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Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )
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Converged Data Center: FCoE, iSCSI, & the Future of Storage Networking ( EMC World 2013 )

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This session explores the opportunities and challenges of using a single network to support both storage and networking. The Fibre Channel over Ethernet (FCoE) and iSCSI (SCSI over TCP/IP) protocols …

This session explores the opportunities and challenges of using a single network to support both storage and networking. The Fibre Channel over Ethernet (FCoE) and iSCSI (SCSI over TCP/IP) protocols offer two approaches for supporting storage over Ethernet. Standards, technologies and deployment scenarios for both protocols will be covered, along with the future of storage networking technology.


Objective 1: Describe FCoE and iSCSI and how they fit into existing storage and networking infrastructure.
After this session you will be able to:
Objective 2: Explain how FCoE and iSCSI solutions provide storage networking options for Ethernet, including 10Gb Ethernet.
Objective 3: Describe some of the opportunities and challenges of converging storage and networking environments.

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  • 1. 1© Copyright 2013 EMC Corporation. All rights reserved.CONVERGED DATACENTER:FCoE, iSCSI AND THE FUTURE OFSTORAGE NETWORKINGDavid L. Black, Ph.D.Distinguished EngineerOffice of the CTO
  • 2. 2© Copyright 2013 EMC Corporation. All rights reserved.Roadmap Information Disclaimer EMC makes no representation and undertakes no obligations withregard to product planning information, anticipated productcharacteristics, performance specifications, or anticipated releasedates (collectively, “Roadmap Information”). Roadmap Information is provided by EMC as an accommodation to therecipient solely for purposes of discussion and without intending to bebound thereby. Roadmap information is EMC Restricted Confidential and is providedunder the terms, conditions and restrictions defined in the EMC Non-Disclosure Agreement in place with your organization.
  • 3. 3© Copyright 2013 EMC Corporation. All rights reserved.Agenda Network Convergence Protocols & Standards Server Virtualization Solution Evolution Conclusion
  • 4. 4© Copyright 2013 EMC Corporation. All rights reserved.10Gb Ethernet Converged Data Center Maturation of 10 Gigabit Ethernet– Single network simplifies mobility for virtualization/cloud deployments 10 Gigabit Ethernet simplifies infrastructure– Reduces the number of cables and server adapters– Lowers capital expenditures and administrative costs– Reduces server power and cooling costs– Blade servers and server virtualization drive consolidated bandwidthFCoE and iSCSI both leverage this inflection pointLANSANSingle Wire forNetwork and Storage10GbE
  • 5. 5© Copyright 2013 EMC Corporation. All rights reserved.Un-Converged Rack Servers• Servers connect to LAN, NASand iSCSI SAN with NICs• Servers connect to FC SAN withHBAs• Some environments are stillGigabit Ethernet• Multiple server adapters,higher power/ cooling costsRack-mountserversEthernetFibre ChannelEthernet LANEthernetEthernetNICsStorageFibre Channel SANFibreChannelHBAsEthernetiSCSI SANNote: NAS is part of the convergedapproach. Everywhere that Ethernet isused in this presentation, NAS can bepart of the unified storage solution
  • 6. 6© Copyright 2013 EMC Corporation. All rights reserved.Agenda• Network Convergence• Protocols & Standards• Server Virtualization• Solution Evolution• Conclusion
  • 7. 7© Copyright 2013 EMC Corporation. All rights reserved.IP NetworkiSCSI Introduction Transport storage (SCSI) over standard Ethernet– Reliability through TCP More flexible than FC due to IP routing– Effectively reaches lower-tier servers than FC Good performance iSCSI has thrived– Especially where server, storage, andnetwork admins are the person– Example: IaaS Clouds▪ E.g., OpenStackLinkIPTCPiSCSISCSI
