Lub ntsiabQhov sib txawv ntawm SFP thiab SFP +yog ceev-SFP txhawb 1G, thaumSFP +txhawb 10G. Tab sis qhov kev sib tw tiag tiag yog nyob rau hauv kev nkag siab txog kev sib raug zoo ntawm cov chaw nres nkoj thiab ua kom raug cov khoom siv kho qhov muag nrog fiber ntau infrastructure.
SFP yog dab tsi
SFP stands for Small Form -factor Pluggable. Nws tau nrov nyob ib ncig ntawm 2000, feem ntau los hloov cov GBIC loj dua ntawm lub sijhawm ntawd.
Nws qhov zoo tshaj plaws yog kub -swappable muaj peev xwm thiab compact loj. Koj tuaj yeem ntxig thiab tshem tawm cov modules thaum lub cuab yeej tseem siv zog, uas yog qhov zoo dua rau kev ua haujlwm ntawm cov ntaub ntawv chaw.
SFP ceevntau yam muaj xws li:
- 100BASE-FX (100Mbps, tsis tshua pom tam sim no)
- 1000BASE-SX (multimode luv-ntau, feem ntau)
- 1000BASE-LX (ib zaug-mode long-range)
- 1000BASE-T (tooj liab chaw nres nkoj, SFP kuj muaj RJ45 tooj liab versions)
Kev siv ntau tshaj 1000BASE-SX ua piv txwv, raws li IEEE 802.3z tus qauv, nws tuaj yeem khiav 550 meters ntawmOM2 multimode fiber ntauthiab mus txog 1 km ntawm OM3. Txawm li cas los xij, hauv cov haujlwm tiag tiag, yog tias koj cov hlua khi thiab thaj chaw sib txawv ntawm qhov zoo, koj tuaj yeem ntsib cov pob ntawv poob tshaj 300 meters.
DIMI tiag -Lub Ntiaj Teb Case
Yav dhau los kuv tau ua haujlwm ntawm lub tsev kawm ntawv network qhov kev ncua deb ntawm cov tsev yog kwv yees li 400 meters, siv OM2 fiber ntau. Raws li txoj cai, 1000BASE-SX yuav tsum ua haujlwm zoo, tab sis thaum lub sijhawm sim peb pom qhov yuam kev siab ntawm qee qhov txuas. Tom qab kev tshawb nrhiav, peb pom tias cov couplers siv nyob rau hauv nruab nrab thaj vaj huam sib luag yog cov tsis zoo, nrog rau kev tso tawm ntau dhau. Qhov teeb meem tsuas yog daws tau tom qab hloov lawv nrog OM3 couplers.
Cov lus qhia tau kawm: Tsis txhob thawb kev sib kis mus rau qhov txwv siab tshaj ntawm tus qauv tus nqi - tawm yam tsawg kawg 20-30% npoo.
SFP + yog dab tsi
SFP +(Enhanced Small Form-factor Pluggable) yog ib qho kev txhim kho uas txhawb nqa txog li 10 Gbps (txog 16 Gbps hauv Fiber Channel scenarios). Nws yog siv nyob rau hauv cov ntaub ntawv chaw, neeg rau zaub mov uplinks, cia networks, video streaming backbones, thiab lwm yam scenarios yuav tsum tau high bandwidth. Nws tuav tib daim ntawv zoo li SFP (56.5mm × 13.5mm × 8.5mm) thaum nce ceev mus rau10 Gbps SFP +. Nws ua raws li SFF-8431 specification.
Feem ntauSFP + Hom:
- 10GBASE-SR: Multimode luv-ntau, 300 meters ntawm OM3, 400 meters ntawm OM4
- 10GBASE-LR: Tib-mode ntev-ntau, nominally 10 kilometers ntawm OS2 fiber
- 10GBASE-ER: Ib zaug-mode ntxiv ntev-ntau, 40 km
- 10GBASE-T: Copper tov, mus txog 100 meters nrog Cat 6A cabling
10GBASE-SR kev ua tau zoo sib txawv ntawm cov qib fiber ntau sib txawv. Yog tias koj siv cov laus OM1 / OM2 fiber ntau, qhov theoretical nrug tsuas yog 33 meters thiab 82 meters raws. Hauv kev xa tawm tiag tiag, cov fiber ntau dhau lawm uas nws tsis tuaj yeem khiav ntawm qhov nrawm.
Kev sib haum xeeb
Ntau cov ntawv online yuav qhia rau koj "SFP + vs SFP-SFP+ cov chaw nres nkoj tuaj yeem siv SFP modules," tab sis cov lus no tsuas yog ib nrab xwb. Txawm nws ua haujlwm yog nyob ntawm peb yam:
Qhov Chaw nres nkoj puas txhawb ntau- Tus Nqi (Dual- Tus Nqi)?
