Cisco MDS 9000 Series Configuration Guide

To overwrite the login information with the duplicate pWWN login, enter the dpvm overwrite-duplicate-pwwn
command.
Note
About DPVM Databases
The DPVM database consists of a series of device mapping entries. Each entry consists of a device pWWN
or nWWN assignment along with the dynamic VSAN to be assigned. You can configure a maximum of 16,000
DPVM entries in the DPVM database. This database is global to the whole switch (and fabric) and is not
maintained for each VSAN.
The DPVM feature uses three databases to accept and implement configurations.
• Configuration (config) database—All configuration changes are stored in the configuration database
when distribution is disabled.
• Active database—The database currently enforced by the fabric.
• Pending database—All configuration changes are stored in the DPVM pending database when distribution
is enabled (see the DPVM Database Distribution, on page 26).
Changes to the DPVM config database are not reflected in the active DPVM database until you activate the
DPVM config database. Changes to the DPVM pending database are not reflected in the config or active
DPVM database until you commit the DPVM pending database. This database structure allows you to create
multiple entries, review changes, and let the DPVM config and pending databases take effect.
Configuring DPVM Config and Pending Databases
To create and populate the DPVM config and pending databases, follow these steps:
Step 1 switch# config terminal
switch(config)#
Enters configuration mode.
Step 2 switch(config)# device-alias mode enhanced
switch(config)# device-alias commit
Enables enhanced device alias mode. This is required for device-alias configuration in the DPVM database.
Step 3 switch(config)# dpvm database
switch(config-dpvm-db)#
Creates the DPVM config database.
Step 4 switch(config)# no dpvm database
(Optional) Deletes the DPVM config database.
Step 5 switch(config-dpvm-db)# pwwn 12:33:56:78:90:12:34:56 vsan 100
Maps the specified device pWWN to VSAN 100.
Cisco MDS 9000 Series Fabric Configuration Guide, Release 8.x
23
Creating Dynamic VSANs
About DPVM Databases

Cisco MDS 9000 Series Specifications

General

Category	Switch
Operating System	Cisco NX-OS
Ports	Varies by model
Protocols	Fibre Channel (FC), Fibre Channel over IP (FCIP), iSCSI
Redundancy	Redundant supervisors, power supplies, and fans
Management	Cisco Data Center Network Manager (DCNM), CLI, SNMP
Virtualization Support	VSANs (Virtual SANs)
Security Features	Fibre Channel Security Protocol (FC-SP)
Hot Swappable Components	power supplies, fans
Power Supply Options	AC and DC options available