25G Ethernet tuaj yeem ua rau qhov tsis txaus bandwidth ntawm 10G Ethernet thiab tus nqi siab ntawm 40G Ethernet.
Zuag qhia tag nrho, nws muaj cov zoo li nram no. 25G SerDes muaj tsawg dua kev xaib, txuag cov khoom siv fiber ntau SerDes yog cov lus luv ntawm serializer thiab deserializer.
Nws yog lub hauv paus ntsiab lus lub sij hawm multiplexing, taw tes rau-point serial thev naus laus zis. Ntau lub voj voos uas muaj kev sib txig sib txig sib txig hloov mus ua kev sib tw ntawm qhov hluav taws xob kawg ntawm qhov kawg, thiab lub siab ceev ntawm qhov tau txais kawg Lub teeb liab raug hloov mus rau hauv lub cim hluav taws xob tsawg.
Tam sim no, tus nqi ntawm SerDes tuaj yeem ncav cuag 25Gbps, yog li tsuas yog ib qho 25Gbps SerDes channel yog xav tau los ua tiav 25G kev sib txuas, thaum 40G kev twb kev txuas xav tau 4 10Gbps SerDes raws kom tau. Qhov sib txuas ntawm ob 40G yuav muaj 4 khub ntawm cov fibers, uas siv cov khoom siv Fiber. 25G network daim npav yog siv rau PCle channel siv tus nqi siab dua Tam sim no, lub ntsiab hluav taws xob Intel Xeon CPU tsuas muab 40 raws ntawm PCle (PCle 3.0), nrog cov xaib channel bandwidth ntawm txog 8Gbps.
Cov channel no tsis yog siv rau kev sib txuas lus nkaus xwb ntawm CPU thiab daim npav network, tab sis kuj siv rau RAID phaib, GPU phaib thiab tag nrho lwm yam khoom siv. Rau kev sib txuas lus ntawm daim npav, nws yog qhov tsim nyog los txhim kho kev siv ntawm lub network card mus rau qhov txwv PCle channel.
Ib daim 40G network daim npav yuav tsum muaj tsawg kawg yog PCle 3.0 * 8 channel, tom qab ntawd cov channel bandwidth tiag tiag siv rau ob hnub kawg khiav tib lub sijhawm yog 40G * 2 / (8G * 16)=62.5%, thiab 25G daim npav network tsuas xav tau ib qho PCle * 8 channel, tom qab ntawd tus nqi siv Nws yog 25 * 2 / (8G * 8)=78%.
Pom tseeb nyob rau hauv cov nqe lus ntawm PCle channel, 25G ua tau zoo dua thiab yoog raws li 40G. 25G network cabling tus nqi tsawg Tus 40G network siv QSFP + optical modules thiab MTP / MPO fiber ntau cov khoom siv tau los txuas, thiab cov qauv hluav taws xob no tsis sib haum nrog 10G tes hauj lwm.
Yog tias koj hloov kho los ntawm 10G txog 40G, koj yuav tsum tau rov txuas cov xov tooj, uas yog tus nqi kim thiab cov khoom siv pov tseg. Hauv kev sib piv, SFP28 optical module siv nyob rau hauv 25G network tuaj yeem ua haujlwm nrog LC jumper ntawm 10G network. Yog tias koj hloov kho los ntawm 10G rau 25G, koj tuaj yeem zam txoj haujlwm tsis txuas ntawm cov xov hluav taws xob, uas txuag lub sijhawm thiab nyiaj txiag. 25G' s zoo rau hloov I / O (kev tawm tswv yim thiab tawm) Ua ntej, 25G Ethernet muaj kev hloov zoo I / O kev ua tau zoo thiab cov peev txheej tsim. Nws tus nqi yog 2.5 lub sij hawm uas ntawm 10G, uas tuaj yeem nce hloov chaw nres nkoj ntom ntuag thiab kho kom zoo dua qub.
Thib ob, piv nrog 40G, nws txo cov keyboards, cov khoom siv fais fab, kev kub lub zog, thiab xaim. Tus naj npawb ntawm cov cuab yeej tuaj yeem txo cov kev siv nyiaj thiab kev siv nyiaj kev lag luam; ntxiv rau, 25G tus qauv yog tsim los ntawm 100G tus qauv, thiab 100G tuaj yeem pom tau los ntawm 4 25Gbps channel, txo tus nqi hloov.
