An apparatus for realizing unicast reverse path forwarding, applied in an IPv6 network comprising an access equipment, a router, and a customer premises equipment, the apparatus being arranged in the access equipment, and the apparatus comprising:a snooping and obtaining module for snooping into and obtaining an announcement message from the router, wherein the announcement message contains address prefix information;an establishing module for establishing a prefix table based on the obtained address prefix information;a receiving module for receiving an access request message from the customer premises equipment; anda forwarding module for forwarding the message to the router if the source IP address of the access request message exists in the prefix table established by the establishing module.
