Method and device for backing up lonworks network service (LNS)

Abstract

The invention provides a method for backing up a lonworks network service (LNS), and the method comprises the steps of receiving and locally storing information of a layer 2 tunneling protocol (L2TP) tunnel transmitted by a second LNS device staying at an active status through an expanded virtual router redundancy protocol (VRRP) message when a first LNS device stays at a standby status, wherein the tunnel information comprises a tunnel identification (ID), a conversation ID and an internet protocol (IP) address of a location area code (LAC); switching the first LNS device to the active status, activating the local stored tunnel information and issuing a host computer route of a virtual IP address to a network when the first LNS device staying the standby status ensures that the second LNS device staying at the active status has failure or receives an L2TP tunnel takeover notice transmitted by the second LNS device staying at the active status; and revoking the issued host route of the virtual IP address when the first LNS device is switched from the active status to the standby status. According to the method and the device, no requirement for the geological location of the devices which are mutually backed up each other exists, so that the networking flexibility is greatly improved.

Description

technical field [0001] The invention relates to the field of L2TP tunnels, in particular to a backup method and device for LNS equipment. Background technique [0002] With the continuous development of standardized and easily expandable network technology, the monitoring technology based on IP network has developed rapidly, and IP monitoring has become the mainstream of current monitoring. For security and cost reasons, most surveillance networks are deployed on private networks. Many public network users, as VC clients, want to access the monitoring resources of the private network. They will dial up to the relay device to access the private network through L2TP. The public network user acts as the LAC of the L2TP tunnel and the relay device acts as the LNS of the tunnel. figure 1 A schematic diagram of the aforementioned network is shown. However, as more and more public network users need to access the private network, the relay device as the LNS will become extremely ...

AI Technical Summary

Problems solved by technology

[0006] The technology of the invention solves the problem that LNS equipment cannot be backed up across three layers, and has no geographical location requirements for the equipment in mutual backup state, which greatly improves the flexibility of networking

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