Patent ID: 8437354

Claim:
A method for realizing unicast reverse path forwarding, applied in an IPv6 network comprising an access equipment, a router, and a customer premises equipment, the method comprising: snooping into and obtaining, by the access equipment, an announcement message from the router, wherein the announcement message contains address prefix information; establishing, by the access equipment, a prefix table based on the obtained address prefix information; receiving, by the access equipment, an access request message from the customer premises equipment, determining whether a source IP address of the access request message exists in the prefix table, and deciding whether to forward the access request message to the router based on the result of determining; and under the circumstances that the announcement message snooped into and obtained by the access equipment is sent periodically by the router according to a predetermined period, and if the access equipment obtains a new announcement message, updating, by the access equipment, information recorded in the prefix table; and aging the information recorded in the prefix table if the information recorded in the prefix table is not updated within a predetermined time.