Packet loss locating in VXLAN

A packet loss locating apparatus for locating loss of a service packet, the packet loss locating apparatus being a Virtual eXtensible Local Area Network Tunnel End Point (VTEP) wherein the packet loss locating apparatus comprises a non-transitory storage and a processor;

• the non-transitory storage is to store machine readable instructions executed by the processor;
• the processor is to read the machine readable instructions stored in the non-transitory storage to perform a process of:
• obtaining a simulation packet for simulating a service forwarding path which routes a service packet from the VTEP to another VTEP;
• wherein the service packet, which is sent from a first Virtual Machine (VM) being accessed to the VTEP to a second VM being accessed to another VTEP, did not reach the second VM, and packet character parameters of the simulation packet are same as packet character parameters of the service packet;
• calculating an outer User Datagram Protocol (UDP), source port number on the packet character parameters of the simulation packet basis via a local chip forwarding logic;
• performing a Virtual eXtensible Local Area Network (VXLAN) encapsulation for the simulation packet based on the UDP source port number and a VXLAN tunnel identification which is stored in a local register entry;
• wherein, the local register entry matches with the simulation packet;
• a value of the first reserve field of a VXLAN header of the simulation packet is a set value;
• forwarding the simulation packet with the VXLAN encapsulation through the VXLAN tunnel corresponding to the VXLAN tunnel identification, so that each device on the service forwarding path which has received the simulation packet with the VXLAN encapsulation sends a packet loss locating parameter to a packet loss locating device, which determines a packet loss location on the service forwarding path based on a device identity in the last received packet loss locating parameter.