Lero tipitiriza kuphunzira gawo la 2.6 la maphunziro a ICND2 ndikuyang'ana pakukonzekera ndi kuyesa protocol ya EIGRP. Kukhazikitsa EIGRP ndikosavuta. Monga momwe zilili ndi njira ina iliyonse yolowera monga RIP kapena OSPF, mumalowetsa masinthidwe apadziko lonse a rauta ndikulowetsa rauta eigrp <#> lamulo, pomwe # ndi nambala ya AS.
Nambala iyi iyenera kukhala yofanana pazida zonse, mwachitsanzo, ngati muli ndi ma routers 5 ndipo onse amagwiritsa ntchito EIGRP, ndiye kuti ayenera kukhala ndi nambala yofanana yodziyimira yokha. Mu OSPF iyi ndi ID ya Njira, kapena nambala ya ndondomeko, ndipo mu EIGRP ndi nambala yodziyimira yokha.
Mu OSPF, kukhazikitsa moyandikana, ndi Njira ID a routers osiyana mwina sizingafanane. Mu EIGRP, chiwerengero cha AS cha oyandikana nawo onse chiyenera kufanana, mwinamwake malo oyandikana nawo sangakhazikitsidwe. Pali njira ziwiri zothandizira protocol ya EIGRP - osatchula chigoba chobwerera kumbuyo kapena kutchula chigoba chakutchire.
Poyamba, lamulo la netiweki limatchula adilesi ya IP yamtundu wa 10.0.0.0. Izi zikutanthauza kuti mawonekedwe aliwonse omwe ali ndi octet yoyamba ya IP adilesi 10 adzatenga nawo gawo pamayendedwe a EIGRP, ndiye kuti, pakadali pano, ma adilesi onse a kalasi A a network 10.0.0.0 amagwiritsidwa ntchito. Ngakhale mutalowetsa subnet yeniyeni ngati 10.1.1.10 osatchula chigoba chotsitsimutsa, ndondomekoyi idzasinthirabe ku adilesi ya IP monga 10.0.0.0. Choncho, kumbukirani kuti dongosololi lidzavomereza adiresi ya subnet yomwe yatchulidwa, koma idzawona kuti ndi adiresi yapamwamba ndipo idzagwira ntchito ndi gulu lonse la kalasi A, B kapena C, malingana ndi mtengo wa octet woyamba. adilesi ya IP.
Ngati mukufuna kuyendetsa EIGRP pa subnet 10.1.12.0/24, muyenera kugwiritsa ntchito lamulo ndi chigoba chobwerera cha mawonekedwe a netiweki 10.1.12.0 0.0.0.255. Chifukwa chake, EIGRP imagwira ntchito ndi maukonde olankhulirana odziwika bwino popanda chigoba, ndipo ndi ma subnets opanda kalasi, kugwiritsa ntchito chigoba cha wildcard ndikoyenera.
Tiyeni tipitirire ku Packet Tracer ndikugwiritsa ntchito netiweki topology kuchokera pamaphunziro am'mbuyomu amakanema, omwe tidaphunzira nawo za FD ndi RD.
Tiyeni tiyike netiweki iyi mu pulogalamuyi ndikuwona momwe imagwirira ntchito. Tili ndi ma routers 5 R1-R5. Ngakhale Packet Tracer imagwiritsa ntchito ma routers okhala ndi mawonekedwe a GigabitEthernet, ndidasintha pamanja bandwidth ndi latency kuti zigwirizane ndi topology yomwe takambirana kale. M'malo mwa netiweki ya 10.1.1.0/24, ndidalumikiza mawonekedwe a loopback ku rauta ya R5, komwe ndidapereka adilesi 10.1.1.1/32.
Tiyeni tiyambe ndikukhazikitsa rauta ya R1. Sindinatsegule EIGRP pano, koma ndangopereka adilesi ya IP ku rauta. Ndi lamulo la config t, ndikulowetsa dongosolo la kasinthidwe padziko lonse ndikuyambitsa ndondomekoyi polemba lamulo la router eigrp <autonomous system number>, yomwe iyenera kukhala pakati pa 1 mpaka 65535. Ndimasankha nambala 1 ndikusindikiza Enter. Komanso, monga ndanenera, mungagwiritse ntchito njira ziwiri.
