The present application discloses a method for connecting a user device to a network. The access apparatus may obtain a first IP address from a fixed broadband network and a second IP address from a mobile broadband network, where the first IP address corresponds to a fixed broadband network link, and the second IP address corresponds to a radio link. The access apparatus receives a first packet from a user device, where a source IP address of the first packet is an IP address of the user device. The access apparatus obtains a translated IP address according to a service type of the first packet. The access apparatus obtains a second packet by replacing the source IP address of the first packet with the translated IP address, and sends the second packet to a link corresponding to the translated IP address.