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
Creating Dynamic VSANs
Port VSAN membership on the switch is assigned on a port-by-port basis. By default each port belongs
to the default VSAN.
You can dynamically assign VSAN membership to ports by assigning VSANs based on the device
WWN. This method is referred to as Dynamic Port VSAN Membership (DPVM). DPVM offers
flexibility and eliminates the need to reconfigure the port VSAN membership to maintain fabric
topology when a host or storage device connection is moved between two Cisco MDS switches or two
ports within a switch. It retains the configured VSAN regardless of where a device is connected or
moved. To assign VSANs statically, see
This chapter includes the following sections:
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
OL-16184-01, Cisco MDS SAN-OS Release 3.x
DPVM, page 21-1
DPVM Database Distribution, page 21-5
Database Merge Guidelines, page 21-8
Displaying DPVM Configurations, page 21-10
Sample DPVM Configuration, page 21-11
Default Settings, page 21-13
Chapter 6, "Using the CFS
C H A P T E R
Chapter 19, "Configuring and Managing VSANs."
Cisco MDS 9000 Family CLI Configuration Guide