Nditha kulemba netiweki ndi adilesi ya IP ya netiweki. Maukonde 1/10.1.12.0, 24/10.1.13.0 ndi 24/10.1.14.0 olumikizidwa ku rauta R24. Onse ali pa "khumi" network, kotero ine ndikhoza kugwiritsa ntchito lamulo limodzi, network 10.0.0.0. Ngati ndikanikiza Enter, EIGRP ikhala ikugwira ntchito pamitundu yonse itatu. Ndikhoza kuyang'ana izi polowetsa lamulo do show ip eigrp interfaces. Tikuwona kuti protocol ikuyenda pa 2 GigabitEthernet interfaces ndi mawonekedwe amodzi a Serial omwe R4 rauta imalumikizidwa.
Ngati ndiyendetsa do show ip eigrp interfaces lamulanso kuti ndiyang'ane, nditha kutsimikizira kuti EIGRP ikuyendadi pamadoko onse.
Tiyeni tipite ku router R2 ndikuyamba protocol pogwiritsa ntchito malamulo a config t ndi router eigrp 1. Nthawi ino sitidzagwiritsa ntchito lamulo pa intaneti yonse, koma tidzagwiritsa ntchito mask reverse. Kuti muchite izi, ndikulowetsa maukonde olamulira 10.1.12.0 0.0.0.255. Kuti muwone zosintha, gwiritsani ntchito do show ip eigrp interfaces lamulo. Tikuwona kuti EIGRP ikungogwiritsa ntchito mawonekedwe a Gig0 / 0, chifukwa mawonekedwewa okhawo amafanana ndi magawo a lamulo lolowa.
Pachifukwa ichi, chigoba chotsalira chimatanthauza kuti mawonekedwe a EIGRP adzagwira ntchito pa intaneti iliyonse yomwe octets atatu oyambirira a IP adilesi ndi 10.1.12. Ngati maukonde omwe ali ndi magawo omwewo alumikizidwa ndi mawonekedwe ena, ndiye kuti mawonekedwewa adzawonjezedwa pamndandanda wamadoko omwe protocol iyi ikuyenda.
Tiyeni tiwonjeze maukonde ena ndi network network 10.1.25.0 0.0.0.255 ndikuwona momwe mndandanda wamalo olumikizirana omwe amathandizira EIGRP udzawonekera. Monga mukuwonera, tsopano tawonjezera mawonekedwe a Gig0/1. Chonde dziwani kuti mawonekedwe a Gig0/0 ali ndi mnzake m'modzi, kapena mnansi m'modzi - rauta R1, yomwe tapanga kale. Pambuyo pake ndikuwonetsani malamulo otsimikizira zoikamo, pakadali pano tipitiliza kukonza EIGRP pazida zotsalira. Titha kugwiritsa ntchito kapena osagwiritsa ntchito chigoba chakumbuyo pokonza ma routers.
Ndimapita ku CLI console ya rauta ya R3 ndikusintha masinthidwe apadziko lonse ndikulemba malamulo rauta eigrp 1 ndi network 10.0.0.0, kenako ndimapita ku zoikamo za rauta ya R4 ndikulemba malamulo omwewo osagwiritsa ntchito chigoba chobwerera.
Mukhoza kuona momwe EIGRP ndi yosavuta sintha kuposa OSPF - mu nkhani yomaliza muyenera kulabadira ABRs, madera, kudziwa malo awo, etc. Palibe chomwe chikufunika apa - ndimangopita ku zoikamo zapadziko lonse lapansi za rauta ya R5, lembani maulamuliro rauta eigrp 1 ndi netiweki 10.0.0.0, ndipo tsopano EIGRP ikugwira ntchito pazida zonse zisanu.
Tiyeni tione zimene tinakambirana muvidiyo yapitayi. Ndimalowa m'makonzedwe a R2 ndikulemba njira yowonetsera ip, ndipo dongosolo limasonyeza zofunikira.
