Figure 7-10 Port Protect 
The following entries are displayed on this screen: 
¾  Port Protect 
Port Select:  Click the Select button to quick-select the corresponding port based on 
the port number you entered. 
 
Select:  Select the desired port for port protect configuration. It is 
multi-optional. 
 
Port:  Displays the port number of the switch.   
Loop Protect:  Loop Protect is to prevent the loops in the network brought by 
recalculating STP because of link failures and network congestions. 
 
Root Protect:  Root Protect is to prevent wrong network topology change caused by 
the role change of the current legal root bridge. 
 
TC Protect:  TC Protect is to prevent the decrease of the performance and stability 
of the switch brought by continuously removing MAC address entries 
upon receiving TC-BPDUs in the STP network.     
 
BPDU Protect:  BPDU Protect is to prevent the edge port from being attacked by 
maliciously created BPDUs 
 
BPDU Filter:  BPDU Filter is to prevent BPDUs flood in the STP network.   
LAG:  Displays the LAG number which the port belongs to.   
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