Feem ntau cov hloov tshiab niaj hnub 'SFP + cov chaw nres nkoj txhawb nqa 1G downgrade, tab sis tsis yog txhua tus ntawm lawv. Piv txwv li, qee qhov kev hloov pauv 10G cores thaum ntxov muaj cov khoom siv uas tsuas yog txhawb nqa 10G nrawm- ntxig rau 1G module yuav tsis lees paub txhua.
Cisco's Nexus series thiab Catalyst 9300 series SFP + cov chaw nres nkoj feem ntau txhawb nqa rov qab sib raug zoo. Txawm li cas los xij, qee qhov ntawm Huawei cov khoom siv siab - kawg (xws li cov khoom siv thaum ntxov ntawm CE12800) xav tau phau ntawv yuam kom downgrade siv cov lus txib:
Interface 10GE1/0/1speed 1000
Yog tsis muaj qhov teeb tsa no, txawm tias koj ntxig 1G module, qhov chaw nres nkoj yuav nyob qis.
Puas yog Cov Txheej Txheem thiab Wavelengths sib phim?
Piv txwv li, noj 10GBASE-LR ib zaug-mode module (1310nm wavelength) thiab txo qis nws kom khiav 1000BASE-LX (kuj 1310nm) yuav tsum ua haujlwm zoo. Tab sis yog tias koj sim txuas 10GBASE-ER (1550nm) mus rau 1000BASE-SX (850nm) ntaus ntawv, lawv yuav tsis sib xws.
Tus neeg muag khoom-Kev txwv tshwj xeeb
Ntau tus neeg muag khoom hlawv cov lej cim rau hauv cov qauv, cov khoom siv twg yuav kuaj xyuas. Cisco, Huawei, thiab H3C txhua tus muaj cov txheej txheem zoo li no. Yog tias koj yuav thib peb -party modules tau tshaj, tej zaum koj yuav tau qhia rau tus neeg muag khoom ua ntej "lub cuab yeej twg nws yuav raug siv rau" yog li lawv tuaj yeem hlawv cov cai raug.
Tsis muaj Reverse Compatibility
Inserting SFP module rau hauv SFP + chaw nres nkoj yog ua tau. Tab sis inserting ibSFP + module rau hauv SFP chaw nres nkojyuav tsis ua haujlwm.
Cov qub SFP cov chaw nres nkoj 'PHY chips tsuas yog txhawb nqa txog 1.25 Gbps (raws li Gigabit Ethernet), thiab cov txheej txheem lub cev tsis txhawb 10G cov cim. Txawm hais tias koj yuam nws hauv, lub cuab yeej yuav tsis paub nws lossis tsuas yog qhia qhov yuam kev.
Kev siv hluav taws xob thiab cua sov dissipation
SFP modules feem ntau haus ntawm 0.5-1W. Piv txwv li, Cisco GLC-SX-MMD (1000BASE-SX) muaj lub zog siv tau ntawm 0.8W.
SFP +, vim muaj kev nrawm dua, feem ntau siv 1-1.5W. Cisco's SFP-10G-SR yog nyob ib puag ncig 1.3W, thaum 10GBASE-LR tseem siab dua ntawm 1.5W.
Ntawm no yog ib qho piv txwv: A 48-chaw nres nkoj SFP + hloov, yog tias txhua qhov chaw nres nkoj muaj cov neeg nyob nrog 10G modules, yuav haus 48 × 1.3W=62.4W rau qhov kho qhov muag modules. Qhov no tsis suav nrog kev siv hluav taws xob ntawm cov nti hloov pauv, kiv cua, thiab lwm yam khoom siv.
Qhov tseem ceeb tshaj, muaj cua sov dissipation . 10G modules ua kom muaj cua sov loj. Yog hais tias lub txee qhov cua tsis zoo thiab qhov ntsuas kub siab tshaj 70 degree, nws yuav ua rau muaj kev tiv thaiv kub dhau, cia li nqa qhov txuas mus. Yog li thaum xa high -density 10G ports, koj yuav tsum:
Xyuas kom lub hauv ntej thiab nram qab lub txee tso pa tawm (tsawg kawg 15cm pem hauv ntej, 20cm rear)
Tshawb xyuas kev ua haujlwm kiv cua
Yog tias ua tau, teeb tsa lub txee sab saum toj tso cov kiv cua
Kis ceev
SFP modulestxhawb nqa cov ntaub ntawv kis tus nqi mus txog 1 Gbps, zoo kawg nkaus haum rau cov qauv chaw ua haujlwm tes hauj lwm lossis cov ntawv thov nrog cov kev xav tau ceev.SFP + modules, ntawm qhov tod tes, muab tus nqi sib kis mus txog 10 Gbps, ua rau lawv zoo tagnrho rau kev siv siab - ceev xws li video streaming, backup cov ntaub ntawv, thiab cov ntaub ntawv loj.
