Nhasi tichaenderera mberi nekudzidza kwedu kwechikamu 2.6 che ICND2 kosi uye kutarisa kugadzirisa nekuyedza EIGRP protocol. Kumisa EIGRP kuri nyore kwazvo. Sezvakaita chero imwe nzira yeprotocol yakadai seRIP kana OSPF, iwe unopinda murouter's global configuration mode uye woisa router eigrp <#> command, apo # ndiyo AS nhamba.
Iyi nhamba inofanira kunge yakafanana kune ese maturusi, semuenzaniso, kana uine 5 routers uye vese vanoshandisa EIGRP, saka ivo vanofanirwa kunge vaine imwechete autonomous system nhamba. MuOSPF iyi iProcess ID, kana kuti process number, uye muEIGRP ndiyo yakazvimirira system nhamba.
MuOSPF, kugadza pedyo, iyo Process ID yemarouter akasiyana inogona kusaenderana. MuEIGRP, nhamba dzeAS dzevavakidzani vose dzinofanira kufanana, kana zvisina kudaro nharaunda haizogadzirwe. Pane nzira mbiri dzekugonesa EIGRP protocol - pasina kudoma reverse mask kana kutsanangura masiki emusango.
Muchiitiko chekutanga, network command inotsanangura classful IP kero yemhando 10.0.0.0. Izvi zvinoreva kuti chero interface ine yekutanga octet ye IP kero 10 ichatora chikamu muEIGRP routing, ndiko kuti, mune iyi kesi, ese makirasi A kero etiweki 10.0.0.0 anoshandiswa. Kunyange kana iwe ukapinda chaiyo subnet se 10.1.1.10 pasina kutsanangura reverse mask, iyo protocol icharamba ichishandura kune IP kero se 10.0.0.0. Naizvozvo, ramba uchifunga kuti hurongwa huchagamuchira chero kero yeiyo subnet yakatsanangurwa, asi ichaiona sekero yekirasi uye ichashanda netiweki yese yekirasi A, B kana C, zvichienderana nekukosha kweiyo octet yekutanga. ye IP kero.
Kana iwe uchida kumhanya EIGRP pane 10.1.12.0/24 subnet, iwe uchada kushandisa murairo une reverse mask yefomu network 10.1.12.0 0.0.0.255. Saka, EIGRP inoshanda neclassful addressing network pasina reverse mask, uye neclassless subnets, kushandiswa kwewildcard mask kunosungirwa.
Ngatienderei kuPacket Tracer uye tishandise network topology kubva kune yapfuura vhidhiyo tutorial, yatakadzidza nayo nezve pfungwa dzeFD neRD.
Ngatimise network iyi muchirongwa tione kuti inoshanda sei. Tine 5 routers R1-R5. Kunyangwe Packet Tracer inoshandisa ma routers ane GigabitEthernet interfaces, ini pamaoko ndakachinja network bandwidth uye latency kuti ienderane netopology yakambokurukurwa. Panzvimbo ye 10.1.1.0/24 network, ndakabatanidza virtual loopback interface kuR5 router, kwandakapa kero 10.1.1.1/32.
Ngatitange nekugadzirisa iyo R1 router. Ini handisati ndagonesa EIGRP pano, asi ndangopa IP kero kune router. Ne config t command, ndinoisa global configuration mode uye ndinogonesa protocol nekunyora murairo router eigrp <autonomous system number>, iyo inofanira kunge iri pakati pe1 kusvika 65535. Ndinosarudza nhamba 1 uye tinya Enter. Uyezve, sezvandakataura, unogona kushandisa nzira mbiri.
Ndinogona kunyora network uye IP kero yetiweki. Networks 1/10.1.12.0, 24/10.1.13.0 uye 24/10.1.14.0 dzakabatana kune router R24. Vese vari pa "chegumi" network, saka ini ndinogona kushandisa imwechete general command, network 10.0.0.0. Kana ndikadzvanya Enter, EIGRP inenge ichimhanya pamativi ese matatu. Ndinogona kutarisa izvi nekuisa murairo do show ip eigrp interfaces. Isu tinoona kuti protocol iri kushanda pa2 GigabitEthernet interfaces uye imwe Serial interface iyo iyo R4 router yakabatana.
Kana ndikamhanya iyo do show ip eigrp interfaces raira zvakare kutarisa, ndinogona kuona kuti EIGRP iri kushanda pazviteshi zvese.
