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Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
OL-16597-01
Chapter 1 Configuring Port Security
Database Merge Guidelines
If the pending database contains more than one activation and auto-learning configuration when you
commit the changes, the activation and auto-learning changes are consolidated and the resulting
operation may change (see Table 1-3).
Database Merge Guidelines
A database merge refers to a union of the configuration database and static (unlearned) entries in the
active database. See the “CFS Merge Support” section on page 1-6 for detailed concepts.
When merging the database between two fabrics, follow these guidelines:
• Verify that the activation status and the auto-learning status is the same in both fabrics.
• Verify that the combined number of configurations for each VSAN in both databases does not
exceed 2000.
Table 1-3 Scenarios for Activation and Auto-learning Configurations in Distributed Mode
Scenario Actions Distribution = OFF Distribution = ON
A and B exist in the
configuration
database,
activation is not
done and devices
C,D are logged in.
1. You activate the port
security database and
enable auto-learning.
configuration database = {A,B}
active database = {A,B, C
1
, D*}
1. The * (asterisk) indicates learned entries.
configuration database = {A,B}
active database = {null}
pending database = {A,B + activation to
be enabled}
2. A new entry E is
added to the
configuration
database.
configuration database = {A,B,
E}
active database = {A,B, C*, D*}
configuration database = {A,B}
active database = {null}
pending database = {A,B, E + activation
to be enabled}
3. You issue a commit. Not applicable configuration database = {A,B, E}
active database = {A,B, E, C*, D*}
pending database = empty
A and B exist in the
configuration
database,
activation is not
done and devices
C,D are logged in.
1. You activate the port
security database and
enable auto-learning.
configuration database = {A,B}
active database = {A,B, C*, D*}
configuration database = {A,B}
active database = {null}
pending database = {A,B + activation to
be enabled}
2. You disable learning. configuration database = {A,B}
active database = {A,B, C, D}
configuration database = {A,B}
active database = {null}
pending database = {A,B + activation to
be enabled +
learning to be disabled}
3. You issue a commit. Not applicable configuration database = {A,B}
active database = {A,B} and devices C
and D are logged out. This is equal to an
activation with auto-learning disabled.
pending database = empty