Embodiments of the disclosure relate to a forwarding entry establishment method for a VXLAN. A data center of the VXLAN includes a first layer 3 gateway device, a second layer 3 gateway device, and a first layer 2 gateway device separately connected to the first layer 3 gateway device and the second layer 3 gateway device. The first layer 2 gateway device is connected to a first host. The method includes: establishing, by the first layer 3 gateway device by using an exclusive IP address, an exclusive MAC address, and an exclusive VTEP identifier, a forwarding entry used for communication with the first host. In the embodiments of the disclosure, when one host directly communicates with a plurality of layer 3 gateway devices, a forwarding entry used for communication between the layer 3 gateway devices and the host is correctly established.