Tiyeni tiyang'ane pa rauta ya R5, kapena kani, ku netiweki ya 10.1.1.0/24. Uwu ndiye mzere woyamba patebulo lamayendedwe. Nambala yoyamba m'mabulaketi ndi mtunda wotsogolera, wofanana ndi 90 pa protocol ya EIGRP. Chilembo cha D chimatanthauza kuti njira iyi imaperekedwa ndi EIGRP, ndipo nambala yachiwiri m'makolo, yofanana ndi 26112, ndi njira ya R2-R5. Ngati tibwereranso ku chithunzi cham'mbuyomu, titha kuwona kuti mtengo wa metric pano ndi 28416, kotero ndiyenera kuyang'ana chomwe chimayambitsa kusiyana uku.
Lembani mawonekedwe a chiwonetsero cha loopback 0 lamulo muzokonda za R5. Chifukwa chake ndi chakuti tinagwiritsa ntchito mawonekedwe a loopback: ngati muyang'ana kuchedwa kwa R5 pa chithunzicho, ndi chofanana ndi 10 ΞΌs, ndipo muzokonda za router timapatsidwa chidziwitso kuti kuchedwa kwa DLY ndi 5000 microseconds. Tiyeni tiwone ngati ndingasinthe mtengo uwu. Ndimalowa mu R5 global kasinthidwe mode ndi kulemba mawonekedwe loopback 0 ndi kuchedwa malamulo. Dongosololi limapangitsa kuti mtengo wochedwetsa ugawidwe kuchokera ku 1 mpaka 16777215, komanso makumi a ma microseconds. Popeza mu khumi mtengo wochedwa wa 10 ΞΌs umagwirizana ndi 1, ndikulowetsa lamulo lochedwa 1. Timayang'ananso mawonekedwe a mawonekedwe ndikuwona kuti dongosololi silinavomereze mtengo uwu, ndipo silikufuna kuchita izi ngakhale pokonzanso maukonde. magawo mu zoikamo R2.
Komabe, ndikukutsimikizirani kuti ngati tiwerengeranso ma metric a chiwembu cham'mbuyomu, poganizira zakuthupi za rauta ya R5, mtunda wotheka wa njira yochokera ku R2 kupita ku netiweki ya 10.1.1.0/24 idzakhala 26112. Tiyeni tiwone pamikhalidwe yofananayo mu magawo a rauta ya R1 polemba lamulo kuwonetsa ip njira. Monga mukuwonera, pa network ya 10.1.1.0/24 kuwerengeranso kunapangidwa ndipo tsopano mtengo wa metric ndi 26368, osati 28416.
Mutha kuyang'ananso kuwerengera uku kutengera chithunzi cha kanema wam'mbuyomu, poganizira za Packet Tracer, yomwe imagwiritsa ntchito magawo ena amtundu wapamalo, makamaka, kuchedwa kosiyana. Yesani kupanga maukonde anu topology ndi ma throughput and latency values ββndikuwerengera magawo ake. Muzochita zanu simudzafunika kuwerengera zotere, dziwani momwe zimachitikira. Chifukwa ngati mukufuna kugwiritsa ntchito kusanja katundu komwe tatchula muvidiyo yapitayi, muyenera kudziwa momwe mungasinthire latency. Sindikulimbikitsani kukhudza bandwidth; kusintha EIGRP, ndikokwanira kusintha mayendedwe a latency.
Chifukwa chake, mutha kusintha bandwidth ndikuchedwetsa, posintha ma metric a EIGRP. Iyi ikhala homuweki yanu. Monga mwachizolowezi, mutha kutsitsa patsamba lathu ndikugwiritsa ntchito ma topology onse mu Packet Tracer. Tiyeni tibwerere ku chithunzi chathu.
Monga mukuwonera, kukhazikitsa EIGRP ndikosavuta, ndipo mutha kugwiritsa ntchito njira ziwiri zopangira maukonde: ndi kapena popanda chigoba chosinthira. Monga OSPF, mu EIGRP tili ndi 3 matebulo: oyandikana tebulo, topology tebulo ndi njira tebulo. Tiyeni tionenso matebulo amenewa.
Tiyeni tilowe mu zoikamo za R1 ndikuyamba ndi tebulo la oyandikana nawo polowetsa lamulo la ip eigrp nerp. Tikuwona kuti rauta ili ndi oyandikana nawo atatu.
