DATA MESSAGE PROCESSING METHOD, SYSTEM AND ACCESS SERVICE NODE

The present invention provides a method, an access node and a system for processing a data message implemented based on an identity-locator-separation network. The method includes: A. a source end host transmitting a Domain Name System (DNS) inquiry message carrying a domain name of a destination end host to a DNS server, and the DNS server returning a DNS response message including an Access Identifier (AID) of the destination end host to the source end host; B. an Access Service Node (ASN) monitoring the DNS response message to obtain the AID of the destination end host in the monitored response message; C. the ASN inquiring of a mapping server according to the AID of the destination end host to obtain a Router Identifier (RID)of the destination end host; and D. after receiving a data message transmitted by the source end host to the destination end host, the ASN forwarding the data message according to the RID of the destination end host. The present invention can enhance the efficiency of forwarding the data message of the source end host by the ASN and improve the forwarding performance of the ASN.