Packet processing method, and device and system

A provider edge (PE) device, comprising:

• a memory storing instructions;
• and
• a processor coupled to the memory and configured to execute the instructions, wherein the instructions cause the processor to be configured to:
• receive a first Virtual Extensible Local Area Network (VxLAN) encapsulated packet from a network virtualization edge (NVE) device, wherein the PE device and the NVE device are located in a same data center (DC), and wherein the first VxLAN encapsulated packet comprises a first VxLAN network identifier VNI;
• parse the first VxLAN encapsulated packet to obtain the first VNI;
• obtain, according to a correspondence between a VNI and a virtual private network (VPN) routing and forwarding (VRF) table, a first VRF table that corresponds to the first VNI, wherein obtaining the first VRF table comprises searching a VRF table in the DC;
• search the first VRF table for a route according to a destination Internet Protocol (IP) address of the first VxLAN encapsulated packet;
• after the PE device obtains the first VRF table that corresponds to the first VNI, forward the first VxLAN encapsulated packet to a remote PE device;
• deploy a Border Gateway Protocol (BGP);
• receive a BGP route update message from the NVE device, wherein the BGP route update message comprises a VxLAN tunnel end point VTEP address and a VNI that corresponds to the VTEP address;
• and
• add the VTEP address in the BGP route update message to a second VRF table according to a correspondence between the second VRF table and the VNI that corresponds to the VTEP address.