SFP tuaj yeem tswj hwm cov haujlwm hauv network tau zoo, thaumSFP+ ua kom muaj kev ua haujlwm zoo ntawm cov ntaub ntawv - cov ntawv thov siv zog. Qhov kev sib txawv no tseem ceeb tshwj xeeb tshaj yog rau cov lag luam uas tab tom nrhiav rau yav tom ntej - pov thawj lawv cov kev nthuav dav network.
Txawm li cas los xij, ib leeg - hom fiber ntau kuj muaj cov ntsiab lus kom nco ntsoov ntev - kis tau tus mob: dispersion them nyiaj. Kev sib txuas siab tshaj 40 mais (xws li 10GBASE-ER/ZR) yuav xav tau ntxiv DCF (Dispersion Compensation Fiber) los yog kho cov module qhov tsis sib xws.
Daim ntawv thov Scenario sib piv
SFP
Nkag mus rau txheej txheej keyboards: Cov tsev ua haujlwm, tsev kawm ntawv hauv tsev kawm ntawv nkag tau hauv tsev -1G bandwidth txaus thiab raug nqi
Kev soj ntsuam systems: Kev siv lub koob yees duab, NVR cascading-1G yog txaus rau 4K video ntws
Industrial tswj tes hauj lwm: Lub Hoobkas hauv pem teb PLCs, kev sib txuas lus neeg hlau - kev ruaj ntseg yog qhov tseem ceeb tshaj qhov bandwidth
Cov cuab yeej cuab tam cuab tam expansion: Qee cov khoom siv los ntawm 10 xyoo dhau los tsuas muaj SFP chaw nres nkoj
SFP +
Cov chaw zov me nyuam: Server uplinks, storage networks, virtualization clusters-10G yog lub hauv paus kev teeb tsa
Core hloov: Enterprise network core layer, aggregation layer uplinks-cov tsheb loj
HD video production: 4K / 8K tsis yog - cov kab teeb tsa kho kom raug, IP hloov pauv - xav tau ntau bandwidth
5G thauj network: Base chaw nres tsheb backhaul- ib qho chaw nres tsheb 5G hauv paus tuaj yeem muaj tsheb khiav mus txog 10Gbps
Tswv yim: Ntau thiab ntau lub chaw cov ntaub ntawv tam sim no tau siv 25G SFP28, txawm tias 100G QSFP28. 10G SFP+ yog maj mam hloov ntawm "core" mus rau "ntug." Txawm li cas los xij, rau feem ntau cov lag luam me thiab nruab nrab, 10G tseem yog tus nqi tshaj plaws -kev xaiv zoo.
FAQ
Kuv qhov thib peb -party module tsis raug lees paub los ntawm lub cuab yeej-Kuv yuav ua li cas?
Paub meej peb yam:
Puas yog tus qauv qauv sib phim (SR rau SR, LR rau LR)?
Puas yog lub wavelength thiab raws tu qauv sib haum?
Puas yog nws xav tau cov cuab yeej tsim khoom lag luam tus lej cim hluav taws kub?
Vim li cas qhov txuas ua haujlwm tsis tu ncua?
90% ntawm lub sijhawm, nws yog qhov teeb meem fiber ntau lossis thaj qaum:
Ntxuav lub ntsej muag kawg: Siv cov cwj mem ntxuav tshwj xeeb, tsis yog cawv cawv
Kuaj khoov: Fiber khoov vojvoog tsis tuaj yeem tsawg dua 30mm
Ntsuas lub hwj chim kho qhov muag: Khiav qhov kev sim OTDR kom pom cov ntu twg muaj qhov txawv txav tsis zoo
Yog tias koj tau txiav txim siab txog cov teeb meem fiber ntau, tshawb xyuas qhov ntsuas kub, cov kiv cua ntaus ntawv, lossis txawm tias qhov chaw nruab nrab ntawm qhov ntsuas kub.
Puas tuaj yeem SFP + downgrade rau 100M?
Theoretically yog, tab sis tsawg heev pab kiag li lawm txhawb nws. Feem ntau SFP + cov chaw nres nkoj tsuas yog txhawb nqa dual - tus nqi 10G thiab 1G, tsis yog 100M. Yog tias koj muaj 100M qhov kev xav tau tiag tiag, nws raug pom zoo kom siv SFP chaw nres nkoj lossis tooj liab chaw nres nkoj.
Optical modules kav ntev npaum li cas?
Qhov no txawv heev. Siab- cov qauv qub zoo tuaj yeem ua haujlwm rau 5-7 xyoo yam tsis muaj teeb meem. Peb tau pom Huawei SFP modules tau teeb tsa hauv 2012 uas tseem tab tom ua haujlwm niaj hnub no. Tab sis rau peb-tog modules, nws tsis meej.