Ngatiende ku router R2 uye titange protocol tichishandisa config t uye router eigrp mirairo 1. Panguva ino hatingashandisi murairo wetiweki yose, asi tichashandisa reverse mask. Kuti ndiite izvi, ndinoisa mutemo network 10.1.12.0 0.0.0.255. Kuti utarise marongero, shandisa iyo do show ip eigrp interfaces command. Isu tinoona kuti EIGRP iri kushanda chete pane interface Gig0/0, nekuti iyi chete interface inofanana nematanho emurairo wakapinda.
Muchiitiko ichi, mask reverse zvinoreva kuti EIGRP modhi ichashanda pane chero network iyo yekutanga octets matatu eiyo IP kero ndeye 10.1.12. Kana network ine maparamendi akafanana yakabatana kune imwe interface, ipapo iyi interface ichawedzerwa kune runyorwa rwezviteshi pane iyo protocol iri kushanda.
Ngatiwedzerei imwe network ine command network 10.1.25.0 0.0.0.255 uye tione kuti rondedzero yezvibvumirano zvinotsigira EIGRP zvino ichaita sei. Sezvauri kuona, isu tave neiyo Gig0/1 interface yakawedzerwa. Ndapota cherechedza kuti Gig0 / 0 interface ine vezera rimwe chete, kana muvakidzani mumwe - router R1, iyo yatatogadzira. Gare gare ini ndichakuratidza mirairo yekusimbisa marongero, ikozvino isu ticharamba tichigadzira EIGRP yezvishandiso zvasara. Isu tinogona kana kusashandisa reverse mask kana tichigadzira chero ma routers.
Ndinoenda kuCLI console yeR3 router uye mune yepasi rose configuration mode ndinonyora mirairo router eigrp 1 uye network 10.0.0.0, zvino ndinoenda muzvirongwa zveR4 router uye ndinonyora mirairo yakafanana pasina kushandisa mask reverse.
Iwe unogona kuona kuti EIGRP iri nyore sei kugadzirisa pane OSPF - mune yekupedzisira kesi iwe unofanirwa kuterera kune ABRs, nzvimbo, kuona nzvimbo yavo, nezvimwe. Hapana chimwe cheizvi chinodiwa pano - ndinongoenda kune zvigadziriso zvepasi rose zveR5 router, nyora mirairo router eigrp 1 uye network 10.0.0.0, uye ikozvino EIGRP iri kushanda pamidziyo yese mishanu.
Ngatitarisei ruzivo rwatakataura nezvarwo muvhidhiyo yapfuura. Ini ndinopinda muR2 marongero uye ndonyora iyo yekuraira ratidza ip nzira, uye sisitimu inoratidza zvinodiwa.
Ngatiteererei kune R5 router, kana kuti, kune 10.1.1.0/24 network. Uyu ndiwo mutsetse wekutanga mutafura yekufambisa. Nhamba yekutanga mumabhuraketi inzvimbo yekutonga, yakaenzana ne90 yeEIGRP protocol. Vara D rinoreva kuti nzira iyi inopiwa neEIGRP, uye nhamba yechipiri mumaparenthesi, yakaenzana ne26112, ndiyo R2-R5 nzira metric. Kana tikadzokera kudhayagiramu yapfuura, tinogona kuona kuti metric kukosha pano ndeye 28416, saka ini ndinofanira kutarisa kuti chikonzero cheiyi mutsauko chii.
Nyora iyo show interface loopback 0 command mune iyo R5 marongero. Chikonzero ndechekuti isu takashandisa loopback interface: kana iwe ukatarisa kunonoka kweR5 padhayagiramu, yakaenzana ne10 ΞΌs, uye mumagadzirirwo e router tinopihwa ruzivo rwekuti DLY kunonoka ndeye 5000 microseconds. Ngationei kuti ndingashandura kukosha uku. Ini ndinoenda muR5 yepasirese yekumisikidza modhi uye ndonyora iyo interface loopback 0 uye kunonoka mirairo. Iyo sisitimu inosimudzira kuti kukosha kwekunonoka kunogona kupihwa muyero kubva 1 kusvika 16777215, uye mumakumi e microseconds. Sezvo mumakumi kunonoka kukosha kwe 10 ΞΌs kunoenderana ne1, ini ndinopinda kunonoka murairo 1. Isu tinotarisa maitiro ekugadzirisa zvakare uye ona kuti iyo system haina kugamuchira kukosha uku, uye haidi kuita izvi kunyange pakuvandudza network. parameters muzvirongwa zveR2.
