I-MICROCHIP AN1286 Ethernet yoKhuseleko lweRingi yoKhuseleko lweSikhokelo soLungiselelo loMsebenzisi
Intshayelelo
Olu xwebhu luchaza indlela yokuseta iimpawu ze-Ethernet Ring Protection Switching (ERPS). I-Ethernet Ring Protection Switching ichazwa ngumgangatho we-ITU G.8032.
Oku kuphunyezwa kuhambelana ne-ITUT-G.8032 (V1) kunye ne-ITUT-G.8032 (V2).
Umgangatho we-ITU G.8032 uchaza iprotocol yokutshintshwa kokhuseleko oluzenzekelayo (APS) kunye neendlela zokukhusela zokutshintshwa kwe-Ethernet network layer (ETH) i-ring topologies. Iprotocol yokukhusela echazwe kwi-ITU G.8032 yenza ukuba i-pointto point ekhuselweyo, i-point-to-multipoint kunye ne-multipoint-to-multipoint uqhagamshelwano ngaphakathi kwendandatho okanye iindandatho ezidibeneyo, ezibizwa ngokuba yi-topology "multi-ring / ladder network". Iringi ye-ETH imephu yesakhelo sesangqa somzimba.
I-Ethernet ring node nganye idityaniswe kwiindawo ezikufutshane ze-Ethernet ring nodes ezithatha inxaxheba kwindandatho ye-Ethernet efanayo, usebenzisa amakhonkco amabini azimeleyo. Ikhonkco lomsesane libotshelelwe ngamakhonkco amabini akufutshane e-Ethernet kunye ne-port yekhonkco lekhonkco libizwa ngokuba yi-ring port. Inani elincinci le-Ethernet ring nodes kwi-Ethernet ring zimbini.
Ukuphepha i-Loop kwiringi ye-Ethernet kufezekiswa ngokuqinisekisa ukuba, nangaliphi na ixesha, i-traffic inokuhamba kuzo zonke ngaphandle kwelinye lamakhonkco eringi. Eli khonkco lithile libizwa ngokuba yikhonkco lokukhusela i-ring (RPL) kwaye phantsi kweemeko eziqhelekileyo le khonkco yekhonkco ivaliwe, oko kukuthi, ayisetyenziselwa ukuthuthwa kwenkonzo. Enye ekhethiweyo ye-Ethernet ring node, i-node yomnini we-RPL, inoxanduva lokuthintela i-traffic kwelinye icala le-RPL. Ngaphantsi kwemeko yokungaphumeleli kwe-Ethernet, i-node yomnini we-RPL inoxanduva lokuvula ukuphela kwayo kwe-RPL, ngaphandle kokuba i-RPL ayiphumelelanga, ivumela i-RPL ukuba isetyenziswe kwi-traffic. Enye i-Ethernet ring node esecaleni kwe-RPL, i-RPL node engummelwane, inokuthatha inxaxheba ekuthinteleni okanye ekuvuleni ukuphela kwayo kwe-RPL.
Ezi meko zilandelayo zeringi ye-Ethernet ziyaxhaswa:
- Ukungaphumeleli kweSiginali (SF) - Xa imeko ye-SF ifunyenwe kwikhonkco lekhonkco kwaye izimisele "ukuzinza" ukungaphumeleli, i-Ethernet ring nodes ezikufutshane nekhonkco engaphumeleliyo iqala ukutshintshwa kwendlela yokukhusela.
- Akukho sicelo (NR) - Imeko xa kungekho zicelo zokutshintsha ukhuseleko lwendawo ziyasebenza. Le miyalelo ilandelayo yolawulo iyaxhaswa:
- Ukutshintshela ngokunyanzeliswa (FS) – Lo myalelo unyanzelisa ibhloko kwizibuko leringi apho kukhutshwa khona umyalelo.
- Ukutshintsha kwe-Manual (MS) - Ngokungabikho kokungaphumeleli okanye i-FS, lo myalelo unyanzelisa ibhloko kwi-port ring apho umyalelo ukhutshwa khona.
- Sula - Umyalelo ocacileyo, kwi-Ethernet ring node, isetyenziselwa le misebenzi ilandelayo.
- Ukucima umyalelo wolawulo wengingqi osebenzayo (umz., FS okanye MS).
- Ukuqalisa ukuguqulwa ngaphambi kokuba ukulinda ukubuyisela (WTR) okanye ukulinda ukuvala (i-WTB) ixesha lokuphelelwa yisikhathi kwimeko yokusebenza kokubuyisela.
- Ukuqalisa ukuguqulwa kwimeko yokusebenza okungabuyiyo.
