Cisco Catalyst 2960 Series, Configuration Manual

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Feature Information
Feature Information Release
This feature was introduced. Cisco IOS 15.0(2)EX
Prerequisites for Port Security
If you try to set the maximum value to a number less than the number of secure addresses already configured
on an interface, the command is rejected.
Note
Restrictions for Port Security
The maximum number of secure MAC addresses that you can configure on a switch or switch stack is set by
the maximum number of available MAC addresses allowed in the system. This number is determined by the
active Switch Database Management (SDM) template. This number is the total of available MAC addresses,
including those used for other Layer 2 functions and any other secure MAC addresses configured on interfaces.
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
1481
Feature Information