Yog tias peb siv cov lus piv txwv zoo tshaj plaws, kev ua haujlwm ntawm kev hloov pauv yog faib lub network chaw nres nkoj rau hauv ntau lub network ports rau cov ntaub ntawv xa mus, ib yam li hloov dej los ntawm ib lub kav dej mus rau ntau lub kav dej rau ntau tus neeg siv.
Cov "dej ntws" xa mus rau hauv lub network yog cov ntaub ntawv, uas yog tsim los ntawm ib tug neeg cov ntaub ntawv packets.Qhov hloov pauv yuav tsum tau ua tiav txhua pob ntawv, yog li qhov bandwidth ntawm qhov hloov pauv rov qab yog lub peev xwm siab tshaj plaws rau kev sib pauv cov ntaub ntawv, thiab cov pob ntawv xa tawm tus nqi yog lub peev xwm ua tau txais cov ntaub ntawv thiab tom qab ntawd xa mus.
Qhov loj dua qhov tseem ceeb ntawm kev hloov pauv backplane bandwidth thiab pob ntawv xa mus, cov ntaub ntawv muaj peev xwm ua tau zoo dua, thiab tus nqi ntau dua ntawm kev hloov.
Backplane bandwidth:
Backplane bandwidth tseem hu ua backplane peev, uas txhais tau tias yog qhov siab tshaj plaws ntawm cov ntaub ntawv uas tuaj yeem ua haujlwm los ntawm kev ua haujlwm interface, daim npav interface thiab cov ntaub ntawv tsheb npav ntawm qhov hloov.Nws sawv cev rau tag nrho cov ntaub ntawv pauv peev xwm ntawm kev hloov, hauv Gbps, hu ua hloov pauv bandwidth.Feem ntau, qhov backplane bandwidth peb tuaj yeem nkag tau los ntawm ob peb Gbps mus rau ob peb puas Gbps.
Packet forwarding tus nqi:
Cov pob ntawv xa tawm tus nqi ntawm kev hloov pauv, tseem hu ua chaw nres nkoj hla, yog lub peev xwm ntawm kev hloov mus rau cov pob ntawv xa mus rau ib qho chaw nres nkoj, feem ntau hauv pps, hu ua pob ntawv ib ob, uas yog tus naj npawb ntawm pob ntawv xa mus rau ib ob.
Ntawm no yog ib qho kev nkag siab zoo hauv lub network: Cov ntaub ntawv network tau kis los ntawm cov ntaub ntawv pob khoom, uas suav nrog cov ntaub ntawv xa mus, cov kab ntawv kab lus, thiab cov kab sib txawv.Qhov tsawg kawg nkaus yuav tsum tau rau ib pob ntawv cov ntaub ntawv nyob rau hauv lub network yog 64 bytes, qhov twg 64 bytes yog cov ntaub ntawv ntshiab.Ntxiv 8-byte thav duab header thiab 12-byte thav duab sib txawv, pob ntawv me tshaj plaws hauv lub network yog 84 bytes.
Yog li thaum tag nrho duplex gigabit interface nce mus txog kab nrawm, pob ntawv xa tawm tus nqi yog
= 1000Mbps/((64+8+12) * 8bit)
= 1,488 mpps.
Kev sib raug zoo ntawm ob:
Qhov bandwidth ntawm qhov hloov pauv rov qab nruab nrab yog tag nrho cov ntaub ntawv sib pauv peev xwm ntawm qhov hloov pauv thiab tseem yog ib qho tseem ceeb qhia txog pob ntawv xa mus.Yog li lub backplane tuaj yeem nkag siab zoo li lub tsheb npav hauv computer, thiab qhov siab dua lub backplane, nws cov ntaub ntawv muaj peev xwm ua tau zoo dua, uas txhais tau hais tias ntau dua cov pob ntawv xa mus.
Post lub sij hawm: Lub Xya hli ntuj-17-2023