The stp tc-restriction enable command enables TC/TCN packet suppression.
The undo stp tc-restriction enable command disables TC/TCN packet suppression.
By default, TC/TCN packet suppression is disabled.
Usage Scenario
If TC/TCN packets do not need to be flooded, you can run the stp tc-restriction enable command to enable TC/TCN packet suppression. In this way, after receiving TC/TCN packets, an interface neither updates local ARP and MAC entries nor floods the packets to other interfaces on the device.