Ko te Network Packet Broker (NPB) he taputapu whatunga rite ki te pana, ā, he rerekē te rahi mai i ngā taputapu kawe ki ngā pouaka wae 1U me te 2U ki ngā pouaka nui me ngā pūnaha papa. He rerekē ki te pana, kāore te NPB e whakarerekē i te rere o te raraunga mā roto i tētahi ara mēnā kāore i te tohutohuhia. Ka taea e te NPB te whiwhi raraunga i runga i tētahi, neke atu rānei o ngā atanga, te mahi i ētahi mahi kua tautuhia i mua i runga i taua raraunga, kātahi ka whakaputa ki tētahi, neke atu rānei o ngā atanga.
He maha ngā wā ka kiia ēnei ko ngā mahere tauranga "tētahi-ki-tētahi", "maha-ki-tētahi", me "tētahi-ki-tētahi". Ko ngā mahi ka taea te mahi mai i te māmā, pērā i te tuku whakamua, te whakakore rānei i ngā waka, ki te uaua, pērā i te tātari i ngā mōhiohio i runga ake i te paparanga 5 hei tautuhi i tētahi wātū motuhake. Ko ngā atanga i runga i te NPB he hononga taura parahi, engari he anga SFP/SFP + me te QSFP te nuinga, e āhei ai ngā kaiwhakamahi ki te whakamahi i ngā momo tere pāpāho me te whānui. Ko te huinga āhuatanga o te NPB kua hangaia i runga i te kaupapa o te whakanui ake i te whai huatanga o ngā taputapu whatunga, inā koa ko te aroturuki, te tātari, me ngā taputapu haumarutanga.
He aha ngā mahi e whakaratohia ana e te Network Packet Broker?
He maha ngā āheinga o te NPB, ā, ka rerekē pea i runga i te waitohu me te tauira o te taputapu, ahakoa me whai huinga āheinga matua ngā kaihoko mōkihi katoa. Ko te nuinga o te NPB (te NPB tino noa) ka mahi i ngā paparanga OSI 2 ki te 4.
I te nuinga o te wā, ka kitea e koe ngā āhuatanga e whai ake nei i runga i te NPB o L2-4: te whakawhiti i ngā waka (ngā wāhanga motuhake rānei), te tātari waka, te tāruatanga waka, te tango i ngā kawa, te tapahi pākete (te tapahi), te tīmata, te whakamutu rānei i ngā kawa kauhanga whatunga, me te taurite kawenga mō ngā waka. E ai ki te tumanako, ka taea e te NPB o L2-4 te tātari i te VLAN, ngā tapanga MPLS, ngā wāhitau MAC (pūtake me te ūnga), ngā wāhitau IP (pūtake me te ūnga), ngā tauranga TCP me te UDP (pūtake me te ūnga), tae atu ki ngā haki TCP, tae atu ki ngā waka ICMP, SCTP, me te ARP. Ehara tēnei i te āhuatanga hei whakamahi, engari ka whakarato i tētahi whakaaro mō te āhua o te mahi a te NPB i ngā paparanga 2 ki te 4 ki te wehewehe me te tautuhi i ngā huinga waka. Ko tētahi whakaritenga matua me rapu e ngā kiritaki i roto i te NPB ko tētahi papa tuara kore-ārai.
Me āhei te Kaiwhakahaere Mōkihi Whatunga ki te whakatutuki i te katoa o te rerenga raraunga o ia tauranga i runga i te taputapu. I roto i te pūnaha anga, me āhei hoki te hononga ki te papa o muri ki te whakatutuki i te kawenga rerenga raraunga katoa o ngā kōwae hono. Mēnā ka whakatakahia e te NPB te mōkihi, kāore ēnei taputapu e tino mārama ki te whatunga.
Ahakoa ko te nuinga o te NPB e ahu mai ana i te ASIC, i te FPGA rānei, nā te tino pono o te mahi tukatuka mōkihi, ka kitea e koe he maha ngā whakaurunga, ngā CPU rānei e whakaaetia ana (mā ngā kōwae). Ko ngā Mylinking™ Network Packet Brokers (NPB) e ahu mai ana i te otinga ASIC. He āhuatanga tēnei e whakarato ana i te tukatuka ngāwari, nō reira kāore e taea te mahi i roto i te taputapu anake. Kei roto i ēnei ko te tango tārua mōkihi, ngā tohu wā, te wetewete SSL/TLS, te rapu kupumatua, me te rapu kīanga auau. He mea nui kia mōhio ko tana mahi e whakawhirinaki ana ki te mahi a te CPU. (Hei tauira, ko ngā rapu kīanga auau o te tauira kotahi ka puta he hua mahi tino rerekē i runga i te momo waka, te tere taurite, me te whānui o te hononga), nō reira ehara i te mea ngāwari ki te whakatau i mua i te whakatinanatanga tuturu.
