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Building the ESN Infrastructure

Building the ESN Infrastructure. EMC Enterprise Storage Network. Doing business without barriers. Agenda. Fibre Channel Basics Enterprise Storage Network (ESN) Introduction ESN Connectivity Direct Connect FC-AL Hubs Connectrix Fibre Channel Director ESN Access Control Zoning

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Building the ESN Infrastructure

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  1. Building the ESN Infrastructure EMC Enterprise Storage Network Doing business without barriers

  2. Agenda • Fibre Channel Basics • Enterprise Storage Network (ESN) Introduction • ESN Connectivity • Direct Connect • FC-AL Hubs • Connectrix Fibre Channel Director • ESN Access Control • Zoning • Volume Logix • Case Studies

  3. Fibre Channel Characteristics • High speed serial data transfer • Unaware of content of information being transferred • Simultaneously supports multiple protocols • Potential connectivity of millions of devices • Increases distance between devices • Network that performs channel operations

  4. Fibre Channel Fibre Channel Networks Channels Dynamic Configuration Static Configuration Low Performance High Performance Multi-system Connectivity Short Distance Low Protocol Overhead Extended Distance High Protocol Overhead Single System Connectivity Network that performs channel operations!

  5. FC4 SCSI HIPPI ESCON IP ATM FC3 COMMON SERVICES FC2 FRAMING/FLOW CONTROL FC1 ENCODE/DECODE FC0 12.5 MB/sec 25 MB/sec 50 MB/sec 100 MB/sec Future Higher Rates Fibre Channel Architecture • A layered protocol stack similar to OSI • FC0-FC2 provide transport services • FC3 not currently implemented • FC-4 provides encapsulation of other protocols

  6. ANSI Fibre Channel Standards • Protocol Mappings (FC-4) • SCSI FCP Fibre Channel Protocol for SCSI-3 • Physical Signaling (FC-0, FC-1, FC-2) • FC-PH Fibre Channel Physical and Signaling • FC-PH-2 Fibre Channel 2nd Generation Physical and Signaling • FC-PH-3 Fibre Channel 3rd Generation Physical and Signaling • Topologies and Services • FC-FG Fibre Channel Fabric Generic • FC-AL Fibre Channel Arbitrated Loop • FC-AL-2 Fibre Channel 2nd Generation Arbitrated Loop • FC-SW Fibre Channel Switched Fabric

  7. Fibre Channel Classes of Service • Class 1 - dedicated connection, flow controlled, acknowledged • Class 2 - connectionless, multiplexed, flow controlled, acknowledged • Class 3 - connectionless, multiplexed, flow controlled, datagram • Class F - inter-switch communications • Class 4 - fractional bandwidth, quality of service, virtual channels

  8. Fibre Channel Topology Terms • Node - An end point in the network • Link - A connection between two nodes • Fabric - Multiple Fibre Channel switches interconnected and using Fibre Channel methodology for linking nodes and routing frames n a Fibre Channel network • N_Port - Node port, a port at the end of a point-to-point link. • NL_Port - A port which supports the arbitrated loop topology • F_Port - Fabric port, the access point of the fabric which connects to a N_Port • FL_Port - A fabric port which connects to a NL_Port • E_Port - Expansion port on a switch. Links multiple switches. • G_Port - A port on a switch with the ability to function as either a F_Port or a E_port. • GL_Port - A port on a switch with the ability to function as either a FL_Port or a E_Port. • HBA - Host Bus Adapter, the interface between the server bus and storage network.

  9. Fibre Channel Topologies • Point-to-Point - Dedicated link between two ports. • Fibre Channel Arbitrated Loop (FC-AL) - Shared interconnect between 2 to 126 nodes. • Fibre Channel Switched Fabric (FC-SW) - Dynamic connectivity between greater than 16 million nodes.

  10. Point-To-Point • Dedicated full bandwidth connection two nodes • No special protocol required to gain access to the link • Basic fabric connection type N_Port N_Port

  11. FC-AL Hub • Physical star, Logical loop (FC-AL) • 2 to 126 nodes per loop • Nodes arbitrate for control of the loop • One full bandwidth circuit open at a time NL_Port NL_Port FC Hub

  12. Switched Fabric (FC-SW) • Point-to-point connection between each node and the switch • N x 100 MB/sec scaled bandwidth • N/2 simultaneous full bandwidth circuits • Greater than 16 million nodes per fabric • EMC Connectrix! N_Port F_Port FC Switch

  13. Fabric Services Switch Host Symmetrix Fabric Controller FA • Simple Name Service (SNS) login supported by switch • Buffer-to-buffer flow control between nodes and switch • Fabric Controller routes frames between nodes • Class 3 implemented today SCSI-3 SCSI-3 Login Server FCP SNS FCP FCP Fabric Login (FLOGI) Fabric Login (FLOGI) Port Login (PLOGI)

  14. Fabric Zoning • Creates logical subsets of devices • Devices can only “talk” to devices in the same zone • Increases control of the fabric Zone 1 Zone 2

  15. Switch versus Hub Comparison SWITCHES HUBS • FC-SW Architecture scaleable to millions of connections. • Bandwidth per device stays constant with increased connectivity. • Bandwidth is scaleable relative to connections. • Switch software includes robust capabilities for managing a topology. • FC-AL is limited to 127 devices. (substantially fewer connections can be implemented for ideal system performance). • Bandwidth per device diminishes with increased connectivity. • Aggregate bandwidth is NOT scaleable relative to connections. • Limited software management functionality.

  16. Data Flow Comparison Hub (loop) - Nodes arbitrate for shared bandwidth. Switch (fabric) - Full bandwidth on each link.

  17. Supported Media Types Copper (Twinax) 30 Meters Multimode Fiber, 62.5 Micron 175 Meters Multimode Fiber, 50 Micron 500 Meters Singlemode Fiber, 9 Micron 10 Kilometers Media Distance

  18. Connectivity Evolution REMOTE CAMPUS FC-SW FC-AL DATA CENTER HUB SWITCH FC-AL (Direct Connect) 500M 1 -- 11 KM FC-AL FC-SW SCSI 25M ESCON / BUS & TAG 1998 1990 1994 1997 1999 SYMMETRIX

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