The semantic overload of IP address, representing not only the identifiers of nodes but also the locators of nodes, is one of the fundamental reasons for hindering the development of current Internet. Therefore, the identifier-locator split mapping network which separates the two functions has become one of the federating themes for future Internet architecture. However, DDoS attacks are still in existence in this network. In this paper, we use the attack traffic to discuss and compare the effects of DDoS attacks on the current Internet and the identifier-locator split mapping network. The numerical and simulation analyses show that the identifier-locator split mapping network alleviates DDoS attacks more effectively compared with the current Internet.