  • 8. 8© Copyright 2013 EMC Corporation. All rights reserved.iSCSI Introduction (continued) Standardized in 2004: IETF RFC 3720– Stable: No major changes since 2004– iSCSI Corrections and Clarifications: IETF RFC 5048 (2007)– Now underway: consolidated spec, minor updates iSCSI Session: One Initiator and one Target– Multiple TCP connections allowed in a session Important iSCSI additions to SCSI– Immediate and unsolicited data to avoid round trip– Login phase for connection setup– Explicit logout for clean teardown
  • 9. 9© Copyright 2013 EMC Corporation. All rights reserved.iSCSI Read ExampleOptimization: Goodstatus can be includedwith last “Data in” PDUCommandCompleteReceiveDataSCSI ReadCommandInitiator TargetStatusData in PDUTargetData in PDUData in PDU
  • 10. 10© Copyright 2013 EMC Corporation. All rights reserved.iSCSI Write ExampleOptimization:Immediate and/orunsolicited dataavoids a round tripStatusInitiatorReady toTransmitTargetSCSI WriteCommandReady toTransmitCommandCompleteReceiveDataReceiveDataData out PDUData out PDUData out PDUData out PDU
  • 11. 11© Copyright 2013 EMC Corporation. All rights reserved.CRCEthernetHeaderIP TCP iSCSIiSCSI EncapsulationDelivery of iSCSI Protocol Data Unit(PDU) for SCSI functionality (initiator,target, data read/write, etc.)Provides IP routing capability so packetscan find their way through the networkReliable data transport and delivery (TCP windows,ACKs, ordering, etc.) Also demux (port numbers)Provides physical network capability (Cat 6, MAC, etc.)Data
  • 12. 12© Copyright 2013 EMC Corporation. All rights reserved.FCoE: Another Option for FC FC: large and well managed installed base– Leverage FC expertise / investment– Other convergence options not incremental for existing FC Data Center solution for I/O consolidation Leverage Ethernet infrastructure and skill setFCoE allows an Ethernet-based SAN to be introducedinto an FC-based Data Centerwithout breaking existing administrative tools and workflows
  • 13. 13© Copyright 2013 EMC Corporation. All rights reserved.FCoE Extends FC on a Single NetworkNetworkDriverFCDriverConvergedNetwork AdapterServer sees storage traffic as FCFC NetworkFC StorageEthernetNetworkFCoESwitchLossless EthernetSAN sees host as FCEthernetFC
  • 14. 14© Copyright 2013 EMC Corporation. All rights reserved.FCoE Frames FC frames encapsulated in Layer 2 Ethernet frames– No TCP, Lossless Ethernet (DCB) required– No IP routing 1:1 frame encapsulation– FC frame never segmented across multiple Ethernet frames Requires at least Mini Jumbo (2.5k) Ethernet frames– Max FC payload size: 2180 bytes– Max FCoE frame size: 2240 bytesEthernetHeaderFCoEHeaderFCHeaderFC PayloadCRCEOFFCSFC Frame
  • 15. 15© Copyright 2013 EMC Corporation. All rights reserved.Ethernet is more than a cableFCoE Initialization Native FC link: Optical fiber has 2 endpoints (simple)– Discovery: Who’s at the other end?– Liveness: Is the other end still there? FCoE virtual link: Ethernet LAN or VLAN, 3+ endpoints possible– Discovery: Choice of FCoE switches– Liveness: FCoE virtual link may span multiple Ethernet links▪ Single link liveness check isn’t enough, where’s the problem? FCoE configuration: Do mini jumbo (or larger) frames work? FIP: FCoE Initialization Protocol– Discover endpoints, create and initialize virtual link with FCoE switch– Mini jumbo frame support: Large frame is part of discovery– Periodic LKA (Link Keep Alive) messages after initialization
  • 16. 16© Copyright 2013 EMC Corporation. All rights reserved.FCoE Switch DiscoveryStep 1: FIP SolicitationFCoE/FCSwitchesDCB Ethernet FC SAN Select FCoE VLAN first (pre-config or FIP) Multicast Solicitation: Server can discover multiple switches Solicitation identifies Server (FC WWN for FCoE CNA)– CNA = Converged Network Adapter (FCoE analog of HBA)– Switch chooses servers to respond to (default: respond to all)SolicitationServer
  • 17. 17© Copyright 2013 EMC Corporation. All rights reserved.FCoE Switch DiscoveryStep 2: FIP AdvertisementFCoE/FCSwitchesDCB Ethernet FC SAN Advertisement identifies switch– Multiple switches may respond, advertisement includes priority– Server chooses FCoE switch by priority (smallest number wins) Advertisement padded to max FC frame size: Test mini jumbo framesAdvertisementAdvertisementPriority = 1Priority = 25Server
