Interlogix NS3500-28T-4S User Manual - Manual (Page 280)

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The page includes the following fields:
Object Description
 Port Select port for this drop down list.
 Security Enable or disable the port security.
 Mac L2 Entry The maximum number of MAC addresses that can be secured on this port. If
the limit is exceeded, the corresponding action is taken.
The switch is "born" with a total number of MAC addresses from which all ports
draw whenever a new MAC address is seen on a Port Security-enabled port.
Since all ports draw from the same pool, it may happen that a configured
maximum cannot be granted, if the remaining ports have already used all
available MAC addresses.
 Action If Limit is reached, the switch can take one of the following actions:

Forward : Do not allow more than Limit MAC addresses on the port, but
take no further action.

Shutdown : If Limit + 1 MAC addresses is seen on the port, shut down the
port. This implies that all secured MAC addresses will be removed from the
port, and no new will be learned. Even if the link is physically disconnected
and reconnected on the port (by disconnecting the cable), the port will
remain shut down. There are three ways to re-open the port:
1) Disable and re-enable Limit Control on the port or the switch,
2) Click the Reopen button.

Discard : If Limit + 1 MAC addresses is seen on the port, it will trigger the
action that do not learn the new MAC and drop the package.
Buttons
: Click to apply changes.