Route configuration method and gateway after thermal migration of virtual machine in large two-layer network

Abstract

The invention provides a route configuration method and a gateway after thermal migration of a virtual machine in a large two-layer network. The method includes the following steps that the gateway obtains address information of a VM migrating into a first subnet and address information of a CN performing communication with the VM; the VM thermally migrates from a second subnet into the first subnet. The gateway sends a message of requesting set-up of a channel to the CN according to the address information of the CN; the message of requesting set-up of the channel is used for requesting set-up of a channel between the gateway and the CN and configures the channel to a route from the CN to the VM. According to the route configuration method and the gateway after thermal migration of the virtual machine in the large two-layer network, the gateway sets up the channel between the gateway and the CN and configures the channel to the route between the CN and the VM by obtaining the address information of the VM migrating into the subnet where the gateway exists and the address information of the CN which performs communication with the VM and sending the message of requesting set up of the channel to the CN. The path of the route between the CN and the VM is shortened and communication delay after the thermal migration of the VM of the large two-layer network is reduced to a certain degree.

Description

technical field [0001] Embodiments of the present invention relate to the field of computer networks, and more specifically, relate to a routing configuration method and a gateway after live migration of a virtual machine in a large two-layer network. Background technique [0002] Cloud computing and virtualization technology have made people put forward new requirements for the deployment and management of data centers, including multi-tenant (Multi-tenant) management, multiple virtual networks to achieve information isolation, and cross-data centers to realize virtual local area networks (Virtual LAN, VLAN) global deployment and so on. [0003] Large Layer 2 network technology uses Internet Protocol (IP) tunneling technology to enable VLANs to communicate with each other, forming an overlay network (Overlay network) on top of an IP network. [0004] However, after the virtual machine (Virtual Machine, VM) live migration (live migration), the peer node (Corresponding Node,...

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Problems solved by technology

[0004] However, after the virtual machine (Virtual Machine, VM) live migration (live migration), the peer node (Corresponding Node, CN) communicating with the VM does not know the migration action of the VM, and will still maintain a connection with the network before the VM migration , the data sent from the peer node CN arrives at the source network, and then passes through the internal routing of the large layer 2 network to reach the network after VM migration, resulting in a large detour on the communication path, resulting in the communication between VM and CN Latency increases, this phenomenon is called traffic trombone phenomenon

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