Abin da IPv6CP ke tattaunawa, da abin da har yanzu yake bukatar prefix
Adireshin link-local a kan mu'amalar PPP mataki ne na saiti, ba hanyar shiga IPv6 ba. Raba musayar gane-gane daga prefix, hanyoyi da haɗin abokin ciniki.
IPv6 yana tashi a kan mu'amalar PPP, adireshin link-local ya bayyana, kuma an ayyana canjin ya ƙare. Sa'an nan babu abin da ake turawa, babu adireshin duniya, kuma gwaji zuwa wani wuri na jama'a ya kasa yayin da mu'amalar ke kama da an saita. Hanyar ta tashi; cibiyar sadarwar ba ta taɓa ba. Yi gwaje-gwajen huɗu da ke ƙasa bisa tsari kuma tsaya a wanda ya bayyana gibin.
Abin da adireshin link-local ke tabbatarwa da gaske
IPv6CP yana tayar da IPv6 a kan hanyar PPP kuma yana tattauna alamar mu'amala ga kowane gefe. Wannan alamar tana samar da adireshin link-local, wanda ya isa yin magana da abokin tarayya a kan hanyar kuma bai isa ya kai wani abu ba. Adireshin yana tabbatar da cewa hanyar ta shirya don IPv6, kuma ba ya tabbatar da komai game da cibiyar sadarwar da ke bayan abokin tarayya. Karanta shi a matsayin adireshin shiga shine kuskuren da yawancin waɗannan binciken ke farawa da shi.
Tambayoyin huɗu da ke ƙasa suna raba abin da matakin hanyar ke yankewa daga abin da sabis ɗin zai bayar. Amsa su bisa tsari, domin ba za a iya amsa tambaya ta baya ba yayin da ta farko ke buɗe.
| Question | Answered by | What it does not settle |
|---|---|---|
| Is IPv6 up on the link? | IPv6CP: interface identifiers, then link-local addresses | Any address reachable beyond the peer |
| Where does a global prefix come from? | Router advertisement, delegated prefix, DHCPv6 or static configuration | IPv6CP carries no prefix of its own |
| Who owns the routes? | The client's tunnel configuration and the server's return path | A link-local address implies no route at all |
| How does this client get configured? | Explicit tunnel settings or router advertisements, depending on the client | The standard does not choose for the implementation |
Daga ina prefix ɗin zai zo
Adireshin duniya yana bukatar prefix daga wani wuri: sanarwar router, prefix da aka wakilta, DHCPv6 ko saitin ajiye. IPv6CP ba ya ɗaukar ɗaya, kuma babu irin jira a kan hanyar da zai samar da ɗaya. RFC 5072 ya sanya IPv6CP a matsayin matakin saiti da ke gudana kafin wasu ka'idojin IPv6 su yi aiki a kan hanyar, kuma wannan shine dukan iyakarsa: shirya hanyar, ba lissafin cibiyar sadarwa ba. Bayar da prefix ɗin kuma mu'amalar za ta fara ɗaukar zirga-zirga maimakon kasancewa kawai.
Sanarwar router ita ce amsa da aka saba a LAN kuma mafi ƙarancin aminci a cikin tunnel na batu-zuwa-batu, domin abokin ciniki dole ya aika buƙatu kuma ya karɓi amsar. Wasu abokan cinikin tunnel ba sa yin ko ɗaya. Duba abin da abokin ciniki ya yarda ya karɓa kafin ka yanke shawarar cewa uwar garke ya aika shi.
Irin wannan prefix ɗin dole ya zama mai isa daga ɗayan gefen. Abokin ciniki da ke da adireshin duniya amma ba shi da hanyar dawowa an saita shi, ba a haɗa shi ba.
Hanyoyi alkawari ne daban
Ko da da adireshi, abokin ciniki ya san waɗanne wurare suka shiga tunnel ɗin, kuma uwar garke tana bukatar hanyar dawowa ga waɗannan wuraren. Waɗannan shawarwari biyu ne da aka yanke a wurare biyu. Tunnel da ke ɗaukar dukan zirga-zirgar IPv6 yana bukatar hanyar da aka saba a kan abokin ciniki da hanyar dawowa a kan uwar garke; rabuwar tunnel yana bukatar ɓangarorin biyu su amince da lissafin prefix ɗaya. Idan ba su yarda ba, zirga-zirgar tana fita kuma ba ta dawowa.
Rubuta lissafin kafin ka saita komai. Idan shirin ya ce prefix ɗin kamfani ne kawai ke wucewa ta tunnel ɗin, bai kamata abokin ciniki ya sami hanyar IPv6 ta al'ada ba, kuma bai kamata uwar garke ta sanar da ita ba.
Haɗin abokin ciniki ne ke yanke sauran
Wasu abokan cinikin tunnel suna saita IPv6 a fili. Misali, Network Extension na Apple yana ɗaukar adireshi, prefix da jerin hanyoyi don tunnel ɗin, don haka aikace-aikacen da ke amfani da shi ba ya jira sanarwa irin ta Ethernet. Wasu suna dogara da sanarwar router da ke zuwa a kan hanyar. Dukansu sun halatta kuma suna bukatar halin uwar garke daban, don haka zaɓin da ba daidai ba yana samar da abokin ciniki da ke jira har abada saƙon da babu wanda ke aika. Gano tsarin kafin ka canza uwar garke.
Tsohon sunan mu'amala kamar ppp0 ba ya tabbatar da komai game da tari da ke gudana a yau. Abokin ciniki na yau zai iya amfani da API na tunnel na fakiti maimakon mu'amalar PPP, kuma ɗauka cewa yana aiki kamar haɗin tari shine yadda ake karya tsari mai aiki. Tambayi sigar abokin ciniki da hanyar samarwa, ba sunan mu'amala ba.
Rubuta shirin da abokin ciniki ke bukata
Cikakken bayani ya ƙunshi abubuwa uku: wane adireshi abokin ciniki ke da shi, waɗanne wurare tunnel ɗin zai ɗauka, da yadda cibiyar sadarwa ke aika amsoshi baya. Adireshin link-local ba ya amsa ɗaya daga cikinsu, kuma sanarwar da aka karɓa tana amsa wani ɓangare na ɗaya kawai. Bincika kowane abu daban maimakon karɓar alama mai kore. Sannan rubuta wace hanya ce ta bayar da kowace amsa, domin wannan rikodin yana mai da rahoton IPv6 na gaba dubawa na minti biyu.
Ka riƙe rikodin tare da takardun sabis ɗin kuma sabunta shi idan abokin ciniki ya canza. Shirin da ya yi daidai ga abokin cinikin PPP zai iya zama kuskure ga abokin cinikin tunnel na fakiti a kan wannan sabis ɗin. Tambayoyin huɗu suna nan iri ɗaya; amsoshi ne kawai ke motsawa.