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Chapter 20  DoS Defend Commands 
DoS (Denial of Service) Attack is to occupy the network bandwidth maliciously by the network 
attackers or the evil programs sending a lot of service requests to the Host. With the DoS Defend 
enabled, the switch can analyze the specific field of the received packets and provide the defend 
measures to ensure the normal working of the local network. 
20.1 ip dos-prevent 
Description 
The  ip dos-prevent  command is used to enable the DoS defend function 
globally. To disable the DoS defend function, please use no ip dos-prevent 
command.   
Syntax 
ip dos-prevent   
no ip dos-prevent 
Command Mode 
Global Configuration Mode 
Privilege Requirement 
Only Admin, Operator and Power User level users have access to these 
commands. 
Example 
Enable the DoS defend function globally: 
T2600G-28TS(config)#ip dos-prevent   
20.2 ip dos-prevent type 
Description 
The ip dos-prevent type command is used to select the DoS Defend Type. To 
disable the corresponding Defend Type, please use no  ip dos-prevent type 
command.