port-security ntk-mode

Use port-security ntk-mode to configure the NTK feature.

Use undo port-security ntk-mode to restore the default.

Syntax

port-security ntk-mode { ntk-withbroadcasts | ntk-withmulticasts | ntkonly }

undo port-security ntk-mode

Default

The NTK feature is not configured on a port and all frames are allowed to be sent.

Views

Layer 2 Ethernet interface view

Predefined user roles

network-admin

mdc-admin

Parameters

ntk-withbroadcasts: Forwards only broadcast frames and unicast frames with authenticated destination MAC addresses.

ntk-withmulticasts: Forwards only broadcast frames, multicast frames, and unicast frames with authenticated destination MAC addresses.

ntkonly: Forwards only unicast frames with authenticated destination MAC addresses.

Usage guidelines

The NTK feature checks the destination MAC addresses in outbound frames. This feature allows frames to be sent only to devices passing authentication, preventing illegal devices from intercepting network traffic.

Examples

# Set the NTK mode of Ten-GigabitEthernet 1/0/1 to ntkonly, allowing the port to forward received packets only to devices passing authentication.

<Sysname> system-view
[Sysname] interface ten-gigabitethernet 1/0/1
[Sysname-Ten-GigabitEthernet1/0/1] port-security ntk-mode ntkonly

Related commands

display port-security