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14-3
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-6965-03, Cisco MDS SAN-OS Release 2.x
Chapter 14 Dynamic VSAN Configuration
About DPVM
Config Database Activation
When you explicitly activate the database, the config database becomes the active database. Activation
may fail if conflicting entries are found between the config and the currently active database. However,
you can force activation to override conflicting entries.
Copying the DPVM Database
The following circumstances may require that you copy the active database to the config database:
• If the learned entries are only added to the active database.
• If the config database or entries in the config database are accidently deleted.
Autolearn Entries
The DPVM database can be configured to automatically learn (autolearn) about new devices within each
VSAN. The autolearn feature can be enabled or disabled at any time. Learned entries are created by
populating device pWWNs and VSANs in the DPVM active database. The DPVM active database should
already be available to enable the autolearn feature.
You can delete any learned entry from the DPVM active database. These entries only become permanent
in the active database when you disable the autolearn feature.
The following conditions apply to learned entries:
• If a device logs out while autolearn is enabled, that entry is automatically deleted from the DPVM
active database.
• If the same device logs into the switch multiple times through different ports, then the VSAN
corresponding to last login is remembered.
• Learned entries do not override previously configured and activated entries.
• Learning is a two-part process:
–
Learning currently logged-in devices—occurs from the time learning is enabled.
–
Learning new device logins— occurs as and when new devices log in to the switch.