Nyob rau lub caij nyoog ntawm cov tes hauj lwm ceev ceev thiab cov khoom siv hauv huab, kev saib xyuas cov tsheb khiav hauv network tiag tiag, ua haujlwm tau zoo tau dhau los ua lub hauv paus ntawm kev ua haujlwm IT txhim khu kev qha. Raws li cov tes hauj lwm nthuav dav los txhawb 10 Gbps + txuas, cov ntawv thov ntim khoom, thiab cov qauv faib tawm, cov txheej txheem saib xyuas cov tsheb khiav ib txwm muaj - xws li kev ntes pob ntawv tag nrho - tsis ua tau lawm vim lawv cov peev txheej siab. Qhov no yog qhov uas sFlow (sampled Flow) los ua si: ib qho kev sib txuas lus telemetry network sib xws, tsim los muab kev pom dav dav rau hauv cov tsheb khiav hauv network yam tsis muaj cov khoom siv network puas tsuaj. Hauv cov blog no, peb yuav teb cov lus nug tseem ceeb tshaj plaws txog sFlow, los ntawm nws cov lus txhais yooj yim mus rau nws cov haujlwm ua haujlwm hauv Network Packet Brokers (NPBs).
1. sFlow yog dab tsi?
sFlow yog ib qho kev tswj xyuas kev khiav tsheb hauv network uas qhib thiab raws li tus qauv kev lag luam uas Inmon Corporation tau tsim, txhais hauv RFC 3176. Txawm hais tias nws lub npe yuav qhia li cas los xij, sFlow tsis muaj lub tswv yim "kev taug qab ntws" - nws yog ib qho thev naus laus zis telemetry uas sau thiab xa cov ntaub ntawv khiav tsheb hauv network mus rau lub chaw sau rau kev tshuaj xyuas. Tsis zoo li cov txheej txheem stateful zoo li NetFlow, sFlow tsis khaws cov ntaub ntawv ntws ntawm cov khoom siv network; hloov chaw, nws ntes cov qauv me me, sawv cev ntawm cov tsheb khiav thiab cov khoom siv suav, tom qab ntawd xa cov ntaub ntawv no mus rau tus neeg sau rau kev ua tiav.
Hauv nws lub hauv paus, sFlow yog tsim los rau kev nthuav dav thiab kev siv cov peev txheej tsawg. Nws tau muab tso rau hauv cov khoom siv network (switches, routers, firewalls) ua tus neeg sawv cev sFlow, ua rau muaj kev saib xyuas lub sijhawm tiag tiag ntawm cov kev sib txuas ceev ceev (txog li 10 Gbps thiab dhau ntawd) yam tsis muaj kev puas tsuaj rau kev ua haujlwm ntawm cov khoom siv lossis kev xa tawm hauv network. Nws cov qauv kev cai ua kom muaj kev sib raug zoo ntawm cov neeg muag khoom, ua rau nws yog qhov kev xaiv thoob ntiaj teb rau cov chaw sib txawv hauv network.
2. sFlow Ua Haujlwm Li Cas?
sFlow ua haujlwm ntawm ib qho yooj yim, ob-component architecture: sFlow Agent (embedded nyob rau hauv network devices) thiab sFlow Collector (ib lub centralized server rau data aggregation thiab analytics). Cov workflow revolves nyob ib ncig ntawm ob lub tseem ceeb sampling mechanisms—packet sampling thiab counter sampling—thiab data export, raws li qhia hauv qab no:
2.1 Cov Cheebtsam Tseem Ceeb
- sFlow Agent: Ib qho software module uas ua rau hauv cov khoom siv network (piv txwv li, Cisco switches, Huawei routers). Nws yog lub luag haujlwm rau kev sau cov qauv tsheb khiav thiab cov ntaub ntawv counter, encapsulating cov ntaub ntawv no rau hauv sFlow Datagrams, thiab xa lawv mus rau tus collector ntawm UDP (qhov chaw nres nkoj 6343).