Adilesi 10.1.12.2 ndi rauta R2, 10.1.13.1 ndi rauta R3 ndi 10.1.14.1 ndi rauta R4. Gome likuwonetsanso momwe njira zolumikizirana ndi anansi zimachitikira. The Hold Uptime ikuwonetsedwa pansipa. Ngati mukukumbukira, iyi ndi nthawi yomwe imasinthidwa kukhala nthawi zitatu za Hello, kapena 3x3s = 5s. Ngati panthawiyi yankho Moni silinalandiridwe kuchokera kwa mnansi, kugwirizanako kumaonedwa kuti kwatayika. Mwaukadaulo, ngati oyandikana nawo ayankha, mtengowu umatsika mpaka 15s ndikubwerera ku 10s. Masekondi aliwonse a 15, rauta imatumiza uthenga wa Hello, ndipo oyandikana nawo amayankha mkati mwa masekondi asanu otsatira. Zotsatirazi zikuwonetsa nthawi yobwerera ndi kubwerera kwa mapaketi a SRTT, omwe ndi 5 ms. Kuwerengera kwake kumachitidwa ndi protocol ya RTP, yomwe EIGRP imagwiritsa ntchito kukonza kulumikizana pakati pa oyandikana nawo. Tsopano tiyang'ana pa tebulo la topology, lomwe timagwiritsa ntchito lamulo la ip eigrp topology.
The OSPF protocol mu nkhani iyi akufotokoza zovuta, topology zakuya zomwe zikuphatikizapo routers onse ndi njira zonse zilipo maukonde. EIGRP imawonetsa ma topology osavuta kutengera njira ziwiri. Metric yoyamba ndi mtunda wocheperako, mtunda wotheka, womwe ndi umodzi mwamakhalidwe anjira. Chotsatira, mtengo wamtunda womwe wanenedwa umawonetsedwa kudzera pa slash - iyi ndi metric yachiwiri. Kwa netiweki 10.1.1.0/24, kulumikizana komwe kumachitika kudzera pa rauta 10.1.12.2, mtengo wotheka wa mtunda ndi 26368 (mtengo woyamba m'makolo). Mtengo womwewo umayikidwa patebulo lolowera chifukwa router 10.1.12.2 ndi wolowa m'malo.
Ngati lipoti mtunda wa rauta wina, mu nkhani iyi mtengo wa 3072 rauta 10.1.14.4, ndi zosakwana mtunda zotheka wa mnansi wake wapafupi, ndiye rauta ichi ndi zotheka wotsatira. Ngati kugwirizana ndi rauta 10.1.12.2 kutayika kudzera mu mawonekedwe a GigabitEthernet 0/0, rauta 10.1.14.4 idzatenga ntchito ya Successor.
Mu OSPF, kuwerengera njira kudzera mu rauta zosunga zobwezeretsera kumatenga nthawi yambiri, yomwe imakhala ndi gawo lalikulu pamene kukula kwa maukonde ndikofunika. EIGRP sikutaya nthawi pamawerengedwe otere chifukwa imadziwa kale munthu yemwe ali ndi udindo wotsatira. Tiyeni tiwone tebulo la topology pogwiritsa ntchito njira yowonetsera ip.
Monga mukuwonera, ndi Wopambana, ndiye kuti, rauta yokhala ndi mtengo wotsika kwambiri wa FD, womwe umayikidwa patebulo lolowera. Apa njira yokhala ndi metric 26368 ikuwonetsedwa, yomwe ndi FD ya wolandila rauta 10.1.12.2.
Pali malamulo atatu omwe angagwiritsidwe ntchito kuyang'ana makonda a protocol pa mawonekedwe aliwonse.
Choyamba ndikuwonetsa kuthamanga-config. Kugwiritsa ntchito, ndikutha kuwona zomwe protocol ikuyendetsa pa chipangizochi, izi zikuwonetsedwa ndi uthenga rauta eigrp 1 kwa network 10.0.0.0. Komabe, kuchokera pazidziwitso izi sizingatheke kudziwa kuti ndi njira ziti zomwe protocol iyi ikuyendera, chifukwa chake ndiyenera kuyang'ana mndandandawo ndi magawo amitundu yonse ya R1. Panthawi imodzimodziyo, ndimamvetsera octet woyamba wa adiresi ya IP ya mawonekedwe aliwonse - ngati ayamba ndi 10, ndiye kuti EIGRP ikugwira ntchito pa mawonekedwe awa, popeza pamenepa chikhalidwe chofanana ndi adiresi 10.0.0.0 chikukhutitsidwa. . Chifukwa chake, mutha kugwiritsa ntchito chiwonetsero chothamangitsa-config kuti mudziwe kuti ndi protocol iti yomwe ikuyenda pa mawonekedwe aliwonse.
