THE EMC EFFECT Page.1 Building the ESN Infrastructure Doing business without barriers EMC Enterprise...

THE EMC EFFECTTHE EMC EFFECT

Page.1

Building the ESN Infrastructure

Doing business without barriers

EMC Enterprise Storage Network


Page.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


Page.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


Page.4

Fibre Channel

Channels NetworksFibre Channel

HighPerformance

Low ProtocolOverhead

DynamicConfiguration

ExtendedDistance

Multi-systemConnectivity

StaticConfiguration

Short Distance

Single SystemConnectivity

LowPerformance

High ProtocolOverhead

Network that performs channel operations!


Page.5

Fibre Channel Architecture

FC4

FC3

FC2

FC1

FC0

SCSI HIPPI ESCON

IP ATM

COMMON SERVICES

FRAMING/FLOW CONTROL

ENCODE/DECODE

12.5MB/sec

25MB/sec

50MB/sec

100MB/sec

FutureHigher Rates

A layered protocol stack similar to OSI

FC0-FC2 provide transport services

FC3 not currently implemented

FC-4 provides encapsulation of other protocols


Page.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


Page.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


Page.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.


Page.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.


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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


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FC-AL Hub

NL_Port

NL_PortFC 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


Page.12

Switched Fabric (FC-SW)

F_Port

FC Switch

N_Port

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!


Page.13

Fabric Services

FCP

SCSI-3

FCP

FCP

SCSI-3

FA

Host Switch Symmetrix

Fabric Login (FLOGI)

Fabric Login (FLOGI)

Port Login (PLOGI) 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

SNSLogin Server

FabricController


Page.14

Fabric Zoning

Zone 1

Zone 2

Creates logical subsets of devices

Devices can only “talk” to devices in the same zone

Increases control of the fabric


Page.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.


Page.16

Data Flow Comparison

Hub (loop) - Nodes arbitrate for shared bandwidth.

Switch (fabric) - Full bandwidth on each link.


Page.17

Supported Media Types

Media Distance

Copper (Twinax) 30 Meters

Multimode Fiber, 62.5 Micron 175 Meters

Multimode Fiber, 50 Micron 500 Meters

Singlemode Fiber, 9 Micron 10 Kilometers


Page.18

Connectivity Evolution

DATA CENTER

CAMPUS

REMOTE

1990

ESCON / BUS & TAG

1994

SCSI

25M

FC-AL

FC-AL

HUB

19981997

FC-AL

(Direct Connect)

500M

SWITCH

FC-SW

FC-SW

1999

1 -- 11 KM

SYMMETRIX

THE EMC EFFECT Page.1 Building the ESN Infrastructure Doing business without barriers EMC Enterprise...

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