Allied Telesis AT-S26 - Manual (Page 78)

Configuring the Ports
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Activating this security level requires that you first specify the ports
that are to have this level of security. This is done by entering the
ports in the Security object port field. The ports can be entered as a
range (e.g., 2-5) or individually (e.g., 2,4,6). After specifying the ports,
select the Secure level from the Port Security menu.
Ports not specified as having the Secure level will default to the
Automatic security level. For example, if you were to activate the
Secure level on only ports 1 and 2, the switch would stop learning
MAC address on those two ports, but would continue to learn
addresses on the remaining ports.
As with the Limited security level, you can also use the Port Security
prompts to control how the switch will respond in the event new MAC
addresses are received by a port. You can instruct the switch to send
a SNMP trap to a management station or disable the port.
Note
A new security level takes affect immediately on a switch once
selected.
4. Once you have selected the desired level of port security, return to
the Omega main menu.