Lamulo lotsatira loyesa ndikuwonetsa ma protocol a ip. Mukalowa lamuloli, mutha kuwona kuti njira yolowera ndi "eigrp 1". Kenako, ma coefficients a K powerengera ma metric akuwonetsedwa. Phunziro lawo silinaphatikizidwe mu maphunziro a ICND, kotero m'makonzedwe tidzavomereza zokhazikika za K.
Apa, monga mu OSPF, rauta-ID anasonyeza monga IP adiresi: 10.1.12.1. Ngati simupereka pamanja gawoli, makinawo amasankha mawonekedwe a loopback omwe ali ndi adilesi yapamwamba kwambiri ya IP monga RID.
Imanenanso kuti chidule cha njira zodziwikiratu ndizozimitsidwa. Izi ndi zofunika kwambiri, chifukwa ngati tigwiritsa ntchito ma subnet okhala ndi ma adilesi a IP opanda class, ndibwino kuletsa mwachidule. Ngati mutsegula ntchitoyi, zotsatirazi zidzachitika.
Tiyerekeze kuti tili ndi routers R1 ndi R2 ntchito EIGRP, ndi 2 maukonde olumikizidwa kwa rauta R3: 10.1.2.0, 10.1.10.0 ndi 10.1.25.0. Ngati autosummation imayatsidwa, ndiye pamene R2 imatumiza zosintha kwa rauta R1, zikuwonetsa kuti zilumikizidwa ndi netiweki 10.0.0.0/8. Izi zikutanthauza kuti zida zonse zolumikizidwa ndi netiweki ya 10.0.0.0/8 zimatumiza zosintha kwa izo, ndipo magalimoto onse opita ku netiweki ya 10. ayenera kutumizidwa ku rauta ya R2.
Chimachitika ndi chiyani ngati mutagwirizanitsa rauta ina R1 ku rauta yoyamba R3, yolumikizidwa ndi maukonde 10.1.5.0 ndi 10.1.75.0? Ngati rauta R3 imagwiritsanso ntchito chidule cha auto-chidule, ndiye kuti imauza R1 kuti magalimoto onse opita ku netiweki 10.0.0.0/8 ayenera kuyankhidwa.
Ngati rauta R1 chikugwirizana ndi rauta R2 pa maukonde 192.168.1.0, ndi rauta R3 pa maukonde 192.168.2.0, ndiye EIGRP kokha kupanga auto-chidule zisankho pa mlingo R2, zimene si zolakwika. Choncho, ngati mukufuna kugwiritsa ntchito chidule-chidule cha rauta inayake, kwa ife ndi R2, onetsetsani kuti ma subnets onse okhala ndi octet yoyamba ya IP adilesi 10. amangolumikizidwa ndi rautayo. Simuyenera kukhala ndi maukonde olumikizidwa 10. kwinakwake, kwa rauta ina. Woyang'anira ma netiweki omwe akukonzekera kugwiritsa ntchito chidule cha njira zodziyimira pawokha ayenera kuwonetsetsa kuti maukonde onse okhala ndi ma adilesi omwewo amalumikizidwa ndi rauta yomweyo.
M'malo mwake, ndikosavuta kuti ntchito ya auto-sum iyimitsidwe mwachisawawa. Pankhaniyi, rauta R2 adzatumiza zosintha osiyana rauta R1 aliyense maukonde olumikizidwa kwa izo: mmodzi kwa 10.1.2.0, wina 10.1.10.0 ndi wina 10.1.25.0. Pankhaniyi, tebulo lolowera R1 lidzawonjezeredwa osati ndi imodzi, koma njira zitatu. Zoonadi, mwachidule kumathandiza kuchepetsa chiwerengero cha zolembera pa tebulo lamayendedwe, koma ngati mukukonzekera molakwika, mukhoza kuwononga maukonde onse.
