Cisco Cisco mds 9216 - fabric switch User manual

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Cisco MDS 9000 Family
SAN Volume Controller
Configuration Guide
Cisco MDS SAN-OS Release 1.3
September, 2004
Customer Order Number: DOC-7816119=
Text Part Number: 78-16119-01

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Cisco MDS 9000 Family SAN Volume Conroller Configuration Guide
Copyright © 2003 Cisco Systems, Inc. All rights reserved.

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New and Changed Information
Table 1 summarizes the new and changed features for the Cisco MDS 9000 Family SAN Volume
Controller Configuration Guide, and tells you where they are documented. If a feature has changed in
Release 1.3, a brief description of the change appears in the “Description” column, and that release is
shown in the “Changed in Release” column.
Table 2 contains the history of the changes to the Cisco MDS 9000 Family SAN Volume Controller
Configuration Guide, Release 1.3. When the document is updated for the next release, these changes are
incorporated into the new revision and will no longer appear in this table.
Table 1 Documented Features for the Cisco MDS 9000 Family SAN Volume Controller
Configuration Guide
Feature Description
Changed in
Release
Where
Documented
Dual fabric
configuration
CSM modules in combination with the
Inter-VSAN Routing (IVR) feature operate
independently across two isolated fabrics.
1.3(5m) Configuring a
Dual Fabric
SAN
Environment
CSM modules The SVC functionality is only available when
CSM modules are present in the switch.
1.3(5m) Getting Started
Quorum
configuration
Using the qorum command to overwrite the
system-assigned quorum disk and pick a
particular set of managed disks to be a quorum
disk.
1.3(5m) Managing
Back-End
Storage
SVC configuration Introduction of SVC configuration using Cisco
MDS switches
1.3(1) This guide
Table 2 Documentation Changes for Cisco MDS 9000 Family SAN Volume Controller
Configuration Guide, Release 1.3
Date Description of Change Where Changed
11/21/2003 Document created ---
03/19/2004 Configuring iSCSI Hosts—sample
procedure added
See Chapter 6, “Configuring Hosts”

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New and Changed Information

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CONTENTS
New and Changed Information iii
Preface ix
Audience ix
Organization ix
Document Conventions x
Related Documentation xi
Obtaining Documentation xi
Cisco.com xi
Documentation CD-ROM xii
Ordering Documentation xii
Documentation Feedback xii
Obtaining Technical Assistance xiii
Cisco.com xiii
Technical Assistance Center xiii
Cisco TAC Website xiv
Cisco TAC Escalation Center xiv
Obtaining Additional Publications and Information xiv
CHAPTER 1SVC Product Overview 1-1
About SVC 1-1
SVC Features 1-2
CHAPTER 2Getting Started 2-1
Preparing the Cisco MDS Switch 2-2
Setting Up the Cisco MDS Switch 2-2
Setting Up a New Cisco MDS Switch 2-2
Updating an Existing Cisco MDS Switch 2-3
SVC Role Authorization 2-4
Understanding SVC Terminology 2-5
Node 2-5
I/O group 2-5
Cluster 2-5
MDisk 2-5

Contents
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VDisk 2-5
MDisk Group 2-6
Host 2-6
Separating Hosts and Storage Devices 2-6
Verifying Interface Connectivity 2-8
Assigning VSAN Numbers 2-9
Multiple Initiators and Targets 2-9
CHAPTER 3Creating and Managing Clusters 3-1
About CSM Nodes 3-2
About Clusters 3-2
Physical Topology 3-2
Selecting Nodes for a Cluster 3-3
Isolating Management Traffic 3-4
Creating a Cluster 3-5
Adding Nodes to Clusters 3-6
Verifying Nodes in a Cluster 3-7
Deleting a node from a Cluster 3-8
Deleting a Cluster 3-9
CHAPTER 4Managing Back-End Storage 4-1
About Managed Disks 4-2
About MDisk Groups 4-2
Extents 4-2
MDisk Modes 4-2
Isolating Back-end Storage Traffic 4-3
Verifying Traffic Isolation 4-4
Configuring LUN Masking 4-4
Identifying MDisks 4-5
Configuring MDisk Groups 4-5
Configuring Quorum Disks 4-7
CHAPTER 5Managing Virtual Disks 5-1
Virtualization Policies 5-2
Striped 5-2
Sequential 5-2

