Backup system and method based on virtual router backup protocol

Abstract

The invention discloses a backup system and method based on a virtual router backup protocol. By selecting a master router and a backup router in advance from each router, the master router and the backup router include weight values ​​and virtual local area networks with the same routing path (Virtual LAN, VLAN), and select one of them as the communication representative in the virtual local area network, so that the communication representative of the main router will continuously transmit the notification packet to the communication representative of the backup router, and continuously transmit the address resolution protocol table to the backup router. When the communication representative of the backup router does not receive the notification packet, it judges that all the virtual local area networks of the main router are abnormal and replaces the main router, so as to achieve the technical effect of improving the backup switching efficiency and the available number of virtual local area networks.

Description

technical field [0001] The invention relates to a backup system and its method, in particular to a backup system and its method based on a virtual router backup protocol by reducing the transmission time interval and the number of transmissions to a virtual local area network of a notification packet. Background technique [0002] In recent years, industrial control has increasingly stringent requirements for network stability. In actual implementation, backup mechanisms are usually used to achieve network stability and reliability. [0003] Generally speaking, in order to make the network stable and reliable, the router can run the virtual router backup protocol (VirtualRouter Redundancy Protocol, VRRP), treat multiple routers as a virtual router, and select one of these routers as the main router, and the rest as the master router. Backup router. In this way, when the main router is abnormal, the backup router can replace the main router. Among them, the way to detect wh...

AI Technical Summary

Problems solved by technology

However, since this method still needs to transmit the notification packet to each virtual local area network, the number of available virtual local area networks will be limited based on bandwidth and time considerations. The problem with the limited number of LANs available

[0005] To sum up, it can be seen that there have been problems in the existing technology for a long time, such as poor backup switching efficiency and limited number of available virtual local area networks, so it is necessary to propose improved technical means to solve this problem

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