Ip san best practices

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IP SAN Best Practices
A Dell Technical White Paper

PowerVault MD3200i Storage Arrays

PowerVault™ MD3200i: IP SAN Best Practices

THIS WHITE PAPER IS FOR INFORMATIONAL PURPOSES ONLY, AND MAY CONTAIN TYPOGRAPHICAL ERRORS AND TECHNICAL INACCURACIES. THE CONTENT IS PROVIDED AS IS, WITHOUT EXPRESS OR IMPLIED WARRANTIES OF ANY KIND. © 2010 Dell Inc. All rights reserved. Reproduction of thismaterial in any manner whatsoever without the express written permission of Dell Inc. is strictly forbidden. For more information, contact Dell. Dell, the DELL logo, the DELL badge, PowerConnect, and PowerVault are trademarks of Dell Inc. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. Dell Inc. disclaimsany proprietary interest in trademarks and trade names other than its own.

June 2010

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PowerVault™ MD3200i: IP SAN Best Practices

Contents
Introduction ............................................................................................................. 2 iSCSI Overview.......................................................................................................... 2 IP SAN Design ............................................................................................................ 2 Best Practices - Implementation ..................................................................................... 3 Redundancy ........................................................................................................... 3 Security................................................................................................................... 5 IP SAN Network Infrastructure ....................................................................................... 5 IP SAN Optimization .................................................................................................... 7 Summary................................................................................................................. 9

Figures
Figure 1. Figure 2. Fully Redundant MD3200i Configuration ............................................................... 4 MD3200i Controller Configuration ....................................................................... 8

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PowerVault™ MD3200i: IP SAN Best Practices

Introduction
The intent ofthis document is to provide guidance for optimizing an IP SAN environment utilizing the Dell MD3200i storage array. The best practices within this document are recommendations to provide a fault tolerant, high performance environment to maximize the capabilities of an MD3200i SAN. The recommendations may be applied according to the requirements of the environment in which the installed storagearray or arrays are utilized, and not all best practices may be applicable to all installations. The best practices in this paper are focused on Dell Inc. technology based solutions.

iSCSI Overview
iSCSI is a block-level storage protocol that lets users create a storage network using Ethernet. iSCSI uses Ethernet as a transport for data from servers to storage devices or storage-area networks.Because iSCSI uses Ethernet, it doesn't suffer from some of the complexity and distance limitations that encumber other storage protocols. The iSCSI protocol puts standard SCSI commands into TCP and sends those SCSI commands over standard Ethernet. An iSCSI SAN consists of servers - with an iSCSI host bus adapter (HBA) or network interface card (NIC) - disk arrays and tape libraries. Unlike other SANtechnologies, iSCSI uses standard Ethernet switches, routers and cables, and the same Ethernet protocol deployed for communications traffic on LANs (TCP/IP). It can take advantage of the same type of switching, routing and cabling technology used for a LAN. Because iSCSI uses SCSI commands, relying on Ethernet only to transport the SCSI commands, operating systems see iSCSI-connected devices as...
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