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Image 5-2
Licensing Requirements 5-2
Configuring VDisks 5-3
CHAPTER 6Configuring Hosts 6-1
About Hosts 6-1
Isolating Host Traffic 6-1
Creating Hosts 6-4
Mapping VDisks to Hosts 6-4
Configuring iSCSI Hosts in SVC 6-5
CHAPTER 7Configuring Copy Services 7-1
Data Migration 7-2
Data Migration Application 7-2
Data Migration Operation 7-2
Migrating VDisks between MDisk groups 7-2
FlashCopy 7-4
FlashCopy Applications 7-4
FlashCopy Mapping 7-4
FlashCopy Consistency Groups 7-5
Starting the FlashCopy 7-6
Stopping FlashCopy 7-7
Remote Copy 7-8
Disaster Recovery 7-8
Remote Copy Relationships 7-8
Remote Copy Consistency Groups 7-8
Configuring Remote Copy 7-9
Starting Remote Copy 7-10
Stopping Remote Copy 7-11
Failover and Recovery Process 7-12
CHAPTER 8Upgrading CSM Software 8-1
Upgrading Clusters 8-2
Cluster Upgrade Prerequisites 8-2
Recognizing Failure Situations 8-2
Cluster Upgrade Guidelines 8-3
Performing the Cluster Upgrade 8-3
Sample Cluster Upgrade 8-4

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Automatic Upgrade during Node Addition 8-5
Upgrading in Service Mode 8-5
Sample Service Mode Upgrade 8-6
Upgrading the Switch Software 8-7
Performing the Switch Upgrade 8-7
Sample Switch Upgrade 8-7
Replacing CSMs 8-9
Prerequisites to Replacing a CSM 8-10
Replacing a CSM in the Same Slot 8-10
Replacing a CSM in a Different Slot 8-11
Post-Replacement Verification 8-12
CHAPTER 9Configuring SPAN on SVC Interfaces 9-1
About SVC as a SPAN Source 9-2
Configuring SVC Interfaces as SPAN Sources 9-2
Using VSAN Filters to Specify N-Port Traffic 9-3
CHAPTER 10 Configuring a Dual Fabric SAN Environment 10-1
Overview 10-2
Basic SVC Requirements 10-2
Dual Fabric Prerequisites 10-2
Sample Configuration 10-2

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Preface
This preface describes the audience, organization, and conventions of the Cisco MDS 9000 Family
Configuration Guide. It also provides information on how to obtain related documentation.
Audience
This Cisco MDS 9000 Family SAN Volume Controller User Guide is for system administrators who
configure and maintain network and storage systems using the Cisco CSM and the SAN-OS
Command-Line Interface (CLI).
The information contained in this guide assumes that you have a:
•Basic understanding of:
– multilayer switches and related hardware
– system, storage, and some IP network administration
•Working knowledge using a host-based volume management tool
– General understanding of volume management in a SAN environment
– Working knowledge of the MDS 9000 Family switch administration and configuration
Organization
This guide is organized as follows:
Chapter Title Description
Chapter 1 Product Overview Presents an overview of the Cisco MDS 9000
Family of multilayer switches and directors.
Chapter 2 Getting Started Explains the tasks required to set up and
configure each building block of your system
to run SVC for Switches.
Chapter 3 Creating and Managing Clusters Provides details on the cluster-creation
process.
Chapter 4 Managing Back-End Storage Provides details on managed disks, managed
disk groups, and the back-end traffic isolation
process.

