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Enabling port security
Configuration prerequisites
Disable 802.1X and MAC authentication globally.
Configuration procedure
Follow these steps to enable port security:
To do… Use the command… Remarks
Enter system view system-view —
Enable port security port-security enable
Required
By default, the port security is disabled.
Enabling or disabling port security resets the following security settings to the default:
• 802.1X access control mode is MAC-based, and the port authorization state is auto.
• Port security mode is noRestrictions.
When port security is enabled, you cannot manually enable 802.1X or MAC authentication, or change
the access control mode or port authorization state. The port security automatically modifies these
settings in different security modes.
You cannot disable port security when online users are present.
NOTE:
• For more information about 802.1X configuration, see the chapter “802.1X configuration.”
• For more information about MAC authentication configuration, see the chapter “MAC authentication
configuration.”
Setting port security’s limit on the number of MAC
addresses on a port
You can set the maximum number of MAC addresses that port security allows on a port for the following
purposes:
• Controlling the number of concurrent users on the port. The maximum number of concurrent users on
the port equals this limit or the limit of the authentication mode (802.1X for example) in use,
whichever is smaller.
• Controlling the number of secure MAC addresses on the port in autoLearn mode.
Follow these steps to set the maximum number of secure MAC addresses allowed on a port:
To do… Use the command… Remarks
Enter system view system-view —
Enter Layer 2 Ethernet interface
view
interface interface-type
interface-number
—
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