- sFlow Collector: Ib lub tshuab centralized (lub cev lossis virtual) uas tau txais, txheeb xyuas, khaws cia, thiab tshuaj xyuas sFlow Datagrams. Tsis zoo li NetFlow collectors, sFlow collectors yuav tsum tswj cov raw packet headers (feem ntau yog 60–140 bytes ib qho qauv) thiab txheeb xyuas lawv kom rho tawm cov kev nkag siab tseem ceeb - qhov kev ywj pheej no tso cai rau kev txhawb nqa rau cov pob ntawv tsis yog tus qauv xws li MPLS, VXLAN, thiab GRE.
2.2 Cov Txheej Txheem Sampling Tseem Ceeb
sFlow siv ob txoj kev kuaj sib txuas ua ke los sib npaug qhov pom kev thiab kev siv cov peev txheej zoo:
1- Kev Kuaj Pob Khoom: Tus Neeg Sawv Cev yuav kuaj cov pob khoom tuaj/tawm ntawm cov interfaces uas tau saib xyuas. Piv txwv li, tus nqi kuaj ntawm 1:2048 txhais tau tias Tus Neeg Sawv Cev ntes tau 1 ntawm txhua 2048 pob khoom (tus nqi kuaj ua ntej rau feem ntau cov khoom siv). Tsis txhob ntes tag nrho cov pob khoom, nws tsuas yog sau ob peb bytes thawj zaug ntawm lub taub hau pob khoom (feem ntau yog 60–140 bytes), uas muaj cov ntaub ntawv tseem ceeb (qhov chaw/qhov chaw nyob IP, chaw nres nkoj, protocol) thaum txo qis overhead. Tus nqi kuaj yog configurable thiab yuav tsum tau hloov kho raws li qhov ntim ntawm network traffic - tus nqi siab dua (ntau cov qauv) txhim kho qhov tseeb tab sis nce kev siv cov peev txheej, thaum tus nqi qis dua txo cov overhead tab sis yuav tsis pom cov qauv traffic tsawg.
2- Kev suav cov qauv: Ntxiv rau cov qauv pob ntawv, Tus Neeg Sawv Cev sau cov ntaub ntawv suav los ntawm cov interfaces network (piv txwv li, bytes xa/txais, pob ntawv poob, qhov yuam kev) ntawm lub sijhawm teem tseg (default: 10 vib nas this). Cov ntaub ntawv no muab cov ntsiab lus txog kev noj qab haus huv ntawm lub cuab yeej thiab qhov txuas, ua kom tiav cov qauv pob ntawv kom xa tau daim duab tiav ntawm kev ua haujlwm ntawm lub network.
2.3 Kev Xa Tawm thiab Kev Tshawb Fawb Txog Cov Ntaub Ntawv
Thaum twg sau tau lawm, tus Neeg Sawv Cev yuav muab cov qauv pob ntawv thiab cov ntaub ntawv suav rau hauv sFlow Datagrams (UDP pob ntawv) thiab xa mus rau tus neeg sau. Tus neeg sau yuav txheeb xyuas cov ntaub ntawv no, sau cov ntaub ntawv ua ke, thiab tsim cov duab pom, cov ntawv qhia, lossis cov lus ceeb toom. Piv txwv li, nws tuaj yeem txheeb xyuas cov neeg tham sab saum toj, nrhiav pom cov qauv tsheb khiav tsis zoo (piv txwv li, DDoS tawm tsam), lossis taug qab kev siv bandwidth dhau sijhawm. Tus nqi kuaj suav nrog hauv txhua datagram, tso cai rau tus neeg sau los kwv yees cov ntaub ntawv kom kwv yees tag nrho cov ntim tsheb khiav (piv txwv li, 1 qauv ntawm 2048 txhais tau tias ~ 2048x qhov tsheb khiav pom).