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Preface
Document Conventions
Document Conventions
Command descriptions use these conventions:
Screen examples use these conventions:
This document uses the following conventions:
Note Means reader take note. Notes contain helpful suggestions or references to material not covered in the
manual.
Caution Means reader be careful. In this situation, you might do something that could result in equipment
damage or loss of data.
Chapter 5 Managing Virtual Disks Explains the virtualization policies and
provides details on the virtual disk
configuration process.
Chapter 6 Configuring Hosts Provides detail on isolating host traffic,
creating hosts, and mapping VDisks to hosts.
Chapter 7 Configuring Copy Services Discusses the copy services, including data
migration, FlashCopy, and Remote Copy
available in Cisco MDS 9216 Switches and in
Cisco MDS 9500 Directors.
Chapter 8 Upgrading CSM Software Explains the procedures and processes for the
different upgrade possibilities when a Caching
Services Module (CSM) is used.
Chapter Title Description
boldface font Commands and keywords are in boldface.
italic font Arguments for which you supply values are in italics.
[ ] Elements in square brackets are optional.
[ x | y | z ] Optional alternative keywords are grouped in brackets and separated by
vertical bars.
screen font Terminal sessions and information the switch displays are in screen font.
boldface screen font Information you must enter is in boldface screen font.
italic screen font
Arguments for which you supply values are in italic screen font.
< > Nonprinting characters, such as passwords are in angle brackets.
[ ] Default responses to system prompts are in square brackets.
!, # An exclamation point (!) or a pound sign (#) at the beginning of a line of code
indicates a comment line.

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Preface
Related Documentation
Related Documentation
The documentation set for the Cisco MDS 9000 Family includes the following documents:
•Cisco MDS 9000 Family Release Notes for Cisco MDS SAN-OS Releases
•Cisco MDS 9000 Family Interoperability Support Matrix
•Cisco MDS SAN-OS Release Compatibility Matrix for IBM SAN Volume Controller Software for
Cisco MDS 9000
•Regulatory Compliance and Safety Information for the Cisco MDS 9000 Family
•Cisco MDS 9500 Series Hardware Installation Guide
•Cisco MDS 9216 Switch Hardware Installation Guide
•Cisco MDS 9100 Series Hardware Installation Guide
•Cisco MDS 9000 Family Configuration Guide
•Cisco MDS 9000 Family Command Reference
•Cisco MDS 9000 Family Fabric Manager Configuration Guide
•Cisco MDS 9000 Family SAN Volume Controller Configuration Guide
•Cisco MDS 9000 Family MIB Quick Reference
•Cisco MDS 9000 Family CIM Programming Reference Guide
•Cisco MDS 9000 Family System Messages Guide
•Cisco MDS 9000 Family Troubleshooting Guide
•Cisco MDS 9000 Family Port Analyzer Adapter 2 Installation and Configuration Note
•Cisco MDS 9000 Family Port Analyzer Adapter Installation and Configuration Note
For information on IBM TotalStorage SAN Volume Controller Storage Software for the Cisco MDS
9000 Family, refer to the IBM TotalStorage Support website:
http://www.ibm.com/storage/support/2062-2300/
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Obtaining Technical Assistance
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Obtaining Additional Publications and Information