Tiyeni tibwerere ku lamulo la ip protocols. Zindikirani kuti apa mutha kuwona Kutalikirana kwa 90, komanso Njira Yapamwamba yolozera katundu, yomwe imasinthira ku 4. Njira zonsezi zili ndi mtengo womwewo. Chiwerengero chawo chikhoza kuchepetsedwa, mwachitsanzo, mpaka 2, kapena kuwonjezeka mpaka 16.
Kenako, kukula kwakukulu kwa kauntala ya hop, kapena magawo oyendetsa, amatchulidwa kuti 100, ndipo mtengo Wopambana metric variance = 1 watchulidwa. Mu EIGRP, Kusiyana kumalola mayendedwe omwe ma metrics awo ali pafupi kwambiri mu mtengo kuti awonedwe mofanana, zomwe zimalola kuti muwonjezere misewu ingapo yokhala ndi ma metrics osafanana pa tebulo lamayendedwe , zomwe zimatsogolera ku subnet yomweyo. Tidzawona izi mwatsatanetsatane pambuyo pake.
The Routing for Networks: Zambiri za 10.0.0.0 ndi chisonyezo chakuti tikugwiritsa ntchito njirayi popanda chigoba chakumbuyo. Ngati tipita ku zoikamo za R2, pomwe tidagwiritsa ntchito chigoba chakumbuyo, ndikulowetsa lamulo la ip protocol, tiwona kuti Routing for Networks ya rauta iyi ili ndi mizere iwiri: 10.1.12.0/24 ndi 10.1.25.0/24, ndiko kuti, pali chisonyezero cha kugwiritsa ntchito chigoba cha wildcard.
Kuti mugwiritse ntchito, simuyenera kukumbukira ndendende zomwe malamulo oyesa amapangira - muyenera kungowagwiritsa ntchito ndikuwona zotsatira zake. Komabe, pamayeso simudzakhala ndi mwayi woyankha funsoli, lomwe lingathe kufufuzidwa ndi lamulo la ip protocols. Muyenera kusankha yankho limodzi lolondola kuchokera muzosankha zingapo zomwe mukufuna. Ngati mudzakhala katswiri wapamwamba wa Cisco ndipo simungalandire chiphaso cha CCNA chokha, komanso CCNP kapena CCIE, muyenera kudziwa kuti ndi chidziwitso chotani chomwe chimapangidwa ndi izi kapena lamulo loyesa ndi zomwe malamulo ophera amapangidwira. Simuyenera kudziwa gawo laukadaulo la zida za Cisco, komanso kumvetsetsa makina opangira a Cisco iOS kuti muthe kukonza bwino zida izi.
Tiyeni tibwererenso kuzidziwitso zomwe dongosololi limapanga poyankha kulowa kwa ip protocols command. Timawona Magwero a Chidziwitso cha Njira, zoperekedwa ngati mizere yokhala ndi adilesi ya IP ndi mtunda wowongolera. Mosiyana zambiri OSPF, EIGRP mu nkhani iyi sagwiritsa ntchito rauta ID, koma IP maadiresi routers.
Lamulo lomaliza lomwe limakupatsani mwayi wowona mwachindunji mawonekedwe amalo olumikizirana ndikuwonetsa ma ip eigrp. Ngati mulowetsa lamuloli, mutha kuwona zolumikizira zonse za rauta zomwe zikuyenda EIGRP.
Choncho, pali njira zitatu zowonetsetsa kuti chipangizochi chikuyendetsa EIRGP protocol.
Tiyeni tiwone kulinganiza kofanana kwa mtengo, kapena kusanja kofananako. Ngati zolumikizira 2 zili ndi mtengo womwewo, kusanja kwa katundu kudzagwiritsidwa ntchito mwachisawawa.
Tiyeni tigwiritse ntchito Packet Tracer kuti tiwone momwe izi zimawonekera pogwiritsa ntchito netiweki topology yomwe tikudziwa kale. Ndiroleni ndikukumbutseni kuti bandwidth ndi kuchedwa kwamitengo ndizofanana pamakina onse pakati pa ma routers omwe akuwonetsedwa. Ndimayatsa mawonekedwe a EIGRP kwa ma routers onse 4, omwe ndimapita ku zoikamo zawo imodzi ndi imodzi ndikulemba malamulo config terminal, rauta eigrp ndi network 10.0.0.0.