Mena ka whakahohea ngā āhuatanga e pā ana ki te PTM, ka noho hei āhuatanga whakawhāiti i te mahi whānui o te NPB. Ko te taenga mai o te PTM me ngā maramara whakawhiti ka taea te whakarite, pērā i a Cavium Xpliant, Barefoot Tofino me Innovium Teralynx, i hanga hoki i te pūtake o tētahi huinga āheinga whānui mō ngā kaihoko mōkihi whatunga o te whakatupuranga e whai ake nei. Ka taea e ēnei wae mahi te whakahaere i ngā waka i runga ake i te L4 (e kiia ana ko ngā kaihoko mōkihi L7). I roto i ngā āhuatanga matatau kua whakahuatia i runga ake nei, ko te rapu kupumatua me te rapu kīanga auau he tauira pai o ngā āheinga o te whakatupuranga e whai ake nei. Mā te āheinga ki te rapu i ngā kawenga mōkihi ka whakaratohia he whai wāhitanga ki te tātari i ngā waka i ngā taumata wātū me ngā tono, ā, ka whakaratohia he mana whakahaere pai ake i runga i tētahi whatunga e whanake ana i te L2-4.
He pēhea te uru o te Network Packet Broker ki roto i te hanganga?
E rua ngā huarahi e taea ai te tāuta i te NPB ki roto i tētahi hanganga whatunga:
1- I roto i te raina
2- Kei waho o te roopu.
He painga, he ngoikoretanga hoki tō ia huarahi, ā, ka taea te whakahaere i ngā waka i ngā huarahi e kore e taea e ētahi atu huarahi. He waka whatunga wā-tūturu tō te kaihokohoko mōkihi whatunga ā-roto e whakawhiti ana i te taputapu i tōna huarahi ki tōna ūnga. Mā tēnei ka whai wāhi ki te whakahaere i ngā waka i te wā-tūturu. Hei tauira, i te wā e tāpiri ana, e whakarerekē ana, e muku ana rānei i ngā tohu VLAN, e whakarerekē ana rānei i ngā wāhitau IP ūnga, ka tāruatia ngā waka ki tētahi hononga tuarua. Hei tikanga ā-roto, ka taea hoki e te NPB te whakarato i te tauutuutu mō ētahi atu taputapu ā-roto, pērā i te IDS, te IPS, ngā pareā ahi rānei. Ka taea e te NPB te aroturuki i te tūnga o aua taputapu me te huri i te waka ki te tūtatari wera mēnā ka rahua.
He tino ngāwari te tukatuka me te tārua i ngā waka ki ngā taputapu aroturuki me te haumarutanga maha, me te kore e pā ki te whatunga wā-tūturu. Ka whakaratohia hoki e ia he tirohanga whatunga kāore i kitea i mua, ā, ka whakarite kia whiwhi ngā taputapu katoa i tētahi tārua o ngā waka e hiahiatia ana hei whakahaere tika i ā rātou kawenga. Ehara i te mea ka whakarite noa kia whiwhi āu taputapu aroturuki, haumarutanga, me te tātari i ngā waka e hiahiatia ana e rātou, engari kia haumaru hoki tō whatunga. Ka whakarite hoki kia kore te taputapu e pau ngā rauemi i runga i ngā waka kāore e hiahiatia. Kāore pea tō kaitātari whatunga e hiahia ki te tuhi i ngā waka tārua nā te mea he nui te wāhi kōpae e pau ana i te wā o te tārua. Ka taea te tātari ngāwari i ēnei mea mai i te kaitātari i te wā e tiaki ana i ngā waka katoa mō te taputapu. Tērā pea he whatunga iti katoa tāu e hiahia ana koe kia huna mai i tētahi atu pūnaha; anō, ka taea te tango ngāwari i tēnei i runga i te tauranga putanga kua tohua. Inaa, ka taea e tētahi NPB kotahi te tukatuka i ētahi hononga waka i roto i te raina i te wā e tukatuka ana i ētahi atu waka i waho o te roopu.
Wā tuku: Maehe-09-2022
