Enabling port security

When you configure port security, follow these restrictions and guidelines:

• 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.

• You can use the undo port-security enable command to disable port security. Because the command logs off 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, which is MAC-based.

  • Port authorization state, which is auto.

For more information about 802.1X authentication and MAC authentication configuration, see "Configuring 802.1X" and "Configuring MAC authentication."

Before you enable port security, disable 802.1X and MAC authentication globally.

1. Enter system view.

   system-view

2. Enable port security.

   port-security enable

   By default, port security is disabled.