CHAPTER
1-1
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1
SVC Product Overview
The Cisco MDS 9000 Family SAN Volume Controller User Guide provides information on how to set up
and configure the SAN Volume Controller (SVC) storage software using a Cisco MDS 9000 Family
Caching Services Module (CSM).
For more information about IBM TotalStorageTM SAN Volume Controller (SVC) Storage Software, refer
to the IBM TotalStorage SAN Volume Controller Storage Software for Cisco MDS 9000 Configuration
Guide or the IBM TotalStorage SAN Volume Controller Storage Software for Cisco MDS 9000
Command-Line Interface User's Guide.
This chapter describes the SVC and explains the supported features. It includes the following sections:
•About SVC, page 1-1
•SVC Features, page 1-2
About SVC
IBM and Cisco combine the IBM TotalStorageTM SAN Volume Controller (SVC) Storage Software with
the Cisco MDS 9000 Caching Services Module (CSM) to reduce complexity and to reduce the cost of
managing SAN-based storage. This solution implements a cache-based, clustered architecture and
provides a highly available, scalable alternative that is necessary in today’s demanding storage
environments.
The combined SVC storage software along with the Cisco MDS 9000 Series CSM is delivered as a
feature of the Cisco MDS 9000 Family. The SVC software runs on a clustered pair of CSMs within the
switch.
Based on virtualization technology, this solution is designed to support a virtualized pool of storage from
the storage subsystems attached to a SAN. It manges the combined storage volumes from a central point,
avoids downtime for planned outages, increases capacity utilization, and implements copy services from
a single license across multiple storage devices.
This storage pool helps tap unused storage capacity by increasing efficiency. It is designed as an
integrated solution supporting high performance and continuous availability in open-system
environments. Storage volumes are represented to applications as virtual disks (VDisks). These VDisks
are created from the pool of managed disks residing behind the storage engines. Storage administrators
can scale performance by adding storage engines and scale capacity by adding disks to the managed
storage pool.

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Chapter 1 SVC Product Overview
SVC Features
The IBM—Cisco SVC storage solution offers the following benefits and advantages:
•Reduces complexity
•Lowers the cost of managing SAN-based storage
•Creates a single pool of storage from disparate storage devices to increase capacity utilization
•Easier to manage
•Implementing a cache-based, clustered architecture to provide a highly available solution.
•Provides the scalability and performance required in today’s demanding storage environments.
•Provides simple migration of storage.
•Provides a single set of copy services.
SVC Features
This section explains the features provided by the combined SVC storage software and the Cisco MDS
9000 Series CSM solution.
•A central point for volume management control
Through virtualization, the Cisco MDS 9000 Family’s SAN-OS software helps create pools of
managed disks spanning multiple storage subsystems. These managed disks are mapped to virtual
disks used by server applications thus making better use of existing storage. This simple interface
incorporates the Storage Management Initiative Specification (SMIS) application programming
interface (API), and further demonstrates IBM’s focus on open standards.
•Dynamic data migration
The Cisco MDS 9000 SAN-OS software includes a dynamic data-migration function that helps
administrators migrate storage from one device to another, without taking it offline. This allows
administrators to reallocate and scale storage capacity without disrupting applications. And the
solution supports both local area network (LAN) free and server-free backups while a clustered
configuration designed to support high availability allows for non-disruptive software upgrades.
SVC for Cisco MDS 9000 also leverages the IBM TotalStorage Enterprise Storage Server ™
multipathing software.
•Improved resource utilization
This solution enables more efficient use of personnel and technology resources. It helps increase
administrator productivity by empowering central management of volumes under disparate storage
controllers from a single user interface. It also increases the amount of available storage capacity by
pooling storage across multiple devices. Designed to manage up to two petabytes (PB) of total
usable storage capacity, SVC for Cisco MDS 9000 will support even higher performance by adding
storage engine pairs. All storage engines within a cluster jointly manage the entire capacity of a
storage pool.
•Advanced copy services
With conventional SAN disk arrays, copy operations are limited to in-box or like-box-to-like-box
environments. But the SVC software moves copy services from individual storage controllers to the
SAN. Administrators can apply copy services across disparate storage devices within the network.
Advanced copy services —such as FlashCopy ® and Peer-to-Peer Remote Copy (PPRC)— are
supported across the managed storage.

