The pim hello-option neighbor-tracking command enables the neighbor tracking function in the interface view.
The undo pim hello-option neighbor-tracking command restores the default configuration.
By default, the neighbor tracking function is not enabled.
This command functions in the interface view in the same way as the hello-option neighbor-tracking command in the PIM view, except for the view. By default, if the configuration on the interface is not done, the configuration in the PIM view takes effect; otherwise, the configuration in the interface view takes effect.
You must run the multicast routing-enable command to enable the multicast function before using the command.