Forwarding table entry setting method and apparatus

摘要

A forwarding ingress establishment method for an Extensible Virtual Local Area Network, VXLAN, wherein a VXLAN data center comprises 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 has a first Internet Protocol IP address, a second IP address, a first Media Access Control MAC address corresponding to the first IP address, a second MAC address corresponding to the second IP address, a first VTEP tunnel endpoint VXLAN identifier corresponding to the first IP address and first MAC address, and a second VTEP identifier corresponding to the second IP address and second MAC address; The second Layer 3 gateway device has the first IP address, a third IP address, the first MAC address, a third MAC address corresponding to the third IP address, the first VTEP identifier, and a third VTEP identifier corresponding to the third IP address and the third MAC address; the first layer 2 gateway device has a fourth VTEP identifier; the first host has a fourth IP address and a fourth MAC address corresponding to the fourth IP address; The first IP address, the second IP address, the third IP address and the fourth IP address are different from each other; the first MAC address, the second MAC address, the third MAC address, and the fourth MAC address are different from each other; the first VTEP identifier, the second VTEP identifier, the third VTEP identifier and the fourth VTEP identifier are different from each other; and the method comprises: obtaining (210), by means of the first layer 3 gateway device, the fourth MAC address of the first host and the fourth VTEP identifier of the first layer 2 gateway device using the second IP address, the second MAC address, the second VTEP identifier, and the fourth IP address, where the second IP address is a unique IP address for the first Layer 3 gateway device, the second MAC address is a unique MAC address for the first Layer 3 gateway device, and the second VTEP identifier is a unique VTEP identifier for the first Layer 3 gateway device; and setting (220) a first forwarding entry based on the second IP address, the second MAC address, the second VTEP identifier, the fourth IP address, the fourth MAC address, and the fourth VTEP identifier, wherein in the first forwarding entry , a source IP address is the second IP address, a source MAC address is the second MAC address, a destination IP address is the fourth IP address, and a destination MAC address is the fourth MAC address, and the first entry of forwarding is used to indicate that the fourth MAC address corresponds to the fourth VTEP identifier.