QSFP-DD, QSFP +, QSFP28 thiab QSFP56 yog los ntawm QSFP daim ntawv foos, tab sis dab tsi yog qhov sib txawv ntawm lawv? Cov sib txawv piav qhia hauv cov lus piav qhia nram qab no.
Cov Qauv
Hais txog qhov pom, qhov dav, ntev thiab tuab ntawm QSFP-DD yog tib yam li QSFP +, QSFP28 thiab QSFP56. Tab sis QSFP-DD module tau nruab nrog 8-txoj kab hluav taws xob sib tshuam es tsis yog 4 txoj kab zoo ib yam li QSFP cov qauv thiab ASIC cov chaw nres nkoj ntawm QSFP-DD yog ob npaug los txhawb kev cuam tshuam rau tam sim no xws li CAUI-4. Yog li ntawd, cov tshuab sib xyaw ntawm QSFP-DD ntawm lub rooj tsav xwm tswj hwm yog me ntsis tob dua li ntawm lwm QSFP system transceivers kom haum rau cov kab sib txuas ntxiv.
Bandwidth& Thov
QSFP-DD qauv tuaj yeem txhawb nqa 400Gbps thaum QSFP + / QSFP28 / QSFP56 tsuas tuaj yeem ncav cuag 40Gbps / 100Gbps / 200Gbps ua ke. Yog li no, QSFP-DD cov khoom siv txuas yog siv rau hauv 400G optical modules, DACs thiab AOCs, thiab thov rau 400G cov ntaub ntawv txuas nruab nrab. Thiab QSFP + / QSFP28 / QSFP56 modules thiab DAC / AOC siv rau 40G / 100G / 200G tes hauj lwm. kev sib tshuam.
Rov qab sib raug
Raws li tau hais los saum toj no, QSFP-DD tuaj yeem thim rov qab tau tshaj nrog QSFP system yav dhau los transceiver modules. Hauv lwm lo lus, raws li daim ntawv dhau los, QSFP-DD tau raug kho dua tshiab los txhawb nqa kev txhawb nqa bandwidth. Thiab nws rov qab sib raug zoo tuaj yeem zam cov khoom uas twb muaj lawm hloov ntawm cov ntsuas thiab muaj peev xwm txo cov nqi network nce ntxiv.
| Daim Ntawv Qhia Qhov Tseeb | QSFP-DD | QSFP56 | QSFP28 | QSFP + |
|---|---|---|---|---|
| Tso Xyoo | 2016 | 2018 | 2016 | 2010 |
| Tus naj npawb ntawm Cov Hluav Taws Xob Kev Sib Tw | 8 | 4 | 4 | 4 |
| Ib Leeg Tu Tus Nqi | 25Gbps / 50Gbps | 50Gbps | 25Gbps | 10Gbps |
| Tes Haujlwm Tshuab | NRZ / PAM4 | PAM4 | NRZ | NRZ |
| Rov qab sib raug | QSFP + / QSFP28 / QSFP56 | QSFP + / QSFP28 | QSFP + | / |
QSFP-DD vs OSFP / CFP8 / COBO
QSFP-DD (QSFP56-DD) thiab OSFP / CFP8 / COBO yog cov qauv ntawm 400G optics ntawm kev ua lag luam, qhov sib txawv ntawm lawv tau teev hauv qab no:
QSFP-DD vs OSFP
QSFP yog qhov tshiab pluggable daim ntawv foos nrog yim yim hluav taws xob muaj hluav taws xob uas yuav pib txhawb nqa 400Gb / s (8x50G) lossis nce mus txog 800Gb / s. Qhov dav, qhov ntev thiab tuab ntawm QSFP-DD yog 18.35mm, 89.4mm thiab 8.5mm, thaum cov OSFP yog 22.58mm, 107.8mm thiab 13.0mm. Nws pom tseeb tias OSFP daim ntawv foos tau me ntsis dav thiab tob dua QSFP-DD, tab sis nws tseem txhawb nqa 36 OSFP cov chaw nres nkoj rau 1U pem hauv ntej vaj huam sib luag, ua kom 14.4Tb / s ib 1U.
Feem ntau, kev siv fais fab ntawm QSFP-DD yog 7-12W, thaum OSFP tuaj yeem ncav cuag 12-15W. Qhov qis zog siv hluav taws xob tsawg, qhov zoo dua qhov ua tau zoo ntawm transceiver. Tsis zoo li QSFP-DD, OSFP tsis tuaj yeem rov qab tau nrog QSFP + / QSFP28 vim nws muaj qhov loj dua QSFP + / QSFP28.
QSFP-DD vs CFP8
Featuring 41.5mm * 107.5mm * 9.5mm daim ntawv foos, CFP8 module xa plaub zaug ntau dua bandwidth dua li cov kev daws teeb meem 100G tam sim no. Nws cov hluav taws xob sib txuas tau feem ntau hais kom pom zoo rau 16x25 Gb / s thiab 8x50 Gb / s hom. Txij li qhov loj me ntawm CFP8 yuav luag peb npaug loj dua QSFP-DD, kev siv fais fab ntawm CFP8 ntau dua li QSFP-DD. Lub sijhawm no, CFP8 tsis tuaj yeem siv rau hauv QSFP + / QSFP28 ports. Bandwidth ntau ntawm CFP8 thiab QSFP-DD yog 400Gb / s, tab sis CFP8 tsuas yog txhawb nqa nyob rau hauv daim ntawv ntawm 16x25G lossis 8x50G thaum QSFP-DD kuj txhawb nqa ob qho 200Gb / s (8x25G).
QSFP-DD vs COBO
COBO sawv rau Consortium rau On-Board Optics, nws tuaj yeem nruab rau sab hauv rau cov khoom siv kab-daim npav hauv chaw tswj hwm, uas tsis muaj kev yoog raws. Thiab nws tsis txhawb nqa kub-pluggable, yog li nws nyuaj rau COBO modules tswj dua QSFP-DD. Tsis tas li ntawd, COBO daim ntawv foos muaj ob lub qhov cuam tshuam hluav taws xob —— ib yim yim kab thiab kaum plaub txoj kab khiav kom tau raws li ob qho 1x400G thiab 2x400G kev xa khoom.
Cov duab qhia hauv qab no qhia cov lag luam kev loj hlob ntawm QSFP-DD, OSFP, CFP8 thiab COBO cov foos yam tseem ceeb. Cov zauv loj dua, cov lag luam kev loj hlob tiav ntawm cov foos yam.
| Kev ua tau zoo | CFP8 | OSFP | QSFP-DD | COBO |
|---|---|---|---|---|
| Ntim | 1 | 2 | 3 | 4 |
| Kev Siv Hluav Taws Xob | 3 | 2 | 1 | 4 |
| Nqi | 1 | 3 | 4 | 2 |
| Loj Hlob | 4 | 3 | 2 | 1 |
| Kev nplua | 3 | 2 | 4 | 1 |
| Nyuaj rau Kev Ua Haujlwm& Txij nkawm | 2 | 3 | 4 | 1 |
| Tshaj suav sau | 14 | 15 | 18 | 13 |
Peb tuaj yeem pom los ntawm lub rooj hais tias tag nrho cov qhab nia ntawm QSFP-DD thiab OSFP daim ntawv foos yog siab dua lwm cov qauv foos. Yog li QSFP-DD thiab OSFP yog cov nrov dua nrog cov neeg xa khoom fiber ntau. Thaum lub qub yog haum rau cov ntaub ntawv chaw thov thiab tom kawg feem ntau tau thov rau kev siv xov tooj.
