TP-Link T1600G-18TS Configuration Manual page 266

Configuring Spanning Tree STP Security Configurations
Switch(config)#spanning-tree tc-defend threshold 25 period 8
Switch(config)#interface gigabitEthernet 1/0/3
Switch(config-if)#spanning-tree guard tc
Switch(config-if)#show spanning-tree interface-security gigabitEthernet 1/0/3
Interface BPDU-Filter BPDU-Guard Loop-Protect Root-Protect TC-Protect
---------- ----------- ---------- ------------ ------------ ---------
Gi1/0/3 Enable Enable Enable Enable Enable
Switch(config-if)#end
Switch#copy running-config startup-config
Configuration Guide 243