lub peev xwm, latency thiab tsis tus cwj pwm, kev txhawb nqa kev tawg, RoCEv2 / lossless nta, telemetry thiab automation hooks, NOS kev loj hlob, thiab cov neeg muag khoom kev sib cuam tshuam kev soj ntsuam. Rau AI thiab HPC, congestion cwj pwm nyob rau hauv load yog txiav txim siab raws li raw throughput.
Kauj ruam 4: Xaiv Txoj Cai Optics
Siv qhov ncav cuag -thiab- cov lus fiber ntau saum toj no. Sib piv cov optic kom deb li deb, hom fiber ntau, connector, nyiaj siv hluav taws xob, qhov kub thiab txias, kev xav tau kev sib tw, thiab kev txheeb xyuas kev hloov pauv kev sib raug zoo - tom qab ntawd xyuas cov sij hawm txhuas, uas yog qhov txwv tiag tiag rau 800G optics thiab DSPs. Ib txwm paub meej tias cov ntaub ntawv transceiver tiv thaiv qhov hloov pauv hloov matrix ua ntej xaj.
Kauj Ruam 5: Siv tau Fiber thiab Cable
800G nthuav tawm qhov tsis muaj zog ntawm qhov txuas qeeb qeeb. Ua ntej hloov kho dua tshiab, xyuas cov fiber ntau thiab qib, qhov txuas txuas thiab kev huv, polarity, thaj - vaj huam sib luag muaj peev xwm, khoov vojvoog, thiab qhov cuam tshuam ntawm huab cua ntawm denser cabling. Qhov tseem ceeb tshaj, paub meej tias qhov txuas nyob hauv nwsinsertion- poob nyiaj txiag- ntawm PAM4, qhov sib txuas sib txuas lossis lub ntsej muag qias neeg uas dhau los ntawm qhov nrawm qis tuaj yeem thawb qhov txuas mus rau qhov tsis raug. Qhov chaw nres nkoj ceev tsis muaj nqi yog tias lub cev txheej tsis huv thiab ruaj khov.
Kauj Ruam 6: Npaj lub zog thiab txias
800G optics thiab keyboards thawb nyuaj rau lub zog thiab thermals. Ib qhov ntom 800G hloov tuaj yeem kos rau ntawm qhov kev txiav txim ntawm 700-1,000 W, thiab txhua qhov chaw nres nkoj ntxiv kwv yees li 12-17 W ntawm cov cua sov. Saib xyuas lub hwj chim khib nyiab, pem hauv ntej- mus rau- rov qab airflow, module ntsuas kub, kiv cua tus cwj pwm, cable thaiv, kub / txias aisle tsim, thiab seb yuav tsum tau ua kua los yog txias txias. Tsis quav ntsej qhov no ua rau muaj kev cuam tshuam, txuas tsis ruaj khov, lossis ua rau lub neej luv luv.
Kauj Ruam 7: Ua ntej Scaling
Ua pov thawj hauv kev tswj xyuas ua ntej tso tawm: txuas coj- nce, FEC tus cwj pwm, latency, pob ntawv poob, kev tuav pov hwm, kev coj tus cwj pwm tawg, telemetry visibility, optics kub, ntau - neeg muag khoom interoperability, thiab tsis ua haujlwm. Tus kws tsav dav hlau nthuav tawm cov teeb meem uas nyuaj dua los kho thaum cov ntaub yog nyob rau hauv ntau lawm.
Feem ntau 800G yuam kev kom zam
- Kho 800G raws li kev poob -in.Nws tuaj yeem xav tau optics tshiab, fiber ntau, cua txias, hloov kev teeb tsa, thiab saib xyuas - thiab hloov ASIC uas txhawb nqa 100G ib txoj kab.
- Tsis quav ntsej cov ntsiab lus tawg.Paub meej tias hloov software, optics, cables, deb-kawg cov khoom siv, thiab kab ntawv qhia ua ntej xaj. Ib qho 800G chaw nres nkoj uas "txhawb kev tawm tsam" yuav tsis txhawb hom pes tsawg uas koj xav tau ntawm NOS qhov koj khiav.
- Xaiv optics los ntawm kev ncav cuag ib leeg.Fais fab, thermals, connector hom, interoperability, thiab muaj tag nrho cov teeb meem - thiab sib tov fiber ntau hom yog ib tug classic tsis ua hauj lwm, txij li thaum DR8 / FR4 / LR4 xav tau ib tug - hom thiab yuav tsis ua hauj lwm tshaj multimode cog.
- Overlooking congestion tswj.Rau AI thiab HPC, bandwidth ib leeg tsis lav kev ua haujlwm; Lossless thauj, tswj congestion, thiab load balancing txiav txim nws.
- Tsis nco qab ua haujlwm.Siab -kev sib txuas ceev xav tau telemetry muaj zog - optical fais fab, module kub, FEC yuam kev, pob ntawv poob, kab qhov tob, thiab txuas kev ruaj ntseg txhua qhov xav tau qhov muag ntawm lawv.
FAQ: 800G Ethernet
Q: 800G Ethernet yog dab tsi?
A: 800G Ethernet yog Ethernet interface uas nqa 800 Gb / s ntawm kev sib sau ua ke hla yim kab ntawm kwv yees li 100 Gb / s txhua. Nws yog siv feem ntau hauv AI pawg, hyperscale thiab huab ntaub, HPC, thiab lwm yam bandwidth -cov ntaub ntawv chaw nyob ib puag ncig.