Ukutshintshela umva kunye nokungabuyi mva.
- Kwinkqubo yokubuyisela umva, emva kokuba imeko (s) ebangela ukuba utshintsho luye lwacinywa, umjelo wezothutho ubuyiselwa kwiqumrhu elisebenzayo lezothutho, oko kukuthi, livaliwe kwi-RPL.
Ukuba isiphene sisusiwe, umjelo wezithuthi ubuyela emva kokuphelelwa kwexesha le-WTR timer, esetyenziselwa ukuphepha ukuguqula iindawo zokukhusela kwimeko yeziphene eziphazamisayo. - Ekusebenzeni okungabuyiyo, umjelo wezithuthi uyaqhubeka nokusebenzisa i-RPL, ukuba ayiphumelelanga, emva kokuba imeko yokutshintsha isusiwe.
Ukutshintshwa kokhuseleko kuya kwenziwa xa:
- I-SF ibhengezwe kwelinye lamakhonkco eringi kwaye imeko ye-SF efunyenweyo inokubaluleka okuphezulu kunaso nasiphi na esinye isicelo sendawo okanye isicelo esikude.
- umyalezo ofunyenweyo we-R-APS ucela ukuba utshintshe kwaye unokubaluleka okuphezulu kunaso nasiphi na esinye isicelo sendawo
- eqalwe lulawulo lwabaqhubi (umz., FS, MS) ukuba inokubaluleka okuphezulu kunaso nasiphi na esinye isicelo sendawo okanye isicelo esikude.
IiProtokholi ze-ERPS
Ulwazi lwe-ERPS luqhutywa ngaphakathi kwe-R-APS PDU eyenye yeesuite ze-Ethernet OAM PDUs. Iifomathi ze-OAM PDU zohlobo ngalunye lwe-Ethernet OAM yokusebenza zichazwe kwi-ITU-T Rec. Y.1731.
Uqwalaselo
Kwimeko eqhelekileyo, uqwalaselo ERPS kufuna CFM MEP iimeko ukuba instantiated kuzo zombini iziphelo flow ekhuselweyo. Nangona kunjalo, ukuba iinodi zeringi ziqhagamshelwe ngasemva ukuya ngasemva, oko kukuthi, ngaphandle kokudlula enye inethiwekhi yokutshintsha, unokuthembela kwikhonkco lomzimba ngokuthe ngqo ngaphandle kokusebenzisa i-CFM MEP yophawu lokusilela. Xa kunjalo sebenzisa "ikhonkco le-sf-trigger".
UmdalaampLe yoqwalaselo lwe ERPS iboniswe ngezantsi, kunye noqwalaselo olunxulumeneyo lweCFM:
Uqwalaselo lweeparamitha
Isivakalisi somyalelo woqwalaselo lwenqanaba lehlabathi le-ERPS ngulo:
Apho:
Isivakalisi senqanaba le-ERPS lomyalelo woqwalaselo lwe-CLI ngulo:
Apho:
Umdalaample iboniswe ngezantsi:
Ukusebenzisa imiyalelo yolawulo
Isivakalisi senqanaba le-ERPS lomyalelo we-CLI ngulo:
Apho:
Example:
Bonisa isimo kunye namanani
Isivakalisi somyalelo we-erps CLI ngulo:
Apho:
Exampbonisa izibalo:
Exampbonisa isimo:
Qwalasela umsesane wokutshintsha ezintathu example
Uthungelwano olulula lokutshintsha ezintathu lwakhiwe ukubonisa indlela iimpawu ze-ERPS ezinokuthi ziqwalaselwe ngayo. Inethiwekhi iboniswe ngezantsi.
Le miyalelo ilandelayo iya kuvala i-STP kunye ne-LLDP, yenza i-C-Port kwi-Port 1 kunye no-2 kuzo zonke ezi-3 zokutshintsha.
Iiswitshi ezi-3 zomntu ngamnye ziqwalaselwe ngolu hlobo:
Qwalasela iCFM kunye ne-ERPS kwiTshintsho 1
Qwalasela iCFM kunye ne-ERPS kwiTshintsho 2
Qwalasela iCFM kunye ne-ERPS kwiTshintsho 3
Amaxwebhu / Izibonelelo
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I-MICROCHIP AN1286 i-Ethernet yoKhuseleko lweRingi yoLungiselelo loTshintsho [pdf] Isikhokelo somsebenzisi I-AN1286, AN1286 Ethernet Ring yoKhuseleko loLungiselelo lokuTshintsha, uLungiselelo loKhuseleko lwe-Ethernet Ring, uLungiselelo loKhuseleko lweRingi, uLungiselelo loTshintsho loKhuselo. |
