Esona sixhobo sixhaphakileyo sokubeka iliso kwinethiwekhi kunye nokucocwa kweengxaki namhlanje kutshintsha uhlalutyo lwePort (ixesha), ekwabizwa ngokuba yiPort Sheraring. Ivumela ukuba sibeke esweni ithrafikhi yenethiwekhi kwidlule kwi-Bandi ye-Bandi ngaphandle kokuphazamisa iinkonzo kwinethiwekhi ephilayo, kwaye ithumela ikopi yendawo esweni iliso kwizixhobo zasekhaya okanye ze-ID, okanye ezinye iintlobo zenethiwekhi.
Ukusetyenziswa okuqhelekileyo zezi:
Iingxaki zeNethiwekhi
• hlalutya u-Latency kunye ne-jitter ngokubeka i-Pippakes;
• hlaziya indlela yokubeka iliso kulawulo lwenethiwekhi;
• Fumana i-Anomalies ngokubeka iliso kwitrafikhi yendlela.
Izithuthi zetrafikhi zinokuzibonakaliswa ekuhlaleni kwezinye izibuko kwisixhobo esifanayo, okanye ngokude sizibonakalise kwezinye izixhobo zenethiwekhi esikufuphi ne-2 yesixhobo somthombo (RSAn).
Namhlanje siza kuthetha ngetekhnoloji yokuhlola kude kwi-intanethi Olu lulwandiso lwesithuba se-spasta evele.
Imigaqo emisiseko yokusebenza ye-Ersen
Okokuqala, masijonge iimpawu ze-ERSSAn:
Ikopi yepakethi evela kwi-port ye-portor ithunyelwe kwiseva yokufika ye-gesing enamava ombane (gre). Indawo ebonakalayo yeseva ayithintelwanga.
• ngoncedo lwendawo echaziweyo yomsebenzisi (i-UDF) ye-chip, nakuphi na ukuba i-chip ye-1 ukuya kwi-126 i-Byte iqhutywa ngokusekwe kwi-COORTE yenqanaba leseshoni, njengeseshoni ye-TCP ye-TCP;
Inkxaso yokucwangcisa izinga lesampulu;
Ukuxhasa ubude bepakethe yokufumana iPacket (i-packet yepakethi), ukunciphisa uxinzelelo kwiseva ekujolise kuyo.
Ngezi mpawu, unokubona ukuba kutheni uErstan sisixhobo esibalulekileyo sokubeka i-Networks Atyan ngaphakathi kwedatha.
Imisebenzi ephambili ye-ERSSAn inokushwankathelwa kwimiba emibini:
• Ukubonakala kweseshini: Sebenzisa i-ERSPAN yokuqokelela zonke i-TCP entsha kunye nokufikelela kwimemori ezikude
• Ingxaki yokuthengiswa kwenethiwekhi: ithimba inqwelo moya yendlela yohlalutyo lwempazamo xa kusenzeka i-Netle yenethiwekhi.
Ukwenza oku, isixhobo senethiwekhi somthombo kufuneka sicofe izithuthi zomdla kumsebenzisi, yenza ikopi yedatha ekhethekileyo kwisixhobo esikhethekileyo "esikhethekileyo esinokutsalwa ngokuchanekileyo kwisixhobo esaneleyo. Ngaphezu koko, yenza ukuba isixhobo sokufumana ifumane isixhobo sokukhupha kwaye sibuyisele ngokupheleleyo i-trafficored yeliso.
Isixhobo esifunyenweyo sinokuba nomnye umncedisi oxhasa ukubeka iipakethi ze-ERSPAN.
Uhlobo lwe-ERSPAN kunye nohlalutyo lwefomathi yephakheji
Iipakethi ze-ERSPAN zine-extoles kusetyenziswa i-GRE kwaye idluliselwe kuyo nayiphi na indawo ye-IP ye-IP kwi-Ethernet. I-Ersen ngoku isetyenziswa ikakhulu kwiinethiwekhi ze-IPv4, kunye nenkxaso ye-IPv6 iya kuba yimfuneko kwixesha elizayo.
Kwimo ye-encaption engqongqo ye-ERSAAPN, oku kulandelayo kukuthintelwa kwepakethi yepakethi ye-ICMP:
Iprotocol ye-ERSPAn iphuhlisile ixesha elide, kwaye ngokuphucula amandla ayo, kwenziwe iinguqulelo ezininzi, ezibizwa ngokuba "ziindidi ze-Ersen". Iindidi ezahlukeneyo zinezihloko ezahlukeneyo zentloko.