  • 18. 18© Copyright 2013 EMC Corporation. All rights reserved.FIP Switch DiscoveryStep 3: FIP-based FC LoginFCoE/FCSwitchesDCB Ethernet FC SAN FIP encapsulated FC Login– Server sends FC Fabric Login (FLOGI) to selected switch– Switch responds with FC FLOGI ACC (accept) with assigned FCID All further traffic is standard FC frames (FCoE encapsulated)Priority = 25FLOGIFLOGI ACCServerPriority = 1
  • 19. 19© Copyright 2013 EMC Corporation. All rights reserved.FCoE and Ethernet Standards –Fibre Channel over Ethernet(FCoE) Developed by INCITS T11 FibreChannel Interfaces TechnicalCommittee Enables FC traffic over Ethernet FC-BB-5 standard: June 2009 FC-BB-6 standard in process toexpand solutionData Center Bridging (DCB)Ethernet Developed by IEEE Data CenterBridging (DCB) Task Group DCB Ethernet drops frames asrarely as FC Technology commonly referred to asLossless Ethernet DCB: Required for FCoE DCB: Enhancement for iSCSITwo complementary standardsParticipants: Brocade, Cisco, EMC, Emulex, HP, IBM, Intel, QLogic, others
  • 20. 20© Copyright 2013 EMC Corporation. All rights reserved.FC-BB-6 – New FCoE features (soon) Direct connection of servers to storage– PT2PT [point to point]: Single cable– VN2VN [VN_Port to VN_Port]: Single Ethernet LAN or VLAN Better support for FC fabric scaling (switch count)– Distribute logical FC fabric switch functionality– Enables every DCB Ethernet switch to participate in FCoEMore on FCoE from E-Lab:SAN Technology Update & Best Practice Deep Divefor FC, FCoE & iSCSI SANsMon 1:00pm and Thu 11:30am
  • 21. 21© Copyright 2013 EMC Corporation. All rights reserved.Lossless Ethernet (DCB) IEEE 802.1 Data Center Bridging (DCB) Link level enhancements:1. Enhanced Transmission Selection (ETS)2. Priority Flow Control (PFC)3. Data Center Bridging Exchange Protocol (DCBX) DCB: network portion that must be lossless– Generally limited to data center distances per link– Can use long-distance optics, but uncommon in practiceDCB Ethernet provides the Lossless Infrastructurethat enables FCoE. DCB also improves iSCSI.
  • 22. 22© Copyright 2013 EMC Corporation. All rights reserved.Enhanced Transmission SelectionDCB part 1: IEEE 802.1Qaz [ETS] Management framework for link bandwidth Priority configuration and bandwidth reservation– HPC & storage traffic: higher priority, reserved bandwidth Low latency forhigh priority traffic– Unused bandwidthavailable to othertrafficOffered Traffict1 t2 t3Link Utilization (10Gig link)3G/s HPC Traffic3G/s2G/s3G/sStorage Traffic3G/s3G/sLAN Traffic4G/s5G/s3G/st1 t2 t33G/s 3G/s3G/s 3G/s 3G/s2G/s3G/s 4G/s 6G/s
  • 23. 23© Copyright 2013 EMC Corporation. All rights reserved.Switch A Switch BPAUSE and Priority Flow ControlDCB part 2: IEEE 802.1Qbb & 802.3bd [PFC] PAUSE can produce lossless Ethernet behavior– Original 802.3x PAUSE affects all traffic: rarely implemented New PAUSE: Priority Flow Control (PFC)– Pause per priority level– No effect on traffic at other priority levels– Creates lossless virtual lanes Per priority flow control– Enable/disable per priority▪ Only for traffic that needs it– Better link managementthan 8-way PAUSE
  • 24. 24© Copyright 2013 EMC Corporation. All rights reserved.Data Center Bridging Capability eXchangeDCB part 3: IEEE 802.1Qaz (again) [DCBX]• Ethernet Link configuration (single link)– Extends Link Layer Discovery Protocol (LLDP)• Reliably enables lossless behavior (DCB)– e.g., exchange Ethernet priority values for FCoE and FIP• FCoE virtual links should not be instantiated without DCBXFCoE/FC SwitchesDCB Ethernet FC SANServerDCBX
  • 25. 25© Copyright 2013 EMC Corporation. All rights reserved.Ethernet Spanning Trees Reminder: FCoE is Ethernet only, no IP routing– Ethernet (layer 2) is bridged, not routed Spanning Tree Protocol (STP): Prevents (deadly) loops– Elects a Root Switch, disables redundant paths Causes problems in large layer 2 networks (for both FCoE and iSCSI)– No network multipathing– Inefficient link utilizationSiSiSiSiSiSi SiSi SiSiSiSi SiSiRoot Switch
