CLI Reference Guide-R04

Chapter 9 | General Security Measures
Port Security
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action - Response to take when port security is violated.
shutdown - Disable port only.
trap - Issue SNMP trap message only.
trap-and-shutdown - Issue SNMP trap message and disable port.
max-mac-count
address-count - The maximum number of MAC addresses that can be
learned on a port. (Range: 0 - 1024, where 0 means disabled)
Default Setting
Status: Disabled
Action: None
Maximum Addresses: 0
Command Mode
Interface Configuration (Ethernet)
Command Usage
◆ The default maximum number of MAC addresses allowed on a secure port is
zero (that is, port security is disabled). To use port security, you must configure
the maximum number of addresses allowed on a port using the port security
max-mac-count command.
◆ When port security is enabled using the port security command, or the
maximum number or allowed addresses is set to value lower than the current
limit after port security has been enabled, the switch first clears all dynamically
learned entries from the address table. It then starts learning new MAC
addresses on the specified port, and stops learning addresses when it reaches a
configured maximum number. Only incoming traffic with source addresses
already stored in the dynamic or static address table will be accepted.
◆ To configure the maximum number of address entries which can be learned on
a port, specify the maximum number of dynamic addresses allowed. The switch
will learn up to the maximum number of allowed address pairs <source MAC
address, VLAN> for frames received on the port. (The specified maximum
address count is effective when port security is enabled or disabled.) Note that
you can manually add additional secure addresses to a port using the mac-
address-table static command. When the port has reached the maximum