CHAPTER
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27-1
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
27
SAN Device Virtualization
This chapter describes how to configure virtual devices to represent physical end devices for switches
running Cisco MDS SAN-OS Release 3.1(2) and later, or NX-OS Release 4.1(1a) and later.
Cisco SAN device virtualization (SDV) is a licensed feature included in the Cisco MDS 9000 Family
Enterprise package (ENTERPRISE_PKG). See Chapter 10, “Obtaining and Installing Licenses,” for
details about acquiring licenses.
This chapter includes the following sections:
• About SDV, page 27-1
• Configuring SDV, page 27-4
• Default Settings, page 27-10
About SDV
As of Cisco SAN-OS Release 3.1(2) and NX-OS Release 4.1(1a), you can use Cisco SDV to create
virtual devices that represent physical end-devices. Virtualization of SAN devices accelerates swapout
or failover to a replacement disk array, and it also minimizes downtime when replacing host bus adapters
(HBAs) or when re-hosting an application on a different server.
SAN devices that are virtualized can be either initiators or targets. You can virtualize targets to create a
virtual target, and also virtualize initiators to create a virtual initiator. Such configurations do not
distinguish between virtual initiators and virtual targets (see Figure 27-1 and Figure 27-2).
Figure 27-1 Target Virtualization
Primary target
Secondary target
Server
Virtual
target
Traffic from
server
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