Ngenxa yokuba ii-LAN switches zisebenzisa i-virtual circuit switching, zinokuqinisekisa ngobuchwephesha ukuba i-bandwidth phakathi kwazo zonke ii-input kunye nee-output ports ayinangxabano, nto leyo evumela ukuhanjiswa kwedatha ngesantya esiphezulu phakathi kwee-ports ngaphandle kokudala imiqobo yokudluliselwa. Oku kwandisa kakhulu ukudluliselwa kwedatha kwiindawo zolwazi lwenethiwekhi kwaye kuphucula inkqubo yenethiwekhi iyonke. Eli nqaku lichaza ubuchwepheshe obuhlanu obuphambili obubandakanyekayo.
1. I-ASIC eCwangcisiweyo (Isekethe eDibeneyo eKhethekileyo kwiSicelo)
Le yitshiphu yesekethe edibeneyo eyenzelwe ngokukodwa ukuphucula utshintsho lweLayer-2. Yiteknoloji yokudibanisa ephambili esetyenziswa kwizisombululo zothungelwano lwanamhlanje. Imisebenzi emininzi inokudityaniswa kwitshiphu enye, inika iingenelo ezinje ngoyilo olulula, ukuthembeka okuphezulu, ukusetyenziswa kwamandla aphantsi, ukusebenza okuphezulu, kunye neendleko eziphantsi. Iitshiphu ze-ASIC ezicwangcisiweyo ezisetyenziswa kakhulu kwiiswitshi ze-LAN zinokwenziwa ngokwezifiso ngabavelisi—okanye ngabasebenzisi—ukuze zihlangabezane neemfuno zesicelo. Ziye zaba zezinye zezona teknoloji ziphambili kwizicelo zeswitshi ze-LAN.
2. Umbhobho osasazekileyo
Ngokusebenzisa imibhobho esasazwayo, iinjini ezininzi zokudlulisela phambili ezisasazwayo zinokuthumela ngokukhawuleza nangokuzimeleyo iipakethi zazo. Kwipayipi enye, iitships ezininzi ze-ASIC zinokucubungula iifreyimu ezininzi ngaxeshanye. Oku kuvumelana kunye nokuhambisa imibhobho kuphakamisa ukusebenza kokudlulisela kwinqanaba elitsha, kufezekisa ukusebenza kwesantya somgca kwi-unicast, ukusasazwa, kunye nethrafikhi ye-multicast kuzo zonke iizibuko. Ke ngoko, ukuhambisa imibhobho esasazwayo yinto ebalulekileyo ekuphuculeni isantya sokutshintsha kwe-LAN.
3. Inkumbulo Ekwaziyo Ukukhula Ngokutshintshatshintshayo
Kwiimveliso zokutshintsha i-LAN eziphambili, ukusebenza okuphezulu kunye nokusebenza okusemgangathweni kudla ngokuxhomekeka kwinkqubo yememori ekrelekrele. Itekhnoloji yememori ekhula ngokukhawuleza ivumela iswitshi ukuba yandise umthamo wememori ngokungxama ngokweemfuno zethrafikhi. Kwiiswitshi zeLayer-3, inxalenye yememori inxulunyaniswa ngokuthe ngqo nenjini yokudlulisa, okuvumela ukongezwa kweemodyuli ezininzi zojongano. Njengoko inani leenjini zokudlulisa lisanda, imemori ehambelanayo iyanda ngokufanelekileyo. Ngokusebenzisa i-ASIC processing esekelwe kwipayipi, ii-buffers zinokwakhiwa ngokuguquguqukayo ukwandisa ukusetyenziswa kwememori kunye nokuthintela ukulahleka kwepakethi ngexesha lokuqhuma okukhulu kwedatha.
4. Iindlela zoMgca oPhambili
Nokuba isixhobo senethiwekhi sinamandla kangakanani na, siya kuhlala sixinene kwiindawo zenethiwekhi ezixhunyiweyo. Ngokwesiko, ithrafikhi kwizibuko igcinwa kumgca omnye wokuphuma, icutshungulwa ngokungqongqo ngolandelelwano lwe-FIFO nokuba kubaluleke kangakanani na. Xa umgca ugcwele, iipakethi ezingaphezulu ziyawa; xa umgca ukhula, ukulibaziseka kuyanda. Le ndlela yendabuko yokufaka umgca idala ubunzima kwizicelo zexesha langempela neze-multimedia.
Ngenxa yoko, abathengisi abaninzi baye baphuhlisa ubuchwepheshe obuphambili bokufaka imigca ukuxhasa iinkonzo ezahlukeneyo kwiinxalenye ze-Ethernet, ngelixa belawula ukulibaziseka kunye nokuxhathisa. Oku kunokuquka amanqanaba amaninzi emigca ngezibuko ngalinye, okuvumela ukwahlula okungcono kwamanqanaba ethrafikhi. Iipakethi zedatha ze-multimedia kunye nexesha langempela zibekwe kwimigca ephambili, kwaye ngokufaka imigca ngokulinganayo, le migca icutshungulwa rhoqo—ngaphandle kokungayinaki ngokupheleleyo ithrafikhi ephantsi. Abasebenzisi bezicelo zemveli abaqapheli utshintsho kwixesha lokuphendula okanye ukudlula, ngelixa abasebenzisi abasebenzisa izicelo ezibalulekileyo ngexesha befumana iimpendulo ngexesha elifanelekileyo.
5. Uhlu lweTrafikhi oluZenzekelayo
Kwindlela yokudlulisa idatha kwinethiwekhi, ezinye iindlela zokuhamba kwedatha zibaluleke ngakumbi kunezinye. Iiswitshi zeLayer-3 LAN ziqalile ukusebenzisa iteknoloji yokwahlulahlula ithrafikhi ngokuzenzekelayo ukwahlula phakathi kweentlobo ezahlukeneyo kunye nezinto eziphambili zethrafikhi. Ukuziqhelanisa kubonisa ukuba ngokwahlulahlula ngokuzenzekelayo, iiswitshi zinokuyalela umbhobho wokucubungula iipakethi ukuba wahlule ukuhamba okuchongiwe ngumsebenzisi, ukufezekisa ukubambezeleka okuphantsi kunye nokudluliselwa phambili okuphambili. Oku akuboneleli nje kuphela ngolawulo olusebenzayo kunye nolawulo lweendlela ezikhethekileyo, kodwa kunceda nokuthintela ukuxinana kwenethiwekhi.
Ixesha lokuthumela: Novemba-20-2025