Zvisinei, ndinokuvimbisai kuti kana tikaverenga zvakare metric yechirongwa chekare, tichifunga nezvemuviri weR5 router, iyo inokwanisika kureba kureba kwenzira kubva kuR2 kuenda ku10.1.1.0/24 network ichava 26112. Ngatitarisei pamaitiro akafanana mumaparamita eR1 router nekunyora murairo ratidza ip nzira. Sezvauri kuona, kune 10.1.1.0/24 network kuverengerwa kwakaitwa uye iko zvino metric kukosha ndeye 26368, kwete 28416.
Iwe unogona kutarisa iyi recalculation zvichibva padhayagiramu kubva kune yapfuura vhidhiyo tutori, uchifunga nezve maficha ePacket Tracer, iyo inoshandisa mamwe emuviri maparamendi eiyo interfaces, kunyanya, kunonoka kwakasiyana. Edza kugadzira yako yetiweki topology neiyi throughput uye latency values ββuye uverenge ma paramita ayo. Mumabasa ako ekuita hauzodi kuita macalculation akadai, ingoziva kuti zvinoitwa sei. Nekuti kana iwe uchida kushandisa kuyera kuyera kwatakataura muvhidhiyo yekupedzisira, iwe unofanirwa kuziva kuti ungashandura sei latency. Ini handikurudzire kubata bandwidth; kugadzirisa EIGRP, zvakakwana kuti uchinje latency maitiro.
Saka, iwe unogona kushandura bandwidth uye kunonoka kukosha, nekudaro uchinje iyo EIGRP metric kukosha. Iri richava basa rako rechikoro. Semazuva ese, kune izvi unogona kudhawunirodha kubva kune yedu webhusaiti uye shandisa ese ari maviri network topology muPacket Tracer. Ngatidzokerei kudhayagiramu yedu.
Sezvauri kuona, kumisikidza EIGRP iri nyore kwazvo, uye unogona kushandisa nzira mbiri kudoma network: ine kana isina reverse mask. Kufanana neOSPF, muEIGRP tine matafura matatu: tafura yemuvakidzani, tafura yetopology uye tafura yenzira. Ngatitarisei pamatafura aya zvakare.
Ngatipindei muzvirongwa zveR1 uye titange netafura yemuvakidzani nekupinda iyo show ip eigrp vavakidzani kuraira. Tinoona kuti router ine vavakidzani vatatu.
Kero 10.1.12.2 ndiyo router R2, 10.1.13.1 ndiyo router R3 uye 10.1.14.1 ndiyo router R4. Iyo tafura inoratidza zvakare iyo nzira yekutaurirana nevavakidzani inoitwa. Iyo Hold Uptime inoratidzwa pazasi. Kana iwe uchirangarira, ino inguva inosarudzika kune 3 Mhoro nguva, kana 3x5s = 15s. Kana panguva ino mhinduro Hello haina kugamuchirwa kubva kumuvakidzani, kubatana kunoonekwa sekurasika. Nehunyanzvi, kana vavakidzani vakapindura, kukosha uku kunodzikira kusvika pa10s vozodzokera ku15s. Masekonzi mashanu ega ega, router inotumira Mhoro meseji, uye vavakidzani vanoipindura mukati memasekondi mashanu anotevera. Zvinotevera zvinoratidza nguva yekufamba-famba yemapakiti eSRTT, ari 5 ms. Kuverenga kwayo kunoitwa neiyo RTP protocol, iyo EIGRP inoshandisa kuronga kutaurirana pakati pevavakidzani. Iye zvino tichatarisa patafura yepamusoro, iyo yatinoshandisa iyo show ip eigrp topology command.
Iyo OSPF protocol munyaya iyi inotsanangura yakaoma, yakadzama topology iyo inosanganisira ma routers ose uye migero yose inowanikwa mumambure. EIGRP inoratidza yakarerutswa topology yakavakirwa panzira mbiri metrics. Yekutanga metric ndiyo idiki inokwanisika chinhambwe, chinhambwe chinogoneka, chinova chimwe chehunhu hwenzira. Tevere, kukosha kwechinhambwe kunoratidzwa kuburikidza ne slash - iyi ndiyo yechipiri metric. Kune network 10.1.1.0/24, kutaurirana kunoitwa kuburikidza nerouter 10.1.12.2, iyo inogoneka kureba ukoshi ndeye 26368 (yekutanga kukosha mumaparentheses). Kukosha kwakafanana kunoiswa mutafura yekufambisa nokuti router 10.1.12.2 inotsiva.