Ichazwa kwicandelo loguqulelo lokuqala lwe-ERSPAN ENhloko:
Ukongeza, intsimi yohlobo lweProtocol kwiNtloko yeGre ibonisa uhlobo lwangaphakathi lwe-ERSPAN. Uhlobo lweProtocol Dimil 0x88be ibonisa uhlobo lwe-ERSPAN II, kunye ne-0x22eb ibonisa uhlobo lwe-ERSPAN III III.
1. Chwetheza mna
Isakhelo se-ERSPAN sohlobo endisebenzisa i-IP kwaye gre ngokuthe ngqo ngaphezulu kwentloko yesakhelo sokuqala. Oku kuceba i-Ecancation yongeza ii-byte ezingama-38 ngaphezulu kwesakhelo sokuqala: 14 (Mac) + 20 (ip) + 4 (GR). Inzuzo yale fomathi kukuba inobukhulu obuqhelekileyo lwentloko kwaye inciphisa iindleko zosulelo. Nangona kunjalo, kuba ibeka iflegi yeGre yeFlegi kunye neMimandla yenguqulo ukuya ku-0, ayiphathi nayiphi na imimandla eyongezelelweyo kunye nohlobo endilisetyenziswanga ngokubanzi, ngenxa yoko akukho mfuneko yandise ngaphezulu.
Ifomathi yeNtloko yeNtloko yoTeyitha ndingolu hlobo lulandelayo:
2. Chwetheza ii
Ngohlobo lwe-II, i-C, R, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, S, iiFlegi, kunye neeNkalo zeMimandla kwi-Green zonke ziphuma kwintsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi ye-0 ngaphandle kwentsimi. Ke ngoko, intsimi yenombolo yenani iboniswa kwi-GREE YENDLU Oko kukuthi, Chwetheza ii-II II inokuqinisekisa ukulandelelana kokufumana iipakethi zalare, ukuze inani elikhulu leepakethi zangaphandle alinakulungiswa ngenxa yempazamo yenethiwekhi.
Ifomathi yeGreen yohlobo lwe-II imi ngolu hlobo lulandelayo:
Ukongeza, uhlobo lwe-ERSPAN
Ifomathi ye-ERSPAN yeNtloko ye-ERSPAN II imi ngolu hlobo lulandelayo:
Okokugqibela, emva koko emva kweFomu yomfanekiso wantlandlolo, yikhowudi ye-2-byte ethernet yokubuyisa iKhowudi yokuHamba (CRC).
Kufanelekile ukuba uqaphele ukuba ekuphunyezweni, isakhelo sesipili asinayo intsimi ye-FCS yesakhelo sokuqala, endaweni yoko le nto ixabiso le-CRC liphinde libuyiselwe kwi-ERSPAN. Oku kuthetha ukuba isixhobo sokufumana sinokuqinisekisa ukuchaneka kwe-CRC yesakhelo sokuqala, kwaye sinokuthatha kuphela ukuba kuphela kwezakhelo ezingapheliyo zibonakaliswe.
3. Chwetheza iii
Chwetheza ii-IIII Ezi ndawo kufuneka zazise zonke iiparamitha zokuqala zesakhelo seprinta kwaye zibandakanye ezo zinto azikho kwisakhelo sokuqala ngokwayo.
I-ERSPAN CEBISO III I-III I-III I-III I-III ye-III I-III inyanzelekile i-Teers ye-12 kunye nePletiment yePlanethi eyi-8.
Ifomathi yentloko ye-ERSPAN YOKUGQIBELA III imi ngolu hlobo lulandelayo:
Kwakhona, emva kwesakhelo seprinta siyi-4-byte crc.
