10g网络数据转发设备的fpga设计与实现-(5267)

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1、ABSTRACTABSTRACTWiththeprogressofnetworktechnology,datacenterscanprovideplatformforavarietyofnetworkservicesandapplications.Ithasbecomeaneffectivestructuretosupportdatastorage.Atthesametime,withtheraiseanddevelopmentofcloudcomputing,datacenterswillbemoreandmoreimportanti

2、nthefuture.Butwiththeincreasingofdatatrafficwithinthedatacenterandthegrowingofnetworklineratecontinues,networkswitchesneedtoprocessmorelookupoperationspersecond,anddotheseoperationsinlargerflowtables.Thesedemandschallengethenowusedlookupandforwardingmechanismsinnetworksw

3、itches.Lookupandforwardingmechanismsinthetraditionalhardware-basedswitchescan’tsupportlargeflowtables,andhaspoorscalability.Lookupandforwardingmechanismsinsoftware-basedswitchesalsohaveperformancebottlenecks.Researchershaveproposedmanysolutions,buteachofthemhavesomedrawb

4、acks.TheLookupandforwardingmechanismofthisthesiscansolvetheproblemsaboveinsomeway.Ituseshardwaretoprocessandstoretheframes,whilethesoftwaredoingthelookupoperations.Atlast,weimplementatethehardwareplatformofdataforwardingdevicebasedonthismechanisms.Weimplementatetheplatfo

5、rminFPGAofXilinx’s7K325T.Intheimplementationprocess,weusehigh-performanceDMAbasedonPCIExpressand10-GigabitEthernettechniques.Themainresultofthisthesisisa10Gnetworklookupandforwardingmechanismwhichcansupportlarge-scaleflowtablesandhasscalability.Accordingtothedemandforfuc

6、tionsinhardwarepartsofthemechanism,wedesignandimplementatetheDMAcontrollerbasedonPCIExpressandMAClayerof10-GigabitEthernetprotocol.Afterthecodedesignoftheseparts,wealsodothefunctionverificationtoensurethecorrectnessofeachmodule.Finally,wetestthedesignonboardfordelayandtr

7、ansmissionrate.Keywords:Lookupandforwardingmechanism，10-GigabitEthernet，PCIExpress，DirestMemoryAccess(DMA)II目录目录第一章绪论....................................................................................................................11.1研究背景..............................

8、..............................................................................11.2研究问题的提出..............