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CHAPTER
8-1
Cisco MDS 9000 Family NX-OS Interfaces Configuration Guide
OL-29284-01, Release 6.x
8
Configuring FlexAttach Virtual pWWN
• Information About FlexAttach Virtual pWWN, page 8-1
• Guidelines and Limitations, page 8-3
• Configuring FlexAttach Virtual pWWN, page 8-3
• Verifying FlexAttach Virtual pWWN Configuration, page 8-5
• Monitoring FlexAttach Virtual pWWN, page 8-6
Information About FlexAttach Virtual pWWN
This section includes the following topics:
• FlexAttach Virtual pWWN, page 8-1
• Difference Between San Device Virtualization and FlexAttach Port Virtualization, page 8-2
• FlexAttach Virtual pWWN CFS Distribution, page 8-2
• Security Settings for FlexAttach Virtual pWWN, page 8-3
FlexAttach Virtual pWWN
FlexAttach virtual pWWN feature facilitates server and configuration management. In a SAN
environment, the server installation or replacement, requires interaction and coordination among the
SAN and server administrators. For coordination, it is important that the SAN configuration does not
change when a new server is installed, or when an existing server is replaced. FlexAttach virtual pWWN
minimizes the interaction between the server administrator and the SAN administrator by abstracting the
real pWWN using virtual pWWNs.
When FlexAttach virtual pWWN is enabled on an interface, a virtual pWWN is assigned to the server
interface. The real pWWN is replaced by a virtual pWWN, which is used for a SAN configuration such
as zoning.
Server administrators can benefit from FlexAttach in the following scenarios:
• Pre-configure—Pre-configure SAN for new servers that are not available physically yet. For
example, they may be on order. FlexAttach can be enabled on the ports designated for the new
servers and use the virtual WWNs assigned for configuring SAN. The new servers are then plugged
into the fabric without any change needed in the SAN.