Njengoko kunokubonwa kwifomathi yentloko yohlobo lwee-III, ukongeza ekugcineni i-ver, vlan, i-COS, ye-COS, ye-COS, T kunye ne-ID ye-ID kwi-II, ezinje:
• I-BSO: isetyenziselwa ukubonisa ukuthembeka komthwalo wezakhelo zedatha ezithethwe nge-ERRSAn. Isakhelo esifanelekileyo, 11 Ngaba isakhelo esibi, i-01 lisakhelo esifutshane, 11 lisakhelo esikhulu;
• I-Timestamp: Ithunyelwe kwelinye ilizwe ukusuka kwi-Hardware I-Harnchnchronchronchronchronchronchrenned kunye nexesha lenkqubo. Le ntsimi i-32-bit ixhasa ubuncinci ii-microsecond eziyi-100 ze-timestamp yexesha;
• Uhlobo lwesakhelo (p) kunye nohlobo lohlobo (ft): I-FT) isetyenziselwa ukukhankanya i-ERSPAN CORTNET FROLS (PUFS), kwaye oku kusetyenziswa i-ERSPAN CHEDLES okanye iipakethi ze-IP.
• I-ID ye-HW: Isichazi esahlukileyo senjini ye-ERSPAN ngaphakathi kwenkqubo;
I-GRA (iTimestamp ye-Timentathu): Icacisa ubugqwirha bexesha lexesha. Umzekelo, 00b umele inani le-microsecond eyi-100, i-01b 100 i-Nanosecond, ieee ye-1088 ye-Greature, kwaye i-11B ifuna iplati-the headformar ukuya kwiplarity ephezulu.
I-ID ye-ID yeplanethi yePlatf vs Ulwazi olukhethekileyo: Iiplanethi zePlatf zePlatf zinefomati eyahlukeneyo kunye neziqulatho ngokuxhomekeke kwixabiso le-IDf yePlatf.
Kuya kufuneka kuqatshelwe ukuba imimandla yentloko eyahlukeneyo exhaswa ngentla inokusetyenziswa kwizicelo eziqhelekileyo ze-ERSPAn, nkqu neziciko zempazamo okanye iifreyimu ze-BPU, ngelixa igcina iphakheji ye-trunk ye-vlan kunye ne-vlan ID. Ukongeza, ulwazi oluphambili lwexesha lokuphumla kunye namanye amabala eenkcukacha anokongezwa kwisakhelo se-ERSPAN ngexesha lokuguqula.
Nge-ERSPAN ANGE YINQAKU ELWENI, sinokufezekisa uhlalutyo oluhle lwenethiwekhi, emva koko siyinyusa i-ACL ehambelana ne-ERSPAN ukuze sihambelane netrafikhi yenethiwekhi esinomdla kuyo.
I-ErSPAN isebenzisa ukubonakala kweSiseko se-RDMA
Masithathe umzekelo wokusebenzisa itekhnoloji ye-ERSPAN ukufezekisa ukubonwa kwe-rdma kwimeko ye-rdma:
Rdma: Ukufikelela ngqo kwimemori kwenza ukuba i-adaptha yenethiwekhi a afunde kwaye abhale imemori ye-Server B ngokusebenzisa amakhadi onxibelelwano olukrelekrele (i-inics) kunye nokutshintsha kwebhendi ephezulu, ukusetyenziswa okuphantsi, kunye nokusetyenziswa kwezixhobo ezisezantsi. Isetyenziswe ngokubanzi kwidatha enkulu kunye nokusebenza kakuhle kokusebenza.
Rocev2: I-rdma ngaphezulu kwe-2. Idatha ye-rdma ingenelelwe kwi-UDP yentloko. Inombolo ye-Port yendawo ngu-4791.
Ukusebenza kwemihla ngemihla kunye nokugcinwa kwe-rdma kufuna ukuqokelela idatha eninzi, esetyenziselwa ukuqokelela imigca yenqanaba lemihla ngemihla kunye neealamu ezingaqhelekanga, kunye nesiseko sokufumana iingxaki ezingaqhelekanga. Ukudityaniswa ne-ERSPAN, idatha enkulu inokufakwa ngokukhawuleza ukufumana idatha esemgangathweni ye-microsecond kunye nenqanaba lokunxibelelana leProtocol yokutshintsha i-chip. Ngeenkcukacha-manani zedatha kunye nohlalutyo, ukuphela kokuphela kokuphela kokuphela kokuvavanywa kunye nokuxela kwangaphambili kunokufunyanwa.
Ukufezekisa ukubonwa kwe-dam seseshoni, sifuna i-ERSPAN yokutshatisa amagama aphambili kwiiseshoni zonxibelelwano zeRarma xa sizicingela ukugcwala kwezithuthi, kwaye kufuneka sisebenzise uluhlu lweengcali.