3. Tus nqi tseem ceeb ntawm sFlow yog dab tsi?
Tus nqi ntawm sFlow yog los ntawm nws txoj kev sib xyaw ua ke ntawm kev nthuav dav, kev siv nyiaj tsawg, thiab kev ua tus qauv - daws cov teeb meem tseem ceeb ntawm kev saib xyuas network niaj hnub no. Nws cov txiaj ntsig tseem ceeb yog:
3.1 Kev Siv Nyiaj Tsawg
Tsis zoo li kev ntes tag nrho cov pob ntawv (uas yuav tsum tau khaws cia thiab ua txhua pob ntawv) lossis cov txheej txheem zoo li NetFlow (uas tswj cov lus qhia ntws ntawm cov khoom siv), sFlow siv kev kuaj thiab zam kev khaws cov ntaub ntawv hauv zos. Qhov no txo CPU, nco, thiab bandwidth siv ntawm cov khoom siv network, ua rau nws zoo tagnrho rau kev sib txuas ceev ceev thiab cov chaw muaj kev txwv (piv txwv li, cov tes hauj lwm me me mus rau nruab nrab). Nws tsis tas yuav kho vajtse lossis hloov kho nco ntxiv rau feem ntau ntawm cov khoom siv, txo cov nqi xa tawm.
3.2 Kev Loj Hlob Siab
sFlow yog tsim los kom sib npaug nrog cov tes hauj lwm niaj hnub no. Ib tus neeg sau khoom tuaj yeem saib xyuas kaum tawm txhiab tus interfaces hla ntau pua lub cuab yeej, txhawb nqa cov kev sib txuas txog li 100 Gbps thiab dhau ntawd. Nws cov txheej txheem kuaj xyuas kom meej tias txawm tias qhov ntim tsheb khiav nce ntxiv, Tus Neeg Sawv Cev siv cov peev txheej tseem tswj tau - tseem ceeb rau cov chaw khaws ntaub ntawv thiab cov tes hauj lwm qib carrier nrog cov tsheb khiav ntau heev.
3.3 Kev Pom Kev Sib Txuas Lus Zoo
Los ntawm kev sib txuas ua ke cov qauv pob ntawv (rau cov ntsiab lus ntawm cov tsheb khiav) thiab kev kuaj xyuas cov khoom siv / txuas kev noj qab haus huv, sFlow muab kev pom tseeb txog kev khiav tsheb hauv network. Nws txhawb nqa Layer 2 txog Layer 7, ua kom muaj kev saib xyuas cov ntawv thov (piv txwv li, web, P2P, DNS), cov txheej txheem (piv txwv li, TCP, UDP, MPLS), thiab tus cwj pwm ntawm tus neeg siv. Qhov kev pom tseeb no pab cov pab pawg IT nrhiav pom cov teeb meem, daws teeb meem, thiab ua kom zoo dua kev ua haujlwm hauv network.
3.4 Kev Tswj Tus Qauv Tsis Muaj Tus Muag Khoom
Raws li tus qauv qhib (RFC 3176), sFlow tau txais kev txhawb nqa los ntawm txhua tus neeg muag khoom loj hauv network (Cisco, Huawei, Juniper, Arista) thiab sib koom ua ke nrog cov cuab yeej saib xyuas nrov (piv txwv li, PRTG, SolarWinds, sFlow-RT). Qhov no tshem tawm qhov kev xauv khoom ntawm tus neeg muag khoom thiab tso cai rau cov koom haum siv sFlow hla cov chaw sib txawv hauv network (piv txwv li, sib xyaw Cisco thiab Huawei cov khoom siv).
4. Cov Xwm Txheej Siv Ib Txwm Muaj ntawm sFlow
Qhov ua tau ntau yam ntawm sFlow ua rau nws haum rau ntau yam kev sib txuas lus hauv network, txij li cov lag luam me mus rau cov chaw khaws ntaub ntawv loj. Nws cov xwm txheej siv feem ntau suav nrog:
4.1 Kev Saib Xyuas Network ntawm Chaw Khaws Cov Ntaub Ntawv
Cov chaw khaws ntaub ntawv vam khom cov kev sib txuas ceev ceev (10 Gbps+) thiab txhawb nqa ntau txhiab lub tshuab virtual (VMs) thiab cov ntawv thov containerized. sFlow muab kev pom tseeb tiag tiag rau hauv cov tsheb khiav hauv network leaf-spine, pab cov pab pawg IT nrhiav "elephant flows" (cov dej loj, ntev uas ua rau muaj kev sib tsoo), ua kom zoo dua qhov kev faib bandwidth, thiab daws teeb meem kev sib txuas lus ntawm VM/thawv. Nws feem ntau siv nrog SDN (Software-Defined Networking) los pab txhawb kev tsim kho tsheb khiav dynamic.
