Method and device for determining migration of virtual machines

Abstract

An embodiment of the invention provides a method and a device for determining migration of virtual machines (VM). The method includes transmitting free ARP (address resolution protocol) messages or RARP (reverse address resolution protocol) messages to immigration VTEP [VXLAN (virtual extensible local area network) tunnel endpoint] equipment after the VM are migrated; acquiring MAC (media access control) addresses of the VM by the VTEP equipment, searching ARP Cache tables according to the MAC addresses and acquiring IP (internet protocol) addresses of the VM; constructing ARP unicast requestmessages by the aid of the IP addresses which are used as destination IP addresses, and determining that the VM are migrated if ARP response messages transmitted by the VM for the ARP unicast requestmessages are received by the VTEP equipment. The method and the device in the embodiment of the invention have the advantages that only the MAC addresses of the VM need to be acquired by the immigration equipment after the VM are migrated, and accordingly the fact that the VM are migrated can be determined; immigration of the VM can be sensed by the immigration equipment without constraints of thefree ARP messages transmitted by the virtual machines, and the virtual machine configuration compatibility can be effectively improved.

Description

technical field [0001] The present application relates to the field of communication technology, and in particular to a method and device for determining virtual machine (English: Virtual Machine, VM) migration. Background technique [0002] In the multi-tenant environment of cloud computing, each tenant needs to allocate a logical network that can be well isolated from other logical networks. The isolation of logical networks can be achieved through Virtual Extensible Local Area Network (VXLAN) technology. to fulfill. The VXLAN network is identified by a 24-bit VXLAN network identifier (VXLAN network identifier, VNI). [0003] Generally, VXLAN will be deployed in the data center (English: Data Center, DC) network, and the VXLAN tunnel endpoint (English: VXLAN Tunnel Endpoint, VTEP) is responsible for the encapsulation and decapsulation of VXLAN packets. VTEPs communicate through VXLAN tunnels. [0004] With the extensive use of the server virtualization technology of the...

AI Technical Summary

Problems solved by technology

The RARP message only carries the media access control (English: Media Access Control, MAC) address of the virtual machine. In the prior art, the migrated VTEP cannot confirm the migration of the virtual machine according to the RARP message.

[0006] Furthermore, in the prior art, the VTEP where the virtual machine migrates out cannot quickly sense the migration of the accessed virtual machine, which leads to the inability of the network to perform route convergence in a timely manner.

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