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• If a port is disabled (shut down) due to a security violation, it must be manually
re-enabled from the Port/Port Configuration page (page 3-91).
Command Attributes
•Port – Port number.
• Name – Descriptive text (page 4-132).
• Action – Indicates the action to be taken when a port security violation is detected:
- None: No action should be taken. (This is the default.)
- Trap: Send an SNMP trap message.
- Shutdown: Disable the port.
- Trap and Shutdown: Send an SNMP trap message and disable the port.
• Security Status – Enables or disables port security on the port. (Default: Disabled)
• Max MAC Count – The maximum number of MAC addresses that can be learned
on a port. (Range: 0 - 1024, where 0 means disabled)
• Trunk – Trunk number if port is a member (page 3-94 and 3-95).
Web – Click Security, Port Security. Mark the checkbox in the Status column to
enable security for a port, set the maximum number of MAC addresses allowed on a
port, and click Apply.
Figure 3-38 Configuring Port Security
CLI – This example selects the target port, sets the port security action to send a
trap and disable the port and sets the maximum MAC addresses allowed on the
port, and then enables port security for the port.
Console(config)#interface ethernet 1/5
Console(config-if)#port security action trap-and-shutdown 4-84
Console(config-if)#port security max-mac-count 20
Console(config-if)#port security
Console(config-if)#