4.2 Kev Tswj Xyuas Network Hauv Tsev Kawm Ntawv
Cov tsev kawm ntawv lag luam xav tau kev saib xyuas uas pheej yig thiab nthuav dav kom taug qab cov neeg ua haujlwm khiav tsheb, ua kom muaj cov cai bandwidth, thiab nrhiav pom qhov tsis zoo (piv txwv li, cov khoom siv tsis raug cai, kev sib koom cov ntaub ntawv P2P). sFlow tus nqi qis ua rau nws zoo tagnrho rau cov hloov pauv hauv tsev kawm ntawv thiab cov routers, ua rau cov pab pawg IT tuaj yeem txheeb xyuas cov bandwidth hogs, ua kom zoo dua kev ua haujlwm ntawm daim ntawv thov (piv txwv li, Microsoft 365, Zoom), thiab xyuas kom meej tias muaj kev sib txuas zoo rau cov neeg siv kawg.
4.3 Kev Ua Haujlwm Hauv Network Qib Carrier
Cov neeg teb xov tooj siv sFlow los saib xyuas cov backbone thiab nkag mus rau hauv cov tes hauj lwm, taug qab qhov ntim ntawm cov tsheb khiav, latency, thiab qhov yuam kev ntawm ntau txhiab tus interfaces. Nws pab cov neeg teb xov tooj txhim kho kev sib raug zoo peering, nrhiav DDoS tawm tsam thaum ntxov, thiab them nqi rau cov neeg siv khoom raws li kev siv bandwidth (kev suav nyiaj siv).
4.4 Kev Saib Xyuas Kev Ruaj Ntseg Hauv Network
sFlow yog ib qho cuab yeej muaj txiaj ntsig zoo rau cov pab pawg kev ruaj ntseg, vim nws tuaj yeem ntes tau cov qauv tsheb khiav tsis zoo uas cuam tshuam nrog DDoS tawm tsam, chaw nres nkoj scans, lossis malware. Los ntawm kev tshuaj xyuas cov qauv pob ntawv, cov neeg sau khoom tuaj yeem txheeb xyuas cov khub IP qhov chaw / qhov chaw tsis zoo, kev siv protocol tsis tau xav txog, lossis kev nce siab sai sai hauv tsheb khiav - ua rau muaj kev ceeb toom rau kev tshawb nrhiav ntxiv. Nws txhawb nqa rau cov taub hau pob ntawv raw ua rau nws muaj txiaj ntsig zoo rau kev ntes cov kab mob tawm tsam tsis yog tus qauv (piv txwv li, encrypted DDoS tsheb khiav).
4.5 Kev Npaj Peev Xwm thiab Kev Tshawb Fawb Txog Qhov Sib Txawv
Los ntawm kev sau cov ntaub ntawv keeb kwm ntawm kev khiav tsheb, sFlow ua rau cov pab pawg IT tuaj yeem txheeb xyuas cov qauv (piv txwv li, kev nce siab ntawm bandwidth rau lub caij, kev siv daim ntawv thov uas loj hlob tuaj) thiab npaj kev txhim kho network ua ntej. Piv txwv li, yog tias cov ntaub ntawv sFlow qhia tias kev siv bandwidth nce 20% txhua xyoo, cov pab pawg tuaj yeem npaj nyiaj rau kev sib txuas ntxiv lossis kev txhim kho khoom siv ua ntej muaj kev sib tsoo.
