Method of controlling multiple DHCP Server dynamic distribution host addresses

The present invention discloses a method of controlling multiple DHCP Server dynamic distribution host addresses, and relates to the data communication field. According to the method, and on the basis of an original DHCP, two messages of DHCPHello and DHCPConsult used for coordinating the relation between the DHCP Servers are added, and a part of original messages are modified finely. The method is characterized in that when a plurality of DHCP servers exist in a local area network, the servers send the DHCPHello messages to verify mutually, after verification, a DHCP Server group is formed, so that the behavior that the malicious attackers pretend to be the DHCP servers to carry out the DHCP spoofing attacks, is avoided; after the group is established, the DHCP Servers continuously send the DHCPConsult messages to vote a master DHCP server, and the vote rule is that the server having more addresses in an address pool is prior, if having the same address number, the server having the maximum loopback address becomes the master server, and the rest DHCP Servers become the slave servers, and only the master server responds to the request messages of the clients. The advantages of the present invention are that: on the condition of normally and dynamically distributing the host addresses, the DHCP spoofing attacks are eliminated, at the same time, the bandwidth waste in the links is reduced.