Kana iyo yakashumwa chinhambwe cheimwe router, muchiitiko ichi kukosha kwe3072 router 10.1.14.4, iri pasi pechinhambwe chinogoneka chemuvakidzani wayo wepedyo, saka router iyi ndiyo Feasible Successor. Kana iyo yekubatanidza ne router 10.1.12.2 yakarasika kuburikidza neGigabitEthernet 0/0 interface, router 10.1.14.4 inotora iyo Successor basa.
In OSPF, kukarukureta nzira kuburikidza negadziriro yeparutivi router kunotora imwe uwandu nguva, iyo inoita basa rinokosha kana samambure saizi inokosha. EIGRP haina kutambisa nguva pakuverenga kwakadaro nekuti inotoziva mukwikwidzi weiyo Successor basa. Ngatitarisei iyo topology tafura tichishandisa iyo show ip nzira yekuraira.
Sezvauri kuona, iSuccessor, ndiko kuti, iyo router ine yakaderera FD kukosha, iyo inoiswa mutafura yekufambisa. Pano chiteshi chine metric 26368 inoratidzwa, inova FD yemugamuchiri router 10.1.12.2.
Pane mirairo mitatu inogona kushandiswa kutarisa routing protocol marongero kune yega yega interface.
Yekutanga ndeye show running-config. Ndichiishandisa, ndinoona kuti ndeipi protocol iri kushanda pamudziyo uyu, izvi zvinoratidzwa neshoko routa eigrp 1 yetiweki 10.0.0.0. Nekudaro, kubva paruzivo urwu hazvigoneke kuona kuti ndeipi inopindirana iyi protocol iri kushanda pairi, saka ini ndinofanira kutarisa iyo rondedzero ine maparamita eese maR1 interfaces. Panguva imwecheteyo, ndinoteerera kune yekutanga octet ye IP kero yega yega interface - kana inotanga ne10, ipapo EIGRP inoshanda pane iyi interface, sezvo munyaya iyi mamiriro ekufananidza kero yetiweki 10.0.0.0 inogutsikana . Naizvozvo, unogona kushandisa show inomhanya-config command kuti uone kuti ndeipi protocol iri kushanda pane yega yega interface.
Iyo inotevera bvunzo yekuraira ndeye show ip protocol. Mushure mekupinda uyu murairo, unogona kuona kuti routing protocol ndeye "eigrp 1". Tevere, kukosha kweiyo K coefficients yekuverenga iyo metric inoratidzwa. Chidzidzo chavo hachina kubatanidzwa mukosi yeICND, saka muzvigadziriso tichagamuchira iyo yakasarudzika K kukosha.
Pano, sezvakaita OSPF, Router-ID inoratidzwa se IP kero: 10.1.12.1. Kana iwe usingape iyi parameter nemaoko, sisitimu yacho inosarudza otomatiki iyo loopback interface ine yepamusoro IP kero seRID.
Inoenderera mberi ichiti otomatiki nzira pfupiso yakavharwa. Aya akakosha mamiriro, nekuti kana tikashandisa subnets ine classless IP kero, zviri nani kudzima pfupiso. Kana iwe ukagonesa basa iri, zvinotevera zvichaitika.
Ngatimbofungidzira kuti tine routers R1 uye R2 kushandisa EIGRP, uye 2 network zvakabatana router R3: 10.1.2.0, 10.1.10.0 uye 10.1.25.0. Kana autosummation ikagoneswa, zvino kana R2 inotumira update kune router R1, inoratidza kuti yakabatana kune network 10.0.0.0/8. Izvi zvinoreva kuti midziyo yose yakabatana ne 10.0.0.0/8 network inotumira zvinyorwa kwairi, uye motokari yose inotarirwa kune 10. network inofanira kuendeswa kune R2 router.
Chii chinoitika kana iwe ukabatanidza imwe router R1 kune yekutanga router R3, yakabatana kune network 10.1.5.0 uye 10.1.75.0? Kana router R3 inoshandisawo otomatiki-pfupiso, zvino ichaudza R1 kuti traffic yese yakarongerwa network 10.0.0.0/8 inofanira kutariswa kwairi.