  • 26. 26© Copyright 2013 EMC Corporation. All rights reserved.SiSiSiSiSiSi SiSi SiSiSiSi SiSiEthernet Multipathing: SPBM and TRILL SPBM = Shortest Path Bridging-MAC [IEEE 802.1aq] TRILL = Transparent Interconnection of Lots of Links [IETF RFC 6325] Layer 2 routing for Ethernet switches– Encapsulate Ethernet traffic, use IS-IS routing protocol– Block Spanning Tree Protocol Transparent to NICsAll links active 
  • 27. 27© Copyright 2013 EMC Corporation. All rights reserved.Ethernet Cabling ChoicesType / Connector Cable 1Gb 10Gb 40/100GbCopper(10GBase-T) /RJ-45Cat6 or Cat6a Most existingcabling (lotsof Cat 5e)Some products onmarket, but not forFCoE yet. For 10GbEthernet:Cat6 55mCat6a 100mNot supported(insufficientbandwidth)Optical(multimode) /LCOM2(orange)OM3 (aqua)OM4 (aqua)Rare forEthernetStandard forFCMost backbonedeployments areoptical.OM2 82mOM3 300mOM4 380mPrimarilyoptical (QSFP+connector)OM3 100mOM4 125mCopper /SFP+DA (directattach)Twinax N/A Low power5-10m distance(Rack solution)Different short-distance option(QSFP+)Think of aspart ofconnectedequipment
  • 28. 28© Copyright 2013 EMC Corporation. All rights reserved.Agenda• Network Convergence• Protocols & Standards• Server Virtualization• Solution Evolution• Conclusion
  • 29. 29© Copyright 2013 EMC Corporation. All rights reserved.Live Virtual Machine MigrationC:Shared storage:Move VM withoutmoving stored dataStorage networking:Enabler of sharedstorage
  • 30. 30© Copyright 2013 EMC Corporation. All rights reserved.virtual switch Hypervisor driverStorage Drivers and Server VirtualizationNIC NICFCHBAFCHBAvNIC vNICvSCSI vSCSIHypervisor*iSCSI initiator can also be in the VMiSCSI traffic FC trafficLAN traffic
  • 31. 31© Copyright 2013 EMC Corporation. All rights reserved.virtual switch Hypervisor driverStorage Drivers and Server VirtualizationNIC NICvNICvSCSI vSCSIHypervisoriSCSI trafficvNIC*iSCSI initiator can also be in the VMFCHBAFCHBACNACNAFCoE follows FC pathLAN traffic
  • 32. 32© Copyright 2013 EMC Corporation. All rights reserved.Software FCoE and Server VirtualizationNIC NICFCHBAFCHBAvNIC vNICvSCSI vSCSIHypervisorFCoE software in VMs would send trafficthrough the virtual switch to the NICsSWFCoESWFCoEHypervisor drivervirtual switchVirtual Switches inESX/ESXi(including CiscoNexus 1000v) andHyper-V are notLossless (no DCB)Not a problem foriSCSI, NFS or CIFSin a VM
  • 33. 33© Copyright 2013 EMC Corporation. All rights reserved.Software FCoE and Server VirtualizationNIC NICFCHBAFCHBAvNIC vNICvSCSI vSCSIHypervisorFCoE software in VMs would send trafficthrough the virtual switch to the NICsSWFCoESWFCoEHypervisor drivervirtual switchFCoE works inHypervisor or CNA(just not in a VM) CNASWFCoE
  • 34. 34© Copyright 2013 EMC Corporation. All rights reserved.Agenda• Network Convergence• Protocols & Standards• Server Virtualization• Solution Evolution• Conclusion
  • 35. 35© Copyright 2013 EMC Corporation. All rights reserved.FCoE and iSCSIFCoEFC expertise / install baseFC managementLayer 2 EthernetUse FCIP for distanceEthernetLeverageEthernet/IP expertise10 Gigabit EthernetLossless EthernetiSCSINo FC expertise neededSupports distanceconnectivity (L3 IP routing)Strong virtualization affinity
  • 36. 36© Copyright 2013 EMC Corporation. All rights reserved.iSCSI Deployment 10 Gb iSCSI solutions– Traditional Ethernet (recover fromdropped packets using TCP) or– Lossless Ethernet (DCB)environment (TCP still used) iSCSI: natively routable (IP)– Can use VLAN(s) to isolate traffic iSCSI: smaller scale solutions– Larger SANs: usually FC(e.g., for robustness, management)EthernetiSCSI SAN
  • 37. 37© Copyright 2013 EMC Corporation. All rights reserved.Top Tips From E-LabSome iSCSI Best Practices Use a separate VLAN for iSCSI– Direct visibility and control of iSCSI traffic Avoid mixing 1Gb/sec and 10Gb/sec Ethernet– Congestion can occur where speed changes DCB (lossless) Ethernet helps iSCSI, but not a panacea– E.g., Still shouldn’t mix 1Gb/sec and 10Gb/sec Ethernet
