System and method for simultaneously supporting IPv4 and IPv6 main/standby switching

Abstract

The invention discloses a system and method for simultaneously supporting IPv4 and IPv6 main / standby switching. The system is composed of parts such as the Internet where an IPv4 address and an IPv6 address coexist, a master control apparatus, a backup apparatus and the like. VRRP message devices in the master control apparatus and the backup apparatus are composed of VRRP basic configuration modules and IP address composite modules. The IP address composite modules comprise IP address fields and other generated sign fields. According to the invention, through improving the structure of a VRRP message, virtual IPs of multiple types such as IPv4 and IPv6 can be included in one VRRP message, such that the VRRP message can be regarded as a backup group, the network configuration complexity is substantially reduced, at the same time, the VRRP message quantity is reduced, and the fewer network resources are occupied.

Description

technical field [0001] The invention relates to the field of network application delivery control, in particular to a system and method for simultaneously supporting IPv4 and IPv6 active-standby switching. Background technique [0002] Virtual Router Redundancy Protocol (VRRP for short) is a routing protocol proposed by the Internet Engineering Task Force (IETF) to solve the single point of failure phenomenon in the configuration of static gateways in LANs. The VRRPv2 version was officially released in 1998. VRRP organizes a group of routers in the local area network (including a Master (master router) and several Backup routers (backup routers) into a virtual router, which is called a backup group. This virtual router has its own IP, and these IPs are usually called virtual IPs. In a backup group, each real router also has its own IP address, which is generally used for communication between real routers. [0003] In a backup group, each router needs to negotiate to elect...

AI Technical Summary

Problems solved by technology

Although the standard VRRPv3 protocol can support both IPv4 and IPv6 address types, there are still many limitations in actual use: First, for a specific VRRP backup group, the protected virtual IP can only be an IPv4 or IPv6 address , so when deploying a dual-stack VRRP router, it is necessary to configure backup groups for IPv4 and IPv6 virtual IP addresses separately, which brings complexity in network configuration; secondly, because for a specific VRRP packet, its virtual IP can only be IPv4 Or IPv6 addresses, the two cannot be mixed, so routers need to send VRRP packets for IPv4 and IPv6 separately during negotiation, resulting in a waste of network bandwidth

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