Tiyeni tiyerekeze kuti tiyenera kusankha njira mulingo woyenera kwambiri R1-R4 kwa loopback pafupifupi mawonekedwe 10.1.1.1, pamene onse anayi maulalo R1-R2, R2-R4, R1-R3 ndi R3-R4 ndi mtengo womwewo. Ngati mulowetsa lamulo lachiwonetsero cha ip mu CLI console ya rauta R1, mukhoza kuona kuti maukonde 10.1.1.0/24 akhoza kufika kudzera munjira ziwiri: kudzera pa rauta 10.1.12.2 yolumikizidwa ndi mawonekedwe a GigabitEthernet0/0, kapena kudzera pa rauta 10.1.13.3 .0 yolumikizidwa ku mawonekedwe a GigabitEthernet1/XNUMX, ndipo misewu yonseyi ili ndi ma metrics omwewo.
Ngati tilowetsa lamulo la ip eigrp topology, tiwona zomwezo apa: 2 Olandila olowa m'malo okhala ndi ma FD ofanana a 131072.
Mpaka pano, taphunzira zomwe ECLB ndi yofanana katundu kusanja, zomwe zikhoza kuchitika mu OSPF ndi EIGRP.
Komabe, EIGRP ilinso ndi kusalinganika kwamitengo yofanana (UCLB), kapena kusalinganiza kosafanana. Nthawi zina, ma metrics amatha kusiyana pang'ono, zomwe zimapangitsa kuti njirazo zikhale zofanana, momwemo EIGRP imalola kuwongolera katundu pogwiritsa ntchito mtengo wotchedwa "kusiyana".
Tiyerekeze kuti tili ndi rauta imodzi yolumikizidwa ndi ena atatu - R1, R2 ndi R3.
Router R2 ili ndi mtengo wotsika kwambiri FD=90, chifukwa chake imakhala ngati Wolowa m'malo. Tiyeni tiganizire za RD ya njira zina ziwirizi. R1's RD ya 80 ndi yocheperapo kuposa R2's FD, kotero R1 imakhala ngati chosungira Chotheka Chotsatira rauta. Popeza RD wa rauta R3 ndi wamkulu kuposa FD wa rauta R1, izo sangakhoze kukhala Wopambana zotheka.
Chifukwa chake, tili ndi rauta - Wotsatira ndi rauta - Wopambana Wotheka. Mutha kuyika rauta R1 patebulo lolowera pogwiritsa ntchito mitundu yosiyanasiyana. Mu EIGRP, mwachisawawa Kusiyana = 1, kotero rauta R1 ngati Wopambana Wotheka sali patebulo lolowera. Ngati tigwiritsa ntchito mtengo Wosiyana = 2, ndiye kuti mtengo wa FD wa rauta R2 udzachulukitsidwa ndi 2 ndipo udzakhala 180. Pankhaniyi, FD ya rauta R1 idzakhala yochepa kuposa FD ya rauta R2: 120 <180, kotero rauta R1 adzaikidwa pa tebulo la mayendedwe ngati Wotsatira 'a.
Ngati tikufananiza Kusiyana = 3, ndiye kuti mtengo wa FD wa wolandila R2 udzakhala 90 x 3 = 270. Pankhaniyi, router R1 idzalowanso mu tebulo loyendetsa, chifukwa 120 <270. Musasokonezedwe ndi mfundo yakuti. rauta R3 samalowa mu tebulo ngakhale kuti FD yake = 250 ndi mtengo wa Kusiyana = 3 idzakhala yochepa kuposa FD ya rauta R2, kuyambira 250 <270. Chowonadi ndi chakuti kwa rauta R3 chikhalidwe RD <FD Otsatira akadalibe kukumana, popeza RD = 180 si yochepa, koma kuposa FD = 90. Choncho, popeza R3 sichikhoza kukhala Yotheka Yotheka, ngakhale ndi mtengo wosiyana wa 3, sichidzalowabe mu tebulo loyendetsa.
Chifukwa chake, posintha mtengo wa Kusiyana, titha kugwiritsa ntchito kusanja kofananako kuti tiphatikize njira yomwe tikufuna patebulo lamayendedwe.
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Source: www.habr.com