{"id":121433,"date":"2025-01-20T21:46:10","date_gmt":"2025-01-20T19:46:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/otkryt-instrumentarij-dlya-programmiruemyh-ethernet-kommutatorov-intel-tofino"},"modified":"2025-01-20T21:46:10","modified_gmt":"2025-01-20T19:46:11","slug":"otkryt-instrumentarij-dlya-programmiruemyh-ethernet-kommutatorov-intel-tofino","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/otkryt-instrumentarij-dlya-programmiruemyh-ethernet-kommutatorov-intel-tofino","title":{"rendered":"V\u00e6rkt\u00f8jet til programmerbare Ethernet-switscher fra Intel Tofino er \u00e5bnet","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Intel har \u00e5bnet v\u00e6rkt\u00f8jet, der g\u00f8r det muligt at skabe brugerdefinerede applikationer til pakkeh\u00e5ndtering i de programmerbare Ethernet-switscher Tofino-serien. Under Apache 2.0-licensen er koden til backend'en til kompilatoren p4c samt komponenter fra udviklingsmilj\u00f8et Intel P4 Studio blevet gjort tilg\u00e6ngelig, herunder drivere, simuleringsmodellen for switchet, server og klient til BF Runtime-protokollen. For at skabe applikationer anvendes det dom\u00e6ne-specifikke programmeringssprog P4 (Programming Protocol-independent Packet Processors), som er beregnet til at definere logikken for pakkeh\u00e5ndtering i netv\u00e6rksenheder som netv\u00e6rkskort, switche, routere og firewalls. <\/p>\n

Den offentliggjorte backend muligg\u00f8r overs\u00e6ttelse af programmer skrevet i P4 til repr\u00e6sentationer, der kan installeres p\u00e5 switche i Intel Tofino-serien. Dette g\u00f8r det muligt for brugerne af switche at skabe applikationer, der udvider standardfunktionen, \u00e6ndrer logikken for drift eller tilpasser enheden til de specifikke krav i deres netv\u00e6rk. <\/p>\n

Programmer skrevet i P4 kompileres til repr\u00e6sentationer for m\u00e5lplatforme, som kan v\u00e6re b\u00e5de hardwarebaserede (FPGA, programmerbare ASIC'er) og softwarebaserede (x86, BPF). Sammen med koden til installation p\u00e5 de m\u00e5lrettede systemer genererer kompilatoren runtime til at styre applikationen ved hj\u00e6lp af Protobuf\/gRPC-protokoller og P4Runtime API. <\/p>\n

Den typiske logik i programmerne omfatter klassifikation af pakker baseret p\u00e5 deres overskrifter og udf\u00f8relse af handlinger p\u00e5 indkommende pakker, s\u00e5som omdirigering, kassering, \u00e6ndring af TTL og erstatning af felter. Sproget er ikke bundet til netv\u00e6rksprotokoller og giver udviklere mulighed for at definere enhver protokol i relation til de kompilrede applikationer (udvikleren knytter en beskrivelse af formaterne for overskrifter og protokollens felter).

\"V\u00e6rkt\u00f8jet<\/center> <\/p>\n

Udover den offentliggjorte backend til switche fra Intel Tofino tilbyder P4-projektet ogs\u00e5 en backend til kompilering af P4-applikationer til kode skrevet i C, som derefter kan kompilere til et format, der er egnet til udf\u00f8relse i virtuelle maskiner<\/a> eBPF i Linux-kernen. Projektet udvikler ogs\u00e5 en \u00e5ben simulator til switch, som kan bruges til at udf\u00f8re eksperimenter i det virtuelle netv\u00e6rk Mininet, samt en backend til kompilering af P4-programmer til simulatoren.
\n
Kilde: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u043a \u043a\u043e\u043c\u043f\u0438\u043b\u044f\u0442\u043e\u0440\u0443 p4c \u0438 \u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u043e\u0432 \u0441\u0440\u0435\u0434\u044b \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 Intel P4 Studio, \u0442\u0430\u043a\u0438\u0445 \u043a\u0430\u043a \u0434\u0440\u0430\u0439\u0432\u0435\u0440\u044b, \u043c\u043e\u0434\u0435\u043b\u044c \u0441\u0438\u043c\u0443\u043b\u044f\u0446\u0438\u0438 \u043a\u043e\u043c\u043c\u0443\u0430\u0442\u043e\u0440\u0430, \u0441\u0435\u0440\u0432\u0435\u0440 \u0438 \u043a\u043b\u0438\u0435\u043d\u0442 \u0434\u043b\u044f \u043f\u0440\u043e\u0442\u043e\u043a\u043e\u043b\u0430 BF Runtime. \u0414\u043b\u044f \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f 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