T3700G-28TQ
 
JetStream 28-Port Gigabit Stackable L3 Managed Switch CLI Guide 
 
214 
spanning-tree priority 
Description 
The spanning-tree priority command is used to configure the bridge priority. To 
return to the default value of bridge priority, please use no spanning-tree 
priority command. 
Syntax 
spanning-tree priority priority 
no spanning-tree priority   
Parameter 
priority  ——  Bridge priority, ranging from 0 to 61440. The priority must be an 
integral multiple of 4096 and it is 32768 by default. 
Command Mode 
Global Configuration Mode 
Example 
Configure the bridge priority as 4096: 
T3700G-28TQ(config)#spanning-tree priority 4096 
spanning-tree tc-defend 
Description 
The spanning-tree tc-defend command is used to configure the TC Protect of 
Spanning Tree globally. To return to the default configuration, please use no 
spanning-tree tc-defend command. A switch removes MAC address entries 
upon receiving TC-BPDUs. If a malicious user continuously sends TC-BPDUs to 
a switch, the switch will be busy with removing MAC address entries, which may 
decrease the performance and stability of the network. 
Syntax 
spanning-tree tc-defend threshold threshold period period 
no spanning-tree tc-defend 
Parameter 
threshold  ——  TC Threshold, ranging from 1 to 100 packets. By default, it is 20. 
TC Threshold is the maximum number of the TC-BPDUs received by the switch 
in a TC Protect Cycle.