Data transmission method, data transmission device and multi-layer network manager

Abstract

The embodiment of the invention discloses a data transmission method. The data transmission method comprises the following steps of: receiving a first address resolution protocol ARP message from a first client virtual machine; responding to the first ARP message, inquiring the address of an opposite end in a preset ARP mapping table, carrying the inquired address of the opposite end in a second ARP message, and sending the second ARP message to the first client virtual machine; receiving a data frame from the first client virtual machine; changing the first address of the first client virtual machine in the data frame into the second address of a first host virtual machine according to a preset forwarding strategy, wherein the first client virtual machine is operated on the first host virtual machine; and forwarding the changed data frame based on the address of the opposite end. The embodiment of the invention simultaneously discloses a data transmission device and a multi-layer network manager.

Description

technical field [0001] The invention relates to the field of cloud computing, and in particular, to a data transmission method, a device and a multi-layer network manager. Background technique [0002] At present, more and more enterprises are migrating application environments from private clouds to public cloud environments. In order not to modify the network configuration of application servers and the network connection relationship between them, they deploy nested virtualization on the public cloud. The environment makes it unnecessary to change the virtual machine format, the network configuration of the virtual machine and the environment configuration of the application when the application system is migrated, so as to realize the rapid deployment from the test environment to the production environment. [0003] Public clouds have multi-tenant characteristics, that is, multi-tenants share various virtualized resources, and computing resources in public clouds usually...

AI Technical Summary

Problems solved by technology

[0005] This limited virtualization network provides tenants with business security, but it also allows virtual machines running on it to cross multi-layer networks and external servers, such as other host virtual machines and remote servers. communications such as

First of all, because the Layer 2 broadcast traffic is limited, the virtual machines in the nested virtualization environment cannot establish an ARP connection with the external server; in addition, because the address of the virtual server that is not from the public cloud will be filtered, resulting in The unicast data packets sent by the virtual machines in the nested virtualization environment to the external server are discarded because they cannot pass the inspection of the public cloud network. These problems prevent the virtual machines running in the nested virtualization environment from crossing the restricted underlying layer The network establishes a normal communication connection with the external server

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