Method for realizing synchronous switching of virtual router redundancy protocol in dual-machine hot backup system

Abstract

The invention provides a method for realizing synchronous switching of a virtual router redundancy protocol (VRRP) in a dual-machine hot backup system. The method comprises the following steps: (a) automatic system switching strategy list is configured for main equipment and standby equipment according to running state and failure events of the equipment, and the configuration information is interacted by a data synchronization link; (b) after a failure event occurs, comprehensive optimum decision is performed on the main equipment and the standby equipment to determine whether to perform the main-standby switching; and (c) after the main-standby switching is determined, newly determined operational standby equipment initiatively reduces VRRP priority of the equipment according to the priority of a VRRP packet configured for opposite terminal equipment to perform the main-standby switching. The method helps fully utilize the message transmission capacity of the data synchronization link between the dual machines, and correlate the synchronous switching of the VRRP with the running state of the equipment, and the use of the automatic switching strategy list fully ensures the accuracy and reliability of the synchronous switching of the VRRP.

Description

technical field [0001] The invention relates to the field of network communication, in particular to a method for realizing VRRP synchronous switching in a dual-machine hot backup system based on the VRRP protocol. Background technique [0002] The Virtual Router Redundancy Protocol (VRRP for short) provides the network with transparent link redundancy and redundant backup capabilities of three-layer routing. However, the biggest disadvantage of the VRRP protocol is that its active-standby competition switching On one side of the system, the VRRP unilateral switching mechanism will be described below with reference to the accompanying drawings. [0003] figure 1 Both routers Router-A and Router-B are deployed on the upper and lower sides of the VRRP protocol, and the VRRP priority set by Router-A is high, so the status of the VRRP groups on the upper and lower sides of Router-A is Master, and Router-A is running The main machine is responsible for all data traffic, while R...

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Problems solved by technology

[0010] 1. The VRRP protocol is privately extended, and various new messages such as hello message, hello reply message, and Vrrp change message are defined, which are relatively complicated;

[0011]Second, VRRP group synchronous switchover does not take into account the comprehensive operating status and service status of the equipment, but only related to the interface of the VRRP group. If an interface in the VRRP group fails, even if there are still many other interfaces in the VRRP group that can continue to provide services, switching will still occur. However, in the actual networking of many business devices, this is not reasonable

[0012] 3. VGMP cannot avoid the repeated switching of the master-backup relationship between the two machines due to the repeated changes in the physical state of the VRRP interface, commonly known as "ping-pong switching".

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