Ibhizinisi lobuchwepheshe obuphezulu eligxile ocwaningweni nasekuthuthukisweni kwezokuxhumana kanye nokukhiqizwa kwefiber optical.
Ulimi
Ibhizinisi lobuchwepheshe obuphezulu eligxile ocwaningweni nasekuthuthukisweni kwezokuxhumana kanye nokukhiqizwa kwefiber optical.
Iyini i-Metro Ethernet?
I-Metro Ethernet ubuchwepheshe benethiwekhi yendawo yedolobha (MAN) obusekelwe ezindinganisweni ze-Ethernet, obuklanyelwe ukuxhumanisa amasayithi amaningi edolobheni noma esifundeni sasemadolobheni. Ihlinzeka ngesisombululo esingalinganiswa futhi esingabizi kakhulu sokuxhumanisa izindawo zebhizinisi, izikhungo zedatha, nezinye izikhungo ngaphakathi kwendawo yedolobha.
Ekuqaleni yaklanywa amanethiwekhi endawo (ama-LAN), i-Ethernet yake yaba nokufinyelela okulinganiselwe kanye nomkhawulokudonsa. Kusukela lapho yashintsha yaba yi-Carrier Ethernet, esekela ukudluliselwa kwe-bandwidth ephezulu, ibanga elide okufanelekela amanethiwekhi endawo ebanzi (ama-WAN).
I-Metro Ethernet uhlelo lokusebenza lwedolobha elikhulu lwe-Carrier Ethernet, ngokuvamile olunikeza isivinini sokudlulisa idatha esisukela ku-1 Mbps kuya ku-10 Gbps ukuze kuhlangatshezwane nezidingo ezahlukene zamabhizinisi kanye nabahlinzeki bezinsizakalo.
Isetshenziselwani i-Metro Ethernet?
Uma ungumhlinzeki wesevisi yebhizinisi noma yenethiwekhi, ungasebenzisa i-Metro Ethernet kunethiwekhi yendawo yedolobha ukuze:
Xhumanisa amahhovisi ebhizinisi lakho noma izikhungo zedatha
Xhuma amasayithi akho ebhizinisi ku-inthanethi
Nikeza i-IPTV, imihlangano yevidiyo kanye namanye amathuluzi okubambisana ngokusebenzisa i-multicasting
Xhuma amasayithi akho ebhizinisi kumasevisi efu
Nikeza uxhumano lwe-inthanethi kubabhalisile bebhizinisi noma basekhaya uma ungumhlinzeki wesevisi ye-inthanethi (i-ISP)
Nikeza izinsizakalo zokubuyisela emuva kweselula uma ungumhlinzeki weselula
Ngamanye amazwi, ungaxhumanisa wonke amasayithi akho edolobheni ku-inthanethi kanye nefu kunethiwekhi eyodwa, ekwaziyo ukulinganiswa.
Ukwakhiwa Kwenethiwekhi Ejwayelekile YeMetro
Amanethiwekhi eMetro namuhla avame ukwakhiwa kusetshenziswa enye yezindlela ezilandelayo:
I-Pure Ethernet: Izindleko eziphansi kodwa zinselele ngokuthembeka; ifanele ukusetshenziswa kwezinga elincane.
I-OTN: Isebenza kahle uma ingqalasizinda ye-OTN isivele ikhona; ukuguquguquka okulinganiselwe kokwabiwa kwe-bandwidth enamandla.
I-Ethernet phezu kwe-MPLS: Ithembekile kakhulu futhi iyakhuliswa; ivame ukusetshenziswa abahlinzeki bezinsizakalo abakhulu kodwa iyabiza.
I-Ethernet phezu kwe-DWDM: Inketho eguquguqukayo nesebenza kahle kakhulu—ukwandisa umthamo wefayibha ngenkathi kuvumela ukukhula kwensizakalo enwebekayo.
Yiziphi izinzuzo zeMetro Ethernet kumabhizinisi?
I-Metro Ethernet inikeza uhlu olukhangayo lwezinzuzo ezenzelwe izidingo zenethiwekhi yesimanje:
Isivinini esiphezulu: I-Metro Ethernet inikeza i-bandwidth ephezulu, inikeza ukuxhumana okusheshayo nokubambezeleka okuphansi.
Ukuvumelana Nezimo Kwesevisi: Inikeza ukwesekwa okuguquguqukayo kwezinhlobo eziningi zesevisi kanye nezindlela zokuhamba.