Kana router R1 yakabatana kune router R2 pa 192.168.1.0 network, uye kune router R3 pa 192.168.2.0 network, ipapo EIGRP ichaita chete auto-pfupiso zvisarudzo paR2 pamwero, izvo zvisiri izvo. Saka, kana iwe uchida kushandisa otomatiki-pfupiso kune chaiyo router, kwatiri isu iR2, ita shuwa kuti ese ma subnets ane yekutanga octet ye IP kero 10. yakabatana chete kune iyo router. Iwe haufaniri kunge uine network yakabatana 10. kune imwe nzvimbo, kune imwe router. Mutariri wetiweki anoronga kushandisa otomatiki nzira yekupfupisa anofanirwa kuve nechokwadi chekuti ese ma network ane yakafanana classful kero akabatana kune imwecheteyo router.
Mukuita, zviri nyore kuti auto-sum basa rivharwe nekusarudzika. Muchiitiko ichi, router R2 ichatumira zvinyorwa zvakasiyana kune router R1 kune imwe neimwe yemataneti akabatanidzwa nayo: imwe ye10.1.2.0, imwe ye10.1.10.0 uye imwe ye10.1.25.0. Muchiitiko ichi, tafura yekufambisa R1 ichadzorerwa kwete imwe chete, asi nzira nhatu. Zvechokwadi, kupfupisa kunobatsira kuderedza nhamba yezvinyorwa mutafura yekufambisa, asi kana ukaronga zvisizvo, unogona kuparadza network yose.
Ngatidzokere kune iyo show ip protocols command. Ziva kuti pano iwe unogona kuona Kureba kukosha kwe90, pamwe neMaximum nzira yekuenzanisa mitoro, iyo inosarudzika kune 4. Yese nzira idzi dzine mutengo wakafanana. Nhamba yavo inogona kuderedzwa, semuenzaniso, kusvika ku2, kana kuwedzera kusvika ku16.
Zvadaro, ukuru hwepamusoro hwekaunda yehop, kana zvikamu zvenzira, zvinotsanangurwa se 100, uye kukosha kweMaximum metric variance = 1 inotsanangurwa. MuEIGRP, Kusiyana kunobvumira nzira dzine mametrics ari pedyo neukoshi kuti dzinzi dzakaenzana, izvo zvinobvumira. iwe yekuwedzera nzira dzinoverengeka dzine asina kuenzana metrics patafura yenzira, inotungamira kune imwecheteyo subnet. Tichatarisa izvi zvakadzama gare gare.
The Routing for Networks: 10.0.0.0 ruzivo chiratidzo chekuti tiri kushandisa sarudzo pasina backmask. Kana tikapinda muzvirongwa zveR2, kwatakashandisa iyo reverse mask, uye pinda iyo show ip protocols murairo, tichaona kuti Routing for Networks for router iyi ine mitsetse miviri: 10.1.12.0/24 uye 10.1.25.0/24, ndiko kuti, pane chiratidzo chekushandiswa kwemasikisi emusango.
Nezvinangwa zvinoshanda, haufanirwe kurangarira chaizvo ruzivo rwunoburitswa nemirairo yebvunzo - unongoda kuishandisa uye kuona mhedzisiro. Nekudaro, mubvunzo hauzove nemukana wekupindura mubvunzo, unogona kutariswa neiyo show ip protocols command. Iwe unozofanira kusarudza mhinduro imwe yechokwadi kubva pane akati wandei anofungidzirwa sarudzo. Kana iwe uchizova nyanzvi yepamusoro-soro yeCisco uye usingagamuchire chete chitupa cheCCNA, asiwo CCNP kana CCIE, unofanira kuziva kuti ndeupi ruzivo rwakananga runogadzirwa neizvi kana kuti murairo wekuedza uye kuti mirairo yekuuraya inoitirwa chii. Iwe haufanire kugona kwete chete tekinoroji chikamu cheCisco zvishandiso, asi zvakare kunzwisisa iyo Cisco iOS inoshanda sisitimu kuitira kuti ugadzirise nemazvo aya maturusi etiweki.
Ngatidzokerei kune ruzivo rwunogadzirwa nehurongwa mukupindura kupinda iyo show ip protocols command. Isu tinoona Routing Information Sources, inoratidzwa semitsara ine IP kero uye yekutonga kureba. Kusiyana neOSPF ruzivo, EIGRP munyaya iyi haishandisi Router ID, asi IP kero dze routers.
Murairo wekupedzisira unobvumidza iwe kuti utarise zvakananga mamiriro eiyo interfaces kuratidza ip eigrp interfaces. Kana iwe ukapinda uyu murairo, unogona kuona ese ma router interfaces achimhanya EIGRP.
Saka, pane nzira nhatu dzekuona kuti mudziyo uri kuita EIRGP protocol.
