177
Tasks at a
lance
Remarks
(Optional.) Ignoring authorization information from the server N/A
(Optional.) Enabling MAC move N/A
(Optional.) Applying NAS-ID profile to port security N/A
(Optional.) Enabling the authorization-fail-offline feature N/A
Enabling port security
Before you enable port security, disable 802.1X and MAC authentication globally.
When port security is enabled, you cannot enable 802.1X or MAC authentication, or change the access
control mode or port authorization state. Port security automatically modifies these settings in different
security modes.
To enable port security:
Ste
Command
Remarks
1. Enter system view.
system-view N/A
2. Enable port security.
port-security enable
By default, port security is
disabled.
You can use the undo port-security enable command to disable port security. Because the command logs
off the online users, make sure no online users are present.
Enabling or disabling port security resets the following security settings to the default:
• 802.1X access control mode is MAC based.
• 802.1X port authorization state is auto.
For more information about 802.1X authentication and MAC authentication configuration, see
"Configuring 802.1X" and "Configuring MAC authentication."
Setting port security's limit on the number of secure
MAC addresses on a port
You can set the maximum number of secure MAC addresses that port security allows on a port for the
following purposes:
• Controlling the number of concurrent users on the port.
For a port operating in a security mode (except for autoLearn and secure), the upper limit equals
the smaller of the following values:
{ The limit of the secure MAC addresses that port security allows.
{ The limit of concurrent users allowed by the authentication mode in use.
• Controlling the number of secure MAC addresses on the port in autoLearn mode.
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