A multicast forwarding entry generation method includes receiving a first multicast packet from a first border gateway. The method also includes generating a first multicast forwarding entry based on the first multicast packet. The first multicast forwarding entry includes an address of the first border gateway and information about a multicast source. The method further includes receiving a second multicast packet from a second border gateway. The second multicast packet includes an address of the second border gateway and the information about the multicast source. The method additionally includes determining a first path to the multicast source through the first border gateway and a second path to the multicast source through the second border gateway. The method also includes determining an optimal path to the multicast source based on the first path and the second path, and generating a forwarding entry of the multicast source based on the optimal path.