Hello Rafael
It is possible to apply port security on multiple ports at the same time. Indeed it is possible to configure any feature on multiple ports at the same time. This is done using the “range” command. For example, you can configure fastethernet ports 0/1 to 0/10 by issuing the following command:
interface range fastethernet 0/1 - 10
The result will be the following prompt:
switch(config-if-range)#
All configurations you apply, including port security features, will be applied to all ports within the range. You can also choose specific ports rather than a range using:
interface range fastethernet 0/1, 5, 8
There are a multitude of commands that will allow you to discover the status of port security for specific ports and for a switch in general. More information about these can be found here:
I hope this has been helpful!
Laz