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About DPVM
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .
About DPVM
DPVM configurations are based on port world wide name (pWWN) and node world wide name (nWWN)
assignments. A DPVM database contains mapping information for each device pWWN/nWWN
assignment and the corresponding VSAN. The Cisco SAN-OS software checks the database during a
device FLOGI and obtains the required VSAN details.
The pWWN identifies the host or device and the nWWN identifies a node consisting of multiple devices.
You can assign any one of these identifiers or any combination of these identifiers to configure DPVM
mapping. If you assign a combination, then preference is given to the pWWN.
DPVM uses the Cisco Fabric Services (CFS) infrastructure to allow efficient database management and
distribution. DPVM uses the application driven, coordinated distribution mode and the fabric-wide
distribution scope (see
DPVM does not cause any changes to device addressing. DPVM only pertains to the VSAN membership
Note
of the device, ensuring that the host gets same VSAN membership on any port on the switch. For
example, if a port on the switch has a hardware failure, you can move the host connection to another port
on the switch and not need to update the VSAN membership manually.
DPVM is not supported on FL ports. DPVM is supported only on F ports.
Note
DPVM Requirements
To use the DPVM feature as designed, be sure to verify the following requirements:
•
•
•
The DPVM feature overrides any existing static port VSAN membership configuration. If the VSAN
Note
corresponding to the dynamic port is deleted or suspended, the port is shut down.
Enabling DPVM
To begin configuring the DPVM feature, you must explicitly enable DPVM on the required switches in
the fabric. By default, this feature is disabled in all switches in the Cisco MDS 9000 Family.
The configuration and verification commands for the DPVM feature are only available when DPVM is
enabled on a switch. When you disable this feature, all related configurations are automatically
discarded.
Cisco MDS 9000 Family Configuration Guide
17-2
Chapter 5, "Using the CFS
The interface through which the dynamic device connects to the Cisco MDS 9000 Family switch
must be configured as an F port.
The static port VSAN of the F port should be valid (not isolated, not suspended and in existence).
The dynamic VSAN configured for the device in the DPVM database should be valid (not isolated,
not suspended and in existence).
Chapter 17
Infrastructure").
OL-6973-03, Cisco MDS SAN-OS Release 2.x
Creating Dynamic VSANs
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