Q: Puas yog 800G Ethernet sai dua 400G Ethernet?
A: Yog - nws nqa ob zaug ntawm qhov sib sau ua ke bandwidth. Tiag -cov txiaj ntsig hauv ntiaj teb yog nyob ntawm tus qauv tsim network, optics, qauv tsheb, thiab seb qhov kawg thiab hloov ASIC txhawb nqa 100G-rau- kab teeb liab.
Q: Lub zog npaum li cas ntawm 800G module siv?
A: Ib qho zoo DSP-raws li 800G optical modules kos kwv yees li 12–17 W. Linear-tsav LPO variants tuaj yeem khiav hauv 4–10 W ntau yam, thaum coherent ZR / ZR + modules rau ntev - nrug DCI tuaj yeem ncav cuag 20–25 W. Qhov ntsuas kub ntawm qhov no tsis yog rack.
Q: Qhov twg 800G optic kuv yuav tsum xaiv rau 500 m, 2 km, lossis 10 km?
A: Txog li ~ 100 m siv SR8 / VR8 ntawm ntau hom (lossis tooj liab / AOC rau hauv - khib). Rau 500 m tshaj ib hom -, DR8 yog tus neeg ua haujlwm. Txog li 2 km, siv DR8-2 lossis 2 × FR4. Rau 10 km, siv 2 × LR4, thiab rau 80 km + siv coherent ZR/ZR+.
Q: 800G puas tuaj yeem khiav ntawm kuv cov fiber ntau uas twb muaj lawm?
A: Qee zaum. SR8 xav tau OM4/OM5 multimode; DR8, 2 × FR4, 2 × LR4, thiab ZR txhua tus xav tau OS2 ib hom -. Parallel optics xws li SR8 thiab DR8 siv MPO-16, uas yuav txawv ntawm MPO ntsia tau-12 cog, thaum 2 × FR4 / 2 × LR4 siv duplex LC. Txawm tias qhov twg fiber ntau qhov sib tw, paub meej tias qhov txuas nyob hauv nws qhov kev tso nyiaj-tsis muaj peev xwm - cov khoom sib txuas thiab qhov kawg uas dhau los ntawm qhov qis qis tuaj yeem ua tsis tiav ntawm PAM4.
Q: Qhov txawv ntawm OSFP thiab QSFP -DD800 yog dab tsi?
A: Ob qho tib si yog yim- txoj kab 100G-PAM4 daim ntawv foos. OSFP muaj ntau dua thermal headroom thiab ib txoj hauv kev huv rau 1.6T, uas haum rau pawg AI tshiab; QSFP-DD800 yog qhov sib npaug thiab rov qab sib haum nrog QSFP tsev neeg, uas haum rau kev hloov kho tshiab ntawm QSFP cov cuab yeej cuab tam tam sim no. Qhov kev xaiv yog nyob ntawm kev hloov pauv, muaj optics, tsim thermal, thiab ncav cuag.
Q: 800G ports puas tuaj yeem txuas rau 400G lossis 100G khoom siv?
A: Ntawm ntau lub platform, yog, ntawm kev tawg xws li 2 × 400G, 4 × 200G, lossis 8 × 100G. Nws nyob ntawm qhov hloov pauv, optics, cables, thiab software, yog li xyuas kom meej tias qhov tshwj xeeb breakout hom tau txais kev txhawb nqa ua ntej xa mus.
Q: Puas yog 800G Ethernet tsuas yog rau cov chaw khaws ntaub ntawv hyperscale?
A: Tsis yog. Hyperscale thiab AI cov tswv lag luam yog cov neeg siv khoom thaum ntxov, tab sis cov chaw muab kev pabcuam, cov chaw lag luam loj, HPC qhov chaw, thiab kev xa tawm DCI tuaj yeem ua rau tag nrho 800G qhov kev lag luam loj hlob tuaj.
Ntsiab Cai
800G Ethernet tau dhau los ua lub hauv paus hauv paus rau AI-era data centers, txhais los ntawm yim- txoj kab, 100G-per- txoj kab architecture ntawm IEEE 802.3df-2024 thiab 800GBASE-R. Nws xa cov bandwidth siab dua rau ib qhov chaw nres nkoj thiab txoj hauv kev ua kom muaj txiaj ntsig rau AI, huab, HPC, thiab cov ntaub ntom ntom - thiab txoj kev khiav mus rau 1.6T.
Tab sis qhov kev vam meej 800G hloov kho yog nyob ntawm ntau dua qhov hloov pauv sai. Nws txhais tau hais tias sib piv cov qauv tsim (OSFP lossis QSFP-DD800) rau kev ua haujlwm, xaiv optics los ntawm kev ncav cuag thiab fiber ntau, lees paub qhov hloov ASIC txhawb nqa 100G ib txoj kab, ua kom cov nroj tsuag fiber ntau tiv thaiv kev siv nyiaj ntau dua, thiab npaj rau 12-17 W ntawm cov cua sov ib qho chaw nres nkoj. Yog tias koj lub network tau nce mus txog 400G kev txwv lossis koj tab tom tsim rau AI thiab siab - kev ua haujlwm ua haujlwm, pib nrog kev txheeb xyuas kev tsheb khiav, ua kom pom tseeb ntawm lub cev txheej, sim ua qhov kev xa tawm tsis pub dhau, thiab tom qab ntawd ntsuas qhov tseeb ntawm txoj kev tsiv teb tsaws chaw.