Ukuthembeka Kokusebenza: Kuqinisekisa ubuqotho benethiwekhi nge-Ethernet OAM ukuze kutholakale amaphutha, kubikwe, kanye nokuphathwa kokusebenza.
Ukusebenza Kahle Komnotho: Kunciphisa ubunzima futhi kwenza kube lula ukulungisa, okuholela ekunciphiseni izindleko zemali kanye nokusebenza uma kuqhathaniswa nama-WAN avamile.
Ukusebenza Okuqinisekisiwe: Inikeza izilawuli ze-QoS eziyinkimbinkimbi—njengokuhlukaniswa, ukuqapha, kanye nokuhlela—ukubeka phambili izinhlelo zokusebenza ezibalulekile.
Ukukhula Okulungele Ikusasa: Kusiza ukwandisa i-bandwidth ebushelelezi kusuka ku-1 Mbps kuya ku-10 Gbps, okuvumela ukwanda kwamandla aguquguqukayo, akhuphukayo ngokushintsha okuncane kwengqalasizinda.
Izinketho zokuxhumeka kwe-Metro Ethernet
I-E-LINE: Ngokuvamile ibizwa ngokuthi uxhumano lwe-Point to Point, ixhumanisa i-point “A” ne-Point “B”.
I-E-LAN: Ngokuvamile ibizwa ngokuthi uxhumano lwe-Multipoint kuya ku-Multipoint, isayithi ngalinye lixhumana nelinye ngaphandle kokudlula eHQ.
I-ETREE: Ngokuvamile ibizwa ngokuthi i-Hub and Spoke, zonke izinsizakalo kufanele zidlule e-HQ ngaphambi kokuya endaweni yokugcina.
I-MPLS Layer 3 VPN: isebenzisa imodeli yontanga ngokusebenzisa i-Border Gateway Protocol (BGP) ukusabalalisa ulwazi oluhlobene ne-VPN. Ulwazi lokuhambisa luthunyelwa kubahlinzeki bezinsizakalo.
Ukuphathwa kwezingozi okuhlakaniphile
I-Metro Ethernet ivumela ukuphathwa kwengozi okuhlakaniphile ngokusebenzisa ukwahlukanisa okunengqondo. Imisebenzi eminingi yenethiwekhi isebenza ngokuzimela ngaphakathi kweshasi eyodwa, ihlukaniswe ngokusebenza, ngokusebenza, nangokuphatha. Ngokuhlukanisa uhlelo olungokoqobo (isb., i-Broadband Network Gateway) ibe yizimo ezihlukile ezinengqondo, ukwehluleka kuyavinjelwa. Lezi zahluko zabelana ngezinsizakusebenza ezibonakalayo kuphela (ishasi, isikhala, amandla), hhayi izindiza zokulawula noma zedatha, okuvimbela izinkinga zendawo ukuthi zibangele ukungasebenzi kahle okubanzi.
Isebenza kanjani i-Metro Ethernet?
I-Metro Ethernet idala ukuxhumana kwe-metropolitan ngokuxhumanisa amaswishi nama-router phezu kwe-fiber optics, isekela kokubili izinsizakalo ze-point-to-point kanye ne-point-to-multipoint.
Ukwakhiwa Kwenethiwekhi:
Inethiwekhi Eyinhloko: Isebenzisa umzila we-backbone osheshayo, ovame ukusekelwe ku-Multi-Protocol Label Switching (MPLS), ukuqinisekisa ukuthuthwa kwedatha okusheshayo nokuthembekile kulo lonke idolobha.
Inethiwekhi Yokuhlanganisa/Ukusabalalisa: Ixhumanisa i-core nezindawo zasendaweni, ivame ukusebenzisa ubuchwepheshe bokufinyelela njenge-Passive Optical Networks (PON), i-DSL, noma izixhumanisi ezingenantambo ze-microwave.
Isendlalelo Sokufinyelela: Sihlanganisa imishini yendawo yamakhasimende (isb., amatheminali enethiwekhi ye-optical noma ama-router ebhizinisi), esebenza njengesixhumanisi sokugcina kumadivayisi abasebenzisi bokugcina.
I-topology ebonakalayo yenethiwekhi iklanyelwe ngokuguquguqukayo ukuze ifane nemodeli ethile yesevisi esetshenziswayo.