  • 38. 38© Copyright 2013 EMC Corporation. All rights reserved. Converged Switch at top of rack or end of row– Tightly controlled solution– Server 10 GE adapters: CNA or NIC iSCSI and FCoE via Converged SwitchConvergence: Server PhaseFC HBAsNICsConvergedSwitchRack MountServers10 GbE CNAsFC AttachEthernet LANStorageFibre Channel SANEthernetFCiSCSI
  • 39. 39© Copyright 2013 EMC Corporation. All rights reserved.Convergence: Network Phase Converged Switches move out of rack FCoE: Multi-hop, may be end-to-end Maintains existing SAN/network managementOverlapping admin domains may compel cultural adjustmentsConvergedSwitch10 GbE CNAsEthernet LANStorageFibre Channel SANEthernetFC/FCoEEthernet Network(IP, FCoE) and CNSRack MountServers
  • 40. 40© Copyright 2013 EMC Corporation. All rights reserved.Convergence at 10 Gigabit Ethernet Two paths to a Converged Network– iSCSI: purely Ethernet– FCoE: mix FC and Ethernet (or all Ethernet)▪ FC compatibility now and in the future Choose (one or both) on scalability,management, and skill set10 GbE CNAsEthernet LANFC & FCoESANiSCSI/FCoEStorageEthernetFC/FCoEFibre Channel& FCoE attachRack MountServersConvergedSwitch
  • 41. 41© Copyright 2013 EMC Corporation. All rights reserved.EMC and Ethernet TechBooks (Google: “FCoE Tech Book”)– Fibre Channel over Ethernet (FCoE) and Data Center Bridging(DCB) Concepts and Protocols– Fibre Channel over Ethernet (FCoE) and Data Center Bridging(DCB) Case Studies▪ Includes blade server case studies Services– Design, Implementation, Performance and Security offeringsfor networks Products– Ethernet equipment for creating Converged NetworkEnvironments
  • 42. 42© Copyright 2013 EMC Corporation. All rights reserved.Agenda• Network Convergence• Protocols & Standards• Server Virtualization• Solution Evolution• Conclusion
  • 43. 43© Copyright 2013 EMC Corporation. All rights reserved.Conclusion Converged data centers can be built using 10Gb Ethernet– FCoE: Compatible with continued use of FC under commonmanagement– iSCSI solutions work well for all IP/Ethernet networks 10 Gigabit Ethernet solutions are maturing– Standards enable integration into existing data centers– FCoE and iSCSI will follow Ethernet roadmap to 40 and 100Gigabits/sec FC will follow FC roadmap to 16GFC and 32GFC speeds Achieving a converged network: Consider technology,processes/best practices and organizational dynamics
  • 44. 44© Copyright 2013 EMC Corporation. All rights reserved.Network Virtualization: BackgroundEach application (or VM) sees its ownvirtual network, independent ofphysical networkVLAN TrunkSwitch SwitchBenefits of Virtual NetworksCommon network links with accesscontrol properties of separate links.Manage virtual networks instead ofphysical networks.Virtual SANs provide similar benefitsfor storage area networks.VirtualNetworksVLAN B VLAN CVLAN A
  • 45. 45© Copyright 2013 EMC Corporation. All rights reserved.Network Virtualization: Overview Network version of DOS’s 640k memory limit– Ethernet VLAN tag has only 12 bits!– Not enough for large data centers!– Run any workload, anywhere? Configure every VLAN, everywhere! New approach: IP-based encapsulation– Encapsulate Ethernet frames in IP– Use IP routing (e.g., OSPF ECMP) to run network Hypervisor virtual switches encapsulate traffic to/from VMs– Changes network provisioning from VLAN practices (e.g., more responsive) Example encapsulations: VXLAN, NVGRE– Initially: No DCB Ethernet support (so, no FCoE, initially)– iSCSI, NFS, CIFS all work fine (all use TCP) Storage implications: Birds of a Feather session – Wednesday, 1:00pm
  • 46. 46© Copyright 2013 EMC Corporation. All rights reserved.Related Session and Resources Breakout Session:SAN Technology Update & Best Practice Deep Divefor FC, FCoE & iSCSI SANs– Monday, 1:00pm and Thursday, 11:30am Birds of a Feather: Storage Networking and Network Virtualization– Wednesday, 1:00pm FCoE in the EMC Support Matrix– http://elabnavigator.emc.com EMC FCoE Introduction whitepaper– http://www.emc.com/collateral/hardware/white-papers/h5916-intro-to-fcoe-wp.pdf FCoE Blog by Erik Smith (E-Lab)– http://www.brasstacksblog.typepad.com
  • 47. 47© Copyright 2013 EMC Corporation. All rights reserved.Q&A

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