A forwarder for a System Architecture Evolution / Long Term Evolution, SAE/LTE, system in which a control plane is separated from a forwarding plane and which comprises the forwarder and control device, wherein the forwarder implements forwarding plane functions of core network elements of the SAE/LTE system and the control device implements control plane functions of core network elements of the SAE/LTE system, comprising: a communications unit, configured to communicate with an external network element; and a processor, configured to: receive, by using the communications unit, an address request sent by the external network element, wherein the address request comprises a DHCP request of user equipment, UE, and user characteristic information of the UE; acquire, from a DHCP service network element according to the DHCP request, an IP address allocated to the UE; acquire, by using the communications unit, first instruction information that is delivered by the control device according to the user characteristic information of the UE and the IP address allocated to the UE, wherein the first instruction information is used to indicate sending, when a packet whose destination address is the IP address is received, the packet to the UE according to the user characteristic information; and send the IP address to the UE according to the user characteristic information by using the communications unit. a communications unit, configured to communicate with an external network element; and a processor, configured to: receive, by using the communications unit, an address request sent by the external network element, wherein the address request comprises a DHCP request of user equipment, UE, and user characteristic information of the UE; acquire, from a DHCP service network element according to the DHCP request, an IP address allocated to the UE; acquire, by using the communications unit, first instruction information that is delivered by the control device according to the user characteristic information of the UE and the IP address allocated to the UE, wherein the first instruction information is used to indicate sending, when a packet whose destination address is the IP address is received, the packet to the UE according to the user characteristic information; and send the IP address to the UE according to the user characteristic information by using the communications unit. receive, by using the communications unit, an address request sent by the external network element, wherein the address request comprises a DHCP request of user equipment, UE, and user characteristic information of the UE; acquire, from a DHCP service network element according to the DHCP request, an IP address allocated to the UE; acquire, by using the communications unit, first instruction information that is delivered by the control device according to the user characteristic information of the UE and the IP address allocated to the UE, wherein the first instruction information is used to indicate sending, when a packet whose destination address is the IP address is received, the packet to the UE according to the user characteristic information; and send the IP address to the UE according to the user characteristic information by using the communications unit.