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Chapter 1 SVC Product Overview
SVC Features
•Cisco MDS 9000 CSM
The CSM integrates two high performance processing nodes which, when combined with the Cisco
MDS 9000 SAN-OS software, delivers network hosted virtualization and replication services. Each
CSM includes 8 GB of local cache used to hold recently accessed data blocks. On-board dual
redundant batteries and hard disk drives protect cached data in the event of a power failure. To
further ensure data availability and integrity, nodes are paired with nodes on other CSMs in high
availability clusters.
•Distributed cache-based virtualization
The Cisco MDS 9000 CSM virtualization architecture overcomes the inherent bottlenecks
associated with other virtualization architectures. Virtualization performance can be easily scaled to
the level required by adding CSMs. Application I/O response time is improved over other
virtualization architectures through the use of local caching of disk blocks. Because Cisco MDS
9000 virtualization is switch-based, any host can access any virtual volume from anywhere in the
fabric, independent of the host’s attachment point in the SAN. In addition to virtualization and
replication services, the Cisco MDS 9000 CSM leverages all of the advanced SAN-OS features
available on the Cisco MDS 9000 platform, simplifying security, diagnostics and management.
•Fabric-based virtualization using intelligent networking services
Cisco MDS 9000 fabric-based virtualization provides a level of integration with intelligent SAN
services unavailable to host or virtualization appliance-based solutions. The Cisco MDS 9000
platform with integrated CSM delivers the intelligence and advanced features required to make
multilayer intelligent storage area networks a reality including hardware-enabled innovations
designed to dramatically improve scalability, availability, security, and manageability of storage
networks, resulting in increased utility and lower total cost of ownership (TCO).
•Virtual SAN
Virtual SANs (VSANs) allow more efficient SAN utilization by creating hardware-based isolated
environments within a single SAN fabric. Each VSAN maintains its own fabric services for added
scalability and resilience. Zoning within a SAN allows additional configuration flexibility. VSANs
allow the cost of SAN infrastructure to be shared among more users, while assuring absolute
segregation and security of traffic and retaining independent control of configuration on a
VSAN-by-VSAN basis. VSANs provide a protective barrier between application hosts and physical
storage, enhancing data integrity in a virtualized storage environment.
•Comprehensive security
The Cisco CSM and the SAN-OS software integrate seamlessly to apply extensive security measures
at all possible points of attack. SSH, RADIUS, SNMPv3, and role-based access control are used to
block unauthorized access. To guard against compromising control traffic, Fibre Channel Security
Protocol (FC-SP) provides confidentiality, data origin authentication, and connectionless integrity
across the fabric. Data plane traffic is secured with VSANs, guaranteeing segregation of traffic
across shared fabrics, and with zoning to satisfy traffic segregation requirements within a VSAN.
Hardware-based ACLs provide further granularity for advanced security options.
•High availability
Like all other Cisco MDS 9000 Family modules, the CSM is hot-swappable and fully integrates into
the Cisco MDS 9000 high availability architecture. The Cisco MDS 9000 SAN-OS software
architecture offers an unparalleled level of availability including automatic restart of failed
supervisor processes and fabric level availability via Cisco PortChannel capability which allows 16
physical links to be aggregated into one logical interface. The logical interface remains active in the
event of a port, ASIC, or module failure, and can sustain the failure of any physical link without
causing a reset. Additionally, Fabric Shortest Path First (FSPF) multipathing provides the

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Cisco MDS 9000 Family SAN Volume Controller Configuration Guide
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Chapter 1 SVC Product Overview
SVC Features
intelligence to load balance across up to 16 equal cost paths and, in the event of a switch failure, to
dynamically reroute traffic. When deployed in clustered pairs and combined with SAN-OS software,
availability is extended to the volume level ensuring maximum uptime.
•Management options
The Cisco MDS 9000 Family CSM provides three principal modes of management of your virtual
storage environment: Cisco MDS 9000 Family Command Line Interface (CLI), IBM’s SVC for
Cisco MDS 9000 CLI, and IBM’s ICAT management GUI. For users who prefer a common interface
for both SAN and Volume management, the Cisco SAN-OS CLI includes the full suite of
capabilities necessary to manage your virtual storage environment from the SAN-OS command line.