5. Cov Kev Txwv ntawm sFlow
Txawm hais tias sFlow yog ib lub cuab yeej saib xyuas muaj zog, nws muaj cov kev txwv uas cov koom haum yuav tsum xav txog thaum xa nws:
5.1 Kev Sib Pauv Qhov Tseeb ntawm Kev Sampling
Qhov kev txwv loj tshaj plaws ntawm sFlow yog nws txoj kev vam khom rau kev kuaj. Cov nqi kuaj qis (piv txwv li, 1: 10000) yuav plam cov qauv tsheb khiav tsis tshua muaj tab sis tseem ceeb (piv txwv li, cov dej ntws tawm tsam luv luv), thaum cov nqi kuaj siab ua rau cov peev txheej siv ntau ntxiv. Tsis tas li ntawd, kev kuaj qhia txog qhov sib txawv ntawm cov lej suav - kev kwv yees ntawm tag nrho cov tsheb khiav yuav tsis yog 100% raug, uas tuaj yeem ua teeb meem rau cov xwm txheej siv uas xav tau kev suav tsheb khiav kom meej (piv txwv li, kev them nqi rau cov kev pabcuam tseem ceeb).
5.2 Tsis Muaj Cov Ntsiab Lus Tag Nrho
Tsis zoo li NetFlow (uas ntes tau cov ntaub ntawv ntws tag nrho, suav nrog lub sijhawm pib/xaus thiab tag nrho cov bytes/packets ib qho ntws), sFlow tsuas yog ntes cov qauv pob ntawv ib leeg xwb. Qhov no ua rau nws nyuaj rau taug qab tag nrho lub neej ntawm ib qho ntws (piv txwv li, txheeb xyuas thaum twg ib qho ntws pib, nws kav ntev npaum li cas, lossis nws tag nrho cov bandwidth siv).
5.3 Kev Txhawb Nqa Txwv Rau Qee Qhov Interfaces/Hom
Ntau lub cuab yeej network tsuas yog txhawb nqa sFlow ntawm lub cev interfaces - virtual interfaces (piv txwv li, VLAN subinterfaces, port channels) lossis stack hom yuav tsis raug txhawb nqa. Piv txwv li, Cisco switches tsis txhawb nqa sFlow thaum booted hauv stack hom, txwv nws siv hauv stacked switch deployments.
5.4 Kev vam khom rau Kev Siv Tus Neeg Sawv Cev
Qhov ua tau zoo ntawm sFlow nyob ntawm qhov zoo ntawm kev siv Agent ntawm cov khoom siv network. Qee cov khoom siv qis lossis cov khoom siv qub dua yuav muaj cov Agents tsis zoo uas siv cov peev txheej ntau dhau lossis muab cov qauv tsis raug. Piv txwv li, qee cov routers muaj cov CPU tswj hwm qeeb uas tiv thaiv kev teeb tsa cov nqi kuaj zoo tshaj plaws, txo qhov tseeb ntawm kev tshawb pom rau kev tawm tsam zoo li DDoS.
5.5 Kev Nkag Siab Txog Kev Thauj Mus Los Uas Muaj Kev Txwv
sFlow tsuas yog ntes cov headers ntawm cov ntaub ntawv - cov ntaub ntawv encrypted (piv txwv li, TLS 1.3) zais cov ntaub ntawv payload, ua rau nws tsis tuaj yeem txheeb xyuas qhov tseeb ntawm daim ntawv thov lossis cov ntsiab lus ntawm cov ntaub ntawv. Txawm hais tias sFlow tseem tuaj yeem taug qab cov ntsuas yooj yim (piv txwv li, qhov chaw / qhov chaw, qhov loj ntawm cov ntaub ntawv), nws tsis tuaj yeem muab kev pom tob rau hauv tus cwj pwm ntawm cov ntaub ntawv encrypted (piv txwv li, cov ntaub ntawv payloads phem zais rau hauv cov ntaub ntawv HTTPS).
5.6 Qhov nyuaj ntawm cov khoom sau
Tsis zoo li NetFlow (uas muab cov ntaub ntawv ntws uas tau txheeb xyuas ua ntej), sFlow xav kom cov neeg sau khoom txheeb xyuas cov taub hau ntawm cov pob khoom raw. Qhov no ua rau muaj kev nyuaj ntawm kev xa tawm thiab kev tswj hwm ntawm cov neeg sau khoom, vim tias cov pab pawg yuav tsum xyuas kom meej tias cov neeg sau khoom tuaj yeem tswj hwm ntau hom pob khoom thiab cov txheej txheem sib txawv (piv txwv li, MPLS, VXLAN).
