SNIA-SDC23-Lodha-Basrur-TRUCKS-KEEP-RIGHT.pdf

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1、1|2023 SNIA.All Rights Reserved.Virtual ConferenceSeptember 28-29,2021Trucks Keep Right!Maximizing Efficiency with Fibre Channel Virtual LanesGirish Basrur and Nishant Lodha,Marvell2|2023 SNIA.All Rights Reserved.Supply chainCRMBankingManufacturingTelcoCloudAccountingHealthcareHBASwitchStorageWork o

2、n a“Credit”-based mechanismReliable,secure,block storage connectivity for business-critical systemsFibre ChannelFC3|2021 Storage Developer Conference.Insert Company Name Here.All Rights Reserved.Virtual LanesThe technology and its use cases4|2023 SNIA.All Rights Reserved.Credit based flow control in

3、 Fibre ChannelISLPhysical Lane/R_RDYVMsServer 1Storage 1Storage 2Director SwitchVMsServer 2FCFCToR SwitchVMsServer 1High Priority LaneNormal Priority LaneLow Priority LaneStorage 1Storage 2Director SwitchVMsServer 2FCFCToR SwitchVirtual Lanes/ER_RDY/VC_RDY5|2023 SNIA.All Rights Reserved.FC Virtual L

4、anes HBA to Switch,typically a one lane highway Slow traffic impedes everyone else Very difficult to root cause,impacts SLAs Marvell Virtual Lane Technology(standards based)Three lane highway Slow traffic in slow lane,fewer credits No head of line blocking Dedicated lane from initiator to target Man

5、y use cases around segregation,QoS,traffic priorities6|2023 SNIA.All Rights Reserved.How do Virtual Lanes work?Configure:Physical FC Link(and credits)divided into multiple independent lanes Cisco MDS Virtual Links(VLs)Brocade FC Virtual Channels(VCs)Negotiate:HBA Switch Storage Login Do you VL?How m

6、any?Rx BB_CRs per VL?Tx BB_CRs per VL?Priority Range values per VL?Operate:Frames are tagged(CS_CTL for Cisco,Primitives for Brocade)and transmitted on specific VLs Availability:Marvell 32G and 64GFC HBAsFCTotal credits30Total credits90VL1(High)Rx(40)Tx(40)Tx(12)Rx(12)VL3(Normal)Rx(35)Tx(35)Tx(10)Rx