Kuskuren daidaitawa na BGP yana sa Cloudflare ya fadi na mintuna 27

Kamfanin Cloudflare, bayarwa hanyar sadarwar isar da abun ciki don albarkatun Intanet miliyan 27 da kuma yin hidimar zirga-zirgar 13% na manyan shafuka 1000, gano cikakkun bayanai game da lamarin, sakamakon haka ayyukan da dama na cibiyar sadarwa ta Cloudflare ya katse tsawon mintuna 27, ciki har da wadanda ke da alhakin isar da ababen hawa zuwa London, Chicago, Los Angeles, Washington, Amsterdam, Paris, Moscow da St. Petersburg. . Matsalar ta samo asali ne ta hanyar canjin sanyi mara daidai akan na'ura mai ba da hanya tsakanin hanyoyin sadarwa na Atlanta. A lokacin lamarin, wanda ya faru a ranar 17 ga Yuli daga 21:12 zuwa 21:39 (UTC), jimlar yawan zirga-zirgar ababen hawa a cibiyar sadarwar Cloudflare ya ragu da kusan 50%.

A lokacin aikin fasaha, ana son cire wani ɓangare na zirga-zirga daga ɗayan kashin baya, injiniyoyi sun share layi ɗaya a cikin toshe saitunan da ke bayyana jerin hanyoyin da aka karɓa ta hanyar kashin baya, an tace daidai da ƙayyadaddun jerin prefixes. Da yayi dai dai a kashe gaba dayan toshe, amma bisa kuskure layin da ke da jerin prefixes ne kawai aka share.

{master[edit] atl01# nuni | kwatanta
[gyara manufofin-zabukan manufofin-bayani 6-BBONE-OUT 6-SITE-LOCAL daga]! mara aiki: prefix-jerin 6-SITE-LOCAL {… }

Toshe abun ciki:

daga {
prefix-jerin 6-SITE-LOCAL;
}
sannan {
zaɓi na gida 200;
al'umma suna ƙara SHAFIN-LOCAL-HANYA;
al'umma ƙara ATL01;
al'umma suna ƙara AREWA-AMERICA;
karba;
}

Saboda cire daurin da aka yi a cikin jerin prefixes, an fara rarraba ragowar ɓangaren toshe zuwa duk prefixes kuma na'ura mai ba da hanya tsakanin hanyoyin sadarwa ya fara aika duk hanyoyin BGP zuwa masu amfani da sauran kasusuwa. Ta hanyar daidaituwa, sabbin hanyoyin suna da fifiko mafi girma (fificin gida 200) idan aka kwatanta da fifiko (100) da aka saita don wasu hanyoyin ta tsarin inganta zirga-zirga ta atomatik. Sakamakon haka, maimakon cire hanyar sadarwa daga kashin baya, hanyoyin da BGP suka fi ba da fifiko, sakamakon haka an aika da zirga-zirga zuwa wasu kasusuwa zuwa Atlanta, wanda ya haifar da wuce gona da iri na na'ura mai ba da hanya tsakanin hanyoyin sadarwa da rugujewar wani bangare na hanyar sadarwa.

Domin hana faruwar irin wannan lamari a nan gaba, ana shirin yin sauye-sauye da dama ga saitunan kashin baya na Cloudflare ranar Litinin. Za a ƙara iyaka akan matsakaicin adadin prefixes (mafi girman-prefix) don zaman BGP, wanda zai toshe ƙashin baya mai matsala idan an ci gaba da fakewa da yawa ta hanyarsa. Idan an ƙara wannan ƙuntatawa a baya, matsalar da ake magana a kai ta haifar da rufe kashin baya a Atlanta, amma ba zai shafi aikin gabaɗayan cibiyar sadarwa ba, tun da an tsara hanyar sadarwar Cloudflare don ba da damar kashin baya na kowane mutum. Daga cikin sauye-sauyen da aka riga aka karɓa, an lura da sake fasalin abubuwan da suka fi dacewa (fifin gida) don hanyoyin gida, wanda ba zai ƙyale mai ba da hanya tsakanin hanyoyin sadarwa ya rinjayi zirga-zirga a wasu sassan cibiyar sadarwa ba.

source: budenet.ru