A switching method of dual-machine hot standby based on isolation equipment

Abstract

A switching method based on the dual-system hot standby of the isolation device. The key fields of seq and ack in the tcp link are sent from the external network and the internal network. The isolation device internal machine and the isolation device external machine just forward and use them. For the data sent by the external unit of the isolation device to the internal unit of the isolation device and the data sent by the internal unit of the isolation device to the external unit of the isolation device, the internal unit of the isolation device and the external unit of the isolation device will only modify the source ip, destination ip, source port, and destination port. This information, the tcp fields of seq and ack will not be modified. It avoids the disconnection of the link caused by the isolation device during the switching process.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a switching method for dual-machine hot backup based on isolation equipment. Background technique [0002] In the current working mode of the isolation product, when the external network and the internal network need to communicate, they need to pass through the isolation device. The external network needs to establish a connection with the external machine first, and the internal machine and the internal network establish a link. It is transmitted to the internal machine, and the internal machine transmits the data to the internal network through the link with the internal network. The isolation device is further divided into the main device that is currently working and the standby device that takes over when the main device fails. Heartbeat detection is used between the main device and the standby device to determine whether the main device is normal and whether ...

AI Technical Summary

Problems solved by technology

[0004] The existing solution is for a single device to perform master / standby switchover. The isolated device is divided into an external unit and an internal unit, which need to establish links with the external network and the internal network respectively. Considering the characteristics of internal and external dual links, information is transmitted on the internal and external networks. If the master device fails to switch over during the process, there is a high probability that the backup device has not updated the current link information. At this time, the backup device cannot communicate normally after it is enabled. At the same time, the link information of the internal and external devices is synchronized in real time through the heartbeat line. Greatly increases the network burden of the heartbeat line, which is easy to interfere with the normal heartbeat detection

So the existing solution is not suitable for isolating products

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