Ngatitarisei kuenzana mutengo mutoro kuenzanisa, kana kuenzana mutoro kuenzanisa. Kana 2 mainterface aine mutengo wakafanana, kuenzanisa kwemutoro kunozoiswa kwavari nekukasira.
Ngatishandisei Packet Tracer kuona kuti izvi zvinoita sei tichishandisa network topology yatinotoziva. Rega ndikuyeuchidze kuti bandwidth uye kunonoka kukosha kwakafanana kune ese chiteshi pakati pema router anoratidzwa. Ini ndinogonesa EIGRP muoti yevose 4 routers, iyo yandinoenda muzvirongwa zvavo imwe neimwe uye kunyora mirairo config terminal, router eigrp uye network 10.0.0.0.
Ngatifungei kuti tinofanira kusarudza optimal nzira R1-R4 kuti loopback rakapotsa interface 10.1.1.1, nepo zvose mana links R1-R2, R2-R4, R1-R3 uye R3-R4 vane mari imwe chete. Kana iwe ukapinda kuratidza ip nzira yekuraira muCLI koni yerouter R1, unogona kuona kuti network 10.1.1.0/24 inogona kusvikwa nenzira mbiri: kuburikidza nerouter 10.1.12.2 yakabatana neGigabitEthernet0/0 interface, kana kuburikidza nerouter 10.1.13.3 .0 yakabatana neGigabitEthernet1/XNUMX, uye nzira mbiri idzi dzine zviyero zvakafanana.
Kana isu tikapinda iyo show ip eigrp topology command, isu tichaona iwowo ruzivo pano: 2 Vanotsiva vanogamuchira vane yakafanana FD tsika dze131072.
Kusvika pari zvino, tadzidza kuti ECLB yakaenzana nekuenzanisa kuenzanisa, izvo zvinogona kuitwa mune zvose OSPF neEIGRP.
Nekudaro, EIGRP zvakare ine kusaenzana-mutengo wemutoro kuenzanisa (UCLB), kana kusaenzana kuenzanisa. Mune zvimwe zviitiko, zviyero zvinogona kusiyana zvishoma kubva kune mumwe nemumwe, izvo zvinoita kuti migwagwa inenge yakaenzana, iyo iyo EIGRP inobvumira kuenzanisa kwekutakura kuburikidza nekushandisa kukosha kunonzi "kusiyana".
Ngatimbofungidzira kuti tine router imwe yakabatana nevamwe vatatu - R1, R2 uye R3.
Router R2 ine yakaderera kukosha FD=90, saka inoshanda seMutsivi. Ngatitarisei iyo RD yemamwe maviri chiteshi. R1's RD ye80 ishoma pane R2's FD, saka R1 inoita senge backup Feasible Successor router. Sezvo iyo RD ye router R3 yakakura kupfuura iyo FD ye router R1, haingambove Mutevedzeri Anogoneka.
Saka, isu tine router - Mutevedzeri uye router - Inogoneka Successor. Iwe unogona kuisa router R1 mutafura yekufambisa uchishandisa maitiro akasiyana-siyana. MuEIGRP, by default Variance = 1, saka router R1 seFeasible Successor haisi mutafura yekufambisa. Kana tikashandisa kukosha Kusiyana = 2, ipapo FD inokosha ye router R2 ichawedzerwa ne 2 uye ichava 180. Muchiitiko ichi, FD ye router R1 ichava shoma pane FD ye router R2: 120 <180, saka router R1 ichaiswa mutafura yekufambisa seMutsivi 'a.
Kana tikaenzanisa Variance = 3, ipapo FD kukosha kwemugamuchiri R2 ichava 90 x 3 = 270. Muchiitiko ichi, router R1 ichapindawo mutafura yekufambisa, nokuti 120 <270. Usavhiringidzika nechokwadi chokuti. router R3 haipindi mutafura pasinei nokuti iyo FD = 250 ine kukosha kweKusiyana = 3 ichava shoma pane FD ye router R2, kubva 250 <270. Ichokwadi ndechokuti kune router R3 mamiriro RD <FD Successor haisati yasangana, sezvo RD = 180 isiri pasi, asi inopfuura FD = 90. Nokudaro, sezvo R3 isingagoni kutanga kuva Mutevedzeri Anogoneka, kunyange nehuwandu hwekusiyana kwe3, haisati ichizopinda mutafura yekufambisa.
Saka, nekushandura kukosha kweKusiyana, tinogona kushandisa kusaenzana kwekutakura kuenzanisa kuti tibatanidze nzira yatinoda mutafura yekufambisa.
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Source: www.habr.com