Ingcaciso yengcali yenqanaba loluhlu
I-UDF inamacandelo amahlanu: i-UDF Medisw, intsimi ye-Oses, intsimi yendawo, intsimi yexabiso, kunye nendawo yemaski. Ukunqongophala ngokungumthamo wamangenelo e-Hardware, i-UDFS epheleleyo inokusetyenziswa. I-UDF enye inokutshatisa i-Byte ezimbini.
I-UDF Meyigingsword: I-UDF1 ... I-UDF8 inamagama asibhozo aphambili kwi-UDF Demain
Intsimi yesiseko: Chonga indawo yokuqala yentsimi ehambelana ne-UDF. Ezilandelayo
I-L4_ihlaser (esebenzayo kwi-RG-S6520-64CQ)
I-L5_intloni (ye-RG-S651088vs8c8cy)
• Ukucima: ibonisa i-offeset ngokusekelwe kwicandelo le-base. Ixabiso lexabiso ukusuka kwi-0 ukuya kwi-126
• Intsimi yexabiso: ixabiso lokutsha lokuthelekisa. Ingasetyenziswa kunye nebala leMaski ukulungiselela ixabiso elithile ukuba libekiwe. I-bit esebenzayo yi-Byte ezimbini
• Ibala leMask
.
Ezi pakethi ezimbini eziphambili ezinxulumene nemeko ye-rdma yeseshoni yePacket yeSaziso yeSaziso (i-CNP) kunye nokuvuma okungalunganga (NAK):
Okwangaphambili iveliswa yi-rordma umamkeli emva kokufumana umyalezo we-ECN Le yokugqibela isetyenziselwa ukubonisa ukuhanjiswa kwe-rdma kunomyalezo wempendulo yePacket.
Makhe sijonge indlela yokutshatisa le miyalezo mibini usebenzisa inqanaba lengcali
Ingcali yokufikelela
imvume ye-UDP nayiphi na nayiphi na i-eq 4791I-UDF 1 L4_URDER 8 0x8100 0xFFP00(Ukutshatisa i-RG-S6520-64CQ)
imvume ye-UDP nayiphi na nayiphi na i-eq 4791I-UDF 1 l5_ider 0x8100 0xfF00(Ukutshatisa i-RG-S65108vs8c8cs8cq)
Ingcali yokufikelela
imvume ye-UDP nayiphi na nayiphi na i-eq 4791I-UDF 1 L4_i-8 0x1100 I-0xfF00 IDF 2 L4 L4.URider 20 0x6000 0xFF00(Ukutshatisa i-RG-S6520-64CQ)
imvume ye-UDP nayiphi na nayiphi na i-eq 4791I-UDF 1 l5_ident 0x1100 0xfF00 UDF 2 L5_IDDER 12 0x6000 0xFF00(Ukutshatisa i-RG-S65108vs8c8cs8cq)
Njengenyathelo lokugqibela, unokuyibona intlanganiso ye-rdma ngokunyusa uluhlu lolwandisiweyo lwenkqubo ye-ERRSAn.
Bhala ekugqibeleni
I-ErSPAN yenye yezixhobo ezingenantsingiselo kwiinethiwekhi ezinkulu zedatha, inethiwekhi encomekayo, kunye nenethiwekhi ekhulayo kunye neemfuno zolondolozo.
Ngomgangatho onyukayo we-O & M ozenzekelayo, iitekhnoloji ezinje nge-netconf, i-resconf, kunye ne-GRPC ziyathandwa phakathi kwe-O & M abafundi be-O & M. Sebenzisa i-GRPC njengomgaqo-nkqubo ongaphantsi kokuthumela ngasemva kwitrafiki ngasemva ineenzuzo ezininzi. Umzekelo, ngokusekwe kwi-HTTP / 2 protocol, inokuxhasa indlela yokuhambisa i-push phantsi konxibelelwano olufanayo. Ngekhowudi ye-prototbuf, ubungakanani bolwazi buncitshisiwe ngesiqingatha xa kuthelekiswa nefomathi ye-JSON, ukwenza usulelo lwedatha ngokukhawuleza nangokugqibeleleyo. Khawufane ucinge, ukuba usebenzisa i-ERSPAN ukuya kwimilambo enomdla kwaye emva koko ithumele kwiseva yohlalutyo kwi-GRPC, iya kuphucula kakhulu ubuchule kunye nokusebenza ngokuzenzekelayo?
IXESHA LOKUQALA: I-10 ukuya kwi-10 ukuya kwi
