FORWARDING TABLE ENTRY ESTABLISHMENT METHOD AND APPARATUS

摘要

Embodiments of the present invention provide 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 first layer 3 gateway device and the second layer 3 gateway have a shared IP address, a shared MAC address, and a shared VTEP identifier. The first layer 3 gateway device and the second layer 3 gateway each have an exclusive IP address, an exclusive MAC address, and an exclusive VTEP identifier. The method includes: establishing, by the first layer 3 gateway device by using the exclusive P address, the exclusive MAC address, and the exclusive VTEP identifier, a forwarding entry used for communication with the first host. In the embodiments of this application, 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.