6. sFlow Ua Haujlwm Li Cas hauvTus Neeg Sawv Cev Pob Khoom Hauv Network (NPB)?
Ib lub Network Packet Broker (NPB) yog ib lub cuab yeej tshwj xeeb uas sib sau ua ke, lim dej, thiab faib cov tsheb khiav hauv network rau cov cuab yeej saib xyuas (piv txwv li, sFlow collectors, IDS/IPS, full packet capture systems). NPBs ua haujlwm ua "cov chaw khaws tsheb khiav," kom ntseeg tau tias cov cuab yeej saib xyuas tau txais tsuas yog cov tsheb khiav uas lawv xav tau - txhim kho kev ua haujlwm zoo thiab txo cov cuab yeej ntau dhau. Thaum koom ua ke nrog sFlow, NPBs txhim kho sFlow lub peev xwm los ntawm kev daws nws cov kev txwv thiab nthuav nws qhov pom kev.
6.1 Lub Luag Haujlwm ntawm NPB hauv kev xa tawm sFlow
Hauv kev siv sFlow ib txwm muaj, txhua lub cuab yeej network (hloov, router) khiav ib tus neeg sawv cev sFlow uas xa cov qauv ncaj qha mus rau tus neeg sau. Qhov no tuaj yeem ua rau tus neeg sau ntau dhau hauv cov tes hauj lwm loj (piv txwv li, ntau txhiab lub cuab yeej xa UDP datagrams tib lub sijhawm) thiab ua rau nws nyuaj rau lim cov tsheb khiav tsis tseem ceeb. NPBs daws qhov no los ntawm kev ua haujlwm ua tus neeg sawv cev sFlow lossis tus neeg sau tsheb khiav, raws li hauv qab no:
6.2 Hom Kev Sib Koom Tes Tseem Ceeb
1- Kev Ntsuas sFlow Hauv Nruab Nrab: NPB sib sau ua ke cov tsheb khiav los ntawm ntau lub cuab yeej hauv network (ntawm SPAN/RSPAN chaw nres nkoj lossis TAPs), tom qab ntawd khiav sFlow Agent los kuaj cov tsheb khiav sib sau ua ke no. Hloov chaw ntawm txhua lub cuab yeej xa cov qauv mus rau tus neeg sau, NPB xa ib qho kwj ntawm cov qauv - txo cov khoom thauj khoom sau thiab ua kom yooj yim rau kev tswj hwm. Hom no zoo tagnrho rau cov tes hauj lwm loj, vim nws ua rau kev kuaj hauv nruab nrab thiab ua kom muaj kev kuaj sib xws thoob plaws hauv network.
2- Kev Lim Tsheb thiab Kev Txhim Kho: NPBs tuaj yeem lim cov tsheb ua ntej kuaj, kom ntseeg tau tias tsuas yog cov tsheb tseem ceeb (piv txwv li, cov tsheb los ntawm cov subnets tseem ceeb, cov ntawv thov tshwj xeeb) raug kuaj los ntawm sFlow Agent. Qhov no txo cov lej ntawm cov qauv xa mus rau tus sau, txhim kho kev ua haujlwm zoo thiab txo cov kev xav tau khaws cia. Piv txwv li, NPB tuaj yeem lim tawm cov tsheb tswj hwm sab hauv (piv txwv li, SSH, SNMP) uas tsis tas yuav saib xyuas, tsom mus rau sFlow rau cov neeg siv thiab cov ntawv thov tsheb.
