techbook: iscsi san topologies

Download TechBook: iSCSI SAN Topologies

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This EMC Engineering TechBook provides a high-level overview of iSCSI SAN topologies and includes basic information about TCP/IP technologies and iSCSI solutions.

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  • 1. iSCSI SAN Topologies Version 2.0 iSCSI SAN Topology Overview TCP/IP and iSCSI Overview Use Case ScenariosRon DharmaMugdha KulkarniVinay JonnakutiJonghoon (Jason) JeongSteven Chung
  • 2. Copyright 2011 EMC Corporation. All rights reserved. EMC believes the information in this publication is accurate as of its publication date. The information is subject to change without notice. THE INFORMATION IN THIS PUBLICATION IS PROVIDED AS IS. EMC CORPORATION MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WITH RESPECT TO THE INFORMATION IN THIS PUBLICATION, AND SPECIFICALLY DISCLAIMS IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Use, copying, and distribution of any EMC software described in this publication requires an applicable software license. For the most up-to-date regulatory document for your product line, go to the Technical Documentation and Advisories section on EMC Powerlink. For the most up-to-date listing of EMC product names, see EMC Corporation Trademarks on EMC.com. All other trademarks used herein are the property of their respective owners. Part number H8080.22 iSCSI SAN Topologies TechBook
  • 3. ContentsPreface............................................................................................................................ 11Chapter 1 TCP/IP Technology TCP/IP overview.............................................................................. 18 Transmission Control Protocol ................................................ 18 Internet Protocol ........................................................................ 20 TCP terminology............................................................................... 21 TCP error recovery............................................................................ 25 TCP network congestion.................................................................. 28 IPv6 ..................................................................................................... 29 Features of IPv6.......................................................................... 29 Deployment status..................................................................... 31 Addressing.................................................................................. 32 IPv6 packet.................................................................................. 37 Transition mechanisms ............................................................. 38 Internet Protocol security (IPsec).................................................... 40 Tunneling and IPsec.................................................................. 40 IPsec terminology ...................................................................... 41Chapter 2 iSCSI Technology iSCSI technology overview.............................................................. 44 iSCSI discovery.................................................................................. 46 Static............................................................................................. 46 Send target .................................................................................. 46 iSNS ............................................................................................. 46 iSCSI error recovery.......................................................................... 47 iSCSI security..................................................................................... 48 Security mechanisms................................................................. 48 iSCSI SAN Topologies TechBook 3
  • 4. Contents Authentication methods ........................................................... 49 Chapter 3 iSCSI Solutions Best practices ..................................................................................... 52 Network design ......................................................................... 52 Header and data digest............................................................. 52 EMC native iSCSI targets................................................................. 53 Symmetrix................................................................................... 53 VNX for Block and CLARiiON................................................ 54 Celerra Network Server............................................................ 55 VNX series for File..................................................................... 56 Configuring iSCSI targets ................................................................ 58 Bridged solutions.............................................................................. 60 Brocade........................................................................................ 60 Cisco ............................................................................................ 63 Brocade M Series ....................................................................... 69 Summary............................................................................................ 73 Chapter 4 Use Case Scenarios Connecting an iSCSI Windows host to a VMAX array ............... 76 Configuring storage port flags and an IP address on a VMAX array ............................................................................ 76 Configuring LUN Masking on a VMAX array...................... 81 Configuring an IP address on a Windows host .................... 83 Configuring iSCSI on a Windows host .................................. 85 Configuring Jumbo frames .................................................... 101 Setting MTU on a Windows host .......................................... 101 Connecting an iSCSI Linux host to a VMAX array.................... 103 Configuring storage port flags and an IP address on a VMAX array .......................................................................... 104 Configuring LUN Masking on a VMAX array.................... 111 Configuring an IP address on a Linux host......................... 114 Configuring CHAP on the Linux host.................................. 117 Configuring iSCSI on a Linux host using Linux iSCSI Initiator CLI ........................................................................... 117 Configuring Jumbo frames .................................................... 119 Setting MTU on a Linux host................................................. 119 Configuring the VNX for block 1 Gb/10 Gb iSCSI port ........... 121 Prerequisites ............................................................................. 121 Configuring storage system iSCSI front-end ports ............ 1224 iSCSI SAN Topologies TechBook
  • 5. ContentsAssigning an IP addres