3Com 4200G 12-Port Configuration Manual page 154

[Switch] port-security enable
# Enter GigabitEthernet1/0/1 port view.
[Switch] interface GigabitEthernet 1/0/1
# Set the maximum number of MAC addresses allowed on the port to 80.
[Switch-GigabitEthernet1/0/1] port-security max-mac-count 80
# Set the port security mode to autolearn.
[Switch-GigabitEthernet1/0/1] port-security port-mode autolearn
# Add the MAC address 0001-0002-0003 of Host as a security MAC address to the port in VLAN 1.
[Switch-GigabitEthernet1/0/1] mac-address security 0001-0002-0003 vlan 1
# Configure the port to be silent for 30 seconds after intrusion protection is triggered.
[Switch-GigabitEthernet1/0/1] port-security intrusion-mode disableport-temporarily
[Switch-GigabitEthernet1/0/1] quit
[Switch] port-security timer disableport 30
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