3- Kev Sib Sau Ua Ke thiab Kev Sib Txuas Lus Qauv: NPBs tuaj yeem sib sau ua ke cov qauv sFlow los ntawm ntau lub cuab yeej, tom qab ntawd sib txuas cov ntaub ntawv no (piv txwv li, txuas cov tsheb khiav los ntawm qhov chaw IP mus rau ntau qhov chaw) ua ntej xa mus rau tus neeg sau. Qhov no muab rau tus neeg sau nrog kev pom tiav ntawm cov dej ntws hauv network, hais txog sFlow qhov kev txwv ntawm kev tsis taug qab tag nrho cov ntsiab lus ntws. Qee cov NPBs siab heev kuj txhawb nqa kev kho cov nqi kuaj dynamically raws li qhov ntim tsheb khiav (piv txwv li, nce cov nqi kuaj thaum lub sijhawm tsheb khiav nce siab kom txhim kho qhov tseeb).
4- Kev Rov Ua Dua thiab Muaj Peev Xwm Ntau: NPBs tuaj yeem muab cov kev rov ua dua rau cov qauv sFlow, kom ntseeg tau tias tsis muaj cov ntaub ntawv ploj yog tias tus neeg sau khoom ua tsis tiav. Lawv kuj tseem tuaj yeem thauj cov qauv sib npaug thoob plaws ntau tus neeg sau khoom, tiv thaiv ib tus neeg sau khoom kom tsis txhob ua lub qhov rooj tsis ruaj khov.
6.3 Cov txiaj ntsig zoo ntawm NPB + sFlow kev sib koom ua ke
Kev koom ua ke sFlow nrog NPB muab ntau yam txiaj ntsig tseem ceeb:
- Kev nthuav dav: NPBs tswj kev sib sau ua ke thiab kev kuaj cov tsheb khiav, tso cai rau sFlow collector kom nthuav dav los txhawb ntau txhiab lub cuab yeej yam tsis muaj kev thauj khoom ntau dhau.
- Qhov Tseeb: Kev hloov kho tus nqi kuaj dynamic thiab kev lim tsheb txhim kho qhov tseeb ntawm cov ntaub ntawv sFlow, txo qhov kev pheej hmoo ntawm kev ploj cov qauv tsheb tseem ceeb.
- Kev Ua Haujlwm Zoo: Kev kuaj thiab lim dej hauv nruab nrab txo cov qauv xa mus rau tus neeg sau, txo qis bandwidth thiab kev siv cia.
- Kev Tswj Xyuas Yooj Yim: NPBs ua ke sFlow kev teeb tsa thiab kev saib xyuas, tshem tawm qhov xav tau los teeb tsa Cov Neeg Sawv Cev ntawm txhua lub cuab yeej network.
Xaus lus
sFlow yog ib qho kev soj ntsuam network uas tsis hnyav, scalable, thiab tus qauv uas daws cov teeb meem tshwj xeeb ntawm cov network ceev ceev niaj hnub no. Los ntawm kev siv kev kuaj xyuas los sau cov tsheb khiav thiab cov ntaub ntawv suav, nws muab kev pom dav dav yam tsis muaj kev ua haujlwm ntawm lub cuab yeej poob qis - ua rau nws zoo tagnrho rau cov chaw khaws ntaub ntawv, cov tuam txhab, thiab cov neeg nqa khoom. Txawm hais tias nws muaj kev txwv (piv txwv li, kev kuaj xyuas qhov tseeb, cov ntsiab lus ntws tsawg), cov no tuaj yeem txo qis los ntawm kev koom ua ke sFlow nrog Network Packet Broker, uas ua rau kev kuaj xyuas hauv nruab nrab, lim cov tsheb khiav, thiab txhim kho kev nthuav dav.
Txawm koj tab tom saib xyuas lub network me me hauv tsev kawm ntawv lossis lub backbone loj ntawm cov neeg nqa khoom, sFlow muab kev daws teeb meem uas pheej yig thiab tsis muaj kev cuam tshuam los ntawm cov neeg muag khoom kom tau txais kev nkag siab txog kev ua haujlwm ntawm lub network. Thaum ua ke nrog NPB, nws yuav muaj zog dua - ua rau cov koom haum tuaj yeem nthuav dav lawv cov khoom siv saib xyuas thiab tswj kev pom thaum lawv cov network loj hlob.
Lub sijhawm tshaj tawm: Lub Ob Hlis-05-2026
