I-Huawei QinQ kuya ku-VSI: Hlola Isitaki Somaka Ngaphambi Kokuhlela

Ukwehluleka okubili kwenza ama-handoffs amaningi e-QinQ aphukile abe yi-VSI, futhi ayikho neyodwa ebonakala njengesixhumi esibonakalayo esiphansi. Kungenzeka ukuthi imbobo ye-ingress idla umaka wekhasimende ngaphambi kokuthi ukuhlukaniswa kubonwe, noma isifunda sokunamathiselwe siboshelwe ku-VSI leyo isiphetho esikude esingakaze siyijoyine. Kusukela ohlangothini lwekhasimende okubili kubukeka kufana: isekethe ibika phezulu futhi akukho siphambano sozimele. Sebenza ngamasheke amane angezansi ngokulandelana, bese ume kwesokuqala lapho ifremu oyibukayo ihluke kuhlaka olubhale phansi.

Bhala isitaki somaka phansi ngaphambi kokuthi uthinte idivayisi

Khetha isevisi eyodwa emele futhi uyichaze njengozimele, hhayi njengokucushwa. Ngesevisi egcina ama-VLAN ekhasimende angu-100 no-200 ngaphakathi komhlinzeki we-VLAN 900, inkontileka imfushane: ozimele bokungena baphatha ithegi yekhasimende eyodwa, umhlinzeki wengeza ithegi yesevisi eyodwa, futhi umaka wekhasimende usinda engathintwa ngaphansi.

customer to provider:  [ C-tag 100 | payload ]
provider inside:       [ S-tag 900 ][ C-tag 100 | payload ]
provider to customer:  [ C-tag 100 | payload ]

Bhala isiqondiso sokubuyisela futhi, ngoba inkontileka echaza kuphela ukungena kuzophumelela ukuhlolwa kwendlela eyodwa futhi yehlule ekukhiqizeni. Isiphetho esikude kufanele sinikeze ikhasimende uhlaka olulindelwe yikhasimende, okusho ukuthi ukusebenza kwalo kwe-pop kufanele kube ukuphambana ncamashi kokuphusha kwakho. Noma yini engalingani kuleyo ncazelo yisinqumo somklamo ongakenzi.

Hlola ukufana kokungena kuqala

Ukuhlelwa kwenzeka ngaphambi kwanoma yikuphi ukusebenza komaka, futhi kungafana nalokho okufikayo. Qinisekisa ukuthi imbobo ilungiselelwe njengokufinyelela, isiqu noma ingxubevange, iluphi uhlobo lozimele olwamukelayo, kanye nalokho okwenziwa isihlonzi sembobo se-VLAN kuzimele ongamakiwe. Embobeni yokufinyelela umaka wekhasimende uyasuswa lapho ufika, ngakho umthetho wakamuva ofana ne-C-tag 100 awunalutho oluzofana futhi isevisi ijoyina isizinda sokusakaza esingalungile ngaphandle kwephutha.

Ukuthwebula ohlangothini lomhlinzeki kulungisa lokhu ngemizuzwana: uhlaka lwe-QinQ olufakwe kusigaba esilungile lubonisa omaka ababili, kanye nohlaka olumakiwe olulodwa lapho lusho ukuthi umaka wangaphakathi udliwe.

Hlola ukuthi isenzo sikamaka senzani ngempela

Ukupakisha nokuhumusha kuyimisebenzi ehlukene futhi izinkundla ziziveza njengezinto ezihlukene. Ukupakisha kuphusha ithegi yangaphandle futhi kushiye engaphakathi yodwa, okuyilokho okudingwa yinkontileka engenhla. Ukuhumusha kubhala kabusha ithegi eyodwa kwenye, okuwumklamo ovumelekile kodwa okhiqiza uhlaka oluhlukile ocingweni. Eminye imindeni idinga futhi ukuthi i-QinQ inikwe amandla ngokusobala embobeni ngaphambi kokuthi kusebenze umthetho wokunqwabelanisa, futhi i-TPID yangaphandle ingase ilungiseke phakathi kwamanani angu-802.1Q nangu-802.1ad.

Indlela yokubuya idinga ukunakwa okulinganayo. Uma umthetho we-egress uveza umaka wangaphandle kusixhumi esingaphansi esisodwa kodwa isixhumi esingaphansi esihlukile siphethe impendulo engenawo umthetho ofanayo, ikhasimende libona ukuthunyelwa okusebenzayo futhi ukwamukela okufile.

Hlola ukubophezela kwesevisi, hhayi inombolo yesixhumi esibonakalayo

I-VSI ikhonjwa ngesevisi yayo kanye nezihlonzi ze-virtual-circuit, futhi untanga kufanele asebenzise amanani afanayo ngaphambi kwamafomu e-pseudowire. Isekhethi yokunamathisela ibe isibophezela leyo VSI embotsheni ethile kanye ne-VLAN, okuyisitatimende esihlukile kunomthetho ohlukanise uhlaka. Inombolo ye-subinterface ebukeka ilungile ayifaki lutho mayelana nokubophezela.

Hlola isimo se-pseudowire kanye nesimo sokunamathiselwe-sesekethe ngokuhlukene, bese uhlola iseshini yokusayina ephethe i-pseudowire. Okubili kwalokhu okuthathu kungaba nempilo kuyilapho okwesithathu kungekho, kanti lena ephansi ikutshela ukuthi yiluphi uhlangothi okufanele ulungise.

Ukuzihlukanisa kuyisithembiso esihlukile. Ukugcina amathegi ekhasimende eqinile ngaphakathi kwe-VSI eyodwa akuhlukanisi amakhasimende komunye nomunye, ngoba ukufunda kwe-MAC kuthatha sonke isikhathi; uma inkontileka ithi ukuzihlukanisa, idinga izimo ezihlukene noma inqubomgomo ecacile ye-VLAN ngayinye.

Hlola isabelomali sikasayizi bese ufakazela inkontileka

Ithegi yangaphandle yengeza amabhayithi amane, futhi i-pseudowire encapsulation ingeza isitaki ngelebula futhi ngokunokwenzeka igama lokulawula phezu kwalokho. Kufake konke kusabelomali se-MTU ne-MRU kuwo womabili amadivaysi onqenqema lwabahlinzeki, futhi ungacimi igama lokulawula ukuze uthulise isexwayiso sikasayizi, njengoba isiphetho esikude singasidinga. Gcina indlela yokuphatha engancikile kusevisi oyishintshayo.

Bese uhlola amakesi amathathu kokunamathiselwe kwekhasimende: elokuqala elivunyiwe i-C-VLAN kuzo zombili izinkomba, elesibili lavuma i-C-VLAN, kanye ne-VLAN ethi inkontileka kufanele yenqatshwe. Qaphela ozimele kunokufunda izimo zokusebenzelana, bese uphinda ngemva kwanoma yiluphi ushintsho kumthetho womaka.

I-VSI ekhuphukayo ithi kuphela i-pseudowire eyenziwe. Ayisho lutho ngokuthi uhlaka oluphambanayo luwuhlaka ikhasimende elilukhokhele yini.