[AipuWaton] Chidziwitso Chofunikira cha Network Engineers: Mastering Core Switches

Kodi mawaya 8 mu chingwe cha Ethernet amachita chiyani?

Pankhani ya uinjiniya wa netiweki, kumvetsetsa kusintha koyambira ndikofunikira kuti muwonetsetse kusungidwa kwa data moyenera komanso kulumikizana mopanda msoko. Kusintha kwa ma Core kumagwira ntchito ngati msana wa netiweki, kumathandizira kusamutsa deta pakati pa ma sub-network osiyanasiyana. Nkhaniyi ikufotokoza mfundo zisanu ndi imodzi zoyambira zomwe injiniya aliyense wa netiweki amayenera kuzimvetsetsa kuti apititse patsogolo kugwiritsa ntchito ma switch oyambira ndikuwongolera magwiridwe antchito a netiweki.

Kumvetsetsa Bandwidth ya Backplane

Backplane bandwidth, yomwe imatchedwanso switching capacity, ndiye kuchuluka kwa data pakati pa purosesa yosinthira mawonekedwe ndi basi ya data. Tangoganizani ngati kuchuluka kwa misewu panjira yodutsa-njira zambiri zikutanthauza kuti magalimoto ambiri amatha kuyenda bwino. Popeza kuti mauthenga onse a padoko amadutsa mumsewu wakumbuyo, bandwidth iyi nthawi zambiri imakhala ngati cholepheretsa panthawi yomwe anthu ambiri ali ndi magalimoto. Kuchuluka kwa bandwidth, deta yochulukirapo imatha kugwiridwa nthawi imodzi, zomwe zimapangitsa kusinthanitsa kwachangu kwa data. Mosiyana ndi zimenezi, bandwidth yochepa idzachepetsa kukonzanso deta.

Fomula Yofunikira:
Bandwidth ya Ndege yakumbuyo = Chiwerengero cha Madoko × Mtengo wa Port × 2

Mwachitsanzo, chosinthira chokhala ndi madoko 24 omwe amagwira ntchito pa 1 Gbps chingakhale ndi bandwidth yakumbuyo ya 48 Gbps.

Mitengo Yotumizira Paketi ya Layer 2 ndi Layer 3

Deta mu netiweki imakhala ndi mapaketi angapo, iliyonse imafunikira zothandizira kuti zisinthidwe. Mtengo wotumizira (kupititsa) umasonyeza kuti ndi mapaketi angati omwe angagwiridwe mkati mwa nthawi yeniyeni, osaphatikizapo kutayika kwa paketi. Muyezo uwu ndi wofanana ndi kuchuluka kwa magalimoto pa mlatho ndipo ndi gawo lofunikira kwambiri pakusinthira masiwichi 3.

Kufunika Kwa Kusintha Kwa Line-Liwiro:
Kuti athetse zopinga za netiweki, masiwichi amayenera kukwaniritsa kusintha kwa liwiro la mzere, kutanthauza kuti kusintha kwawo kumafanana ndi kuchuluka kwa data yomwe yatuluka.

Kuwerengetsera:
Kudutsa (Mpps) = Chiwerengero cha 10 Gbps Madoko × 14.88 Mpps + Chiwerengero cha 1 Gbps Madoko × 1.488 Mpps + Chiwerengero cha 100 Mbps Madoko × 0.1488 Mpps.

Kusintha kokhala ndi madoko a 24 1 Gbps kuyenera kufikira 35.71 Mpps kuti athandizire kusinthana kwamapaketi osatsekereza bwino.

Scalability: Kukonzekera Tsogolo

Scalability imaphatikizapo mbali ziwiri zazikulu:

Chiwerengero cha Slot

Kuchuluka kwa mipata mu switch kumatsimikizira kuti ndi ma module angati ogwira ntchito ndi mawonekedwe omwe angayikidwe. Gawo lililonse limakhala ndi kagawo, motero kuchepetsa kuchuluka kwa madoko omwe switchyo imatha kuthandizira.

Mitundu ya module

Mitundu yosiyanasiyana yothandizidwa ndi ma module (mwachitsanzo, LAN, WAN, ATM) imathandizira kusintha kwa ma switch kuti igwirizane ndi zofunikira zosiyanasiyana za netiweki. Mwachitsanzo, ma module a LAN ayenera kukhala ndi mitundu yosiyanasiyana monga RJ-45 ndi GBIC kuti akwaniritse zosowa zosiyanasiyana zapaintaneti.

Kusintha kwa Layer 4: Kupititsa patsogolo Magwiridwe Antchito

Kusintha kwa Layer 4 kumathandizira mwayi wopeza mautumiki apaintaneti poyesa osati ma adilesi a MAC kapena ma adilesi a IP, komanso manambala adoko a TCP/UDP. Zopangidwa makamaka kuti zigwiritsidwe ntchito pa intaneti zothamanga kwambiri, kusintha kwa gawo 4 sikumangowonjezera kusanja komanso kumapereka maulamuliro kutengera mtundu wa ntchito ndi ID ya ogwiritsa ntchito. Izi zimayika masinthidwe a 4 ngati maukonde abwino otetezedwa motsutsana ndi mwayi wosaloledwa wa maseva ovuta.

Kusintha kwa Module: Kuonetsetsa Kudalirika

Redundancy ndiyofunikira pakusunga netiweki yolimba. Zida zama netiweki, kuphatikiza zosinthira zazikulu, ziyenera kukhala ndi kuthekera kocheperako kuti muchepetse nthawi yopumira pakalephereka. Zigawo zofunika, monga ma modules oyang'anira ndi mphamvu, ziyenera kukhala ndi zosankha za failover kuti zitsimikizire kuti ntchito zapaintaneti zokhazikika.

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Njira Zowonongeka: Kulimbikitsa Kukhazikika kwa Network

Kukhazikitsa ma protocol a HSRP ndi VRRP kumatsimikizira kusanja bwino kwa katundu ndi zosunga zobwezeretsera pazida zazikulu. Kukachitika kulephera kwa switch mkati mwa kukhazikitsa koyambira kapena kophatikizana kophatikizana kophatikizana, dongosololi limatha kusintha mwachangu kupita ku zosunga zobwezeretsera, kuwonetsetsa kuti kulibenso ntchito komanso kusunga umphumphu wa maukonde.

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Mapeto

Kuphatikizira zidziwitso zakusintha kwapaintaneti mu repertoire yanu yaumisiri wa netiweki kumatha kupititsa patsogolo magwiridwe antchito anu ndikuwongolera magwiridwe antchito a netiweki. Pozindikira malingaliro monga bandwidth ya backplane, mitengo yotumizira paketi, scalability, masinthidwe a 4, redundancy, ndi ma protocol, mumadziyika patsogolo pamapindikira m'dziko lomwe likuyendetsedwa ndi data.

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Nthawi yotumiza: Jan-16-2025