P
ORT
S
ECURITY
C
OMMANDS
22-35
port security
This command enables or configures port security. Use the no form
without any keywords to disable port security. Use the no form with the
appropriate keyword to restore the default settings for a response to
security violation or for the maximum number of allowed addresses.
Syntax
port security [action {shutdown | trap | trap-and-shutdown}
| max-mac-count address-count]
no port security [action | max-mac-count]
• 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
• If you enable port security, the switch stops learning new MAC
addresses on the specified port when it has reached a configured
maximum number. Only incoming traffic with source addresses
already stored in the dynamic or static address table will be accepted.
• First use the port security max-mac-count command to set the
number of addresses, and then use the port security command to
enable security on the port.
•Use the no port security max-mac-count command to disable port
security and reset the maximum number of addresses to the default.
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