Pom los ntawm lawv cov npe kev lag luam, QSFP56, QSFP28 thiab QSFP + zoo heev ntawm qhov lawv sib koom QSFP daim ntawv zoo ib yam li lawv cov ntawv tom qab qhia, thiab lawv muaj qhov loj me ib yam. Txawm li cas los xij, lawv cov ntaub ntawv chaw thiab kev sib txuas muaj peev xwm sib txawv. Hauv qab no yog cov kab npe teev cov kab kev pib ntawm QSFP56, QSFP28, thiab QSFP +.
| Kev lag luam npe | Xyoo | Abbreviated rau | Tus Naj Npawb Hluav Taws Xob | Tus naj npawb ntawm Optical Lanes | Tus Nqi Them / Txoj Kab | Tes taws | Kab Tus Nqi |
|---|---|---|---|---|---|---|---|
| QSFP + | 2013 | Quad Daim Ntawv Me-Qhov Cuam Tshuam Me Ntxiv | 4 | 4 | 10Gbps | NRZ | 40G |
| QSFP28 | 2016 | Quad Daim Ntawv Me-Qhov Tshem Tawm Pluggable 28 | 4 | 4 | 25Gbps | NRZ | 100G |
| QSFP56 | 2017 | Quad 50 Gigabits Daim Ntawv Me-Qhov Cuam Tshuam Me | 4 | 4 | 50Gbps | PAM4 | 200G |
Los ntawm daim ntawv sib piv, nws tuaj yeem pom meej meej tias piv nrog QSFP + thiab QSFP28, QSFP56 daim foos ua haujlwm ua rau lub network siab dua raws li 200G QSFP txhawb 4 × 50G raws. Thaum QSFP + yog qhov hloov ntawm QSFP los txhawb 4 × 10G raws nqa 10G Ethernet, 10G fiber ntau channel lossis QDR InfiniBand. Nws nthuav tawm lub tswv yim ntawm multiplexing plaub txoj kab nce kom nce bandwidth, muaj peev xwm tuav 40Gbps kab kab ntawm 10GBaud NRZ ib txoj kab. QSFP28 txhawb nqa 4 × 25G raws thiab muaj 4-txoj kab hluav taws xob xa khoom thiab 4-txoj kab hluav taws xob kho qhov muag raws li QSFP + ua tau.
Cov kev hloov tseem ceeb tshaj plaws los ntawm QSFP + thiab QSFP28 mus rau QSFP56 yog tias QSFP56 ua qhov hloov ntawm NRZ encoding mus rau PAM4 encoding. Txawm hais tias QSFP56 tseem siv 4 kab khiav raws li QSFP28, qhov kev hloov kho tau muab ob npaug rau 50G rau ib channel, uas tuaj yeem ua cov ntaub ntawv ntau dua ntawm cov kab ua kom muaj, raws li, tsim nyog rau hyper-scale cov ntaub ntawv chaw network.
Hloov los ntawm QSFP56 mus rau QSFP56-DD (400G QSFP-DD)
Nrog cov chaw zov me nyuam cov ntaub ntawv nthuav tawm txoj kev loj hlob sai sai, qhov kev thov ntawm cov ntaub ntawv ntim ntau yog thawb lub network kom txhawb nqa kev txhawb nqa ntau dua thiab ntau dua qhov nce siab. Qhov tseeb tshaj tawm ntawm qhov teeb meem kho qhov muag tshiab tshaj plaws yog los ntawm QSFP56 txog QSFP56-DD, uas tseem hu ua 400G QSFP-DD. DD ntawm no yog hais txog ob chav ntom ntom, sawv cev ncav cuag 400G (nrog 50G PAM4) los ntawm cov ntaub ntawv ob npaug ntawm txoj kab QSFP56, los ntawm 4 kab mus rau 8 kab.
Txawm hais tias QSFP56-DD muaj qhov nqus ob qhov loj, nws qhov loj me zoo ib yam li QSFP56. 400G QSFP56-DD chaw nres nkoj yog rov qab sib txuas nrog QSFP transceiver uas txhais tau hais tias ntev li tus tes hloov qhov txhawb nqa, QSFP56 tuaj yeem ua haujlwm ntawm QSFP56-DD chaw nres nkoj. Thaum siv QSFP56 module hauv QSFP56-DD chaw nres nkoj, qhov chaw nres nkoj no yuav raug teeb tsa rau cov ntaub ntawv ntawm 200G, tsis yog 400G.
QSFP56-DD daim ntawv foos yam tam sim no tau lees paub los ntawm 400G kev ua lag luam raws li 400G daim ntawv foos uas tau txais kev txhawj xeeb tshaj plaws. Txawm hais tias tam sim no tam sim no 400G Ethernet tau pom los ua cov kev daws teeb meem yav tom ntej rau cov ntaub ntawv chaw tom ntej, tseem muaj qhov xav tau 200G QSFP56 rau qee cov koom haum kev siv 200G Ethernet.
